dlls/riched20/editstr.h

   1 /*
   2  * RichEdit - structures and constant
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #ifndef __EDITSTR_H
  22 #define __EDITSTR_H
  23
  24 #ifndef _WIN32_IE
  25 #define _WIN32_IE 0x0400
  26 #endif
  27
  28 #include <assert.h>
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32
  33 #include <windef.h>
  34 #include <winbase.h>
  35 #include <winnls.h>
  36 #include <winnt.h>
  37 #include <wingdi.h>
  38 #include <winuser.h>
  39 #include <richedit.h>
  40 #include <commctrl.h>
  41
  42 #include "wine/debug.h"
  43
  44 typedef struct tagME_String
  45 {
  46   WCHAR *szData;
  47   int nLen, nBuffer;
  48 } ME_String;
  49
  50 typedef struct tagME_Style
  51 {
  52   CHARFORMAT2W fmt;
  53
  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 */
  58 } ME_Style;
  59
  60 typedef enum {
  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 */
  66
  67   /********************* these below are meant for finding only *********************/
  68   diStartRowOrParagraph, /* 5 */
  69   diStartRowOrParagraphOrEnd,
  70   diRunOrParagraph,
  71   diRunOrStartRow,
  72   diParagraphOrEnd,
  73   diRunOrParagraphOrEnd, /* 10 */
  74
  75   diUndoInsertRun, /* 11 */
  76   diUndoDeleteRun, /* 12 */
  77   diUndoJoinParagraphs, /* 13 */
  78   diUndoSplitParagraph, /* 14 */
  79   diUndoSetParagraphFormat, /* 15 */
  80   diUndoSetCharFormat, /* 16 */
  81   diUndoEndTransaction, /* 17 */
  82   diUndoSetDefaultCharFormat, /* 18 */
  83 } ME_DIType;
  84
  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) */
  90 #define MERF_TAB 2
  91
  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
 106
 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)
 111
 112 /* those flags are kept when the row is split */
 113 #define MERF_SPLITMASK (~(0))
 114
 115 /******************************** para flags *************************/
 116
 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
 120
 121 /******************************** structures *************************/
 122
 123 struct tagME_DisplayItem;
 124
 125 typedef struct tagME_Run
 126 {
 127   ME_String *strText;
 128   ME_Style *style;
 129   int nCharOfs; /* relative to para's offset */
 130   int nWidth; /* width of full run, width of leading&trailing ws */
 131   int nFlags;
 132   int nAscent, nDescent; /* pixels above/below baseline */
 133   POINT pt; /* relative to para's position */
 134 } ME_Run;
 135
 136 typedef struct tagME_Document {
 137   struct tagME_DisplayItem *def_char_style;
 138   struct tagME_DisplayItem *def_para_style;
 139   int last_wrapped_line;
 140 } ME_Document;
 141
 142 typedef struct tagME_Paragraph
 143 {
 144   PARAFORMAT2 *pFmt;
 145   int nLeftMargin, nRightMargin, nFirstMargin;
 146   int nCharOfs;
 147   int nFlags;
 148   int nYPos, nHeight;
 149   int nLastPaintYPos, nLastPaintHeight;
 150   int nRows;
 151   struct tagME_DisplayItem *prev_para, *next_para, *document;
 152 } ME_Paragraph;
 153
 154 typedef struct tagME_Row
 155 {
 156   int nHeight;
 157   int nBaseline;
 158   int nWidth;
 159   int nLMargin;
 160   int nRMargin;
 161   int nYPos;
 162 } ME_Row;
 163
 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
 170  *   paragraph
 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
 174  */
 175
 176 typedef struct tagME_DisplayItem
 177 {
 178   ME_DIType type;
 179   struct tagME_DisplayItem *prev, *next;
 180   union {
