source: branches/branch-1-0/include/helpers/textview.h@ 473

Last change on this file since 473 was 375, checked in by pr, 17 years ago

Allow copy to clipboard from textview control. Bug 1116.
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1
2/*
3 *@@sourcefile textview.h:
4 * header file for textview.c. See remarks there.
5 *
6 * Note: Version numbering in this file relates to XWorkplace version
7 * numbering.
8 */
9
10/* Copyright (C) 2000-2008 Ulrich M”ller.
11 * This file is part of the "XWorkplace helpers" source package.
12 * This is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published
14 * by the Free Software Foundation, in version 2 as it comes in the
15 * "COPYING" file of the XWorkplace main distribution.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 *@@include #define INCL_SPL // for printing functions
22 *@@include #include <os2.h>
23 *@@include #include "helpers\linklist.h" // for device-independent functions
24 *@@include #include "helpers\xstring.h" // for device-independent functions
25 *@@include #include "helpers\textview.h"
26 */
27
28#if __cplusplus
29extern "C" {
30#endif
31
32#ifndef TEXTVIEW_HEADER_INCLUDED
33 #define TEXTVIEW_HEADER_INCLUDED
34
35 /* ******************************************************************
36 *
37 * Escape sequences
38 *
39 ********************************************************************/
40
41 /*
42 *@@ TXVESC_CHAR:
43 * general escape character which introduces
44 * all escape sequences.
45 */
46
47 #define TXVESC_CHAR '\xFF'
48 #define TXVESC_STRING "\xFF"
49
50 // fixed formatting tags: PRE, B, I U, STRIKE
51 // (no parameters)
52 /* #define TXVESC_PRE_BEGIN TXVESC_STRING "\x01\x01"
53 #define TXVESC_PRE_END TXVESC_STRING "\x01\x02" */
54
55 #define TXVESC_SET_FONT TXVESC_STRING "\x01"
56 // here follow three characters with the
57 // font index:
58 // e.g. "000" == default font
59 // "001" == monospaced font
60 // Fonts 0 and 1 always exist in the XTextView control.
61 // Other fonts are presently not supported.
62 // --> total size: 5
63
64 #define TXVESC_BOLD_BEGIN TXVESC_STRING "\x02\x01"
65 #define TXVESC_BOLD_END TXVESC_STRING "\x02\x02"
66
67 #define TXVESC_ITALICS_BEGIN TXVESC_STRING "\x03\x01"
68 #define TXVESC_ITALICS_END TXVESC_STRING "\x03\x02"
69
70 #define TXVESC_UNDERLINE_BEGIN TXVESC_STRING "\x04\x01"
71 #define TXVESC_UNDERLINE_END TXVESC_STRING "\x04\x02"
72
73 #define TXVESC_STRIKE_BEGIN TXVESC_STRING "\x05\x01"
74 #define TXVESC_STRIKE_END TXVESC_STRING "\x05\x02"
75
76 // links
77 #define TXVESC_LINK_BEGIN TXVESC_STRING "\x06"
78 // here follows the link reference, which
79 // is variable in length and must be terminated
80 // with another 0xFF escape code (NOT null byte);
81 // --> total size: 2 plus link name length
82 // plus 1 for 0xFF terminator
83
84 #define TXVESC_LINK_END TXVESC_STRING "\x07"
85 // end of the link
86 // --> total size: 2
87
88 #define TXVESC_ANCHORNAME TXVESC_STRING "\x08"
89 // here follows the anchor name, which is
90 // variable in length and must be terminated
91 // with another 0xFF escape code (NOT null byte);
92 // --> total size: 2 plus anchor name length
93 // plus 1 for 0xFF terminator
94
95 // character formatting with parameters:
96 #define TXVESC_POINTSIZE_REL TXVESC_STRING "\x10"
97 // here follow three characters with a percentage
98 // of the default point size
99 // e.g. "050" == half the size
100 // "200" == double the size
101 // --> total size: 5
102
103 /*
104 * paragraph formatting
