source: trunk/include/helpers/textview.h@ 85

Last change on this file since 85 was 85, checked in by umoeller, 24 years ago

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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 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 "linklist.h" // for device-independent functions
24 *@@include #include "xstring.h" // for device-independent functions
25 *@@include #include "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 TXVESC_STRING "\x06"
78 // here follow four characters with the
79 // link index in hex (0001-FFFF);
80 // "####" means end of link
81 // --> total size: 6
82
83 #define TXVESC_ANCHORNAME TXVESC_STRING "\x07"
84 // here follows the anchor name, which is
85 // variable in length and must be terminated
86 // with another 0xFF escape code (NOT null byte);
87 // --> total size: 2 plus anchor name length
88 // plus 1 for 0xFF terminator
89
90 // character formatting with parameters:
91 #define TXVESC_POINTSIZE_REL TXVESC_STRING "\x10"
92 // here follow three characters with a percentage
93 // of the default point size
94 // e.g. "050" == half the size
95 // "200" == double the size
96 // --> total size: 5
97
98 /*
99 * paragraph formatting
100 * -- left and right margins:
101 */
102
103 #define TXVESC_LEFTMARGIN TXVESC_STRING "\x20"
104 // here follow four characters to specify the
105 // new first line left margin (XFMTPARAGRAPH.lLeftMargin),
106 // which is based on the average char width of
107 // the current font:
108 // e.g. "0020" == set margin to 20 average char widths
109 // --> total size: 6
110
111 #define TXVESC_FIRSTLINEMARGIN_LEFT TXVESC_STRING "\x21-"
112 #define TXVESC_FIRSTLINEMARGIN_RIGHT TXVESC_STRING "\x21+"
113 // here follow three characters to specify the
114 // new absolute left margin (XFMTPARAGRAPH.lFirstLineMargin)
115 // which is based on the average char width of
116 // the current font:
117 // e.g. "+020" == set first line margin to 20 average char widths
118 // e.g. "-020" == set first line margin to 20 average char widths
119 // --> total size: 6
120
121 #define TXVESC_TAB TXVESC_STRING "\x22"
122 // the tab can be used to move from the first line margin
123 // to the left margin, if the first line margin is negative;
124 // used with list items (UL LI and such)
125 // --> total size: 2
126
127 #define TXVESC_MARKER TXVESC_STRING "\x23"
128 // draw marker at the current position: the next byte
129 // determines the type of marker:
130 // -- 1: disc (filled circle)
131 // -- 2: square (filled box)
132 // -- 3: circle (hollow circle)
133 // --> total size: 3
134
135 /*
136 * paragraph formatting
137 * -- paragraph spacing:
138 */
139
140 #define TXVESC_SPACEBEFORE TXVESC_STRING "\x30"
141 #define TXVESC_SPACEAFTER TXVESC_STRING "\x31"
142 // here follow four characters to specify the
143 // new spacing before or after a paragraph:
144 // e.g. "0020" == twenty
145 // !! special case: "####" means reset to default
146 // --> total size: 6
147
148 #define TXVESC_WORDWRAP TXVESC_STRING "\x32"
149 // here follows a single character being "0" or "1"
150 // --> total size: 3
151
152 /* ******************************************************************
153 *
154 * Device-independent functions
155 *
156 ********************************************************************/
157
158 #define TXVWORDF_GLUEWITHNEXT 1 // escape
159 #define TXVWORDF_LINEBREAK 2 // \n
160 #define TXVWORDF_LINEFEED 4 // \r
161
162 typedef struct _TXVRECTANGLE *PTXVRECTANGLE;
163
164 /*
165 *@@ TXVWORD:
166 * this defines a "word" to be drawn. A word is
167 * normally a sequence of characters between
168 * space, \n, or \r characters, unless escape
169 * sequences come up. See txvFormatText.
