dlls/riched20/editor.h

   1 /*
   2  * RichEdit - prototypes for functions and macro definitions
   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 #include "editstr.h"
  22 #include "wine/unicode.h"
  23
  24 struct _RTF_Info;
  25
  26 extern HANDLE me_heap;
  27
  28 static inline void * __WINE_ALLOC_SIZE(1) heap_alloc( size_t len )
  29 {
  30     return HeapAlloc( me_heap, 0, len );
  31 }
  32
  33 static inline BOOL heap_free( void *ptr )
  34 {
  35     return HeapFree( me_heap, 0, ptr );
  36 }
  37
  38 static inline void * __WINE_ALLOC_SIZE(2) heap_realloc( void *ptr, size_t len )
  39 {
  40     return HeapReAlloc( me_heap, 0, ptr, len );
  41 }
  42
  43 #define ALLOC_OBJ(type) heap_alloc(sizeof(type))
  44 #define ALLOC_N_OBJ(type, count) heap_alloc((count)*sizeof(type))
  45 #define FREE_OBJ(ptr) heap_free(ptr)
  46
  47 #define RUN_IS_HIDDEN(run) ((run)->style->fmt.dwMask & CFM_HIDDEN \
  48                              && (run)->style->fmt.dwEffects & CFE_HIDDEN)
  49
  50 #define InitFormatEtc(fe, cf, med) \
  51         {\
  52         (fe).cfFormat=cf;\
  53         (fe).dwAspect=DVASPECT_CONTENT;\
  54         (fe).ptd=NULL;\
  55         (fe).tymed=med;\
  56         (fe).lindex=-1;\
  57         };
  58
  59 /* style.c */
  60 ME_Style *ME_MakeStyle(CHARFORMAT2W *style);
  61 void ME_AddRefStyle(ME_Style *item);
  62 void ME_ReleaseStyle(ME_Style *item);
  63 ME_Style *ME_GetInsertStyle(ME_TextEditor *editor, int nCursor);
  64 ME_Style *ME_ApplyStyle(ME_Style *sSrc, CHARFORMAT2W *style);
  65 HFONT ME_SelectStyleFont(ME_Context *c, ME_Style *s);
  66 void ME_UnselectStyleFont(ME_Context *c, ME_Style *s, HFONT hOldFont);
  67 void ME_InitCharFormat2W(CHARFORMAT2W *pFmt);
  68 void ME_SaveTempStyle(ME_TextEditor *editor);
  69 void ME_ClearTempStyle(ME_TextEditor *editor);
  70 void ME_DumpStyleToBuf(CHARFORMAT2W *pFmt, char buf[2048]);
  71 void ME_DumpStyle(ME_Style *s);
  72 CHARFORMAT2W *ME_ToCF2W(CHARFORMAT2W *to, CHARFORMAT2W *from);
  73 void ME_CopyToCFAny(CHARFORMAT2W *to, CHARFORMAT2W *from);
  74 void ME_CopyCharFormat(CHARFORMAT2W *pDest, const CHARFORMAT2W *pSrc); /* only works with 2W structs */
  75 void ME_CharFormatFromLogFont(HDC hDC, const LOGFONTW *lf, CHARFORMAT2W *fmt); /* ditto */
  76
  77 /* list.c */
  78 void ME_InsertBefore(ME_DisplayItem *diWhere, ME_DisplayItem *diWhat);
  79 void ME_Remove(ME_DisplayItem *diWhere);
  80 BOOL ME_NextRun(ME_DisplayItem **para, ME_DisplayItem **run);
  81 BOOL ME_PrevRun(ME_DisplayItem **para, ME_DisplayItem **run);
  82 ME_DisplayItem *ME_FindItemBack(ME_DisplayItem *di, ME_DIType nTypeOrClass);
  83 ME_DisplayItem *ME_FindItemFwd(ME_DisplayItem *di, ME_DIType nTypeOrClass);
  84 ME_DisplayItem *ME_FindItemBackOrHere(ME_DisplayItem *di, ME_DIType nTypeOrClass);
  85 ME_DisplayItem *ME_MakeDI(ME_DIType type);
  86 void ME_DestroyDisplayItem(ME_DisplayItem *item);
  87 void ME_DumpDocument(ME_TextBuffer *buffer);
  88 const char *ME_GetDITypeName(ME_DIType type);
  89
  90 /* string.c */
