dlls/riched20/paint.c

   1 /*
   2  * RichEdit - painting functions
   3  *
   4  * Copyright 2004 by Krzysztof Foltman
   5  * Copyright 2005 by Phil Krylov
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "editor.h"
  23
  24 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
  25
  26 void ME_PaintContent(ME_TextEditor *editor, HDC hDC, BOOL bOnlyNew, RECT *rcUpdate) {
  27   ME_DisplayItem *item;
  28   ME_Context c;
  29   int yoffset;
  30
  31   editor->nSequence++;
  32   yoffset = ME_GetYScrollPos(editor);
  33   ME_InitContext(&c, editor, hDC);
  34   SetBkMode(hDC, TRANSPARENT);
  35   ME_MoveCaret(editor);
  36   item = editor->pBuffer->pFirst->next;
  37   c.pt.y -= yoffset;
  38   while(item != editor->pBuffer->pLast) {
  39     int ye;
  40     assert(item->type == diParagraph);
  41     ye = c.pt.y + item->member.para.nHeight;
  42     if (!bOnlyNew || (item->member.para.nFlags & MEPF_REPAINT))
  43     {
  44       BOOL bPaint = (rcUpdate == NULL);
  45       if (rcUpdate)
  46         bPaint = c.pt.y<rcUpdate->bottom &&
  47           c.pt.y+item->member.para.nHeight>rcUpdate->top;
  48       if (bPaint)
  49       {
  50         ME_DrawParagraph(&c, item);
  51         if (!rcUpdate || (rcUpdate->top<=c.pt.y && rcUpdate->bottom>=ye))
  52           item->member.para.nFlags &= ~MEPF_REPAINT;
  53       }
  54     }
  55     c.pt.y = ye;
  56     item = item->member.para.next_para;
  57   }
  58   if (c.pt.y<c.rcView.bottom) {
  59     RECT rc;
  60     int xs = c.rcView.left, xe = c.rcView.right;
  61     int ys = c.pt.y, ye = c.rcView.bottom;
  62
  63     if (bOnlyNew)
  64     {
  65       int y1 = editor->nTotalLength-yoffset, y2 = editor->nLastTotalLength-yoffset;
  66       if (y1<y2)
  67         ys = y1, ye = y2+1;
  68       else
  69         ys = ye;
  70     }
  71
  72     if (rcUpdate && ys!=ye)
  73     {
  74       xs = rcUpdate->left, xe = rcUpdate->right;
  75       if (rcUpdate->top > ys)
  76         ys = rcUpdate->top;
  77       if (rcUpdate->bottom < ye)
  78         ye = rcUpdate->bottom;
  79     }
  80
  81     if (ye>ys) {
  82       rc.left = xs;
  83       rc.top = ys;
  84       rc.right = xe;
  85       rc.bottom = ye;
  86       FillRect(hDC, &rc, c.editor->hbrBackground);
  87     }
  88     if (ys == c.pt.y) /* don't overwrite the top bar */
  89       ys++;
  90   }
  91   if (editor->nTotalLength != editor->nLastTotalLength)
  92     ME_SendRequestResize(editor, FALSE);
  93   editor->nLastTotalLength = editor->nTotalLength;
  94   ME_DestroyContext(&c);
  95 }
  96
  97 void ME_Repaint(ME_TextEditor *editor)
  98 {
  99   ME_Cursor *pCursor = &editor->pCursors[0];
 100
 101   if (ME_WrapMarkedParagraphs(editor)) {
 102     ME_UpdateScrollBar(editor);
 103   }
 104   if (editor->bRedraw)
 105   {
 106     ME_EnsureVisible(editor, pCursor->pRun);
 107     UpdateWindow(editor->hWnd);
 108   }
 109 }
 110
 111 void ME_UpdateRepaint(ME_TextEditor *editor)
 112 {
 113 /*
 114   InvalidateRect(editor->hWnd, NULL, TRUE);
 115   */
 116   ME_SendOldNotify(editor, EN_CHANGE);
