1203 lines
32 KiB
C
1203 lines
32 KiB
C
/*
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* RichEdit - Caret and selection functions.
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*
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* Copyright 2004 by Krzysztof Foltman
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* Copyright 2005 by Phil Krylov
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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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static BOOL
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ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs);
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void ME_GetSelection(ME_TextEditor *editor, int *from, int *to)
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{
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*from = ME_GetCursorOfs(editor, 0);
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*to = ME_GetCursorOfs(editor, 1);
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if (*from > *to)
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{
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int tmp = *from;
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*from = *to;
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*to = tmp;
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}
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}
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int ME_GetTextLength(ME_TextEditor *editor)
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{
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return ME_CharOfsFromRunOfs(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun), 0);
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}
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int ME_GetTextLengthEx(ME_TextEditor *editor, GETTEXTLENGTHEX *how)
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{
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int length;
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if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE)
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return E_INVALIDARG;
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if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES)
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return E_INVALIDARG;
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length = ME_GetTextLength(editor);
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if (how->flags & GTL_USECRLF)
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length += editor->nParagraphs;
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if (how->flags & GTL_NUMBYTES)
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{
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CPINFO cpinfo;
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if (how->codepage == 1200)
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return length * 2;
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if (how->flags & GTL_PRECISE)
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FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n");
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if (GetCPInfo(how->codepage, &cpinfo))
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return length * cpinfo.MaxCharSize;
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ERR("Invalid codepage %u\n", how->codepage);
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return E_INVALIDARG;
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}
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return length;
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}
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void ME_SetSelection(ME_TextEditor *editor, int from, int to)
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{
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if (from == 0 && to == -1)
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{
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editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
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editor->pCursors[1].nOffset = 0;
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editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
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editor->pCursors[0].nOffset = 0;
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ME_Repaint(editor);
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ME_ClearTempStyle(editor);
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return;
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}
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if (from == -1)
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{
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editor->pCursors[1] = editor->pCursors[0];
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ME_Repaint(editor);
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ME_ClearTempStyle(editor);
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return;
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}
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if (from>to)
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{
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int tmp = from;
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from = to;
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to = tmp;
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}
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ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset);
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ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset);
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}
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void
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ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
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int *x, int *y, int *height)
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{
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ME_DisplayItem *pCursorRun = pCursor->pRun;
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ME_DisplayItem *pSizeRun = pCursor->pRun;
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assert(!pCursor->nOffset || !editor->bCaretAtEnd);
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assert(height && x && y);
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if (pCursorRun->type == diRun) {
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ME_DisplayItem *row = ME_FindItemBack(pCursorRun, diStartRowOrParagraph);
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if (row) {
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HDC hDC = GetDC(editor->hWnd);
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ME_Context c;
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ME_DisplayItem *run = pCursorRun;
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ME_DisplayItem *para;
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SIZE sz = {0, 0};
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ME_InitContext(&c, editor, hDC);
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if (!pCursor->nOffset && !editor->bCaretAtEnd)