170 *
171 *@@added V0.9.3 (2000-05-14) [umoeller]
172 */
173
174 typedef struct _TXVWORD
175 {
176 const char *pStart; // ptr into TEXTVIEWWINDATA.pszViewText
177 ULONG cChars; // characters in line to draw, starting
178 // at pStartOfLine;
179 // this might be less than the next \n
180 // char if word-wrapping has been enabled
181 // or an escape character was found
182
183 CHAR cEscapeCode;
184 // if 0, this word represents a substring to be painted
185 // ("normal word").
186 // If != 0; this "word" holds an escape sequence in *pStart
187 // which must be considered for paragraph formatting, but
188 // NOT be painted, except if fPaintEscapeWord is TRUE also.
189 // cEscapeCode then holds a copy of the escape character
190 // (which is pStart + 1).
191 BOOL fPaintEscapeWord;
192 // if this is TRUE, this escape is some special graphics
193 // to be painted also (e.g. list markers). txvPaint then
194 // evaluates the escape code (in pStart) to see what needs
195 // to be done.
196
197 // all the following are only set if (fIsEscapeSequence == FALSE):
198
199 ULONG ulFlags;
200 // one of the following:
201 // -- TXVWORDF_GLUEWITHNEXT: this "word" was cut because
202 // an escape sequence was found; this word must
203 // therefore be in the same line with the next word
204 // -- TXVWORDF_LINEBREAK: this word ends with a \n char;
205 // start new paragraph after this
206 // -- TXVWORDF_LINEFEED: this words ends with a \r char;
207 // start new line after this
208
209 ULONG ulCXWithSpaces, // width of word (in pels), including trailing spaces
210 ulCXWord, // width of word (in pels), without trailing spaces
211 ulCY; // height of word (in pels)
212
213 LONG lX; // X position to paint this word at;
214 // this is (re)set during word-to-rectangle correlation!
215 PTXVRECTANGLE pRectangle; // reverse pointer to the TXVRECTANGLE structure to
216 // which this word belongs; useful for repainting;
217 // this is (re)set during word-to-rectangle correlation!
218 ULONG ulBaseLineOfs; // base line offset; add this to rcl.yBottom
219 // to get the the start point to be used for
220 // GpiCharStringPosAt
221
222 LONG lcid; // logical font ID to use for this rectangle
223 LONG lPointSize; // point size to use for this rectangle;
224 // this is set to 0 for bitmap fonts
225 ULONG flOptions; // flOptions parameter for GpiCharStringPosAt;
226 // this will only have the CHS_UNDERSCORE or
227 // CHS_STRIKEOUT flags set
228
229 USHORT usAnchor; // != 0 if this word belongs to an anchor
230 } TXVWORD, *PTXVWORD;
231
232 #ifdef LINKLIST_HEADER_INCLUDED
233 /*
234 *@@ TXVRECTANGLE:
235 * this defines one line to be drawn.
236 * This is device-independent.
237 * See txvFormatText.
238 */
239
240 typedef struct _TXVRECTANGLE
241 {
242 RECTL rcl; // rectangle of this line, into which
243 // the words in llWords should be painted;
244 // the bottom of this rectangle specifies the
245 // bottommost point used (neccessary for
246 // characters with underlengths, such as
247 // "g" or "y"); ulMaxBaseLineOfs must be
248 // added to the starting point
249 // when using GpiCharStringPosAt
250 ULONG ulMaxBaseLineOfs; // highest ulBaseLineOfs of all words
251 // belonging to this rectangle.
252 LINKLIST llWords; // list of TXVWORD's which belong to this
253 // rectangle. Note that these are duplicate
254 // pointers to be able to correlate rectangles
255 // to words; there is a second list of TXVWORD's
256 // in XFORMATDATA which holds really all the
257 // words which were created (for cleanup).
258 // So one allocated TXVWORD structure can
259 // have two pointers pointing to it.
260 } TXVRECTANGLE;
261 #endif
262
263 /*
264 *@@ XFMTFONT:
265 * specifies a font to be used in
266 * XFMTCHARACTER.
