objects/text.c

   1 /*
   2  * text functions
   3  *
   4  * Copyright 1993, 1994 Alexandre Julliard
   5  *
   6 static char Copyright[] = "Copyright  Alexandre Julliard, 1993, 1994";
   7 */
   8 #include <stdlib.h>
   9 #include <X11/Xatom.h>
  10 #include "windows.h"
  11 #include "dc.h"
  12 #include "gdi.h"
  13 #include "callback.h"
  14 #include "metafile.h"
  15 #include "stddebug.h"
  16 /* #define 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 = 0;
  56
  57     while (*count)
  58     {
  59         switch (str[i])
  60         {
  61         case CR:
  62         case LF:
  63             if (!(format & DT_SINGLELINE))
  64             {
  65                 if (str[i] == CR && str[i+1] == LF)
  66                     i++;
  67                 i++;
  68                 *len = j;
  69                 (*count)--;
  70                 return (&str[i]);
  71             }
  72             dest[j++] = str[i++];
  73             if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
  74                 (format & DT_WORDBREAK))
  75             {
  76                 if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
  77                     return NULL;
  78                 plen += size.cx;
  79             }
  80             break;
  81
  82         case PREFIX:
  83             if (!(format & DT_NOPREFIX))
  84             {
  85                 prefix_offset = j;
  86                 i++;
  87             }
  88             else
  89             {
  90                 dest[j++] = str[i++];
  91                 if (!(format & DT_NOCLIP) || (format & DT_WORDBREAK))
  92                 {
  93                     if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
  94                         return NULL;
  95                     plen += size.cx;
  96                 }
  97             }
  98             break;
  99
 100         case TAB:
 101             if (format & DT_EXPANDTABS)
 102             {
 103                 wb_i = ++i;
 104                 wb_j = j;
 105                 wb_count = *count;
 106
 107                 if (!GetTextExtentPoint(hdc, &dest[lasttab], j - lasttab,
 108                                                                  &size))
 109                     return NULL;
 110
 111                 numspaces = (tabwidth - size.cx) / spacewidth;
 112                 for (k = 0; k < numspaces; k++)
 113                     dest[j++] = SPACE;
 114                 plen += tabwidth - size.cx;
 115                 lasttab = wb_j + numspaces;
 116             }
 117             else
 118             {
 119                 dest[j++] = str[i++];
 120                 if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
 121                     (format & DT_WORDBREAK))
 122                 {
 123                     if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
 124                         return NULL;
 125                     plen += size.cx;
 126                 }
 127             }
 128             break;
 129
 130         case SPACE:
 131             dest[j++] = str[i++];
 132             if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
 133                 (format & DT_WORDBREAK))
 134             {
 135                 wb_i = i;
 136                 wb_j = j - 1;
 137                 wb_count = *count;
 138                 if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
 139                     return NULL;
 140                 plen += size.cx;
 141             }
 142             break;
 143
 144         default:
 145             dest[j++] = str[i++];
 146             if (!(format & DT_NOCLIP) || !(format & DT_NOPREFIX) ||
 147                 (format & DT_WORDBREAK))
 148             {
 149                 if (!GetTextExtentPoint(hdc, &dest[j-1], 1, &size))
 150                     return NULL;
 151                 plen += size.cx;
 152             }
 153         }
 154
 155         (*count)--;
 156         if (!(format & DT_NOCLIP) || (format & DT_WORDBREAK))
 157         {
 158             if (plen > width)
 159             {
 160                 if (format & DT_WORDBREAK)
 161                 {
 162                     if (wb_j)
 163                     {
 164                         *len = wb_j;
 165                         *count = wb_count - 1;
