1 | /* |
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2 | * ---------------------------------------------------------------------- |
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3 | * RpDiffview - like a textbox, but for showing diffs |
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4 | * |
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5 | * Loads two strings, performs a diff, and shows the results. Use |
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6 | * it as follows: |
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7 | * |
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8 | * Rappture::Diffview .dv \ |
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9 | * -addedbackground blue -addedforeground white \ |
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10 | * -deletedbackground red -deletedforeground white -overstrike true \ |
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11 | * -changedbackground black -changedforeground yellow \ |
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12 | * -xscrollcommand {.x set} -yscrollcommand {.y set} |
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13 | * |
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14 | * scrollbar .x -orient horizontal -command {.dv xview} |
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15 | * scrollbar .y -orient vertical -command {.dv yview} |
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16 | * |
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17 | * .dv text 1 [exec cat /tmp/file1] |
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18 | * .dv text 2 [exec cat /tmp/file2] |
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19 | * .dv configure -diff 2->1 -layout sidebyside |
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20 | * |
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21 | * puts "DIFF OUTPUT:" |
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22 | * puts [.dv diffs -std] |
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23 | * |
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24 | * ====================================================================== |
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25 | * AUTHOR: Michael McLennan, Purdue University |
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26 | * Copyright (c) 2004-2012 HUBzero Foundation, LLC |
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27 | * |
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28 | * See the file "license.terms" for information on usage and |
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29 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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30 | * ====================================================================== |
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31 | */ |
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32 | #include "tk.h" |
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33 | #include <string.h> |
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34 | #include <stdlib.h> |
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35 | |
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36 | /* |
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37 | * Special options for controlling diffs. |
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38 | */ |
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39 | enum diffdir { |
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40 | DIFF_1TO2, DIFF_2TO1 |
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41 | }; |
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42 | static char *diffdirStrings[] = { |
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43 | "1->2", "2->1", (char*)NULL |
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44 | }; |
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45 | |
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46 | enum layoutStyle { |
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47 | LAYOUT_INLINE, LAYOUT_SIDEBYSIDE |
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48 | }; |
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49 | static char *layoutStyleStrings[] = { |
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50 | "inline", "sidebyside", (char*)NULL |
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51 | }; |
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52 | |
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53 | enum scancommand { |
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54 | SCAN_MARK, SCAN_DRAGTO |
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55 | }; |
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56 | static CONST char *scanCommandNames[] = { |
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57 | "mark", "dragto", (char *) NULL |
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58 | }; |
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59 | |
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60 | |
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61 | /* |
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62 | * Data structure for line start/end for all lines in a buffer. |
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63 | */ |
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64 | typedef struct { |
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65 | int numLines; /* number of lines */ |
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66 | int maxLines; /* max size of storage in startPtr/endPtr */ |
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67 | char **startPtr; /* array of start pointers for each line */ |
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68 | int *lenPtr; /* array of lengths for each line */ |
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69 | } DiffviewLines; |
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70 | |
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71 | /* |
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72 | * Data structure for text buffers within the widget: |
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73 | */ |
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74 | typedef struct { |
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75 | Tcl_Obj *textObj; /* actual text within this buffer */ |
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76 | DiffviewLines *lineLimits; /* breakdown of textObj into line starts/ends */ |
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77 | } DiffviewBuffer; |
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78 | |
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79 | /* |
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80 | * Data structure used internally by diff routine: |
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81 | */ |
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82 | typedef struct subseq { |
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83 | int index1; /* index in buffer #1 */ |
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84 | int index2; /* index in buffer #2 */ |
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85 | int next; /* next candidate match in the chain */ |
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86 | } DiffviewSubseq; |
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87 | |
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88 | /* |
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89 | * Data structure returned by diff routine: |
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90 | */ |
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91 | typedef struct { |
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92 | int op; /* operation: 'a'=add 'd'=del 'c'=change */ |
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93 | int fromIndex1; /* starts at this line in buffer 1 */ |
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94 | int toIndex1; /* ends at this line in buffer 1 */ |
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95 | int fromIndex2; /* starts at this line in buffer 2 */ |
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96 | int toIndex2; /* ends at this line in buffer 2 */ |
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97 | int fromWorld; /* starts at this line in world view */ |
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98 | int toWorld; /* ends at this line in world view */ |
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99 | } DiffviewDiffOp; |
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100 | |
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101 | typedef struct { |
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102 | int maxDiffs; /* maximum storage space for diffs */ |
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103 | int numDiffs; /* number of diffs stored in ops */ |
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104 | DiffviewDiffOp *ops; /* list of diffs */ |
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105 | } DiffviewDiffs; |
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106 | |
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107 | /* |
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108 | * Data structure used for each line of the final layout: |
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109 | */ |
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110 | typedef struct { |
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111 | char style; /* layout style: 'a'=add, 'd'=del, etc. */ |
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112 | char bnum; /* show line from this buffer */ |
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113 | int bline; /* line number in buffer bnum */ |
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114 | int diffNum; /* line is part of this diff */ |
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115 | } DiffviewLayoutLine; |
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116 | |
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117 | typedef struct { |
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118 | int maxLines; /* maximum number of lines allocated */ |
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119 | int numLines; /* current number of lines in layout */ |
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120 | DiffviewLayoutLine *lines; /* info for all lines in world view */ |
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121 | } DiffviewLayout; |
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122 | |
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123 | /* |
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124 | * Data structure for the widget: |
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125 | */ |
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126 | typedef struct { |
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127 | Tk_Window tkwin; /* tk window for the widget */ |
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128 | Display *display; /* display containing the widget */ |
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129 | Tcl_Interp *interp; /* interpreter containing the widget command */ |
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130 | Tcl_Command widgetCmd; /* token for the widget command */ |
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131 | Tk_OptionTable optionTable; /* configuration options */ |
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132 | |
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133 | /* |
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134 | * Used to display the widget: |
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135 | */ |
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136 | Tk_Cursor cursor; /* cursor for the widget */ |
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137 | Tk_3DBorder normalBorder; /* border around the widget */ |
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138 | int borderWidth; /* width of the border in pixels */ |
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139 | int relief; /* relief: raised, sunken, etc. */ |
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140 | int highlightWidth; /* width of border showing focus highlight */ |
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141 | XColor *highlightBgColor; /* color for focus highlight bg */ |
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142 | XColor *highlightColor; /* color for focus highlight */ |
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143 | int inset; /* width of all borders--offset to ul corner */ |
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144 | |
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145 | DiffviewBuffer buffer[2]; /* text to diff -- buffers #1 and #2 */ |
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146 | DiffviewDiffs *diffsPtr; /* diff: longest common subseq btwn buffers */ |
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147 | DiffviewLayout worldview; /* array mapping each real line in world |
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148 | * coordinates to the corresponding line |
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149 | * in buffer #1/#2, along with its style */ |
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150 | |
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151 | enum diffdir diffdir; /* diff between these buffers */ |
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152 | enum layoutStyle layout; /* layout style (side-by-side or inline) */ |
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153 | int maxWidth; /* maximum width of world view in pixels */ |
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154 | int maxHeight; /* maximum height of world view in pixels */ |
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155 | int lineHeight; /* height of a line with current font */ |
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156 | int lineAscent; /* ascent of a line with current font */ |
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157 | int topLine; /* index of topmost line in view */ |
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158 | int btmLine; /* index of bottommost line in view */ |
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159 | int fullLines; /* number of full lines that fit in view */ |
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160 | |
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161 | int xOffset; /* offset in pixels to left edge of view */ |
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162 | int xScrollUnit; /* num pixels for one unit of horizontal |
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163 | * scrolling (one average character) */ |
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164 | int yOffset; /* offset in pixels to top edge of view */ |
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165 | int yScrollUnit; /* num pixels for one unit of vertical |
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166 | * scrolling (one average line) */ |
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167 | char *takeFocus; /* value of -takefocus option */ |
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168 | char *yScrollCmd; /* command prefix for scrolling */ |
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169 | char *xScrollCmd; /* command prefix for scrolling */ |
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170 | |
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171 | int scanMarkX; /* x-coord for "scan mark" */ |
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172 | int scanMarkY; /* y-coord for "scan mark" */ |
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173 | int scanMarkXStart; /* xOffset at start of scan */ |
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174 | int scanMarkYStart; /* yOffset at start of scan */ |
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175 | |
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176 | |
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177 | Tk_Font tkfont; /* text font for content of widget */ |
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178 | Tk_Font tklastfont; /* previous text font (so we detect changes) */ |
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179 | XColor *fgColorPtr; /* normal foreground color */ |
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180 | XColor *addBgColorPtr; /* background for "added" text in diff */ |
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181 | XColor *addFgColorPtr; /* foreground for "added" text in diff */ |
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182 | XColor *delBgColorPtr; /* background for "deleted" text in diff */ |
