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, prefix_x, prefix_end;
 192     TEXTMETRIC tm;
 193     int x = rect->left, y = rect->top;
 194     int width = rect->right - rect->left;
 195     int max_width = 0;
 196
 197     dprintf_text(stddeb,"DrawText: '%s', %d , [(%d,%d),(%d,%d)]\n", str, count,
 198            rect->left, rect->top, rect->right, rect->bottom);
 199
 200     if (count == -1) count = strlen(str);
 201     strPtr = str;
 202
 203     GetTextMetrics(hdc, &tm);
 204     if (flags & DT_EXTERNALLEADING)
 205         lh = tm.tmHeight + tm.tmExternalLeading;
 206     else
 207         lh = tm.tmHeight;
 208
 209     if (flags & DT_TABSTOP)
 210         tabstop = flags >> 8;
 211
 212     if (flags & DT_EXPANDTABS)
 213     {
 214         GetTextExtentPoint(hdc, " ", 1, &size);
 215         spacewidth = size.cx;
 216         GetTextExtentPoint(hdc, "o", 1, &size);
 217         tabwidth = size.cx * tabstop;
 218     }
 219
 220     do
 221     {
 222         prefix_offset = -1;
 223         strPtr = TEXT_NextLine(hdc, strPtr, &count, line, &len, width, flags);
 224
 225         if (prefix_offset != -1)
 226         {
 227             GetTextExtentPoint(hdc, line, prefix_offset, &size);
 228             prefix_x = size.cx;
 229             GetTextExtentPoint(hdc, line, prefix_offset + 1, &size);
 230             prefix_end = size.cx - 1;
 231         }
 232
 233         if (!GetTextExtentPoint(hdc, line, len, &size)) return 0;
 234         if (flags & DT_CENTER) x = (rect->left + rect->right -
 235                                     size.cx) / 2;
 236         else if (flags & DT_RIGHT) x = rect->right - size.cx;
 237
 238         if (flags & DT_SINGLELINE)
 239         {
 240             if (flags & DT_VCENTER) y = rect->top +
 241                 (rect->bottom - rect->top) / 2 - size.cy / 2;
 242             else if (flags & DT_BOTTOM) y = rect->bottom - size.cy;
 243         }
 244         if (!(flags & DT_CALCRECT))
 245         {
 246             if (!ExtTextOut( hdc, x, y, (flags & DT_NOCLIP) ? 0 : ETO_CLIPPED,
 247                              rect, line, len, NULL )) return 0;
 248         }
 249         else if (size.cx > max_width)
 250             max_width = size.cx;
 251
 252         if (prefix_offset != -1)
 253         {
 254             HPEN hpen = CreatePen( PS_SOLID, 1, GetTextColor(hdc) );
 255             HPEN oldPen = SelectObject( hdc, hpen );
 256             MoveTo(hdc, x + prefix_x, y + tm.tmAscent + 1 );
 257             LineTo(hdc, x + prefix_end, y + tm.tmAscent + 1 );
 258             SelectObject( hdc, oldPen );
 259             DeleteObject( hpen );
 260         }
 261
 262         y += lh;
 263         if (strPtr)
 264         {
 265             if (!(flags & DT_NOCLIP))
 266             {
 267                 if (y > rect->bottom - lh)
 268                     break;
 269             }
 270         }
 271     }
 272     while (strPtr);
 273     if (flags & DT_CALCRECT)
 274     {
 275         rect->right = rect->left + max_width;
 276         rect->bottom = y;
 277     }
 278     return 1;
 279 }
 280
 281
 282 /***********************************************************************
 283  *           ExtTextOut    (GDI.351)
 284  */
 285 BOOL ExtTextOut( HDC hdc, short x, short y, WORD flags, LPRECT lprect,
 286                  LPSTR str, WORD count, LPINT lpDx )
 287 {
 288     int dir, ascent, descent, i;
 289     XCharStruct info;
 290     XFontStruct *font;
 291     RECT rect;
 292
 293     DC * dc = (DC *) GDI_GetObjPtr( hdc, DC_MAGIC );
 294     if (!dc)
 295     {
 296         dc = (DC *)GDI_GetObjPtr( hdc, METAFILE_DC_MAGIC );
 297         if (!dc) return FALSE;
 298         MF_TextOut( dc, x, y, str, count );
 299         return TRUE;
 300     }
 301
 302     if (!DC_SetupGCForText( dc )) return TRUE;
 303     font = dc->u.x.font.fstruct;
 304
 305     dprintf_text(stddeb,"ExtTextOut: %d,%d '%*.*s', %d  flags=%d rect=%d,%d,%d,%d\n",
 306             x, y, count, count, str, count, flags,
