objects/text.c

   1 /*
   2  * text functions
   3  *
   4  * Copyright 1993, 1994 Alexandre Julliard
   5  */
   6
   7 static char Copyright[] = "Copyright  Alexandre Julliard, 1993, 1994";
   8
   9 #include <stdlib.h>
  10 #include <X11/Xatom.h>
  11 #include "windows.h"
  12 #include "gdi.h"
  13 #include "metafile.h"
  14 #include "stddebug.h"
  15 /* #define DEBUG_TEXT /* */
  16 /* #undef  DEBUG_TEXT /* */
  17 #include "debug.h"
  18
  19 #define TAB     9
  20 #define LF     10
  21 #define CR     13
  22 #define SPACE  32
  23 #define PREFIX 38
  24
  25 #define SWAP_INT(a,b)  { int t = a; a = b; b = t; }
  26
  27 static int tabstop = 8;
  28 static int tabwidth;
  29 static int spacewidth;
  30 static int prefix_offset;
  31
  32
  33 static char *TEXT_NextLine(HDC hdc, char *str, int *count, char *dest,
  34                            int *len, int width, WORD format)
  35 {
  36     /* Return next line of text from a string.
  37      *
  38      * hdc - handle to DC.
  39      * str - string to parse into lines.
  40      * count - length of str.
  41      * dest - destination in which to return line.
  42      * len - length of resultant line in dest in chars.
  43      * width - maximum width of line in pixels.
  44      * format - format type passed to DrawText.
  45      *
  46      * Returns pointer to next char in str after end of the line
  47      * or NULL if end of str reached.
  48      */
  49
  50     int i = 0, j = 0, k;
  51     int plen = 0;
  52     int numspaces;
  53     SIZE size;
  54     int lasttab = 0;
  55     int wb_i = 0, wb_j = 0, wb_count;
  56
  57     while (*count)
  58     {
  59         switch (str[i])
  60         {
  61         case CR:
  62         case LF:
  63             if (!(format & DT_SINGLELINE))
  64             {
  65                 i++;
  66                 if (str[i] == CR || str[i] == LF)
  67                     i++;
  68                 *len = j;
  69                 return (&str[i]);
  70             }
  71             dest[j++] = str[i++];
  72             if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
  73                 (format & DT_WORDBREAK))
  74             {
  75                 if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
  76                     return NULL;
  77                 plen += size.cx;
  78             }
  79             break;
  80
  81         case PREFIX:
  82             if (!(format & DT_NOPREFIX))
  83             {
  84                 prefix_offset = j;
  85                 i++;
  86             }
  87             else
  88             {
  89                 dest[j++] = str[i++];
  90                 if (!(format & DT_NOCLIP) || (format & DT_WORDBREAK))
  91                 {
  92                     if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
  93                         return NULL;
  94                     plen += size.cx;
  95                 }
  96             }
  97             break;
  98
  99         case TAB:
 100             if (format & DT_EXPANDTABS)
 101             {
 102                 wb_i = ++i;
 103                 wb_j = j;
 104                 wb_count = *count;
 105
 106                 if (!GetTextExtentPoint(hdc, &dest[lasttab], j - lasttab,
 107                                                                  &size))
 108                     return NULL;
 109
 110                 numspaces = (tabwidth - size.cx) / spacewidth;
 111                 for (k = 0; k < numspaces; k++)
 112                     dest[j++] = SPACE;
 113                 plen += tabwidth - size.cx;
 114                 lasttab = wb_j + numspaces;
 115             }
 116             else
 117             {
 118                 dest[j++] = str[i++];