  91 ME_String *ME_MakeStringN(LPCWSTR szText, int nMaxChars);
  92 ME_String *ME_MakeStringR(WCHAR cRepeat, int nMaxChars);
  93 ME_String *ME_StrDup(const ME_String *s);
  94 void ME_DestroyString(ME_String *s);
  95 void ME_AppendString(ME_String *s1, const ME_String *s2);
  96 ME_String *ME_VSplitString(ME_String *orig, int nVPos);
  97 int ME_IsWhitespaces(const ME_String *s);
  98 int ME_IsSplitable(const ME_String *s);
  99 int ME_FindNonWhitespaceV(const ME_String *s, int nVChar);
 100 int ME_CallWordBreakProc(ME_TextEditor *editor, ME_String *str, INT start, INT code);
 101 void ME_StrDeleteV(ME_String *s, int nVChar, int nChars);
 102 /* smart helpers for A<->W conversions, they reserve/free memory and call MultiByte<->WideChar functions */
 103 LPWSTR ME_ToUnicode(BOOL unicode, LPVOID psz);
 104 void ME_EndToUnicode(BOOL unicode, LPVOID psz);
 105
 106 static inline int ME_IsWSpace(WCHAR ch)
 107 {
 108   return ch > '\0' && ch <= ' ';
 109 }
 110
 111 static inline int ME_CharCompare(WCHAR a, WCHAR b, int caseSensitive)
 112 {
 113   return caseSensitive ? (a == b) : (toupperW(a) == toupperW(b));
 114 }
 115
 116 /* note: those two really return the first matching offset (starting from EOS)+1
 117  * in other words, an offset of the first trailing white/black */
 118 int ME_ReverseFindNonWhitespaceV(const ME_String *s, int nVChar);
 119 int ME_ReverseFindWhitespaceV(const ME_String *s, int nVChar);
 120
 121 /* row.c */
 122 ME_DisplayItem *ME_RowStart(ME_DisplayItem *item);
 123 /* ME_DisplayItem *ME_RowEnd(ME_DisplayItem *item); */
 124 ME_DisplayItem *ME_FindRowWithNumber(ME_TextEditor *editor, int nRow);
 125 int ME_RowNumberFromCharOfs(ME_TextEditor *editor, int nOfs);
 126
 127 /* run.c */
 128 ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags);
 129 ME_DisplayItem *ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor,
 130                                      ME_Style *style, const WCHAR *str, int len, int flags);
 131 void ME_CheckCharOffsets(ME_TextEditor *editor);
 132 void ME_PropagateCharOffset(ME_DisplayItem *p, int shift);
 133 int ME_CharFromPoint(ME_Context *c, int cx, ME_Run *run);
 134 /* this one accounts for 1/2 char tolerance */
 135 int ME_CharFromPointCursor(ME_TextEditor *editor, int cx, ME_Run *run);
 136 int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset);
 137 int ME_CanJoinRuns(const ME_Run *run1, const ME_Run *run2);
 138 void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p);
 139 ME_DisplayItem *ME_SplitRun(ME_WrapContext *wc, ME_DisplayItem *item, int nChar);
 140 ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_DisplayItem *item, int nChar);
 141 void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run);
 142 void ME_CalcRunExtent(ME_Context *c, const ME_Paragraph *para, int startx, ME_Run *run);
 143 SIZE ME_GetRunSize(ME_Context *c, const ME_Paragraph *para, ME_Run *run, int nLen, int startx);
 144 void ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor);