 307             lprect->left, lprect->top, lprect->right, lprect->bottom );
 308
 309       /* Setup coordinates */
 310
 311     if (dc->w.textAlign & TA_UPDATECP)
 312     {
 313         x = dc->w.CursPosX;
 314         y = dc->w.CursPosY;
 315     }
 316     x = XLPTODP( dc, x );
 317     y = YLPTODP( dc, y );
 318     if (flags & (ETO_OPAQUE | ETO_CLIPPED))  /* There's a rectangle */
 319     {
 320         rect.left   = XLPTODP( dc, lprect->left );
 321         rect.right  = XLPTODP( dc, lprect->right );
 322         rect.top    = YLPTODP( dc, lprect->top );
 323         rect.bottom = YLPTODP( dc, lprect->bottom );
 324         if (rect.right < rect.left) SWAP_INT( rect.left, rect.right );
 325         if (rect.bottom < rect.top) SWAP_INT( rect.top, rect.bottom );
 326     }
 327
 328       /* Draw the rectangle */
 329
 330     if (flags & ETO_OPAQUE)
 331     {
 332         XSetForeground( display, dc->u.x.gc, dc->w.backgroundPixel );
 333         XFillRectangle( display, dc->u.x.drawable, dc->u.x.gc,
 334                         dc->w.DCOrgX + rect.left, dc->w.DCOrgY + rect.top,
 335                         rect.right-rect.left, rect.bottom-rect.top );
 336     }
 337     if (!count) return TRUE;  /* Nothing more to do */
 338
 339       /* Compute text starting position */
 340
 341     XTextExtents( font, str, count, &dir, &ascent, &descent, &info );
 342     info.width += count*dc->w.charExtra + dc->w.breakExtra*dc->w.breakCount;
 343     if (lpDx) for (i = 0; i < count; i++) info.width += lpDx[i];
 344
 345     switch( dc->w.textAlign & (TA_LEFT | TA_RIGHT | TA_CENTER) )
 346     {
 347       case TA_LEFT:
 348           if (dc->w.textAlign & TA_UPDATECP)
 349               dc->w.CursPosX = XDPTOLP( dc, x + info.width );
 350           break;
 351       case TA_RIGHT:
 352           x -= info.width;
 353           if (dc->w.textAlign & TA_UPDATECP) dc->w.CursPosX = XDPTOLP( dc, x );
 354           break;
 355       case TA_CENTER:
 356           x -= info.width / 2;
 357           break;
 358     }
 359     switch( dc->w.textAlign & (TA_TOP | TA_BOTTOM | TA_BASELINE) )
 360     {
 361       case TA_TOP:
 362           y += font->ascent;
 363           break;
 364       case TA_BOTTOM:
 365           y -= font->descent;
 366           break;
 367       case TA_BASELINE:
 368           break;
 369     }
 370
 371       /* Set the clip region */
 372
 373     if (flags & ETO_CLIPPED)
 374     {
 375         SaveVisRgn( hdc );
 376         IntersectVisRect( hdc, rect.left, rect.top, rect.right, rect.bottom );
 377     }
 378
 379       /* Draw the text background if necessary */
 380
 381     if (dc->w.backgroundMode != TRANSPARENT)
 382     {
 383           /* If rectangle is opaque and clipped, do nothing */
 384         if (!(flags & ETO_CLIPPED) || !(flags & ETO_OPAQUE))
 385         {
 386               /* Only draw if rectangle is not opaque or if some */
 387               /* text is outside the rectangle */
 388             if (!(flags & ETO_OPAQUE) ||
 389                 (x < rect.left) ||
 390                 (x + info.width >= rect.right) ||
 391                 (y-font->ascent < rect.top) ||
 392                 (y+font->descent >= rect.bottom))
 393             {
 394                 XSetForeground( display, dc->u.x.gc, dc->w.backgroundPixel );
 395                 XFillRectangle( display, dc->u.x.drawable, dc->u.x.gc,
 396                                 dc->w.DCOrgX + x,
 397                                 dc->w.DCOrgY + y - font->ascent,
 398                                 info.width,
 399                                 font->ascent + font->descent );
 400             }
 401         }
 402     }
 403
 404       /* Draw the text */
 405
 406     XSetForeground( display, dc->u.x.gc, dc->w.textPixel );
 407     if (!dc->w.charExtra && !dc->w.breakExtra && !lpDx)
 408     {
 409         XDrawString( display, dc->u.x.drawable, dc->u.x.gc,
 410                      dc->w.DCOrgX + x, dc->w.DCOrgY + y, str, count );
 411     }
 412     else  /* Now the fun begins... */
 413     {
