/[dtapublic]/projs/trunk/shared_source/c_tk_base_7_5_w_mods/tktext.c
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Revision 69 - (show annotations) (download)
Sat Nov 5 10:54:17 2016 UTC (6 years, 3 months ago) by dashley
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1 /* $Header$ */
2
3 /*
4 * tkText.c --
5 *
6 * This module provides a big chunk of the implementation of
7 * multi-line editable text widgets for Tk. Among other things,
8 * it provides the Tcl command interfaces to text widgets and
9 * the display code. The B-tree representation of text is
10 * implemented elsewhere.
11 *
12 * Copyright (c) 1992-1994 The Regents of the University of California.
13 * Copyright (c) 1994-1996 Sun Microsystems, Inc.
14 * Copyright (c) 1999 by Scriptics Corporation.
15 *
16 * See the file "license.terms" for information on usage and redistribution
17 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
18 *
19 * RCS: @(#) $Id: tktext.c,v 1.1.1.1 2001/06/13 05:08:42 dtashley Exp $
20 */
21
22 #include "default.h"
23 #include "tkPort.h"
24 #include "tkInt.h"
25
26 #ifdef MAC_TCL
27 #define Style TkStyle
28 #define DInfo TkDInfo
29 #endif
30
31 #include "tkText.h"
32
33 /*
34 * Custom options for handling "-state"
35 */
36
37 static Tk_CustomOption stateOption = {
38 (Tk_OptionParseProc *) TkStateParseProc,
39 TkStatePrintProc, (ClientData) NULL /* only "normal" and "disabled" */
40 };
41
42 /*
43 * Information used to parse text configuration options:
44 */
45
46 static Tk_ConfigSpec configSpecs[] = {
47 {TK_CONFIG_BORDER, "-background", "background", "Background",
48 DEF_TEXT_BG_COLOR, Tk_Offset(TkText, border), TK_CONFIG_COLOR_ONLY},
49 {TK_CONFIG_BORDER, "-background", "background", "Background",
50 DEF_TEXT_BG_MONO, Tk_Offset(TkText, border), TK_CONFIG_MONO_ONLY},
51 {TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
52 (char *) NULL, 0, 0},
53 {TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
54 (char *) NULL, 0, 0},
55 {TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
56 DEF_TEXT_BORDER_WIDTH, Tk_Offset(TkText, borderWidth), 0},
57 {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
58 DEF_TEXT_CURSOR, Tk_Offset(TkText, cursor), TK_CONFIG_NULL_OK},
59 {TK_CONFIG_BOOLEAN, "-exportselection", "exportSelection",
60 "ExportSelection", DEF_TEXT_EXPORT_SELECTION,
61 Tk_Offset(TkText, exportSelection), 0},
62 {TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
63 (char *) NULL, 0, 0},
64 {TK_CONFIG_FONT, "-font", "font", "Font",
65 DEF_TEXT_FONT, Tk_Offset(TkText, tkfont), 0},
66 {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
67 DEF_TEXT_FG, Tk_Offset(TkText, fgColor), 0},
68 {TK_CONFIG_PIXELS, "-height", "height", "Height",
69 DEF_TEXT_HEIGHT, Tk_Offset(TkText, height), 0},
70 {TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
71 "HighlightBackground", DEF_TEXT_HIGHLIGHT_BG,
72 Tk_Offset(TkText, highlightBgColorPtr), 0},
73 {TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
74 DEF_TEXT_HIGHLIGHT, Tk_Offset(TkText, highlightColorPtr), 0},
75 {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
76 "HighlightThickness",
77 DEF_TEXT_HIGHLIGHT_WIDTH, Tk_Offset(TkText, highlightWidth), 0},
78 {TK_CONFIG_BORDER, "-insertbackground", "insertBackground", "Foreground",
79 DEF_TEXT_INSERT_BG, Tk_Offset(TkText, insertBorder), 0},
80 {TK_CONFIG_PIXELS, "-insertborderwidth", "insertBorderWidth", "BorderWidth",
81 DEF_TEXT_INSERT_BD_COLOR, Tk_Offset(TkText, insertBorderWidth),
82 TK_CONFIG_COLOR_ONLY},
83 {TK_CONFIG_PIXELS, "-insertborderwidth", "insertBorderWidth", "BorderWidth",
84 DEF_TEXT_INSERT_BD_MONO, Tk_Offset(TkText, insertBorderWidth),
85 TK_CONFIG_MONO_ONLY},
86 {TK_CONFIG_INT, "-insertofftime", "insertOffTime", "OffTime",
87 DEF_TEXT_INSERT_OFF_TIME, Tk_Offset(TkText, insertOffTime), 0},
88 {TK_CONFIG_INT, "-insertontime", "insertOnTime", "OnTime",
89 DEF_TEXT_INSERT_ON_TIME, Tk_Offset(TkText, insertOnTime), 0},
90 {TK_CONFIG_PIXELS, "-insertwidth", "insertWidth", "InsertWidth",
91 DEF_TEXT_INSERT_WIDTH, Tk_Offset(TkText, insertWidth), 0},
92 {TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
93 DEF_TEXT_PADX, Tk_Offset(TkText, padX), 0},
94 {TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
95 DEF_TEXT_PADY, Tk_Offset(TkText, padY), 0},
96 {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
97 DEF_TEXT_RELIEF, Tk_Offset(TkText, relief), 0},
98 {TK_CONFIG_BORDER, "-selectbackground", "selectBackground", "Foreground",
99 DEF_TEXT_SELECT_COLOR, Tk_Offset(TkText, selBorder),
100 TK_CONFIG_COLOR_ONLY},
101 {TK_CONFIG_BORDER, "-selectbackground", "selectBackground", "Foreground",
102 DEF_TEXT_SELECT_MONO, Tk_Offset(TkText, selBorder),
103 TK_CONFIG_MONO_ONLY},
104 {TK_CONFIG_STRING, "-selectborderwidth", "selectBorderWidth", "BorderWidth",
105 DEF_TEXT_SELECT_BD_COLOR, Tk_Offset(TkText, selBdString),
106 TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK},
107 {TK_CONFIG_STRING, "-selectborderwidth", "selectBorderWidth", "BorderWidth",
108 DEF_TEXT_SELECT_BD_MONO, Tk_Offset(TkText, selBdString),
109 TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK},
110 {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
111 DEF_TEXT_SELECT_FG_COLOR, Tk_Offset(TkText, selFgColorPtr),
112 TK_CONFIG_COLOR_ONLY},
113 {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
114 DEF_TEXT_SELECT_FG_MONO, Tk_Offset(TkText, selFgColorPtr),
115 TK_CONFIG_MONO_ONLY},
116 {TK_CONFIG_BOOLEAN, "-setgrid", "setGrid", "SetGrid",
117 DEF_TEXT_SET_GRID, Tk_Offset(TkText, setGrid), 0},
118 {TK_CONFIG_PIXELS, "-spacing1", "spacing1", "Spacing",
119 DEF_TEXT_SPACING1, Tk_Offset(TkText, spacing1),
120 TK_CONFIG_DONT_SET_DEFAULT},
121 {TK_CONFIG_PIXELS, "-spacing2", "spacing2", "Spacing",
122 DEF_TEXT_SPACING2, Tk_Offset(TkText, spacing2),
123 TK_CONFIG_DONT_SET_DEFAULT},
124 {TK_CONFIG_PIXELS, "-spacing3", "spacing3", "Spacing",
125 DEF_TEXT_SPACING3, Tk_Offset(TkText, spacing3),
126 TK_CONFIG_DONT_SET_DEFAULT},
127 {TK_CONFIG_CUSTOM, "-state", "state", "State",
128 DEF_TEXT_STATE, Tk_Offset(TkText, state), 0, &stateOption},
129 {TK_CONFIG_STRING, "-tabs", "tabs", "Tabs",
130 DEF_TEXT_TABS, Tk_Offset(TkText, tabOptionString), TK_CONFIG_NULL_OK},
131 {TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
132 DEF_TEXT_TAKE_FOCUS, Tk_Offset(TkText, takeFocus),
133 TK_CONFIG_NULL_OK},
134 {TK_CONFIG_INT, "-width", "width", "Width",
135 DEF_TEXT_WIDTH, Tk_Offset(TkText, width), 0},
136 {TK_CONFIG_CUSTOM,
137 "-wrap", "wrap", "Wrap",
138 DEF_TEXT_WRAP,
139 Tk_Offset(TkText, wrapMode),
140 0,
141 &textWrapModeOption},
142 {TK_CONFIG_STRING, "-xscrollcommand", "xScrollCommand", "ScrollCommand",
143 DEF_TEXT_XSCROLL_COMMAND, Tk_Offset(TkText, xScrollCmd),
144 TK_CONFIG_NULL_OK},
145 {TK_CONFIG_STRING, "-yscrollcommand", "yScrollCommand", "ScrollCommand",
146 DEF_TEXT_YSCROLL_COMMAND, Tk_Offset(TkText, yScrollCmd),
147 TK_CONFIG_NULL_OK},
148 {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
149 (char *) NULL, 0, 0}
150 };
151
152 /*
153 * Boolean variable indicating whether or not special debugging code
154 * should be executed.
155 */
156
157 int tkTextDebug = 0;
158
159 /*
160 * Custom options for handling "-wrap":
161 */
162
163 static int WrapModeParseProc _ANSI_ARGS_((ClientData clientData,
164 Tcl_Interp *interp, Tk_Window tkwin, char *value,
165 char *widgRec, int offset));
166 static char * WrapModePrintProc _ANSI_ARGS_((ClientData clientData,
167 Tk_Window tkwin, char *widgRec, int offset,
168 Tcl_FreeProc **freeProcPtr));
169
170 Tk_CustomOption textWrapModeOption = {
171 WrapModeParseProc,
172 WrapModePrintProc,
173 (ClientData) NULL
174 };
175
176 /*
177 *--------------------------------------------------------------
178 *
179 * WrapModeParseProc --
180 *
181 * This procedure is invoked during option processing to handle
182 * "-wrap" options for text widgets.
183 *
184 * Results:
185 * A standard Tcl return value.
186 *
187 * Side effects:
188 * The wrap mode for a given item gets replaced by the wrap mode
189 * indicated in the value argument.
190 *
191 *--------------------------------------------------------------
192 */
193
194 static int
195 WrapModeParseProc(clientData, interp, tkwin, value, widgRec, offset)
196 ClientData clientData; /* some flags.*/
197 Tcl_Interp *interp; /* Used for reporting errors. */
198 Tk_Window tkwin; /* Window containing canvas widget. */
199 char *value; /* Value of option (list of tag
200 * names). */
201 char *widgRec; /* Pointer to record for item. */
202 int offset; /* Offset into item. */
203 {
204 int c;
205 size_t length;
206
207 register TkWrapMode *wrapPtr = (TkWrapMode *) (widgRec + offset);
208
209 if(value == NULL || *value == 0) {
210 *wrapPtr = TEXT_WRAPMODE_NULL;
211 return TCL_OK;
212 }
213
214 c = value[0];
215 length = strlen(value);
216
217 if ((c == 'c') && (strncmp(value, "char", length) == 0)) {
218 *wrapPtr = TEXT_WRAPMODE_CHAR;
219 return TCL_OK;
220 }
221 if ((c == 'n') && (strncmp(value, "none", length) == 0)) {
222 *wrapPtr = TEXT_WRAPMODE_NONE;
223 return TCL_OK;
224 }
225 if ((c == 'w') && (strncmp(value, "word", length) == 0)) {
226 *wrapPtr = TEXT_WRAPMODE_WORD;
227 return TCL_OK;
228 }
229 Tcl_AppendResult(interp, "bad wrap mode \"", value,
230 "\": must be char, none, or word",
231 (char *) NULL);
232 *wrapPtr = TEXT_WRAPMODE_CHAR;
233 return TCL_ERROR;
234 }
235
236 /*
237 *--------------------------------------------------------------
238 *
239 * WrapModePrintProc --
240 *
241 * This procedure is invoked by the Tk configuration code
242 * to produce a printable string for the "-wrap" configuration
243 * option for canvas items.
