348 lines
11 KiB
C
348 lines
11 KiB
C
/*
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* RichEdit - painting functions
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*
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* Copyright 2004 by Krzysztof Foltman
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "editor.h"
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WINE_DEFAULT_DEBUG_CHANNEL(richedit);
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void ME_PaintContent(ME_TextEditor *editor, HDC hDC, BOOL bOnlyNew) {
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ME_DisplayItem *item;
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ME_Context c;
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editor->nSequence++;
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ME_InitContext(&c, editor, hDC);
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SetBkMode(hDC, TRANSPARENT);
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ME_MoveCaret(editor);
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item = editor->pBuffer->pFirst->next;
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c.pt.y=-GetScrollPos(editor->hWnd, SB_VERT);
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while(item != editor->pBuffer->pLast) {
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assert(item->type == diParagraph);
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if (!bOnlyNew || (item->member.para.nFlags & MEPF_REDRAW))
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{
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ME_DrawParagraph(&c, item);
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item->member.para.nFlags &= ~MEPF_REDRAW;
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}
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c.pt.y += item->member.para.nHeight;
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item = item->member.para.next_para;
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}
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/* FIXME this code just sucks, it should try to redraw incrementally */
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if (c.pt.y<c.rcView.bottom) {
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RECT rc;
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rc.left = c.rcView.left;
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rc.top = c.pt.y;
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rc.right = c.rcView.right;
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rc.bottom = c.pt.y+1;
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FillRect(hDC, &rc, (HBRUSH)GetStockObject(BLACK_BRUSH));
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rc.left = c.rcView.left;
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rc.top = c.pt.y+1;
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rc.right = c.rcView.right;
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rc.bottom = c.rcView.bottom;
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FillRect(hDC, &rc, (HBRUSH)GetStockObject(LTGRAY_BRUSH));
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}
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ME_DestroyContext(&c);
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}
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void ME_Repaint(ME_TextEditor *editor)
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{
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ME_Cursor *pCursor = &editor->pCursors[0];
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ME_DisplayItem *pRun = NULL;
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int nOffset = -1;
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HDC hDC;
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int nCharOfs = ME_CharOfsFromRunOfs(editor, pCursor->pRun, pCursor->nOffset);
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ME_RunOfsFromCharOfs(editor, nCharOfs, &pRun, &nOffset);
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assert(pRun == pCursor->pRun);
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assert(nOffset == pCursor->nOffset);
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DoWrap(editor);
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hDC = GetDC(editor->hWnd);
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ME_HideCaret(editor);
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ME_PaintContent(editor, hDC, TRUE);
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ReleaseDC(editor->hWnd, hDC);
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ME_ShowCaret(editor);
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}
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void ME_UpdateRepaint(ME_TextEditor *editor)
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{
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InvalidateRect(editor->hWnd, NULL, TRUE);
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ME_SendOldNotify(editor, EN_CHANGE);
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ME_Repaint(editor);
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ME_SendOldNotify(editor, EN_UPDATE);
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ME_SendSelChange(editor);
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}
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void ME_DrawTextWithStyle(ME_Context *c, int x, int y, LPCWSTR szText, int nChars,
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ME_Style *s, int *width, int nSelFrom, int nSelTo, int ymin, int cy) {
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HDC hDC = c->hDC;
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HGDIOBJ hOldFont;
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COLORREF rgbOld, rgbBack;
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hOldFont = ME_SelectStyleFont(c->editor, hDC, s);
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rgbBack = ME_GetBackColor(c->editor);
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if ((s->fmt.dwMask & CFM_COLOR) && (s->fmt.dwEffects & CFE_AUTOCOLOR))
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rgbOld = SetTextColor(hDC, GetSysColor(COLOR_WINDOWTEXT));
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else
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rgbOld = SetTextColor(hDC, s->fmt.crTextColor);
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ExtTextOutW(hDC, x, y, 0, NULL, szText, nChars, NULL);
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if (width) {
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SIZE sz;
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GetTextExtentPoint32W(hDC, szText, nChars, &sz);
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*width = sz.cx;
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}
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if (nSelFrom < nChars && nSelTo >= 0 && nSelFrom<nSelTo)
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{
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SIZE sz;
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if (nSelFrom < 0) nSelFrom = 0;
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if (nSelTo > nChars) nSelTo = nChars;
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GetTextExtentPoint32W(hDC, szText, nSelFrom, &sz);
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x += sz.cx;
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GetTextExtentPoint32W(hDC, szText+nSelFrom, nSelTo-nSelFrom, &sz);
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PatBlt(hDC, x, ymin, sz.cx, cy, DSTINVERT);
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}
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SetTextColor(hDC, rgbOld);
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ME_UnselectStyleFont(c->editor, hDC, s, hOldFont);
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}
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void ME_DebugWrite(HDC hDC, POINT *pt, WCHAR *szText) {
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int align = SetTextAlign(hDC, TA_LEFT|TA_TOP);
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HGDIOBJ hFont = SelectObject(hDC, GetStockObject(DEFAULT_GUI_FONT));
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COLORREF color = SetTextColor(hDC, RGB(128,128,128));
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TextOutW(hDC, pt->x, pt->y, szText, lstrlenW(szText));
