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 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 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 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 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   hOldFont = ME_SelectStyleFont(c->editor, hDC, s);
 182   rgbBack = ME_GetBackColor(c->editor);
 183   if ((s->fmt.dwMask & CFM_COLOR) && (s->fmt.dwEffects & CFE_AUTOCOLOR))
 184     rgbOld = SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT));
 185   else
 186     rgbOld = SetTextColor(hDC, s->fmt.crTextColor);
 187   ExtTextOutW(hDC, x, y, 0, NULL, szText, nChars, NULL);
 188   if (width) {
 189     SIZE sz;
 190     GetTextExtentPoint32W(hDC, szText, nChars, &sz);
 191     *width = sz.cx;
 192   }
 193   if (nSelFrom < nChars && nSelTo >= 0 && nSelFrom<nSelTo)
 194   {
 195     SIZE sz;
 196     if (nSelFrom < 0) nSelFrom = 0;
 197     if (nSelTo > nChars) nSelTo = nChars;
 198     GetTextExtentPoint32W(hDC, szText, nSelFrom, &sz);
 199     x += sz.cx;
 200     GetTextExtentPoint32W(hDC, szText+nSelFrom, nSelTo-nSelFrom, &sz);
 201     PatBlt(hDC, x, ymin, sz.cx, cy, DSTINVERT);
 202   }
 203   SetTextColor(hDC, rgbOld);
 204   ME_UnselectStyleFont(c->editor, hDC, s, hOldFont);
 205 }
 206
 207 void ME_DebugWrite(HDC hDC, POINT *pt, WCHAR *szText) {
 208   int align = SetTextAlign(hDC, TA_LEFT|TA_TOP);
 209   HGDIOBJ hFont = SelectObject(hDC, GetStockObject(DEFAULT_GUI_FONT));
 210   COLORREF color = SetTextColor(hDC, RGB(128,128,128));
 211   TextOutW(hDC, pt->x, pt->y, szText, lstrlenW(szText));
 212   SelectObject(hDC, hFont);
 213   SetTextAlign(hDC, align);
 214   SetTextColor(hDC, color);
 215 }
 216
 217 void ME_DrawGraphics(ME_Context *c, int x, int y, ME_Run *run,
 218                      ME_Paragraph *para, BOOL selected) {
 219   SIZE sz;
 220   int xs, ys, xe, ye, h, ym, width, eyes;
 221   ME_GetGraphicsSize(c->editor, run, &sz);
 222   xs = run->pt.x;
 223   ys = y-sz.cy;
 224   xe = xs+sz.cx;
 225   ye = y;
 226   h = ye-ys;
 227   ym = ys+h/4;
 228   width = sz.cx;
 229   eyes = width/8;
 230   /* draw a smiling face :) */
 231   Ellipse(c->hDC, xs, ys, xe, ye);
 232   Ellipse(c->hDC, xs+width/8, ym, x+width/8+eyes, ym+eyes);
 233   Ellipse(c->hDC, xs+7*width/8-eyes, ym, xs+7*width/8, ym+eyes);
 234   MoveToEx(c->hDC, xs+width/8, ys+3*h/4-eyes, NULL);
 235   LineTo(c->hDC, xs+width/8, ys+3*h/4);
 236   LineTo(c->hDC, xs+7*width/8, ys+3*h/4);
 237   LineTo(c->hDC, xs+7*width/8, ys+3*h/4-eyes);
 238   if (selected)
 239   {
 240     /* descent is usually (always?) 0 for graphics */
 241     PatBlt(c->hDC, x, y-run->nAscent, sz.cx, run->nAscent+run->nDescent, DSTINVERT);
 242   }
 243 }
 244
 245 void ME_DrawRun(ME_Context *c, int x, int y, ME_DisplayItem *rundi, ME_Paragraph *para) {
 246   ME_Run *run = &rundi->member.run;
 247   int runofs = run->nCharOfs+para->nCharOfs;
 248
 249   /* you can always comment it out if you need visible paragraph marks */
 250   if (run->nFlags & (MERF_ENDPARA|MERF_TAB))
 251     return;
 252   if (run->nFlags & MERF_GRAPHICS) {
 253     int blfrom, blto;
 254     ME_GetSelection(c->editor, &blfrom, &blto);
 255     ME_DrawGraphics(c, x, y, run, para, (runofs >= blfrom) && (runofs < blto));
 256   } else
 257   {
 258     int blfrom, blto;
 259     ME_DisplayItem *start = ME_FindItemBack(rundi, diStartRow);
 260     ME_GetSelection(c->editor, &blfrom, &blto);
 261
 262     ME_DrawTextWithStyle(c, x, y,
 263       run->strText->szData, ME_StrVLen(run->strText), run->style, NULL,
 264         blfrom-runofs, blto-runofs, c->pt.y+start->member.row.nYPos, start->member.row.nHeight);
 265   }
 266 }
 267
 268 COLORREF ME_GetBackColor(ME_TextEditor *editor)
 269 {