 119                 if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
 120                     (format & DT_WORDBREAK))
 121                 {
 122                     if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
 123                         return NULL;
 124                     plen += size.cx;
 125                 }
 126             }
 127             break;
 128
 129         case SPACE:
 130             dest[j++] = str[i++];
 131             if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
 132                 (format & DT_WORDBREAK))
 133             {
 134                 wb_i = i;
 135                 wb_j = j - 1;
 136                 wb_count = *count;
 137                 if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
 138                     return NULL;
 139                 plen += size.cx;
 140             }
 141             break;
 142
 143         default:
 144             dest[j++] = str[i++];
 145             if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
 146                 (format & DT_WORDBREAK))
 147             {
 148                 if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
 149                     return NULL;
 150                 plen += size.cx;
 151             }
 152         }
 153
 154         (*count)--;
 155         if (!(format & DT_NOCLIP) || (format & DT_WORDBREAK))
 156         {
 157             if (plen > width)
 158             {
 159                 if (format & DT_WORDBREAK)
 160                 {
 161                     *len = wb_j;
 162                     *count = wb_count - 1;
 163                     return (&str[wb_i]);
 164                 }
 165                 else
 166                 {
 167                     *len = j;
 168                     return (&str[i]);
 169                 }
 170             }
 171         }
 172     }
 173
 174     *len = j;
 175     return NULL;
 176 }
 177
 178
 179 /***********************************************************************
 180  *           DrawText    (USER.85)
 181  */
 182 int DrawText( HDC hdc, LPSTR str, int count, LPRECT rect, WORD flags )
 183 {
 184     SIZE size;
 185     char *strPtr;
 186     static char line[1024];
 187     int len, lh, prefix_x, prefix_end;
 188     TEXTMETRIC tm;
 189     int x = rect->left, y = rect->top;
 190     int width = rect->right - rect->left;
 191
 192     dprintf_text(stddeb,"DrawText: '%s', %d , [(%d,%d),(%d,%d)]\n", str, count,
 193            rect->left, rect->top, rect->right, rect->bottom);
 194
 195     if (count == -1) count = strlen(str);
 196     strPtr = str;
 197
 198     GetTextMetrics(hdc, &tm);
 199     if (flags & DT_EXTERNALLEADING)
 200         lh = tm.tmHeight + tm.tmExternalLeading;
 201     else
 202         lh = tm.tmHeight;
 203
 204     if (flags & DT_TABSTOP)
 205         tabstop = flags >> 8;
 206
 207     if (flags & DT_EXPANDTABS)
 208     {
 209         GetTextExtentPoint(hdc, " ", 1, &size);
 210         spacewidth = size.cx;
 211         GetTextExtentPoint(hdc, "o", 1, &size);
 212         tabwidth = size.cx * tabstop;
 213     }
 214
 215     do
 216     {
 217         prefix_offset = -1;
 218         strPtr = TEXT_NextLine(hdc, strPtr, &count, line, &len, width, flags);
 219
 220         if (prefix_offset != -1)
 221         {
 222             GetTextExtentPoint(hdc, line, prefix_offset, &size);
 223             prefix_x = size.cx;
 224             GetTextExtentPoint(hdc, line, prefix_offset + 1, &size);
 225             prefix_end = size.cx - 1;
 226         }
 227
 228         if (!GetTextExtentPoint(hdc, line, len, &size)) return 0;
 229         if (flags & DT_CENTER) x = (rect->left + rect->right -
 230                                     size.cx) / 2;