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{
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ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrStartRow);
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if (prev->type == diRun)
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pSizeRun = prev;
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}
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assert(row->type == diStartRow); /* paragraph -> run without start row ?*/
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para = ME_FindItemBack(row, diParagraph);
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if (editor->bCaretAtEnd && !pCursor->nOffset &&
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run == ME_FindItemFwd(row, diRun))
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{
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ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
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if (tmp->type == diRun)
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{
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row = ME_FindItemBack(tmp, diStartRow);
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pSizeRun = run = tmp;
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sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, ME_StrLen(run->member.run.strText));
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}
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}
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if (pCursor->nOffset && !(run->member.run.nFlags & MERF_SKIPPED)) {
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sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, pCursor->nOffset);
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}
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*height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
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*x = run->member.run.pt.x + sz.cx;
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*y = para->member.para.nYPos + row->member.row.nBaseline + pSizeRun->member.run.pt.y - pSizeRun->member.run.nAscent - ME_GetYScrollPos(editor);
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ME_DestroyContext(&c);
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ReleaseDC(editor->hWnd, hDC);
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return;
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}
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}
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*height = 10; /* FIXME use global font */
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*x = 0;
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*y = 0;
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}
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void
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ME_MoveCaret(ME_TextEditor *editor)
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{
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int x, y, height;
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ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
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CreateCaret(editor->hWnd, NULL, 0, height);
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SetCaretPos(x, y);
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}
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void ME_ShowCaret(ME_TextEditor *ed)
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{
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ME_MoveCaret(ed);
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ShowCaret(ed->hWnd);
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}
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void ME_HideCaret(ME_TextEditor *ed)
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{
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HideCaret(ed->hWnd);
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DestroyCaret();
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}
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void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs,
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int nChars)
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{
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ME_Cursor c;
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int shift = 0;
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while(nChars > 0)
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{
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ME_Run *run;
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ME_CursorFromCharOfs(editor, nOfs, &c);
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run = &c.pRun->member.run;
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if (run->nFlags & MERF_ENDPARA) {
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if (!ME_FindItemFwd(c.pRun, diParagraph))
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{
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return;
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}
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ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
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/* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
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ME_CheckCharOffsets(editor);
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nChars--;
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if (editor->bEmulateVersion10 && nChars)
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nChars--;
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continue;
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}
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else
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{
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ME_Cursor cursor;
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int nIntendedChars = nChars;
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int nCharsToDelete = nChars;
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int i;
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int loc = c.nOffset;
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ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
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cursor = c;
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ME_StrRelPos(run->strText, loc, &nChars);
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/* nChars is the number of characters that should be deleted from the
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FOLLOWING runs (these AFTER cursor.pRun)
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nCharsToDelete is a number of chars to delete from THIS run */
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nCharsToDelete -= nChars;
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shift -= nCharsToDelete;
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TRACE("Deleting %d (intended %d-remaning %d) chars at %d in '%s' (%d)\n",
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nCharsToDelete, nIntendedChars, nChars, c.nOffset,