 166                         return (&str[wb_i]);
 167                     }
 168                 }
 169                 else
 170                 {
 171                     *len = j;
 172                     return (&str[i]);
 173                 }
 174             }
 175         }
 176     }
 177
 178     *len = j;
 179     return NULL;
 180 }
 181
 182
 183 /***********************************************************************
 184  *           DrawText    (USER.85)
 185  */
 186 int DrawText( HDC hdc, LPSTR str, int count, LPRECT rect, WORD flags )
 187 {
 188     SIZE size;
 189     char *strPtr;
 190     static char line[1024];
 191     int len, lh;
 192     int prefix_x = 0;
 193     int prefix_end = 0;
 194     TEXTMETRIC tm;
 195     int x = rect->left, y = rect->top;
 196     int width = rect->right - rect->left;
 197     int max_width = 0;
 198
 199     dprintf_text(stddeb,"DrawText: '%s', %d , [(%d,%d),(%d,%d)]\n", str, count,
 200            rect->left, rect->top, rect->right, rect->bottom);
 201
 202     if (count == -1) count = strlen(str);
 203     strPtr = str;
 204
 205     GetTextMetrics(hdc, &tm);
 206     if (flags & DT_EXTERNALLEADING)
 207         lh = tm.tmHeight + tm.tmExternalLeading;
 208     else
 209         lh = tm.tmHeight;
 210
 211     if (flags & DT_TABSTOP)
 212         tabstop = flags >> 8;
 213
 214     if (flags & DT_EXPANDTABS)
 215     {
 216         GetTextExtentPoint(hdc, " ", 1, &size);
 217         spacewidth = size.cx;
 218         GetTextExtentPoint(hdc, "o", 1, &size);
 219         tabwidth = size.cx * tabstop;
 220     }
 221
 222     do
 223     {
 224         prefix_offset = -1;
 225         strPtr = TEXT_NextLine(hdc, strPtr, &count, line, &len, width, flags);
 226
 227         if (prefix_offset != -1)
 228         {
 229             GetTextExtentPoint(hdc, line, prefix_offset, &size);
 230             prefix_x = size.cx;
 231             GetTextExtentPoint(hdc, line, prefix_offset + 1, &size);
 232             prefix_end = size.cx - 1;
 233         }
 234
 235         if (!GetTextExtentPoint(hdc, line, len, &size)) return 0;
 236         if (flags & DT_CENTER) x = (rect->left + rect->right -
 237                                     size.cx) / 2;
 238         else if (flags & DT_RIGHT) x = rect->right - size.cx;
 239
 240         if (flags & DT_SINGLELINE)
 241         {
 242             if (flags & DT_VCENTER) y = rect->top +
 243                 (rect->bottom - rect->top) / 2 - size.cy / 2;
 244             else if (flags & DT_BOTTOM) y = rect->bottom - size.cy;
 245         }
 246         if (!(flags & DT_CALCRECT))
 247         {
 248             if (!ExtTextOut( hdc, x, y, (flags & DT_NOCLIP) ? 0 : ETO_CLIPPED,
 249                              rect, line, len, NULL )) return 0;
 250         }
 251         else if (size.cx > max_width)
 252             max_width = size.cx;
 253
 254         if (prefix_offset != -1)
 255         {
 256             HPEN hpen = CreatePen( PS_SOLID, 1, GetTextColor(hdc) );
 257             HPEN oldPen = SelectObject( hdc, hpen );
 258             MoveTo(hdc, x + prefix_x, y + tm.tmAscent + 1 );
 259             LineTo(hdc, x + prefix_end, y + tm.tmAscent + 1 );
 260             SelectObject( hdc, oldPen );
 261             DeleteObject( hpen );
 262         }
 263
 264         y += lh;
 265         if (strPtr)
 266         {
 267             if (!(flags & DT_NOCLIP) && !(flags & DT_CALCRECT))
 268             {
 269                 if (y > rect->bottom - lh)
 270                     break;
 271             }
 272         }
 273     }
 274     while (strPtr);
 275     if (flags & DT_CALCRECT)
 276     {
 277         rect->right = rect->left + max_width;
 278         rect->bottom = y;
 279     }
 280     return 1;
 281 }
 282
 283
 284 /***********************************************************************
 285  *           ExtTextOut    (GDI.351)
 286  */
 287 BOOL ExtTextOut( HDC hdc, short x, short y, WORD flags, LPRECT lprect,
 288                  LPSTR str, WORD count, LPINT lpDx )
 289 {
 290     int dir, ascent, descent, i;
 291     XCharStruct info;
 292     XFontStruct *font;
 293     RECT rect;
 294
 295     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 296     if (!dc)
 297     {
 298         dc = (DC *)GDI_GetObjPtr( hdc, METAFILE_DC_MAGIC );
