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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 #include <limits.h>
  33
  34 #define COBJMACROS
  35
  36 #include <windef.h>
  37 #include <winbase.h>
  38 #include <winnls.h>
  39 #include <winnt.h>
  40 #include <wingdi.h>
  41 #include <winuser.h>
  42 #include <richedit.h>
  43 #include <commctrl.h>
  44 #include <ole2.h>
  45 #include <richole.h>
  46 #include "imm.h"
  47 #include <textserv.h>
  48 #include "usp10.h"
  49
  50 #include "wine/debug.h"
  51 #include "wine/heap.h"
  52 #include "wine/list.h"
  53
  54 #if defined(__i386__) && !defined(__MINGW32__)
  55 extern const struct ITextHostVtbl itextHostStdcallVtbl DECLSPEC_HIDDEN;
  56 #endif /* __i386__ */
  57
  58 typedef struct tagME_String
  59 {
  60   WCHAR *szData;
  61   int nLen, nBuffer;
  62   void (*free)(struct tagME_String *);
  63 } ME_String;
  64
  65 typedef struct tagME_FontCacheItem
  66 {
  67   LOGFONTW lfSpecs;
  68   HFONT hFont;
  69   int nRefs;
  70   int nAge;
  71 } ME_FontCacheItem;
  72
  73 #define HFONT_CACHE_SIZE 10
  74
  75 typedef struct tagME_Style
  76 {
  77   CHARFORMAT2W fmt;
  78
  79   ME_FontCacheItem *font_cache; /* cached font for the style */
  80   TEXTMETRICW tm; /* cached font metrics for the style */
  81   int nRefs; /* reference count */
  82   SCRIPT_CACHE script_cache;
  83   struct list entry;
  84 } ME_Style;
  85
  86 typedef enum {
  87   diInvalid,
  88   diTextStart, /* start of the text buffer */
  89   diParagraph, /* paragraph start */
  90   diCell, /* cell start */
  91   diRun, /* run (sequence of chars with the same character format) */
  92   diStartRow, /* start of the row (line of text on the screen) */
  93   diTextEnd, /* end of the text buffer */
  94
  95   /********************* these below are meant for finding only *********************/
  96   diStartRowOrParagraph, /* 7 */
  97   diStartRowOrParagraphOrEnd,
  98   diRunOrParagraph,
  99   diRunOrStartRow,
 100   diParagraphOrEnd,
 101   diRunOrParagraphOrEnd, /* 12 */
 102 } ME_DIType;
 103
 104 #define SELECTIONBAR_WIDTH 8
 105
 106 /******************************** run flags *************************/
 107 #define MERF_STYLEFLAGS 0x0FFF
 108 /* run contains non-text content, which has its own rules for wrapping, sizing etc */
 109 #define MERF_GRAPHICS   0x001
 110 /* run is a tab (or, in future, any kind of content whose size is dependent on run position) */
 111 #define MERF_TAB        0x002
 112 /* run is a cell boundary */
 113 #define MERF_ENDCELL    0x004 /* v4.1 */
 114
 115 #define MERF_NONTEXT (MERF_GRAPHICS | MERF_TAB | MERF_ENDCELL)
 116
 117 /* run is splittable (contains white spaces in the middle or end) */
 118 #define MERF_SPLITTABLE 0x001000
 119 /* run starts with whitespaces */
 120 #define MERF_STARTWHITE 0x002000
 121 /* run ends with whitespaces */
 122 #define MERF_ENDWHITE   0x004000
 123 /* run is completely made of whitespaces */
 124 #define MERF_WHITESPACE 0x008000
 125 /* the "end of paragraph" run, contains 1 character */
 126 #define MERF_ENDPARA    0x100000
 127 /* forcing the "end of row" run, contains 1 character */