 117   ME_Repaint(editor);
 118   ME_SendOldNotify(editor, EN_UPDATE);
 119   ME_SendSelChange(editor);
 120 }
 121
 122
 123 void
 124 ME_RewrapRepaint(ME_TextEditor *editor)
 125 {
 126   ME_MarkAllForWrapping(editor);
 127   ME_WrapMarkedParagraphs(editor);
 128   ME_UpdateScrollBar(editor);
 129   ME_Repaint(editor);
 130 }
 131
 132
 133 static void ME_DrawTextWithStyle(ME_Context *c, int x, int y, LPCWSTR szText, int nChars,
 134   ME_Style *s, int *width, int nSelFrom, int nSelTo, int ymin, int cy) {
 135   HDC hDC = c->hDC;
 136   HGDIOBJ hOldFont;
 137   COLORREF rgbOld, rgbBack;
 138   int yOffset = 0, yTwipsOffset = 0;
 139   hOldFont = ME_SelectStyleFont(c->editor, hDC, s);
 140   rgbBack = ME_GetBackColor(c->editor);
 141   if ((s->fmt.dwMask & CFM_COLOR) && (s->fmt.dwEffects & CFE_AUTOCOLOR))
 142     rgbOld = SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT));
 143   else
 144     rgbOld = SetTextColor(hDC, s->fmt.crTextColor);
 145   if ((s->fmt.dwMask & s->fmt.dwEffects) & CFM_OFFSET) {
 146     yTwipsOffset = s->fmt.yOffset;
 147   }
 148   if ((s->fmt.dwMask & s->fmt.dwEffects) & (CFM_SUPERSCRIPT | CFM_SUBSCRIPT)) {
 149     if (s->fmt.dwEffects & CFE_SUPERSCRIPT) yTwipsOffset = s->fmt.yHeight/3;
 150     if (s->fmt.dwEffects & CFE_SUBSCRIPT) yTwipsOffset = -s->fmt.yHeight/12;
 151   }
 152   if (yTwipsOffset)
 153   {
 154     int numerator = 1;
 155     int denominator = 1;
 156
 157     if (c->editor->nZoomNumerator)
 158     {
 159       numerator = c->editor->nZoomNumerator;
 160       denominator = c->editor->nZoomDenominator;
 161     }
 162     yOffset = yTwipsOffset * GetDeviceCaps(hDC, LOGPIXELSY) * numerator / denominator / 1440;
 163   }
 164   ExtTextOutW(hDC, x, y-yOffset, 0, NULL, szText, nChars, NULL);
 165   if (width) {
 166     SIZE sz;
 167     GetTextExtentPoint32W(hDC, szText, nChars, &sz);
 168     *width = sz.cx;
 169   }
 170   if (nSelFrom < nChars && nSelTo >= 0 && nSelFrom<nSelTo)
 171   {
 172     SIZE sz;
 173     if (nSelFrom < 0) nSelFrom = 0;
 174     if (nSelTo > nChars) nSelTo = nChars;
 175     GetTextExtentPoint32W(hDC, szText, nSelFrom, &sz);
 176     x += sz.cx;
 177     GetTextExtentPoint32W(hDC, szText+nSelFrom, nSelTo-nSelFrom, &sz);
 178     PatBlt(hDC, x, ymin, sz.cx, cy, DSTINVERT);
 179   }
 180   SetTextColor(hDC, rgbOld);
 181   ME_UnselectStyleFont(c->editor, hDC, s, hOldFont);
 182 }
 183
 184 static void ME_DebugWrite(HDC hDC, POINT *pt, WCHAR *szText) {
 185   int align = SetTextAlign(hDC, TA_LEFT|TA_TOP);
 186   HGDIOBJ hFont = SelectObject(hDC, GetStockObject(DEFAULT_GUI_FONT));
 187   COLORREF color = SetTextColor(hDC, RGB(128,128,128));
 188   TextOutW(hDC, pt->x, pt->y, szText, lstrlenW(szText));
 189   SelectObject(hDC, hFont);
 190   SetTextAlign(hDC, align);
 191   SetTextColor(hDC, color);
 192 }
 193
 194 void ME_DrawGraphics(ME_Context *c, int x, int y, ME_Run *run,
 195                      ME_Paragraph *para, BOOL selected) {
 196   SIZE sz;
 197   int xs, ys, xe, ye, h, ym, width, eyes;
 198   ME_GetGraphicsSize(c->editor, run, &sz);
