dlls/riched20/paint.c

   1 /*
   2  * RichEdit - painting functions
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "editor.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(richedit);
  24
  25 void ME_PaintContent(ME_TextEditor *editor, HDC hDC, BOOL bOnlyNew, RECT *rcUpdate) {
  26   ME_DisplayItem *item;
  27   ME_Context c;
  28   int yoffset;
  29
  30   editor->nSequence++;
  31   yoffset = ME_GetYScrollPos(editor);
  32   ME_InitContext(&c, editor, hDC);
  33   SetBkMode(hDC, TRANSPARENT);
  34   ME_MoveCaret(editor);
  35   item = editor->pBuffer->pFirst->next;
  36   c.pt.y -= yoffset;
  37   while(item != editor->pBuffer->pLast) {
  38     int ye;
  39     assert(item->type == diParagraph);
  40     ye = c.pt.y + item->member.para.nHeight;
  41     if (!bOnlyNew || (item->member.para.nFlags & MEPF_REPAINT))
  42     {
  43       BOOL bPaint = (rcUpdate == NULL);
  44       if (rcUpdate)
  45         bPaint = c.pt.y<rcUpdate->bottom &&
  46           c.pt.y+item->member.para.nHeight>rcUpdate->top;
  47       if (bPaint)
  48       {
  49         ME_DrawParagraph(&c, item);
  50         if (!rcUpdate || (rcUpdate->top<=c.pt.y && rcUpdate->bottom>=ye))
  51           item->member.para.nFlags &= ~MEPF_REPAINT;
  52       }
  53     }
  54     c.pt.y = ye;
  55     item = item->member.para.next_para;
  56   }
  57   if (c.pt.y<c.rcView.bottom) {
  58     RECT rc;
  59     int xs = c.rcView.left, xe = c.rcView.right;
  60     int ys = c.pt.y, ye = c.rcView.bottom;
  61
  62     if (bOnlyNew)
  63     {
  64       int y1 = editor->nTotalLength-yoffset, y2 = editor->nLastTotalLength-yoffset;
  65       if (y1<y2)
  66         ys = y1, ye = y2+1;
  67       else
  68         ys = ye;
  69     }
  70
  71     if (rcUpdate && ys!=ye)
  72     {
  73       xs = rcUpdate->left, xe = rcUpdate->right;
  74       if (rcUpdate->top > ys)
  75         ys = rcUpdate->top;
  76       if (rcUpdate->bottom < ye)
  77         ye = rcUpdate->bottom;
  78     }
  79
  80     if (ye>ys) {
  81       HBRUSH hbr;
  82       hbr = CreateSolidBrush(ME_GetBackColor(c.editor));
  83       rc.left = xs;
  84       rc.top = ys;
  85       rc.right = xe;
  86       rc.bottom = ye;
  87       FillRect(hDC, &rc, hbr);
  88       DeleteObject(hbr);
  89     }
  90     if (ys == c.pt.y) /* don't overwrite the top bar */
  91       ys++;
  92   }
  93   editor->nLastTotalLength = editor->nTotalLength;
  94   ME_DestroyContext(&c);
  95 }
  96
  97 static void ME_MarkParagraphRange(ME_TextEditor *editor, ME_DisplayItem *p1,
  98                            ME_DisplayItem *p2, int nFlags)
  99 {
 100   ME_DisplayItem *p3;
 101   if (p1 == p2)
 102   {
 103     p1->member.para.nFlags |= nFlags;
 104     return;
 105   }
 106   if (p1->member.para.nCharOfs > p2->member.para.nCharOfs)
 107     p3 = p1, p1 = p2, p2 = p3;
 108
 109   p1->member.para.nFlags |= nFlags;
 110   do {
 111     p1 = p1->member.para.next_para;
 112     p1->member.para.nFlags |= nFlags;
 113   } while (p1 != p2);
 114 }
 115
 116 static void ME_MarkOffsetRange(ME_TextEditor *editor, int from, int to, int nFlags)
 117 {
 118   ME_Cursor c1, c2;
 119   ME_CursorFromCharOfs(editor, from, &c1);
 120   ME_CursorFromCharOfs(editor, to, &c2);
 121
 122   ME_MarkParagraphRange(editor, ME_GetParagraph(c1.pRun), ME_GetParagraph(c2.pRun), nFlags);
 123 }
 124
