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 = GetScrollPos(editor->hWnd, SB_VERT);
  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     assert(item->type == diParagraph);
  39     if (!bOnlyNew || (item->member.para.nFlags & MEPF_REPAINT))
  40     {
  41       BOOL bPaint = (rcUpdate == NULL);
  42       if (rcUpdate)
  43         bPaint = c.pt.y<rcUpdate->bottom &&
  44           c.pt.y+item->member.para.nHeight>rcUpdate->top;
  45       if (bPaint)
  46       {
  47         ME_DrawParagraph(&c, item);
  48         item->member.para.nFlags &= ~MEPF_REPAINT;
  49       }
  50     }
  51     c.pt.y += item->member.para.nHeight;
  52     item = item->member.para.next_para;
  53   }
  54   if (c.pt.y<c.rcView.bottom) {
  55     RECT rc;
  56     int xs = c.rcView.left, xe = c.rcView.right;
  57     int ys = c.pt.y, ye = c.rcView.bottom;
  58
  59     if (bOnlyNew)
  60     {
  61       int y1 = editor->nTotalLength-yoffset, y2 = editor->nLastTotalLength-yoffset;
  62       if (y1<y2)
  63         ys = y1, ye = y2+1;
  64       else
  65         ys = ye;
  66     }
  67
  68     if (rcUpdate && ys!=ye)
  69     {
  70       xs = rcUpdate->left, xe = rcUpdate->right;
  71       if (rcUpdate->top > ys)
  72         ys = rcUpdate->top;
  73       if (rcUpdate->bottom < ye)
  74         ye = rcUpdate->bottom;
  75     }
  76
  77     rc.left = xs; /* FIXME remove if it's not necessary anymore */
  78     rc.top = c.pt.y;
  79     rc.right = xe;
  80     rc.bottom = c.pt.y+1;
  81     FillRect(hDC, &rc, (HBRUSH)GetStockObject(BLACK_BRUSH));
  82
  83     if (ys == c.pt.y) /* don't overwrite the top bar */
  84       ys++;
  85     if (ye>ys) {
  86       rc.left = xs;
  87       rc.top = ys;
  88       rc.right = xe;
  89       rc.bottom = ye;
  90       /* this is not supposed to be gray, I know, but lets keep it gray for now for debugging purposes */
  91       FillRect(hDC, &rc, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
  92     }
  93   }
  94   editor->nLastTotalLength = editor->nTotalLength;
  95   ME_DestroyContext(&c);
  96 }
  97
  98 void ME_MarkParagraphRange(ME_TextEditor *editor, ME_DisplayItem *p1,
  99                            ME_DisplayItem *p2, int nFlags)
 100 {
 101   ME_DisplayItem *p3;
 102   if (p1 == p2)
 103   {
 104     p1->member.para.nFlags |= nFlags;
 105     return;
 106   }
 107   if (p1->member.para.nCharOfs > p2->member.para.nCharOfs)
 108     p3 = p1, p1 = p2, p2 = p3;
 109
 110   p1->member.para.nFlags |= nFlags;
 111   do {
 112     p1 = p1->member.para.next_para;
 113     p1->member.para.nFlags |= nFlags;
 114   } while (p1 != p2);
 115 }
 116
 117 void ME_MarkOffsetRange(ME_TextEditor *editor, int from, int to, int nFlags)
 118 {
 119   ME_Cursor c1, c2;
 120   ME_CursorFromCharOfs(editor, from, &c1);
 121   ME_CursorFromCharOfs(editor, to, &c2);
 122
 123   ME_MarkParagraphRange(editor, ME_GetParagraph(c1.pRun), ME_GetParagraph(c2.pRun), nFlags);
 124 }
 125
 126 void ME_MarkSelectionForRepaint(ME_TextEditor *editor)
 127 {
 128   int from, to, from2, to2, end;
 129
 130   end = ME_GetTextLength(editor);
 131   ME_GetSelection(editor, &from, &to);
 132   from2 = editor->nLastSelStart;
 133   to2 = editor->nLastSelEnd;
 134   if (from<from2) ME_MarkOffsetRange(editor, from, from2, MEPF_REPAINT);
 135   if (from>from2) ME_MarkOffsetRange(editor, from2, from, MEPF_REPAINT);
 136   if (to<to2) ME_MarkOffsetRange(editor, to, to2, MEPF_REPAINT);
 137   if (to>to2) ME_MarkOffsetRange(editor, to2, to, MEPF_REPAINT);
 138
 139   editor->nLastSelStart = from;