105 * -- left and right margins:
106 */
107
108 #define TXVESC_LEFTMARGIN TXVESC_STRING "\x20"
109 // here follow four characters to specify the
110 // new first line left margin (XFMTPARAGRAPH.lLeftMargin),
111 // which is based on the average char width of
112 // the current font:
113 // e.g. "0020" == set margin to 20 average char widths
114 // --> total size: 6
115
116 #define TXVESC_FIRSTLINEMARGIN_LEFT TXVESC_STRING "\x21-"
117 #define TXVESC_FIRSTLINEMARGIN_RIGHT TXVESC_STRING "\x21+"
118 // here follow three characters to specify the
119 // new absolute left margin (XFMTPARAGRAPH.lFirstLineMargin)
120 // which is based on the average char width of
121 // the current font:
122 // e.g. "+020" == set first line margin to 20 average char widths
123 // e.g. "-020" == set first line margin to 20 average char widths
124 // --> total size: 6
125
126 #define TXVESC_TAB TXVESC_STRING "\x22"
127 // the tab can be used to move from the first line margin
128 // to the left margin, if the first line margin is negative;
129 // used with list items (UL LI and such)
130 // --> total size: 2
131
132 #define TXVESC_MARKER TXVESC_STRING "\x23"
133 // draw marker at the current position: the next byte
134 // determines the type of marker:
135 // -- 1: disc (filled circle)
136 // -- 2: square (filled box)
137 // -- 3: circle (hollow circle)
138 // --> total size: 3
139
140 /*
141 * paragraph formatting
142 * -- paragraph spacing:
143 */
144
145 #define TXVESC_SPACEBEFORE TXVESC_STRING "\x30"
146 #define TXVESC_SPACEAFTER TXVESC_STRING "\x31"
147 // here follow four characters to specify the
148 // new spacing before or after a paragraph:
149 // e.g. "0020" == twenty
150 // !! special case: "####" means reset to default
151 // --> total size: 6
152
153 #define TXVESC_WORDWRAP TXVESC_STRING "\x32"
154 // here follows a single character being "0" or "1"
155 // --> total size: 3
156
157 /* ******************************************************************
158 *
159 * Device-independent functions
160 *
161 ********************************************************************/
162
163 #define TXVWORDF_GLUEWITHNEXT 1 // escape
164 #define TXVWORDF_LINEBREAK 2 // \n
165 #define TXVWORDF_LINEFEED 4 // \r
166
167 typedef struct _TXVRECTANGLE *PTXVRECTANGLE;
168
169 /*
170 *@@ TXVWORD:
171 * this defines a "word" to be drawn. A word is
172 * normally a sequence of characters between
173 * space, \n, or \r characters, unless escape
174 * sequences come up. See txvFormatText.
175 *
176 *@@added V0.9.3 (2000-05-14) [umoeller]
177 */
178
179 typedef struct _TXVWORD
180 {
181 const char *pStart; // ptr into TEXTVIEWWINDATA.pszViewText
182 ULONG cChars; // characters in line to draw, starting
183 // at pStartOfLine;
184 // this might be less than the next \n
185 // char if word-wrapping has been enabled
186 // or an escape character was found
187
188 CHAR cEscapeCode;
189 // if 0, this word represents a substring to be painted
190 // ("normal word").
191 // If != 0; this "word" holds an escape sequence in *pStart
192 // which must be considered for paragraph formatting, but
193 // NOT be painted, except if fPaintEscapeWord is TRUE also.
194 // cEscapeCode then holds a copy of the escape character
195 // (which is pStart + 1).
196 BOOL fPaintEscapeWord;
197 // if this is TRUE, this escape is some special graphics
198 // to be painted also (e.g. list markers). txvPaint then
199 // evaluates the escape code (in pStart) to see what needs
200 // to be done.