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183 | XColor *delFgColorPtr; /* foreground for "deleted" text in diff */ |
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184 | XColor *chgBgColorPtr; /* background for "changed" text in diff */ |
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185 | XColor *chgFgColorPtr; /* foreground for "changed" text in diff */ |
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186 | int overStrDel; /* non-zero => overstrike deleted text */ |
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187 | GC normGC; /* GC for drawing normal text */ |
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188 | GC addFgGC; /* GC for drawing "added" text in diff */ |
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189 | GC delFgGC; /* GC for drawing "deleted" text in diff */ |
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190 | GC chgFgGC; /* GC for drawing "changed" text in diff */ |
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191 | int width; /* overall width of widget, in pixels */ |
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192 | int height; /* overall height of widget, in pixels */ |
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193 | |
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194 | int flags; /* flag bits for redraw, etc. */ |
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195 | } Diffview; |
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196 | |
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197 | /* |
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198 | * Tk widget flag bits: |
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199 | * |
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200 | * REDRAW_PENDING: DoWhenIdle handler has been queued to redraw |
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201 | * UPDATE_V_SCROLLBAR: non-zero => vertical scrollbar needs updating |
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202 | * UPDATE_H_SCROLLBAR: non-zero => horizontal scrollbar needs updating |
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203 | * GOT_FOCUS: non-zero => widget has input focus |
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204 | * FONT_CHANGED: font changed, so layout needs to be recomputed |
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205 | * WIDGET_DELETED: widget has been destroyed, so don't update |
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206 | */ |
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207 | |
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208 | #define REDRAW_PENDING 1 |
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209 | #define UPDATE_V_SCROLLBAR 2 |
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210 | #define UPDATE_H_SCROLLBAR 4 |
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211 | #define GOT_FOCUS 8 |
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212 | #define FONT_CHANGED 16 |
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213 | #define WIDGET_DELETED 32 |
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214 | |
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215 | |
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216 | /* |
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217 | * Default option values. |
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218 | */ |
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219 | #define BLACK "#000000" |
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220 | #define WHITE "#ffffff" |
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221 | #define NORMAL_BG "#d9d9d9" |
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222 | |
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223 | #define DEF_DIFFVIEW_ADDBG "#ccffcc" |
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224 | #define DEF_DIFFVIEW_ADDFG BLACK |
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225 | #define DEF_DIFFVIEW_BG_COLOR NORMAL_BG |
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226 | #define DEF_DIFFVIEW_BG_MONO WHITE |
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227 | #define DEF_DIFFVIEW_BORDERWIDTH "2" |
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228 | #define DEF_DIFFVIEW_CHGBG "#ffffcc" |
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229 | #define DEF_DIFFVIEW_CHGFG BLACK |
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230 | #define DEF_DIFFVIEW_CURSOR "" |
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231 | #define DEF_DIFFVIEW_DELBG "#ffcccc" |
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232 | #define DEF_DIFFVIEW_DELFG "#666666" |
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233 | #define DEF_DIFFVIEW_DIFF "1->2" |
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234 | #define DEF_DIFFVIEW_FG BLACK |
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235 | #define DEF_DIFFVIEW_FONT "Courier -12" |
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236 | #define DEF_DIFFVIEW_HEIGHT "2i" |
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237 | #define DEF_DIFFVIEW_HIGHLIGHT_BG NORMAL_BG |
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238 | #define DEF_DIFFVIEW_HIGHLIGHT BLACK |
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239 | #define DEF_DIFFVIEW_HIGHLIGHT_WIDTH "1" |
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240 | #define DEF_DIFFVIEW_LAYOUT "inline" |
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241 | #define DEF_DIFFVIEW_OVERSTRDEL "true" |
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242 | #define DEF_DIFFVIEW_RELIEF "sunken" |
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243 | #define DEF_DIFFVIEW_TAKE_FOCUS (char*)NULL |
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244 | #define DEF_DIFFVIEW_WIDTH "2i" |
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245 | #define DEF_DIFFVIEW_SCROLL_CMD "" |
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246 | |
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247 | /* |
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248 | * Configuration options for this widget. |
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249 | * (must be in alphabetical order) |
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250 | */ |
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251 | static Tk_OptionSpec optionSpecs[] = { |
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252 | {TK_OPTION_COLOR, "-addedbackground", "addedBackground", "Background", |
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253 | DEF_DIFFVIEW_ADDBG, -1, Tk_Offset(Diffview, addBgColorPtr), |
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254 | TK_OPTION_NULL_OK, 0, 0}, |
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255 | {TK_OPTION_COLOR, "-addedforeground", "addedForeground", "Foreground", |
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256 | DEF_DIFFVIEW_ADDFG, -1, Tk_Offset(Diffview, addFgColorPtr), |
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257 | TK_OPTION_NULL_OK, 0, 0}, |
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258 | {TK_OPTION_BORDER, "-background", "background", "Background", |
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259 | DEF_DIFFVIEW_BG_COLOR, -1, Tk_Offset(Diffview, normalBorder), |
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260 | 0, (ClientData) DEF_DIFFVIEW_BG_MONO, 0}, |
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261 | {TK_OPTION_SYNONYM, "-bd", (char*)NULL, (char*)NULL, |
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262 | (char*)NULL, 0, -1, 0, (ClientData) "-borderwidth", 0}, |
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263 | {TK_OPTION_SYNONYM, "-bg", (char*)NULL, (char*)NULL, |
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264 | (char*)NULL, 0, -1, 0, (ClientData) "-background", 0}, |
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265 | {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth", |
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266 | DEF_DIFFVIEW_BORDERWIDTH, -1, Tk_Offset(Diffview, borderWidth), |
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267 | 0, 0, 0}, |
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268 | {TK_OPTION_COLOR, "-changedbackground", "changedBackground", "Background", |
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269 | DEF_DIFFVIEW_CHGBG, -1, Tk_Offset(Diffview, chgBgColorPtr), |
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270 | TK_OPTION_NULL_OK, 0, 0}, |
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271 | {TK_OPTION_COLOR, "-changedforeground", "changedForeground", "Foreground", |
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272 | DEF_DIFFVIEW_CHGFG, -1, Tk_Offset(Diffview, chgFgColorPtr), |
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273 | TK_OPTION_NULL_OK, 0, 0}, |
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274 | {TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor", |
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275 | DEF_DIFFVIEW_CURSOR, -1, Tk_Offset(Diffview, cursor), |
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276 | TK_OPTION_NULL_OK, 0, 0}, |
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277 | {TK_OPTION_COLOR, "-deletedbackground", "deletedBackground", "Background", |
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278 | DEF_DIFFVIEW_DELBG, -1, Tk_Offset(Diffview, delBgColorPtr), |
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279 | TK_OPTION_NULL_OK, 0, 0}, |
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280 | {TK_OPTION_COLOR, "-deletedforeground", "deletedForeground", "Foreground", |
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281 | DEF_DIFFVIEW_DELFG, -1, Tk_Offset(Diffview, delFgColorPtr), |
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282 | TK_OPTION_NULL_OK, 0, 0}, |
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283 | {TK_OPTION_STRING_TABLE, "-diff", "diff", "Diff", |
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284 | DEF_DIFFVIEW_DIFF, -1, Tk_Offset(Diffview, diffdir), |
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285 | 0, (ClientData)diffdirStrings, 0}, |
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286 | {TK_OPTION_SYNONYM, "-fg", "foreground", (char*)NULL, |
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287 | (char*)NULL, 0, -1, 0, (ClientData) "-foreground", 0}, |
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288 | {TK_OPTION_FONT, "-font", "font", "Font", |
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289 | DEF_DIFFVIEW_FONT, -1, Tk_Offset(Diffview, tkfont), 0, 0, 0}, |
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290 | {TK_OPTION_COLOR, "-foreground", "foreground", "Foreground", |
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291 | DEF_DIFFVIEW_FG, -1, Tk_Offset(Diffview, fgColorPtr), 0, 0, 0}, |
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292 | {TK_OPTION_PIXELS, "-height", "height", "Height", |
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293 | DEF_DIFFVIEW_HEIGHT, -1, Tk_Offset(Diffview, height), 0, 0, 0}, |
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294 | {TK_OPTION_COLOR, "-highlightbackground", "highlightBackground", |
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295 | "HighlightBackground", DEF_DIFFVIEW_HIGHLIGHT_BG, -1, |
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296 | Tk_Offset(Diffview, highlightBgColor), 0, 0, 0}, |
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297 | {TK_OPTION_COLOR, "-highlightcolor", "highlightColor", "HighlightColor", |
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298 | DEF_DIFFVIEW_HIGHLIGHT, -1, Tk_Offset(Diffview, highlightColor), |
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299 | 0, 0, 0}, |
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300 | {TK_OPTION_PIXELS, "-highlightthickness", "highlightThickness", |
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301 | "HighlightThickness", DEF_DIFFVIEW_HIGHLIGHT_WIDTH, -1, |
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302 | Tk_Offset(Diffview, highlightWidth), 0, 0, 0}, |
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303 | {TK_OPTION_STRING_TABLE, "-layout", "layout", "Layout", |
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304 | DEF_DIFFVIEW_LAYOUT, -1, Tk_Offset(Diffview, layout), |
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305 | 0, (ClientData)layoutStyleStrings, 0}, |
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306 | {TK_OPTION_BOOLEAN, "-overstrike", "overstrike", "Overstrike", |
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307 | DEF_DIFFVIEW_OVERSTRDEL, -1, Tk_Offset(Diffview, overStrDel), 0, 0, 0}, |
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308 | {TK_OPTION_RELIEF, "-relief", "relief", "Relief", |
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309 | DEF_DIFFVIEW_RELIEF, -1, Tk_Offset(Diffview, relief), 0, 0, 0}, |
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310 | {TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus", |
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311 | DEF_DIFFVIEW_TAKE_FOCUS, -1, Tk_Offset(Diffview, takeFocus), |
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312 | TK_OPTION_NULL_OK, 0, 0}, |
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313 | {TK_OPTION_PIXELS, "-width", "width", "Width", |
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314 | DEF_DIFFVIEW_WIDTH, -1, Tk_Offset(Diffview, width), 0, 0, 0}, |
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315 | {TK_OPTION_STRING, "-xscrollcommand", "xScrollCommand", "ScrollCommand", |
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316 | DEF_DIFFVIEW_SCROLL_CMD, -1, Tk_Offset(Diffview, xScrollCmd), |
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317 | TK_OPTION_NULL_OK, 0, 0}, |
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318 | {TK_OPTION_STRING, "-yscrollcommand", "yScrollCommand", "ScrollCommand", |
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319 | DEF_DIFFVIEW_SCROLL_CMD, -1, Tk_Offset(Diffview, yScrollCmd), |
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320 | TK_OPTION_NULL_OK, 0, 0}, |
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321 | {TK_OPTION_END, (char*)NULL, (char*)NULL, (char*)NULL, |
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322 | (char*)NULL, 0, -1, 0, 0, 0} |
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323 | }; |
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324 | |
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325 | /* |
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326 | * Widget commands: |
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327 | */ |
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328 | static CONST char *commandNames[] = { |
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329 | "bbox", "cget", "configure", |
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330 | "diffs", "scan", "see", |
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331 | "text", "xview", "yview", |
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332 | (char*)NULL |
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333 | }; |
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334 | |
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335 | enum command { |
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336 | COMMAND_BBOX, COMMAND_CGET, COMMAND_CONFIGURE, |
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337 | COMMAND_DIFFS, COMMAND_SCAN, COMMAND_SEE, |
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338 | COMMAND_TEXT, COMMAND_XVIEW, COMMAND_YVIEW |
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339 | }; |
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340 | |
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341 | /* |
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342 | * Forward declarations for remaining procedures. |
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343 | */ |
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344 | static int DiffviewObjCmd _ANSI_ARGS_((ClientData clientData, |
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345 | Tcl_Interp *interp, int objc, |
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346 | Tcl_Obj *CONST objv[])); |
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347 | static int DiffviewWidgetObjCmd _ANSI_ARGS_((ClientData clientData, |
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348 | Tcl_Interp *interp, int objc, |
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349 | Tcl_Obj *CONST objv[])); |
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350 | static int DiffviewBboxSubCmd _ANSI_ARGS_ ((Tcl_Interp *interp, |