244 *
245 * Results:
246 * The return value is a string describing the state for
247 * the item referred to by "widgRec". In addition, *freeProcPtr
248 * is filled in with the address of a procedure to call to free
249 * the result string when it's no longer needed (or NULL to
250 * indicate that the string doesn't need to be freed).
251 *
252 * Side effects:
253 * None.
254 *
255 *--------------------------------------------------------------
256 */
257
258 static char *
259 WrapModePrintProc(clientData, tkwin, widgRec, offset, freeProcPtr)
260 ClientData clientData; /* Ignored. */
261 Tk_Window tkwin; /* Window containing canvas widget. */
262 char *widgRec; /* Pointer to record for item. */
263 int offset; /* Ignored. */
264 Tcl_FreeProc **freeProcPtr; /* Pointer to variable to fill in with
265 * information about how to reclaim
266 * storage for return string. */
267 {
268 register TkWrapMode *wrapPtr = (TkWrapMode *) (widgRec + offset);
269
270 if (*wrapPtr==TEXT_WRAPMODE_CHAR) {
271 return "char";
272 } else if (*wrapPtr==TEXT_WRAPMODE_NONE) {
273 return "none";
274 } else if (*wrapPtr==TEXT_WRAPMODE_WORD) {
275 return "word";
276 } else {
277 return "";
278 }
279 }
280
281 /*
282 * Forward declarations for procedures defined later in this file:
283 */
284
285 static int ConfigureText _ANSI_ARGS_((Tcl_Interp *interp,
286 TkText *textPtr, int argc, char **argv, int flags));
287 static int DeleteChars _ANSI_ARGS_((TkText *textPtr,
288 char *index1String, char *index2String));
289 static void DestroyText _ANSI_ARGS_((char *memPtr));
290 static void InsertChars _ANSI_ARGS_((TkText *textPtr,
291 TkTextIndex *indexPtr, char *string));
292 static void TextBlinkProc _ANSI_ARGS_((ClientData clientData));
293 static void TextCmdDeletedProc _ANSI_ARGS_((
294 ClientData clientData));
295 static void TextEventProc _ANSI_ARGS_((ClientData clientData,
296 XEvent *eventPtr));
297 static int TextFetchSelection _ANSI_ARGS_((ClientData clientData,
298 int offset, char *buffer, int maxBytes));
299 static int TextSearchCmd _ANSI_ARGS_((TkText *textPtr,
300 Tcl_Interp *interp, int argc, char **argv));
301 static int TextWidgetCmd _ANSI_ARGS_((ClientData clientData,
302 Tcl_Interp *interp, int argc, char **argv));
303 static void TextWorldChanged _ANSI_ARGS_((
304 ClientData instanceData));
305 static int TextDumpCmd _ANSI_ARGS_((TkText *textPtr,
306 Tcl_Interp *interp, int argc, char **argv));
307 static void DumpLine _ANSI_ARGS_((Tcl_Interp *interp,
308 TkText *textPtr, int what, TkTextLine *linePtr,
309 int start, int end, int lineno, char *command));
310 static int DumpSegment _ANSI_ARGS_((Tcl_Interp *interp, char *key,
311 char *value, char * command, TkTextIndex *index,
312 int what));
313
314 /*
315 * The structure below defines text class behavior by means of procedures
316 * that can be invoked from generic window code.
317 */
318
319 static TkClassProcs textClass = {
320 NULL, /* createProc. */
321 TextWorldChanged, /* geometryProc. */
322 NULL /* modalProc. */
323 };
324
325
326 /*
327 *--------------------------------------------------------------
328 *
329 * Tk_TextCmd --
330 *
331 * This procedure is invoked to process the "text" Tcl command.
332 * See the user documentation for details on what it does.
333 *
334 * Results:
335 * A standard Tcl result.
336 *
337 * Side effects:
338 * See the user documentation.
339 *
340 *--------------------------------------------------------------
341 */
342
343 int
344 Tk_TextCmd(clientData, interp, argc, argv)
345 ClientData clientData; /* Main window associated with
346 * interpreter. */
347 Tcl_Interp *interp; /* Current interpreter. */
348 int argc; /* Number of arguments. */
349 char **argv; /* Argument strings. */
350 {
351 Tk_Window tkwin = (Tk_Window) clientData;
352 Tk_Window new;
353 register TkText *textPtr;
354 TkTextIndex startIndex;
355
356 if (argc < 2) {
357 Tcl_AppendResult(interp, "wrong # args: should be \"",
358 argv[0], " pathName ?options?\"", (char *) NULL);
359 return TCL_ERROR;
360 }
361
362 /*
363 * Create the window.
364 */
365
366 new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
367 if (new == NULL) {
368 return TCL_ERROR;
369 }
370
371 textPtr = (TkText *) ckalloc(sizeof(TkText));
372 textPtr->tkwin = new;
373 textPtr->display = Tk_Display(new);
374 textPtr->interp = interp;
375 textPtr->widgetCmd = Tcl_CreateCommand(interp,
376 Tk_PathName(textPtr->tkwin), TextWidgetCmd,
377 (ClientData) textPtr, TextCmdDeletedProc);
378 textPtr->tree = TkBTreeCreate(textPtr);
379 Tcl_InitHashTable(&textPtr->tagTable, TCL_STRING_KEYS);
380 textPtr->numTags = 0;
381 Tcl_InitHashTable(&textPtr->markTable, TCL_STRING_KEYS);
382 Tcl_InitHashTable(&textPtr->windowTable, TCL_STRING_KEYS);
383 Tcl_InitHashTable(&textPtr->imageTable, TCL_STRING_KEYS);
384 textPtr->state = TK_STATE_NORMAL;
385 textPtr->border = NULL;
386 textPtr->borderWidth = 0;
387 textPtr->padX = 0;
388 textPtr->padY = 0;
389 textPtr->relief = TK_RELIEF_FLAT;
390 textPtr->highlightWidth = 0;
391 textPtr->highlightBgColorPtr = NULL;
392 textPtr->highlightColorPtr = NULL;
393 textPtr->cursor = None;
394 textPtr->fgColor = NULL;
395 textPtr->tkfont = NULL;
396 textPtr->charWidth = 1;
397 textPtr->spacing1 = 0;
398 textPtr->spacing2 = 0;
399 textPtr->spacing3 = 0;
400 textPtr->tabOptionString = NULL;
401 textPtr->tabArrayPtr = NULL;
402 textPtr->wrapMode = TEXT_WRAPMODE_CHAR;
403 textPtr->width = 0;
404 textPtr->height = 0;
405 textPtr->setGrid = 0;
406 textPtr->prevWidth = Tk_Width(new);
407 textPtr->prevHeight = Tk_Height(new);
408 TkTextCreateDInfo(textPtr);
409 TkTextMakeByteIndex(textPtr->tree, 0, 0, &startIndex);
410 TkTextSetYView(textPtr, &startIndex, 0);
411 textPtr->selTagPtr = NULL;
412 textPtr->selBorder = NULL;
413 textPtr->selBdString = NULL;
414 textPtr->selFgColorPtr = NULL;
415 textPtr->exportSelection = 1;
416 textPtr->abortSelections = 0;
417 textPtr->insertMarkPtr = NULL;
418 textPtr->insertBorder = NULL;
419 textPtr->insertWidth = 0;
420 textPtr->insertBorderWidth = 0;
421 textPtr->insertOnTime = 0;
422 textPtr->insertOffTime = 0;
423 textPtr->insertBlinkHandler = (Tcl_TimerToken) NULL;
424 textPtr->bindingTable = NULL;
425 textPtr->currentMarkPtr = NULL;
426 textPtr->pickEvent.type = LeaveNotify;
427 textPtr->pickEvent.xcrossing.x = 0;
428 textPtr->pickEvent.xcrossing.y = 0;
429 textPtr->numCurTags = 0;
430 textPtr->curTagArrayPtr = NULL;
431 textPtr->takeFocus = NULL;
432 textPtr->xScrollCmd = NULL;
433 textPtr->yScrollCmd = NULL;
434 textPtr->flags = 0;
435
436 /*
437 * Create the "sel" tag and the "current" and "insert" marks.
438 */
439
440 textPtr->selTagPtr = TkTextCreateTag(textPtr, "sel");
441 textPtr->selTagPtr->reliefString =
442 (char *) ckalloc(sizeof(DEF_TEXT_SELECT_RELIEF));
443 strcpy(textPtr->selTagPtr->reliefString, DEF_TEXT_SELECT_RELIEF);
444 textPtr->selTagPtr->relief = TK_RELIEF_RAISED;
445 textPtr->currentMarkPtr = TkTextSetMark(textPtr, "current", &startIndex);
446 textPtr->insertMarkPtr = TkTextSetMark(textPtr, "insert", &startIndex);
447
448 Tk_SetClass(textPtr->tkwin, "Text");
449 TkSetClassProcs(textPtr->tkwin, &textClass, (ClientData) textPtr);
450 Tk_CreateEventHandler(textPtr->tkwin,
451 ExposureMask|StructureNotifyMask|FocusChangeMask,
452 TextEventProc, (ClientData) textPtr);
453 Tk_CreateEventHandler(textPtr->tkwin, KeyPressMask|KeyReleaseMask
454 |ButtonPressMask|ButtonReleaseMask|EnterWindowMask
455 |LeaveWindowMask|PointerMotionMask|VirtualEventMask,
456 TkTextBindProc, (ClientData) textPtr);
457 Tk_CreateSelHandler(textPtr->tkwin, XA_PRIMARY, XA_STRING,
458 TextFetchSelection, (ClientData) textPtr, XA_STRING);
459 if (ConfigureText(interp, textPtr, argc-2, argv+2, 0) != TCL_OK) {
460 Tk_DestroyWindow(textPtr->tkwin);
461 return TCL_ERROR;
462 }
463 Tcl_SetResult(interp, Tk_PathName(textPtr->tkwin), TCL_STATIC);
464
465 return TCL_OK;
466 }
467
468 /*
469 *--------------------------------------------------------------
470 *
471 * TextWidgetCmd --
472 *
473 * This procedure is invoked to process the Tcl command
474 * that corresponds to a text widget. See the user
475 * documentation for details on what it does.
476 *
477 * Results:
478 * A standard Tcl result.
479 *
480 * Side effects:
481 * See the user documentation.