 231         else if (flags & DT_RIGHT) x = rect->right - size.cx;
 232
 233         if (flags & DT_SINGLELINE)
 234         {
 235             if (flags & DT_VCENTER) y = rect->top +
 236                 (rect->bottom - rect->top) / 2 - size.cy / 2;
 237             else if (flags & DT_BOTTOM) y = rect->bottom - size.cy;
 238         }
 239         if (!(flags & DT_CALCRECT))
 240             if (!ExtTextOut( hdc, x, y, (flags & DT_NOCLIP) ? 0 : ETO_CLIPPED,
 241                              rect, line, len, NULL )) return 0;
 242
 243         if (prefix_offset != -1)
 244         {
 245             HPEN hpen = CreatePen( PS_SOLID, 1, GetTextColor(hdc) );
 246             HPEN oldPen = SelectObject( hdc, hpen );
 247             MoveTo(hdc, x + prefix_x, y + tm.tmAscent + 1 );
 248             LineTo(hdc, x + prefix_end, y + tm.tmAscent + 1 );
 249             SelectObject( hdc, oldPen );
 250             DeleteObject( hpen );
 251         }
 252
 253         if (strPtr)
 254         {
 255             y += lh;
 256             if (!(flags & DT_NOCLIP))
 257             {
 258                 if (y > rect->bottom - lh)
 259                     break;
 260             }
 261         }
 262     }
 263     while (strPtr);
 264     if (flags & DT_CALCRECT) rect->bottom = y;
 265     return 1;
 266 }
 267
 268
 269 /***********************************************************************
 270  *           ExtTextOut    (GDI.351)
 271  */
 272 BOOL ExtTextOut( HDC hdc, short x, short y, WORD flags, LPRECT lprect,
 273                  LPSTR str, WORD count, LPINT lpDx )
 274 {
 275     int dir, ascent, descent, i;
 276     XCharStruct info;
 277     XFontStruct *font;
 278     RECT rect;
 279
 280     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 281     if (!dc)
 282     {
 283         dc = (DC *)GDI_GetObjPtr( hdc, METAFILE_DC_MAGIC );
 284         if (!dc) return FALSE;
 285         MF_TextOut( dc, x, y, str, count );
 286         return TRUE;
 287     }
 288
 289     if (!DC_SetupGCForText( dc )) return TRUE;
 290     font = dc->u.x.font.fstruct;
 291
 292     dprintf_text(stddeb,"ExtTextOut: %d,%d '%s', %d  flags=%d rect=%d,%d,%d,%d\n",
 293             x, y, str, count, flags,
 294             lprect->left, lprect->top, lprect->right, lprect->bottom );
 295
 296       /* Setup coordinates */
 297
 298     if (dc->w.textAlign & TA_UPDATECP)
 299     {
 300         x = dc->w.CursPosX;
 301         y = dc->w.CursPosY;
 302     }
 303     x = XLPTODP( dc, x );
 304     y = YLPTODP( dc, y );
 305     if (flags & (ETO_OPAQUE | ETO_CLIPPED))  /* There's a rectangle */
 306     {
 307         rect.left   = XLPTODP( dc, lprect->left );
 308         rect.right  = XLPTODP( dc, lprect->right );
 309         rect.top    = YLPTODP( dc, lprect->top );
 310         rect.bottom = YLPTODP( dc, lprect->bottom );
 311         if (rect.right < rect.left) SWAP_INT( rect.left, rect.right );
 312         if (rect.bottom < rect.top) SWAP_INT( rect.top, rect.bottom );
 313     }
 314
 315       /* Draw the rectangle */
 316
 317     if (flags & ETO_OPAQUE)
 318     {
 319         XSetForeground( display, dc->u.x.gc, dc->w.backgroundPixel );
 320         XFillRectangle( display, dc->u.x.drawable, dc->u.x.gc,
 321                         dc->w.DCOrgX + rect.left, dc->w.DCOrgY + rect.top,
 322                         rect.right-rect.left, rect.bottom-rect.top );
 323     }
 324     if (!count) return TRUE;  /* Nothing more to do */
 325
 326       /* Compute text starting position */
 327
 328     XTextExtents( font, str, count, &dir, &ascent, &descent, &info );
 329     info.width += count*dc->w.charExtra + dc->w.breakExtra*dc->w.breakCount;
 330     if (lpDx) for (i = 0; i < count; i++) info.width += lpDx[i];
 331