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351 | Diffview *dvPtr, int objc, Tcl_Obj *CONST objv[])); |
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352 | static int DiffviewDiffsSubCmd _ANSI_ARGS_ ((Tcl_Interp *interp, |
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353 | Diffview *dvPtr, int objc, Tcl_Obj *CONST objv[])); |
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354 | static int DiffviewTextSubCmd _ANSI_ARGS_ ((Tcl_Interp *interp, |
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355 | Diffview *dvPtr, int objc, Tcl_Obj *CONST objv[])); |
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356 | static int DiffviewXviewSubCmd _ANSI_ARGS_ ((Tcl_Interp *interp, |
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357 | Diffview *dvPtr, int objc, Tcl_Obj *CONST objv[])); |
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358 | static int DiffviewYviewSubCmd _ANSI_ARGS_ ((Tcl_Interp *interp, |
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359 | Diffview *dvPtr, int objc, Tcl_Obj *CONST objv[])); |
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360 | static int DiffviewGetIndex _ANSI_ARGS_ ((Tcl_Interp *interp, |
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361 | Diffview *dvPtr, Tcl_Obj *objPtr, int *linePtr, |
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362 | DiffviewDiffOp **diffOpPtrPtr)); |
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363 | |
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364 | static void DestroyDiffview _ANSI_ARGS_((char *memPtr)); |
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365 | static int ConfigureDiffview _ANSI_ARGS_((Tcl_Interp *interp, |
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366 | Diffview *dvPtr, int objc, Tcl_Obj *CONST objv[], |
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367 | int flags)); |
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368 | static void DiffviewWorldChanged _ANSI_ARGS_(( |
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369 | ClientData instanceData)); |
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370 | static void EventuallyRedraw _ANSI_ARGS_((Diffview *dvPtr)); |
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371 | static void DisplayDiffview _ANSI_ARGS_((ClientData clientData)); |
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372 | static void DiffviewComputeGeometry _ANSI_ARGS_((Diffview *dvPtr)); |
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373 | static void DiffviewEventProc _ANSI_ARGS_((ClientData clientData, |
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374 | XEvent *eventPtr)); |
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375 | static void DiffviewCmdDeletedProc _ANSI_ARGS_(( |
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376 | ClientData clientData)); |
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377 | static void ChangeDiffviewView _ANSI_ARGS_((Diffview *dvPtr, |
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378 | int lnum)); |
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379 | static void DiffviewScanTo _ANSI_ARGS_((Diffview *dvPtr, |
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380 | int x, int y)); |
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381 | static void DiffviewUpdateLayout _ANSI_ARGS_(( |
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382 | Diffview *dvPtr)); |
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383 | static void DiffviewUpdateVScrollbar _ANSI_ARGS_(( |
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384 | Diffview *dvPtr)); |
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385 | static void DiffviewUpdateHScrollbar _ANSI_ARGS_(( |
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386 | Diffview *dvPtr)); |
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387 | static DiffviewLines* DiffviewLinesCreate _ANSI_ARGS_((char *textPtr, |
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388 | int textLen)); |
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389 | static void DiffviewLinesFree _ANSI_ARGS_(( |
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390 | DiffviewLines *lineLimitsPtr)); |
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391 | static DiffviewDiffs* DiffviewDiffsCreate _ANSI_ARGS_(( |
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392 | char *textPtr1, DiffviewLines *limsPtr1, |
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393 | char *textPtr2, DiffviewLines *limsPtr2)); |
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394 | static void DiffviewDiffsAppend _ANSI_ARGS_(( |
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395 | DiffviewDiffs *diffsPtr, int op, |
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396 | int fromIndex1, int toIndex1, |
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397 | int fromIndex2, int toIndex2)); |
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398 | static void DiffviewDiffsFree _ANSI_ARGS_(( |
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399 | DiffviewDiffs *diffsPtr)); |
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400 | static void DiffviewLayoutAdd _ANSI_ARGS_(( |
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401 | DiffviewLayout *layoutPtr, |
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402 | DiffviewLayoutLine *linePtr)); |
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403 | static void DiffviewLayoutClear _ANSI_ARGS_(( |
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404 | DiffviewLayout *layoutPtr)); |
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405 | static void DiffviewLayoutFree _ANSI_ARGS_(( |
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406 | DiffviewLayout *layoutPtr)); |
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407 | |
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408 | /* |
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409 | * Standard Tk procs invoked from generic window code. |
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410 | */ |
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411 | static Tk_ClassProcs diffviewClass = { |
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412 | sizeof(Tk_ClassProcs), /* size */ |
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413 | DiffviewWorldChanged, /* worldChangedProc */ |
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414 | }; |
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415 | |
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416 | /* |
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417 | * ------------------------------------------------------------------------ |
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418 | * RpDiffview_Init -- |
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419 | * |
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420 | * Invoked when the Rappture GUI library is being initialized |
---|
421 | * to install the "diffview" widget into the interpreter. |
---|
422 | * |
---|
423 | * Returns TCL_OK if successful, or TCL_ERROR (along with an error |
---|
424 | * message in the interp) if anything goes wrong. |
---|
425 | * ------------------------------------------------------------------------ |
---|
426 | */ |
---|
427 | int |
---|
428 | RpDiffview_Init(interp) |
---|
429 | Tcl_Interp *interp; /* interpreter being initialized */ |
---|
430 | { |
---|
431 | static char *script = "source [file join $RapptureGUI::library scripts diffview.tcl]"; |
---|
432 | |
---|
433 | /* install the widget command */ |
---|
434 | Tcl_CreateObjCommand(interp, "Rappture::Diffview", DiffviewObjCmd, |
---|
435 | NULL, NULL); |
---|
436 | |
---|
437 | /* load the default bindings */ |
---|
438 | if (Tcl_Eval(interp, script) != TCL_OK) { |
---|
439 | return TCL_ERROR; |
---|
440 | } |
---|
441 | |
---|
442 | return TCL_OK; |
---|
443 | } |
---|
444 | |
---|
445 | /* |
---|
446 | * ---------------------------------------------------------------------- |
---|
447 | * DiffviewObjCmd() |
---|
448 | * |
---|
449 | * Called whenever a Diffview object is created to create the widget |
---|
450 | * and install the Tcl access command. |
---|
451 | * ---------------------------------------------------------------------- |
---|
452 | */ |
---|
453 | static int |
---|
454 | DiffviewObjCmd(clientData, interp, objc, objv) |
---|
455 | ClientData clientData; /* not used */ |
---|
456 | Tcl_Interp *interp; /* current interpreter */ |
---|
457 | int objc; /* number of command arguments */ |
---|
458 | Tcl_Obj *CONST objv[]; /* command argument objects */ |
---|
459 | { |
---|
460 | Diffview *dvPtr; |
---|
461 | Tk_Window tkwin; |
---|
462 | |
---|
463 | if (objc < 2) { |
---|
464 | Tcl_WrongNumArgs(interp, 1, objv, "pathName ?options?"); |
---|
465 | return TCL_ERROR; |
---|
466 | } |
---|
467 | |
---|
468 | tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp), |
---|
469 | Tcl_GetString(objv[1]), (char*)NULL); |
---|
470 | |
---|
471 | if (tkwin == NULL) { |
---|
472 | return TCL_ERROR; |
---|
473 | } |
---|
474 | |
---|
475 | /* |
---|
476 | * Create a data structure for the widget objects and set good |
---|
477 | * initial values. |
---|
478 | */ |
---|
479 | dvPtr = (Diffview*)ckalloc(sizeof(Diffview)); |
---|
480 | memset((void*)dvPtr, 0, (sizeof(Diffview))); |
---|
481 | |
---|
482 | dvPtr->tkwin = tkwin; |
---|
483 | dvPtr->display = Tk_Display(tkwin); |
---|
484 | dvPtr->interp = interp; |
---|
485 | dvPtr->widgetCmd = Tcl_CreateObjCommand(interp, |
---|
486 | Tk_PathName(dvPtr->tkwin), DiffviewWidgetObjCmd, |
---|
487 | (ClientData)dvPtr, DiffviewCmdDeletedProc); |
---|
488 | dvPtr->optionTable = Tk_CreateOptionTable(interp, optionSpecs); |
---|
489 | |
---|
490 | dvPtr->buffer[0].textObj = NULL; |
---|
491 | dvPtr->buffer[0].lineLimits = NULL; |
---|
492 | dvPtr->buffer[1].textObj = NULL; |
---|
493 | dvPtr->buffer[1].lineLimits = NULL; |
---|
494 | dvPtr->diffdir = DIFF_1TO2; |
---|
495 | |
---|
496 | dvPtr->cursor = None; |
---|
497 | dvPtr->relief = TK_RELIEF_SUNKEN; |
---|
498 | dvPtr->normGC = None; |
---|
499 | dvPtr->addFgGC = None; |
---|
500 | dvPtr->delFgGC = None; |
---|
501 | dvPtr->chgFgGC = None; |
---|
502 | dvPtr->xScrollUnit = 1; |
---|
503 | dvPtr->yScrollUnit = 1; |
---|
504 | |
---|
505 | /* |
---|
506 | * Use reference counting to decide when this data should be |
---|
507 | * cleaned up. |
---|
508 | */ |
---|
509 | Tcl_Preserve((ClientData) dvPtr->tkwin); |
---|
510 | |
---|
511 | Tk_SetClass(dvPtr->tkwin, "Diffview"); |
---|
512 | Tk_SetClassProcs(dvPtr->tkwin, &diffviewClass, (ClientData)dvPtr); |
---|
513 | |
---|
514 | Tk_CreateEventHandler(dvPtr->tkwin, |
---|
515 | ExposureMask|StructureNotifyMask|FocusChangeMask, |
---|
516 | DiffviewEventProc, (ClientData)dvPtr); |
---|
517 | |
---|
518 | if (Tk_InitOptions(interp, (char*)dvPtr, dvPtr->optionTable, tkwin) |
---|
519 | != TCL_OK) { |
---|
520 | Tk_DestroyWindow(dvPtr->tkwin); |
---|
521 | return TCL_ERROR; |
---|
522 | } |
---|
523 | |
---|
524 | if (ConfigureDiffview(interp, dvPtr, objc-2, objv+2, 0) != TCL_OK) { |
---|
525 | Tk_DestroyWindow(dvPtr->tkwin); |
---|
526 | return TCL_ERROR; |
---|
527 | } |
---|
528 | |
---|
529 | Tcl_SetResult(interp, Tk_PathName(dvPtr->tkwin), TCL_STATIC); |
---|
530 | return TCL_OK; |
---|
531 | } |
---|
532 | |
---|
533 | /* |
---|
534 | * ---------------------------------------------------------------------- |
---|
535 | * DiffviewWidgetObjCmd() |
---|
536 | * |
---|
537 | * Called to process the operations associated with the widget. Handles |
---|
538 | * the widget access command, using the operations defined in the |
---|
539 | * commandNames[] array. |
---|
540 | * ---------------------------------------------------------------------- |
---|
541 | */ |
---|
542 | static int |
---|
543 | DiffviewWidgetObjCmd(clientData, interp, objc, objv) |
---|
544 | ClientData clientData; /* widget data */ |
---|
545 | Tcl_Interp *interp; /* interp handling this command */ |
---|
546 | int objc; /* number of command arguments */ |
---|
547 | Tcl_Obj *CONST objv[]; /* command arguments */ |
---|
548 | { |
---|
549 | Diffview *dvPtr = (Diffview*)clientData; |
---|
550 | int result = TCL_OK; |
---|
551 | int cmdToken; |
---|
552 | |
---|
553 | if (objc < 2) { |
---|
554 | Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?"); |
---|
555 | return TCL_ERROR; |
---|
556 | } |
---|
557 | |
---|
558 | /* |
---|
559 | * Look up the command option and map it to an enumerated value. |
---|
560 | */ |
---|
561 | result = Tcl_GetIndexFromObj(interp, objv[1], commandNames, |
---|
562 | "option", 0, &cmdToken); |
---|
563 | |
---|
564 | if (result != TCL_OK) { |
---|
565 | return result; |
---|
566 | } |
---|
567 | |
---|
568 | /* hang on to the widget data until we exit... */ |
---|
569 | Tcl_Preserve((ClientData)dvPtr); |
---|
570 | |
---|
571 | switch (cmdToken) { |
---|
572 | case COMMAND_BBOX: { |
---|
573 | result = DiffviewBboxSubCmd(interp, dvPtr, objc, objv); |
---|
574 | break; |
---|
575 | } |
---|
576 | |
---|
577 | case COMMAND_CGET: { |
---|
578 | Tcl_Obj *objPtr; |
---|
579 | if (objc != 3) { |
---|
580 | Tcl_WrongNumArgs(interp, 2, objv, "option"); |
---|
581 | result = TCL_ERROR; |
---|
582 | break; |
---|
583 | } |
---|
584 | |
---|
585 | objPtr = Tk_GetOptionValue(interp, (char*)dvPtr, |
---|
586 | dvPtr->optionTable, objv[2], dvPtr->tkwin); |
---|
587 | if (objPtr == NULL) { |
---|
588 | result = TCL_ERROR; |
---|
589 | break; |
---|
590 | } |
---|
591 | Tcl_SetObjResult(interp, objPtr); |
---|
592 | result = TCL_OK; |
---|
593 | break; |
---|
594 | } |
---|
595 | |
---|
596 | case COMMAND_CONFIGURE: { |
---|
597 | Tcl_Obj *objPtr; |
---|
598 | if (objc <= 3) { |
---|
599 | /* query the value of an option */ |
---|
600 | objPtr = Tk_GetOptionInfo(interp, (char*)dvPtr, |
---|
601 | dvPtr->optionTable, |
---|
602 | (objc == 3) ? objv[2] : (Tcl_Obj*)NULL, |
---|
603 | dvPtr->tkwin); |
---|
604 | if (objPtr == NULL) { |
---|
605 | result = TCL_ERROR; |
---|
606 | break; |
---|
607 | } else { |
---|
608 | Tcl_SetObjResult(interp, objPtr); |
---|
609 | result = TCL_OK; |
---|
610 | } |
---|
611 | } else { |
---|
612 | /* set one or more configuration options */ |
---|
613 | result = ConfigureDiffview(interp, dvPtr, objc-2, objv+2, 0); |
---|
614 | } |
---|
615 | break; |
---|
616 | } |
---|
617 | |
---|
618 | case COMMAND_DIFFS: { |
---|
619 | result = DiffviewDiffsSubCmd(interp, dvPtr, objc, objv); |
---|
620 | break; |
---|
621 | } |
---|
622 | |
---|
623 | case COMMAND_SCAN: { |
---|
624 | int x, y, scanCmdIndex; |
---|
625 | |
---|
626 | if (objc != 5) { |
---|
627 | Tcl_WrongNumArgs(interp, 2, objv, "mark|dragto x y"); |
---|
628 | result = TCL_ERROR; |
---|
629 | break; |
---|
630 | } |
---|
631 | |
---|
632 | if (Tcl_GetIntFromObj(interp, objv[3], &x) != TCL_OK |
---|
633 | || Tcl_GetIntFromObj(interp, objv[4], &y) != TCL_OK) { |
---|
634 | result = TCL_ERROR; |
---|
635 | break; |
---|
636 | } |
---|
637 | |
---|
638 | result = Tcl_GetIndexFromObj(interp, objv[2], scanCommandNames, |
---|
639 | "option", 0, &scanCmdIndex); |
---|
640 | if (result != TCL_OK) { |
---|
641 | break; |
---|
642 | } |
---|
643 | switch (scanCmdIndex) { |
---|
644 | case SCAN_MARK: { |
---|
645 | dvPtr->scanMarkX = x; |
---|
646 | dvPtr->scanMarkY = y; |
---|
647 | dvPtr->scanMarkXStart = dvPtr->xOffset; |
---|
648 | dvPtr->scanMarkYStart = dvPtr->yOffset; |
---|
649 | break; |
---|
650 | } |
---|
651 | case SCAN_DRAGTO: { |
---|
652 | DiffviewScanTo(dvPtr, x, y); |
---|
653 | break; |
---|
654 | } |
---|
655 | } |
---|
656 | result = TCL_OK; |
---|
657 | break; |
---|
658 | } |
---|
659 | |
---|
660 | case COMMAND_SEE: { |
---|
661 | DiffviewDiffOp *diffOpPtr; |
---|
662 | int line1, line2, topline; |
---|
663 | |
---|
664 | if (objc != 3) { |
---|
665 | Tcl_WrongNumArgs(interp, 2, objv, "index"); |
---|
666 | result = TCL_ERROR; |
---|
667 | break; |
---|
668 | } |
---|
669 | result = DiffviewGetIndex(interp, dvPtr, objv[2], |
---|
670 | &line1, &diffOpPtr); |
---|
671 | if (result != TCL_OK) { |
---|
672 | break; |
---|
673 | } |
---|
674 | |
---|
675 | if (line1 < 0 && diffOpPtr != NULL) { |
---|
676 | line1 = diffOpPtr->fromWorld; |
---|
677 | line2 = diffOpPtr->toWorld; |
---|
678 | } else { |
---|
679 | line2 = line1; |
---|
680 | } |
---|
681 | |
---|
682 | if (line1 >= dvPtr->worldview.numLines) { |
---|
683 | line1 = line2 = dvPtr->worldview.numLines-1; |
---|
684 | } |
---|
685 | if (line1 < 0) { |
---|
686 | line1 = line2 = 0; |
---|
687 | } |
---|
688 | |
---|
689 | if (line1 < dvPtr->topLine || line1 > dvPtr->btmLine) { |
---|
690 | /* location off screen? then center it in y-view */ |
---|
691 | if (line2-line1 >= dvPtr->fullLines) { |
---|
692 | topline = line1; |
---|
693 | } else { |
---|
694 | topline = (line1+line2)/2 - dvPtr->fullLines/2; |
---|
695 | if (topline < 0) topline = 0; |
---|
696 | } |
---|
697 | ChangeDiffviewView(dvPtr, topline); |