 125 static void ME_MarkSelectionForRepaint(ME_TextEditor *editor)
 126 {
 127   int from, to, from2, to2, end;
 128
 129   end = ME_GetTextLength(editor);
 130   ME_GetSelection(editor, &from, &to);
 131   from2 = editor->nLastSelStart;
 132   to2 = editor->nLastSelEnd;
 133   if (from<from2) ME_MarkOffsetRange(editor, from, from2, MEPF_REPAINT);
 134   if (from>from2) ME_MarkOffsetRange(editor, from2, from, MEPF_REPAINT);
 135   if (to<to2) ME_MarkOffsetRange(editor, to, to2, MEPF_REPAINT);
 136   if (to>to2) ME_MarkOffsetRange(editor, to2, to, MEPF_REPAINT);
 137
 138   editor->nLastSelStart = from;
 139   editor->nLastSelEnd = to;
 140 }
 141
 142 void ME_Repaint(ME_TextEditor *editor)
 143 {
 144   ME_Cursor *pCursor = &editor->pCursors[0];
 145   ME_DisplayItem *pRun = NULL;
 146   int nOffset = -1;
 147   HDC hDC;
 148   int nCharOfs = ME_CharOfsFromRunOfs(editor, pCursor->pRun, pCursor->nOffset);
 149
 150   ME_RunOfsFromCharOfs(editor, nCharOfs, &pRun, &nOffset);
 151   assert(pRun == pCursor->pRun);
 152   assert(nOffset == pCursor->nOffset);
 153   ME_MarkSelectionForRepaint(editor);
 154   if (ME_WrapMarkedParagraphs(editor)) {
 155     ME_UpdateScrollBar(editor);
 156   }
 157   hDC = GetDC(editor->hWnd);
 158   ME_HideCaret(editor);
 159   ME_PaintContent(editor, hDC, TRUE, NULL);
 160   ReleaseDC(editor->hWnd, hDC);
 161   ME_ShowCaret(editor);
 162   ME_EnsureVisible(editor, pCursor->pRun);
 163 }
 164
 165 void ME_UpdateRepaint(ME_TextEditor *editor)
 166 {
 167 /*
 168   InvalidateRect(editor->hWnd, NULL, TRUE);
 169   */
 170   ME_SendOldNotify(editor, EN_CHANGE);
 171   ME_Repaint(editor);
 172   ME_SendOldNotify(editor, EN_UPDATE);
 173   ME_SendSelChange(editor);
 174 }
 175
 176 static void ME_DrawTextWithStyle(ME_Context *c, int x, int y, LPCWSTR szText, int nChars,
 177   ME_Style *s, int *width, int nSelFrom, int nSelTo, int ymin, int cy) {
 178   HDC hDC = c->hDC;
 179   HGDIOBJ hOldFont;
 180   COLORREF rgbOld, rgbBack;
 181   int yOffset = 0, yTwipsOffset = 0;
 182   hOldFont = ME_SelectStyleFont(c->editor, hDC, s);
 183   rgbBack = ME_GetBackColor(c->editor);
 184   if ((s->fmt.dwMask & CFM_COLOR) && (s->fmt.dwEffects & CFE_AUTOCOLOR))
 185     rgbOld = SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT));
 186   else
 187     rgbOld = SetTextColor(hDC, s->fmt.crTextColor);
 188   if ((s->fmt.dwMask & s->fmt.dwEffects) & CFM_OFFSET) {
 189     yTwipsOffset = s->fmt.yOffset;
 190   }
 191   if ((s->fmt.dwMask & s->fmt.dwEffects) & (CFM_SUPERSCRIPT | CFM_SUBSCRIPT)) {
 192     if (s->fmt.dwEffects & CFE_SUPERSCRIPT) yTwipsOffset = s->fmt.yHeight/3;
 193     if (s->fmt.dwEffects & CFE_SUBSCRIPT) yTwipsOffset = -s->fmt.yHeight/12;
 194   }
 195   if (yTwipsOffset)
 196     yOffset = yTwipsOffset*GetDeviceCaps(hDC, LOGPIXELSY)/1440;
 197   ExtTextOutW(hDC, x, y-yOffset, 0, NULL, szText, nChars, NULL);
 198   if (width) {
 199     SIZE sz;
 200     GetTextExtentPoint32W(hDC, szText, nChars, &sz);
 201     *width = sz.cx;
 202   }
 203   if (nSelFrom < nChars && nSelTo >= 0 && nSelFrom<nSelTo)
 204   {
 205     SIZE sz;
 206     if (nSelFrom < 0) nSelFrom = 0;
 207     if (nSelTo > nChars) nSelTo = nChars;
 208     GetTextExtentPoint32W(hDC, szText, nSelFrom, &sz);
 209     x += sz.cx;
 210     GetTextExtentPoint32W(hDC, szText+nSelFrom, nSelTo-nSelFrom, &sz);
 211     PatBlt(hDC, x, ymin, sz.cx, cy, DSTINVERT);