482 *
483 *--------------------------------------------------------------
484 */
485
486 static int
487 TextWidgetCmd(clientData, interp, argc, argv)
488 ClientData clientData; /* Information about text widget. */
489 Tcl_Interp *interp; /* Current interpreter. */
490 int argc; /* Number of arguments. */
491 char **argv; /* Argument strings. */
492 {
493 register TkText *textPtr = (TkText *) clientData;
494 int result = TCL_OK;
495 size_t length;
496 int c;
497 TkTextIndex index1, index2;
498
499 if (argc < 2) {
500 Tcl_AppendResult(interp, "wrong # args: should be \"",
501 argv[0], " option ?arg arg ...?\"", (char *) NULL);
502 return TCL_ERROR;
503 }
504 Tcl_Preserve((ClientData) textPtr);
505 c = argv[1][0];
506 length = strlen(argv[1]);
507 if ((c == 'b') && (strncmp(argv[1], "bbox", length) == 0)) {
508 int x, y, width, height;
509
510 if (argc != 3) {
511 Tcl_AppendResult(interp, "wrong # args: should be \"",
512 argv[0], " bbox index\"", (char *) NULL);
513 result = TCL_ERROR;
514 goto done;
515 }
516 if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
517 result = TCL_ERROR;
518 goto done;
519 }
520 if (TkTextCharBbox(textPtr, &index1, &x, &y, &width, &height) == 0) {
521 char buf[TCL_INTEGER_SPACE * 4];
522
523 sprintf(buf, "%d %d %d %d", x, y, width, height);
524 Tcl_SetResult(interp, buf, TCL_VOLATILE);
525 }
526 } else if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
527 && (length >= 2)) {
528 if (argc != 3) {
529 Tcl_AppendResult(interp, "wrong # args: should be \"",
530 argv[0], " cget option\"",
531 (char *) NULL);
532 result = TCL_ERROR;
533 goto done;
534 }
535 result = Tk_ConfigureValue(interp, textPtr->tkwin, configSpecs,
536 (char *) textPtr, argv[2], 0);
537 } else if ((c == 'c') && (strncmp(argv[1], "compare", length) == 0)
538 && (length >= 3)) {
539 int relation, value;
540 char *p;
541
542 if (argc != 5) {
543 Tcl_AppendResult(interp, "wrong # args: should be \"",
544 argv[0], " compare index1 op index2\"", (char *) NULL);
545 result = TCL_ERROR;
546 goto done;
547 }
548 if ((TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK)
549 || (TkTextGetIndex(interp, textPtr, argv[4], &index2)
550 != TCL_OK)) {
551 result = TCL_ERROR;
552 goto done;
553 }
554 relation = TkTextIndexCmp(&index1, &index2);
555 p = argv[3];
556 if (p[0] == '<') {
557 value = (relation < 0);
558 if ((p[1] == '=') && (p[2] == 0)) {
559 value = (relation <= 0);
560 } else if (p[1] != 0) {
561 compareError:
562 Tcl_AppendResult(interp, "bad comparison operator \"",
563 argv[3], "\": must be <, <=, ==, >=, >, or !=",
564 (char *) NULL);
565 result = TCL_ERROR;
566 goto done;
567 }
568 } else if (p[0] == '>') {
569 value = (relation > 0);
570 if ((p[1] == '=') && (p[2] == 0)) {
571 value = (relation >= 0);
572 } else if (p[1] != 0) {
573 goto compareError;
574 }
575 } else if ((p[0] == '=') && (p[1] == '=') && (p[2] == 0)) {
576 value = (relation == 0);
577 } else if ((p[0] == '!') && (p[1] == '=') && (p[2] == 0)) {
578 value = (relation != 0);
579 } else {
580 goto compareError;
581 }
582 Tcl_SetResult(interp, ((value) ? "1" : "0"), TCL_STATIC);
583 } else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
584 && (length >= 3)) {
585 if (argc == 2) {
586 result = Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs,
587 (char *) textPtr, (char *) NULL, 0);
588 } else if (argc == 3) {
589 result = Tk_ConfigureInfo(interp, textPtr->tkwin, configSpecs,
590 (char *) textPtr, argv[2], 0);
591 } else {
592 result = ConfigureText(interp, textPtr, argc-2, argv+2,
593 TK_CONFIG_ARGV_ONLY);
594 }
595 } else if ((c == 'd') && (strncmp(argv[1], "debug", length) == 0)
596 && (length >= 3)) {
597 if (argc > 3) {
598 Tcl_AppendResult(interp, "wrong # args: should be \"",
599 argv[0], " debug boolean\"", (char *) NULL);
600 result = TCL_ERROR;
601 goto done;
602 }
603 if (argc == 2) {
604 Tcl_SetResult(interp, ((tkBTreeDebug) ? "1" : "0"), TCL_STATIC);
605 } else {
606 if (Tcl_GetBoolean(interp, argv[2], &tkBTreeDebug) != TCL_OK) {
607 result = TCL_ERROR;
608 goto done;
609 }
610 tkTextDebug = tkBTreeDebug;
611 }
612 } else if ((c == 'd') && (strncmp(argv[1], "delete", length) == 0)
613 && (length >= 3)) {
614 if ((argc != 3) && (argc != 4)) {
615 Tcl_AppendResult(interp, "wrong # args: should be \"",
616 argv[0], " delete index1 ?index2?\"", (char *) NULL);
617 result = TCL_ERROR;
618 goto done;
619 }
620 if (textPtr->state == TK_STATE_NORMAL) {
621 result = DeleteChars(textPtr, argv[2],
622 (argc == 4) ? argv[3] : (char *) NULL);
623 }
624 } else if ((c == 'd') && (strncmp(argv[1], "dlineinfo", length) == 0)
625 && (length >= 2)) {
626 int x, y, width, height, base;
627
628 if (argc != 3) {
629 Tcl_AppendResult(interp, "wrong # args: should be \"",
630 argv[0], " dlineinfo index\"", (char *) NULL);
631 result = TCL_ERROR;
632 goto done;
633 }
634 if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
635 result = TCL_ERROR;
636 goto done;
637 }
638 if (TkTextDLineInfo(textPtr, &index1, &x, &y, &width, &height, &base)
639 == 0) {
640 char buf[TCL_INTEGER_SPACE * 5];
641
642 sprintf(buf, "%d %d %d %d %d", x, y, width, height, base);
643 Tcl_SetResult(interp, buf, TCL_VOLATILE);
644 }
645 } else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) {
646 if ((argc != 3) && (argc != 4)) {
647 Tcl_AppendResult(interp, "wrong # args: should be \"",
648 argv[0], " get index1 ?index2?\"", (char *) NULL);
649 result = TCL_ERROR;
650 goto done;
651 }
652 if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
653 result = TCL_ERROR;
654 goto done;
655 }
656 if (argc == 3) {
657 index2 = index1;
658 TkTextIndexForwChars(&index2, 1, &index2);
659 } else if (TkTextGetIndex(interp, textPtr, argv[3], &index2)
660 != TCL_OK) {
661 result = TCL_ERROR;
662 goto done;
663 }
664 if (TkTextIndexCmp(&index1, &index2) >= 0) {
665 goto done;
666 }
667 while (1) {
668 int offset, last, savedChar;
669 TkTextSegment *segPtr;
670
671 segPtr = TkTextIndexToSeg(&index1, &offset);
672 last = segPtr->size;
673 if (index1.linePtr == index2.linePtr) {
674 int last2;
675
676 if (index2.byteIndex == index1.byteIndex) {
677 break;
678 }
679 last2 = index2.byteIndex - index1.byteIndex + offset;
680 if (last2 < last) {
681 last = last2;
682 }
683 }
684 if (segPtr->typePtr == &tkTextCharType) {
685 savedChar = segPtr->body.chars[last];
686 segPtr->body.chars[last] = 0;
687 Tcl_AppendResult(interp, segPtr->body.chars + offset,
688 (char *) NULL);
689 segPtr->body.chars[last] = savedChar;
690 }
691 TkTextIndexForwBytes(&index1, last-offset, &index1);
692 }
693 } else if ((c == 'i') && (strncmp(argv[1], "index", length) == 0)
694 && (length >= 3)) {
695 char buf[200];
696
697 if (argc != 3) {
698 Tcl_AppendResult(interp, "wrong # args: should be \"",
699 argv[0], " index index\"",
700 (char *) NULL);
701 result = TCL_ERROR;
702 goto done;
703 }
704 if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
705 result = TCL_ERROR;
706 goto done;
707 }
708 TkTextPrintIndex(&index1, buf);
709 Tcl_SetResult(interp, buf, TCL_VOLATILE);
710 } else if ((c == 'i') && (strncmp(argv[1], "insert", length) == 0)
711 && (length >= 3)) {
712 int i, j, numTags;
713 char **tagNames;
714 TkTextTag **oldTagArrayPtr;
715
716 if (argc < 4) {
717 Tcl_AppendResult(interp, "wrong # args: should be \"",
718 argv[0],
719 " insert index chars ?tagList chars tagList ...?\"",
720 (char *) NULL);
721 result = TCL_ERROR;
722 goto done;
723 }
724 if (TkTextGetIndex(interp, textPtr, argv[2], &index1) != TCL_OK) {
725 result = TCL_ERROR;
726 goto done;
727 }
728 if (textPtr->state == TK_STATE_NORMAL) {
729 for (j = 3; j < argc; j += 2) {
730 InsertChars(textPtr, &index1, argv[j]);
731 if (argc > (j+1)) {
732 TkTextIndexForwBytes(&index1, (int) strlen(argv[j]),
733 &index2);
734 oldTagArrayPtr = TkBTreeGetTags(&index1, &numTags);
735 if (oldTagArrayPtr != NULL) {
736 for (i = 0; i < numTags; i++) {
737 TkBTreeTag(&index1, &index2, oldTagArrayPtr[i], 0);
738 }
739 ckfree((char *) oldTagArrayPtr);
740 }
741 if (Tcl_SplitList(interp, argv[j+1], &numTags, &tagNames)
742 != TCL_OK) {
743 result = TCL_ERROR;
744 goto done;
745 }
746 for (i = 0; i < numTags; i++) {
747 TkBTreeTag(&index1, &index2,
748 TkTextCreateTag(textPtr, tagNames[i]), 1);
749 }
750 ckfree((char *) tagNames);
751 index1 = index2;
752 }
753 }
754 }
755 } else if ((c == 'd') && (strncmp(argv[1], "dump", length) == 0)) {
756 result = TextDumpCmd(textPtr, interp, argc, argv);
757 } else if ((c == 'i') && (strncmp(argv[1], "image", length) == 0)) {
758 result = TkTextImageCmd(textPtr, interp, argc, argv);
759 } else if ((c == 'm') && (strncmp(argv[1], "mark", length) == 0)) {
760 result = TkTextMarkCmd(textPtr, interp, argc, argv);
761 } else if ((c == 's') && (strcmp(argv[1], "scan") == 0) && (length >= 2)) {
762 result = TkTextScanCmd(textPtr, interp, argc, argv);
763 } else if ((c == 's') && (strcmp(argv[1], "search") == 0)
764 && (length >= 3)) {
765 result = TextSearchCmd(textPtr, interp, argc, argv);
766 } else if ((c == 's') && (strcmp(argv[1], "see") == 0) && (length >= 3)) {
767 result = TkTextSeeCmd(textPtr, interp, argc, argv);
768 } else if ((c == 't') && (strcmp(argv[1], "tag") == 0)) {
769 result = TkTextTagCmd(textPtr, interp, argc, argv);
770 } else if ((c == 'w') && (strncmp(argv[1], "window", length) == 0)) {
771 result = TkTextWindowCmd(textPtr, interp, argc, argv);
772 } else if ((c == 'x') && (strncmp(argv[1], "xview", length) == 0)) {
773 result = TkTextXviewCmd(textPtr, interp, argc, argv);
774 } else if ((c == 'y') && (strncmp(argv[1], "yview", length) == 0)
775 && (length >= 2)) {
776 result = TkTextYviewCmd(textPtr, interp, argc, argv);
777 } else {
778 Tcl_AppendResult(interp, "bad option \"", argv[1],
779 "\": must be bbox, cget, compare, configure, debug, delete, ",
780 "dlineinfo, dump, get, image, index, insert, mark, scan, ",
781 "search, see, tag, window, xview, or yview",
782 (char *) NULL);
783 result = TCL_ERROR;
784 }
785
786 done:
787 Tcl_Release((ClientData) textPtr);
788 return result;
789 }
790
791 /*
792 *----------------------------------------------------------------------
793 *
794 * DestroyText --
795 *
796 * This procedure is invoked by Tcl_EventuallyFree or Tcl_Release
797 * to clean up the internal structure of a text at a safe time
798 * (when no-one is using it anymore).
799 *
800 * Results:
801 * None.
802 *
803 * Side effects:
804 * Everything associated with the text is freed up.
805 *
806 *----------------------------------------------------------------------
807 */
808
809 static void
810 DestroyText(memPtr)
811 char *memPtr; /* Info about text widget. */
812 {
813 register TkText *textPtr = (TkText *) memPtr;
814 Tcl_HashSearch search;
815 Tcl_HashEntry *hPtr;
816 TkTextTag *tagPtr;
817
818 /*
819 * Free up all the stuff that requires special handling, then
820 * let Tk_FreeOptions handle all the standard option-related
821 * stuff. Special note: free up display-related information
822 * before deleting the B-tree, since display-related stuff
823 * may refer to stuff in the B-tree.