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debugstr_w(run->strText->szData), run->strText->nLen);
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if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete)
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{
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/* undo = reinsert whole run */
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/* nOfs is a character offset (from the start of the document
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to the current (deleted) run */
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ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
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if (pUndo)
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pUndo->di.member.run.nCharOfs = nOfs;
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}
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else
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{
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/* undo = reinsert partial run */
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ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun);
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if (pUndo) {
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ME_DestroyString(pUndo->di.member.run.strText);
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pUndo->di.member.run.nCharOfs = nOfs;
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pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete);
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}
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}
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TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen);
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TRACE("Shift value: %d\n", shift);
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ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete);
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/* update cursors (including c) */
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for (i=-1; i<editor->nCursors; i++) {
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ME_Cursor *pThisCur = editor->pCursors + i;
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if (i == -1) pThisCur = &c;
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if (pThisCur->pRun == cursor.pRun) {
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if (pThisCur->nOffset > cursor.nOffset) {
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if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete)
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pThisCur->nOffset = cursor.nOffset;
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else
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pThisCur->nOffset -= nCharsToDelete;
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assert(pThisCur->nOffset >= 0);
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assert(pThisCur->nOffset <= ME_StrVLen(run->strText));
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}
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if (pThisCur->nOffset == ME_StrVLen(run->strText))
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{
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pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd);
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assert(pThisCur->pRun->type == diRun);
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pThisCur->nOffset = 0;
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}
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}
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}
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/* c = updated data now */
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if (c.pRun == cursor.pRun)
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ME_SkipAndPropagateCharOffset(c.pRun, shift);
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else
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ME_PropagateCharOffset(c.pRun, shift);
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if (!ME_StrVLen(cursor.pRun->member.run.strText))
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{
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TRACE("Removing useless run\n");
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ME_Remove(cursor.pRun);
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ME_DestroyDisplayItem(cursor.pRun);
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}
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shift = 0;
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/*
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ME_CheckCharOffsets(editor);
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*/
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continue;
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}
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}
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}
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void ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor,
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int nChars)
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{
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assert(nCursor>=0 && nCursor<editor->nCursors);
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ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars);
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}
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static const WCHAR wszSpace[] = {' ', 0};
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/* FIXME this is temporary, just to have something to test how bad graphics handler is */
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void ME_InsertGraphicsFromCursor(ME_TextEditor *editor, int nCursor)
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{
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ME_Cursor *pCursor = &editor->pCursors[nCursor];
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ME_DisplayItem *pItem = NULL;
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ME_DisplayItem *pNewRun = NULL;
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ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
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ME_UndoItem *pUndo;
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/* FIXME no no no */
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if (ME_IsSelection(editor))
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ME_DeleteSelection(editor);
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pUndo = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
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if (pUndo) {
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pUndo->nStart = pCursor->nOffset + pCursor->pRun->member.run.nCharOfs + ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs;
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pUndo->nLen = 1;
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}
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if (pCursor->nOffset)
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{