 212   }
 213   SetTextColor(hDC, rgbOld);
 214   ME_UnselectStyleFont(c->editor, hDC, s, hOldFont);
 215 }
 216
 217 static void ME_DebugWrite(HDC hDC, POINT *pt, WCHAR *szText) {
 218   int align = SetTextAlign(hDC, TA_LEFT|TA_TOP);
 219   HGDIOBJ hFont = SelectObject(hDC, GetStockObject(DEFAULT_GUI_FONT));
 220   COLORREF color = SetTextColor(hDC, RGB(128,128,128));
 221   TextOutW(hDC, pt->x, pt->y, szText, lstrlenW(szText));
 222   SelectObject(hDC, hFont);
 223   SetTextAlign(hDC, align);
 224   SetTextColor(hDC, color);
 225 }
 226
 227 void ME_DrawGraphics(ME_Context *c, int x, int y, ME_Run *run,
 228                      ME_Paragraph *para, BOOL selected) {
 229   SIZE sz;
 230   int xs, ys, xe, ye, h, ym, width, eyes;
 231   ME_GetGraphicsSize(c->editor, run, &sz);
 232   xs = run->pt.x;
 233   ys = y-sz.cy;
 234   xe = xs+sz.cx;
 235   ye = y;
 236   h = ye-ys;
 237   ym = ys+h/4;
 238   width = sz.cx;
 239   eyes = width/8;
 240   /* draw a smiling face :) */
 241   Ellipse(c->hDC, xs, ys, xe, ye);
 242   Ellipse(c->hDC, xs+width/8, ym, x+width/8+eyes, ym+eyes);
 243   Ellipse(c->hDC, xs+7*width/8-eyes, ym, xs+7*width/8, ym+eyes);
 244   MoveToEx(c->hDC, xs+width/8, ys+3*h/4-eyes, NULL);
 245   LineTo(c->hDC, xs+width/8, ys+3*h/4);
 246   LineTo(c->hDC, xs+7*width/8, ys+3*h/4);
 247   LineTo(c->hDC, xs+7*width/8, ys+3*h/4-eyes);
 248   if (selected)
 249   {
 250     /* descent is usually (always?) 0 for graphics */
 251     PatBlt(c->hDC, x, y-run->nAscent, sz.cx, run->nAscent+run->nDescent, DSTINVERT);
 252   }
 253 }
 254
 255 static void ME_DrawRun(ME_Context *c, int x, int y, ME_DisplayItem *rundi, ME_Paragraph *para) {
 256   ME_Run *run = &rundi->member.run;
 257   int runofs = run->nCharOfs+para->nCharOfs;
 258
 259   /* you can always comment it out if you need visible paragraph marks */
 260   if (run->nFlags & (MERF_ENDPARA|MERF_TAB))
 261     return;
 262   if (run->nFlags & MERF_GRAPHICS) {
 263     int blfrom, blto;
 264     ME_GetSelection(c->editor, &blfrom, &blto);
 265     ME_DrawGraphics(c, x, y, run, para, (runofs >= blfrom) && (runofs < blto));
 266   } else
 267   {
 268     int blfrom, blto;
 269     ME_DisplayItem *start = ME_FindItemBack(rundi, diStartRow);
 270     ME_GetSelection(c->editor, &blfrom, &blto);
 271
 272     ME_DrawTextWithStyle(c, x, y,
 273       run->strText->szData, ME_StrVLen(run->strText), run->style, NULL,
 274         blfrom-runofs, blto-runofs, c->pt.y+start->member.row.nYPos, start->member.row.nHeight);
 275   }
 276 }
 277
 278 COLORREF ME_GetBackColor(ME_TextEditor *editor)
 279 {
 280 /* Looks like I was seriously confused
 281     return GetSysColor((GetWindowLong(editor->hWnd, GWL_STYLE) & ES_READONLY) ? COLOR_3DFACE: COLOR_WINDOW);
 282 */
 283   if (editor->rgbBackColor == -1)
 284     return GetSysColor(COLOR_WINDOW);
 285   else
 286     return editor->rgbBackColor;
 287 }
 288
 289 void ME_DrawParagraph(ME_Context *c, ME_DisplayItem *paragraph) {
 290   int align = SetTextAlign(c->hDC, TA_BASELINE);
 291   ME_DisplayItem *p;
 292   ME_Run *run;
 293   ME_Paragraph *para = NULL;
 294   RECT rc, rcPara;
 295   int y = c->pt.y;
 296   int height = 0, baseline = 0, no=0, pno = 0;
 297   int xs, xe;
 298   int visible = 0;
 299   int nMargWidth = 0;
 300
 301   c->pt.x = c->rcView.left;
 302   rcPara.left = c->rcView.left;