 299         if (!dc) return FALSE;
 300         MF_TextOut( dc, x, y, str, count );
 301         return TRUE;
 302     }
 303
 304     if (!DC_SetupGCForText( dc )) return TRUE;
 305     font = dc->u.x.font.fstruct;
 306
 307     dprintf_text(stddeb,"ExtTextOut: %d,%d '%*.*s', %d  flags=%d\n",
 308             x, y, count, count, str, count, flags);
 309     if (lprect != NULL) {
 310       dprintf_text(stddeb, "rect %d %d %d %d\n",
 311                    lprect->left, lprect->top, lprect->right, lprect->bottom );
 312     }
 313
 314       /* Setup coordinates */
 315
 316     if (dc->w.textAlign & TA_UPDATECP)
 317     {
 318         x = dc->w.CursPosX;
 319         y = dc->w.CursPosY;
 320     }
 321     x = XLPTODP( dc, x );
 322     y = YLPTODP( dc, y );
 323     if (flags & (ETO_OPAQUE | ETO_CLIPPED))  /* There's a rectangle */
 324     {
 325         rect.left   = XLPTODP( dc, lprect->left );
 326         rect.right  = XLPTODP( dc, lprect->right );
 327         rect.top    = YLPTODP( dc, lprect->top );
 328         rect.bottom = YLPTODP( dc, lprect->bottom );
 329         if (rect.right < rect.left) SWAP_INT( rect.left, rect.right );
 330         if (rect.bottom < rect.top) SWAP_INT( rect.top, rect.bottom );
 331     }
 332
 333       /* Draw the rectangle */
 334
 335     if (flags & ETO_OPAQUE)
 336     {
 337         XSetForeground( display, dc->u.x.gc, dc->w.backgroundPixel );
 338         XFillRectangle( display, dc->u.x.drawable, dc->u.x.gc,
 339                         dc->w.DCOrgX + rect.left, dc->w.DCOrgY + rect.top,
 340                         rect.right-rect.left, rect.bottom-rect.top );
 341     }
 342     if (!count) return TRUE;  /* Nothing more to do */
 343
 344       /* Compute text starting position */
 345
 346     XTextExtents( font, str, count, &dir, &ascent, &descent, &info );
 347     info.width += count*dc->w.charExtra + dc->w.breakExtra*dc->w.breakCount;
 348     if (lpDx) for (i = 0; i < count; i++) info.width += lpDx[i];
 349
 350     switch( dc->w.textAlign & (TA_LEFT | TA_RIGHT | TA_CENTER) )
 351     {
 352       case TA_LEFT:
 353           if (dc->w.textAlign & TA_UPDATECP)
 354               dc->w.CursPosX = XDPTOLP( dc, x + info.width );
 355           break;
 356       case TA_RIGHT:
 357           x -= info.width;
 358           if (dc->w.textAlign & TA_UPDATECP) dc->w.CursPosX = XDPTOLP( dc, x );
 359           break;
 360       case TA_CENTER:
 361           x -= info.width / 2;
 362           break;
 363     }
 364     switch( dc->w.textAlign & (TA_TOP | TA_BOTTOM | TA_BASELINE) )
 365     {
 366       case TA_TOP:
 367           y += font->ascent;
 368           break;
 369       case TA_BOTTOM:
 370           y -= font->descent;
 371           break;
 372       case TA_BASELINE:
 373           break;
 374     }
 375
 376       /* Set the clip region */
 377
 378     if (flags & ETO_CLIPPED)
 379     {
 380         SaveVisRgn( hdc );
 381         IntersectVisRect( hdc, rect.left, rect.top, rect.right, rect.bottom );
 382     }
 383
 384       /* Draw the text background if necessary */
 385
 386     if (dc->w.backgroundMode != TRANSPARENT)
 387     {
 388           /* If rectangle is opaque and clipped, do nothing */
 389         if (!(flags & ETO_CLIPPED) || !(flags & ETO_OPAQUE))
 390         {
 391               /* Only draw if rectangle is not opaque or if some */
 392               /* text is outside the rectangle */
 393             if (!(flags & ETO_OPAQUE) ||
 394                 (x < rect.left) ||
 395                 (x + info.width >= rect.right) ||
 396                 (y-font->ascent < rect.top) ||
 397                 (y+font->descent >= rect.bottom))
 398             {
 399                 XSetForeground( display, dc->u.x.gc, dc->w.backgroundPixel );
 400                 XFillRectangle( display, dc->u.x.drawable, dc->u.x.gc,
 401                                 dc->w.DCOrgX + x,
 402                                 dc->w.DCOrgY + y - font->ascent,
 403                                 info.width,
 404                                 font->ascent + font->descent );
 405             }
 406         }
 407     }
 408
 409       /* Draw the text */
 410
 411     XSetForeground( display, dc->u.x.gc, dc->w.textPixel );
 412     if (!dc->w.charExtra && !dc->w.breakExtra && !lpDx)