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ME_SplitRunSimple(editor, pCursor->pRun, pCursor->nOffset);
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}
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pItem = pCursor->pRun;
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pNewRun = ME_MakeRun(pStyle, ME_MakeStringN(wszSpace, 1), MERF_GRAPHICS);
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pNewRun->member.run.nCharOfs = pCursor->pRun->member.run.nCharOfs;
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ME_InsertBefore(pCursor->pRun, pNewRun);
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ME_PropagateCharOffset(pItem, 1);
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ME_CheckCharOffsets(editor);
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ME_SendSelChange(editor);
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}
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static void
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ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor,
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const WCHAR *str, int len, ME_Style *style,
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int flags)
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{
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ME_Cursor *p = &editor->pCursors[nCursor];
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editor->bCaretAtEnd = FALSE;
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assert(p->pRun->type == diRun);
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ME_InsertRunAtCursor(editor, p, style, str, len, flags);
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}
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void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
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const WCHAR *str, int len, ME_Style *style)
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{
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const WCHAR *pos;
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ME_Cursor *p = NULL;
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assert(style);
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/* FIXME really HERE ? */
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if (ME_IsSelection(editor))
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ME_DeleteSelection(editor);
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assert(nCursor>=0 && nCursor<editor->nCursors);
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if (len == -1)
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len = lstrlenW(str);
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while (len)
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{
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pos = str;
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/* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */
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while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t')
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pos++;
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if (pos-str < len && *pos == '\t') { /* handle tabs */
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WCHAR tab = '\t';
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if (pos!=str)
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ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
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ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
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pos++;
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if(pos-str <= len) {
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len -= pos - str;
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str = pos;
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continue;
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}
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}
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if (pos-str < len) { /* handle EOLs */
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ME_DisplayItem *tp, *end_run;
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ME_Style *tmp_style;
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if (pos!=str)
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ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
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p = &editor->pCursors[nCursor];
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if (p->nOffset) {
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ME_SplitRunSimple(editor, p->pRun, p->nOffset);
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p = &editor->pCursors[nCursor];
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}
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tmp_style = ME_GetInsertStyle(editor, nCursor);
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/* ME_SplitParagraph increases style refcount */
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tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style);
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p->pRun = ME_FindItemFwd(tp, diRun);
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end_run = ME_FindItemBack(tp, diRun);
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ME_ReleaseStyle(end_run->member.run.style);
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end_run->member.run.style = tmp_style;
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p->nOffset = 0;
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if(pos-str < len && *pos =='\r')
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pos++;
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if(pos-str < len && *pos =='\n')
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pos++;
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if(pos-str <= len) {
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len -= pos - str;
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str = pos;
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continue;
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}
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}
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ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0);
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len = 0;
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}
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}
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static BOOL
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ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
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{
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ME_DisplayItem *pRun = pCursor->pRun;
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if (nRelOfs == -1)
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{
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if (!pCursor->nOffset)
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{
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do {
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pRun = ME_FindItemBack(pRun, diRunOrParagraph);