 270 /* Looks like I was seriously confused
 271     return GetSysColor((GetWindowLong(editor->hWnd, GWL_STYLE) & ES_READONLY) ? COLOR_3DFACE: COLOR_WINDOW);
 272 */
 273   if (editor->rgbBackColor == -1)
 274     return GetSysColor(COLOR_WINDOW);
 275   else
 276     return editor->rgbBackColor;
 277 }
 278
 279 void ME_DrawParagraph(ME_Context *c, ME_DisplayItem *paragraph) {
 280   int align = SetTextAlign(c->hDC, TA_BASELINE);
 281   ME_DisplayItem *p;
 282   ME_Run *run;
 283   ME_Paragraph *para = NULL;
 284   RECT rc, rcPara;
 285   int y = c->pt.y;
 286   int height = 0, baseline = 0, no=0, pno = 0;
 287   int xs, xe;
 288   int visible = 0;
 289   int nMargWidth = 0;
 290
 291   c->pt.x = c->rcView.left;
 292   rcPara.left = c->rcView.left;
 293   rcPara.right = c->rcView.right;
 294   for (p = paragraph; p!=paragraph->member.para.next_para; p = p->next) {
 295     switch(p->type) {
 296       case diParagraph:
 297         para = &p->member.para;
 298         break;
 299       case diStartRow:
 300         assert(para);
 301         nMargWidth = (pno==0?para->nFirstMargin:para->nLeftMargin);
 302         xs = c->rcView.left+nMargWidth;
 303         xe = c->rcView.right-para->nRightMargin;
 304         y += height;
 305         rcPara.top = y;
 306         rcPara.bottom = y+p->member.row.nHeight;
 307         visible = RectVisible(c->hDC, &rcPara);
 308         if (visible) {
 309           HBRUSH hbr;
 310           hbr = CreateSolidBrush(ME_GetBackColor(c->editor));
 311           /* left margin */
 312           rc.left = c->rcView.left;
 313           rc.right = c->rcView.left+nMargWidth;
 314           rc.top = y;
 315           rc.bottom = y+p->member.row.nHeight;
 316           FillRect(c->hDC, &rc, hbr/* c->hbrMargin */);
 317           /* right margin */
 318           rc.left = xe;
 319           rc.right = c->rcView.right;
 320           FillRect(c->hDC, &rc, hbr/* c->hbrMargin */);
 321           rc.left = c->rcView.left+nMargWidth;
 322           rc.right = xe;
 323           FillRect(c->hDC, &rc, hbr);
 324           DeleteObject(hbr);
 325         }
 326         if (me_debug)
 327         {
 328           const WCHAR wszRowDebug[] = {'r','o','w','[','%','d',']',0};
 329           WCHAR buf[128];
 330           POINT pt = c->pt;
 331           wsprintfW(buf, wszRowDebug, no);
 332           pt.y = 12+y;
 333           ME_DebugWrite(c->hDC, &pt, buf);
 334         }
 335
 336         height = p->member.row.nHeight;
 337         baseline = p->member.row.nBaseline;
 338         pno++;
 339         break;
 340       case diRun:
 341         assert(para);
 342         run = &p->member.run;
 343         if (visible && me_debug) {
 344           rc.left = c->rcView.left+run->pt.x;
 345           rc.right = c->rcView.left+run->pt.x+run->nWidth;
 346           rc.top = c->pt.y+run->pt.y;
 347           rc.bottom = c->pt.y+run->pt.y+height;
 348           TRACE("rc = (%ld, %ld, %ld, %ld)\n", rc.left, rc.top, rc.right, rc.bottom);
 349           if (run->nFlags & MERF_SKIPPED)
 350             DrawFocusRect(c->hDC, &rc);
 351           else
 352             FrameRect(c->hDC, &rc, GetSysColorBrush(COLOR_GRAYTEXT));
 353         }
 354         if (visible)
 355           ME_DrawRun(c, run->pt.x, c->pt.y+run->pt.y+baseline, p, &paragraph->member.para);
 356         if (me_debug)
 357         {
 358           /* I'm using %ls, hope wsprintfW is not going to use wrong (4-byte) WCHAR version */
 359           const WCHAR wszRunDebug[] = {'[','%','d',':','%','x',']',' ','%','l','s',0};
 360           WCHAR buf[2560];
 361           POINT pt;
 362           pt.x = run->pt.x;
 363           pt.y = c->pt.y + run->pt.y;
 364           wsprintfW(buf, wszRunDebug, no, p->member.run.nFlags, p->member.run.strText->szData);