201
202 // all the following are only set if (fIsEscapeSequence == FALSE):
203
204 ULONG ulFlags;
205 // one of the following:
206 // -- TXVWORDF_GLUEWITHNEXT: this "word" was cut because
207 // an escape sequence was found; this word must
208 // therefore be in the same line with the next word
209 // -- TXVWORDF_LINEBREAK: this word ends with a \n char;
210 // start new paragraph after this
211 // -- TXVWORDF_LINEFEED: this words ends with a \r char;
212 // start new line after this
213
214 ULONG ulCXWithSpaces, // width of word (in pels), including trailing spaces
215 ulCXWord, // width of word (in pels), without trailing spaces
216 ulCY; // height of word (in pels)
217
218 LONG lX; // X position to paint this word at;
219 // this is (re)set during word-to-rectangle correlation!
220 PTXVRECTANGLE pRectangle; // reverse pointer to the TXVRECTANGLE structure to
221 // which this word belongs; useful for repainting;
222 // this is (re)set during word-to-rectangle correlation!
223 ULONG ulBaseLineOfs; // base line offset; add this to rcl.yBottom
224 // to get the the start point to be used for
225 // GpiCharStringPosAt
226
227 LONG lcid; // logical font ID to use for this rectangle
228 LONG lPointSize; // point size to use for this rectangle;
229 // this is set to 0 for bitmap fonts
230 ULONG flChar; // flOptions parameter for GpiCharStringPosAt;
231 // this will only have the CHS_UNDERSCORE or
232 // CHS_STRIKEOUT flags set
233
234 PCSZ pcszLinkTarget; // if != NULL, pointer to a string in XFORMATDATA.llLinks;
235 // the word is then part of a link
236 // V0.9.20 (2002-08-10) [umoeller]
237
238 } TXVWORD, *PTXVWORD;
239
240 #ifdef LINKLIST_HEADER_INCLUDED
241 /*
242 *@@ TXVRECTANGLE:
243 * this defines one line to be drawn.
244 * This is device-independent.
245 * See txvFormatText.
246 */
247
248 typedef struct _TXVRECTANGLE
249 {
250 RECTL rcl; // rectangle of this line, into which
251 // the words in llWords should be painted;
252 // the bottom of this rectangle specifies the
253 // bottommost point used (neccessary for
254 // characters with underlengths, such as
255 // "g" or "y"); ulMaxBaseLineOfs must be
256 // added to the starting point
257 // when using GpiCharStringPosAt
258 ULONG ulMaxBaseLineOfs; // highest ulBaseLineOfs of all words
259 // belonging to this rectangle.
260 LINKLIST llWords; // list of TXVWORD's which belong to this
261 // rectangle. Note that these are duplicate
262 // pointers to be able to correlate rectangles
263 // to words; there is a second list of TXVWORD's
264 // in XFORMATDATA which holds really all the
265 // words which were created (for cleanup).
266 // So one allocated TXVWORD structure can
267 // have two pointers pointing to it.
268 } TXVRECTANGLE;
269 #endif
270
271 /*
272 *@@ XFMTFONT:
273 * specifies a font to be used in
274 * XFMTCHARACTER.
275 *
276 *@@added V0.9.3 (2000-05-06) [umoeller]
277 */
278
279 typedef struct _XFMTFONT
280 {
281 LONG lcid;
282 // default font to use for this paragraph
283 FONTMETRICS FontMetrics;
284 LONG alCX[256]; // width of each ASCII character for this
285 // string; computed by txvSetFormatFont
286 } XFMTFONT, *PXFMTFONT;
287
288 /*
289 *@@ XFMTCHARACTER:
290 * character formatting parameters.
291 * This is used by the formatting engine
292 * (txvFormat)
293 * to describe character formatting.
294 * Character formatting can only be
295 * changed between words (TXVWORD).
296 *
297 *@@added V0.9.3 (2000-05-06) [umoeller]
298 */
299
300 typedef struct _XFMTCHARACTER
301 {
302 LONG lPointSize;
303 // default font size to use for this paragraph
304 XFMTFONT fntRegular,
305 fntBold,
306 fntItalics,
307 fntBoldItalics;
308 } XFMTCHARACTER, *PXFMTCHARACTER;
309
310 /*
311 *@@ XFMTPARAGRAPH:
312 * paragraph formatting parameters.