---|
698 | } |
---|
699 | result = TCL_OK; |
---|
700 | break; |
---|
701 | } |
---|
702 | |
---|
703 | case COMMAND_TEXT: { |
---|
704 | result = DiffviewTextSubCmd(interp, dvPtr, objc, objv); |
---|
705 | break; |
---|
706 | } |
---|
707 | |
---|
708 | case COMMAND_XVIEW: { |
---|
709 | result = DiffviewXviewSubCmd(interp, dvPtr, objc, objv); |
---|
710 | break; |
---|
711 | } |
---|
712 | |
---|
713 | case COMMAND_YVIEW: { |
---|
714 | result = DiffviewYviewSubCmd(interp, dvPtr, objc, objv); |
---|
715 | break; |
---|
716 | } |
---|
717 | } |
---|
718 | |
---|
719 | /* okay, release the widget data and return */ |
---|
720 | Tcl_Release((ClientData)dvPtr); |
---|
721 | return result; |
---|
722 | } |
---|
723 | |
---|
724 | /* |
---|
725 | * ---------------------------------------------------------------------- |
---|
726 | * DiffviewBboxSubCmd() |
---|
727 | * |
---|
728 | * Handles the "bbox" operation on the widget. Returns a bounding |
---|
729 | * box for the specified part of the widget. |
---|
730 | * ---------------------------------------------------------------------- |
---|
731 | */ |
---|
732 | static int |
---|
733 | DiffviewBboxSubCmd(interp, dvPtr, objc, objv) |
---|
734 | Tcl_Interp *interp; /* interp handling this command */ |
---|
735 | Diffview *dvPtr; /* widget data */ |
---|
736 | int objc; /* number of command arguments */ |
---|
737 | Tcl_Obj *CONST objv[]; /* command arguments */ |
---|
738 | { |
---|
739 | char *opt, buf[256]; |
---|
740 | DiffviewDiffOp *diffOpPtr; |
---|
741 | int line, bnum, bline, x1, y0, y1, wd; |
---|
742 | char *textPtr; int textLen; |
---|
743 | |
---|
744 | if (objc != 3) { |
---|
745 | Tcl_WrongNumArgs(interp, 2, objv, "index"); |
---|
746 | return TCL_ERROR; |
---|
747 | } |
---|
748 | |
---|
749 | /* make sure that our layout info is up to date for queries below */ |
---|
750 | DiffviewUpdateLayout(dvPtr); |
---|
751 | |
---|
752 | opt = Tcl_GetString(objv[2]); |
---|
753 | if (*opt == 'a' && strcmp(opt,"all") == 0) { |
---|
754 | sprintf(buf, "0 0 %d %d", dvPtr->maxWidth, dvPtr->maxHeight); |
---|
755 | Tcl_SetResult(interp, buf, TCL_VOLATILE); |
---|
756 | return TCL_OK; |
---|
757 | } |
---|
758 | |
---|
759 | if (DiffviewGetIndex(interp, dvPtr, objv[2], &line, &diffOpPtr) != TCL_OK) { |
---|
760 | Tcl_AppendResult(interp, " or all", (char*)NULL); |
---|
761 | return TCL_ERROR; |
---|
762 | } |
---|
763 | |
---|
764 | /* return the bounding box for a line in world coords */ |
---|
765 | if (line >= 0) { |
---|
766 | y0 = line*dvPtr->lineHeight; |
---|
767 | y1 = (line+1)*dvPtr->lineHeight; |
---|
768 | x1 = 0; |
---|
769 | if (line < dvPtr->worldview.numLines) { |
---|
770 | bnum = dvPtr->worldview.lines[line].bnum; |
---|
771 | bline = dvPtr->worldview.lines[line].bline; |
---|
772 | if (bline >= 0) { |
---|
773 | textPtr = dvPtr->buffer[bnum].lineLimits->startPtr[bline]; |
---|
774 | textLen = dvPtr->buffer[bnum].lineLimits->lenPtr[bline]; |
---|
775 | x1 = Tk_TextWidth(dvPtr->tkfont, textPtr, textLen); |
---|
776 | } |
---|
777 | } |
---|
778 | sprintf(buf, "0 %d %d %d", y0, x1, y1); |
---|
779 | Tcl_SetResult(interp, buf, TCL_VOLATILE); |
---|
780 | return TCL_OK; |
---|
781 | } |
---|
782 | |
---|
783 | /* return the bounding box for a diff in world coords */ |
---|
784 | if (diffOpPtr) { |
---|
785 | y0 = diffOpPtr->fromWorld*dvPtr->lineHeight; |
---|
786 | y1 = (diffOpPtr->toWorld+1)*dvPtr->lineHeight; |
---|
787 | x1 = 0; |
---|
788 | |
---|
789 | for (line=diffOpPtr->fromWorld; line <= diffOpPtr->toWorld; line++) { |
---|
790 | if (line < dvPtr->worldview.numLines) { |
---|
791 | bnum = dvPtr->worldview.lines[line].bnum; |
---|
792 | bline = dvPtr->worldview.lines[line].bline; |
---|
793 | if (bline >= 0) { |
---|
794 | textPtr = dvPtr->buffer[bnum].lineLimits->startPtr[bline]; |
---|
795 | textLen = dvPtr->buffer[bnum].lineLimits->lenPtr[bline]; |
---|
796 | wd = Tk_TextWidth(dvPtr->tkfont, textPtr, textLen); |
---|
797 | if (wd > x1) { |
---|
798 | x1 = wd; |
---|
799 | } |
---|
800 | } |
---|
801 | } |
---|
802 | } |
---|
803 | sprintf(buf, "0 %d %d %d", y0, x1, y1); |
---|
804 | Tcl_SetResult(interp, buf, TCL_VOLATILE); |
---|
805 | } |
---|
806 | return TCL_OK; |
---|
807 | } |
---|
808 | |
---|
809 | /* |
---|
810 | * ---------------------------------------------------------------------- |
---|
811 | * DiffviewDiffsSubCmd() |
---|
812 | * |
---|
813 | * Handles the "diffs" operation on the widget with the following |
---|
814 | * syntax: |
---|
815 | * |
---|
816 | * widget diffs ?-std|-debug|-number? |
---|
817 | * |
---|
818 | * The default is "diffs -std", which returns the usual output from |
---|
819 | * the Unix "diff" command. The -debug option returns a more detailed |
---|
820 | * output that is useful for testing/debugging. The -number option |
---|
821 | * returns the total number of diffs. This is useful for commands |
---|
822 | * such as "see #2", where you can bring a particular diff into view. |
---|
823 | * ---------------------------------------------------------------------- |
---|
824 | */ |
---|
825 | static int |
---|
826 | DiffviewDiffsSubCmd(interp, dvPtr, objc, objv) |
---|
827 | Tcl_Interp *interp; /* interp handling this command */ |
---|
828 | Diffview *dvPtr; /* widget data */ |
---|
829 | int objc; /* number of command arguments */ |
---|
830 | Tcl_Obj *CONST objv[]; /* command arguments */ |
---|
831 | { |
---|
832 | Tcl_Obj *resultPtr; |
---|
833 | char range1[128], range2[128]; |
---|
834 | int i, n; |
---|
835 | |
---|
836 | static CONST char *options[] = { |
---|
837 | "-std", "-debug", "-number", (char*)NULL |
---|
838 | }; |
---|
839 | enum options { |
---|
840 | DIFFS_STD, DIFFS_DEBUG, DIFFS_NUMBER |
---|
841 | }; |
---|
842 | int op = DIFFS_STD; |
---|
843 | |
---|
844 | |
---|
845 | if (objc > 3) { |
---|
846 | Tcl_WrongNumArgs(interp, 2, objv, "?-std? ?-debug? ?-number?"); |
---|
847 | return TCL_ERROR; |
---|
848 | } |
---|
849 | |
---|
850 | /* decode the option that controls the return result */ |
---|
851 | if (objc > 2) { |
---|
852 | if (Tcl_GetIndexFromObj(interp, objv[2], options, "option", 0, |
---|
853 | &op) != TCL_OK) { |
---|
854 | return TCL_ERROR; |
---|
855 | } |
---|
856 | } |
---|
857 | |
---|
858 | /* make sure that our layout info is up to date for queries below */ |
---|
859 | DiffviewUpdateLayout(dvPtr); |
---|
860 | |
---|
861 | switch ((enum options)op) { |
---|
862 | case DIFFS_STD: { |
---|
863 | DiffviewDiffOp curr, *currOpPtr; |
---|
864 | DiffviewLines *lines1, *lines2; |
---|
865 | |
---|
866 | if (dvPtr->diffsPtr) { |
---|
867 | resultPtr = Tcl_GetObjResult(interp); |
---|
868 | for (i=0; i < dvPtr->diffsPtr->numDiffs; i++) { |
---|
869 | currOpPtr = &dvPtr->diffsPtr->ops[i]; |
---|
870 | |
---|
871 | /* if we're diff'ing the other way, reverse the diff */ |
---|
872 | if (dvPtr->diffdir == DIFF_1TO2) { |
---|
873 | memcpy((VOID*)&curr, (VOID*)currOpPtr, |
---|
874 | sizeof(DiffviewDiffOp)); |
---|
875 | lines1 = dvPtr->buffer[0].lineLimits; |
---|
876 | lines2 = dvPtr->buffer[1].lineLimits; |
---|
877 | } else { |
---|
878 | switch (currOpPtr->op) { |
---|
879 | case 'a': curr.op = 'd'; break; |
---|
880 | case 'd': curr.op = 'a'; break; |
---|
881 | default: curr.op = currOpPtr->op; break; |
---|
882 | } |
---|
883 | curr.fromIndex1 = currOpPtr->fromIndex2; |
---|
884 | curr.toIndex1 = currOpPtr->toIndex2; |
---|
885 | curr.fromIndex2 = currOpPtr->fromIndex1; |
---|
886 | curr.toIndex2 = currOpPtr->toIndex1; |
---|
887 | lines1 = dvPtr->buffer[1].lineLimits; |
---|
888 | lines2 = dvPtr->buffer[0].lineLimits; |
---|
889 | } |
---|
890 | |
---|
891 | /* append the diff info onto the output */ |
---|
892 | if (curr.fromIndex1 == curr.toIndex1) { |
---|
893 | if (curr.op == 'a') { |
---|
894 | /* for append, use first index at raw value */ |
---|
895 | sprintf(range1, "%d", curr.fromIndex1); |
---|
896 | } else { |
---|
897 | sprintf(range1, "%d", curr.fromIndex1+1); |
---|
898 | } |
---|
899 | } else { |
---|
900 | sprintf(range1, "%d,%d", curr.fromIndex1+1, |
---|
901 | curr.toIndex1+1); |
---|
902 | } |
---|
903 | |
---|
904 | if (curr.fromIndex2 == curr.toIndex2) { |
---|
905 | if (curr.op == 'd') { |
---|
906 | /* for delete, use second index at raw value */ |
---|
907 | sprintf(range2, "%d", curr.fromIndex2); |
---|
908 | } else { |
---|
909 | sprintf(range2, "%d", curr.fromIndex2+1); |
---|
910 | } |
---|
911 | } else { |
---|
912 | sprintf(range2, "%d,%d", curr.fromIndex2+1, |
---|
913 | curr.toIndex2+1); |
---|
914 | } |
---|
915 | |
---|
916 | switch (curr.op) { |
---|
917 | case 'a': { |
---|
918 | Tcl_AppendToObj(resultPtr, range1, -1); |
---|
919 | Tcl_AppendToObj(resultPtr, "a", 1); |
---|
920 | Tcl_AppendToObj(resultPtr, range2, -1); |
---|
921 | Tcl_AppendToObj(resultPtr, "\n", 1); |
---|
922 | for (n=curr.fromIndex2; n <= curr.toIndex2; n++) { |
---|
923 | Tcl_AppendToObj(resultPtr, "> ", 2); |
---|
924 | Tcl_AppendToObj(resultPtr, lines2->startPtr[n], |
---|
925 | lines2->lenPtr[n]); |
---|
926 | Tcl_AppendToObj(resultPtr, "\n", 1); |
---|
927 | } |
---|
928 | break; |
---|
929 | } |
---|
930 | case 'd': { |
---|
931 | Tcl_AppendToObj(resultPtr, range1, -1); |
---|
932 | Tcl_AppendToObj(resultPtr, "d", 1); |
---|
933 | Tcl_AppendToObj(resultPtr, range2, -1); |
---|
934 | Tcl_AppendToObj(resultPtr, "\n", 1); |
---|
935 | for (n=curr.fromIndex1; n <= curr.toIndex1; n++) { |
---|
936 | Tcl_AppendToObj(resultPtr, "< ", 2); |
---|
937 | Tcl_AppendToObj(resultPtr, lines1->startPtr[n], |
---|
938 | lines1->lenPtr[n]); |
---|
939 | Tcl_AppendToObj(resultPtr, "\n", 1); |
---|
940 | } |
---|
941 | break; |
---|
942 | } |
---|
943 | case 'c': { |
---|
944 | Tcl_AppendToObj(resultPtr, range1, -1); |
---|
945 | Tcl_AppendToObj(resultPtr, "c", 1); |
---|
946 | Tcl_AppendToObj(resultPtr, range2, -1); |
---|
947 | Tcl_AppendToObj(resultPtr, "\n", 1); |
---|
948 | for (n=curr.fromIndex1; n <= curr.toIndex1; n++) { |
---|
949 | Tcl_AppendToObj(resultPtr, "< ", 2); |
---|
950 | Tcl_AppendToObj(resultPtr, lines1->startPtr[n], |
---|
951 | lines1->lenPtr[n]); |
---|
952 | Tcl_AppendToObj(resultPtr, "\n", 1); |
---|
953 | } |
---|
954 | Tcl_AppendToObj(resultPtr, "---\n", 4); |
---|
955 | for (n=curr.fromIndex2; n <= curr.toIndex2; n++) { |
---|
956 | Tcl_AppendToObj(resultPtr, "> ", 2); |
---|
957 | Tcl_AppendToObj(resultPtr, lines2->startPtr[n], |
---|
958 | lines2->lenPtr[n]); |
---|
959 | Tcl_AppendToObj(resultPtr, "\n", 1); |
---|
960 | } |
---|
961 | break; |
---|
962 | } |
---|
963 | } |
---|
964 | } |
---|
965 | } |
---|
966 | break; |
---|
967 | } |
---|
968 | case DIFFS_DEBUG: { |
---|
969 | DiffviewDiffOp *c; |
---|
970 | char elem[256]; |
---|
971 | |
---|
972 | if (dvPtr->diffsPtr) { |
---|
973 | for (i=0; i < dvPtr->diffsPtr->numDiffs; i++) { |
---|
974 | c = &dvPtr->diffsPtr->ops[i]; |
---|
975 | |
---|
976 | /* append the diff info onto the output */ |
---|
977 | if (c->fromIndex1 == c->toIndex1) { |
---|
978 | sprintf(range1, "%d", c->fromIndex1); |
---|
979 | } else { |
---|
980 | sprintf(range1, "%d,%d", c->fromIndex1, c->toIndex1); |
---|
981 | } |
---|
982 | |
---|
983 | if (c->fromIndex2 == c->toIndex2) { |
---|
984 | sprintf(range2, "%d", c->fromIndex2); |
---|
985 | } else { |
---|
986 | sprintf(range2, "%d,%d", c->fromIndex2, c->toIndex2); |
---|
987 | } |
---|
988 | |
---|
989 | sprintf(elem, "%c %s %s", c->op, range1, range2); |
---|
990 | Tcl_AppendElement(interp, elem); |
---|
991 | } |
---|
992 | } |
---|
993 | break; |
---|
994 | } |
---|
995 | case DIFFS_NUMBER: { |
---|
996 | int num = 0; |
---|
997 | if (dvPtr->diffsPtr) { |
---|
998 | num = dvPtr->diffsPtr->numDiffs; |
---|
999 | } |
---|
1000 | resultPtr = Tcl_NewIntObj(num); |
---|
1001 | Tcl_SetObjResult(interp, resultPtr); |
---|
1002 | break; |
---|
1003 | } |
---|
1004 | } |
---|
1005 | return TCL_OK; |
---|
1006 | } |
---|
1007 | |
---|
1008 | /* |
---|
1009 | * ---------------------------------------------------------------------- |
---|
1010 | * DiffviewTextSubCmd() |
---|
1011 | * |
---|
1012 | * Handles the "text" operation on the widget with the following |
---|
1013 | * syntax: |
---|
1014 | * |
---|
1015 | * widget text 1 ?string? |
---|
1016 | * widget text 2 ?string? |
---|
1017 | * |
---|
1018 | * Used to get/set the text being diff'd and displayed in the widget. |
---|
1019 | * ---------------------------------------------------------------------- |
---|
1020 | */ |
---|
1021 | static int |
---|
1022 | DiffviewTextSubCmd(interp, dvPtr, objc, objv) |
---|
1023 | Tcl_Interp *interp; /* interp handling this command */ |
---|
1024 | Diffview *dvPtr; /* widget data */ |
---|
1025 | int objc; /* number of command arguments */ |
---|
1026 | Tcl_Obj *CONST objv[]; /* command arguments */ |
---|
1027 | { |
---|
1028 | int bufferNum; |
---|
1029 | DiffviewBuffer *slotPtr; |
---|
1030 | |
---|
1031 | if (objc < 2 || objc > 4) { |
---|
1032 | Tcl_WrongNumArgs(interp, 2, objv, "bufferNum ?string?"); |
---|
1033 | return TCL_ERROR; |
---|
1034 | } |
---|
1035 | |
---|
1036 | /* decode the buffer number -- right now only buffers 1 & 2 */ |
---|
1037 | if (Tcl_GetIntFromObj(interp, objv[2], &bufferNum) != TCL_OK) { |
---|
1038 | return TCL_ERROR; |
---|
1039 | } |
---|
1040 | if (bufferNum < 1 || bufferNum > 2) { |
---|
1041 | Tcl_AppendResult(interp, "bad buffer number \"", |
---|
1042 | Tcl_GetString(objv[2]), "\": should be 1 or 2", |
---|
1043 | (char*)NULL); |
---|
1044 | return TCL_ERROR; |
---|
1045 | } |
---|
1046 | slotPtr = &dvPtr->buffer[bufferNum-1]; |
---|
1047 | |
---|
1048 | if (objc == 3) { |
---|
1049 | /* return current contents of the buffer */ |
---|
1050 | if (slotPtr->textObj != NULL) { |
---|
1051 | Tcl_SetObjResult(interp, slotPtr->textObj); |
---|
1052 | } else { |
---|
1053 | Tcl_ResetResult(interp); |
---|
1054 | } |
---|
1055 | return TCL_OK; |
---|
1056 | } |
---|
1057 | |
---|
1058 | /* set and return the new contents of the buffer */ |
---|
1059 | if (slotPtr->textObj != NULL) { |
---|
1060 | Tcl_DecrRefCount(slotPtr->textObj); |
---|
1061 | DiffviewLinesFree(slotPtr->lineLimits); |
---|
1062 | slotPtr->lineLimits = NULL; |
---|
1063 | } |
---|
1064 | slotPtr->textObj = objv[3]; |
---|
1065 | Tcl_IncrRefCount(slotPtr->textObj); |
---|
1066 | |
---|
1067 | EventuallyRedraw(dvPtr); |
---|
1068 | |
---|
1069 | Tcl_SetObjResult(interp, slotPtr->textObj); |
---|
1070 | return TCL_OK; |
---|
1071 | } |
---|
1072 | |
---|
1073 | /* |
---|
1074 | * ---------------------------------------------------------------------- |
---|
1075 | * DiffviewXviewSubCmd() |
---|
1076 | * |
---|
1077 | * Handles the "xview" operation on the widget. Adjusts the x-axis view |
---|
1078 | * according to some request, which usually comes from a scrollbar. |
---|
1079 | * Supports the standard Tk operations for "xview". |
---|
1080 | * ---------------------------------------------------------------------- |
---|
1081 | */ |
---|
1082 | static int |
---|
1083 | DiffviewXviewSubCmd(interp, dvPtr, objc, objv) |
---|
1084 | Tcl_Interp *interp; /* interp handling this command */ |
---|
1085 | Diffview *dvPtr; /* widget data */ |
---|
1086 | int objc; /* number of command arguments */ |
---|
1087 | Tcl_Obj *CONST objv[]; /* command arguments */ |
---|
1088 | { |
---|
1089 | |
---|
1090 | int offset = 0; |
---|
1091 | int index, count, type, viewWidth, windowUnits, maxOffset; |
---|
1092 | double fraction, fraction2; |
---|
1093 | |
---|
1094 | viewWidth = Tk_Width(dvPtr->tkwin) - 2*dvPtr->inset; |
---|
1095 | |
---|
1096 | if (objc == 2) { |
---|
1097 | /* |
---|
1098 | * COMMAND: widget xview |
---|
1099 | * return current limits as fractions 0-1 |
---|
1100 | */ |
---|
1101 | if (dvPtr->maxWidth == 0) { |
---|
1102 | Tcl_SetResult(interp, "0 1", TCL_STATIC); |
---|
1103 | } else { |
---|
1104 | char buf[TCL_DOUBLE_SPACE*2+2]; |
---|
1105 | |
---|
1106 | fraction = dvPtr->xOffset/((double)dvPtr->maxWidth); |
---|
1107 | fraction2 = (dvPtr->xOffset + viewWidth) |
---|
1108 | /((double)dvPtr->maxWidth); |
---|
1109 | if (fraction2 > 1.0) { |
---|
1110 | fraction2 = 1.0; |
---|
1111 | } |
---|
1112 | sprintf(buf, "%g %g", fraction, fraction2); |
---|
1113 | Tcl_SetResult(interp, buf, TCL_VOLATILE); |
---|
1114 | } |
---|
1115 | } else { |
---|
1116 | if (objc == 3) { |
---|
1117 | /* |
---|
1118 | * COMMAND: widget xview index |
---|
1119 | * set left edge to character at index |
---|
1120 | */ |
---|
1121 | if (Tcl_GetIntFromObj(interp, objv[2], &index) != TCL_OK) { |
---|
1122 | return TCL_ERROR; |
---|
1123 | } |
---|
1124 | offset = index*dvPtr->xScrollUnit; |
---|
1125 | } else { |
---|
1126 | /* |
---|
1127 | * COMMAND: widget xview moveto fraction |
---|
1128 | * COMMAND: widget xview scroll number what |
---|
1129 | * handles more complex scrolling movements |
---|
1130 | */ |
---|
1131 | type = Tk_GetScrollInfoObj(interp, objc, objv, &fraction, &count); |
---|
1132 | switch (type) { |
---|
1133 | case TK_SCROLL_ERROR: |