 303   rcPara.right = c->rcView.right;
 304   for (p = paragraph; p!=paragraph->member.para.next_para; p = p->next) {
 305     switch(p->type) {
 306       case diParagraph:
 307         para = &p->member.para;
 308         break;
 309       case diStartRow:
 310         assert(para);
 311         nMargWidth = (pno==0?para->nFirstMargin:para->nLeftMargin);
 312         xs = c->rcView.left+nMargWidth;
 313         xe = c->rcView.right-para->nRightMargin;
 314         y += height;
 315         rcPara.top = y;
 316         rcPara.bottom = y+p->member.row.nHeight;
 317         visible = RectVisible(c->hDC, &rcPara);
 318         if (visible) {
 319           HBRUSH hbr;
 320           hbr = CreateSolidBrush(ME_GetBackColor(c->editor));
 321           /* left margin */
 322           rc.left = c->rcView.left;
 323           rc.right = c->rcView.left+nMargWidth;
 324           rc.top = y;
 325           rc.bottom = y+p->member.row.nHeight;
 326           FillRect(c->hDC, &rc, hbr/* c->hbrMargin */);
 327           /* right margin */
 328           rc.left = xe;
 329           rc.right = c->rcView.right;
 330           FillRect(c->hDC, &rc, hbr/* c->hbrMargin */);
 331           rc.left = c->rcView.left+nMargWidth;
 332           rc.right = xe;
 333           FillRect(c->hDC, &rc, hbr);
 334           DeleteObject(hbr);
 335         }
 336         if (me_debug)
 337         {
 338           const WCHAR wszRowDebug[] = {'r','o','w','[','%','d',']',0};
 339           WCHAR buf[128];
 340           POINT pt = c->pt;
 341           wsprintfW(buf, wszRowDebug, no);
 342           pt.y = 12+y;
 343           ME_DebugWrite(c->hDC, &pt, buf);
 344         }
 345
 346         height = p->member.row.nHeight;
 347         baseline = p->member.row.nBaseline;
 348         pno++;
 349         break;
 350       case diRun:
 351         assert(para);
 352         run = &p->member.run;
 353         if (visible && me_debug) {
 354           rc.left = c->rcView.left+run->pt.x;
 355           rc.right = c->rcView.left+run->pt.x+run->nWidth;
 356           rc.top = c->pt.y+run->pt.y;
 357           rc.bottom = c->pt.y+run->pt.y+height;
 358           TRACE("rc = (%ld, %ld, %ld, %ld)\n", rc.left, rc.top, rc.right, rc.bottom);
 359           if (run->nFlags & MERF_SKIPPED)
 360             DrawFocusRect(c->hDC, &rc);
 361           else
 362             FrameRect(c->hDC, &rc, GetSysColorBrush(COLOR_GRAYTEXT));
 363         }
 364         if (visible)
 365           ME_DrawRun(c, run->pt.x, c->pt.y+run->pt.y+baseline, p, &paragraph->member.para);
 366         if (me_debug)
 367         {
 368           /* I'm using %ls, hope wsprintfW is not going to use wrong (4-byte) WCHAR version */
 369           const WCHAR wszRunDebug[] = {'[','%','d',':','%','x',']',' ','%','l','s',0};
 370           WCHAR buf[2560];
 371           POINT pt;
 372           pt.x = run->pt.x;
 373           pt.y = c->pt.y + run->pt.y;
 374           wsprintfW(buf, wszRunDebug, no, p->member.run.nFlags, p->member.run.strText->szData);
 375           ME_DebugWrite(c->hDC, &pt, buf);
 376         }
 377         /* c->pt.x += p->member.run.nWidth; */
 378         break;
 379       default:
 380         break;
 381     }
 382     no++;
 383   }
 384   SetTextAlign(c->hDC, align);
 385 }
 386
 387 void ME_Scroll(ME_TextEditor *editor, int cx, int cy)
 388 {
 389   SCROLLINFO si;