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assert(pRun);
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switch (pRun->type)
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{
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case diRun:
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break;
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case diParagraph:
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if (pRun->member.para.prev_para->type == diTextStart)
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return FALSE;
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pRun = ME_FindItemBack(pRun, diRunOrParagraph);
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/* every paragraph ought to have at least one run */
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assert(pRun && pRun->type == diRun);
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assert(pRun->member.run.nFlags & MERF_ENDPARA);
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break;
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default:
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assert(pRun->type != diRun && pRun->type != diParagraph);
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return FALSE;
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}
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} while (RUN_IS_HIDDEN(&pRun->member.run));
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pCursor->pRun = pRun;
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if (pRun->member.run.nFlags & MERF_ENDPARA)
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pCursor->nOffset = 0;
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else
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pCursor->nOffset = pRun->member.run.strText->nLen;
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}
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if (pCursor->nOffset)
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pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs);
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return TRUE;
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}
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else
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{
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if (!(pRun->member.run.nFlags & MERF_ENDPARA))
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{
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int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs);
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if (new_ofs < pRun->member.run.strText->nLen)
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{
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pCursor->nOffset = new_ofs;
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return TRUE;
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}
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}
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do {
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pRun = ME_FindItemFwd(pRun, diRun);
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} while (pRun && RUN_IS_HIDDEN(&pRun->member.run));
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if (pRun)
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{
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pCursor->pRun = pRun;
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pCursor->nOffset = 0;
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return TRUE;
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}
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}
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return FALSE;
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|
}
|
|
|
|
|
|
static BOOL
|
|
ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
|
|
{
|
|
ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
|
|
int nOffset = cursor->nOffset;
|
|
|
|
if (nRelOfs == -1)
|
|
{
|
|
/* Backward movement */
|
|
while (TRUE)
|
|
{
|
|
nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
|
|
nOffset, WB_MOVEWORDLEFT);
|
|
if (nOffset)
|
|
break;
|
|
pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
|
|
if (pOtherRun->type == diRun)
|
|
{
|
|
if (ME_CallWordBreakProc(editor, pOtherRun->member.run.strText,
|
|
pOtherRun->member.run.strText->nLen - 1,
|
|
WB_ISDELIMITER)
|
|
&& !(pRun->member.run.nFlags & MERF_ENDPARA)
|
|
&& !(cursor->pRun == pRun && cursor->nOffset == 0)
|
|
&& !ME_CallWordBreakProc(editor, pRun->member.run.strText, 0,
|
|
WB_ISDELIMITER))
|
|
break;
|
|
pRun = pOtherRun;
|
|
nOffset = pOtherRun->member.run.strText->nLen;
|
|
}
|
|
else if (pOtherRun->type == diParagraph)
|
|
{
|
|
if (cursor->pRun == pRun && cursor->nOffset == 0)
|
|
{
|
|
/* Paragraph breaks are treated as separate words */
|
|
if (pOtherRun->member.para.prev_para->type == diTextStart)
|
|
return FALSE;
|
|
pRun = ME_FindItemBack(pOtherRun, diRunOrParagraph);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Forward movement */
|
|
BOOL last_delim = FALSE;
|
|
|
|
while (TRUE)
|
|
{
|
|
if (last_delim && !ME_CallWordBreakProc(editor, pRun->member.run.strText,
|
|
nOffset, WB_ISDELIMITER))
|
|
break;
|
|
nOffset = ME_CallWordBreakProc(editor, pRun->member.run.strText,
|
|
nOffset, WB_MOVEWORDRIGHT);
|
|
if (nOffset < pRun->member.run.strText->nLen)
|
|
break;
|
|
pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
|
|
if (pOtherRun->type == diRun)
|
|
{
|
|
last_delim = ME_CallWordBreakProc(editor, pRun->member.run.strText,
|
|
nOffset - 1, WB_ISDELIMITER);
|
|
pRun = pOtherRun;
|
|
nOffset = 0;
|
|
}
|
|
else if (pOtherRun->type == diParagraph)
|
|
{
|
|
if (cursor->pRun == pRun)
|
|
pRun = ME_FindItemFwd(pOtherRun, diRun);
|
|
nOffset = 0;
|
|
break;
|
|
}
|
|
else /* diTextEnd */
|
|
{
|
|
if (cursor->pRun == pRun)
|
|
return FALSE;
|
|
nOffset = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
cursor->pRun = pRun;
|
|
cursor->nOffset = nOffset;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
void
|
|
ME_SelectWord(ME_TextEditor *editor)
|
|
{
|
|
if (!(editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA))
|
|
ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
|
|
ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
|
|
ME_InvalidateSelection(editor);
|
|
ME_SendSelChange(editor);
|
|
}
|
|
|
|
|
|
int ME_GetCursorOfs(ME_TextEditor *editor, int nCursor)
|
|
{
|
|
ME_Cursor *pCursor = &editor->pCursors[nCursor];
|
|
|
|
return ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs
|
|
+ pCursor->pRun->member.run.nCharOfs + pCursor->nOffset;
|
|
}
|
|
|
|
int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
|
|
{
|
|
ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
|
|
int rx = 0;
|
|
|
|
if (is_eol)
|
|
*is_eol = 0;
|
|
|
|
while(p != editor->pBuffer->pLast)
|
|
{
|
|
if (p->type == diParagraph)
|
|
{
|
|
int ry = y - p->member.para.nYPos;
|
|
if (ry < 0)
|
|
{
|
|
result->pRun = ME_FindItemFwd(p, diRun);
|
|
result->nOffset = 0;
|
|
return 0;
|
|
}
|
|
if (ry >= p->member.para.nHeight)
|
|
{
|
|
p = p->member.para.next_para;
|
|
continue;
|
|
}
|
|
p = ME_FindItemFwd(p, diStartRow);
|
|
y = ry;
|
|
continue;
|
|
}
|
|
if (p->type == diStartRow)
|
|
{
|
|
int ry = y - p->member.row.nYPos;
|
|
if (ry < 0)
|
|
return 0;
|
|