 128 #define MERF_ENDROW     0x200000
 129 /* run is hidden */
 130 #define MERF_HIDDEN     0x400000
 131 /* start of a table row has an empty paragraph that should be skipped over. */
 132 #define MERF_TABLESTART 0x800000 /* v4.1 */
 133
 134 /* runs with any of these flags set cannot be joined */
 135 #define MERF_NOJOIN (MERF_GRAPHICS|MERF_TAB|MERF_ENDPARA|MERF_ENDROW)
 136 /* runs that don't contain real text */
 137 #define MERF_NOTEXT (MERF_GRAPHICS|MERF_TAB|MERF_ENDPARA|MERF_ENDROW)
 138
 139 /* those flags are kept when the row is split */
 140 #define MERF_SPLITMASK (~(0))
 141
 142 /******************************** para flags *************************/
 143
 144 /* this paragraph was already wrapped and hasn't changed, every change resets that flag */
 145 #define MEPF_REWRAP   0x01
 146 /* v4.1 */
 147 #define MEPF_CELL     0x04 /* The paragraph is nested in a cell */
 148 #define MEPF_ROWSTART 0x08 /* Hidden empty paragraph at the start of the row */
 149 #define MEPF_ROWEND   0x10 /* Visible empty paragraph at the end of the row */
 150 #define MEPF_COMPLEX  0x20 /* Use uniscribe */
 151
 152 /******************************** structures *************************/
 153
 154 struct tagME_DisplayItem;
 155
 156 struct re_object
 157 {
 158   struct list entry;
 159   REOBJECT obj;
 160 };
 161
 162 typedef struct tagME_Run
 163 {
 164   ME_Style *style;
 165   struct tagME_Paragraph *para; /* ptr to the run's paragraph */
 166   int nCharOfs; /* relative to para's offset */
 167   int len;      /* length of run's text */
 168   int nWidth; /* width of full run, width of leading&trailing ws */
 169   int nFlags;
 170   int nAscent, nDescent; /* pixels above/below baseline */
 171   POINT pt; /* relative to para's position */
 172   struct re_object *reobj; /* FIXME: should be a union with strText (at least) */
 173
 174   SCRIPT_ANALYSIS script_analysis;
 175   int num_glyphs, max_glyphs;
 176   WORD *glyphs;
 177   SCRIPT_VISATTR *vis_attrs;
 178   int *advances;
 179   GOFFSET *offsets;
 180   int max_clusters;
 181   WORD *clusters;
 182 } ME_Run;
 183
 184 typedef struct tagME_Border
 185 {
 186   int width;
 187   COLORREF colorRef;
 188 } ME_Border;
 189
 190 typedef struct tagME_BorderRect
 191 {
 192   ME_Border top;
 193   ME_Border left;
 194   ME_Border bottom;
 195   ME_Border right;
 196 } ME_BorderRect;
 197
 198 struct para_num
 199 {
 200     ME_Style *style;
 201     ME_String *text;
 202     INT width;
 203     POINT pt;
 204 };
 205
 206 typedef struct tagME_Paragraph
 207 {
 208   PARAFORMAT2 fmt;
 209   ME_String *text;
 210
 211   struct tagME_DisplayItem *pCell; /* v4.1 */
 212   ME_BorderRect border;
 213
 214   int nCharOfs;
 215   int nFlags;
 216   POINT pt;
 217   int nHeight, nWidth;
 218   int nRows;
 219   struct para_num para_num;
 220   ME_Run *eop_run; /* ptr to the end-of-para run */
 221   struct tagME_DisplayItem *prev_para, *next_para;
 222   struct tagME_DisplayItem *prev_marked, *next_marked;
 223 } ME_Paragraph;
 224
 225 typedef struct tagME_Cell /* v4.1 */
 226 {
 227   int nNestingLevel; /* 0 for normal cells, and greater for nested cells */
 228   int nRightBoundary;