824 */
825
826 TkTextFreeDInfo(textPtr);
827 TkBTreeDestroy(textPtr->tree);
828 for (hPtr = Tcl_FirstHashEntry(&textPtr->tagTable, &search);
829 hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
830 tagPtr = (TkTextTag *) Tcl_GetHashValue(hPtr);
831 TkTextFreeTag(textPtr, tagPtr);
832 }
833 Tcl_DeleteHashTable(&textPtr->tagTable);
834 for (hPtr = Tcl_FirstHashEntry(&textPtr->markTable, &search);
835 hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
836 ckfree((char *) Tcl_GetHashValue(hPtr));
837 }
838 Tcl_DeleteHashTable(&textPtr->markTable);
839 if (textPtr->tabArrayPtr != NULL) {
840 ckfree((char *) textPtr->tabArrayPtr);
841 }
842 if (textPtr->insertBlinkHandler != NULL) {
843 Tcl_DeleteTimerHandler(textPtr->insertBlinkHandler);
844 }
845 if (textPtr->bindingTable != NULL) {
846 Tk_DeleteBindingTable(textPtr->bindingTable);
847 }
848
849 /*
850 * NOTE: do NOT free up selBorder, selBdString, or selFgColorPtr:
851 * they are duplicates of information in the "sel" tag, which was
852 * freed up as part of deleting the tags above.
853 */
854
855 textPtr->selBorder = NULL;
856 textPtr->selBdString = NULL;
857 textPtr->selFgColorPtr = NULL;
858 Tk_FreeOptions(configSpecs, (char *) textPtr, textPtr->display, 0);
859 ckfree((char *) textPtr);
860 }
861
862 /*
863 *----------------------------------------------------------------------
864 *
865 * ConfigureText --
866 *
867 * This procedure is called to process an argv/argc list, plus
868 * the Tk option database, in order to configure (or
869 * reconfigure) a text widget.
870 *
871 * Results:
872 * The return value is a standard Tcl result. If TCL_ERROR is
873 * returned, then the interp's result contains an error message.
874 *
875 * Side effects:
876 * Configuration information, such as text string, colors, font,
877 * etc. get set for textPtr; old resources get freed, if there
878 * were any.
879 *
880 *----------------------------------------------------------------------
881 */
882
883 static int
884 ConfigureText(interp, textPtr, argc, argv, flags)
885 Tcl_Interp *interp; /* Used for error reporting. */
886 register TkText *textPtr; /* Information about widget; may or may
887 * not already have values for some fields. */
888 int argc; /* Number of valid entries in argv. */
889 char **argv; /* Arguments. */
890 int flags; /* Flags to pass to Tk_ConfigureWidget. */
891 {
892 int oldExport = textPtr->exportSelection;
893
894 if (Tk_ConfigureWidget(interp, textPtr->tkwin, configSpecs,
895 argc, argv, (char *) textPtr, flags) != TCL_OK) {
896 return TCL_ERROR;
897 }
898
899 /*
900 * A few other options also need special processing, such as parsing
901 * the geometry and setting the background from a 3-D border.
902 */
903
904 Tk_SetBackgroundFromBorder(textPtr->tkwin, textPtr->border);
905
906 /*
907 * Don't allow negative spacings.
908 */
909
910 if (textPtr->spacing1 < 0) {
911 textPtr->spacing1 = 0;
912 }
913 if (textPtr->spacing2 < 0) {
914 textPtr->spacing2 = 0;
915 }
916 if (textPtr->spacing3 < 0) {
917 textPtr->spacing3 = 0;
918 }
919
920 /*
921 * Parse tab stops.
922 */
923
924 if (textPtr->tabArrayPtr != NULL) {
925 ckfree((char *) textPtr->tabArrayPtr);
926 textPtr->tabArrayPtr = NULL;
927 }
928 if (textPtr->tabOptionString != NULL) {
929 textPtr->tabArrayPtr = TkTextGetTabs(interp, textPtr->tkwin,
930 textPtr->tabOptionString);
931 if (textPtr->tabArrayPtr == NULL) {
932 Tcl_AddErrorInfo(interp,"\n (while processing -tabs option)");
933 return TCL_ERROR;
934 }
935 }
936
937 /*
938 * Make sure that configuration options are properly mirrored
939 * between the widget record and the "sel" tags. NOTE: we don't
940 * have to free up information during the mirroring; old
941 * information was freed when it was replaced in the widget
942 * record.
943 */
944
945 textPtr->selTagPtr->border = textPtr->selBorder;
946 if (textPtr->selTagPtr->bdString != textPtr->selBdString) {
947 textPtr->selTagPtr->bdString = textPtr->selBdString;
948 if (textPtr->selBdString != NULL) {
949 if (Tk_GetPixels(interp, textPtr->tkwin, textPtr->selBdString,
950 &textPtr->selTagPtr->borderWidth) != TCL_OK) {
951 return TCL_ERROR;
952 }
953 if (textPtr->selTagPtr->borderWidth < 0) {
954 textPtr->selTagPtr->borderWidth = 0;
955 }
956 }
957 }
958 textPtr->selTagPtr->fgColor = textPtr->selFgColorPtr;
959 textPtr->selTagPtr->affectsDisplay = 0;
960 if ((textPtr->selTagPtr->border != NULL)
961 || (textPtr->selTagPtr->bdString != NULL)
962 || (textPtr->selTagPtr->reliefString != NULL)
963 || (textPtr->selTagPtr->bgStipple != None)
964 || (textPtr->selTagPtr->fgColor != NULL)
965 || (textPtr->selTagPtr->tkfont != None)
966 || (textPtr->selTagPtr->fgStipple != None)
967 || (textPtr->selTagPtr->justifyString != NULL)
968 || (textPtr->selTagPtr->lMargin1String != NULL)
969 || (textPtr->selTagPtr->lMargin2String != NULL)
970 || (textPtr->selTagPtr->offsetString != NULL)
971 || (textPtr->selTagPtr->overstrikeString != NULL)
972 || (textPtr->selTagPtr->rMarginString != NULL)
973 || (textPtr->selTagPtr->spacing1String != NULL)
974 || (textPtr->selTagPtr->spacing2String != NULL)
975 || (textPtr->selTagPtr->spacing3String != NULL)
976 || (textPtr->selTagPtr->tabString != NULL)
977 || (textPtr->selTagPtr->underlineString != NULL)
978 || (textPtr->selTagPtr->elideString != NULL)
979 || (textPtr->selTagPtr->wrapMode != TEXT_WRAPMODE_NULL)) {
980 textPtr->selTagPtr->affectsDisplay = 1;
981 }
982 TkTextRedrawTag(textPtr, (TkTextIndex *) NULL, (TkTextIndex *) NULL,
983 textPtr->selTagPtr, 1);
984
985 /*
986 * Claim the selection if we've suddenly started exporting it and there
987 * are tagged characters.
988 */
989
990 if (textPtr->exportSelection && (!oldExport)) {
991 TkTextSearch search;
992 TkTextIndex first, last;
993
994 TkTextMakeByteIndex(textPtr->tree, 0, 0, &first);
995 TkTextMakeByteIndex(textPtr->tree,
996 TkBTreeNumLines(textPtr->tree), 0, &last);
997 TkBTreeStartSearch(&first, &last, textPtr->selTagPtr, &search);
998 if (TkBTreeCharTagged(&first, textPtr->selTagPtr)
999 || TkBTreeNextTag(&search)) {
1000 Tk_OwnSelection(textPtr->tkwin, XA_PRIMARY, TkTextLostSelection,
1001 (ClientData) textPtr);
1002 textPtr->flags |= GOT_SELECTION;
1003 }
1004 }
1005
1006 /*
1007 * Register the desired geometry for the window, and arrange for
1008 * the window to be redisplayed.
1009 */
1010
1011 if (textPtr->width <= 0) {
1012 textPtr->width = 1;
1013 }
1014 if (textPtr->height <= 0) {
1015 textPtr->height = 1;
1016 }
1017 TextWorldChanged((ClientData) textPtr);
1018 return TCL_OK;
1019 }
1020
1021 /*
1022 *---------------------------------------------------------------------------
1023 *
1024 * TextWorldChanged --
1025 *
1026 * This procedure is called when the world has changed in some
1027 * way and the widget needs to recompute all its graphics contexts
1028 * and determine its new geometry.
1029 *
1030 * Results:
1031 * None.
1032 *
1033 * Side effects:
1034 * Configures all tags in the Text with a empty argc/argv, for
1035 * the side effect of causing all the items to recompute their
1036 * geometry and to be redisplayed.
1037 *
1038 *---------------------------------------------------------------------------
1039 */
1040
1041 static void
1042 TextWorldChanged(instanceData)
1043 ClientData instanceData; /* Information about widget. */
1044 {
1045 TkText *textPtr;
1046 Tk_FontMetrics fm;
1047
1048 textPtr = (TkText *) instanceData;
1049
1050 textPtr->charWidth = Tk_TextWidth(textPtr->tkfont, "0", 1);
1051 if (textPtr->charWidth <= 0) {
1052 textPtr->charWidth = 1;
1053 }
1054 Tk_GetFontMetrics(textPtr->tkfont, &fm);
1055 Tk_GeometryRequest(textPtr->tkwin,
1056 textPtr->width * textPtr->charWidth + 2*textPtr->borderWidth
1057 + 2*textPtr->padX + 2*textPtr->highlightWidth,
1058 textPtr->height * (fm.linespace + textPtr->spacing1
1059 + textPtr->spacing3) + 2*textPtr->borderWidth
1060 + 2*textPtr->padY + 2*textPtr->highlightWidth);
1061 Tk_SetInternalBorder(textPtr->tkwin,
1062 textPtr->borderWidth + textPtr->highlightWidth);
1063 if (textPtr->setGrid) {
1064 Tk_SetGrid(textPtr->tkwin, textPtr->width, textPtr->height,
1065 textPtr->charWidth, fm.linespace);
1066 } else {
1067 Tk_UnsetGrid(textPtr->tkwin);
1068 }
1069
1070 TkTextRelayoutWindow(textPtr);
1071 }
1072
1073 /*
1074 *--------------------------------------------------------------
1075 *
1076 * TextEventProc --
1077 *
1078 * This procedure is invoked by the Tk dispatcher on
1079 * structure changes to a text. For texts with 3D
1080 * borders, this procedure is also invoked for exposures.
1081 *
1082 * Results:
1083 * None.
1084 *
1085 * Side effects:
1086 * When the window gets deleted, internal structures get
1087 * cleaned up. When it gets exposed, it is redisplayed.