 332     switch( dc->w.textAlign & (TA_LEFT | TA_RIGHT | TA_CENTER) )
 333     {
 334       case TA_LEFT:
 335           if (dc->w.textAlign & TA_UPDATECP)
 336               dc->w.CursPosX = XDPTOLP( dc, x + info.width );
 337           break;
 338       case TA_RIGHT:
 339           x -= info.width;
 340           if (dc->w.textAlign & TA_UPDATECP) dc->w.CursPosX = XDPTOLP( dc, x );
 341           break;
 342       case TA_CENTER:
 343           x -= info.width / 2;
 344           break;
 345     }
 346     switch( dc->w.textAlign & (TA_TOP | TA_BOTTOM | TA_BASELINE) )
 347     {
 348       case TA_TOP:
 349           y += font->ascent;
 350           break;
 351       case TA_BOTTOM:
 352           y -= font->descent;
 353           break;
 354       case TA_BASELINE:
 355           break;
 356     }
 357
 358       /* Set the clip region */
 359
 360     if (flags & ETO_CLIPPED)
 361     {
 362         SaveVisRgn( hdc );
 363         IntersectVisRect( hdc, rect.left, rect.top, rect.right, rect.bottom );
 364     }
 365
 366       /* Draw the text background if necessary */
 367
 368     if (dc->w.backgroundMode != TRANSPARENT)
 369     {
 370           /* If rectangle is opaque and clipped, do nothing */
 371         if (!(flags & ETO_CLIPPED) || !(flags & ETO_OPAQUE))
 372         {
 373               /* Only draw if rectangle is not opaque or if some */
 374               /* text is outside the rectangle */
 375             if (!(flags & ETO_OPAQUE) ||
 376                 (x < rect.left) ||
 377                 (x + info.width >= rect.right) ||
 378                 (y-font->ascent < rect.top) ||
 379                 (y+font->descent >= rect.bottom))
 380             {
 381                 XSetForeground( display, dc->u.x.gc, dc->w.backgroundPixel );
 382                 XFillRectangle( display, dc->u.x.drawable, dc->u.x.gc,
 383                                 dc->w.DCOrgX + x,
 384                                 dc->w.DCOrgY + y - font->ascent,
 385                                 info.width,
 386                                 font->ascent + font->descent );
 387             }
 388         }
 389     }
 390
 391       /* Draw the text */
 392
 393     XSetForeground( display, dc->u.x.gc, dc->w.textPixel );
 394     if (!dc->w.charExtra && !dc->w.breakExtra && !lpDx)
 395     {
 396         XDrawString( display, dc->u.x.drawable, dc->u.x.gc,
 397                      dc->w.DCOrgX + x, dc->w.DCOrgY + y, str, count );
 398     }
 399     else  /* Now the fun begins... */
 400     {
 401         XTextItem *items, *pitem;
 402
 403         items = malloc( count * sizeof(XTextItem) );
 404         for (i = 0, pitem = items; i < count; i++, pitem++)
 405         {
 406             pitem->chars  = str + i;
 407             pitem->nchars = 1;
 408             pitem->font   = None;
 409             if (i == 0)
 410             {
 411                 pitem->delta = 0;
 412                 continue;  /* First iteration -> no delta */
 413             }
 414             pitem->delta = dc->w.charExtra;
 415             if (str[i] == dc->u.x.font.metrics.tmBreakChar)
 416                 pitem->delta += dc->w.breakExtra;
 417             if (lpDx)
 418             {
 419                 INT width;
 420                 GetCharWidth( hdc, str[i], str[i], &width );
 421                 pitem->delta += lpDx[i-1] - width;
 422             }
 423         }
 424         XDrawText( display, dc->u.x.drawable, dc->u.x.gc,
 425                    dc->w.DCOrgX + x, dc->w.DCOrgY + y, items, count );
 426         free( items );
 427     }
 428
 429       /* Draw underline and strike-out if needed */
 430
 431     if (dc->u.x.font.metrics.tmUnderlined)
 432     {
 433         long linePos, lineWidth;