 140   editor->nLastSelEnd = to;
 141 }
 142
 143 void ME_Repaint(ME_TextEditor *editor)
 144 {
 145   ME_Cursor *pCursor = &editor->pCursors[0];
 146   ME_DisplayItem *pRun = NULL;
 147   int nOffset = -1;
 148   HDC hDC;
 149   int nCharOfs = ME_CharOfsFromRunOfs(editor, pCursor->pRun, pCursor->nOffset);
 150
 151   ME_RunOfsFromCharOfs(editor, nCharOfs, &pRun, &nOffset);
 152   assert(pRun == pCursor->pRun);
 153   assert(nOffset == pCursor->nOffset);
 154   ME_MarkSelectionForRepaint(editor);
 155   ME_WrapMarkedParagraphs(editor);
 156   hDC = GetDC(editor->hWnd);
 157   ME_HideCaret(editor);
 158   ME_PaintContent(editor, hDC, TRUE, NULL);
 159   ReleaseDC(editor->hWnd, hDC);
 160   ME_ShowCaret(editor);
 161 }
 162
 163 void ME_UpdateRepaint(ME_TextEditor *editor)
 164 {
 165 /*
 166   InvalidateRect(editor->hWnd, NULL, TRUE);
 167   */
 168   ME_SendOldNotify(editor, EN_CHANGE);
 169   ME_Repaint(editor);
 170   ME_SendOldNotify(editor, EN_UPDATE);
 171   ME_SendSelChange(editor);
 172 }
 173
 174 void ME_DrawTextWithStyle(ME_Context *c, int x, int y, LPCWSTR szText, int nChars,
 175   ME_Style *s, int *width, int nSelFrom, int nSelTo, int ymin, int cy) {
 176   HDC hDC = c->hDC;
 177   HGDIOBJ hOldFont;
 178   COLORREF rgbOld, rgbBack;
 179   hOldFont = ME_SelectStyleFont(c->editor, hDC, s);
 180   rgbBack = ME_GetBackColor(c->editor);
 181   if ((s->fmt.dwMask & CFM_COLOR) && (s->fmt.dwEffects & CFE_AUTOCOLOR))
 182     rgbOld = SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT));
 183   else
 184     rgbOld = SetTextColor(hDC, s->fmt.crTextColor);
 185   ExtTextOutW(hDC, x, y, 0, NULL, szText, nChars, NULL);
 186   if (width) {
 187     SIZE sz;
 188     GetTextExtentPoint32W(hDC, szText, nChars, &sz);
 189     *width = sz.cx;
 190   }
 191   if (nSelFrom < nChars && nSelTo >= 0 && nSelFrom<nSelTo)
 192   {
 193     SIZE sz;
 194     if (nSelFrom < 0) nSelFrom = 0;
 195     if (nSelTo > nChars) nSelTo = nChars;
 196     GetTextExtentPoint32W(hDC, szText, nSelFrom, &sz);
 197     x += sz.cx;
 198     GetTextExtentPoint32W(hDC, szText+nSelFrom, nSelTo-nSelFrom, &sz);
 199     PatBlt(hDC, x, ymin, sz.cx, cy, DSTINVERT);
 200   }
 201   SetTextColor(hDC, rgbOld);
 202   ME_UnselectStyleFont(c->editor, hDC, s, hOldFont);
 203 }
 204
 205 void ME_DebugWrite(HDC hDC, POINT *pt, WCHAR *szText) {
 206   int align = SetTextAlign(hDC, TA_LEFT|TA_TOP);
 207   HGDIOBJ hFont = SelectObject(hDC, GetStockObject(DEFAULT_GUI_FONT));
 208   COLORREF color = SetTextColor(hDC, RGB(128,128,128));
 209   TextOutW(hDC, pt->x, pt->y, szText, lstrlenW(szText));
 210   SelectObject(hDC, hFont);
 211   SetTextAlign(hDC, align);
 212   SetTextColor(hDC, color);
 213 }
 214
 215 void ME_DrawGraphics(ME_Context *c, int x, int y, ME_Run *run,
 216                      ME_Paragraph *para, BOOL selected) {
 217   SIZE sz;
 218   int xs, ys, xe, ye, h, ym, width, eyes;
 219   ME_GetGraphicsSize(c->editor, run, &sz);
 220   xs = run->pt.x;
 221   ys = y-sz.cy;
 222   xe = xs+sz.cx;
 223   ye = y;
 224   h = ye-ys;
 225   ym = ys+h/4;
 226   width = sz.cx;
 227   eyes = width/8;
 228   /* draw a smiling face :) */
 229   Ellipse(c->hDC, xs, ys, xe, ye);
 230   Ellipse(c->hDC, xs+width/8, ym, x+width/8+eyes, ym+eyes);
 231   Ellipse(c->hDC, xs+7*width/8-eyes, ym, xs+7*width/8, ym+eyes);
 232   MoveToEx(c->hDC, xs+width/8, ys+3*h/4-eyes, NULL);
 233   LineTo(c->hDC, xs+width/8, ys+3*h/4);
 234   LineTo(c->hDC, xs+7*width/8, ys+3*h/4);
 235   LineTo(c->hDC, xs+7*width/8, ys+3*h/4-eyes);
 236   if (selected)
 237   {