267 *
268 *@@added V0.9.3 (2000-05-06) [umoeller]
269 */
270
271 typedef struct _XFMTFONT
272 {
273 LONG lcid;
274 // default font to use for this paragraph
275 FONTMETRICS FontMetrics;
276 LONG alCX[256]; // width of each ASCII character for this
277 // string; computed by txvSetFormatFont
278 } XFMTFONT, *PXFMTFONT;
279
280 /*
281 *@@ XFMTCHARACTER:
282 * character formatting parameters.
283 * This is used by the formatting engine
284 * (txvFormat)
285 * to describe character formatting.
286 * Character formatting can only be
287 * changed between words (TXVWORD).
288 *
289 *@@added V0.9.3 (2000-05-06) [umoeller]
290 */
291
292 typedef struct _XFMTCHARACTER
293 {
294 LONG lPointSize;
295 // default font size to use for this paragraph
296 XFMTFONT fntRegular,
297 fntBold,
298 fntItalics,
299 fntBoldItalics;
300 } XFMTCHARACTER, *PXFMTCHARACTER;
301
302 /*
303 *@@ XFMTPARAGRAPH:
304 * paragraph formatting parameters.
305 * This is used by the formatting engine
306 * (txvFormat)
307 * for every paragraph which is started.
308 *
309 *@@added V0.9.3 (2000-05-06) [umoeller]
310 */
311
312 typedef struct _XFMTPARAGRAPH
313 {
314 BOOL fWordWrap;
315 LONG lLeftMargin,
316 // left indentation for all lines
317 // (in pixels)
318 lRightMargin,
319 // right indentation for all lines
320 // (in pixels)
321 lFirstLineMargin;
322 // additional indentation for first line only;
323 // this is added to lLeftMargin (can be negative)
324 // (in pixels)
325 LONG lSpaceBefore,
326 // space before each paragraph
327 // (in pixels)
328 lSpaceAfter;
329 // space after each paragraph
330 // (in pixels)
331 } XFMTPARAGRAPH, *PXFMTPARAGRAPH;
332
333 #ifdef LINKLIST_HEADER_INCLUDED
334 #ifdef XSTRING_HEADER_INCLUDED
335
336 /*
337 *@@ XFORMATDATA:
338 * text formatting data. Passed to
339 * txvPaintText, stored in TEXTVIEWWINDATA.
340 * This is device-independent.
341 */
342
343 typedef struct _XFORMATDATA
344 {
345 // input to txvFormatText
346 XSTRING strViewText; // original view text
347 // from WinSetWindowText
348
349 XFMTPARAGRAPH
350 fmtpStandard; // standard paragraph format
351
352 XFMTCHARACTER
353 fmtcStandard, // format for standard text
354 fmtcCode; // format for code text (monospaced; PRE, CODE etc.)
355
356 // output from txvFormatText
357 LINKLIST llRectangles;
358 // list of TXVRECTANGLE, from top to bottom;
359 // text pointers point into pszViewText
360 LINKLIST llWords;
361 // list of TXVWORD's, in order of creation;
362 // this is just for proper cleanup. The items
363 // in the TXVRECTANGLE.llWords list also point
364 // to the words stored in this list.
365
366 ULONG ulViewportCX, // width of viewport (total text space)
367 ulViewportCY; // height of viewport (total text space)
368
369 } XFORMATDATA, *PXFORMATDATA;
370
371 VOID txvInitFormat(PXFORMATDATA pxfd);
372
373 VOID txvFormatText(HPS hps,
374 PXFORMATDATA pxfd,
375 PRECTL prclView,
376 BOOL fFullRecalc);
377 #endif
378 #endif
379
380 VOID txvStripLinefeeds(char **ppszText,
381 ULONG ulTabSize);
382
383 /* ******************************************************************
384 *
385 * Window-dependent functions
386 *
387 ********************************************************************/
388
389 /*
390 * XTextView messages:
391 *
392 */
393
394 #define TXM_QUERYCHARFORMAT (WM_USER + 1022)
395 #define TXM_SETCHARFORMAT (WM_USER + 1023)
396 #define TXM_QUERYPARFORMAT (WM_USER + 1022)
397 #define TXM_SETPARFORMAT (WM_USER + 1023)
398 #define TXM_SETWORDWRAP (WM_USER + 1024)
399 #define TXM_QUERYCDATA (WM_USER + 1025)
400 #define TXM_SETCDATA (WM_USER + 1026)
401 #define TXM_JUMPTOANCHORNAME (WM_USER + 1027)
402
403 #define WC_XTEXTVIEW "XTextViewClass"
404
405 /*
406 * XTextView nofication codes:
407 *
408 */
409
410 /*
411 *@@ TXVN_LINK:
412 * WM_CONTROL notification code posted (!)