 229   ME_BorderRect border;
 230   POINT pt;
 231   int nHeight, nWidth;
 232   int yTextOffset; /* The text offset is caused by the largest top border. */
 233   struct tagME_DisplayItem *prev_cell, *next_cell, *parent_cell;
 234 } ME_Cell;
 235
 236 typedef struct tagME_Row
 237 {
 238   int nHeight;
 239   int nBaseline;
 240   int nWidth;
 241   int nLMargin;
 242   int nRMargin;
 243   POINT pt;
 244 } ME_Row;
 245
 246 /* the display item list layout is like this:
 247  * - the document consists of paragraphs
 248  * - each paragraph contains at least one run, the last run in the paragraph
 249  *   is an end-of-paragraph run
 250  * - each formatted paragraph contains at least one row, which corresponds
 251  *   to a screen line (that's why there are no rows in an unformatted
 252  *   paragraph
 253  * - the paragraphs contain "shortcut" pointers to the previous and the next
 254  *   paragraph, that makes iteration over paragraphs faster
 255  * - the list starts with diTextStart and ends with diTextEnd
 256  */
 257
 258 typedef struct tagME_DisplayItem
 259 {
 260   ME_DIType type;
 261   struct tagME_DisplayItem *prev, *next;
 262   union {
 263     ME_Run run;
 264     ME_Row row;
 265     ME_Cell cell;
 266     ME_Paragraph para;
 267   } member;
 268 } ME_DisplayItem;
 269
 270 typedef struct tagME_TextBuffer
 271 {
 272   ME_DisplayItem *pFirst, *pLast;
 273   ME_Style *pCharStyle;
 274   ME_Style *pDefaultStyle;
 275 } ME_TextBuffer;
 276
 277 typedef struct tagME_Cursor
 278 {
 279   ME_DisplayItem *pPara;
 280   ME_DisplayItem *pRun;
 281   int nOffset;
 282 } ME_Cursor;
 283
 284 typedef enum {
 285   umAddToUndo,
 286   umAddToRedo,
 287   umIgnore,
 288   umAddBackToUndo
 289 } ME_UndoMode;
 290
 291 enum undo_type
 292 {
 293     undo_insert_run,
 294     undo_delete_run,
 295     undo_join_paras,
 296     undo_split_para,
 297     undo_set_para_fmt,
 298     undo_set_char_fmt,
 299     undo_end_transaction,          /* marks the end of a group of changes for undo */
 300     undo_potential_end_transaction /* allows grouping typed chars for undo */
 301 };
 302
 303 struct insert_run_item
 304 {
 305     int pos, len;
 306     WCHAR *str;
 307     ME_Style *style;
 308     DWORD flags;
 309 };
 310
 311 struct delete_run_item
 312 {
 313     int pos, len;
 314 };
 315
 316 struct join_paras_item
 317 {
 318     int pos;
 319 };
 320
 321 struct split_para_item
 322 {
 323     int pos;
 324     PARAFORMAT2 fmt;
 325     ME_BorderRect border;
 326     ME_String *eol_str;
 327     DWORD flags;
 328     ME_BorderRect cell_border;
 329     int cell_right_boundary;
 330 };
 331
 332 struct set_para_fmt_item
 333 {
 334     int pos;
 335     PARAFORMAT2 fmt;
 336     ME_BorderRect border;
 337 };
 338
 339 struct set_char_fmt_item
 340 {
 341     int pos, len;
 342     CHARFORMAT2W fmt;
 343 };
 344
 345 struct undo_item
 346 {
 347     struct list entry;
 348     enum undo_type type;
 349     union
 350     {
 351         struct insert_run_item insert_run;
 352         struct delete_run_item delete_run;
 353         struct join_paras_item join_paras;
 354         struct split_para_item split_para;