 145 void ME_RunOfsFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem **ppPara, ME_DisplayItem **ppRun, int *pOfs);
 146 int ME_CharOfsFromRunOfs(ME_TextEditor *editor, const ME_DisplayItem *pPara, const ME_DisplayItem *pRun, int nOfs);
 147 void ME_SkipAndPropagateCharOffset(ME_DisplayItem *p, int shift);
 148 void ME_SetCharFormat(ME_TextEditor *editor, ME_Cursor *start, ME_Cursor *end, CHARFORMAT2W *pFmt);
 149 void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt);
 150 void ME_GetCharFormat(ME_TextEditor *editor, const ME_Cursor *from,
 151                       const ME_Cursor *to, CHARFORMAT2W *pFmt);
 152 void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt);
 153 void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt);
 154 void ME_SetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *mod);
 155
 156 /* caret.c */
 157 void ME_SetCursorToStart(ME_TextEditor *editor, ME_Cursor *cursor);
 158 int ME_SetSelection(ME_TextEditor *editor, int from, int to);
 159 void ME_HideCaret(ME_TextEditor *ed);
 160 void ME_ShowCaret(ME_TextEditor *ed);
 161 void ME_MoveCaret(ME_TextEditor *ed);
 162 BOOL ME_CharFromPos(ME_TextEditor *editor, int x, int y, ME_Cursor *cursor, BOOL *isExact);
 163 void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum);
 164 void ME_MouseMove(ME_TextEditor *editor, int x, int y);
 165 BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars);
 166 void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
 167                              const WCHAR *str, int len, ME_Style *style);
 168 void ME_InsertEndRowFromCursor(ME_TextEditor *editor, int nCursor);
 169 int ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs);
 170 BOOL ME_ArrowKey(ME_TextEditor *ed, int nVKey, BOOL extend, BOOL ctrl);
 171
 172 int ME_GetCursorOfs(const ME_Cursor *cursor);
 173 int ME_GetSelectionOfs(ME_TextEditor *editor, int *from, int *to);
 174 int ME_GetSelection(ME_TextEditor *editor, ME_Cursor **from, ME_Cursor **to);
 175 BOOL ME_IsSelection(ME_TextEditor *editor);
 176 void ME_DeleteSelection(ME_TextEditor *editor);
 177 void ME_SendSelChange(ME_TextEditor *editor);
 178 void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor);
 179 BOOL ME_InternalDeleteText(ME_TextEditor *editor, ME_Cursor *start, int nChars, BOOL bForce);
 180 int ME_GetTextLength(ME_TextEditor *editor);
 181 int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how);
 182 ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor);
 183
 184 /* context.c */
 185 void ME_InitContext(ME_Context *c, ME_TextEditor *editor, HDC hDC);
 186 void ME_DestroyContext(ME_Context *c);
 187
 188 /* wrap.c */
 189 BOOL ME_WrapMarkedParagraphs(ME_TextEditor *editor);
 190 void ME_InvalidateMarkedParagraphs(ME_TextEditor *editor);
 191 void ME_SendRequestResize(ME_TextEditor *editor, BOOL force);
 192
 193 /* para.c */
 194 ME_DisplayItem *ME_GetParagraph(ME_DisplayItem *run);
 195 void ME_GetSelectionParas(ME_TextEditor *editor, ME_DisplayItem **para, ME_DisplayItem **para_end);
 196 void ME_MakeFirstParagraph(ME_TextEditor *editor);