 238     /* descent is usually (always?) 0 for graphics */
 239     PatBlt(c->hDC, x, y-run->nAscent, sz.cx, run->nAscent+run->nDescent, DSTINVERT);
 240   }
 241 }
 242
 243 void ME_DrawRun(ME_Context *c, int x, int y, ME_DisplayItem *rundi, ME_Paragraph *para) {
 244   ME_Run *run = &rundi->member.run;
 245   int runofs = run->nCharOfs+para->nCharOfs;
 246
 247   /* you can always comment it out if you need visible paragraph marks */
 248   if (run->nFlags & MERF_ENDPARA)
 249     return;
 250   if (run->nFlags & MERF_GRAPHICS) {
 251     int blfrom, blto;
 252     ME_GetSelection(c->editor, &blfrom, &blto);
 253     ME_DrawGraphics(c, x, y, run, para, (runofs >= blfrom) && (runofs < blto));
 254   } else
 255   {
 256     int blfrom, blto;
 257     ME_DisplayItem *start = ME_FindItemBack(rundi, diStartRow);
 258     ME_GetSelection(c->editor, &blfrom, &blto);
 259
 260     ME_DrawTextWithStyle(c, x, y,
 261       run->strText->szData, ME_StrVLen(run->strText), run->style, NULL,
 262         blfrom-runofs, blto-runofs, c->pt.y+start->member.row.nYPos, start->member.row.nHeight);
 263   }
 264 }
 265
 266 COLORREF ME_GetBackColor(ME_TextEditor *editor)
 267 {
 268 /* Looks like I was seriously confused
 269     return GetSysColor((GetWindowLong(editor->hWnd, GWL_STYLE) & ES_READONLY) ? COLOR_3DFACE: COLOR_WINDOW);
 270 */
 271   if (editor->rgbBackColor == -1)
 272     return GetSysColor(COLOR_WINDOW);
 273   else
 274     return editor->rgbBackColor;
 275 }
 276
 277 void ME_DrawParagraph(ME_Context *c, ME_DisplayItem *paragraph) {
 278   int align = SetTextAlign(c->hDC, TA_BASELINE);
 279   ME_DisplayItem *p;
 280   ME_Run *run;
 281   ME_Paragraph *para = NULL;
 282   RECT rc, rcPara;
 283   int y = c->pt.y;
 284   int height = 0, baseline = 0, no=0, pno = 0;
 285   int xs, xe;
 286   int visible = 0;
 287   int nMargWidth = 0;
 288
 289   c->pt.x = c->rcView.left;
 290   rcPara.left = c->rcView.left;
 291   rcPara.right = c->rcView.right;
 292   for (p = paragraph; p!=paragraph->member.para.next_para; p = p->next) {
 293     switch(p->type) {
 294       case diParagraph:
 295         para = &p->member.para;
 296         break;
 297       case diStartRow:
 298         assert(para);
 299         nMargWidth = (pno==0?para->nFirstMargin:para->nLeftMargin);
 300         xs = c->rcView.left+nMargWidth;
 301         xe = c->rcView.right-para->nRightMargin;
 302         y += height;
 303         rcPara.top = y;
 304         rcPara.bottom = y+p->member.row.nHeight;
 305         visible = RectVisible(c->hDC, &rcPara);
 306         if (visible) {
 307           HBRUSH hbr;
 308           /* left margin */
 309           rc.left = c->rcView.left;
 310           rc.right = c->rcView.left+nMargWidth;
 311           rc.top = y;
 312           rc.bottom = y+p->member.row.nHeight;
 313           FillRect(c->hDC, &rc, c->hbrMargin);
 314           /* right margin */
 315           rc.left = xe;
 316           rc.right = c->rcView.right;
 317           FillRect(c->hDC, &rc, c->hbrMargin);
 318           rc.left = c->rcView.left+para->nLeftMargin;
 319           rc.right = xe;
 320           hbr = CreateSolidBrush(ME_GetBackColor(c->editor));
 321           FillRect(c->hDC, &rc, hbr);
 322           DeleteObject(hbr);
 323         }
 324         if (me_debug)
 325         {
 326           const WCHAR wszRowDebug[] = {'r','o','w','[','%','d',']',0};
 327           WCHAR buf[128];
 328           POINT pt = c->pt;
 329           wsprintfW(buf, wszRowDebug, no);
 330           pt.y = 12+y;
 331           ME_DebugWrite(c->hDC, &pt, buf);
 332         }