 355         struct set_para_fmt_item set_para_fmt;
 356         struct set_char_fmt_item set_char_fmt;
 357     } u;
 358 };
 359
 360 typedef enum {
 361   stPosition = 0,
 362   stWord,
 363   stLine,
 364   stParagraph,
 365   stDocument
 366 } ME_SelectionType;
 367
 368 typedef struct tagME_FontTableItem {
 369   BYTE bCharSet;
 370   WCHAR *szFaceName;
 371 } ME_FontTableItem;
 372
 373
 374 #define STREAMIN_BUFFER_SIZE 4096 /* M$ compatibility */
 375
 376 struct tagME_InStream {
 377   EDITSTREAM *editstream;
 378   DWORD dwSize;
 379   DWORD dwUsed;
 380   char buffer[STREAMIN_BUFFER_SIZE];
 381 };
 382 typedef struct tagME_InStream ME_InStream;
 383
 384 typedef struct tagME_TextEditor
 385 {
 386   HWND hWnd, hwndParent;
 387   ITextHost *texthost;
 388   IUnknown *reOle;
 389   BOOL bEmulateVersion10;
 390   ME_TextBuffer *pBuffer;
 391   ME_Cursor *pCursors;
 392   DWORD styleFlags;
 393   DWORD exStyleFlags;
 394   int nCursors;
 395   SIZE sizeWindow;
 396   int nTotalLength, nLastTotalLength;
 397   int nTotalWidth, nLastTotalWidth;
 398   int nAvailWidth; /* 0 = wrap to client area, else wrap width in twips */
 399   int nUDArrowX;
 400   int total_rows;
 401   COLORREF rgbBackColor;
 402   HBRUSH hbrBackground;
 403   BOOL bCaretAtEnd;
 404   int nEventMask;
 405   int nModifyStep;
 406   struct list undo_stack;
 407   struct list redo_stack;
 408   int nUndoStackSize;
 409   int nUndoLimit;
 410   ME_UndoMode nUndoMode;
 411   int nParagraphs;
 412   int nLastSelStart, nLastSelEnd;
 413   ME_DisplayItem *pLastSelStartPara, *pLastSelEndPara;
 414   ME_FontCacheItem pFontCache[HFONT_CACHE_SIZE];
 415   int nZoomNumerator, nZoomDenominator;
 416   RECT prevClientRect;
 417   RECT rcFormat;
 418   BOOL bDefaultFormatRect;
 419   BOOL bWordWrap;
 420   int nTextLimit;
 421   EDITWORDBREAKPROCW pfnWordBreak;
 422   LPRICHEDITOLECALLBACK lpOleCallback;
 423   /*TEXTMODE variable; contains only one of each of the following options:
 424    *TM_RICHTEXT or TM_PLAINTEXT
 425    *TM_SINGLELEVELUNDO or TM_MULTILEVELUNDO
 426    *TM_SINGLECODEPAGE or TM_MULTICODEPAGE*/
 427   int mode;
 428   BOOL bHideSelection;
 429   BOOL AutoURLDetect_bEnable;
 430   WCHAR cPasswordMask;
 431   BOOL bHaveFocus;
 432   BOOL bDialogMode; /* Indicates that we are inside a dialog window */
 433   /*for IME */
 434   int imeStartIndex;
 435   DWORD selofs; /* The size of the selection bar on the left side of control */
 436   ME_SelectionType nSelectionType;
 437   ME_DisplayItem *first_marked_para;
 438
 439   /* Track previous notified selection */
 440   CHARRANGE notified_cr;
 441
 442   /* Cache previously set scrollbar info */
 443   SCROLLINFO vert_si, horz_si;
 444
 445   int caret_height;
 446   BOOL caret_hidden;
 447   BOOL bMouseCaptured;
 448   int wheel_remain;
 449   struct list style_list;
 450   struct list reobj_list;
 451 } ME_TextEditor;
 452
 453 typedef struct tagME_Context
 454 {
 455   HDC hDC;
 456   POINT pt;
 457   RECT rcView;
 458   SIZE dpi;
 459   int nAvailWidth;
 460
 461   /* those are valid inside ME_WrapTextParagraph and related */
 462   ME_TextEditor *editor;
 463 } ME_Context;
 464
 465 #endif