 413     {
 414         XDrawString( display, dc->u.x.drawable, dc->u.x.gc,
 415                      dc->w.DCOrgX + x, dc->w.DCOrgY + y, str, count );
 416     }
 417     else  /* Now the fun begins... */
 418     {
 419         XTextItem *items, *pitem;
 420
 421         items = malloc( count * sizeof(XTextItem) );
 422         for (i = 0, pitem = items; i < count; i++, pitem++)
 423         {
 424             pitem->chars  = str + i;
 425             pitem->nchars = 1;
 426             pitem->font   = None;
 427             if (i == 0)
 428             {
 429                 pitem->delta = 0;
 430                 continue;  /* First iteration -> no delta */
 431             }
 432             pitem->delta = dc->w.charExtra;
 433             if (str[i] == (char)dc->u.x.font.metrics.tmBreakChar)
 434                 pitem->delta += dc->w.breakExtra;
 435             if (lpDx)
 436             {
 437                 INT width;
 438                 GetCharWidth( hdc, str[i], str[i], &width );
 439                 pitem->delta += lpDx[i-1] - width;
 440             }
 441         }
 442         XDrawText( display, dc->u.x.drawable, dc->u.x.gc,
 443                    dc->w.DCOrgX + x, dc->w.DCOrgY + y, items, count );
 444         free( items );
 445     }
 446
 447       /* Draw underline and strike-out if needed */
 448
 449     if (dc->u.x.font.metrics.tmUnderlined)
 450     {
 451         long linePos, lineWidth;
 452         if (!XGetFontProperty( font, XA_UNDERLINE_POSITION, &linePos ))
 453             linePos = font->descent-1;
 454         if (!XGetFontProperty( font, XA_UNDERLINE_THICKNESS, &lineWidth ))
 455             lineWidth = 0;
 456         else if (lineWidth == 1) lineWidth = 0;
 457         XSetLineAttributes( display, dc->u.x.gc, lineWidth,
 458                             LineSolid, CapRound, JoinBevel );
 459         XDrawLine( display, dc->u.x.drawable, dc->u.x.gc,
 460                    dc->w.DCOrgX + x, dc->w.DCOrgY + y + linePos,
 461                    dc->w.DCOrgX + x + info.width, dc->w.DCOrgY + y + linePos );
 462     }
 463     if (dc->u.x.font.metrics.tmStruckOut)
 464     {
 465         long lineAscent, lineDescent;
 466         if (!XGetFontProperty( font, XA_STRIKEOUT_ASCENT, &lineAscent ))
 467             lineAscent = font->ascent / 3;
 468         if (!XGetFontProperty( font, XA_STRIKEOUT_DESCENT, &lineDescent ))
 469             lineDescent = -lineAscent;
 470         XSetLineAttributes( display, dc->u.x.gc, lineAscent + lineDescent,
 471                             LineSolid, CapRound, JoinBevel );
 472         XDrawLine( display, dc->u.x.drawable, dc->u.x.gc,
 473                    dc->w.DCOrgX + x, dc->w.DCOrgY + y - lineAscent,
 474                    dc->w.DCOrgX + x + info.width, dc->w.DCOrgY + y - lineAscent );
 475     }
 476     if (flags & ETO_CLIPPED) RestoreVisRgn( hdc );
 477     return TRUE;
 478 }
 479
 480
 481 /***********************************************************************
 482  *           TextOut    (GDI.33)
 483  */
 484 BOOL TextOut( HDC hdc, short x, short y, LPSTR str, short count )
 485 {
 486     return ExtTextOut( hdc, x, y, 0, NULL, str, count, NULL );
 487 }
 488
 489
 490 /***********************************************************************
 491  *              GrayString (USER.185)
 492  */
 493 BOOL GrayString(HDC hdc, HBRUSH hbr, FARPROC gsprc, LPARAM lParam,
 494                 INT cch, INT x, INT y, INT cx, INT cy)
 495 {
 496         int s, current_color;
 497
 498         if (gsprc) {
 499                 return CallGrayStringProc(gsprc, hdc, lParam,
 500                                         cch ? cch : lstrlen((LPCSTR) lParam) );
 501         } else {
 502                 current_color = GetTextColor(hdc);
 503                 SetTextColor(hdc, GetSysColor(COLOR_GRAYTEXT) );
 504                 s = TextOut(hdc, x, y, (LPSTR) lParam,
 505                                 cch ? cch : lstrlen((LPCSTR) lParam) );
 506                 SetTextColor(hdc, current_color);
 507
 508                 return s;
 509         }
 510 }
 511
 512
 513 /***********************************************************************
 514  *           TEXT_TabbedTextOut
 515  *
 516  * Helper function for TabbedTextOut() and GetTabbedTextExtent().