 197 ME_DisplayItem *ME_SplitParagraph(ME_TextEditor *editor, ME_DisplayItem *rp, ME_Style *style, ME_String *eol_str, int paraFlags);
 198 ME_DisplayItem *ME_JoinParagraphs(ME_TextEditor *editor, ME_DisplayItem *tp,
 199                                   BOOL keepFirstParaFormat);
 200 void ME_DumpParaStyle(ME_Paragraph *s);
 201 void ME_DumpParaStyleToBuf(const PARAFORMAT2 *pFmt, char buf[2048]);
 202 BOOL ME_SetSelectionParaFormat(ME_TextEditor *editor, const PARAFORMAT2 *pFmt);
 203 void ME_GetSelectionParaFormat(ME_TextEditor *editor, PARAFORMAT2 *pFmt);
 204 /* marks from first up to (but not including) last */
 205 void ME_MarkForPainting(ME_TextEditor *editor, ME_DisplayItem *first, const ME_DisplayItem *last);
 206 void ME_MarkAllForWrapping(ME_TextEditor *editor);
 207 void ME_SetDefaultParaFormat(PARAFORMAT2 *pFmt);
 208
 209 /* paint.c */
 210 void ME_PaintContent(ME_TextEditor *editor, HDC hDC, BOOL bOnlyNew, const RECT *rcUpdate);
 211 void ME_Repaint(ME_TextEditor *editor);
 212 void ME_RewrapRepaint(ME_TextEditor *editor);
 213 void ME_UpdateRepaint(ME_TextEditor *editor);
 214 void ME_EnsureVisible(ME_TextEditor *editor, ME_Cursor *pCursor);
 215 void ME_InvalidateSelection(ME_TextEditor *editor);
 216 BOOL ME_SetZoom(ME_TextEditor *editor, int numerator, int denominator);
 217 int  ME_twips2pointsX(ME_Context *c, int x);
 218 int  ME_twips2pointsY(ME_Context *c, int y);
 219
 220 /* scroll functions in paint.c */
 221
 222 void ME_ScrollAbs(ME_TextEditor *editor, int x, int y);
 223 void ME_HScrollAbs(ME_TextEditor *editor, int x);
 224 void ME_VScrollAbs(ME_TextEditor *editor, int y);
 225 void ME_ScrollUp(ME_TextEditor *editor, int cy);
 226 void ME_ScrollDown(ME_TextEditor *editor, int cy);
 227 void ME_ScrollLeft(ME_TextEditor *editor, int cx);
 228 void ME_ScrollRight(ME_TextEditor *editor, int cx);
 229 void ME_UpdateScrollBar(ME_TextEditor *editor);
 230
 231 /* other functions in paint.c */
 232 int  ME_GetParaBorderWidth(ME_TextEditor *editor, int);
 233 int  ME_GetParaLineSpace(ME_Context *c, ME_Paragraph*);
 234
 235 /* richole.c */
 236 LRESULT CreateIRichEditOle(ME_TextEditor *editor, LPVOID *);
 237 void ME_DrawOLE(ME_Context *c, int x, int y, ME_Run* run, ME_Paragraph *para, BOOL selected);
 238 void ME_GetOLEObjectSize(ME_Context *c, ME_Run *run, SIZE *pSize);
 239 void ME_CopyReObject(REOBJECT* dst, const REOBJECT* src);
 240 void ME_DeleteReObject(REOBJECT* reo);
 241
 242 /* editor.c */
 243 ME_TextEditor *ME_MakeEditor(ITextHost *texthost, BOOL bEmulateVersion10);
 244 LRESULT ME_HandleMessage(ME_TextEditor *editor, UINT msg, WPARAM wParam,
 245                          LPARAM lParam, BOOL unicode, HRESULT* phresult);
 246 void ME_SendOldNotify(ME_TextEditor *editor, int nCode);
 247 int ME_GetTextW(ME_TextEditor *editor, WCHAR *buffer, int buflen,
 248                 const ME_Cursor *start, int srcChars, BOOL bCRLF);
 249 void ME_RTFCharAttrHook(struct _RTF_Info *info);
 250 void ME_RTFParAttrHook(struct _RTF_Info *info);
 251 void ME_RTFTblAttrHook(struct _RTF_Info *info);