 390   HWND hWnd = editor->hWnd;
 391
 392   si.cbSize = sizeof(SCROLLINFO);
 393   si.fMask = SIF_POS;
 394   GetScrollInfo(hWnd, SB_VERT, &si);
 395   si.nPos = editor->nScrollPosY -= cy;
 396   SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
 397   if (abs(cy) > editor->sizeWindow.cy)
 398     InvalidateRect(editor->hWnd, NULL, TRUE);
 399   else
 400     ScrollWindowEx(hWnd, cx, cy, NULL, NULL, NULL, NULL, SW_ERASE|SW_INVALIDATE);
 401 }
 402
 403 void ME_UpdateScrollBar(ME_TextEditor *editor)
 404 {
 405   HWND hWnd = editor->hWnd;
 406   SCROLLINFO si;
 407   int nOldLen = editor->nTotalLength;
 408   BOOL bScrollY = (editor->nTotalLength > editor->sizeWindow.cy);
 409   BOOL bUpdateScrollBars;
 410   si.cbSize = sizeof(si);
 411   si.fMask = SIF_POS | SIF_RANGE;
 412   GetScrollInfo(hWnd, SB_VERT, &si);
 413   bUpdateScrollBars = (bScrollY || editor->bScrollY)&& ((si.nMax != nOldLen) || (si.nPage != editor->sizeWindow.cy));
 414
 415   if (bScrollY != editor->bScrollY)
 416   {
 417     si.fMask = SIF_RANGE | SIF_PAGE;
 418     si.nMin = 0;
 419     si.nPage = editor->sizeWindow.cy;
 420     if (bScrollY) {
 421       si.nMax = editor->nTotalLength;
 422     } else {
 423       si.nMax = 0;
 424     }
 425     SetScrollInfo(hWnd, SB_VERT, &si, FALSE);
 426     ME_MarkAllForWrapping(editor);
 427     editor->bScrollY = bScrollY;
 428     ME_WrapMarkedParagraphs(editor);
 429     bUpdateScrollBars = TRUE;
 430   }
 431   if (bUpdateScrollBars) {
 432     int nScroll = 0;
 433     si.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;
 434     if (editor->nTotalLength > editor->sizeWindow.cy) {
 435       si.nMax = editor->nTotalLength;
 436       si.nPage = editor->sizeWindow.cy;
 437       if (si.nPos > si.nMax-si.nPage) {
 438         nScroll = (si.nMax-si.nPage)-si.nPos;
 439         si.nPos = si.nMax-si.nPage;
 440       }
 441     }
 442     else {
 443       si.nMax = 0;
 444       si.nPage = 0;
 445       si.nPos = 0;
 446     }
 447     TRACE("min=%d max=%d page=%d pos=%d shift=%d\n", si.nMin, si.nMax, si.nPage, si.nPos, nScroll);
 448     editor->nScrollPosY = si.nPos;
 449     SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
 450     if (nScroll)
 451       ScrollWindow(hWnd, 0, -nScroll, NULL, NULL);
 452   }
 453 }
 454
 455 int ME_GetYScrollPos(ME_TextEditor *editor)
 456 {
 457   return editor->nScrollPosY;
 458 }
 459
 460 void ME_EnsureVisible(ME_TextEditor *editor, ME_DisplayItem *pRun)
 461 {
 462   ME_DisplayItem *pRow = ME_FindItemBack(pRun, diStartRow);
 463   ME_DisplayItem *pPara = ME_FindItemBack(pRun, diParagraph);
 464   int y, yrel, yheight, yold;
 465   HWND hWnd = editor->hWnd;
 466
 467   assert(pRow);
 468   assert(pPara);
 469
 470   y = pPara->member.para.nYPos+pRow->member.row.nYPos;
 471   yheight = pRow->member.row.nHeight;
 472   yold = ME_GetYScrollPos(editor);
 473   yrel = y - yold;
 474   if (yrel < 0) {
 475     editor->nScrollPosY = y;
 476     SetScrollPos(hWnd, SB_VERT, y, TRUE);
 477     ScrollWindow(hWnd, 0, -yrel, NULL, NULL);
 478     UpdateWindow(hWnd);
 479   } else if (yrel + yheight > editor->sizeWindow.cy) {
 480     int newy = y+yheight-editor->sizeWindow.cy;
 481     editor->nScrollPosY = newy;
 482     SetScrollPos(hWnd, SB_VERT, newy, TRUE);
 483     ScrollWindow(hWnd, 0, -(newy-yold), NULL, NULL);
 484     UpdateWindow(hWnd);
 485   }
 486 }