---|
1134 | return TCL_ERROR; |
---|
1135 | case TK_SCROLL_MOVETO: |
---|
1136 | offset = (int)(fraction*dvPtr->maxWidth + 0.5); |
---|
1137 | break; |
---|
1138 | case TK_SCROLL_PAGES: |
---|
1139 | windowUnits = viewWidth/dvPtr->xScrollUnit; |
---|
1140 | if (windowUnits > 2) { |
---|
1141 | offset = dvPtr->xOffset |
---|
1142 | + count*dvPtr->xScrollUnit*(windowUnits-2); |
---|
1143 | } else { |
---|
1144 | offset = dvPtr->xOffset + count*dvPtr->xScrollUnit; |
---|
1145 | } |
---|
1146 | break; |
---|
1147 | case TK_SCROLL_UNITS: |
---|
1148 | offset = dvPtr->xOffset + count*dvPtr->xScrollUnit; |
---|
1149 | break; |
---|
1150 | } |
---|
1151 | } |
---|
1152 | maxOffset = dvPtr->maxWidth |
---|
1153 | - (Tk_Width(dvPtr->tkwin) - 2*dvPtr->inset) |
---|
1154 | + (dvPtr->xScrollUnit - 1); |
---|
1155 | if (offset > maxOffset) { offset = maxOffset; } |
---|
1156 | if (offset < 0) { offset = 0; } |
---|
1157 | |
---|
1158 | /* nudge back to an even boundary */ |
---|
1159 | offset -= offset % dvPtr->xScrollUnit; |
---|
1160 | |
---|
1161 | if (offset != dvPtr->xOffset) { |
---|
1162 | dvPtr->xOffset = offset; |
---|
1163 | dvPtr->flags |= UPDATE_H_SCROLLBAR; |
---|
1164 | EventuallyRedraw(dvPtr); |
---|
1165 | } |
---|
1166 | } |
---|
1167 | return TCL_OK; |
---|
1168 | } |
---|
1169 | |
---|
1170 | /* |
---|
1171 | * ---------------------------------------------------------------------- |
---|
1172 | * DiffviewYviewSubCmd() |
---|
1173 | * |
---|
1174 | * Handles the "yview" operation on the widget. Adjusts the y-axis view |
---|
1175 | * according to some request, which usually comes from a scrollbar. |
---|
1176 | * Supports the standard Tk operations for "yview". |
---|
1177 | * ---------------------------------------------------------------------- |
---|
1178 | */ |
---|
1179 | static int |
---|
1180 | DiffviewYviewSubCmd(interp, dvPtr, objc, objv) |
---|
1181 | Tcl_Interp *interp; /* interp handling this command */ |
---|
1182 | Diffview *dvPtr; /* widget data */ |
---|
1183 | int objc; /* number of command arguments */ |
---|
1184 | Tcl_Obj *CONST objv[]; /* command arguments */ |
---|
1185 | { |
---|
1186 | int index, yLines, count, type; |
---|
1187 | double fraction, fraction2; |
---|
1188 | |
---|
1189 | /* make sure that our layout info is up to date */ |
---|
1190 | DiffviewUpdateLayout(dvPtr); |
---|
1191 | |
---|
1192 | if (objc == 2) { |
---|
1193 | /* |
---|
1194 | * COMMAND: widget yview |
---|
1195 | * return current limits as fractions 0-1 |
---|
1196 | */ |
---|
1197 | if (dvPtr->maxHeight == 0) { |
---|
1198 | Tcl_SetResult(interp, "0 1", TCL_STATIC); |
---|
1199 | } else { |
---|
1200 | char buf[TCL_DOUBLE_SPACE * 2+2]; |
---|
1201 | |
---|
1202 | yLines = dvPtr->maxHeight/dvPtr->lineHeight; |
---|
1203 | fraction = dvPtr->topLine/((double)yLines); |
---|
1204 | fraction2 = (dvPtr->topLine+dvPtr->fullLines)/((double)yLines); |
---|
1205 | if (fraction2 > 1.0) { |
---|
1206 | fraction2 = 1.0; |
---|
1207 | } |
---|
1208 | sprintf(buf, "%g %g", fraction, fraction2); |
---|
1209 | Tcl_SetResult(interp, buf, TCL_VOLATILE); |
---|
1210 | } |
---|
1211 | } else if (objc == 3) { |
---|
1212 | /* |
---|
1213 | * COMMAND: widget yview index |
---|
1214 | * set top edge to line at index |
---|
1215 | */ |
---|
1216 | if (Tcl_GetIntFromObj(interp, objv[2], &index) != TCL_OK) { |
---|
1217 | return TCL_ERROR; |
---|
1218 | } |
---|
1219 | ChangeDiffviewView(dvPtr, index); |
---|
1220 | } else { |
---|
1221 | /* |
---|
1222 | * COMMAND: widget yview moveto fraction |
---|
1223 | * COMMAND: widget yview scroll number what |
---|
1224 | * handles more complex scrolling movements |
---|
1225 | */ |
---|
1226 | type = Tk_GetScrollInfoObj(interp, objc, objv, &fraction, &count); |
---|
1227 | switch (type) { |
---|
1228 | case TK_SCROLL_ERROR: |
---|
1229 | return TCL_ERROR; |
---|
1230 | case TK_SCROLL_MOVETO: |
---|
1231 | yLines = dvPtr->maxHeight/dvPtr->lineHeight; |
---|
1232 | index = (int)(yLines*fraction + 0.5); |
---|
1233 | break; |
---|
1234 | case TK_SCROLL_PAGES: |
---|
1235 | yLines = dvPtr->maxHeight/dvPtr->lineHeight; |
---|
1236 | if (dvPtr->fullLines > 2) { |
---|
1237 | index = dvPtr->topLine + count*(dvPtr->fullLines-2); |
---|
1238 | } else { |
---|
1239 | index = dvPtr->topLine + count; |
---|
1240 | } |
---|
1241 | break; |
---|
1242 | case TK_SCROLL_UNITS: |
---|
1243 | index = dvPtr->topLine + count; |
---|
1244 | break; |
---|
1245 | } |
---|
1246 | ChangeDiffviewView(dvPtr, index); |
---|
1247 | } |
---|
1248 | return TCL_OK; |
---|
1249 | } |
---|
1250 | |
---|
1251 | /* |
---|
1252 | * ---------------------------------------------------------------------- |
---|
1253 | * DiffviewGetIndex() |
---|
1254 | * |
---|
1255 | * Used by many of the widget operations to parse an index into the |
---|
1256 | * widget view. Handles the following syntax: |
---|
1257 | * #NN ...... particular diff number, starting from 1 |
---|
1258 | * NN ....... particular line number in world view, starting from 0 |
---|
1259 | * |
---|
1260 | * Returns TCL_OK if successful, and TCL_ERROR (along with an error |
---|
1261 | * message) if anything goes wrong. |
---|
1262 | * ---------------------------------------------------------------------- |
---|
1263 | */ |
---|
1264 | static int |
---|
1265 | DiffviewGetIndex(interp, dvPtr, objPtr, linePtr, diffOpPtrPtr) |
---|
1266 | Tcl_Interp *interp; /* interp handling this command */ |
---|
1267 | Diffview *dvPtr; /* widget data */ |
---|
1268 | Tcl_Obj *objPtr; /* argument being parsed */ |
---|
1269 | int *linePtr; /* returns: line number or -1 */ |
---|
1270 | DiffviewDiffOp **diffOpPtrPtr; /* returns: specific diff or NULL */ |
---|
1271 | { |
---|
1272 | int result = TCL_OK; |
---|
1273 | char *opt = Tcl_GetString(objPtr); |
---|
1274 | char *tail; |
---|
1275 | int dnum; |
---|
1276 | |
---|
1277 | /* clear the return values */ |
---|
1278 | if (linePtr) *linePtr = -1; |
---|
1279 | if (diffOpPtrPtr) *diffOpPtrPtr = NULL; |
---|
1280 | |
---|
1281 | if (*opt == '#') { |
---|
1282 | dnum = strtol(opt+1, &tail, 10); |
---|
1283 | if (*tail != '\0' || dnum <= 0) { |
---|
1284 | result = TCL_ERROR; |
---|
1285 | } |
---|
1286 | else if (dvPtr->diffsPtr == NULL |
---|
1287 | || dnum > dvPtr->diffsPtr->numDiffs) { |
---|
1288 | Tcl_AppendResult(interp, "diff \"", opt, "\" doesn't exist", |
---|
1289 | (char*)NULL); |
---|
1290 | return TCL_ERROR; |
---|
1291 | } |
---|
1292 | *diffOpPtrPtr = &dvPtr->diffsPtr->ops[dnum-1]; |
---|
1293 | } else { |
---|
1294 | result = Tcl_GetIntFromObj(interp, objPtr, linePtr); |
---|
1295 | } |
---|
1296 | |
---|
1297 | if (result != TCL_OK) { |
---|
1298 | Tcl_ResetResult(interp); |
---|
1299 | Tcl_AppendResult(interp, "bad index \"", opt, "\": should be " |
---|
1300 | "\"#n\" for diff, or an integer value for line number", |
---|
1301 | (char*)NULL); |
---|
1302 | } |
---|
1303 | return result; |
---|
1304 | } |
---|
1305 | |
---|
1306 | /* |
---|
1307 | * ---------------------------------------------------------------------- |
---|
1308 | * DestroyDiffview() |
---|
1309 | * |
---|
1310 | * Used by Tcl_Release/Tcl_EventuallyFree to clean up the data associated |
---|
1311 | * with a widget when it is no longer being used. This happens at the |
---|
1312 | * end of a widget destruction sequence. |
---|
1313 | * ---------------------------------------------------------------------- |
---|
1314 | */ |
---|
1315 | static void |
---|
1316 | DestroyDiffview(memPtr) |
---|
1317 | char *memPtr; /* widget data */ |
---|
1318 | { |
---|
1319 | Diffview *dvPtr = (Diffview*)memPtr; |
---|
1320 | int bnum; |
---|
1321 | |
---|
1322 | /* |
---|
1323 | * Clean up text associated with the diffs. |
---|
1324 | */ |
---|
1325 | for (bnum=0; bnum < 2; bnum++) { |
---|
1326 | if (dvPtr->buffer[bnum].textObj != NULL) { |
---|
1327 | Tcl_DecrRefCount(dvPtr->buffer[bnum].textObj); |
---|
1328 | } |
---|
1329 | if (dvPtr->buffer[bnum].lineLimits != NULL) { |
---|
1330 | DiffviewLinesFree(dvPtr->buffer[bnum].lineLimits); |
---|
1331 | } |
---|
1332 | } |
---|
1333 | |
---|
1334 | if (dvPtr->diffsPtr) { |
---|
1335 | DiffviewDiffsFree(dvPtr->diffsPtr); |
---|
1336 | } |
---|
1337 | DiffviewLayoutFree(&dvPtr->worldview); |
---|
1338 | |
---|
1339 | /* |
---|
1340 | * Free up GCs and configuration options. |
---|
1341 | */ |
---|
1342 | if (dvPtr->normGC != None) { |
---|
1343 | Tk_FreeGC(dvPtr->display, dvPtr->normGC); |
---|
1344 | } |
---|
1345 | if (dvPtr->addFgGC != None) { |
---|
1346 | Tk_FreeGC(dvPtr->display, dvPtr->addFgGC); |
---|
1347 | } |
---|
1348 | if (dvPtr->delFgGC != None) { |
---|
1349 | Tk_FreeGC(dvPtr->display, dvPtr->delFgGC); |
---|
1350 | } |
---|
1351 | if (dvPtr->chgFgGC != None) { |
---|
1352 | Tk_FreeGC(dvPtr->display, dvPtr->chgFgGC); |
---|
1353 | } |
---|
1354 | |
---|
1355 | Tk_FreeConfigOptions((char*)dvPtr, dvPtr->optionTable, dvPtr->tkwin); |
---|
1356 | Tcl_Release((ClientData) dvPtr->tkwin); |
---|
1357 | dvPtr->tkwin = NULL; |
---|
1358 | ckfree((char*)dvPtr); |
---|
1359 | } |
---|
1360 | |
---|
1361 | /* |
---|
1362 | * ---------------------------------------------------------------------- |
---|
1363 | * ConfigureDiffview() |
---|
1364 | * |
---|
1365 | * Takes a list of configuration options in objc/objv format and applies |
---|
1366 | * the settings to the widget. This is the underlying "configure" |
---|
1367 | * operation for the widget. |
---|
1368 | * ---------------------------------------------------------------------- |
---|
1369 | */ |
---|
1370 | static int |
---|
1371 | ConfigureDiffview(interp, dvPtr, objc, objv, flags) |
---|
1372 | Tcl_Interp *interp; /* interp handling this command */ |
---|
1373 | Diffview *dvPtr; /* widget data */ |
---|
1374 | int objc; /* number of configuration option words */ |
---|
1375 | Tcl_Obj *CONST objv[]; /* configuration option words */ |
---|
1376 | int flags; /* flags for Tk_ConfigureWidget */ |
---|
1377 | { |
---|
1378 | Tcl_Obj *errorResult = NULL; |
---|
1379 | int status; |
---|
1380 | Tk_SavedOptions savedOptions; |
---|
1381 | |
---|
1382 | status = Tk_SetOptions(interp, (char*)dvPtr, dvPtr->optionTable, |
---|
1383 | objc, objv, dvPtr->tkwin, &savedOptions, (int*)NULL); |
---|
1384 | |
---|
1385 | if (status != TCL_OK) { |
---|
1386 | errorResult = Tcl_GetObjResult(interp); |
---|
1387 | Tcl_IncrRefCount(errorResult); |
---|
1388 | Tk_RestoreSavedOptions(&savedOptions); |
---|
1389 | |
---|
1390 | Tcl_SetObjResult(interp, errorResult); |
---|
1391 | Tcl_DecrRefCount(errorResult); |
---|
1392 | return TCL_ERROR; |
---|
1393 | } |
---|
1394 | |
---|
1395 | /* |
---|
1396 | * Fix up the widget to react to any new configuration values. |
---|
1397 | */ |
---|
1398 | Tk_SetBackgroundFromBorder(dvPtr->tkwin, dvPtr->normalBorder); |
---|
1399 | |
---|
1400 | if (dvPtr->highlightWidth < 0) { |
---|
1401 | dvPtr->highlightWidth = 0; |
---|
1402 | } |
---|
1403 | dvPtr->inset = dvPtr->highlightWidth + dvPtr->borderWidth; |
---|
1404 | |
---|
1405 | if (dvPtr->tklastfont != dvPtr->tkfont) { |
---|
1406 | /* the font changed, so re-measure everything */ |
---|
1407 | dvPtr->flags |= FONT_CHANGED; |
---|
1408 | dvPtr->tklastfont = dvPtr->tkfont; |
---|
1409 | } |
---|
1410 | |
---|
1411 | Tk_FreeSavedOptions(&savedOptions); |
---|
1412 | |
---|
1413 | DiffviewWorldChanged((ClientData)dvPtr); |
---|
1414 | return TCL_OK; |
---|
1415 | } |
---|
1416 | |
---|
1417 | /* |
---|
1418 | * ---------------------------------------------------------------------- |
---|
1419 | * DiffviewWorldChanged() |
---|
1420 | * |
---|
1421 | * Called by Tk when the world has changed in some way that causes |
---|
1422 | * all GCs and other things to be recomputed. Reinitializes the |
---|
1423 | * widget and gets it ready to draw. |
---|
1424 | * ---------------------------------------------------------------------- |
---|
1425 | */ |
---|
1426 | static void |
---|
1427 | DiffviewWorldChanged(cdata) |
---|
1428 | ClientData cdata; /* widget data */ |
---|
1429 | { |
---|
1430 | Diffview *dvPtr = (Diffview*)cdata; |
---|
1431 | GC gc; XGCValues gcValues; |
---|
1432 | unsigned long mask; |
---|
1433 | |
---|
1434 | /* GC for normal widget text */ |
---|
1435 | gcValues.foreground = dvPtr->fgColorPtr->pixel; |
---|
1436 | gcValues.graphics_exposures = False; |
---|
1437 | gcValues.font = Tk_FontId(dvPtr->tkfont); |
---|
1438 | mask = GCForeground | GCFont | GCGraphicsExposures; |
---|
1439 | |
---|
1440 | gc = Tk_GetGC(dvPtr->tkwin, mask, &gcValues); |
---|
1441 | if (dvPtr->normGC != None) { |
---|
1442 | Tk_FreeGC(dvPtr->display, dvPtr->normGC); |
---|
1443 | } |
---|
1444 | dvPtr->normGC = gc; |
---|
1445 | |
---|
1446 | /* GC for added diff text */ |
---|
1447 | gcValues.foreground = dvPtr->addFgColorPtr->pixel; |
---|
1448 | gcValues.graphics_exposures = False; |
---|
1449 | gcValues.font = Tk_FontId(dvPtr->tkfont); |
---|
1450 | mask = GCForeground | GCFont | GCGraphicsExposures; |
---|
1451 | |
---|
1452 | gc = Tk_GetGC(dvPtr->tkwin, mask, &gcValues); |
---|
1453 | if (dvPtr->addFgGC != None) { |
---|
1454 | Tk_FreeGC(dvPtr->display, dvPtr->addFgGC); |
---|
1455 | } |
---|
1456 | dvPtr->addFgGC = gc; |
---|
1457 | |
---|
1458 | /* GC for deleted diff text */ |
---|
1459 | gcValues.foreground = dvPtr->delFgColorPtr->pixel; |
---|
1460 | gcValues.graphics_exposures = False; |
---|
1461 | gcValues.font = Tk_FontId(dvPtr->tkfont); |
---|
1462 | mask = GCForeground | GCFont | GCGraphicsExposures; |
---|
1463 | |
---|
1464 | gc = Tk_GetGC(dvPtr->tkwin, mask, &gcValues); |
---|
1465 | if (dvPtr->delFgGC != None) { |
---|
1466 | Tk_FreeGC(dvPtr->display, dvPtr->delFgGC); |
---|
1467 | } |
---|
1468 | dvPtr->delFgGC = gc; |
---|
1469 | |
---|
1470 | /* GC for changed diff text */ |
---|
1471 | gcValues.foreground = dvPtr->chgFgColorPtr->pixel; |
---|
1472 | gcValues.graphics_exposures = False; |
---|
1473 | gcValues.font = Tk_FontId(dvPtr->tkfont); |
---|
1474 | mask = GCForeground | GCFont | GCGraphicsExposures; |
---|
1475 | |
---|
1476 | gc = Tk_GetGC(dvPtr->tkwin, mask, &gcValues); |
---|
1477 | if (dvPtr->chgFgGC != None) { |
---|
1478 | Tk_FreeGC(dvPtr->display, dvPtr->chgFgGC); |
---|
1479 | } |
---|
1480 | dvPtr->chgFgGC = gc; |
---|
1481 | |
---|
1482 | /* this call comes when the font changes -- fix the layout */ |
---|
1483 | dvPtr->flags |= FONT_CHANGED; |
---|
1484 | |
---|
1485 | /* get ready to redraw */ |
---|
1486 | DiffviewComputeGeometry(dvPtr); |
---|
1487 | dvPtr->flags |= UPDATE_V_SCROLLBAR|UPDATE_H_SCROLLBAR; |
---|
1488 | EventuallyRedraw(dvPtr); |
---|
1489 | } |
---|
1490 | |
---|
1491 | /* |
---|
1492 | * ---------------------------------------------------------------------- |
---|
1493 | * EventuallyRedraw() |
---|
1494 | * |
---|
1495 | * Arranges for the widget to redraw itself at the next idle point. |
---|
1496 | * ---------------------------------------------------------------------- |
---|
1497 | */ |
---|
1498 | static void |
---|
1499 | EventuallyRedraw(dvPtr) |
---|
1500 | Diffview *dvPtr; /* widget data */ |
---|
1501 | { |
---|
1502 | if ((dvPtr->flags & REDRAW_PENDING) || (dvPtr->flags & WIDGET_DELETED) |
---|
1503 | || !Tk_IsMapped(dvPtr->tkwin)) { |
---|
1504 | return; /* no need to redraw */ |
---|
1505 | } |
---|
1506 | |
---|
1507 | dvPtr->flags |= REDRAW_PENDING; |
---|
1508 | Tcl_DoWhenIdle(DisplayDiffview, (ClientData)dvPtr); |
---|
1509 | } |
---|
1510 | |
---|
1511 | /* |
---|
1512 | * ---------------------------------------------------------------------- |
---|
1513 | * DisplayDiffview() |
---|
1514 | * |
---|
1515 | * Redraws the widget based on the current view and all data. |
---|
1516 | * ---------------------------------------------------------------------- |
---|
1517 | */ |
---|
1518 | static void |
---|
1519 | DisplayDiffview(cdata) |
---|
1520 | ClientData cdata; /* widget data */ |
---|
1521 | { |
---|
1522 | Diffview *dvPtr = (Diffview*)cdata; |
---|
1523 | Tk_Window tkwin = dvPtr->tkwin; |
---|
1524 | |
---|
1525 | int i, bnum, bline, x, xw, y, ymid, width; |
---|
1526 | char *textPtr; int textLen; |
---|
1527 | Pixmap pixmap; |
---|
1528 | GC bg, fg; |
---|
1529 | |
---|
1530 | /* handling redraw now -- no longer pending */ |
---|
1531 | dvPtr->flags &= ~REDRAW_PENDING; |
---|
1532 | |
---|
1533 | if (dvPtr->flags & WIDGET_DELETED) { |
---|
1534 | /* widget is being torn down -- bail out! */ |
---|
1535 | return; |
---|
1536 | } |
---|
1537 | |
---|
1538 | /* handle any pending layout changes */ |
---|
1539 | DiffviewUpdateLayout(dvPtr); |
---|
1540 | |
---|
1541 | /* |
---|
1542 | * Hang onto the widget data until we're done updating scrollbars. |
---|
1543 | * The -xscrollcommand and -yscrollcommand options may take us into |
---|
1544 | * code that deletes the widget. |
---|
1545 | */ |
---|
1546 | Tcl_Preserve((ClientData)dvPtr); |
---|
1547 | |
---|
1548 | if (dvPtr->flags & UPDATE_V_SCROLLBAR) { |
---|
1549 | DiffviewUpdateVScrollbar(dvPtr); |
---|