1088 *
1089 *--------------------------------------------------------------
1090 */
1091
1092 static void
1093 TextEventProc(clientData, eventPtr)
1094 ClientData clientData; /* Information about window. */
1095 register XEvent *eventPtr; /* Information about event. */
1096 {
1097 register TkText *textPtr = (TkText *) clientData;
1098 TkTextIndex index, index2;
1099
1100 if (eventPtr->type == Expose) {
1101 TkTextRedrawRegion(textPtr, eventPtr->xexpose.x,
1102 eventPtr->xexpose.y, eventPtr->xexpose.width,
1103 eventPtr->xexpose.height);
1104 } else if (eventPtr->type == ConfigureNotify) {
1105 if ((textPtr->prevWidth != Tk_Width(textPtr->tkwin))
1106 || (textPtr->prevHeight != Tk_Height(textPtr->tkwin))) {
1107 TkTextRelayoutWindow(textPtr);
1108 textPtr->prevWidth = Tk_Width(textPtr->tkwin);
1109 textPtr->prevHeight = Tk_Height(textPtr->tkwin);
1110 }
1111 } else if (eventPtr->type == DestroyNotify) {
1112 if (textPtr->tkwin != NULL) {
1113 if (textPtr->setGrid) {
1114 Tk_UnsetGrid(textPtr->tkwin);
1115 }
1116 textPtr->tkwin = NULL;
1117 Tcl_DeleteCommandFromToken(textPtr->interp,
1118 textPtr->widgetCmd);
1119 }
1120 Tcl_EventuallyFree((ClientData) textPtr, DestroyText);
1121 } else if ((eventPtr->type == FocusIn) || (eventPtr->type == FocusOut)) {
1122 if (eventPtr->xfocus.detail != NotifyInferior) {
1123 Tcl_DeleteTimerHandler(textPtr->insertBlinkHandler);
1124 if (eventPtr->type == FocusIn) {
1125 textPtr->flags |= GOT_FOCUS | INSERT_ON;
1126 if (textPtr->insertOffTime != 0) {
1127 textPtr->insertBlinkHandler = Tcl_CreateTimerHandler(
1128 textPtr->insertOnTime, TextBlinkProc,
1129 (ClientData) textPtr);
1130 }
1131 } else {
1132 textPtr->flags &= ~(GOT_FOCUS | INSERT_ON);
1133 textPtr->insertBlinkHandler = (Tcl_TimerToken) NULL;
1134 }
1135 #ifndef ALWAYS_SHOW_SELECTION
1136 TkTextRedrawTag(textPtr, NULL, NULL, textPtr->selTagPtr, 1);
1137 #endif
1138 TkTextMarkSegToIndex(textPtr, textPtr->insertMarkPtr, &index);
1139 TkTextIndexForwChars(&index, 1, &index2);
1140 TkTextChanged(textPtr, &index, &index2);
1141 if (textPtr->highlightWidth > 0) {
1142 TkTextRedrawRegion(textPtr, 0, 0, textPtr->highlightWidth,
1143 textPtr->highlightWidth);
1144 }
1145 }
1146 }
1147 }
1148
1149 /*
1150 *----------------------------------------------------------------------
1151 *
1152 * TextCmdDeletedProc --
1153 *
1154 * This procedure is invoked when a widget command is deleted. If
1155 * the widget isn't already in the process of being destroyed,
1156 * this command destroys it.
1157 *
1158 * Results:
1159 * None.
1160 *
1161 * Side effects:
1162 * The widget is destroyed.
1163 *
1164 *----------------------------------------------------------------------
1165 */
1166
1167 static void
1168 TextCmdDeletedProc(clientData)
1169 ClientData clientData; /* Pointer to widget record for widget. */
1170 {
1171 TkText *textPtr = (TkText *) clientData;
1172 Tk_Window tkwin = textPtr->tkwin;
1173
1174 /*
1175 * This procedure could be invoked either because the window was
1176 * destroyed and the command was then deleted (in which case tkwin
1177 * is NULL) or because the command was deleted, and then this procedure
1178 * destroys the widget.
1179 */
1180
1181 if (tkwin != NULL) {
1182 if (textPtr->setGrid) {
1183 Tk_UnsetGrid(textPtr->tkwin);
1184 }
1185 textPtr->tkwin = NULL;
1186 Tk_DestroyWindow(tkwin);
1187 }
1188 }
1189
1190 /*
1191 *----------------------------------------------------------------------
1192 *
1193 * InsertChars --
1194 *
1195 * This procedure implements most of the functionality of the
1196 * "insert" widget command.
1197 *
1198 * Results:
1199 * None.
1200 *
1201 * Side effects:
1202 * The characters in "string" get added to the text just before
1203 * the character indicated by "indexPtr".
1204 *
1205 *----------------------------------------------------------------------
1206 */
1207
1208 static void
1209 InsertChars(textPtr, indexPtr, string)
1210 TkText *textPtr; /* Overall information about text widget. */
1211 TkTextIndex *indexPtr; /* Where to insert new characters. May be
1212 * modified and/or invalidated. */
1213 char *string; /* Null-terminated string containing new
1214 * information to add to text. */
1215 {
1216 int lineIndex, resetView, offset;
1217 TkTextIndex newTop;
1218
1219 /*
1220 * Don't allow insertions on the last (dummy) line of the text.
1221 */
1222
1223 lineIndex = TkBTreeLineIndex(indexPtr->linePtr);
1224 if (lineIndex == TkBTreeNumLines(textPtr->tree)) {
1225 lineIndex--;
1226 TkTextMakeByteIndex(textPtr->tree, lineIndex, 1000000, indexPtr);
1227 }
1228
1229 /*
1230 * Notify the display module that lines are about to change, then do
1231 * the insertion. If the insertion occurs on the top line of the
1232 * widget (textPtr->topIndex), then we have to recompute topIndex
1233 * after the insertion, since the insertion could invalidate it.
1234 */
1235
1236 resetView = offset = 0;
1237 if (indexPtr->linePtr == textPtr->topIndex.linePtr) {
1238 resetView = 1;
1239 offset = textPtr->topIndex.byteIndex;
1240 if (offset > indexPtr->byteIndex) {
1241 offset += strlen(string);
1242 }
1243 }
1244 TkTextChanged(textPtr, indexPtr, indexPtr);
1245 TkBTreeInsertChars(indexPtr, string);
1246 if (resetView) {
1247 TkTextMakeByteIndex(textPtr->tree, lineIndex, 0, &newTop);
1248 TkTextIndexForwBytes(&newTop, offset, &newTop);
1249 TkTextSetYView(textPtr, &newTop, 0);
1250 }
1251
1252 /*
1253 * Invalidate any selection retrievals in progress.
1254 */
1255
1256 textPtr->abortSelections = 1;
1257 }
1258
1259 /*
1260 *----------------------------------------------------------------------
1261 *
1262 * DeleteChars --
1263 *
1264 * This procedure implements most of the functionality of the
1265 * "delete" widget command.
1266 *
1267 * Results:
1268 * Returns a standard Tcl result, and leaves an error message
1269 * in textPtr->interp if there is an error.
1270 *
1271 * Side effects:
1272 * Characters get deleted from the text.
1273 *
1274 *----------------------------------------------------------------------
1275 */
1276
1277 static int
1278 DeleteChars(textPtr, index1String, index2String)
1279 TkText *textPtr; /* Overall information about text widget. */
1280 char *index1String; /* String describing location of first
1281 * character to delete. */
1282 char *index2String; /* String describing location of last
1283 * character to delete. NULL means just
1284 * delete the one character given by
1285 * index1String. */
1286 {
1287 int line1, line2, line, byteIndex, resetView;
1288 TkTextIndex index1, index2;
1289
1290 /*
1291 * Parse the starting and stopping indices.
1292 */
1293
1294 if (TkTextGetIndex(textPtr->interp, textPtr, index1String, &index1)
1295 != TCL_OK) {
1296 return TCL_ERROR;
1297 }
1298 if (index2String != NULL) {
1299 if (TkTextGetIndex(textPtr->interp, textPtr, index2String, &index2)
1300 != TCL_OK) {
1301 return TCL_ERROR;
1302 }
1303 } else {
1304 index2 = index1;
1305 TkTextIndexForwChars(&index2, 1, &index2);
1306 }
1307
1308 /*
1309 * Make sure there's really something to delete.
1310 */
1311
1312 if (TkTextIndexCmp(&index1, &index2) >= 0) {
1313 return TCL_OK;
1314 }
1315
1316 /*
1317 * The code below is ugly, but it's needed to make sure there
1318 * is always a dummy empty line at the end of the text. If the
1319 * final newline of the file (just before the dummy line) is being
1320 * deleted, then back up index to just before the newline. If
1321 * there is a newline just before the first character being deleted,
1322 * then back up the first index too, so that an even number of lines
1323 * gets deleted. Furthermore, remove any tags that are present on
1324 * the newline that isn't going to be deleted after all (this simulates
1325 * deleting the newline and then adding a "clean" one back again).
1326 */
1327
1328 line1 = TkBTreeLineIndex(index1.linePtr);
1329 line2 = TkBTreeLineIndex(index2.linePtr);
1330 if (line2 == TkBTreeNumLines(textPtr->tree)) {
1331 TkTextTag **arrayPtr;
1332 int arraySize, i;
1333 TkTextIndex oldIndex2;
1334
1335 oldIndex2 = index2;
1336 TkTextIndexBackChars(&oldIndex2, 1, &index2);
1337 line2--;
1338 if ((index1.byteIndex == 0) && (line1 != 0)) {
1339 TkTextIndexBackChars(&index1, 1, &index1);
1340 line1--;
1341 }
1342 arrayPtr = TkBTreeGetTags(&index2, &arraySize);
1343 if (arrayPtr != NULL) {
1344 for (i = 0; i < arraySize; i++) {
1345 TkBTreeTag(&index2, &oldIndex2, arrayPtr[i], 0);
1346 }
1347 ckfree((char *) arrayPtr);
1348 }
1349 }
1350
1351 /*
1352 * Tell the display what's about to happen so it can discard
1353 * obsolete display information, then do the deletion. Also,
1354 * if the deletion involves the top line on the screen, then
1355 * we have to reset the view (the deletion will invalidate
1356 * textPtr->topIndex). Compute what the new first character
1357 * will be, then do the deletion, then reset the view.
1358 */
1359
1360 TkTextChanged(textPtr, &index1, &index2);
1361 resetView = 0;
1362 line = 0;
1363 byteIndex = 0;
1364 if (TkTextIndexCmp(&index2, &textPtr->topIndex) >= 0) {
1365 if (TkTextIndexCmp(&index1, &textPtr->topIndex) <= 0) {
1366 /*
1367 * Deletion range straddles topIndex: use the beginning
1368 * of the range as the new topIndex.
1369 */
1370
1371 resetView = 1;
1372 line = line1;
1373 byteIndex = index1.byteIndex;
1374 } else if (index1.linePtr == textPtr->topIndex.linePtr) {
1375 /*
1376 * Deletion range starts on top line but after topIndex.
1377 * Use the current topIndex as the new one.
1378 */
1379
1380 resetView = 1;
1381 line = line1;
1382 byteIndex = textPtr->topIndex.byteIndex;
1383 }
1384 } else if (index2.linePtr == textPtr->topIndex.linePtr) {
1385 /*
1386 * Deletion range ends on top line but before topIndex.
1387 * Figure out what will be the new character index for
1388 * the character currently pointed to by topIndex.
1389 */
1390
1391 resetView = 1;
1392 line = line2;
1393 byteIndex = textPtr->topIndex.byteIndex;
1394 if (index1.linePtr != index2.linePtr) {
1395 byteIndex -= index2.byteIndex;
1396 } else {
1397 byteIndex -= (index2.byteIndex - index1.byteIndex);
1398 }
1399 }
1400 TkBTreeDeleteChars(&index1, &index2);
1401 if (resetView) {
1402 TkTextMakeByteIndex(textPtr->tree, line, byteIndex, &index1);
1403 TkTextSetYView(textPtr, &index1, 0);
1404 }
1405
1406 /*
1407 * Invalidate any selection retrievals in progress.
1408 */
1409
1410 textPtr->abortSelections = 1;
1411
1412 return TCL_OK;
1413 }
1414
1415 /*
1416 *----------------------------------------------------------------------
1417 *
1418 * TextFetchSelection --
1419 *
1420 * This procedure is called back by Tk when the selection is
1421 * requested by someone. It returns part or all of the selection
1422 * in a buffer provided by the caller.
1423 *
1424 * Results:
1425 * The return value is the number of non-NULL bytes stored
1426 * at buffer. Buffer is filled (or partially filled) with a
1427 * NULL-terminated string containing part or all of the selection,
1428 * as given by offset and maxBytes.
1429 *
1430 * Side effects:
1431 * None.
1432 *
1433 *----------------------------------------------------------------------
1434 */
1435
1436 static int
1437 TextFetchSelection(clientData, offset, buffer, maxBytes)
1438 ClientData clientData; /* Information about text widget. */
1439 int offset; /* Offset within selection of first
1440 * character to be returned. */
1441 char *buffer; /* Location in which to place
1442 * selection. */
1443 int maxBytes; /* Maximum number of bytes to place
1444 * at buffer, not including terminating
1445 * NULL character. */
1446 {
1447 register TkText *textPtr = (TkText *) clientData;
1448 TkTextIndex eof;
1449 int count, chunkSize, offsetInSeg;
1450 TkTextSearch search;
1451 TkTextSegment *segPtr;
1452
1453 if (!textPtr->exportSelection) {
1454 return -1;
1455 }
1456
1457 /*
1458 * Find the beginning of the next range of selected text. Note: if
1459 * the selection is being retrieved in multiple pieces (offset != 0)
1460 * and some modification has been made to the text that affects the
1461 * selection then reject the selection request (make 'em start over
1462 * again).