 414         XTextItem *items, *pitem;
 415
 416         items = malloc( count * sizeof(XTextItem) );
 417         for (i = 0, pitem = items; i < count; i++, pitem++)
 418         {
 419             pitem->chars  = str + i;
 420             pitem->nchars = 1;
 421             pitem->font   = None;
 422             if (i == 0)
 423             {
 424                 pitem->delta = 0;
 425                 continue;  /* First iteration -> no delta */
 426             }
 427             pitem->delta = dc->w.charExtra;
 428             if (str[i] == (char)dc->u.x.font.metrics.tmBreakChar)
 429                 pitem->delta += dc->w.breakExtra;
 430             if (lpDx)
 431             {
 432                 INT width;
 433                 GetCharWidth( hdc, str[i], str[i], &width );
 434                 pitem->delta += lpDx[i-1] - width;
 435             }
 436         }
 437         XDrawText( display, dc->u.x.drawable, dc->u.x.gc,
 438                    dc->w.DCOrgX + x, dc->w.DCOrgY + y, items, count );
 439         free( items );
 440     }
 441
 442       /* Draw underline and strike-out if needed */
 443
 444     if (dc->u.x.font.metrics.tmUnderlined)
 445     {
 446         long linePos, lineWidth;
 447         if (!XGetFontProperty( font, XA_UNDERLINE_POSITION, &linePos ))
 448             linePos = font->descent-1;
 449         if (!XGetFontProperty( font, XA_UNDERLINE_THICKNESS, &lineWidth ))
 450             lineWidth = 0;
 451         else if (lineWidth == 1) lineWidth = 0;
 452         XSetLineAttributes( display, dc->u.x.gc, lineWidth,
 453                             LineSolid, CapRound, JoinBevel );
 454         XDrawLine( display, dc->u.x.drawable, dc->u.x.gc,
 455                    dc->w.DCOrgX + x, dc->w.DCOrgY + y + linePos,
 456                    dc->w.DCOrgX + x + info.width, dc->w.DCOrgY + y + linePos );
 457     }
 458     if (dc->u.x.font.metrics.tmStruckOut)
 459     {
 460         long lineAscent, lineDescent;
 461         if (!XGetFontProperty( font, XA_STRIKEOUT_ASCENT, &lineAscent ))
 462             lineAscent = font->ascent / 3;
 463         if (!XGetFontProperty( font, XA_STRIKEOUT_DESCENT, &lineDescent ))
 464             lineDescent = -lineAscent;
 465         XSetLineAttributes( display, dc->u.x.gc, lineAscent + lineDescent,
 466                             LineSolid, CapRound, JoinBevel );
 467         XDrawLine( display, dc->u.x.drawable, dc->u.x.gc,
 468                    dc->w.DCOrgX + x, dc->w.DCOrgY + y - lineAscent,
 469                    dc->w.DCOrgX + x + info.width, dc->w.DCOrgY + y - lineAscent );
 470     }
 471     if (flags & ETO_CLIPPED) RestoreVisRgn( hdc );
 472     return TRUE;
 473 }
 474
 475
 476 /***********************************************************************
 477  *           TextOut    (GDI.33)
 478  */
 479 BOOL TextOut( HDC hdc, short x, short y, LPSTR str, short count )
 480 {
 481     return ExtTextOut( hdc, x, y, 0, NULL, str, count, NULL );
 482 }
 483
 484
 485 /***********************************************************************
 486  *              GrayString (USER.185)
 487  */
 488 BOOL GrayString(HDC hdc, HBRUSH hbr, FARPROC gsprc, LPARAM lParam,
 489                 INT cch, INT x, INT y, INT cx, INT cy)
 490 {
 491         int s, current_color;
 492
 493         if (gsprc) {
 494                 return CallGrayStringProc(gsprc, hdc, lParam,
 495                                         cch ? cch : lstrlen((LPCSTR) lParam) );
 496         } else {
 497                 current_color = GetTextColor(hdc);
 498                 SetTextColor(hdc, GetSysColor(COLOR_GRAYTEXT) );
 499                 s = TextOut(hdc, x, y, (LPSTR) lParam,
 500                                 cch ? cch : lstrlen((LPCSTR) lParam) );
 501                 SetTextColor(hdc, current_color);
 502
 503                 return s;
 504         }
 505 }
 506
 507
 508 /***********************************************************************
 509  *           TEXT_TabbedTextOut
 510  *
 511  * Helper function for TabbedTextOut() and GetTabbedTextExtent().