 365           ME_DebugWrite(c->hDC, &pt, buf);
 366         }
 367         /* c->pt.x += p->member.run.nWidth; */
 368         break;
 369       default:
 370         break;
 371     }
 372     no++;
 373   }
 374   SetTextAlign(c->hDC, align);
 375 }
 376
 377 void ME_Scroll(ME_TextEditor *editor, int cx, int cy)
 378 {
 379   SCROLLINFO si;
 380   HWND hWnd = editor->hWnd;
 381
 382   si.cbSize = sizeof(SCROLLINFO);
 383   si.fMask = SIF_POS;
 384   GetScrollInfo(hWnd, SB_VERT, &si);
 385   si.nPos = editor->nScrollPosY -= cy;
 386   SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
 387   if (abs(cy) > editor->sizeWindow.cy)
 388     InvalidateRect(editor->hWnd, NULL, TRUE);
 389   else
 390     ScrollWindowEx(hWnd, cx, cy, NULL, NULL, NULL, NULL, SW_ERASE|SW_INVALIDATE);
 391 }
 392
 393 void ME_UpdateScrollBar(ME_TextEditor *editor)
 394 {
 395   HWND hWnd = editor->hWnd;
 396   SCROLLINFO si;
 397   int nOldLen = editor->nTotalLength;
 398   BOOL bScrollY = (editor->nTotalLength > editor->sizeWindow.cy);
 399   BOOL bUpdateScrollBars;
 400   si.cbSize = sizeof(si);
 401   si.fMask = SIF_POS | SIF_RANGE;
 402   GetScrollInfo(hWnd, SB_VERT, &si);
 403   bUpdateScrollBars = (bScrollY || editor->bScrollY)&& ((si.nMax != nOldLen) || (si.nPage != editor->sizeWindow.cy));
 404
 405   if (bScrollY != editor->bScrollY)
 406   {
 407     si.fMask = SIF_RANGE | SIF_PAGE;
 408     si.nMin = 0;
 409     si.nPage = editor->sizeWindow.cy;
 410     if (bScrollY) {
 411       si.nMax = editor->nTotalLength;
 412     } else {
 413       si.nMax = 0;
 414     }
 415     SetScrollInfo(hWnd, SB_VERT, &si, FALSE);
 416     ME_MarkAllForWrapping(editor);
 417     editor->bScrollY = bScrollY;
 418     ME_WrapMarkedParagraphs(editor);
 419     bUpdateScrollBars = TRUE;
 420   }
 421   if (bUpdateScrollBars) {
 422     int nScroll = 0;
 423     si.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;
 424     if (editor->nTotalLength > editor->sizeWindow.cy) {
 425       si.nMax = editor->nTotalLength;
 426       si.nPage = editor->sizeWindow.cy;
 427       if (si.nPos > si.nMax-si.nPage) {
 428         nScroll = (si.nMax-si.nPage)-si.nPos;
 429         si.nPos = si.nMax-si.nPage;
 430       }
 431     }
 432     else {
 433       si.nMax = 0;
 434       si.nPage = 0;
 435       si.nPos = 0;
 436     }
 437     TRACE("min=%d max=%d page=%d pos=%d shift=%d\n", si.nMin, si.nMax, si.nPage, si.nPos, nScroll);
 438     editor->nScrollPosY = si.nPos;
 439     SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
 440     if (nScroll)
 441       ScrollWindow(hWnd, 0, -nScroll, NULL, NULL);
 442   }
 443 }
 444
 445 int ME_GetYScrollPos(ME_TextEditor *editor)
 446 {
 447   return editor->nScrollPosY;
 448 }
 449
 450 void ME_EnsureVisible(ME_TextEditor *editor, ME_DisplayItem *pRun)
 451 {
 452   ME_DisplayItem *pRow = ME_FindItemBack(pRun, diStartRow);
 453   ME_DisplayItem *pPara = ME_FindItemBack(pRun, diParagraph);
 454   int y, yrel, yheight, yold;
 455   HWND hWnd = editor->hWnd;
 456
 457   assert(pRow);
 458   assert(pPara);
 459
 460   y = pPara->member.para.nYPos+pRow->member.row.nYPos;
 461   yheight = pRow->member.row.nHeight;
 462   yold = ME_GetYScrollPos(editor);
 463   yrel = y - yold;
 464   if (yrel < 0) {
 465     editor->nScrollPosY = y;
 466     SetScrollPos(hWnd, SB_VERT, y, TRUE);
 467     ScrollWindow(hWnd, 0, -yrel, NULL, NULL);
 468     UpdateWindow(hWnd);
 469   } else if (yrel + yheight > editor->sizeWindow.cy) {
 470     int newy = y+yheight-editor->sizeWindow.cy;
 471     editor->nScrollPosY = newy;
 472     SetScrollPos(hWnd, SB_VERT, newy, TRUE);
 473     ScrollWindow(hWnd, 0, -(newy-yold), NULL, NULL);
 474     UpdateWindow(hWnd);
 475   }
 476 }