 199   xs = run->pt.x;
 200   ys = y-sz.cy;
 201   xe = xs+sz.cx;
 202   ye = y;
 203   h = ye-ys;
 204   ym = ys+h/4;
 205   width = sz.cx;
 206   eyes = width/8;
 207   /* draw a smiling face :) */
 208   Ellipse(c->hDC, xs, ys, xe, ye);
 209   Ellipse(c->hDC, xs+width/8, ym, x+width/8+eyes, ym+eyes);
 210   Ellipse(c->hDC, xs+7*width/8-eyes, ym, xs+7*width/8, ym+eyes);
 211   MoveToEx(c->hDC, xs+width/8, ys+3*h/4-eyes, NULL);
 212   LineTo(c->hDC, xs+width/8, ys+3*h/4);
 213   LineTo(c->hDC, xs+7*width/8, ys+3*h/4);
 214   LineTo(c->hDC, xs+7*width/8, ys+3*h/4-eyes);
 215   if (selected)
 216   {
 217     /* descent is usually (always?) 0 for graphics */
 218     PatBlt(c->hDC, x, y-run->nAscent, sz.cx, run->nAscent+run->nDescent, DSTINVERT);
 219   }
 220 }
 221
 222 static void ME_DrawRun(ME_Context *c, int x, int y, ME_DisplayItem *rundi, ME_Paragraph *para) {
 223   ME_Run *run = &rundi->member.run;
 224   ME_DisplayItem *start = ME_FindItemBack(rundi, diStartRow);
 225   int runofs = run->nCharOfs+para->nCharOfs;
 226   int nSelFrom, nSelTo;
 227   const WCHAR wszSpace[] = {' ', 0};
 228
 229   if (run->nFlags & MERF_HIDDEN)
 230     return;
 231
 232   ME_GetSelection(c->editor, &nSelFrom, &nSelTo);
 233
 234   /* Draw selected end-of-paragraph mark */
 235   if (run->nFlags & MERF_ENDPARA && runofs >= nSelFrom && runofs < nSelTo)
 236     ME_DrawTextWithStyle(c, x, y, wszSpace, 1, run->style, NULL, 0, 1,
 237                          c->pt.y + start->member.row.nYPos,
 238                          start->member.row.nHeight);
 239
 240   /* you can always comment it out if you need visible paragraph marks */
 241   if (run->nFlags & (MERF_ENDPARA | MERF_TAB | MERF_CELL))
 242     return;
 243
 244   if (run->nFlags & MERF_GRAPHICS)
 245     ME_DrawGraphics(c, x, y, run, para, (runofs >= nSelFrom) && (runofs < nSelTo));
 246   else
 247     ME_DrawTextWithStyle(c, x, y,
 248       run->strText->szData, ME_StrVLen(run->strText), run->style, NULL,
 249         nSelFrom-runofs,nSelTo-runofs, c->pt.y+start->member.row.nYPos, start->member.row.nHeight);
 250 }
 251
 252 COLORREF ME_GetBackColor(ME_TextEditor *editor)
 253 {
 254 /* Looks like I was seriously confused
 255     return GetSysColor((GetWindowLong(editor->hWnd, GWL_STYLE) & ES_READONLY) ? COLOR_3DFACE: COLOR_WINDOW);
 256 */
 257   if (editor->rgbBackColor == -1)
 258     return GetSysColor(COLOR_WINDOW);
 259   else
 260     return editor->rgbBackColor;
 261 }
 262
 263 void ME_DrawParagraph(ME_Context *c, ME_DisplayItem *paragraph) {
 264   int align = SetTextAlign(c->hDC, TA_BASELINE);
 265   ME_DisplayItem *p;
 266   ME_Run *run;
 267   ME_Paragraph *para = NULL;
 268   RECT rc, rcPara;
 269   int y = c->pt.y;
 270   int height = 0, baseline = 0, no=0, pno = 0;
 271   int xs, xe;
 272   int visible = 0;
 273   int nMargWidth = 0;
 274
 275   c->pt.x = c->rcView.left;
 276   rcPara.left = c->rcView.left;
 277   rcPara.right = c->rcView.right;
 278   for (p = paragraph; p!=paragraph->member.para.next_para; p = p->next) {
 279     switch(p->type) {
 280       case diParagraph:
 281         para = &p->member.para;
 282         break;
 283       case diStartRow:
 284         assert(para);
 285         nMargWidth = (pno==0?para->nFirstMargin:para->nLeftMargin);
 286         xs = c->rcView.left+nMargWidth;
 287         xe = c->rcView.right-para->nRightMargin;
 288         y += height;
 289         rcPara.top = y;
 290         rcPara.bottom = y+p->member.row.nHeight;
 291         visible = RectVisible(c->hDC, &rcPara);
 292         if (visible) {
 293           HBRUSH hbr;
 294           hbr = CreateSolidBrush(ME_GetBackColor(c->editor));
 295           /* left margin */
 296           rc.left = c->rcView.left;
 297           rc.right = c->rcView.left+nMargWidth;
 298           rc.top = y;
 299           rc.bottom = y+p->member.row.nHeight;
 300           FillRect(c->hDC, &rc, hbr/* c->hbrMargin */);
 301           /* right margin */
 302           rc.left = xe;
 303           rc.right = c->rcView.right;
 304           FillRect(c->hDC, &rc, hbr/* c->hbrMargin */);
 305           rc.left = c->rcView.left+nMargWidth;
 306           rc.right = xe;
 307           FillRect(c->hDC, &rc, hbr);
 308           DeleteObject(hbr);
 309         }
 310         if (me_debug)
 311         {
 312           const WCHAR wszRowDebug[] = {'r','o','w','[','%','d',']',0};
 313           WCHAR buf[128];
 314           POINT pt = c->pt;
 315           wsprintfW(buf, wszRowDebug, no);
 316           pt.y = 12+y;
 317           ME_DebugWrite(c->hDC, &pt, buf);
 318         }
 319
 320         height = p->member.row.nHeight;
 321         baseline = p->member.row.nBaseline;
 322         pno++;
 323         break;
 324       case diRun:
 325         assert(para);
 326         run = &p->member.run;
 327         if (visible && me_debug) {
 328           rc.left = c->rcView.left+run->pt.x;
 329           rc.right = c->rcView.left+run->pt.x+run->nWidth;
 330           rc.top = c->pt.y+run->pt.y;
 331           rc.bottom = c->pt.y+run->pt.y+height;
 332           TRACE("rc = (%ld, %ld, %ld, %ld)\n", rc.left, rc.top, rc.right, rc.bottom);
 333           if (run->nFlags & MERF_SKIPPED)
 334             DrawFocusRect(c->hDC, &rc);
 335           else
 336             FrameRect(c->hDC, &rc, GetSysColorBrush(COLOR_GRAYTEXT));
 337         }
 338         if (visible)
 339           ME_DrawRun(c, run->pt.x, c->pt.y+run->pt.y+baseline, p, &paragraph->member.para);
 340         if (me_debug)
 341         {
 342           /* I'm using %ls, hope wsprintfW is not going to use wrong (4-byte) WCHAR version */
 343           const WCHAR wszRunDebug[] = {'[','%','d',':','%','x',']',' ','%','l','s',0};
 344           WCHAR buf[2560];
 345           POINT pt;
 346           pt.x = run->pt.x;
 347           pt.y = c->pt.y + run->pt.y;
 348           wsprintfW(buf, wszRunDebug, no, p->member.run.nFlags, p->member.run.strText->szData);
 349           ME_DebugWrite(c->hDC, &pt, buf);
 350         }
 351         /* c->pt.x += p->member.run.nWidth; */
 352         break;
 353       default:
 354         break;
 355     }
 356     no++;
 357   }
