2 * RichEdit - structures and constant
4 * Copyright 2004 by Krzysztof Foltman
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #define _WIN32_IE 0x0400
42 #include "wine/debug.h"
44 typedef struct tagME_String
50 typedef struct tagME_Style
54 HFONT hFont; /* cached font for the style */
55 TEXTMETRICW tm; /* cached font metrics for the style */
56 int nRefs; /* reference count */
57 int nSequence; /* incremented when cache needs to be rebuilt, ie. every screen redraw */
61 diTextStart, /* start of the text buffer */
62 diParagraph, /* paragraph start */
63 diRun, /* run (sequence of chars with the same character format) */
64 diStartRow, /* start of the row (line of text on the screen) */
65 diTextEnd, /* end of the text buffer */
67 /********************* these below are meant for finding only *********************/
68 diStartRowOrParagraph, /* 5 */
69 diStartRowOrParagraphOrEnd,
73 diRunOrParagraphOrEnd, /* 10 */
75 diUndoInsertRun, /* 11 */
76 diUndoDeleteRun, /* 12 */
77 diUndoJoinParagraphs, /* 13 */
78 diUndoSplitParagraph, /* 14 */
79 diUndoSetParagraphFormat, /* 15 */
80 diUndoSetCharFormat, /* 16 */
81 diUndoEndTransaction, /* 17 */
82 diUndoSetDefaultCharFormat, /* 18 */
85 /******************************** run flags *************************/
86 #define MERF_STYLEFLAGS 0x0FFF
87 /* run contains non-text content, which has its own rules for wrapping, sizing etc */
88 #define MERF_GRAPHICS 1
89 /* run is a tab (or, in future, any kind of content whose size is dependent on run position) */
92 /* run is splittable (contains white spaces in the middle or end) */
93 #define MERF_SPLITTABLE 0x001000
94 /* run starts with whitespaces */
95 #define MERF_STARTWHITE 0x002000
96 /* run ends with whitespaces */
97 #define MERF_ENDWHITE 0x004000
98 /* run is completely made of whitespaces */
99 #define MERF_WHITESPACE 0x008000
100 /* run is a last (dummy) run in the paragraph */
101 #define MERF_SKIPPED 0x010000
102 /* flags that are calculated during text wrapping */
103 #define MERF_CALCBYWRAP 0x0F0000
104 /* the "end of paragraph" run, contains 1 character */
105 #define MERF_ENDPARA 0x100000
107 /* runs with any of these flags set cannot be joined */
108 #define MERF_NOJOIN (MERF_GRAPHICS|MERF_TAB|MERF_ENDPARA)
109 /* runs that don't contain real text */
110 #define MERF_NOTEXT (MERF_GRAPHICS|MERF_TAB|MERF_ENDPARA)
112 /* those flags are kept when the row is split */
113 #define MERF_SPLITMASK (~(0))
115 /******************************** para flags *************************/
117 /* this paragraph was already wrapped and hasn't changed, every change resets that flag */
118 #define MEPF_REWRAP 1
119 #define MEPF_REPAINT 2
121 /******************************** structures *************************/
123 struct tagME_DisplayItem;
125 typedef struct tagME_Run
129 int nCharOfs; /* relative to para's offset */
130 int nWidth; /* width of full run, width of leading&trailing ws */
132 int nAscent, nDescent; /* pixels above/below baseline */
133 POINT pt; /* relative to para's position */
136 typedef struct tagME_Document {
137 struct tagME_DisplayItem *def_char_style;
138 struct tagME_DisplayItem *def_para_style;
139 int last_wrapped_line;
142 typedef struct tagME_Paragraph
145 int nLeftMargin, nRightMargin, nFirstMargin;
149 int nLastPaintYPos, nLastPaintHeight;
151 struct tagME_DisplayItem *prev_para, *next_para, *document;
154 typedef struct tagME_Row
164 /* the display item list layout is like this:
165 * - the document consists of paragraphs
166 * - each paragraph contains at least one run, the last run in the paragraph
167 * is an end-of-paragraph run
168 * - each formatted paragraph contains at least one row, which corresponds
169 * to a screen line (that's why there are no rows in an unformatted
171 * - the paragraphs contain "shortcut" pointers to the previous and the next
172 * paragraph, that makes iteration over paragraphs faster
173 * - the list starts with diTextStart and ends with diTextEnd
176 typedef struct tagME_DisplayItem
179 struct tagME_DisplayItem *prev, *next;
184 ME_Document doc; /* not used */
185 ME_Style *ustyle; /* used by diUndoSetCharFormat */
189 typedef struct tagME_UndoItem
195 typedef struct tagME_TextBuffer
197 ME_DisplayItem *pFirst, *pLast;
198 ME_Style *pCharStyle;
199 ME_Style *pDefaultStyle;
202 typedef struct tagME_Cursor
204 ME_DisplayItem *pRun;
215 typedef struct tagME_FontTableItem {
221 #define STREAMIN_BUFFER_SIZE 4096 /* M$ compatibility */
223 struct tagME_InStream {
224 EDITSTREAM *editstream;
227 char buffer[STREAMIN_BUFFER_SIZE];
229 typedef struct tagME_InStream ME_InStream;
232 #define STREAMOUT_BUFFER_SIZE 4096
233 #define STREAMOUT_FONTTBL_SIZE 8192
234 #define STREAMOUT_COLORTBL_SIZE 1024
236 typedef struct tagME_OutStream {
238 char buffer[STREAMOUT_BUFFER_SIZE];
242 ME_FontTableItem fonttbl[STREAMOUT_FONTTBL_SIZE];
244 COLORREF colortbl[STREAMOUT_COLORTBL_SIZE];
246 UINT nDefaultCodePage;
249 typedef struct tagME_FontCacheItem
257 #define HFONT_CACHE_SIZE 10
259 typedef struct tagME_TextEditor
262 BOOL bEmulateVersion10;
264 ME_TextBuffer *pBuffer;
268 int nTotalLength, nLastTotalLength;
271 int nOldSelFrom, nOldSelTo;
272 COLORREF rgbBackColor;
273 HBRUSH hbrBackground;
277 ME_DisplayItem *pUndoStack, *pRedoStack;
278 ME_UndoMode nUndoMode;
280 int nLastSelStart, nLastSelEnd;
281 ME_FontCacheItem pFontCache[HFONT_CACHE_SIZE];
282 ME_OutStream *pStream;
283 BOOL bScrollX, bScrollY;
285 int nZoomNumerator, nZoomDenominator;
289 EDITWORDBREAKPROCW pfnWordBreak;
292 typedef struct tagME_Context
300 /* those are valid inside ME_WrapTextParagraph and related */
302 ME_TextEditor *editor;
306 typedef struct tagME_WrapContext
310 int nLeftMargin, nRightMargin, nFirstMargin;
311 int nTotalWidth, nAvailWidth;
315 ME_DisplayItem *pRowStart;
317 ME_DisplayItem *pLastSplittableRun;
318 POINT ptLastSplittableRun;