 517  * Note: this doesn't work too well for text-alignment modes other
 518  *       than TA_LEFT|TA_TOP. But we want bug-for-bug compatibility :-)
 519  */
 520 LONG TEXT_TabbedTextOut( HDC hdc, int x, int y, LPSTR lpstr, int count,
 521                          int cTabStops, LPINT lpTabPos, int nTabOrg,
 522                          BOOL fDisplayText)
 523 {
 524     WORD defWidth;
 525     DWORD extent;
 526     int i, tabPos = 0;
 527
 528     if (cTabStops == 1) defWidth = *lpTabPos;
 529     else
 530     {
 531         TEXTMETRIC tm;
 532         GetTextMetrics( hdc, &tm );
 533         defWidth = 8 * tm.tmAveCharWidth;
 534     }
 535
 536     while (count > 0)
 537     {
 538         for (i = 0; i < count; i++)
 539             if (lpstr[i] == '\t') break;
 540         extent = GetTextExtent( hdc, lpstr, i );
 541         while ((cTabStops > 0) && (nTabOrg + *lpTabPos < x + LOWORD(extent)))
 542         {
 543             lpTabPos++;
 544             cTabStops--;
 545         }
 546         if (lpstr[i] != '\t')
 547             tabPos = x + LOWORD(extent);
 548         else if (cTabStops > 0)
 549             tabPos = nTabOrg + *lpTabPos;
 550         else
 551             tabPos = (x + LOWORD(extent) + defWidth - 1) / defWidth * defWidth;
 552         if (fDisplayText)
 553         {
 554             RECT r;
 555             SetRect( &r, x, y, tabPos, y+HIWORD(extent) );
 556             ExtTextOut( hdc, x, y,
 557                         GetBkMode(hdc) == OPAQUE ? ETO_OPAQUE : 0,
 558                         &r, lpstr, i, NULL );
 559         }
 560         x = tabPos;
 561         count -= i+1;
 562         lpstr += i+1;
 563     }
 564     return tabPos;
 565 }
 566
 567
 568 /***********************************************************************
 569  *           TabbedTextOut    (USER.196)
 570  */
 571 LONG TabbedTextOut( HDC hdc, short x, short y, LPSTR lpstr, short count,
 572                     short cTabStops, LPINT lpTabPos, short nTabOrg )
 573 {
 574     dprintf_text( stddeb, "TabbedTextOut: %x %d,%d '%*.*s' %d\n",
 575                   hdc, x, y, count, count, lpstr, count );
 576     return TEXT_TabbedTextOut( hdc, x, y, lpstr, count, cTabStops,
 577                                lpTabPos, nTabOrg, TRUE );
 578 }
 579
 580
 581 /***********************************************************************
 582  *           GetTabbedTextExtent    (USER.197)
 583  */
 584 DWORD GetTabbedTextExtent( HDC hdc, LPSTR lpstr, int count,
 585                           int cTabStops, LPINT lpTabPos )
 586 {
 587     dprintf_text( stddeb, "GetTabbedTextExtent: %x '%*.*s' %d\n",
 588                   hdc, count, count, lpstr, count );
 589     return TEXT_TabbedTextOut( hdc, 0, 0, lpstr, count, cTabStops,
 590                                lpTabPos, 0, FALSE );
 591 }