1463 */
1464
1465 if (offset == 0) {
1466 TkTextMakeByteIndex(textPtr->tree, 0, 0, &textPtr->selIndex);
1467 textPtr->abortSelections = 0;
1468 } else if (textPtr->abortSelections) {
1469 return 0;
1470 }
1471 TkTextMakeByteIndex(textPtr->tree, TkBTreeNumLines(textPtr->tree), 0, &eof);
1472 TkBTreeStartSearch(&textPtr->selIndex, &eof, textPtr->selTagPtr, &search);
1473 if (!TkBTreeCharTagged(&textPtr->selIndex, textPtr->selTagPtr)) {
1474 if (!TkBTreeNextTag(&search)) {
1475 if (offset == 0) {
1476 return -1;
1477 } else {
1478 return 0;
1479 }
1480 }
1481 textPtr->selIndex = search.curIndex;
1482 }
1483
1484 /*
1485 * Each iteration through the outer loop below scans one selected range.
1486 * Each iteration through the inner loop scans one segment in the
1487 * selected range.
1488 */
1489
1490 count = 0;
1491 while (1) {
1492 /*
1493 * Find the end of the current range of selected text.
1494 */
1495
1496 if (!TkBTreeNextTag(&search)) {
1497 panic("TextFetchSelection couldn't find end of range");
1498 }
1499
1500 /*
1501 * Copy information from character segments into the buffer
1502 * until either we run out of space in the buffer or we get
1503 * to the end of this range of text.
1504 */
1505
1506 while (1) {
1507 if (maxBytes == 0) {
1508 goto done;
1509 }
1510 segPtr = TkTextIndexToSeg(&textPtr->selIndex, &offsetInSeg);
1511 chunkSize = segPtr->size - offsetInSeg;
1512 if (chunkSize > maxBytes) {
1513 chunkSize = maxBytes;
1514 }
1515 if (textPtr->selIndex.linePtr == search.curIndex.linePtr) {
1516 int leftInRange;
1517
1518 leftInRange = search.curIndex.byteIndex
1519 - textPtr->selIndex.byteIndex;
1520 if (leftInRange < chunkSize) {
1521 chunkSize = leftInRange;
1522 if (chunkSize <= 0) {
1523 break;
1524 }
1525 }
1526 }
1527 if ((segPtr->typePtr == &tkTextCharType)
1528 && !TkTextIsElided(textPtr, &textPtr->selIndex)) {
1529 memcpy((VOID *) buffer, (VOID *) (segPtr->body.chars
1530 + offsetInSeg), (size_t) chunkSize);
1531 buffer += chunkSize;
1532 maxBytes -= chunkSize;
1533 count += chunkSize;
1534 }
1535 TkTextIndexForwBytes(&textPtr->selIndex, chunkSize,
1536 &textPtr->selIndex);
1537 }
1538
1539 /*
1540 * Find the beginning of the next range of selected text.
1541 */
1542
1543 if (!TkBTreeNextTag(&search)) {
1544 break;
1545 }
1546 textPtr->selIndex = search.curIndex;
1547 }
1548
1549 done:
1550 *buffer = 0;
1551 return count;
1552 }
1553
1554 /*
1555 *----------------------------------------------------------------------
1556 *
1557 * TkTextLostSelection --
1558 *
1559 * This procedure is called back by Tk when the selection is
1560 * grabbed away from a text widget. On Windows and Mac systems, we
1561 * want to remember the selection for the next time the focus
1562 * enters the window. On Unix, just remove the "sel" tag from
1563 * everything in the widget.
1564 *
1565 * Results:
1566 * None.
1567 *
1568 * Side effects:
1569 * The "sel" tag is cleared from the window.
1570 *
1571 *----------------------------------------------------------------------
1572 */
1573
1574 void
1575 TkTextLostSelection(clientData)
1576 ClientData clientData; /* Information about text widget. */
1577 {
1578 register TkText *textPtr = (TkText *) clientData;
1579 #ifdef ALWAYS_SHOW_SELECTION
1580 TkTextIndex start, end;
1581
1582 if (!textPtr->exportSelection) {
1583 return;
1584 }
1585
1586 /*
1587 * On Windows and Mac systems, we want to remember the selection
1588 * for the next time the focus enters the window. On Unix,
1589 * just remove the "sel" tag from everything in the widget.
1590 */
1591
1592 TkTextMakeByteIndex(textPtr->tree, 0, 0, &start);
1593 TkTextMakeByteIndex(textPtr->tree, TkBTreeNumLines(textPtr->tree), 0, &end);
1594 TkTextRedrawTag(textPtr, &start, &end, textPtr->selTagPtr, 1);
1595 TkBTreeTag(&start, &end, textPtr->selTagPtr, 0);
1596 #endif
1597 textPtr->flags &= ~GOT_SELECTION;
1598 }
1599
1600 /*
1601 *----------------------------------------------------------------------
1602 *
1603 * TextBlinkProc --
1604 *
1605 * This procedure is called as a timer handler to blink the
1606 * insertion cursor off and on.
1607 *
1608 * Results:
1609 * None.
1610 *
1611 * Side effects:
1612 * The cursor gets turned on or off, redisplay gets invoked,
1613 * and this procedure reschedules itself.
1614 *
1615 *----------------------------------------------------------------------
1616 */
1617
1618 static void
1619 TextBlinkProc(clientData)
1620 ClientData clientData; /* Pointer to record describing text. */
1621 {
1622 register TkText *textPtr = (TkText *) clientData;
1623 TkTextIndex index;
1624 int x, y, w, h;
1625
1626 if ((textPtr->state == TK_STATE_DISABLED) ||
1627 !(textPtr->flags & GOT_FOCUS) || (textPtr->insertOffTime == 0)) {
1628 return;
1629 }
1630 if (textPtr->flags & INSERT_ON) {
1631 textPtr->flags &= ~INSERT_ON;
1632 textPtr->insertBlinkHandler = Tcl_CreateTimerHandler(
1633 textPtr->insertOffTime, TextBlinkProc, (ClientData) textPtr);
1634 } else {
1635 textPtr->flags |= INSERT_ON;
1636 textPtr->insertBlinkHandler = Tcl_CreateTimerHandler(
1637 textPtr->insertOnTime, TextBlinkProc, (ClientData) textPtr);
1638 }
1639 TkTextMarkSegToIndex(textPtr, textPtr->insertMarkPtr, &index);
1640 TkTextCharBbox(textPtr, &index, &x, &y, &w, &h);
1641 TkTextRedrawRegion(textPtr, x - textPtr->insertWidth / 2, y,
1642 textPtr->insertWidth, h);
1643 }
1644
1645 /*
1646 *----------------------------------------------------------------------
1647 *
1648 * TextSearchCmd --
1649 *
1650 * This procedure is invoked to process the "search" widget command
1651 * for text widgets. See the user documentation for details on what
1652 * it does.
1653 *
1654 * Results:
1655 * A standard Tcl result.
1656 *
1657 * Side effects:
1658 * See the user documentation.
1659 *
1660 *----------------------------------------------------------------------
1661 */
1662
1663 static int
1664 TextSearchCmd(textPtr, interp, argc, argv)
1665 TkText *textPtr; /* Information about text widget. */
1666 Tcl_Interp *interp; /* Current interpreter. */
1667 int argc; /* Number of arguments. */
1668 char **argv; /* Argument strings. */
1669 {
1670 int backwards, exact, searchElide, c, i, argsLeft, noCase, leftToScan;
1671 size_t length;
1672 int numLines, startingLine, startingByte, lineNum, firstByte, lastByte;
1673 int code, matchLength, matchByte, passes, stopLine, searchWholeText;
1674 int patLength;
1675 char *arg, *pattern, *varName, *p, *startOfLine;
1676 char buffer[20];
1677 TkTextIndex index, stopIndex;
1678 Tcl_DString line, patDString;
1679 TkTextSegment *segPtr;
1680 TkTextLine *linePtr;
1681 TkTextIndex curIndex;
1682 Tcl_RegExp regexp = NULL; /* Initialization needed only to
1683 * prevent compiler warning. */
1684
1685 /*
1686 * Parse switches and other arguments.
1687 */
1688
1689 exact = 1;
1690 searchElide = 0;
1691 curIndex.tree = textPtr->tree;
1692 backwards = 0;
1693 noCase = 0;
1694 varName = NULL;
1695 for (i = 2; i < argc; i++) {
1696 arg = argv[i];
1697 if (arg[0] != '-') {
1698 break;
1699 }
1700 length = strlen(arg);
1701 if (length < 2) {
1702 badSwitch:
1703 Tcl_AppendResult(interp, "bad switch \"", arg,
1704 "\": must be --, -backward, -count, -elide, -exact, ",
1705 "-forward, -nocase, or -regexp", (char *) NULL);
1706 return TCL_ERROR;
1707 }
1708 c = arg[1];
1709 if ((c == 'b') && (strncmp(argv[i], "-backwards", length) == 0)) {
1710 backwards = 1;
1711 } else if ((c == 'c') && (strncmp(argv[i], "-count", length) == 0)) {
1712 if (i >= (argc-1)) {
1713 Tcl_SetResult(interp, "no value given for \"-count\" option",
1714 TCL_STATIC);
1715 return TCL_ERROR;
1716 }
1717 i++;
1718 varName = argv[i];
1719 } else if ((c == 'e') && (length > 2)
1720 && (strncmp(argv[i], "-exact", length) == 0)) {
1721 exact = 1;
1722 } else if ((c == 'e') && (length > 2)
1723 && (strncmp(argv[i], "-elide", length) == 0)) {
1724 searchElide = 1;
1725 } else if ((c == 'h') && (strncmp(argv[i], "-hidden", length) == 0)) {
1726 /*
1727 * -hidden is kept around for backwards compatibility with
1728 * the dash patch, but -elide is the official option
1729 */
1730 searchElide = 1;
1731 } else if ((c == 'f') && (strncmp(argv[i], "-forwards", length) == 0)) {
1732 backwards = 0;
1733 } else if ((c == 'n') && (strncmp(argv[i], "-nocase", length) == 0)) {
1734 noCase = 1;
1735 } else if ((c == 'r') && (strncmp(argv[i], "-regexp", length) == 0)) {
1736 exact = 0;
1737 } else if ((c == '-') && (strncmp(argv[i], "--", length) == 0)) {
1738 i++;
1739 break;
1740 } else {
1741 goto badSwitch;
1742 }
1743 }
1744 argsLeft = argc - (i+2);
1745 if ((argsLeft != 0) && (argsLeft != 1)) {
1746 Tcl_AppendResult(interp, "wrong # args: should be \"",
1747 argv[0], " search ?switches? pattern index ?stopIndex?\"",
1748 (char *) NULL);
1749 return TCL_ERROR;
1750 }
1751 pattern = argv[i];
1752
1753 /*
1754 * Convert the pattern to lower-case if we're supposed to ignore case.