 358   SetTextAlign(c->hDC, align);
 359 }
 360
 361 void ME_Scroll(ME_TextEditor *editor, int cx, int cy)
 362 {
 363   SCROLLINFO si;
 364   HWND hWnd = editor->hWnd;
 365
 366   si.cbSize = sizeof(SCROLLINFO);
 367   si.fMask = SIF_POS;
 368   GetScrollInfo(hWnd, SB_VERT, &si);
 369   si.nPos = editor->nScrollPosY -= cy;
 370   SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
 371   if (editor->bRedraw)
 372   {
 373     if (abs(cy) > editor->sizeWindow.cy)
 374       InvalidateRect(editor->hWnd, NULL, TRUE);
 375     else
 376       ScrollWindowEx(hWnd, cx, cy, NULL, NULL, NULL, NULL, SW_ERASE|SW_INVALIDATE);
 377   }
 378 }
 379
 380 void ME_UpdateScrollBar(ME_TextEditor *editor)
 381 {
 382   HWND hWnd = editor->hWnd;
 383   SCROLLINFO si;
 384   int nOldLen = editor->nTotalLength;
 385   BOOL bScrollY = (editor->nTotalLength > editor->sizeWindow.cy);
 386   BOOL bUpdateScrollBars;
 387   si.cbSize = sizeof(si);
 388   si.fMask = SIF_POS | SIF_RANGE;
 389   GetScrollInfo(hWnd, SB_VERT, &si);
 390   bUpdateScrollBars = (bScrollY || editor->bScrollY)&& ((si.nMax != nOldLen) || (si.nPage != editor->sizeWindow.cy));
 391
 392   if (bScrollY != editor->bScrollY)
 393   {
 394     si.fMask = SIF_RANGE | SIF_PAGE;
 395     si.nMin = 0;
 396     si.nPage = editor->sizeWindow.cy;
 397     if (bScrollY) {
 398       si.nMax = editor->nTotalLength;
 399     } else {
 400       si.nMax = 0;
 401     }
 402     SetScrollInfo(hWnd, SB_VERT, &si, FALSE);
 403     ME_MarkAllForWrapping(editor);
 404     editor->bScrollY = bScrollY;
 405     ME_WrapMarkedParagraphs(editor);
 406     bUpdateScrollBars = TRUE;
 407   }
 408   if (bUpdateScrollBars) {
 409     int nScroll = 0;
 410     si.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;
 411     if (editor->nTotalLength > editor->sizeWindow.cy) {
 412       si.nMax = editor->nTotalLength;
 413       si.nPage = editor->sizeWindow.cy;
 414       if (si.nPos > si.nMax-si.nPage) {
 415         nScroll = (si.nMax-si.nPage)-si.nPos;
 416         si.nPos = si.nMax-si.nPage;
 417       }
 418     }
 419     else {
 420       si.nMax = 0;
 421       si.nPage = 0;
 422       si.nPos = 0;
 423     }
 424     TRACE("min=%d max=%d page=%d pos=%d shift=%d\n", si.nMin, si.nMax, si.nPage, si.nPos, nScroll);
 425     editor->nScrollPosY = si.nPos;
 426     SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
 427     if (nScroll)
 428       ScrollWindow(hWnd, 0, -nScroll, NULL, NULL);
 429   }
 430 }
 431
 432 int ME_GetYScrollPos(ME_TextEditor *editor)
 433 {
 434   return editor->nScrollPosY;
 435 }
 436
 437 void ME_EnsureVisible(ME_TextEditor *editor, ME_DisplayItem *pRun)
 438 {
 439   ME_DisplayItem *pRow = ME_FindItemBack(pRun, diStartRow);
 440   ME_DisplayItem *pPara = ME_FindItemBack(pRun, diParagraph);
 441   int y, yrel, yheight, yold;
 442   HWND hWnd = editor->hWnd;
 443
 444   assert(pRow);
 445   assert(pPara);
 446
 447   y = pPara->member.para.nYPos+pRow->member.row.nYPos;
 448   yheight = pRow->member.row.nHeight;
 449   yold = ME_GetYScrollPos(editor);
 450   yrel = y - yold;