413 * to the XTextView control's owner.
414 *
415 * Parameters:
416 *
417 * -- USHORT SHORT1FROMMP(mp1): id of the control.
418 * -- USHORT SHORT2FROMMP(mp1): nofify code (TXVN_LINK).
419 * -- USHORT mp2: index of anchor (1 >= index > 0xFFFF).
420 *
421 *@@added V0.9.3 (2000-05-18) [umoeller]
422 */
423
424 #define TXVN_LINK 1
425
426 /*
427 * XTextView style flags:
428 *
429 */
430
431 #define XTXF_VSCROLL 0x0100
432 #define XTXF_HSCROLL 0x0200
433 #define XTXF_AUTOVHIDE 0x0400
434 #define XTXF_AUTOHHIDE 0x0800
435
436 /*
437 *@@ XTEXTVIEWCDATA:
438 * control data structure for text view
439 * control. This can be passed to
440 * WinCreateWindow with the pCtlData
441 * parameter. You then MUST set the
442 * "cbData" field to sizeof(XTEXTVIEWCDATA).
443 */
444
445 typedef struct _XTEXTVIEWCDATA
446 {
447 USHORT cbData;
448 ULONG flStyle;
449 // XTXF_* flags:
450 // -- XTXF_VSCROLL: show vertical scroll bar.
451 // -- XTXF_HSCROLL: show horizontal scroll bar.
452 // -- XTXF_AUTOVHIDE: with XTXF_VSCROLL: automatically hide scrollbar.
453 // -- XTXF_AUTOHHIDE: with XTXF_HSCROLL: automatically hide scrollbar.
454 ULONG ulXBorder,
455 // space to leave on the left and right of text view;
456 // defaults to 0
457 ulYBorder;
458 // space to leave on the top and bottom of text view;
459 // defaults to 0
460 ULONG ulVScrollLineUnit,
461 // pixels to scroll if scroll bar "up" or "down" button
462 // is pressed; defaults to 15
463 ulHScrollLineUnit;
464 // pixels to scroll if scroll bar "left" or "right" button
465 // is pressed; defaults to 15
466 } XTEXTVIEWCDATA, *PXTEXTVIEWCDATA;
467
468
469 BOOL txvRegisterTextView(HAB hab);
470
471 HWND txvReplaceWithTextView(HWND hwndParentAndOwner,
472 USHORT usID,
473 ULONG flWinStyle,
474 ULONG flStyle,
475 USHORT usBorder);
476
477 /* ******************************************************************
478 *
479 * Printer-dependent functions
480 *
481 ********************************************************************/
482
483 typedef BOOL APIENTRY FNPRINTCALLBACK(ULONG ulPage,
484 ULONG ulUser);
485
486 #ifdef INCL_SPL
487 BOOL txvPrint(HAB hab,
488 HDC hdc,
489 HPS hps,
490 PSZ pszViewText,
491 ULONG ulSize,
492 PSZ pszFaceName,
493 HCINFO *phci,
494 PSZ pszDocTitle,
495 FNPRINTCALLBACK *pfnCallback);
496 #endif
497
498 int txvPrintWindow(HWND hwndTextView,
499 PSZ pszDocTitle,
500 FNPRINTCALLBACK *pfnCallback);
501
502#endif
503
504#if __cplusplus
505}
506#endif
507
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