313 * This is used by the formatting engine
314 * (txvFormat)
315 * for every paragraph which is started.
316 *
317 *@@added V0.9.3 (2000-05-06) [umoeller]
318 */
319
320 typedef struct _XFMTPARAGRAPH
321 {
322 BOOL fWordWrap;
323 LONG lLeftMargin,
324 // left indentation for all lines
325 // (in pixels)
326 lRightMargin,
327 // right indentation for all lines
328 // (in pixels)
329 lFirstLineMargin;
330 // additional indentation for first line only;
331 // this is added to lLeftMargin (can be negative)
332 // (in pixels)
333 LONG lSpaceBefore,
334 // space before each paragraph
335 // (in pixels)
336 lSpaceAfter;
337 // space after each paragraph
338 // (in pixels)
339 } XFMTPARAGRAPH, *PXFMTPARAGRAPH;
340
341 #ifdef LINKLIST_HEADER_INCLUDED
342 #ifdef XSTRING_HEADER_INCLUDED
343
344 /*
345 *@@ XFORMATDATA:
346 * text formatting data. Passed to
347 * txvPaintText, stored in TEXTVIEWWINDATA.
348 * This is device-independent.
349 */
350
351 typedef struct _XFORMATDATA
352 {
353 XSTRING strOrigText; // original text from WinSetWindowText
354
355 // input to txvFormatText
356 XSTRING strViewText; // view text after conversion
357
358 XFMTPARAGRAPH
359 fmtpStandard; // standard paragraph format
360
361 XFMTCHARACTER
362 fmtcStandard, // format for standard text
363 fmtcCode; // format for code text (monospaced; PRE, CODE etc.)
364
365 // output from txvFormatText
366 LINKLIST llRectangles;
367 // list of TXVRECTANGLE, from top to bottom;
368 // text pointers point into pszViewText
369 LINKLIST llWords;
370 // list of TXVWORD's, in order of creation;
371 // this is just for proper cleanup. The items
372 // in the TXVRECTANGLE.llWords list also point
373 // to the words stored in this list.
374
375 SIZEL szlWorkspace; // width and height of viewport (total text space)
376
377 LINKLIST llLinks;
378 // list of malloc'd PSZ's (auto-free) with all
379 // the links encountered while parsing the text.
380 // These are needed for passing the correct link
381 // target names when the user clicks on one.
382 // V0.9.20 (2002-08-10) [umoeller]
383
384 } XFORMATDATA, *PXFORMATDATA;
385
386 VOID txvInitFormat(PXFORMATDATA pxfd);
387
388 VOID txvFormatText(HPS hps,
389 PXFORMATDATA pxfd,
390 PRECTL prclView,
391 BOOL fFullRecalc);
392 #endif
393 #endif
394
395 VOID txvStripLinefeeds(char **ppszText,
396 ULONG ulTabSize);
397
398 /* ******************************************************************
399 *
400 * Window-dependent functions
401 *
402 ********************************************************************/
403
404 /*
405 * XTextView messages:
406 *
407 */
408
409// #define TXM_QUERYCHARFORMAT (WM_USER + 1022)
410// #define TXM_SETCHARFORMAT (WM_USER + 1023)
411 #define TXM_QUERYPARFORMAT (WM_USER + 1022)
412 #define TXM_SETPARFORMAT (WM_USER + 1023)
413 #define TXM_SETWORDWRAP (WM_USER + 1024)
414 #define TXM_QUERYCDATA (WM_USER + 1025)
415 #define TXM_SETCDATA (WM_USER + 1026)
416 #define TXM_JUMPTOANCHORNAME (WM_USER + 1027)
417 #define TXM_QUERYTEXTEXTENT (WM_USER + 1028)
418 #define TXM_QUERYSTYLE (WM_USER + 1029)
419 #define TXM_SETSTYLE (WM_USER + 1030)
420 #define TXM_COPY (WM_USER + 1031)
421
422 #define WC_XTEXTVIEW "XTextViewClass"
423
424 /*
425 * XTextView nofication codes:
426 *
427 */
428
429 /*
430 *@@ TXVN_LINK:
431 * WM_CONTROL notification code posted (!)