if (ry >= p->member.row.nHeight)
|
|
{
|
|
p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
|
|
if (p->type != diStartRow)
|
|
return 0;
|
|
continue;
|
|
}
|
|
p = ME_FindItemFwd(p, diRun);
|
|
continue;
|
|
}
|
|
if (p->type == diRun)
|
|
{
|
|
ME_DisplayItem *pp;
|
|
rx = x - p->member.run.pt.x;
|
|
if (rx < 0)
|
|
rx = 0;
|
|
if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
|
|
{
|
|
pp = p;
|
|
do {
|
|
p = p->next;
|
|
if (p->type == diRun)
|
|
{
|
|
rx = x - p->member.run.pt.x;
|
|
goto continue_search;
|
|
}
|
|
if (p->type == diStartRow)
|
|
{
|
|
p = ME_FindItemFwd(p, diRun);
|
|
if (is_eol)
|
|
*is_eol = 1;
|
|
rx = 0; /* FIXME not sure */
|
|
goto found_here;
|
|
}
|
|
if (p->type == diParagraph || p->type == diTextEnd)
|
|
{
|
|
rx = 0; /* FIXME not sure */
|
|
p = pp;
|
|
goto found_here;
|
|
}
|
|
} while(1);
|
|
continue;
|
|
}
|
|
found_here:
|
|
if (p->member.run.nFlags & MERF_ENDPARA)
|
|
rx = 0;
|
|
result->pRun = p;
|
|
result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
|
|
if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
|
|
{
|
|
result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
|
|
result->nOffset = 0;
|
|
}
|
|
return 1;
|
|
}
|
|
assert(0);
|
|
continue_search:
|
|
;
|
|
}
|
|
result->pRun = ME_FindItemBack(p, diRun);
|
|
result->nOffset = 0;
|
|
assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
ME_CharFromPos(ME_TextEditor *editor, int x, int y)
|
|
{
|
|
ME_Cursor cursor;
|
|
RECT rc;
|
|
|
|
GetClientRect(editor->hWnd, &rc);
|
|
if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom)
|
|
return -1;
|
|
ME_FindPixelPos(editor, x, y, &cursor, NULL);
|
|
return (ME_GetParagraph(cursor.pRun)->member.para.nCharOfs
|
|
+ cursor.pRun->member.run.nCharOfs + cursor.nOffset);
|
|
}
|
|
|
|
|
|
void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
|
|
{
|
|
ME_Cursor tmp_cursor;
|
|
int is_selection = 0;
|
|
|
|
editor->nUDArrowX = -1;
|
|
|
|
y += ME_GetYScrollPos(editor);
|
|
|
|
tmp_cursor = editor->pCursors[0];
|
|
is_selection = ME_IsSelection(editor);
|
|
|
|
ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd);
|
|
|
|
if (GetKeyState(VK_SHIFT)>=0)
|
|
{
|
|
editor->pCursors[1] = editor->pCursors[0];
|
|
}
|
|
else
|
|
{
|
|
if (!is_selection) {
|
|
editor->pCursors[1] = tmp_cursor;
|
|
is_selection = 1;
|
|
}
|
|
}
|
|
ME_InvalidateSelection(editor);
|
|
HideCaret(editor->hWnd);
|
|
ME_MoveCaret(editor);
|
|
ShowCaret(editor->hWnd);
|
|
ME_ClearTempStyle(editor);
|
|
ME_SendSelChange(editor);
|
|
}
|
|
|
|
void ME_MouseMove(ME_TextEditor *editor, int x, int y)
|
|
{
|
|
ME_Cursor tmp_cursor;
|
|
|
|
y += ME_GetYScrollPos(editor);
|
|
|
|
tmp_cursor = editor->pCursors[0];
|
|
if (!ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd))
|
|
/* return */;
|
|
|
|
if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
|
|
tmp_cursor.nOffset == editor->pCursors[0].nOffset)
|
|
return;
|
|
|
|
ME_InvalidateSelection(editor);
|
|
editor->pCursors[0] = tmp_cursor;
|
|
HideCaret(editor->hWnd);
|
|
ME_MoveCaret(editor);
|
|
ME_InvalidateSelection(editor);
|
|
ShowCaret(editor->hWnd);
|
|
ME_SendSelChange(editor);
|
|
}
|
|
|
|
static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
|
|
int x, int *pOffset, int *pbCaretAtEnd)
|
|
{
|
|
ME_DisplayItem *pNext, *pLastRun;
|
|
pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
|
|
assert(pNext->type == diRun);
|
|
pLastRun = pNext;
|
|
*pbCaretAtEnd = FALSE;
|
|
do {
|
|
int run_x = pNext->member.run.pt.x;
|
|
int width = pNext->member.run.nWidth;
|
|
if (x < run_x)
|
|
{
|
|
if (pOffset) *pOffset = 0;
|
|
return pNext;
|
|
}
|
|
if (x >= run_x && x < run_x+width)
|
|
{
|
|
int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
|
|
ME_String *s = pNext->member.run.strText;
|
|
if (ch < s->nLen) {
|
|
if (pOffset)
|
|
*pOffset = ch;
|
|
return pNext;
|
|
}
|
|
}
|
|
pLastRun = pNext;
|
|
pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
|
|
} while(pNext && pNext->type == diRun);
|
|
|
|
if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
|
|
{
|
|
pNext = ME_FindItemFwd(pNext, diRun);
|
|
if (pbCaretAtEnd) *pbCaretAtEnd = 1;
|
|
if (pOffset) *pOffset = 0;
|
|
return pNext;
|
|
} else {
|
|
if (pbCaretAtEnd) *pbCaretAtEnd = 0;
|
|
if (pOffset) *pOffset = 0;
|
|
return pLastRun;
|
|
}
|
|
}
|
|
|
|
static int ME_GetXForArrow(ME_TextEditor *editor, ME_Cursor *pCursor)
|
|
{
|
|
ME_DisplayItem *pRun = pCursor->pRun;
|
|
int x;
|
|
|
|
if (editor->nUDArrowX != -1)
|
|
x = editor->nUDArrowX;
|
|
else {
|
|
if (editor->bCaretAtEnd)
|
|
{
|
|
pRun = ME_FindItemBack(pRun, diRun);
|
|
assert(pRun);
|
|
x = pRun->member.run.pt.x + pRun->member.run.nWidth;
|
|
}
|
|
else {
|
|
x = pRun->member.run.pt.x;
|
|
x += ME_PointFromChar(editor, &pRun->member.run, pCursor->nOffset);
|
|
}
|
|
editor->nUDArrowX = x;
|
|
}
|
|
return x;
|
|
}
|
|
|
|
|
|
static void
|
|
ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
|
|
{
|
|
ME_DisplayItem *pRun = pCursor->pRun;
|
|
ME_DisplayItem *pItem;
|
|
int x = ME_GetXForArrow(editor, pCursor);
|
|
|
|
if (editor->bCaretAtEnd && !pCursor->nOffset)
|
|
pRun = ME_FindItemBack(pRun, diRun);
|
|
if (!pRun)
|
|
return;
|
|
if (nRelOfs == -1)
|
|
{
|
|
/* start of this row */
|
|
pItem = ME_FindItemBack(pRun, diStartRow);
|
|
assert(pItem);
|
|
/* start of the previous row */
|
|
pItem = ME_FindItemBack(pItem, diStartRow);
|
|
}
|
|
else
|
|
{
|
|
/* start of the next row */
|
|
pItem = ME_FindItemFwd(pRun, diStartRow);
|
|
/* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
|
|
*/
|
|
}
|
|
if (!pItem)
|
|
{
|
|
/* row not found - ignore */
|
|
return;
|
|
}
|
|
pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
|
|
assert(pCursor->pRun);
|
|
assert(pCursor->pRun->type == diRun);
|
|
}
|
|
|
|
|
|
static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
|
|
{
|
|
ME_DisplayItem *pRun = pCursor->pRun;
|
|
ME_DisplayItem *pLast, *p;
|
|
int x, y, ys, yd, yp, yprev;
|
|
ME_Cursor tmp_curs = *pCursor;
|
|
|
|
x = ME_GetXForArrow(editor, pCursor);
|
|
if (!pCursor->nOffset && editor->bCaretAtEnd)
|
|
pRun = ME_FindItemBack(pRun, diRun);
|
|
|
|
p = ME_FindItemBack(pRun, diStartRowOrParagraph);
|
|
assert(p->type == diStartRow);
|
|
yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
|
|
yprev = ys = y = yp + p->member.row.nYPos;
|
|
yd = y - editor->sizeWindow.cy;
|
|
pLast = p;
|
|
|
|
do {
|
|
p = ME_FindItemBack(p, diStartRowOrParagraph);
|
|
if (!p)
|
|
break;
|
|
if (p->type == diParagraph) { /* crossing paragraphs */
|
|
if (p->member.para.prev_para == NULL)
|
|
break;
|
|
yp = p->member.para.prev_para->member.para.nYPos;
|
|
continue;
|
|
}
|
|
y = yp + p->member.row.nYPos;
|
|
if (y < yd)
|
|
break;
|
|
pLast = p;
|
|
yprev = y;
|
|
} while(1);
|
|
|
|
pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
|
|
ME_UpdateSelection(editor, &tmp_curs);
|
|
if (yprev < editor->sizeWindow.cy)
|
|
{
|
|
ME_EnsureVisible(editor, ME_FindItemFwd(editor->pBuffer->pFirst, diRun));
|
|
ME_Repaint(editor);
|
|
}
|
|
else {
|
|
ME_Scroll(editor, 0, ys-yprev);
|
|
ME_Repaint(editor);
|
|
}
|
|
assert(pCursor->pRun);
|
|
assert(pCursor->pRun->type == diRun);
|
|
}
|
|
|
|
/* FIXME: in the original RICHEDIT, PageDown always scrolls by the same amount
|
|
of pixels, even if it makes the scroll bar position exceed its normal maximum.