 333
 334         height = p->member.row.nHeight;
 335         baseline = p->member.row.nBaseline;
 336         pno++;
 337         break;
 338       case diRun:
 339         assert(para);
 340         run = &p->member.run;
 341         if (visible && me_debug) {
 342           rc.left = c->rcView.left+run->pt.x;
 343           rc.right = c->rcView.left+run->pt.x+run->nWidth;
 344           rc.top = c->pt.y+run->pt.y;
 345           rc.bottom = c->pt.y+run->pt.y+height;
 346           TRACE("rc = (%ld, %ld, %ld, %ld)\n", rc.left, rc.top, rc.right, rc.bottom);
 347           if (run->nFlags & MERF_SKIPPED)
 348             DrawFocusRect(c->hDC, &rc);
 349           else
 350             FrameRect(c->hDC, &rc, GetSysColorBrush(COLOR_GRAYTEXT));
 351         }
 352         if (visible)
 353           ME_DrawRun(c, run->pt.x, c->pt.y+run->pt.y+baseline, p, &paragraph->member.para);
 354         if (me_debug)
 355         {
 356           /* I'm using %ls, hope wsprintfW is not going to use wrong (4-byte) WCHAR version */
 357           const WCHAR wszRunDebug[] = {'[','%','d',':','%','x',']',' ','%','l','s',0};
 358           WCHAR buf[2560];
 359           POINT pt;
 360           pt.x = run->pt.x;
 361           pt.y = c->pt.y + run->pt.y;
 362           wsprintfW(buf, wszRunDebug, no, p->member.run.nFlags, p->member.run.strText->szData);
 363           ME_DebugWrite(c->hDC, &pt, buf);
 364         }
 365         /* c->pt.x += p->member.run.nWidth; */
 366         break;
 367       default:
 368         break;
 369     }
 370     no++;
 371   }
 372   SetTextAlign(c->hDC, align);
 373 }
 374
 375 void ME_UpdateScrollBar(ME_TextEditor *editor, int ypos)
 376 {
 377   float perc = 0.0;
 378   SCROLLINFO si;
 379   HWND hWnd = editor->hWnd;
 380   int overflow = editor->nTotalLength - editor->sizeWindow.cy;
 381   si.cbSize = sizeof(SCROLLINFO);
 382   si.fMask = SIF_PAGE|SIF_POS|SIF_RANGE|SIF_TRACKPOS;
 383   GetScrollInfo(hWnd, SB_VERT, &si);
 384
 385   if (ypos < 0) {
 386     if (si.nMax<1) si.nMax = 1;
 387     perc = 1.0*si.nPos/si.nMax;
 388     ypos = perc*overflow;
 389   }
 390   if (ypos >= overflow && overflow > 0)
 391     ypos = overflow - 1;
 392
 393   if (overflow > 0) {
 394     EnableScrollBar(hWnd, SB_VERT, ESB_ENABLE_BOTH);
 395     SetScrollRange(hWnd, SB_VERT, 0, overflow, FALSE);
 396     SetScrollPos(hWnd, SB_VERT, ypos, TRUE);
 397   } else {
 398     EnableScrollBar(hWnd, SB_VERT, ESB_DISABLE_BOTH);
 399     SetScrollRange(hWnd, SB_VERT, 0, 0, FALSE);
 400     SetScrollPos(hWnd, SB_VERT, 0, TRUE);
 401   }
 402   if (ypos != si.nPos)
 403   {
 404     TRACE("ScrollWindow(%d, %d, %d, %0.4f)\n", si.nPos, si.nMax, ypos, perc);
 405     ScrollWindow(hWnd, 0, si.nPos - ypos, NULL, NULL);
 406     UpdateWindow(hWnd);
 407   }
 408 }
 409
 410 int ME_GetScrollPos(ME_TextEditor *editor)
 411 {
 412   return GetScrollPos(editor->hWnd, SB_VERT);
 413 }
 414
 415 void ME_EnsureVisible(ME_TextEditor *editor, ME_DisplayItem *pRun)
 416 {
 417   ME_DisplayItem *pRow = ME_FindItemBack(pRun, diStartRow);
 418   ME_DisplayItem *pPara = ME_FindItemBack(pRun, diParagraph);
 419   int y, yrel, yheight;
 420
 421   assert(pRow);
 422   assert(pPara);
 423
 424   y = pPara->member.para.nYPos+pRow->member.row.nYPos;
 425   yheight = pRow->member.row.nHeight;
 426   yrel = y - ME_GetScrollPos(editor);
 427   if (yrel < 0)
 428     ME_UpdateScrollBar(editor, y);
 429   else if (yrel + yheight > editor->sizeWindow.cy)
 430   {
 431     ME_UpdateScrollBar(editor, y + yheight - editor->sizeWindow.cy);
 432   }
 433 }