432 * to the XTextView control's owner.
433 *
434 * Parameters:
435 *
436 * -- USHORT SHORT1FROMMP(mp1): id of the control.
437 *
438 * -- USHORT SHORT2FROMMP(mp1): nofify code (TXVN_LINK).
439 *
440 * -- const char *mp2: target of the link that the
441 * user clicked on.
442 *
443 *@@added V0.9.3 (2000-05-18) [umoeller]
444 */
445
446 #define TXVN_LINK 1
447
448 /*
449 * XTextView window style flags:
450 * all renamed, all turned into window style flags
451 */
452
453 #define XS_VSCROLL 0x0001 // show vertical scroll bar
454 #define XS_HSCROLL 0x0002 // show horizontal scroll bar
455 #define XS_AUTOVHIDE 0x0004 // with XTXF_VSCROLL: automatically hide scrollbar
456 #define XS_AUTOHHIDE 0x0008 // with XTXF_HSCROLL: automatically hide scrollbar
457
458 // handy macro V0.9.20 (2002-08-10) [umoeller]
459 #define XS_FULLSCROLL (XS_VSCROLL | XS_HSCROLL | XS_AUTOVHIDE | XS_AUTOHHIDE)
460
461 #define XS_WORDWRAP 0x0010
462 // enable word-wrapping in the default paragraph
463 // format from the start
464
465 #define XS_STATIC 0x0020
466 // behave like static control: no focus, be skipped
467 // over with tabbing in dialogs
468 // V0.9.20 (2002-08-10) [umoeller]
469
470 #define XS_FORMAT_MASK 0x0700
471 #define XS_PREFORMATTED 0x0000 // plain text with \n only plus \xFF escape codes
472 // (no conversion performed)
473 #define XS_PLAINTEXT 0x0100 // plain text with \r and \xFF chars that need conversion
474 #define XS_HTML 0x0200 // HTML
475
476 /*
477 *@@ XTEXTVIEWCDATA:
478 * control data structure for text view
479 * control. This can be passed to
480 * WinCreateWindow with the pCtlData
481 * parameter. You then MUST set the
482 * "cbData" field to sizeof(XTEXTVIEWCDATA).
483 */
484
485 typedef struct _XTEXTVIEWCDATA
486 {
487 USHORT cbData;
488 ULONG ulXBorder,
489 // space to leave on the left and right of text view;
490 // defaults to 0
491 ulYBorder;
492 // space to leave on the top and bottom of text view;
493 // defaults to 0
494 ULONG ulVScrollLineUnit,
495 // pixels to scroll if scroll bar "up" or "down" button
496 // is pressed; defaults to 15
497 ulHScrollLineUnit;
498 // pixels to scroll if scroll bar "left" or "right" button
499 // is pressed; defaults to 15
500 } XTEXTVIEWCDATA, *PXTEXTVIEWCDATA;
501
502
503 BOOL txvRegisterTextView(HAB hab);
504
505 HWND txvReplaceWithTextView(HWND hwndParentAndOwner,
506 USHORT usID,
507 ULONG flWinStyle,
508 USHORT usBorder);
509
510 /* ******************************************************************
511 *
512 * Printer-dependent functions
513 *
514 ********************************************************************/
515
516 typedef BOOL APIENTRY FNPRINTCALLBACK(ULONG ulPage,
517 ULONG ulUser);
518
519 #ifdef INCL_SPL
520 BOOL txvPrint(HAB hab,
521 HDC hdc,
522 HPS hps,
523 PSZ pszViewText,
524 ULONG ulSize,
525 PSZ pszFaceName,
526 HCINFO *phci,
527 PSZ pszDocTitle,
528 FNPRINTCALLBACK *pfnCallback);
529 #endif
530
531 int txvPrintWindow(HWND hwndTextView,
532 PSZ pszDocTitle,
533 FNPRINTCALLBACK *pfnCallback);
534
535#endif
536
537#if __cplusplus
538}
539#endif
540
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