 451   if (yrel < 0) {
 452     editor->nScrollPosY = y;
 453     SetScrollPos(hWnd, SB_VERT, y, TRUE);
 454     if (editor->bRedraw)
 455     {
 456       ScrollWindow(hWnd, 0, -yrel, NULL, NULL);
 457       UpdateWindow(hWnd);
 458     }
 459   } else if (yrel + yheight > editor->sizeWindow.cy) {
 460     int newy = y+yheight-editor->sizeWindow.cy;
 461     editor->nScrollPosY = newy;
 462     SetScrollPos(hWnd, SB_VERT, newy, TRUE);
 463     if (editor->bRedraw)
 464     {
 465       ScrollWindow(hWnd, 0, -(newy-yold), NULL, NULL);
 466       UpdateWindow(hWnd);
 467     }
 468   }
 469 }
 470
 471
 472 void
 473 ME_InvalidateFromOfs(ME_TextEditor *editor, int nCharOfs)
 474 {
 475   RECT rc;
 476   int x, y, height;
 477   ME_Cursor tmp;
 478
 479   ME_RunOfsFromCharOfs(editor, nCharOfs, &tmp.pRun, &tmp.nOffset);
 480   ME_GetCursorCoordinates(editor, &tmp, &x, &y, &height);
 481
 482   rc.left = 0;
 483   rc.top = y;
 484   rc.bottom = y + height;
 485   rc.right = editor->rcFormat.right;
 486   InvalidateRect(editor->hWnd, &rc, FALSE);
 487 }
 488
 489
 490 void
 491 ME_InvalidateSelection(ME_TextEditor *editor)
 492 {
 493   if (ME_IsSelection(editor) || editor->nLastSelStart != editor->nLastSelEnd)
 494   {
 495     int x, y, height;
 496     int x2, y2, height2;
 497     int last_x, last_y, last_height;
 498     int last_x2, last_y2, last_height2;
 499     RECT rc;
 500     ME_Cursor tmp;
 501
 502     ME_GetCursorCoordinates(editor, &editor->pCursors[1], &x, &y, &height);
 503     ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x2, &y2, &height2);
 504     ME_RunOfsFromCharOfs(editor, editor->nLastSelStart, &tmp.pRun, &tmp.nOffset);
 505     ME_GetCursorCoordinates(editor, &tmp, &last_x, &last_y, &last_height);
 506     ME_RunOfsFromCharOfs(editor, editor->nLastSelEnd, &tmp.pRun, &tmp.nOffset);
 507     ME_GetCursorCoordinates(editor, &tmp, &last_x2, &last_y2, &last_height2);
 508     {
 509       rc.left = 0;
 510
 511       rc.top = min(min(y, last_y), min(y2, last_y2));
 512       rc.right = editor->rcFormat.right;
 513       rc.bottom = max(max(y + height, last_y + last_height),
 514                       max(y2 + height2, last_y2 + last_height2));
 515       InvalidateRect(editor->hWnd, &rc, FALSE);
 516     }
 517   }
 518   ME_GetSelection(editor, &editor->nLastSelStart, &editor->nLastSelEnd);
 519 }
 520
 521
 522 void
 523 ME_QueueInvalidateFromCursor(ME_TextEditor *editor, int nCursor)
 524 {
 525   editor->nInvalidOfs = ME_GetCursorOfs(editor, nCursor);
 526 }
 527
 528
 529 BOOL
 530 ME_SetZoom(ME_TextEditor *editor, int numerator, int denominator)
 531 {
 532   /* TODO: Zoom images and objects */
 533
 534   if (numerator != 0)
 535   {
 536     if (denominator == 0)
 537       return FALSE;
 538     if (1.0 / 64.0 > (float)numerator / (float)denominator
 539         || (float)numerator / (float)denominator > 64.0)
 540       return FALSE;
 541   }
 542
 543   editor->nZoomNumerator = numerator;
 544   editor->nZoomDenominator = denominator;
 545
 546   ME_RewrapRepaint(editor);
 547   return TRUE;
 548 }