1755 */
1756
1757 if (noCase) {
1758 Tcl_DStringInit(&patDString);
1759 Tcl_DStringAppend(&patDString, pattern, -1);
1760 pattern = Tcl_DStringValue(&patDString);
1761 Tcl_UtfToLower(pattern);
1762 }
1763
1764 Tcl_DStringInit(&line);
1765 if (TkTextGetIndex(interp, textPtr, argv[i+1], &index) != TCL_OK) {
1766 code = TCL_ERROR;
1767 goto done;
1768 }
1769 numLines = TkBTreeNumLines(textPtr->tree);
1770 startingLine = TkBTreeLineIndex(index.linePtr);
1771 startingByte = index.byteIndex;
1772 if (startingLine >= numLines) {
1773 if (backwards) {
1774 startingLine = TkBTreeNumLines(textPtr->tree) - 1;
1775 startingByte = TkBTreeBytesInLine(TkBTreeFindLine(textPtr->tree,
1776 startingLine));
1777 } else {
1778 startingLine = 0;
1779 startingByte = 0;
1780 }
1781 }
1782 if (argsLeft == 1) {
1783 if (TkTextGetIndex(interp, textPtr, argv[i+2], &stopIndex) != TCL_OK) {
1784 code = TCL_ERROR;
1785 goto done;
1786 }
1787 stopLine = TkBTreeLineIndex(stopIndex.linePtr);
1788 if (!backwards && (stopLine == numLines)) {
1789 stopLine = numLines-1;
1790 }
1791 searchWholeText = 0;
1792 } else {
1793 stopLine = 0;
1794 searchWholeText = 1;
1795 }
1796
1797 /*
1798 * Scan through all of the lines of the text circularly, starting
1799 * at the given index.
1800 */
1801
1802 matchLength = patLength = 0; /* Only needed to prevent compiler
1803 * warnings. */
1804 if (exact) {
1805 patLength = strlen(pattern);
1806 } else {
1807 regexp = Tcl_RegExpCompile(interp, pattern);
1808 if (regexp == NULL) {
1809 code = TCL_ERROR;
1810 goto done;
1811 }
1812 }
1813 lineNum = startingLine;
1814 code = TCL_OK;
1815 for (passes = 0; passes < 2; ) {
1816 if (lineNum >= numLines) {
1817 /*
1818 * Don't search the dummy last line of the text.
1819 */
1820
1821 goto nextLine;
1822 }
1823
1824 /*
1825 * Extract the text from the line. If we're doing regular
1826 * expression matching, drop the newline from the line, so
1827 * that "$" can be used to match the end of the line.
1828 */
1829
1830 linePtr = TkBTreeFindLine(textPtr->tree, lineNum);
1831 curIndex.linePtr = linePtr; curIndex.byteIndex = 0;
1832 for (segPtr = linePtr->segPtr; segPtr != NULL;
1833 curIndex.byteIndex += segPtr->size, segPtr = segPtr->nextPtr) {
1834 if ((segPtr->typePtr != &tkTextCharType)
1835 || (!searchElide && TkTextIsElided(textPtr, &curIndex))) {
1836 continue;
1837 }
1838 Tcl_DStringAppend(&line, segPtr->body.chars, segPtr->size);
1839 }
1840 if (!exact) {
1841 Tcl_DStringSetLength(&line, Tcl_DStringLength(&line)-1);
1842 }
1843 startOfLine = Tcl_DStringValue(&line);
1844
1845 /*
1846 * If we're ignoring case, convert the line to lower case.
1847 */
1848
1849 if (noCase) {
1850 Tcl_DStringSetLength(&line,
1851 Tcl_UtfToLower(Tcl_DStringValue(&line)));
1852 }
1853
1854 /*
1855 * Check for matches within the current line. If so, and if we're
1856 * searching backwards, repeat the search to find the last match
1857 * in the line. (Note: The lastByte should include the NULL char
1858 * so we can handle searching for end of line easier.)
1859 */
1860
1861 matchByte = -1;
1862 firstByte = 0;
1863 lastByte = Tcl_DStringLength(&line) + 1;
1864 if (lineNum == startingLine) {
1865 int indexInDString;
1866
1867 /*
1868 * The starting line is tricky: the first time we see it
1869 * we check one part of the line, and the second pass through
1870 * we check the other part of the line. We have to be very
1871 * careful here because there could be embedded windows or
1872 * other things that are not in the extracted line. Rescan
1873 * the original line to compute the index in it of the first
1874 * character.
1875 */
1876
1877 indexInDString = startingByte;
1878 for (segPtr = linePtr->segPtr, leftToScan = startingByte;
1879 leftToScan > 0; segPtr = segPtr->nextPtr) {
1880 if (segPtr->typePtr != &tkTextCharType) {
1881 indexInDString -= segPtr->size;
1882 }
1883 leftToScan -= segPtr->size;
1884 }
1885
1886 passes++;
1887 if ((passes == 1) ^ backwards) {
1888 /*
1889 * Only use the last part of the line.
1890 */
1891
1892 firstByte = indexInDString;
1893 if ((firstByte >= Tcl_DStringLength(&line))
1894 && !((Tcl_DStringLength(&line) == 0) && !exact)) {
1895 goto nextLine;
1896 }
1897 } else {
1898 /*
1899 * Use only the first part of the line.
1900 */
1901
1902 lastByte = indexInDString;
1903 }
1904 }
1905 do {
1906 int thisLength;
1907 Tcl_UniChar ch;
1908
1909 if (exact) {
1910 p = strstr(startOfLine + firstByte, /* INTL: Native. */
1911 pattern);
1912 if (p == NULL) {
1913 break;
1914 }
1915 i = p - startOfLine;
1916 thisLength = patLength;
1917 } else {
1918 char *start, *end;
1919 int match;
1920
1921 match = Tcl_RegExpExec(interp, regexp,
1922 startOfLine + firstByte, startOfLine);
1923 if (match < 0) {
1924 code = TCL_ERROR;
1925 goto done;
1926 }
1927 if (!match) {
1928 break;
1929 }
1930 Tcl_RegExpRange(regexp, 0, &start, &end);
1931 i = start - startOfLine;
1932 thisLength = end - start;
1933 }
1934 if (i >= lastByte) {
1935 break;
1936 }
1937 matchByte = i;
1938 matchLength = thisLength;
1939 firstByte = i + Tcl_UtfToUniChar(startOfLine + matchByte, &ch);
1940 } while (backwards);
1941
1942 /*
1943 * If we found a match then we're done. Make sure that
1944 * the match occurred before the stopping index, if one was
1945 * specified.
1946 */
1947
1948 if (matchByte >= 0) {
1949 int numChars;
1950
1951 /*
1952 * Convert the byte length to a character count.
1953 */
1954
1955 numChars = Tcl_NumUtfChars(startOfLine + matchByte,
1956 matchLength);
1957
1958 /*
1959 * The index information returned by the regular expression
1960 * parser only considers textual information: it doesn't
1961 * account for embedded windows or any other non-textual info.
1962 * Scan through the line's segments again to adjust both
1963 * matchChar and matchCount.
1964 */
1965
1966 for (segPtr = linePtr->segPtr, leftToScan = matchByte;
1967 leftToScan >= 0; segPtr = segPtr->nextPtr) {
1968 if (segPtr->typePtr != &tkTextCharType) {
1969 matchByte += segPtr->size;
1970 continue;
1971 }
1972 leftToScan -= segPtr->size;
1973 }
1974 for (leftToScan += matchLength; leftToScan > 0;
1975 segPtr = segPtr->nextPtr) {
1976 if (segPtr->typePtr != &tkTextCharType) {
1977 numChars += segPtr->size;
1978 continue;
1979 }
1980 leftToScan -= segPtr->size;
1981 }
1982 TkTextMakeByteIndex(textPtr->tree, lineNum, matchByte, &index);
1983 if (!searchWholeText) {
1984 if (!backwards && (TkTextIndexCmp(&index, &stopIndex) >= 0)) {
1985 goto done;
1986 }
1987 if (backwards && (TkTextIndexCmp(&index, &stopIndex) < 0)) {
1988 goto done;
1989 }
1990 }
1991 if (varName != NULL) {
1992 sprintf(buffer, "%d", numChars);
1993 if (Tcl_SetVar(interp, varName, buffer, TCL_LEAVE_ERR_MSG)
1994 == NULL) {
1995 code = TCL_ERROR;
1996 goto done;
1997 }
1998 }
1999 TkTextPrintIndex(&index, buffer);
2000 Tcl_SetResult(interp, buffer, TCL_VOLATILE);
2001 goto done;
2002 }
2003
2004 /*
2005 * Go to the next (or previous) line;
2006 */
2007
2008 nextLine:
2009 if (backwards) {
2010 lineNum--;
2011 if (!searchWholeText) {
2012 if (lineNum < stopLine) {
2013 break;
2014 }
2015 } else if (lineNum < 0) {
2016 lineNum = numLines-1;
2017 }
2018 } else {
2019 lineNum++;
2020 if (!searchWholeText) {
2021 if (lineNum > stopLine) {
2022 break;
2023 }
2024 } else if (lineNum >= numLines) {
2025 lineNum = 0;
2026 }
2027 }
2028 Tcl_DStringSetLength(&line, 0);
2029 }
2030 done:
2031 Tcl_DStringFree(&line);
2032 if (noCase) {
2033 Tcl_DStringFree(&patDString);
2034 }
2035 return code;
2036 }
2037
2038 /*
2039 *----------------------------------------------------------------------
2040 *
2041 * TkTextGetTabs --
2042 *
2043 * Parses a string description of a set of tab stops.
2044 *
2045 * Results:
2046 * The return value is a pointer to a malloc'ed structure holding
2047 * parsed information about the tab stops. If an error occurred
2048 * then the return value is NULL and an error message is left in
2049 * the interp's result.
2050 *
2051 * Side effects:
2052 * Memory is allocated for the structure that is returned. It is
2053 * up to the caller to free this structure when it is no longer
2054 * needed.
2055 *
2056 *----------------------------------------------------------------------
2057 */
2058
2059 TkTextTabArray *
2060 TkTextGetTabs(interp, tkwin, string)
2061 Tcl_Interp *interp; /* Used for error reporting. */
2062 Tk_Window tkwin; /* Window in which the tabs will be
2063 * used. */
2064 char *string; /* Description of the tab stops. See
2065 * the text manual entry for details. */
2066 {
2067 int argc, i, count, c;
2068 char **argv;
2069 TkTextTabArray *tabArrayPtr;
2070 TkTextTab *tabPtr;
2071 Tcl_UniChar ch;
2072
2073 if (Tcl_SplitList(interp, string, &argc, &argv) != TCL_OK) {
2074 return NULL;
2075 }
2076
2077 /*
2078 * First find out how many entries we need to allocate in the
2079 * tab array.
2080 */
2081
2082 count = 0;
2083 for (i = 0; i < argc; i++) {
2084 c = argv[i][0];
2085 if ((c != 'l') && (c != 'r') && (c != 'c') && (c != 'n')) {
2086 count++;
2087 }
2088 }
2089
2090 /*
2091 * Parse the elements of the list one at a time to fill in the
2092 * array.
2093 */
2094
2095 tabArrayPtr = (TkTextTabArray *) ckalloc((unsigned)
2096 (sizeof(TkTextTabArray) + (count-1)*sizeof(TkTextTab)));
2097 tabArrayPtr->numTabs = 0;
2098 for (i = 0, tabPtr = &tabArrayPtr->tabs[0]; i < argc; i++, tabPtr++) {
2099 if (Tk_GetPixels(interp, tkwin, argv[i], &tabPtr->location)
2100 != TCL_OK) {
2101 goto error;
2102 }
2103 tabArrayPtr->numTabs++;
2104
2105 /*
2106 * See if there is an explicit alignment in the next list
2107 * element. Otherwise just use "left".
2108 */
2109
2110 tabPtr->alignment = LEFT;
2111 if ((i+1) == argc) {
2112 continue;
2113 }
2114 Tcl_UtfToUniChar(argv[i+1], &ch);
2115 if (!Tcl_UniCharIsAlpha(ch)) {
2116 continue;
2117 }
2118 i += 1;
2119 c = argv[i][0];
2120 if ((c == 'l') && (strncmp(argv[i], "left",
2121 strlen(argv[i])) == 0)) {
2122 tabPtr->alignment = LEFT;
2123 } else if ((c == 'r') && (strncmp(argv[i], "right",
2124 strlen(argv[i])) == 0)) {
2125 tabPtr->alignment = RIGHT;
2126 } else if ((c == 'c') && (strncmp(argv[i], "center",
2127 strlen(argv[i])) == 0)) {
2128 tabPtr->alignment = CENTER;
2129 } else if ((c == 'n') && (strncmp(argv[i],
2130 "numeric", strlen(argv[i])) == 0)) {
2131 tabPtr->alignment = NUMERIC;
2132 } else {
2133 Tcl_AppendResult(interp, "bad tab alignment \"",
2134 argv[i], "\": must be left, right, center, or numeric",
2135 (char *) NULL);
2136 goto error;
2137 }
2138 }
2139 ckfree((char *) argv);
2140 return tabArrayPtr;
2141
2142 error:
2143 ckfree((char *) tabArrayPtr);
2144 ckfree((char *) argv);
2145 return NULL;
2146 }
2147
2148 /*
2149 *----------------------------------------------------------------------
2150 *
2151 * TextDumpCmd --
2152 *
2153 * Return information about the text, tags, marks, and embedded windows
2154 * and images in a text widget. See the man page for the description
2155 * of the text dump operation for all the details.