 512  * Note: this doesn't work too well for text-alignment modes other
 513  *       than TA_LEFT|TA_TOP. But we want bug-for-bug compatibility :-)
 514  */
 515 LONG TEXT_TabbedTextOut( HDC hdc, int x, int y, LPSTR lpstr, int count,
 516                          int cTabStops, LPINT lpTabPos, int nTabOrg,
 517                          BOOL fDisplayText)
 518 {
 519     WORD defWidth;
 520     DWORD extent;
 521     int i, tabPos = 0;
 522
 523     if (cTabStops == 1) defWidth = *lpTabPos;
 524     else
 525     {
 526         TEXTMETRIC tm;
 527         GetTextMetrics( hdc, &tm );
 528         defWidth = 8 * tm.tmAveCharWidth;
 529     }
 530
 531     while (count > 0)
 532     {
 533         for (i = 0; i < count; i++)
 534             if (lpstr[i] == '\t') break;
 535         extent = GetTextExtent( hdc, lpstr, i );
 536         while ((cTabStops > 0) && (nTabOrg + *lpTabPos < x + LOWORD(extent)))
 537         {
 538             lpTabPos++;
 539             cTabStops--;
 540         }
 541         if (lpstr[i] != '\t')
 542             tabPos = x + LOWORD(extent);
 543         else if (cTabStops > 0)
 544             tabPos = nTabOrg + *lpTabPos;
 545         else
 546             tabPos = (x + LOWORD(extent) + defWidth - 1) / defWidth * defWidth;
 547         if (fDisplayText)
 548         {
 549             RECT r;
 550             SetRect( &r, x, y, tabPos, y+HIWORD(extent) );
 551             ExtTextOut( hdc, x, y,
 552                         GetBkMode(hdc) == OPAQUE ? ETO_OPAQUE : 0,
 553                         &r, lpstr, i, NULL );
 554         }
 555         x = tabPos;
 556         count -= i+1;
 557         lpstr += i+1;
 558     }
 559     return tabPos;
 560 }
 561
 562
 563 /***********************************************************************
 564  *           TabbedTextOut    (USER.196)
 565  */
 566 LONG TabbedTextOut( HDC hdc, short x, short y, LPSTR lpstr, short count,
 567                     short cTabStops, LPINT lpTabPos, short nTabOrg )
 568 {
 569     dprintf_text( stddeb, "TabbedTextOut: %x %d,%d '%*.*s' %d\n",
 570                   hdc, x, y, count, count, lpstr, count );
 571     return TEXT_TabbedTextOut( hdc, x, y, lpstr, count, cTabStops,
 572                                lpTabPos, nTabOrg, TRUE );
 573 }
 574
 575
 576 /***********************************************************************
 577  *           GetTabbedTextExtent    (USER.197)
 578  */
 579 DWORD GetTabbedTextExtent( HDC hdc, LPSTR lpstr, int count,
 580                           int cTabStops, LPINT lpTabPos )
 581 {
 582     dprintf_text( stddeb, "GetTabbedTextExtent: %x '%*.*s' %d\n",
 583                   hdc, count, count, lpstr, count );
 584     return TEXT_TabbedTextOut( hdc, 0, 0, lpstr, count, cTabStops,
 585                                lpTabPos, 0, FALSE );
 586 }