1550 | if ((dvPtr->flags & WIDGET_DELETED) || !Tk_IsMapped(tkwin)) { |
---|
1551 | Tcl_Release((ClientData)dvPtr); |
---|
1552 | return; |
---|
1553 | } |
---|
1554 | } |
---|
1555 | if (dvPtr->flags & UPDATE_H_SCROLLBAR) { |
---|
1556 | DiffviewUpdateHScrollbar(dvPtr); |
---|
1557 | if ((dvPtr->flags & WIDGET_DELETED) || !Tk_IsMapped(tkwin)) { |
---|
1558 | Tcl_Release((ClientData)dvPtr); |
---|
1559 | return; |
---|
1560 | } |
---|
1561 | } |
---|
1562 | dvPtr->flags &= ~(REDRAW_PENDING|UPDATE_V_SCROLLBAR|UPDATE_H_SCROLLBAR); |
---|
1563 | Tcl_Release((ClientData)dvPtr); |
---|
1564 | |
---|
1565 | #ifndef TK_NO_DOUBLE_BUFFERING |
---|
1566 | /* |
---|
1567 | * Best solution is to draw everything into a temporary pixmap |
---|
1568 | * and copy that to the screen in one shot. That avoids flashing. |
---|
1569 | */ |
---|
1570 | pixmap = Tk_GetPixmap(dvPtr->display, Tk_WindowId(tkwin), |
---|
1571 | Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin)); |
---|
1572 | #else |
---|
1573 | pixmap = Tk_WindowId(tkwin); |
---|
1574 | #endif |
---|
1575 | |
---|
1576 | Tk_Fill3DRectangle(tkwin, pixmap, dvPtr->normalBorder, 0, 0, |
---|
1577 | Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT); |
---|
1578 | |
---|
1579 | /* |
---|
1580 | * Find the top line in the view in each buffer |
---|
1581 | */ |
---|
1582 | y = dvPtr->inset + dvPtr->topLine*dvPtr->lineHeight + dvPtr->lineAscent |
---|
1583 | - dvPtr->yOffset; |
---|
1584 | x = dvPtr->inset - dvPtr->xOffset; |
---|
1585 | |
---|
1586 | if (Tk_Width(tkwin) > dvPtr->maxWidth) { |
---|
1587 | width = Tk_Width(tkwin)+10; |
---|
1588 | } else { |
---|
1589 | width = dvPtr->maxWidth+10; |
---|
1590 | } |
---|
1591 | |
---|
1592 | for (i=dvPtr->topLine; |
---|
1593 | i <= dvPtr->btmLine && i < dvPtr->worldview.numLines; |
---|
1594 | i++) { |
---|
1595 | |
---|
1596 | /* draw any diff rectangle for this line */ |
---|
1597 | fg = dvPtr->normGC; |
---|
1598 | bg = None; |
---|
1599 | |
---|
1600 | switch (dvPtr->worldview.lines[i].style) { |
---|
1601 | case 'a': { |
---|
1602 | fg = dvPtr->addFgGC; |
---|
1603 | bg = Tk_GCForColor(dvPtr->addBgColorPtr, pixmap); |
---|
1604 | break; |
---|
1605 | } |
---|
1606 | case 'd': { |
---|
1607 | fg = dvPtr->delFgGC; |
---|
1608 | bg = Tk_GCForColor(dvPtr->delBgColorPtr, pixmap); |
---|
1609 | break; |
---|
1610 | } |
---|
1611 | case 'c': { |
---|
1612 | fg = dvPtr->chgFgGC; |
---|
1613 | bg = Tk_GCForColor(dvPtr->chgBgColorPtr, pixmap); |
---|
1614 | break; |
---|
1615 | } |
---|
1616 | } |
---|
1617 | |
---|
1618 | if (bg != None) { |
---|
1619 | XFillRectangle(Tk_Display(tkwin), pixmap, bg, |
---|
1620 | x, y - dvPtr->lineAscent, |
---|
1621 | (unsigned int)width, (unsigned int)dvPtr->lineHeight); |
---|
1622 | } |
---|
1623 | |
---|
1624 | bnum = dvPtr->worldview.lines[i].bnum; |
---|
1625 | bline = dvPtr->worldview.lines[i].bline; |
---|
1626 | |
---|
1627 | /* a negative number means "leave the line blank" */ |
---|
1628 | if (bline >= 0) { |
---|
1629 | textPtr = dvPtr->buffer[bnum].lineLimits->startPtr[bline]; |
---|
1630 | textLen = dvPtr->buffer[bnum].lineLimits->lenPtr[bline]; |
---|
1631 | |
---|
1632 | /* Draw the actual text of this item */ |
---|
1633 | Tk_DrawChars(dvPtr->display, pixmap, fg, dvPtr->tkfont, |
---|
1634 | textPtr, textLen, x, y); |
---|
1635 | |
---|
1636 | /* Draw an overstrike on deleted text */ |
---|
1637 | if (dvPtr->worldview.lines[i].style == 'd' && dvPtr->overStrDel) { |
---|
1638 | xw = Tk_TextWidth(dvPtr->tkfont, textPtr, textLen) + 5; |
---|
1639 | ymid = y - dvPtr->lineAscent/2; |
---|
1640 | XDrawLine(Tk_Display(tkwin), pixmap, fg, 0, ymid, xw, ymid); |
---|
1641 | } |
---|
1642 | } |
---|
1643 | |
---|
1644 | y += dvPtr->lineHeight; |
---|
1645 | } |
---|
1646 | |
---|
1647 | /* |
---|
1648 | * Draw the border on top so that it covers any characters that |
---|
1649 | * have scrolled off screen. |
---|
1650 | */ |
---|
1651 | Tk_Draw3DRectangle(tkwin, pixmap, dvPtr->normalBorder, |
---|
1652 | dvPtr->highlightWidth, dvPtr->highlightWidth, |
---|
1653 | Tk_Width(tkwin) - 2*dvPtr->highlightWidth, |
---|
1654 | Tk_Height(tkwin) - 2*dvPtr->highlightWidth, |
---|
1655 | dvPtr->borderWidth, dvPtr->relief); |
---|
1656 | |
---|
1657 | if (dvPtr->highlightWidth > 0) { |
---|
1658 | XColor *color; GC gc; |
---|
1659 | |
---|
1660 | color = (dvPtr->flags & GOT_FOCUS) |
---|
1661 | ? dvPtr->highlightColor : dvPtr->highlightBgColor; |
---|
1662 | gc = Tk_GCForColor(color, pixmap); |
---|
1663 | Tk_DrawFocusHighlight(dvPtr->tkwin, gc, dvPtr->highlightWidth, pixmap); |
---|
1664 | } |
---|
1665 | |
---|
1666 | #ifndef TK_NO_DOUBLE_BUFFERING |
---|
1667 | XCopyArea(dvPtr->display, pixmap, Tk_WindowId(tkwin), |
---|
1668 | dvPtr->normGC, 0, 0, (unsigned) Tk_Width(tkwin), |
---|
1669 | (unsigned) Tk_Height(tkwin), 0, 0); |
---|
1670 | Tk_FreePixmap(dvPtr->display, pixmap); |
---|
1671 | #endif |
---|
1672 | } |
---|
1673 | |
---|
1674 | /* |
---|
1675 | * ---------------------------------------------------------------------- |
---|
1676 | * DiffviewComputeGeometry() |
---|
1677 | * |
---|
1678 | * Recomputes the overall dimensions of the widget when the overall |
---|
1679 | * size or the borderwidth is changed. Registers a new size for the |
---|
1680 | * widget. |
---|
1681 | * ---------------------------------------------------------------------- |
---|
1682 | */ |
---|
1683 | static void |
---|
1684 | DiffviewComputeGeometry(dvPtr) |
---|
1685 | Diffview *dvPtr; /* widget data */ |
---|
1686 | { |
---|
1687 | int pixelWidth, pixelHeight; |
---|
1688 | |
---|
1689 | dvPtr->xScrollUnit = Tk_TextWidth(dvPtr->tkfont, "0", 1); |
---|
1690 | if (dvPtr->xScrollUnit == 0) { |
---|
1691 | dvPtr->xScrollUnit = 1; |
---|
1692 | } |
---|
1693 | |
---|
1694 | pixelWidth = dvPtr->width + 2*dvPtr->inset; |
---|
1695 | pixelHeight = dvPtr->height + 2*dvPtr->inset; |
---|
1696 | Tk_GeometryRequest(dvPtr->tkwin, pixelWidth, pixelHeight); |
---|
1697 | Tk_SetInternalBorder(dvPtr->tkwin, dvPtr->inset); |
---|
1698 | } |
---|
1699 | |
---|
1700 | /* |
---|
1701 | * ---------------------------------------------------------------------- |
---|
1702 | * DiffviewEventProc() |
---|
1703 | * |
---|
1704 | * Catches important events on the widget and causes it to redraw |
---|
1705 | * itself and react to focus changes. |
---|
1706 | * ---------------------------------------------------------------------- |
---|
1707 | */ |
---|
1708 | static void |
---|
1709 | DiffviewEventProc(cdata, eventPtr) |
---|
1710 | ClientData cdata; /* widget data */ |
---|
1711 | XEvent *eventPtr; /* event information coming from X11 */ |
---|
1712 | { |
---|
1713 | Diffview *dvPtr = (Diffview*)cdata; |
---|
1714 | |
---|
1715 | if (eventPtr->type == Expose) { |
---|
1716 | EventuallyRedraw(dvPtr); |
---|
1717 | } |
---|
1718 | else if (eventPtr->type == DestroyNotify) { |
---|
1719 | if (!(dvPtr->flags & WIDGET_DELETED)) { |
---|
1720 | dvPtr->flags |= WIDGET_DELETED; |
---|
1721 | Tcl_DeleteCommandFromToken(dvPtr->interp, dvPtr->widgetCmd); |
---|
1722 | if (dvPtr->flags & REDRAW_PENDING) { |
---|
1723 | Tcl_CancelIdleCall(DisplayDiffview, cdata); |
---|
1724 | } |
---|
1725 | Tcl_EventuallyFree(cdata, DestroyDiffview); |
---|
1726 | } |
---|
1727 | } |
---|
1728 | else if (eventPtr->type == ConfigureNotify) { |
---|
1729 | dvPtr->flags |= UPDATE_V_SCROLLBAR|UPDATE_H_SCROLLBAR; |
---|
1730 | ChangeDiffviewView(dvPtr, dvPtr->topLine); |
---|
1731 | EventuallyRedraw(dvPtr); |
---|
1732 | } |
---|
1733 | else if (eventPtr->type == FocusIn) { |
---|
1734 | if (eventPtr->xfocus.detail != NotifyInferior) { |
---|
1735 | dvPtr->flags |= GOT_FOCUS; |
---|
1736 | EventuallyRedraw(dvPtr); |
---|
1737 | } |
---|
1738 | } |
---|
1739 | else if (eventPtr->type == FocusOut) { |
---|
1740 | if (eventPtr->xfocus.detail != NotifyInferior) { |
---|
1741 | dvPtr->flags &= ~GOT_FOCUS; |
---|
1742 | EventuallyRedraw(dvPtr); |
---|
1743 | } |
---|
1744 | } |
---|
1745 | } |
---|
1746 | |
---|
1747 | /* |
---|
1748 | * ---------------------------------------------------------------------- |
---|
1749 | * DiffviewCmdDeletedProc -- |
---|
1750 | * |
---|
1751 | * Invoked whenever the command associated with the widget is deleted. |
---|
1752 | * If the widget is not already being destroyed, this starts the process. |
---|
1753 | * ---------------------------------------------------------------------- |
---|
1754 | */ |
---|
1755 | static void |
---|
1756 | DiffviewCmdDeletedProc(cdata) |
---|
1757 | ClientData cdata; /* widget data */ |
---|
1758 | { |
---|
1759 | Diffview *dvPtr = (Diffview*)cdata; |
---|
1760 | |
---|
1761 | /* |
---|
1762 | * This gets invoked whenever the command is deleted. If we haven't |
---|
1763 | * started destroying the widget yet, then do it now to clean up. |
---|
1764 | */ |
---|
1765 | if (!(dvPtr->flags & WIDGET_DELETED)) { |
---|
1766 | Tk_DestroyWindow(dvPtr->tkwin); |
---|
1767 | } |
---|
1768 | } |
---|
1769 | |
---|
1770 | /* |
---|
1771 | * ---------------------------------------------------------------------- |
---|
1772 | * ChangeDiffviewView() |
---|
1773 | * |
---|
1774 | * Changes the y-view of the widget for scrolling operations. Sets the |
---|
1775 | * given line to the top of the view. |
---|
1776 | * ---------------------------------------------------------------------- |
---|
1777 | */ |
---|
1778 | static void |
---|
1779 | ChangeDiffviewView(dvPtr, lnum) |
---|
1780 | Diffview *dvPtr; /* widget data */ |
---|
1781 | int lnum; /* this line should appear at the top */ |
---|
1782 | { |
---|
1783 | int maxLines, ySize, yLines; |
---|
1784 | |
---|
1785 | DiffviewUpdateLayout(dvPtr); |
---|
1786 | ySize = Tk_Height(dvPtr->tkwin) - 2*dvPtr->inset; |
---|
1787 | yLines = ySize/dvPtr->lineHeight; |
---|
1788 | maxLines = dvPtr->maxHeight/dvPtr->lineHeight; |
---|
1789 | |
---|
1790 | if (lnum >= (maxLines - yLines)) { |
---|
1791 | lnum = maxLines - yLines; |
---|
1792 | } |
---|
1793 | if (lnum < 0) { |
---|
1794 | lnum = 0; |
---|
1795 | } |
---|
1796 | if (dvPtr->topLine != lnum) { |
---|
1797 | dvPtr->topLine = lnum; |
---|
1798 | dvPtr->yOffset = lnum * dvPtr->lineHeight; |
---|
1799 | EventuallyRedraw(dvPtr); |
---|
1800 | dvPtr->flags |= UPDATE_V_SCROLLBAR; |
---|
1801 | } |
---|
1802 | } |
---|
1803 | |
---|
1804 | /* |
---|
1805 | * ---------------------------------------------------------------------- |
---|
1806 | * DiffviewScanTo() |
---|
1807 | * |
---|
1808 | * Implements the "scan dragto" operation on the widget. Given a |
---|
1809 | * starting point from the "scan mark" operation, this adjusts the |
---|
1810 | * view to the given location. |
---|
1811 | * ---------------------------------------------------------------------- |
---|
1812 | */ |
---|
1813 | static void |
---|
1814 | DiffviewScanTo(dvPtr, x, y) |
---|
1815 | Diffview *dvPtr; /* widget data */ |
---|
1816 | int x; /* x-coord for drag-to location */ |
---|
1817 | int y; /* y-coord for drag-to location */ |
---|
1818 | { |
---|
1819 | int newTopLine, newOffset, maxLine, maxOffset; |
---|
1820 | |
---|
1821 | /* |
---|
1822 | * Compute the top line for the display by amplifying the difference |
---|
1823 | * between the current "drag" point and the original "start" point. |
---|
1824 | */ |
---|
1825 | maxLine = dvPtr->maxHeight/dvPtr->lineHeight - dvPtr->fullLines; |
---|
1826 | |
---|
1827 | newTopLine = dvPtr->scanMarkYStart |
---|
1828 | - (10*(y - dvPtr->scanMarkY))/dvPtr->lineHeight; |
---|
1829 | |
---|
1830 | if (newTopLine > maxLine) { |
---|
1831 | newTopLine = dvPtr->scanMarkYStart = maxLine; |
---|
1832 | dvPtr->scanMarkY = y; |
---|
1833 | } |
---|
1834 | else if (newTopLine < 0) { |
---|
1835 | newTopLine = dvPtr->scanMarkYStart = 0; |
---|
1836 | dvPtr->scanMarkY = y; |
---|
1837 | } |
---|
1838 | ChangeDiffviewView(dvPtr, newTopLine); |
---|
1839 | |
---|
1840 | /* |
---|
1841 | * Compute the left edge for the display by amplifying the difference |
---|
1842 | * between the current "drag" point and the original "start" point. |
---|
1843 | */ |
---|
1844 | maxOffset = dvPtr->maxWidth - (Tk_Width(dvPtr->tkwin) - 2*dvPtr->inset); |
---|
1845 | newOffset = dvPtr->scanMarkXStart - (10*(x - dvPtr->scanMarkX)); |
---|
1846 | if (newOffset > maxOffset) { |
---|
1847 | newOffset = dvPtr->scanMarkXStart = maxOffset; |
---|
1848 | dvPtr->scanMarkX = x; |
---|
1849 | } else if (newOffset < 0) { |
---|
1850 | newOffset = dvPtr->scanMarkXStart = 0; |
---|
1851 | dvPtr->scanMarkX = x; |
---|
1852 | } |
---|
1853 | newOffset -= newOffset % dvPtr->xScrollUnit; |
---|
1854 | |
---|
1855 | if (newOffset != dvPtr->xOffset) { |
---|
1856 | dvPtr->xOffset = newOffset; |
---|
1857 | dvPtr->flags |= UPDATE_H_SCROLLBAR; |
---|
1858 | EventuallyRedraw(dvPtr); |
---|
1859 | } |
---|
1860 | } |
---|
1861 | |
---|
1862 | /* |
---|
1863 | * ---------------------------------------------------------------------- |
---|
1864 | * DiffviewUpdateLayout() |
---|
1865 | * |
---|
1866 | * Called whenever the widget is about to access layout information |
---|
1867 | * to make sure that the latest info is in place and up-to-date. |
---|
1868 | * Computes the line start/end for each line in each buffer, then |
---|
1869 | * computes the diffs and figures out how many lines to show. |
---|
1870 | * ---------------------------------------------------------------------- |
---|
1871 | */ |
---|
1872 | static void |
---|
1873 | DiffviewUpdateLayout(dvPtr) |
---|
1874 | Diffview *dvPtr; /* widget data */ |
---|
1875 | { |
---|
1876 | int changes = 0; /* no layout changes yet */ |
---|
1877 | DiffviewBuffer* bufferPtr; |
---|
1878 | DiffviewDiffOp *currOp; |
---|
1879 | DiffviewLayoutLine line; |
---|
1880 | int i, bnum, bline, pixelWidth, maxWidth, ySize; |
---|
1881 | int numLines1, numLines2, lnum1, lnum2, dnum, lastdnum, pastDiff; |
---|
1882 | char *textPtr, *textPtr2; int textLen; |
---|
1883 | Tk_FontMetrics fm; |
---|
1884 | |
---|
1885 | /* if the font changed, then re-measure everything */ |
---|
1886 | changes = ((dvPtr->flags & FONT_CHANGED) != 0); |
---|
1887 | |
---|
1888 | /* fill in line limits for any new data */ |
---|
1889 | for (bnum=0; bnum < 2; bnum++) { |
---|
1890 | bufferPtr = &dvPtr->buffer[bnum]; |
---|
1891 | |
---|
1892 | if (bufferPtr->textObj != NULL && bufferPtr->lineLimits == NULL) { |
---|
1893 | textPtr = Tcl_GetStringFromObj(bufferPtr->textObj, &textLen); |
---|
1894 | bufferPtr->lineLimits = DiffviewLinesCreate(textPtr, textLen); |
---|
1895 | changes = 1; |
---|
1896 | } |
---|
1897 | } |
---|
1898 | |
---|
1899 | if (changes) { |
---|
1900 | /* recompute the diffs between the buffers */ |
---|
1901 | if (dvPtr->diffsPtr) { |
---|
1902 | DiffviewDiffsFree(dvPtr->diffsPtr); |
---|
1903 | dvPtr->diffsPtr = NULL; |
---|
1904 | } |
---|
1905 | |
---|
1906 | if (dvPtr->buffer[0].textObj && dvPtr->buffer[1].textObj) { |
---|
1907 | textPtr = Tcl_GetStringFromObj(dvPtr->buffer[0].textObj, &textLen); |
---|
1908 | textPtr2 = Tcl_GetStringFromObj(dvPtr->buffer[1].textObj, &textLen); |
---|
1909 | |
---|
1910 | dvPtr->diffsPtr = DiffviewDiffsCreate( |
---|
1911 | textPtr, dvPtr->buffer[0].lineLimits, |
---|
1912 | textPtr2, dvPtr->buffer[1].lineLimits); |
---|
1913 | } |
---|
1914 | |
---|
1915 | /* |
---|
1916 | * Compute the layout of all lines according to the current |
---|
1917 | * view mode. Each line in the world view is stored in the |
---|
1918 | * array dvPtr->worldview.lines. Each line has a style (color |
---|
1919 | * for normal, add, delete, etc.) and an indication of which |
---|
1920 | * buffer it comes from. |
---|
1921 | */ |
---|
1922 | DiffviewLayoutClear(&dvPtr->worldview); |
---|
1923 | |
---|
1924 | /* |
---|
1925 | * March through the lines and figure out the source and style |
---|
1926 | * of each line based on the diffs: |
---|
1927 | * 'n' = normal (common) line |
---|
1928 | * 'a' = draw with the "added" style |
---|
1929 | * 'd' = draw with the "deleted" style |
---|
1930 | * 'c' = draw with the "changed" style |
---|
1931 | */ |
---|
1932 | numLines1 = (dvPtr->buffer[0].lineLimits) |
---|
1933 | ? dvPtr->buffer[0].lineLimits->numLines : 0; |
---|
1934 | numLines2 = (dvPtr->buffer[1].lineLimits) |
---|
1935 | ? dvPtr->buffer[1].lineLimits->numLines : 0; |
---|
1936 | |
---|
1937 | dnum = 0; /* current difference in diffsPtr */ |
---|
1938 | lnum1 = lnum2 = 0; |
---|
1939 | |
---|
1940 | while (lnum1 < numLines1 || lnum2 < numLines2) { |
---|
1941 | /* assume it's a normal-looking line (buffers are the same) */ |
---|
1942 | line.style = 'n'; |
---|
1943 | line.bnum = 0; |
---|
1944 | line.bline = lnum1; |
---|
1945 | line.diffNum = -1; |
---|
1946 | |
---|
1947 | /* is there a diff that contains this line? */ |
---|
1948 | if (dvPtr->diffsPtr && dnum < dvPtr->diffsPtr->numDiffs) { |
---|
1949 | currOp = &dvPtr->diffsPtr->ops[dnum]; |
---|
1950 | |
---|
1951 | if ( (lnum1 >= currOp->fromIndex1 |
---|
1952 | && lnum1 <= currOp->toIndex1) |
---|
1953 | || (lnum2 >= currOp->fromIndex2 |
---|