2156 *
2157 * Results:
2158 * A standard Tcl result.
2159 *
2160 * Side effects:
2161 * Memory is allocated for the result, if needed (standard Tcl result
2162 * side effects).
2163 *
2164 *----------------------------------------------------------------------
2165 */
2166
2167 static int
2168 TextDumpCmd(textPtr, interp, argc, argv)
2169 register TkText *textPtr; /* Information about text widget. */
2170 Tcl_Interp *interp; /* Current interpreter. */
2171 int argc; /* Number of arguments. */
2172 char **argv; /* Argument strings. Someone else has already
2173 * parsed this command enough to know that
2174 * argv[1] is "dump". */
2175 {
2176 TkTextIndex index1, index2;
2177 int arg;
2178 int lineno; /* Current line number */
2179 int what = 0; /* bitfield to select segment types */
2180 int atEnd; /* True if dumping up to logical end */
2181 TkTextLine *linePtr;
2182 char *command = NULL; /* Script callback to apply to segments */
2183 #define TK_DUMP_TEXT 0x1
2184 #define TK_DUMP_MARK 0x2
2185 #define TK_DUMP_TAG 0x4
2186 #define TK_DUMP_WIN 0x8
2187 #define TK_DUMP_IMG 0x10
2188 #define TK_DUMP_ALL (TK_DUMP_TEXT|TK_DUMP_MARK|TK_DUMP_TAG| \
2189 TK_DUMP_WIN|TK_DUMP_IMG)
2190
2191 for (arg=2 ; argv[arg] != (char *) NULL ; arg++) {
2192 size_t len;
2193 if (argv[arg][0] != '-') {
2194 break;
2195 }
2196 len = strlen(argv[arg]);
2197 if (strncmp("-all", argv[arg], len) == 0) {
2198 what = TK_DUMP_ALL;
2199 } else if (strncmp("-text", argv[arg], len) == 0) {
2200 what |= TK_DUMP_TEXT;
2201 } else if (strncmp("-tag", argv[arg], len) == 0) {
2202 what |= TK_DUMP_TAG;
2203 } else if (strncmp("-mark", argv[arg], len) == 0) {
2204 what |= TK_DUMP_MARK;
2205 } else if (strncmp("-image", argv[arg], len) == 0) {
2206 what |= TK_DUMP_IMG;
2207 } else if (strncmp("-window", argv[arg], len) == 0) {
2208 what |= TK_DUMP_WIN;
2209 } else if (strncmp("-command", argv[arg], len) == 0) {
2210 arg++;
2211 if (arg >= argc) {
2212 Tcl_AppendResult(interp, "Usage: ", argv[0], " dump ?-all -image -text -mark -tag -window? ?-command script? index ?index2?", NULL);
2213 return TCL_ERROR;
2214 }
2215 command = argv[arg];
2216 } else {
2217 Tcl_AppendResult(interp, "Usage: ", argv[0], " dump ?-all -image -text -mark -tag -window? ?-command script? index ?index2?", NULL);
2218 return TCL_ERROR;
2219 }
2220 }
2221 if (arg >= argc) {
2222 Tcl_AppendResult(interp, "Usage: ", argv[0], " dump ?-all -image -text -mark -tag -window? ?-command script? index ?index2?", NULL);
2223 return TCL_ERROR;
2224 }
2225 if (what == 0) {
2226 what = TK_DUMP_ALL;
2227 }
2228 if (TkTextGetIndex(interp, textPtr, argv[arg], &index1) != TCL_OK) {
2229 return TCL_ERROR;
2230 }
2231 lineno = TkBTreeLineIndex(index1.linePtr);
2232 arg++;
2233 atEnd = 0;
2234 if (argc == arg) {
2235 TkTextIndexForwChars(&index1, 1, &index2);
2236 } else {
2237 if (TkTextGetIndex(interp, textPtr, argv[arg], &index2) != TCL_OK) {
2238 return TCL_ERROR;
2239 }
2240 if (strncmp(argv[arg], "end", strlen(argv[arg])) == 0) {
2241 atEnd = 1;
2242 }
2243 }
2244 if (TkTextIndexCmp(&index1, &index2) >= 0) {
2245 return TCL_OK;
2246 }
2247 if (index1.linePtr == index2.linePtr) {
2248 DumpLine(interp, textPtr, what, index1.linePtr,
2249 index1.byteIndex, index2.byteIndex, lineno, command);
2250 } else {
2251 DumpLine(interp, textPtr, what, index1.linePtr,
2252 index1.byteIndex, 32000000, lineno, command);
2253 linePtr = index1.linePtr;
2254 while ((linePtr = TkBTreeNextLine(linePtr)) != (TkTextLine *)NULL) {
2255 lineno++;
2256 if (linePtr == index2.linePtr) {
2257 break;
2258 }
2259 DumpLine(interp, textPtr, what, linePtr, 0, 32000000,
2260 lineno, command);
2261 }
2262 DumpLine(interp, textPtr, what, index2.linePtr, 0,
2263 index2.byteIndex, lineno, command);
2264 }
2265 /*
2266 * Special case to get the leftovers hiding at the end mark.
2267 */
2268 if (atEnd) {
2269 DumpLine(interp, textPtr, what & ~TK_DUMP_TEXT, index2.linePtr,
2270 0, 1, lineno, command);
2271
2272 }
2273 return TCL_OK;
2274 }
2275
2276 /*
2277 * DumpLine
2278 * Return information about a given text line from character
2279 * position "start" up to, but not including, "end".
2280 *
2281 * Results:
2282 * A standard Tcl result.
2283 *
2284 * Side effects:
2285 * None, but see DumpSegment.
2286 */
2287 static void
2288 DumpLine(interp, textPtr, what, linePtr, startByte, endByte, lineno, command)
2289 Tcl_Interp *interp;
2290 TkText *textPtr;
2291 int what; /* bit flags to select segment types */
2292 TkTextLine *linePtr; /* The current line */
2293 int startByte, endByte; /* Byte range to dump */
2294 int lineno; /* Line number for indices dump */
2295 char *command; /* Script to apply to the segment */
2296 {
2297 int offset;
2298 TkTextSegment *segPtr;
2299 TkTextIndex index;
2300 /*
2301 * Must loop through line looking at its segments.
2302 * character
2303 * toggleOn, toggleOff
2304 * mark
2305 * image
2306 * window
2307 */
2308
2309 for (offset = 0, segPtr = linePtr->segPtr ;
2310 (offset < endByte) && (segPtr != (TkTextSegment *)NULL) ;
2311 offset += segPtr->size, segPtr = segPtr->nextPtr) {
2312 if ((what & TK_DUMP_TEXT) && (segPtr->typePtr == &tkTextCharType) &&
2313 (offset + segPtr->size > startByte)) {
2314 char savedChar; /* Last char used in the seg */
2315 int last = segPtr->size; /* Index of savedChar */
2316 int first = 0; /* Index of first char in seg */
2317 if (offset + segPtr->size > endByte) {
2318 last = endByte - offset;
2319 }
2320 if (startByte > offset) {
2321 first = startByte - offset;
2322 }
2323 savedChar = segPtr->body.chars[last];
2324 segPtr->body.chars[last] = '\0';
2325
2326 TkTextMakeByteIndex(textPtr->tree, lineno, offset + first, &index);
2327 DumpSegment(interp, "text", segPtr->body.chars + first,
2328 command, &index, what);
2329 segPtr->body.chars[last] = savedChar;
2330 } else if ((offset >= startByte)) {
2331 if ((what & TK_DUMP_MARK) && (segPtr->typePtr->name[0] == 'm')) {
2332 TkTextMark *markPtr = (TkTextMark *)&segPtr->body;
2333 char *name = Tcl_GetHashKey(&textPtr->markTable, markPtr->hPtr);
2334
2335 TkTextMakeByteIndex(textPtr->tree, lineno, offset, &index);
2336 DumpSegment(interp, "mark", name, command, &index, what);
2337 } else if ((what & TK_DUMP_TAG) &&
2338 (segPtr->typePtr == &tkTextToggleOnType)) {
2339 TkTextMakeByteIndex(textPtr->tree, lineno, offset, &index);
2340 DumpSegment(interp, "tagon",
2341 segPtr->body.toggle.tagPtr->name,
2342 command, &index, what);
2343 } else if ((what & TK_DUMP_TAG) &&
2344 (segPtr->typePtr == &tkTextToggleOffType)) {
2345 TkTextMakeByteIndex(textPtr->tree, lineno, offset, &index);
2346 DumpSegment(interp, "tagoff",
2347 segPtr->body.toggle.tagPtr->name,
2348 command, &index, what);
2349 } else if ((what & TK_DUMP_IMG) &&
2350 (segPtr->typePtr->name[0] == 'i')) {
2351 TkTextEmbImage *eiPtr = (TkTextEmbImage *)&segPtr->body;
2352 char *name = (eiPtr->name == NULL) ? "" : eiPtr->name;
2353 TkTextMakeByteIndex(textPtr->tree, lineno, offset, &index);
2354 DumpSegment(interp, "image", name,
2355 command, &index, what);
2356 } else if ((what & TK_DUMP_WIN) &&
2357 (segPtr->typePtr->name[0] == 'w')) {
2358 TkTextEmbWindow *ewPtr = (TkTextEmbWindow *)&segPtr->body;
2359 char *pathname;
2360 if (ewPtr->tkwin == (Tk_Window) NULL) {
2361 pathname = "";
2362 } else {
2363 pathname = Tk_PathName(ewPtr->tkwin);
2364 }
2365 TkTextMakeByteIndex(textPtr->tree, lineno, offset, &index);
2366 DumpSegment(interp, "window", pathname,
2367 command, &index, what);
2368 }
2369 }
2370 }
2371 }
2372
2373 /*
2374 * DumpSegment
2375 * Either append information about the current segment to the result,
2376 * or make a script callback with that information as arguments.
2377 *
2378 * Results:
2379 * None
2380 *
2381 * Side effects:
2382 * Either evals the callback or appends elements to the result string.
2383 */
2384 static int
2385 DumpSegment(interp, key, value, command, index, what)
2386 Tcl_Interp *interp;
2387 char *key; /* Segment type key */
2388 char *value; /* Segment value */
2389 char *command; /* Script callback */
2390 TkTextIndex *index; /* index with line/byte position info */
2391 int what; /* Look for TK_DUMP_INDEX bit */
2392 {
2393 char buffer[TCL_INTEGER_SPACE*2];
2394 TkTextPrintIndex(index, buffer);
2395 if (command == (char *) NULL) {
2396 Tcl_AppendElement(interp, key);
2397 Tcl_AppendElement(interp, value);
2398 Tcl_AppendElement(interp, buffer);
2399 return TCL_OK;
2400 } else {
2401 char *argv[4];
2402 char *list;
2403 int result;
2404 argv[0] = key;
2405 argv[1] = value;
2406 argv[2] = buffer;
2407 argv[3] = (char *) NULL;
2408 list = Tcl_Merge(3, argv);
2409 result = Tcl_VarEval(interp, command, " ", list, (char *) NULL);
2410 ckfree(list);
2411 return result;
2412 }
2413 }
2414
2415 /* End of tktext.c */

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