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SelectObject(hDC, hFont);
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SetTextAlign(hDC, align);
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SetTextColor(hDC, color);
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}
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void ME_DrawGraphics(ME_Context *c, int x, int y, ME_Run *run,
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ME_Paragraph *para, BOOL selected) {
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SIZE sz;
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int xs, ys, xe, ye, h, ym, width, eyes;
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ME_GetGraphicsSize(c->editor, run, &sz);
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xs = run->pt.x;
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ys = y-sz.cy;
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xe = xs+sz.cx;
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ye = y;
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h = ye-ys;
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ym = ys+h/4;
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width = sz.cx;
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eyes = width/8;
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/* draw a smiling face :) */
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Ellipse(c->hDC, xs, ys, xe, ye);
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Ellipse(c->hDC, xs+width/8, ym, x+width/8+eyes, ym+eyes);
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Ellipse(c->hDC, xs+7*width/8-eyes, ym, xs+7*width/8, ym+eyes);
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MoveToEx(c->hDC, xs+width/8, ys+3*h/4-eyes, NULL);
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LineTo(c->hDC, xs+width/8, ys+3*h/4);
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LineTo(c->hDC, xs+7*width/8, ys+3*h/4);
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LineTo(c->hDC, xs+7*width/8, ys+3*h/4-eyes);
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if (selected)
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{
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/* descent is usually (always?) 0 for graphics */
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PatBlt(c->hDC, x, y-run->nAscent, sz.cx, run->nAscent+run->nDescent, DSTINVERT);
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}
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}
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void ME_DrawRun(ME_Context *c, int x, int y, ME_DisplayItem *rundi, ME_Paragraph *para) {
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ME_Run *run = &rundi->member.run;
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int runofs = run->nCharOfs+para->nCharOfs;
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if (run->nFlags & MERF_GRAPHICS) {
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int blfrom, blto;
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ME_GetSelection(c->editor, &blfrom, &blto);
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ME_DrawGraphics(c, x, y, run, para, (runofs >= blfrom) && (runofs < blto));
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} else
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{
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int blfrom, blto;
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ME_DisplayItem *start = ME_FindItemBack(rundi, diStartRow);
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ME_GetSelection(c->editor, &blfrom, &blto);
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ME_DrawTextWithStyle(c, x, y,
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run->strText->szData, ME_StrVLen(run->strText), run->style, NULL,
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blfrom-runofs, blto-runofs, c->pt.y+start->member.row.nYPos, start->member.row.nHeight);
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}
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}
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COLORREF ME_GetBackColor(ME_TextEditor *editor)
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{
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/* Looks like I was seriously confused
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return GetSysColor((GetWindowLong(editor->hWnd, GWL_STYLE) & ES_READONLY) ? COLOR_3DFACE: COLOR_WINDOW);
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*/
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if (editor->rgbBackColor == -1)
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return GetSysColor(COLOR_WINDOW);
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else
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return editor->rgbBackColor;
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}
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void ME_DrawParagraph(ME_Context *c, ME_DisplayItem *paragraph) {
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int align = SetTextAlign(c->hDC, TA_BASELINE);
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ME_DisplayItem *p;
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ME_Run *run;
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ME_Paragraph *para = NULL;
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RECT rc, rcPara;
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int y = c->pt.y;
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int height = 0, baseline = 0, no=0, pno = 0;
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int xs, xe;
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int visible = 0;
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int nMargWidth = 0;
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c->pt.x = c->rcView.left;
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rcPara.left = c->rcView.left;
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rcPara.right = c->rcView.right;
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for (p = paragraph; p!=paragraph->member.para.next_para; p = p->next) {
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switch(p->type) {
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case diParagraph:
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para = &p->member.para;
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break;
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case diStartRow:
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assert(para);
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nMargWidth = (pno==0?para->nFirstMargin:para->nLeftMargin);
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xs = c->rcView.left+nMargWidth;
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xe = c->rcView.right-para->nRightMargin;
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y += height;
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rcPara.top = y;
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rcPara.bottom = y+p->member.row.nHeight;
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visible = RectVisible(c->hDC, &rcPara);
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if (visible) {
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HBRUSH hbr;
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/* left margin */
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rc.left = c->rcView.left;
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rc.right = c->rcView.left+nMargWidth;
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rc.top = y;
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rc.bottom = y+p->member.row.nHeight;
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FillRect(c->hDC, &rc, c->hbrMargin);
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/* right margin */
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rc.left = xe;
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rc.right = c->rcView.right;
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FillRect(c->hDC, &rc, c->hbrMargin);
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rc.left = c->rcView.left+para->nLeftMargin;
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rc.right = xe;
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hbr = CreateSolidBrush(ME_GetBackColor(c->editor));