 181     ME_Run run;
 182     ME_Row row;
 183     ME_Paragraph para;
 184     ME_Document doc; /* not used */
 185     ME_Style *ustyle; /* used by diUndoSetCharFormat */
 186   } member;
 187 } ME_DisplayItem;
 188
 189 typedef struct tagME_UndoItem
 190 {
 191   ME_DisplayItem di;
 192   int nStart, nLen;
 193 } ME_UndoItem;
 194
 195 typedef struct tagME_TextBuffer
 196 {
 197   ME_DisplayItem *pFirst, *pLast;
 198   ME_Style *pCharStyle;
 199   ME_Style *pDefaultStyle;
 200 } ME_TextBuffer;
 201
 202 typedef struct tagME_Cursor
 203 {
 204   ME_DisplayItem *pRun;
 205   int nOffset;
 206 } ME_Cursor;
 207
 208 typedef enum {
 209   umAddToUndo,
 210   umAddToRedo,
 211   umIgnore,
 212   umAddBackToUndo
 213 } ME_UndoMode;
 214
 215 typedef struct tagME_FontTableItem {
 216   BYTE bCharSet;
 217   WCHAR *szFaceName;
 218 } ME_FontTableItem;
 219
 220
 221 #define STREAMIN_BUFFER_SIZE 4096 /* M$ compatibility */
 222
 223 struct tagME_InStream {
 224   EDITSTREAM *editstream;
 225   DWORD dwSize;
 226   DWORD dwUsed;
 227   char buffer[STREAMIN_BUFFER_SIZE];
 228 };
 229 typedef struct tagME_InStream ME_InStream;
 230
 231
 232 #define STREAMOUT_BUFFER_SIZE 4096
 233 #define STREAMOUT_FONTTBL_SIZE 8192
 234 #define STREAMOUT_COLORTBL_SIZE 1024
 235
 236 typedef struct tagME_OutStream {
 237   EDITSTREAM *stream;
 238   char buffer[STREAMOUT_BUFFER_SIZE];
 239   UINT pos, written;
 240   UINT nCodePage;
 241   UINT nFontTblLen;
 242   ME_FontTableItem fonttbl[STREAMOUT_FONTTBL_SIZE];
 243   UINT nColorTblLen;
 244   COLORREF colortbl[STREAMOUT_COLORTBL_SIZE];
 245   UINT nDefaultFont;
 246   UINT nDefaultCodePage;
 247 } ME_OutStream;
 248
 249 typedef struct tagME_FontCacheItem
 250 {
 251   LOGFONTW lfSpecs;
 252   HFONT hFont;
 253   int nRefs;
 254   int nAge;
 255 } ME_FontCacheItem;
 256
 257 #define HFONT_CACHE_SIZE 10
 258
 259 typedef struct tagME_TextEditor
 260 {
 261   HWND hWnd;
 262   BOOL bEmulateVersion10;
 263   BOOL bCaretShown;
 264   ME_TextBuffer *pBuffer;
 265   ME_Cursor *pCursors;
 266   int nCursors;
 267   SIZE sizeWindow;
 268   int nTotalLength, nLastTotalLength;
 269   int nUDArrowX;
 270   int nSequence;
 271   int nOldSelFrom, nOldSelTo;
 272   COLORREF rgbBackColor;
 273   HBRUSH hbrBackground;
 274   BOOL bCaretAtEnd;
 275   int nEventMask;
 276   int nModifyStep;
 277   ME_DisplayItem *pUndoStack, *pRedoStack;
 278   ME_UndoMode nUndoMode;
 279   int nParagraphs;
 280   int nLastSelStart, nLastSelEnd;
 281   ME_FontCacheItem pFontCache[HFONT_CACHE_SIZE];
 282   ME_OutStream *pStream;
 283   BOOL bScrollX, bScrollY;
 284   int nScrollPosY;
 285   int nZoomNumerator, nZoomDenominator;
 286   RECT rcFormat;
 287   BOOL bRedraw;
 288 } ME_TextEditor;
 289
 290 typedef struct tagME_Context
 291 {
 292   HDC hDC;
 293   POINT pt;
 294   POINT ptRowOffset;
 295   RECT rcView;
 296   HBRUSH hbrMargin;
 297
 298   /* those are valid inside ME_WrapTextParagraph and related */
 299   POINT ptFirstRun;
 300   ME_TextEditor *editor;
 301   int nSequence;
 302 } ME_Context;
 303
 304 typedef struct tagME_WrapContext
 305 {
 306   ME_Style *style;
 307   ME_Context *context;
 308   int nLeftMargin, nRightMargin, nFirstMargin;
 309   int nTotalWidth, nAvailWidth;
 310   int nRow;
 311   POINT pt;
 312   BOOL bOverflown;
 313   ME_DisplayItem *pRowStart;
 314
 315   ME_DisplayItem *pLastSplittableRun;
 316   POINT ptLastSplittableRun;
 317 } ME_WrapContext;
 318
 319 #endif