 252 void ME_RTFSpecialCharHook(struct _RTF_Info *info);
 253 void ME_StreamInFill(ME_InStream *stream);
 254 extern int me_debug;
 255
 256 /* table.c */
 257 BOOL ME_IsInTable(ME_DisplayItem *pItem);
 258 ME_DisplayItem *ME_InsertTableRowStartFromCursor(ME_TextEditor *editor);
 259 ME_DisplayItem *ME_InsertTableRowStartAtParagraph(ME_TextEditor *editor,
 260                                                   ME_DisplayItem *para);
 261 ME_DisplayItem *ME_InsertTableCellFromCursor(ME_TextEditor *editor);
 262 ME_DisplayItem *ME_InsertTableRowEndFromCursor(ME_TextEditor *editor);
 263 ME_DisplayItem *ME_GetTableRowEnd(ME_DisplayItem *para);
 264 ME_DisplayItem *ME_GetTableRowStart(ME_DisplayItem *para);
 265 void ME_CheckTablesForCorruption(ME_TextEditor *editor);
 266 void ME_ProtectPartialTableDeletion(ME_TextEditor *editor, ME_Cursor *c, int *nChars);
 267 ME_DisplayItem* ME_AppendTableRow(ME_TextEditor *editor, ME_DisplayItem *table_row);
 268 void ME_TabPressedInTable(ME_TextEditor *editor, BOOL bSelectedRow);
 269 void ME_MoveCursorFromTableRowStartParagraph(ME_TextEditor *editor);
 270 struct RTFTable *ME_MakeTableDef(ME_TextEditor *editor);
 271 void ME_InitTableDef(ME_TextEditor *editor, struct RTFTable *tableDef);
 272
 273 /* txthost.c */
 274 ITextHost *ME_CreateTextHost(HWND hwnd, CREATESTRUCTW *cs, BOOL bEmulateVersion10);
 275 #ifdef __i386__ /* Use wrappers to perform thiscall on i386 */
 276 #define TXTHOST_VTABLE(This) (&itextHostStdcallVtbl)
 277 #else /* __i386__ */
 278 #define TXTHOST_VTABLE(This) (This)->lpVtbl
 279 #endif /* __i386__ */
 280  /*** ITextHost methods ***/
 281 #define ITextHost_TxGetDC(This) TXTHOST_VTABLE(This)->TxGetDC(This)
 282 #define ITextHost_TxReleaseDC(This,a) TXTHOST_VTABLE(This)->TxReleaseDC(This,a)
 283 #define ITextHost_TxShowScrollBar(This,a,b) TXTHOST_VTABLE(This)->TxShowScrollBar(This,a,b)
 284 #define ITextHost_TxEnableScrollBar(This,a,b) TXTHOST_VTABLE(This)->TxEnableScrollBar(This,a,b)
 285 #define ITextHost_TxSetScrollRange(This,a,b,c,d) TXTHOST_VTABLE(This)->TxSetScrollRange(This,a,b,c,d)
 286 #define ITextHost_TxSetScrollPos(This,a,b,c) TXTHOST_VTABLE(This)->TxSetScrollPos(This,a,b,c)
 287 #define ITextHost_TxInvalidateRect(This,a,b) TXTHOST_VTABLE(This)->TxInvalidateRect(This,a,b)
 288 #define ITextHost_TxViewChange(This,a) TXTHOST_VTABLE(This)->TxViewChange(This,a)
 289 #define ITextHost_TxCreateCaret(This,a,b,c) TXTHOST_VTABLE(This)->TxCreateCaret(This,a,b,c)
 290 #define ITextHost_TxShowCaret(This,a) TXTHOST_VTABLE(This)->TxShowCaret(This,a)
 291 #define ITextHost_TxSetCaretPos(This,a,b) TXTHOST_VTABLE(This)->TxSetCaretPos(This,a,b)
 292 #define ITextHost_TxSetTimer(This,a,b) TXTHOST_VTABLE(This)->TxSetTimer(This,a,b)
 293 #define ITextHost_TxKillTimer(This,a) TXTHOST_VTABLE(This)->TxKillTimer(This,a)
 294 #define ITextHost_TxScrollWindowEx(This,a,b,c,d,e,f,g) TXTHOST_VTABLE(This)->TxScrollWindowEx(This,a,b,c,d,e,f,g)
 295 #define ITextHost_TxSetCapture(This,a) TXTHOST_VTABLE(This)->TxSetCapture(This,a)