|
|
In such a situation, clicking the scrollbar restores its position back to the
|
|
normal range (ie. sets it to (doclength-screenheight)). */
|
|
|
|
static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
|
|
{
|
|
ME_DisplayItem *pRun = pCursor->pRun;
|
|
ME_DisplayItem *pLast, *p;
|
|
int x, y, ys, yd, yp, yprev;
|
|
ME_Cursor tmp_curs = *pCursor;
|
|
|
|
x = ME_GetXForArrow(editor, pCursor);
|
|
if (!pCursor->nOffset && editor->bCaretAtEnd)
|
|
pRun = ME_FindItemBack(pRun, diRun);
|
|
|
|
p = ME_FindItemBack(pRun, diStartRowOrParagraph);
|
|
assert(p->type == diStartRow);
|
|
yp = ME_FindItemBack(p, diParagraph)->member.para.nYPos;
|
|
yprev = ys = y = yp + p->member.row.nYPos;
|
|
yd = y + editor->sizeWindow.cy;
|
|
pLast = p;
|
|
|
|
do {
|
|
p = ME_FindItemFwd(p, diStartRowOrParagraph);
|
|
if (!p)
|
|
break;
|
|
if (p->type == diParagraph) {
|
|
yp = p->member.para.nYPos;
|
|
continue;
|
|
}
|
|
y = yp + p->member.row.nYPos;
|
|
if (y >= yd)
|
|
break;
|
|
pLast = p;
|
|
yprev = y;
|
|
} while(1);
|
|
|
|
pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset, &editor->bCaretAtEnd);
|
|
ME_UpdateSelection(editor, &tmp_curs);
|
|
if (yprev >= editor->nTotalLength-editor->sizeWindow.cy)
|
|
{
|
|
ME_EnsureVisible(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun));
|
|
ME_Repaint(editor);
|
|
}
|
|
else {
|
|
ME_Scroll(editor, 0, ys-yprev);
|
|
ME_Repaint(editor);
|
|
}
|
|
assert(pCursor->pRun);
|
|
assert(pCursor->pRun->type == diRun);
|
|
}
|
|
|
|
static void ME_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
|
|
{
|
|
ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
|
|
if (pRow) {
|
|
ME_DisplayItem *pRun;
|
|
if (editor->bCaretAtEnd && !pCursor->nOffset) {
|
|
pRow = ME_FindItemBack(pRow, diStartRow);
|
|
if (!pRow)
|
|
return;
|
|
}
|
|
pRun = ME_FindItemFwd(pRow, diRun);
|
|
if (pRun) {
|
|
pCursor->pRun = pRun;
|
|
pCursor->nOffset = 0;
|
|
}
|
|
}
|
|
editor->bCaretAtEnd = FALSE;
|
|
}
|
|
|
|
static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
|
|
{
|
|
ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diTextStart);
|
|
if (pRow) {
|
|
ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
|
|
if (pRun) {
|
|
pCursor->pRun = pRun;
|
|
pCursor->nOffset = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ME_ArrowEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
|
|
{
|
|
ME_DisplayItem *pRow;
|
|
|
|
if (editor->bCaretAtEnd && !pCursor->nOffset)
|
|
return;
|
|
|
|
pRow = ME_FindItemFwd(pCursor->pRun, diStartRowOrParagraphOrEnd);
|
|
assert(pRow);
|
|
if (pRow->type == diStartRow) {
|
|
/* FIXME WTF was I thinking about here ? */
|
|
ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
|
|
assert(pRun);
|
|
pCursor->pRun = pRun;
|
|
pCursor->nOffset = 0;
|
|
editor->bCaretAtEnd = 1;
|
|
return;
|
|
}
|
|
pCursor->pRun = ME_FindItemBack(pRow, diRun);
|
|
assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
|
|
pCursor->nOffset = 0;
|
|
editor->bCaretAtEnd = FALSE;
|
|
}
|
|
|
|
static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
|
|
{
|
|
ME_DisplayItem *p = ME_FindItemFwd(pCursor->pRun, diTextEnd);
|
|
assert(p);
|
|
p = ME_FindItemBack(p, diRun);
|
|
assert(p);
|
|
assert(p->member.run.nFlags & MERF_ENDPARA);
|
|
pCursor->pRun = p;
|
|
pCursor->nOffset = 0;
|
|
editor->bCaretAtEnd = FALSE;
|
|
}
|
|
|
|
BOOL ME_IsSelection(ME_TextEditor *editor)
|
|
{
|
|
return memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor))!=0;
|
|
}
|
|
|
|
static int ME_GetSelCursor(ME_TextEditor *editor, int dir)
|
|
{
|
|
int cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
|
|
|
|
if (cdir*dir>0)