1954 | && lnum2 <= currOp->toIndex2) ) { |
---|
1955 | |
---|
1956 | line.diffNum = dnum; /* line is part of this diff */ |
---|
1957 | |
---|
1958 | switch (currOp->op) { |
---|
1959 | case 'c': { |
---|
1960 | if (dvPtr->layout == LAYOUT_INLINE) { |
---|
1961 | if (dvPtr->diffdir == DIFF_1TO2) { |
---|
1962 | /* show the buffer #1 lines first, then #2 */ |
---|
1963 | if (lnum1 <= currOp->toIndex1) { |
---|
1964 | line.style = 'd'; |
---|
1965 | line.bnum = 0; |
---|
1966 | line.bline = lnum1++; |
---|
1967 | } else { |
---|
1968 | line.style = 'a'; |
---|
1969 | line.bnum = 1; |
---|
1970 | line.bline = lnum2++; |
---|
1971 | } |
---|
1972 | } else { |
---|
1973 | /* reverse -- show #2 lines first, then #1 */ |
---|
1974 | if (lnum2 <= currOp->toIndex2) { |
---|
1975 | line.style = 'd'; |
---|
1976 | line.bnum = 1; |
---|
1977 | line.bline = lnum2++; |
---|
1978 | } else { |
---|
1979 | line.style = 'a'; |
---|
1980 | line.bnum = 0; |
---|
1981 | line.bline = lnum1++; |
---|
1982 | } |
---|
1983 | } |
---|
1984 | } else { |
---|
1985 | if (dvPtr->diffdir == DIFF_1TO2) { |
---|
1986 | /* show final lines in buf #2 as "changed" */ |
---|
1987 | line.style = 'c'; |
---|
1988 | line.bnum = 1; |
---|
1989 | line.bline = lnum2++; |
---|
1990 | lnum1 = currOp->toIndex1+1; |
---|
1991 | } else { |
---|
1992 | /* show final lines in buf #1 as "changed" */ |
---|
1993 | line.style = 'c'; |
---|
1994 | line.bnum = 0; |
---|
1995 | line.bline = lnum1++; |
---|
1996 | lnum2 = currOp->toIndex2+1; |
---|
1997 | } |
---|
1998 | } |
---|
1999 | break; |
---|
2000 | } |
---|
2001 | case 'a': { |
---|
2002 | if (dvPtr->diffdir == DIFF_1TO2) { |
---|
2003 | /* show lines in buffer #2 as 'added' */ |
---|
2004 | line.style = 'a'; |
---|
2005 | line.bnum = 1; |
---|
2006 | line.bline = lnum2++; |
---|
2007 | lnum1 = currOp->toIndex1; |
---|
2008 | } else { |
---|
2009 | /* reverse diff -- like we're deleting lines */ |
---|
2010 | if (dvPtr->layout == LAYOUT_INLINE) { |
---|
2011 | line.style = 'd'; |
---|
2012 | line.bnum = 1; |
---|
2013 | line.bline = lnum2++; |
---|
2014 | lnum1 = currOp->toIndex1; |
---|
2015 | } else { |
---|
2016 | /* show lines from buffer #2 as empty */ |
---|
2017 | line.style = 'd'; |
---|
2018 | line.bnum = 0; |
---|
2019 | line.bline = -1; |
---|
2020 | lnum2++; |
---|
2021 | lnum1 = currOp->toIndex1; |
---|
2022 | } |
---|
2023 | } |
---|
2024 | break; |
---|
2025 | } |
---|
2026 | case 'd': { |
---|
2027 | if (dvPtr->diffdir == DIFF_1TO2) { |
---|
2028 | if (dvPtr->layout == LAYOUT_INLINE) { |
---|
2029 | line.style = 'd'; |
---|
2030 | line.bnum = 0; |
---|
2031 | line.bline = lnum1++; |
---|
2032 | lnum2 = currOp->toIndex2; |
---|
2033 | } else { |
---|
2034 | /* show lines from buffer #2 as empty */ |
---|
2035 | line.style = 'd'; |
---|
2036 | line.bnum = 0; |
---|
2037 | line.bline = -1; |
---|
2038 | lnum1++; |
---|
2039 | lnum2 = currOp->toIndex2; |
---|
2040 | } |
---|
2041 | } else { |
---|
2042 | /* reverse diff -- like we're adding lines */ |
---|
2043 | line.style = 'a'; |
---|
2044 | line.bnum = 0; |
---|
2045 | line.bline = lnum1++; |
---|
2046 | lnum2 = currOp->toIndex2; |
---|
2047 | } |
---|
2048 | break; |
---|
2049 | } |
---|
2050 | default: { |
---|
2051 | Tcl_Panic("bad diff type '%c' found in layout", |
---|
2052 | currOp->op); |
---|
2053 | break; |
---|
2054 | } |
---|
2055 | } |
---|
2056 | } else { |
---|
2057 | /* normal line -- keep moving forward */ |
---|
2058 | lnum1++; lnum2++; |
---|
2059 | } |
---|
2060 | |
---|
2061 | /* have we reached the end of the diff? then move on */ |
---|
2062 | pastDiff = 0; |
---|
2063 | switch (currOp->op) { |
---|
2064 | case 'c': |
---|
2065 | pastDiff = (lnum1 > currOp->toIndex1 |
---|
2066 | && lnum2 > currOp->toIndex2); |
---|
2067 | break; |
---|
2068 | case 'a': |
---|
2069 | pastDiff = (lnum2 > currOp->toIndex2); |
---|
2070 | break; |
---|
2071 | case 'd': |
---|
2072 | pastDiff = (lnum1 > currOp->toIndex1); |
---|
2073 | break; |
---|
2074 | } |
---|
2075 | if (pastDiff) { |
---|
2076 | dnum++; |
---|
2077 | } |
---|
2078 | } else { |
---|
2079 | /* no more diffs -- keep moving forward */ |
---|
2080 | lnum1++; lnum2++; |
---|
2081 | } |
---|
2082 | |
---|
2083 | /* add this new line to the layout */ |
---|
2084 | DiffviewLayoutAdd(&dvPtr->worldview, &line); |
---|
2085 | } |
---|
2086 | |
---|
2087 | /* |
---|
2088 | * Figure out where the diffs are located, and put that info |
---|
2089 | * back into the diffs. This makes it easy later to refer to |
---|
2090 | * diff "#3" and understand what lines we're talking about. |
---|
2091 | */ |
---|
2092 | lastdnum = -1; |
---|
2093 | for (i=0; i < dvPtr->worldview.numLines; i++) { |
---|
2094 | dnum = dvPtr->worldview.lines[i].diffNum; |
---|
2095 | if (dnum != lastdnum) { |
---|
2096 | if (lastdnum < 0) { |
---|
2097 | /* leading edge -- catch the "from" line */ |
---|
2098 | lnum1 = i; |
---|
2099 | } else { |
---|
2100 | /* trailing edge -- save diff info */ |
---|
2101 | dvPtr->diffsPtr->ops[lastdnum].fromWorld = lnum1; |
---|
2102 | dvPtr->diffsPtr->ops[lastdnum].toWorld = i-1; |
---|
2103 | } |
---|
2104 | } |
---|
2105 | lastdnum = dnum; |
---|
2106 | } |
---|
2107 | if (lastdnum >= 0) { |
---|
2108 | dvPtr->diffsPtr->ops[lastdnum].fromWorld = lnum1; |
---|
2109 | dvPtr->diffsPtr->ops[lastdnum].toWorld = i-1; |
---|
2110 | } |
---|
2111 | |
---|
2112 | /* compute overall text width for all lines */ |
---|
2113 | maxWidth = 0; |
---|
2114 | for (i=0; i < dvPtr->worldview.numLines; i++) { |
---|
2115 | bline = dvPtr->worldview.lines[i].bline; |
---|
2116 | if (bline >= 0) { |
---|
2117 | bnum = dvPtr->worldview.lines[i].bnum; |
---|
2118 | bufferPtr = &dvPtr->buffer[bnum]; |
---|
2119 | |
---|
2120 | if (bufferPtr->lineLimits) { |
---|
2121 | textPtr = bufferPtr->lineLimits->startPtr[bline]; |
---|
2122 | textLen = bufferPtr->lineLimits->lenPtr[bline]; |
---|
2123 | pixelWidth = Tk_TextWidth(dvPtr->tkfont, textPtr, textLen); |
---|
2124 | |
---|
2125 | if (pixelWidth > maxWidth) { |
---|
2126 | maxWidth = pixelWidth; |
---|
2127 | } |
---|
2128 | } |
---|
2129 | } |
---|
2130 | } |
---|
2131 | dvPtr->maxWidth = maxWidth; |
---|
2132 | |
---|
2133 | /* compute overall height of the widget */ |
---|
2134 | Tk_GetFontMetrics(dvPtr->tkfont, &fm); |
---|
2135 | dvPtr->lineHeight = fm.linespace; |
---|
2136 | dvPtr->lineAscent = fm.ascent; |
---|
2137 | dvPtr->maxHeight = dvPtr->worldview.numLines * fm.linespace; |
---|
2138 | |
---|
2139 | /* figure out the limits of the current view */ |
---|
2140 | ySize = Tk_Height(dvPtr->tkwin) - 2*dvPtr->inset; |
---|
2141 | dvPtr->topLine = dvPtr->yOffset/fm.linespace; |
---|
2142 | dvPtr->btmLine = (dvPtr->yOffset + ySize)/fm.linespace + 1; |
---|
2143 | dvPtr->fullLines = ySize/fm.linespace; |
---|
2144 | |
---|
2145 | dvPtr->flags &= ~FONT_CHANGED; |
---|
2146 | } |
---|
2147 | } |
---|
2148 | |
---|
2149 | /* |
---|
2150 | * ---------------------------------------------------------------------- |
---|
2151 | * DiffviewUpdateVScrollbar() |
---|
2152 | * |
---|
2153 | * Used to invoke the -yscrollcommand whenever the y-view has changed. |
---|
2154 | * This updates the scrollbar so that it shows the proper bubble. |
---|
2155 | * If there is no -yscrollcommand option, this does nothing. |
---|
2156 | * ---------------------------------------------------------------------- |
---|
2157 | */ |
---|
2158 | static void |
---|
2159 | DiffviewUpdateVScrollbar(dvPtr) |
---|
2160 | Diffview *dvPtr; /* widget data */ |
---|
2161 | { |
---|
2162 | char string[TCL_DOUBLE_SPACE*2 + 2]; |
---|
2163 | double first, last; |
---|
2164 | int result, ySize; |
---|
2165 | |
---|
2166 | /* make sure the layout info is up to date */ |
---|
2167 | DiffviewUpdateLayout(dvPtr); |
---|
2168 | |
---|
2169 | /* update the limits of the current view */ |
---|
2170 | ySize = Tk_Height(dvPtr->tkwin) - 2*dvPtr->inset; |
---|
2171 | if (dvPtr->lineHeight > 0) { |
---|
2172 | dvPtr->topLine = dvPtr->yOffset/dvPtr->lineHeight; |
---|
2173 | dvPtr->btmLine = (dvPtr->yOffset + ySize)/dvPtr->lineHeight + 1; |
---|
2174 | dvPtr->fullLines = ySize/dvPtr->lineHeight; |
---|
2175 | } |
---|
2176 | |
---|
2177 | /* if there's no scroll command, then there's nothing left to do */ |
---|
2178 | if (dvPtr->yScrollCmd == NULL) { |
---|
2179 | return; |
---|
2180 | } |
---|
2181 | |
---|
2182 | if (dvPtr->maxHeight == 0) { |
---|
2183 | first = 0.0; |
---|
2184 | last = 1.0; |
---|
2185 | } else { |
---|
2186 | first = dvPtr->yOffset/((double)dvPtr->maxHeight); |
---|
2187 | last = (dvPtr->yOffset + ySize)/((double)dvPtr->maxHeight); |
---|
2188 | if (last > 1.0) { |
---|
2189 | last = 1.0; |
---|
2190 | } |
---|
2191 | } |
---|
2192 | sprintf(string, " %g %g", first, last); |
---|
2193 | |
---|
2194 | /* preserve/release the interp, in case it gets destroyed during the call */ |
---|
2195 | Tcl_Preserve((ClientData)dvPtr->interp); |
---|
2196 | |
---|
2197 | result = Tcl_VarEval(dvPtr->interp, dvPtr->yScrollCmd, string, |
---|
2198 | (char*)NULL); |
---|
2199 | if (result != TCL_OK) { |
---|
2200 | Tcl_AddErrorInfo(dvPtr->interp, |
---|
2201 | "\n (vertical scrolling command executed by diffview)"); |
---|
2202 | Tcl_BackgroundError(dvPtr->interp); |
---|
2203 | } |
---|
2204 | |
---|
2205 | Tcl_Release((ClientData)dvPtr->interp); |
---|
2206 | } |
---|
2207 | |
---|
2208 | /* |
---|
2209 | * ---------------------------------------------------------------------- |
---|
2210 | * DiffviewUpdateHScrollbar() |
---|
2211 | * |
---|
2212 | * Used to invoke the -xscrollcommand whenever the x-view has changed. |
---|
2213 | * This updates the scrollbar so that it shows the proper bubble. |
---|
2214 | * If there is no -xscrollcommand option, this does nothing. |
---|
2215 | * ---------------------------------------------------------------------- |
---|
2216 | */ |
---|
2217 | static void |
---|
2218 | DiffviewUpdateHScrollbar(dvPtr) |
---|
2219 | Diffview *dvPtr; /* widget data */ |
---|
2220 | { |
---|
2221 | char string[TCL_DOUBLE_SPACE*2 + 3]; |
---|
2222 | int result, viewWidth; |
---|
2223 | double first, last; |
---|
2224 | |
---|
2225 | /* make sure the layout info is up to date */ |
---|
2226 | DiffviewUpdateLayout(dvPtr); |
---|
2227 | |
---|
2228 | /* if there's no scroll command, then there's nothing left to do */ |
---|
2229 | if (dvPtr->xScrollCmd == NULL) { |
---|
2230 | return; |
---|
2231 | } |
---|
2232 | |
---|
2233 | viewWidth = Tk_Width(dvPtr->tkwin) - 2*dvPtr->inset; |
---|
2234 | if (dvPtr->maxWidth == 0) { |
---|
2235 | first = 0; |
---|
2236 | last = 1.0; |
---|
2237 | } else { |
---|
2238 | first = dvPtr->xOffset/((double)dvPtr->maxWidth); |
---|
2239 | last = (dvPtr->xOffset + viewWidth)/((double) dvPtr->maxWidth); |
---|
2240 | if (last > 1.0) { |
---|
2241 | last = 1.0; |
---|
2242 | } |
---|
2243 | } |
---|
2244 | sprintf(string, " %g %g", first, last); |
---|
2245 | |
---|
2246 | /* preserve/release the interp, in case it gets destroyed during the call */ |
---|
2247 | Tcl_Preserve((ClientData)dvPtr->interp); |
---|
2248 | |
---|
2249 | result = Tcl_VarEval(dvPtr->interp, dvPtr->xScrollCmd, string, |
---|
2250 | (char*)NULL); |
---|
2251 | if (result != TCL_OK) { |
---|
2252 | Tcl_AddErrorInfo(dvPtr->interp, |
---|
2253 | "\n (horizontal scrolling command executed by diffview)"); |
---|
2254 | Tcl_BackgroundError(dvPtr->interp); |
---|
2255 | } |
---|
2256 | |
---|
2257 | Tcl_Release((ClientData)dvPtr->interp); |
---|
2258 | } |
---|
2259 | |
---|
2260 | /* |
---|
2261 | * ---------------------------------------------------------------------- |
---|
2262 | * DiffviewLinesCreate() |
---|
2263 | * |
---|
2264 | * Used to breakup a Tcl string object into the indices for the start |
---|
2265 | * and end of each line. This is the first step in the computation |
---|
2266 | * of diffs and the world view of the widget. |
---|
2267 | * |
---|
2268 | * Returns a pointer to a description of the line geometry, which should |
---|
2269 | * be freed by calling DiffviewLinesFree() when it is no longer needed. |
---|
2270 | * ---------------------------------------------------------------------- |
---|
2271 | */ |
---|
2272 | static DiffviewLines* |
---|
2273 | DiffviewLinesCreate(textPtr, textLen) |
---|
2274 | char *textPtr; /* text string being broken up */ |
---|
2275 | int textLen; /* length of the string */ |
---|
2276 | { |
---|
2277 | int numLines = 0; |
---|
2278 | DiffviewLines *lineLimitsPtr; |
---|
2279 | char **newStarts; |
---|
2280 | int *newLens; |
---|
2281 | unsigned int len; |
---|
2282 | |
---|
2283 | lineLimitsPtr = (DiffviewLines*)ckalloc(sizeof(DiffviewLines)); |
---|
2284 | lineLimitsPtr->maxLines = 0; |
---|
2285 | lineLimitsPtr->startPtr = NULL; |
---|
2286 | lineLimitsPtr->lenPtr = NULL; |
---|
2287 | |
---|
2288 | while (textLen > 0) { |
---|
2289 | /* |
---|
2290 | * If we're out of space, double the size and copy existing |
---|
2291 | * info over. |
---|
2292 | */ |
---|
2293 | if (numLines >= lineLimitsPtr->maxLines) { |
---|
2294 | if (lineLimitsPtr->maxLines == 0) { |
---|
2295 | lineLimitsPtr->maxLines = 100; |
---|
2296 | } else { |
---|
2297 | lineLimitsPtr->maxLines *= 2; |
---|
2298 | } |
---|
2299 | |
---|
2300 | /* resize the start point array */ |
---|
2301 | newStarts = (char**)ckalloc(lineLimitsPtr->maxLines*sizeof(char*)); |
---|
2302 | if (lineLimitsPtr->startPtr) { |
---|
2303 | memcpy((VOID*)newStarts, (VOID*)lineLimitsPtr->startPtr, |
---|
2304 | numLines*sizeof(char*)); |
---|
2305 | ckfree((char*)lineLimitsPtr->startPtr); |
---|
2306 | } |
---|
2307 | lineLimitsPtr->startPtr = newStarts; |
---|
2308 | |
---|
2309 | /* resize the end point array */ |
---|
2310 | newLens = (int*)ckalloc(lineLimitsPtr->maxLines*sizeof(int)); |
---|
2311 | if (lineLimitsPtr->lenPtr) { |
---|
2312 | memcpy((VOID*)newLens, (VOID*)lineLimitsPtr->lenPtr, |
---|
2313 | numLines*sizeof(int)); |
---|
2314 | ckfree((char*)lineLimitsPtr->lenPtr); |
---|
2315 | } |
---|
2316 | lineLimitsPtr->lenPtr = newLens; |
---|
2317 | } |
---|
2318 | |
---|
2319 | /* mark the start of this line, then search for the end */ |
---|
2320 | lineLimitsPtr->startPtr[numLines] = textPtr; |
---|
2321 | lineLimitsPtr->lenPtr[numLines] = 0; |
---|
2322 | |
---|
2323 | while (*textPtr != '\n' && textLen > 0) { |
---|
2324 | textPtr++; textLen--; |
---|
2325 | } |
---|
2326 | if (textPtr > lineLimitsPtr->startPtr[numLines]) { |
---|
2327 | len = textPtr - lineLimitsPtr->startPtr[numLines]; |
---|
2328 | lineLimitsPtr->lenPtr[numLines] = len; |
---|
2329 | } |
---|
2330 | numLines++; |
---|
2331 | |
---|
2332 | /* skip over the newline and start with next line */ |
---|
2333 | if (*textPtr == '\n') { |
---|
2334 | textPtr++; textLen--; |
---|
2335 | } |
---|
2336 | } |
---|
2337 | lineLimitsPtr->numLines = numLines; |
---|
2338 | |
---|
2339 | return lineLimitsPtr; |
---|
2340 | } |
---|
2341 | |
---|
2342 | /* |
---|
2343 | * ---------------------------------------------------------------------- |
---|
2344 | * DiffviewLinesFree() |
---|
2345 | * |
---|
2346 | * Used to free up the data structure created by DiffviewLinesCreate(). |
---|
2347 | * ---------------------------------------------------------------------- |
---|
2348 | */ |
---|
2349 | static void |
---|
2350 | DiffviewLinesFree(lineLimitsPtr) |
---|
2351 | DiffviewLines *lineLimitsPtr; /* data structure being freed */ |
---|
2352 | { |
---|
2353 | if (lineLimitsPtr) { |
---|
2354 | if (lineLimitsPtr->startPtr) { |
---|
2355 | ckfree((char*)lineLimitsPtr->startPtr); |
---|
2356 | } |
---|
2357 | if (lineLimitsPtr->lenPtr) { |
---|
2358 | ckfree((char*)lineLimitsPtr->lenPtr); |
---|
2359 | } |
---|
2360 | ckfree((char*)lineLimitsPtr); |
---|
2361 | } |
---|
2362 | } |
---|
2363 | |
---|
2364 | /* |
---|
2365 | * ---------------------------------------------------------------------- |
---|
2366 | * DiffviewDiffsCreate() |
---|
2367 | * |
---|
2368 | * Considers two strings textPtr1 and textPtr2 (divided into segments |
---|
2369 | * according to limsPtr1 and limsPtr2), and computes the longest common |
---|
2370 | * subsequences between the two strings. This is the first step in |
---|
2371 | * computing the differences between the two strings. |
---|
2372 | * |
---|
2373 | * Returns a data structure that contains a series of "diff" operations. |
---|
2374 | * This should be freed when it is no longer needed by calling |
---|
2375 | * DiffviewDiffsFree(). |
---|
2376 | * |
---|
2377 | * REFERENCE: |
---|
2378 | * J. W. Hunt and M. D. McIlroy, "An algorithm for differential |
---|
2379 | * file comparison," Comp. Sci. Tech. Rep. #41, Bell Telephone |
---|
2380 | * Laboratories (1976). Available on the Web at the second |
---|
2381 | * author's personal site: http://www.cs.dartmouth.edu/~doug/ |
---|
2382 | * |
---|
2383 | * ---------------------------------------------------------------------- |
---|
2384 | */ |
---|
2385 | static DiffviewDiffs* |
---|