 296 #define ITextHost_TxSetFocus(This) TXTHOST_VTABLE(This)->TxSetFocus(This)
 297 #define ITextHost_TxSetCursor(This,a,b) TXTHOST_VTABLE(This)->TxSetCursor(This,a,b)
 298 #define ITextHost_TxScreenToClient(This,a) TXTHOST_VTABLE(This)->TxScreenToClient(This,a)
 299 #define ITextHost_TxClientToScreen(This,a) TXTHOST_VTABLE(This)->TxClientToScreen(This,a)
 300 #define ITextHost_TxActivate(This,a) TXTHOST_VTABLE(This)->TxActivate(This,a)
 301 #define ITextHost_TxDeactivate(This,a) TXTHOST_VTABLE(This)->TxDeactivate(This,a)
 302 #define ITextHost_TxGetClientRect(This,a) TXTHOST_VTABLE(This)->TxGetClientRect(This,a)
 303 #define ITextHost_TxGetViewInset(This,a) TXTHOST_VTABLE(This)->TxGetViewInset(This,a)
 304 #define ITextHost_TxGetCharFormat(This,a) TXTHOST_VTABLE(This)->TxGetCharFormat(This,a)
 305 #define ITextHost_TxGetParaFormat(This,a) TXTHOST_VTABLE(This)->TxGetParaFormat(This,a)
 306 #define ITextHost_TxGetSysColor(This,a) TXTHOST_VTABLE(This)->TxGetSysColor(This,a)
 307 #define ITextHost_TxGetBackStyle(This,a) TXTHOST_VTABLE(This)->TxGetBackStyle(This,a)
 308 #define ITextHost_TxGetMaxLength(This,a) TXTHOST_VTABLE(This)->TxGetMaxLength(This,a)
 309 #define ITextHost_TxGetScrollBars(This,a) TXTHOST_VTABLE(This)->TxGetScrollBars(This,a)
 310 #define ITextHost_TxGetPasswordChar(This,a) TXTHOST_VTABLE(This)->TxGetPasswordChar(This,a)
 311 #define ITextHost_TxGetAcceleratorPos(This,a) TXTHOST_VTABLE(This)->TxGetAcceleratorPos(This,a)
 312 #define ITextHost_TxGetExtent(This,a) TXTHOST_VTABLE(This)->TxGetExtent(This,a)
 313 #define ITextHost_OnTxCharFormatChange(This,a) TXTHOST_VTABLE(This)->OnTxCharFormatChange(This,a)
 314 #define ITextHost_OnTxParaFormatChange(This,a) TXTHOST_VTABLE(This)->OnTxParaFormatChange(This,a)
 315 #define ITextHost_TxGetPropertyBits(This,a,b) TXTHOST_VTABLE(This)->TxGetPropertyBits(This,a,b)
 316 #define ITextHost_TxNotify(This,a,b) TXTHOST_VTABLE(This)->TxNotify(This,a,b)
 317 #define ITextHost_TxImmGetContext(This) TXTHOST_VTABLE(This)->TxImmGetContext(This)
 318 #define ITextHost_TxImmReleaseContext(This,a) TXTHOST_VTABLE(This)->TxImmReleaseContext(This,a)
 319 #define ITextHost_TxGetSelectionBarWidth(This,a) TXTHOST_VTABLE(This)->TxGetSelectionBarWidth(This,a)
 320
 321 /* undo.c */
 322 ME_UndoItem *ME_AddUndoItem(ME_TextEditor *editor, ME_DIType type, const ME_DisplayItem *pdi);
 323 void ME_CommitUndo(ME_TextEditor *editor);
 324 void ME_ContinueCoalescingTransaction(ME_TextEditor *editor);
 325 void ME_CommitCoalescingUndo(ME_TextEditor *editor);
 326 BOOL ME_Undo(ME_TextEditor *editor);
 327 BOOL ME_Redo(ME_TextEditor *editor);
 328 void ME_EmptyUndoStack(ME_TextEditor *editor);
 329
 330 /* writer.c */
 331 LRESULT ME_StreamOutRange(ME_TextEditor *editor, DWORD dwFormat, const ME_Cursor *start, int nChars, EDITSTREAM *stream);
 332 LRESULT ME_StreamOut(ME_TextEditor *editor, DWORD dwFormat, EDITSTREAM *stream);
 333
 334 /* clipboard.c */
 335 HRESULT ME_GetDataObject(ME_TextEditor *editor, const ME_Cursor *start, int nChars, LPDATAOBJECT *lplpdataobj);