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
BOOL ME_UpdateSelection(ME_TextEditor *editor, ME_Cursor *pTempCursor)
|
|
{
|
|
ME_Cursor old_anchor = editor->pCursors[1];
|
|
|
|
if (GetKeyState(VK_SHIFT)>=0) /* cancelling selection */
|
|
{
|
|
/* any selection was present ? if so, it's no more, repaint ! */
|
|
editor->pCursors[1] = editor->pCursors[0];
|
|
if (memcmp(pTempCursor, &old_anchor, sizeof(ME_Cursor))) {
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
else
|
|
{
|
|
if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
|
|
{
|
|
editor->pCursors[1] = *pTempCursor;
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
ME_Repaint(editor);
|
|
return TRUE;
|
|
}
|
|
|
|
void ME_DeleteSelection(ME_TextEditor *editor)
|
|
{
|
|
int from, to;
|
|
ME_GetSelection(editor, &from, &to);
|
|
ME_DeleteTextAtCursor(editor, ME_GetSelCursor(editor,-1), to-from);
|
|
}
|
|
|
|
ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
|
|
{
|
|
ME_Style *style;
|
|
int from, to;
|
|
ME_Cursor c;
|
|
|
|
ME_GetSelection(editor, &from, &to);
|
|
ME_CursorFromCharOfs(editor, from, &c);
|
|
if (from != to) {
|
|
style = c.pRun->member.run.style;
|
|
ME_AddRefStyle(style); /* ME_GetInsertStyle has already done that */
|
|
}
|
|
else
|
|
style = ME_GetInsertStyle(editor, 0);
|
|
return style;
|
|
}
|
|
|
|
void ME_SendSelChange(ME_TextEditor *editor)
|
|
{
|
|
SELCHANGE sc;
|
|
|
|
ME_ClearTempStyle(editor);
|
|
|
|
if (!(editor->nEventMask & ENM_SELCHANGE))
|
|
return;
|
|
|
|
sc.nmhdr.hwndFrom = editor->hWnd;
|
|
sc.nmhdr.idFrom = GetWindowLongW(editor->hWnd, GWLP_ID);
|
|
sc.nmhdr.code = EN_SELCHANGE;
|
|
SendMessageW(editor->hWnd, EM_EXGETSEL, 0, (LPARAM)&sc.chrg);
|
|
sc.seltyp = SEL_EMPTY;
|
|
if (sc.chrg.cpMin != sc.chrg.cpMax)
|
|
sc.seltyp |= SEL_TEXT;
|
|
if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* wth were RICHEDIT authors thinking ? */
|
|
sc.seltyp |= SEL_MULTICHAR;
|
|
SendMessageW(GetParent(editor->hWnd), WM_NOTIFY, sc.nmhdr.idFrom, (LPARAM)&sc);
|
|
}
|
|
|
|
|
|
BOOL
|
|
ME_ArrowKey(ME_TextEditor *editor, int nVKey, BOOL extend, BOOL ctrl)
|
|
{
|
|
int nCursor = 0;
|
|
ME_Cursor *p = &editor->pCursors[nCursor];
|
|
ME_Cursor tmp_curs = *p;
|
|
BOOL success = FALSE;
|
|
|
|
if (ME_IsSelection(editor) && !extend)
|
|
ME_InvalidateSelection(editor);
|
|
|
|
editor->nUDArrowX = -1;
|
|
switch(nVKey) {
|
|
case VK_LEFT:
|
|
editor->bCaretAtEnd = 0;
|
|
if (ctrl)
|
|
success = ME_MoveCursorWords(editor, &tmp_curs, -1);
|
|
else
|
|
success = ME_MoveCursorChars(editor, &tmp_curs, -1);
|
|
break;
|
|
case VK_RIGHT:
|
|
editor->bCaretAtEnd = 0;
|
|
if (ctrl)
|
|
success = ME_MoveCursorWords(editor, &tmp_curs, +1);
|
|
else
|
|
success = ME_MoveCursorChars(editor, &tmp_curs, +1);
|
|
break;
|
|
case VK_UP:
|
|
ME_MoveCursorLines(editor, &tmp_curs, -1);
|
|
break;
|
|
case VK_DOWN:
|
|
ME_MoveCursorLines(editor, &tmp_curs, +1);
|
|
break;
|
|
case VK_PRIOR:
|
|
ME_ArrowPageUp(editor, &tmp_curs);
|
|
break;
|
|
case VK_NEXT:
|
|
ME_ArrowPageDown(editor, &tmp_curs);
|
|
break;
|
|
case VK_HOME: {
|
|
if (ctrl)
|
|
ME_ArrowCtrlHome(editor, &tmp_curs);
|
|
else
|
|
ME_ArrowHome(editor, &tmp_curs);
|
|
editor->bCaretAtEnd = 0;
|
|
break;
|
|
}
|
|
case VK_END:
|
|
if (ctrl)
|
|
ME_ArrowCtrlEnd(editor, &tmp_curs);
|
|
else
|
|
ME_ArrowEnd(editor, &tmp_curs);
|
|
break;
|
|
}
|
|
|
|
if (!extend)
|
|
editor->pCursors[1] = tmp_curs;
|
|
*p = tmp_curs;
|
|
|
|
if (ME_IsSelection(editor))
|
|
ME_InvalidateSelection(editor);
|
|
HideCaret(editor->hWnd);
|
|
ME_EnsureVisible(editor, tmp_curs.pRun);
|
|
ME_ShowCaret(editor);
|
|
ME_SendSelChange(editor);
|
|
return success;
|
|
}
|