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FillRect(c->hDC, &rc, hbr);
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DeleteObject(hbr);
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}
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if (me_debug)
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{
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const WCHAR wszRowDebug[] = {'r','o','w','[','%','d',']',0};
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WCHAR buf[128];
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POINT pt = c->pt;
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wsprintfW(buf, wszRowDebug, no);
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pt.y = 12+y;
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ME_DebugWrite(c->hDC, &pt, buf);
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}
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height = p->member.row.nHeight;
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baseline = p->member.row.nBaseline;
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pno++;
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break;
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case diRun:
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assert(para);
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run = &p->member.run;
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if (visible && me_debug) {
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rc.left = c->rcView.left+run->pt.x;
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rc.right = c->rcView.left+run->pt.x+run->nWidth;
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rc.top = c->pt.y+run->pt.y;
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rc.bottom = c->pt.y+run->pt.y+height;
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TRACE("rc = (%ld, %ld, %ld, %ld)\n", rc.left, rc.top, rc.right, rc.bottom);
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if (run->nFlags & MERF_SKIPPED)
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DrawFocusRect(c->hDC, &rc);
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else
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FrameRect(c->hDC, &rc, GetSysColorBrush(COLOR_GRAYTEXT));
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}
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if (visible)
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ME_DrawRun(c, run->pt.x, c->pt.y+run->pt.y+baseline, p, ¶graph->member.para);
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if (me_debug)
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{
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/* I'm using %ls, hope wsprintfW is not going to use wrong (4-byte) WCHAR version */
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const WCHAR wszRunDebug[] = {'[','%','d',':','%','x',']',' ','%','l','s',0};
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WCHAR buf[2560];
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POINT pt;
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pt.x = run->pt.x;
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pt.y = c->pt.y + run->pt.y;
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wsprintfW(buf, wszRunDebug, no, p->member.run.nFlags, p->member.run.strText->szData);
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ME_DebugWrite(c->hDC, &pt, buf);
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}
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/* c->pt.x += p->member.run.nWidth; */
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break;
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default:
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break;
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}
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no++;
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}
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SetTextAlign(c->hDC, align);
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}
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void ME_UpdateScrollBar(ME_TextEditor *editor, int ypos)
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{
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float perc = 0.0;
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SCROLLINFO si;
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HWND hWnd = editor->hWnd;
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int overflow = editor->nTotalLength - editor->sizeWindow.cy;
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si.cbSize = sizeof(SCROLLINFO);
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si.fMask = SIF_PAGE|SIF_POS|SIF_RANGE|SIF_TRACKPOS;
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GetScrollInfo(hWnd, SB_VERT, &si);
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if (ypos < 0) {
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if (si.nMax<1) si.nMax = 1;
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perc = 1.0*si.nPos/si.nMax;
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ypos = perc*overflow;
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}
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if (ypos >= overflow && overflow > 0)
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ypos = overflow - 1;
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if (overflow > 0) {
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EnableScrollBar(hWnd, SB_VERT, ESB_ENABLE_BOTH);
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SetScrollRange(hWnd, SB_VERT, 0, overflow, FALSE);
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SetScrollPos(hWnd, SB_VERT, ypos, TRUE);
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} else {
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EnableScrollBar(hWnd, SB_VERT, ESB_DISABLE_BOTH);
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SetScrollRange(hWnd, SB_VERT, 0, 0, FALSE);
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SetScrollPos(hWnd, SB_VERT, 0, TRUE);
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}
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if (ypos != si.nPos)
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{
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TRACE("ScrollWindow(%d, %d, %d, %0.4f)\n", si.nPos, si.nMax, ypos, perc);
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ScrollWindow(hWnd, 0, si.nPos - ypos, NULL, NULL);
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UpdateWindow(hWnd);
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}
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}
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int ME_GetScrollPos(ME_TextEditor *editor)
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{
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return GetScrollPos(editor->hWnd, SB_VERT);
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}
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void ME_EnsureVisible(ME_TextEditor *editor, ME_DisplayItem *pRun)
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{
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ME_DisplayItem *pRow = ME_FindItemBack(pRun, diStartRow);
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ME_DisplayItem *pPara = ME_FindItemBack(pRun, diParagraph);
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int y, yrel, yheight;
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assert(pRow);
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assert(pPara);
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y = pPara->member.para.nYPos+pRow->member.row.nYPos;
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yheight = pRow->member.row.nHeight;
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yrel = y - ME_GetScrollPos(editor);
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if (yrel < 0)
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ME_UpdateScrollBar(editor, y);
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else if (yrel + yheight > editor->sizeWindow.cy)
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{
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ME_UpdateScrollBar(editor, y + yheight - editor->sizeWindow.cy);
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}
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}
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