 434         if (!XGetFontProperty( font, XA_UNDERLINE_POSITION, &linePos ))
 435             linePos = font->descent-1;
 436         if (!XGetFontProperty( font, XA_UNDERLINE_THICKNESS, &lineWidth ))
 437             lineWidth = 0;
 438         else if (lineWidth == 1) lineWidth = 0;
 439         XSetLineAttributes( display, dc->u.x.gc, lineWidth,
 440                             LineSolid, CapRound, JoinBevel );
 441         XDrawLine( display, dc->u.x.drawable, dc->u.x.gc,
 442                    dc->w.DCOrgX + x, dc->w.DCOrgY + y + linePos,
 443                    dc->w.DCOrgX + x + info.width, dc->w.DCOrgY + y + linePos );
 444     }
 445     if (dc->u.x.font.metrics.tmStruckOut)
 446     {
 447         long lineAscent, lineDescent;
 448         if (!XGetFontProperty( font, XA_STRIKEOUT_ASCENT, &lineAscent ))
 449             lineAscent = font->ascent / 3;
 450         if (!XGetFontProperty( font, XA_STRIKEOUT_DESCENT, &lineDescent ))
 451             lineDescent = -lineAscent;
 452         XSetLineAttributes( display, dc->u.x.gc, lineAscent + lineDescent,
 453                             LineSolid, CapRound, JoinBevel );
 454         XDrawLine( display, dc->u.x.drawable, dc->u.x.gc,
 455                    dc->w.DCOrgX + x, dc->w.DCOrgY + y - lineAscent,
 456                    dc->w.DCOrgX + x + info.width, dc->w.DCOrgY + y - lineAscent );
 457     }
 458     if (flags & ETO_CLIPPED) RestoreVisRgn( hdc );
 459     return TRUE;
 460 }
 461
 462
 463 /***********************************************************************
 464  *           TextOut    (GDI.33)
 465  */
 466 BOOL TextOut( HDC hdc, short x, short y, LPSTR str, short count )
 467 {
 468     return ExtTextOut( hdc, x, y, 0, NULL, str, count, NULL );
 469 }
 470
 471
 472 /***********************************************************************
 473  *              GrayString (USER.185)
 474  */
 475 BOOL GrayString(HDC hdc, HBRUSH hbr, FARPROC gsprc, LPARAM lParam,
 476                 INT cch, INT x, INT y, INT cx, INT cy)
 477 {
 478         int s, current_color;
 479
 480         if (gsprc) {
 481                 return CallGrayStringProc(gsprc, hdc, lParam,
 482                                         cch ? cch : lstrlen((LPCSTR) lParam) );
 483         } else {
 484                 current_color = GetTextColor(hdc);
 485                 SetTextColor(hdc, GetSysColor(COLOR_GRAYTEXT) );
 486                 s = TextOut(hdc, x, y, (LPSTR) lParam,
 487                                 cch ? cch : lstrlen((LPCSTR) lParam) );
 488                 SetTextColor(hdc, current_color);
 489
 490                 return s;
 491         }
 492 }
 493
 494
 495 /***********************************************************************
 496  *                      TabbedTextOut           [USER.196]
 497  */
 498 LONG TabbedTextOut(HDC hDC, short x, short y, LPSTR lpStr, short nCount,
 499                 short nTabCount, LPINT lpTabPos, short nTabOrg)
 500 {
 501         WORD    width, height;
 502         dprintf_text(stdnimp,"EMPTY STUB !!! TabbedTextOut(); ! call TextOut() for now !\n");
 503         height = HIWORD(GetTextExtent(hDC, lpStr, nCount));
 504         width = LOWORD(GetTextExtent(hDC, lpStr, nCount));
 505         TextOut(hDC, x, y, lpStr, nCount);
 506         return MAKELONG(width, height);
 507 }
 508
 509
 510 /***********************************************************************
 511  *                      GetTabbedTextExtent             [USER.197]
 512  */
 513 DWORD GetTabbedTextExtent(HDC hDC, LPSTR lpString, int nCount,
 514         int nTabPositions, LPINT lpnTabStopPositions)
 515 {
 516         dprintf_text(stdnimp,"EMPTY STUB !!! GetTabbedTextExtent(); !\n");
 517
 518         return (18 << 16) | (nCount * 18);
 519 }
 520
 521