2386 | DiffviewDiffsCreate(textPtr1, limsPtr1, textPtr2, limsPtr2) |
---|
2387 | char *textPtr1; /* text from buffer #1 */ |
---|
2388 | DiffviewLines *limsPtr1; /* limits of individual strings in textPtr1 */ |
---|
2389 | char *textPtr2; /* text from buffer #2 */ |
---|
2390 | DiffviewLines *limsPtr2; /* limits of individual strings in textPtr2 */ |
---|
2391 | { |
---|
2392 | DiffviewDiffs *diffPtr = NULL; |
---|
2393 | |
---|
2394 | Tcl_HashTable eqv; |
---|
2395 | Tcl_HashSearch iter; |
---|
2396 | Tcl_HashEntry *entryPtr; |
---|
2397 | Tcl_DString buffer; |
---|
2398 | DiffviewSubseq *K, *newK, newCandidate; |
---|
2399 | int Kmax; int Klen; |
---|
2400 | Tcl_Obj *listPtr, **objv; |
---|
2401 | int i, j, candidateIdx, subseqLen, longestMatch; |
---|
2402 | int max, min, mid, midval, sLen, del; |
---|
2403 | int len, created, o, objc, index1, *lcsIndex1, index2, *lcsIndex2; |
---|
2404 | char *key; |
---|
2405 | |
---|
2406 | newCandidate.index1 = -1; /* Suppress compiler warning. */ |
---|
2407 | newCandidate.index2 = -1; |
---|
2408 | newCandidate.next = -1; |
---|
2409 | |
---|
2410 | /* |
---|
2411 | * Build a set of equivalence classes. Scan through all of |
---|
2412 | * buffer #2 and map each string to a list of indices for the |
---|
2413 | * lines that have that string. |
---|
2414 | */ |
---|
2415 | Tcl_DStringInit(&buffer); |
---|
2416 | Tcl_InitHashTable(&eqv, TCL_STRING_KEYS); |
---|
2417 | for (i=0; i < limsPtr2->numLines; i++) { |
---|
2418 | len = limsPtr2->lenPtr[i]; |
---|
2419 | Tcl_DStringSetLength(&buffer, len); |
---|
2420 | key = Tcl_DStringValue(&buffer); |
---|
2421 | memcpy((VOID*)key, (VOID*)limsPtr2->startPtr[i], len); |
---|
2422 | |
---|
2423 | entryPtr = Tcl_CreateHashEntry(&eqv, key, &created); |
---|
2424 | if (created) { |
---|
2425 | listPtr = Tcl_NewListObj(0, (Tcl_Obj**)NULL); |
---|
2426 | Tcl_IncrRefCount(listPtr); |
---|
2427 | Tcl_SetHashValue(entryPtr, (ClientData)listPtr); |
---|
2428 | } |
---|
2429 | |
---|
2430 | listPtr = (Tcl_Obj*)Tcl_GetHashValue(entryPtr); |
---|
2431 | Tcl_ListObjAppendElement((Tcl_Interp*)NULL, listPtr, Tcl_NewIntObj(i)); |
---|
2432 | } |
---|
2433 | |
---|
2434 | /* |
---|
2435 | * Build a list K that holds the descriptions of the common |
---|
2436 | * subsequences. At first, there is one common subsequence of |
---|
2437 | * length 0 with a fence that includes line -1 of both files. |
---|
2438 | */ |
---|
2439 | Kmax = 10; |
---|
2440 | K = (DiffviewSubseq*)ckalloc(Kmax*sizeof(DiffviewSubseq)); |
---|
2441 | K[0].index1 = -1; |
---|
2442 | K[0].index2 = -1; |
---|
2443 | K[0].next = -1; |
---|
2444 | K[1].index1 = limsPtr1->numLines; |
---|
2445 | K[1].index2 = limsPtr2->numLines; |
---|
2446 | K[1].next = -1; |
---|
2447 | Klen = 2; |
---|
2448 | longestMatch = 0; |
---|
2449 | |
---|
2450 | /* |
---|
2451 | * Step through the first buffer line by line. |
---|
2452 | */ |
---|
2453 | for (i=0; i < limsPtr1->numLines; i++) { |
---|
2454 | len = limsPtr1->lenPtr[i]; |
---|
2455 | Tcl_DStringSetLength(&buffer, len); |
---|
2456 | key = Tcl_DStringValue(&buffer); |
---|
2457 | memcpy((VOID*)key, (VOID*)limsPtr1->startPtr[i], len); |
---|
2458 | |
---|
2459 | /* look at each possible line j in second buffer */ |
---|
2460 | entryPtr = Tcl_FindHashEntry(&eqv, key); |
---|
2461 | if (entryPtr) { |
---|
2462 | subseqLen = 0; |
---|
2463 | candidateIdx = 0; |
---|
2464 | |
---|
2465 | listPtr = (Tcl_Obj*)Tcl_GetHashValue(entryPtr); |
---|
2466 | Tcl_ListObjGetElements((Tcl_Interp*)NULL, listPtr, &objc, &objv); |
---|
2467 | for (o=0; o < objc; o++) { |
---|
2468 | Tcl_GetIntFromObj((Tcl_Interp*)NULL, objv[o], &j); |
---|
2469 | |
---|
2470 | /* |
---|
2471 | * Binary search to find a candidate common subsequence. |
---|
2472 | * This match may get appended to that. |
---|
2473 | */ |
---|
2474 | max = longestMatch; |
---|
2475 | min = subseqLen; |
---|
2476 | mid = subseqLen; |
---|
2477 | sLen = longestMatch + 1; |
---|
2478 | while (max >= min) { |
---|
2479 | mid = (max+min)/2; |
---|
2480 | midval = K[mid].index2; |
---|
2481 | if (j == midval) { |
---|
2482 | break; |
---|
2483 | } else if (j < midval) { |
---|
2484 | max = mid-1; |
---|
2485 | } else { |
---|
2486 | sLen = mid; |
---|
2487 | min = mid+1; |
---|
2488 | } |
---|
2489 | } |
---|
2490 | |
---|
2491 | /* no good candidate? then go to the next match point */ |
---|
2492 | if (j == K[mid].index2 || sLen > longestMatch) { |
---|
2493 | continue; |
---|
2494 | } |
---|
2495 | |
---|
2496 | /* |
---|
2497 | * sLen = sequence length of the longest sequence that |
---|
2498 | * this match point can be appended to |
---|
2499 | * |
---|
2500 | * Make a new candidate match and store the old on in K. |
---|
2501 | * Set subseqLen to the length of the new candidate match. |
---|
2502 | */ |
---|
2503 | if (subseqLen >= 0) { |
---|
2504 | if (candidateIdx >= 0) { |
---|
2505 | K[subseqLen].index1 = K[candidateIdx].index1; |
---|
2506 | K[subseqLen].index2 = K[candidateIdx].index2; |
---|
2507 | K[subseqLen].next = K[candidateIdx].next; |
---|
2508 | } else { |
---|
2509 | K[subseqLen].index1 = newCandidate.index1; |
---|
2510 | K[subseqLen].index2 = newCandidate.index2; |
---|
2511 | K[subseqLen].next = newCandidate.next; |
---|
2512 | } |
---|
2513 | } |
---|
2514 | newCandidate.index1 = i; |
---|
2515 | newCandidate.index2 = j; |
---|
2516 | newCandidate.next = sLen; |
---|
2517 | candidateIdx = -1; /* use newCandidate info */ |
---|
2518 | subseqLen = sLen + 1; |
---|
2519 | |
---|
2520 | /* |
---|
2521 | * If we've extended the length of the longest match, |
---|
2522 | * we don't need to keep checking candidate lines. |
---|
2523 | * We're done. Move the fence. |
---|
2524 | */ |
---|
2525 | if (sLen >= longestMatch) { |
---|
2526 | if (Klen >= Kmax) { |
---|
2527 | Kmax *= 2; |
---|
2528 | newK = (DiffviewSubseq*)ckalloc(Kmax*sizeof(DiffviewSubseq)); |
---|
2529 | memcpy((VOID*)newK, (VOID*)K, Klen*sizeof(DiffviewSubseq)); |
---|
2530 | ckfree((char*)K); |
---|
2531 | K = newK; |
---|
2532 | } |
---|
2533 | K[Klen].index1 = K[Klen-1].index1; |
---|
2534 | K[Klen].index2 = K[Klen-1].index2; |
---|
2535 | K[Klen].next = K[Klen-1].next; |
---|
2536 | Klen++; |
---|
2537 | |
---|
2538 | longestMatch++; |
---|
2539 | break; |
---|
2540 | } |
---|
2541 | } |
---|
2542 | |
---|
2543 | /* put the last candidate into the array */ |
---|
2544 | if (candidateIdx >= 0) { |
---|
2545 | K[subseqLen].index1 = K[candidateIdx].index1; |
---|
2546 | K[subseqLen].index2 = K[candidateIdx].index2; |
---|
2547 | K[subseqLen].next = K[candidateIdx].next; |
---|
2548 | } else { |
---|
2549 | K[subseqLen].index1 = newCandidate.index1; |
---|
2550 | K[subseqLen].index2 = newCandidate.index2; |
---|
2551 | K[subseqLen].next = newCandidate.next; |
---|
2552 | } |
---|
2553 | } |
---|
2554 | } |
---|
2555 | |
---|
2556 | /* |
---|
2557 | * Translate the resulting info into a list of common subseq indices. |
---|
2558 | */ |
---|
2559 | lcsIndex1 = (int*)ckalloc(longestMatch*sizeof(int)); |
---|
2560 | memset((void*)lcsIndex1, 0, (longestMatch*sizeof(int))); |
---|
2561 | lcsIndex2 = (int*)ckalloc(longestMatch*sizeof(int)); |
---|
2562 | memset((void*)lcsIndex2, 0, (longestMatch*sizeof(int))); |
---|
2563 | len = longestMatch; |
---|
2564 | |
---|
2565 | candidateIdx = longestMatch; |
---|
2566 | while (K[candidateIdx].index1 >= 0) { |
---|
2567 | if (longestMatch-- < 0) { |
---|
2568 | Tcl_Panic("internal mismatch in diff algorithm"); |
---|
2569 | } |
---|
2570 | lcsIndex1[longestMatch] = K[candidateIdx].index1; |
---|
2571 | lcsIndex2[longestMatch] = K[candidateIdx].index2; |
---|
2572 | candidateIdx = K[candidateIdx].next; |
---|
2573 | } |
---|
2574 | |
---|
2575 | /* |
---|
2576 | * Now, march through all lines in both buffers and convert the |
---|
2577 | * lcs indices into a sequence of diff-style operations. |
---|
2578 | */ |
---|
2579 | diffPtr = (DiffviewDiffs*)ckalloc(sizeof(DiffviewDiffs)); |
---|
2580 | diffPtr->maxDiffs = 0; |
---|
2581 | diffPtr->numDiffs = 0; |
---|
2582 | diffPtr->ops = NULL; |
---|
2583 | |
---|
2584 | i = j = 0; |
---|
2585 | for (o=0; o < len; o++) { |
---|
2586 | index1 = lcsIndex1[o]; |
---|
2587 | index2 = lcsIndex2[o]; |
---|
2588 | |
---|
2589 | if (index1-i == index2-j && index1-i > 0) { |
---|
2590 | del = index1-i; |
---|
2591 | DiffviewDiffsAppend(diffPtr, 'c', i, i+del-1, j, j+del-1); |
---|
2592 | i += del; j += del; |
---|
2593 | } else { |
---|
2594 | del = index1-i; |
---|
2595 | if (del > 0) { |
---|
2596 | DiffviewDiffsAppend(diffPtr, 'd', i, i+del-1, j, j); |
---|
2597 | i += del; |
---|
2598 | } |
---|
2599 | |
---|
2600 | del = index2-j; |
---|
2601 | if (del > 0) { |
---|
2602 | DiffviewDiffsAppend(diffPtr, 'a', i, i, j, j+del-1); |
---|
2603 | j += del; |
---|
2604 | } |
---|
2605 | } |
---|
2606 | i++; j++; |
---|
2607 | } |
---|
2608 | |
---|
2609 | /* lines left over? mark as many "changed" as possible */ |
---|
2610 | if (limsPtr1->numLines-i > 0 && limsPtr2->numLines-j > 0) { |
---|
2611 | del = (limsPtr1->numLines-i < limsPtr2->numLines-j) |
---|
2612 | ? limsPtr1->numLines-i : limsPtr2->numLines-j; |
---|
2613 | DiffviewDiffsAppend(diffPtr, 'c', i, i+del-1, j, j+del-1); |
---|
2614 | i += del; |
---|
2615 | j += del; |
---|
2616 | } |
---|
2617 | |
---|
2618 | /* still have lines left over? then mark them added or deleted */ |
---|
2619 | if (i < limsPtr1->numLines) { |
---|
2620 | del = limsPtr1->numLines - i; |
---|
2621 | DiffviewDiffsAppend(diffPtr, 'd', i, i+del-1, j, j); |
---|
2622 | i += del; |
---|
2623 | } |
---|
2624 | if (j < limsPtr2->numLines) { |
---|
2625 | del = limsPtr2->numLines - j; |
---|
2626 | DiffviewDiffsAppend(diffPtr, 'a', i, i, j, j+del-1); |
---|
2627 | j += del; |
---|
2628 | } |
---|
2629 | |
---|
2630 | /* |
---|
2631 | * Clean up all memory used during the diff. |
---|
2632 | */ |
---|
2633 | ckfree((char*)K); |
---|
2634 | ckfree((char*)lcsIndex1); |
---|
2635 | ckfree((char*)lcsIndex2); |
---|
2636 | |
---|
2637 | entryPtr = Tcl_FirstHashEntry(&eqv, &iter); |
---|
2638 | while (entryPtr) { |
---|
2639 | listPtr = (Tcl_Obj*)Tcl_GetHashValue(entryPtr); |
---|
2640 | Tcl_DecrRefCount(listPtr); |
---|
2641 | entryPtr = Tcl_NextHashEntry(&iter); |
---|
2642 | } |
---|
2643 | Tcl_DeleteHashTable(&eqv); |
---|
2644 | |
---|
2645 | return diffPtr; |
---|
2646 | } |
---|
2647 | |
---|
2648 | /* |
---|
2649 | * ---------------------------------------------------------------------- |
---|
2650 | * DiffviewDiffsAppend() |
---|
2651 | * |
---|
2652 | * Appends a "diff" operation onto a list of diffs. The list is extended |
---|
2653 | * automatically, if need be, to store the new element. |
---|
2654 | * ---------------------------------------------------------------------- |
---|
2655 | */ |
---|
2656 | static void |
---|
2657 | DiffviewDiffsAppend(diffsPtr, op, fromIndex1, toIndex1, fromIndex2, toIndex2) |
---|
2658 | DiffviewDiffs *diffsPtr; /* diffs being updated */ |
---|
2659 | int op; /* diff operation: a/d/c */ |
---|
2660 | int fromIndex1; /* starts at this line in buffer 1 */ |
---|
2661 | int toIndex1; /* ends at this line in buffer 1 */ |
---|
2662 | int fromIndex2; /* starts at this line in buffer 2 */ |
---|
2663 | int toIndex2; /* ends at this line in buffer 2 */ |
---|
2664 | { |
---|
2665 | DiffviewDiffOp *newOpArray; |
---|
2666 | int last; |
---|
2667 | |
---|
2668 | if (diffsPtr->numDiffs >= diffsPtr->maxDiffs) { |
---|
2669 | if (diffsPtr->maxDiffs == 0) { |
---|
2670 | diffsPtr->maxDiffs = 10; |
---|
2671 | } else { |
---|
2672 | diffsPtr->maxDiffs *= 2; |
---|
2673 | } |
---|
2674 | newOpArray = (DiffviewDiffOp*)ckalloc( |
---|
2675 | diffsPtr->maxDiffs*sizeof(DiffviewDiffOp)); |
---|
2676 | |
---|
2677 | if (diffsPtr->ops) { |
---|
2678 | memcpy((VOID*)newOpArray, (VOID*)diffsPtr->ops, |
---|
2679 | diffsPtr->numDiffs*sizeof(DiffviewDiffOp)); |
---|
2680 | ckfree((char*)diffsPtr->ops); |
---|
2681 | } |
---|
2682 | diffsPtr->ops = newOpArray; |
---|
2683 | } |
---|
2684 | |
---|
2685 | last = diffsPtr->numDiffs; |
---|
2686 | diffsPtr->ops[last].op = op; |
---|
2687 | diffsPtr->ops[last].fromIndex1 = fromIndex1; |
---|
2688 | diffsPtr->ops[last].toIndex1 = toIndex1; |
---|
2689 | diffsPtr->ops[last].fromIndex2 = fromIndex2; |
---|
2690 | diffsPtr->ops[last].toIndex2 = toIndex2; |
---|
2691 | diffsPtr->numDiffs++; |
---|
2692 | } |
---|
2693 | |
---|
2694 | /* |
---|
2695 | * ---------------------------------------------------------------------- |
---|
2696 | * DiffviewDiffsFree() |
---|
2697 | * |
---|
2698 | * Frees up the storage previously created by calling |
---|
2699 | * DiffviewDiffsAppend(). |
---|
2700 | * ---------------------------------------------------------------------- |
---|
2701 | */ |
---|
2702 | static void |
---|
2703 | DiffviewDiffsFree(diffsPtr) |
---|
2704 | DiffviewDiffs *diffsPtr; /* diffs being freed */ |
---|
2705 | { |
---|
2706 | if (diffsPtr->ops) { |
---|
2707 | ckfree((char*)diffsPtr->ops); |
---|
2708 | } |
---|
2709 | ckfree((char*)diffsPtr); |
---|
2710 | } |
---|
2711 | |
---|
2712 | /* |
---|
2713 | * ---------------------------------------------------------------------- |
---|
2714 | * DiffviewLayoutAdd() |
---|
2715 | * |
---|
2716 | * Clears out the layout storage in preparation for building another |
---|
2717 | * layout. If the previous number of lines was much less than the |
---|
2718 | * maximum allocated, then this routine reallocates a smaller storage |
---|
2719 | * space. This provides a way to give back a large chunk of memory |
---|
2720 | * if the contents of the widget is nulled out, for example. |
---|
2721 | * ---------------------------------------------------------------------- |
---|
2722 | */ |
---|
2723 | static void |
---|
2724 | DiffviewLayoutAdd(layoutPtr, linePtr) |
---|
2725 | DiffviewLayout *layoutPtr; /* line layout being updated */ |
---|
2726 | DiffviewLayoutLine *linePtr; /* line being added to layout */ |
---|
2727 | { |
---|
2728 | DiffviewLayoutLine *newLineArray; |
---|
2729 | |
---|
2730 | /* expand the array as needed */ |
---|
2731 | if (layoutPtr->numLines >= layoutPtr->maxLines) { |
---|
2732 | if (layoutPtr->maxLines == 0) { |
---|
2733 | layoutPtr->maxLines = 100; |
---|
2734 | } else { |
---|
2735 | layoutPtr->maxLines *= 2; |
---|
2736 | } |
---|
2737 | newLineArray = (DiffviewLayoutLine*)ckalloc( |
---|
2738 | (unsigned)(layoutPtr->maxLines*sizeof(DiffviewLayoutLine))); |
---|
2739 | |
---|
2740 | if (layoutPtr->lines) { |
---|
2741 | memcpy((VOID*)newLineArray, (VOID*)layoutPtr->lines, |
---|
2742 | layoutPtr->numLines*sizeof(DiffviewLayoutLine)); |
---|
2743 | ckfree((char*)layoutPtr->lines); |
---|
2744 | } |
---|
2745 | layoutPtr->lines = newLineArray; |
---|
2746 | } |
---|
2747 | |
---|
2748 | /* copy the latest line in and bump the count */ |
---|
2749 | memcpy((VOID*)&layoutPtr->lines[layoutPtr->numLines], |
---|
2750 | (VOID*)linePtr, sizeof(DiffviewLayoutLine)); |
---|
2751 | |
---|
2752 | layoutPtr->numLines++; |
---|
2753 | } |
---|
2754 | |
---|
2755 | /* |
---|
2756 | * ---------------------------------------------------------------------- |
---|
2757 | * DiffviewLayoutClear() |
---|
2758 | * |
---|
2759 | * Clears out the layout storage in preparation for building another |
---|
2760 | * layout. If the previous number of lines was much less than the |
---|
2761 | * maximum allocated, then this routine reallocates a smaller storage |
---|
2762 | * space. This provides a way to give back a large chunk of memory |
---|
2763 | * if the contents of the widget is nulled out, for example. |
---|
2764 | * ---------------------------------------------------------------------- |
---|
2765 | */ |
---|
2766 | static void |
---|
2767 | DiffviewLayoutClear(layoutPtr) |
---|
2768 | DiffviewLayout *layoutPtr; /* line layout being freed */ |
---|
2769 | { |
---|
2770 | if (layoutPtr->numLines > 0 |
---|
2771 | && layoutPtr->numLines < layoutPtr->maxLines/3 |
---|
2772 | && layoutPtr->maxLines > 100) { |
---|
2773 | ckfree((char*)layoutPtr->lines); |
---|
2774 | layoutPtr->lines = (DiffviewLayoutLine*)ckalloc( |
---|
2775 | (unsigned)(layoutPtr->numLines * sizeof(DiffviewLayoutLine))); |
---|
2776 | layoutPtr->maxLines = layoutPtr->numLines; |
---|
2777 | } |
---|
2778 | layoutPtr->numLines = 0; |
---|
2779 | } |
---|
2780 | |
---|
2781 | /* |
---|
2782 | * ---------------------------------------------------------------------- |
---|
2783 | * DiffviewLayoutFree() |
---|
2784 | * |
---|
2785 | * Frees the storage associated with the layout of all lines within |
---|
2786 | * the widget. |
---|
2787 | * ---------------------------------------------------------------------- |
---|
2788 | */ |
---|
2789 | static void |
---|
2790 | DiffviewLayoutFree(layoutPtr) |
---|
2791 | DiffviewLayout *layoutPtr; /* line layout being freed */ |
---|
2792 | { |
---|
2793 | if (layoutPtr->lines) { |
---|
2794 | ckfree((char*)layoutPtr->lines); |
---|
2795 | layoutPtr->lines = NULL; |
---|
2796 | } |
---|
2797 | } |
---|