| /* |
| * RichEdit - Caret and selection functions. |
| * |
| * Copyright 2004 by Krzysztof Foltman |
| * Copyright 2005 by Phil Krylov |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| */ |
| |
| |
| #include "editor.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(richedit); |
| |
| static BOOL |
| ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs); |
| |
| |
| void ME_GetSelection(ME_TextEditor *editor, int *from, int *to) |
| { |
| *from = ME_GetCursorOfs(editor, 0); |
| *to = ME_GetCursorOfs(editor, 1); |
| |
| if (*from > *to) |
| { |
| int tmp = *from; |
| *from = *to; |
| *to = tmp; |
| } |
| } |
| |
| int ME_GetTextLength(ME_TextEditor *editor) |
| { |
| return ME_CharOfsFromRunOfs(editor, ME_FindItemBack(editor->pBuffer->pLast, diRun), 0); |
| } |
| |
| |
| int ME_GetTextLengthEx(ME_TextEditor *editor, const GETTEXTLENGTHEX *how) |
| { |
| int length; |
| |
| if (how->flags & GTL_PRECISE && how->flags & GTL_CLOSE) |
| return E_INVALIDARG; |
| if (how->flags & GTL_NUMCHARS && how->flags & GTL_NUMBYTES) |
| return E_INVALIDARG; |
| |
| length = ME_GetTextLength(editor); |
| |
| if ((GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_MULTILINE) && (how->flags & GTL_USECRLF)) |
| length += editor->nParagraphs - 1; |
| |
| if (how->flags & GTL_NUMBYTES) |
| { |
| CPINFO cpinfo; |
| |
| if (how->codepage == 1200) |
| return length * 2; |
| if (how->flags & GTL_PRECISE) |
| FIXME("GTL_PRECISE flag unsupported. Using GTL_CLOSE\n"); |
| if (GetCPInfo(how->codepage, &cpinfo)) |
| return length * cpinfo.MaxCharSize; |
| ERR("Invalid codepage %u\n", how->codepage); |
| return E_INVALIDARG; |
| } |
| return length; |
| } |
| |
| |
| int ME_SetSelection(ME_TextEditor *editor, int from, int to) |
| { |
| int selectionEnd = 0; |
| const int len = ME_GetTextLength(editor); |
| |
| /* all negative values are effectively the same */ |
| if (from < 0) |
| from = -1; |
| if (to < 0) |
| to = -1; |
| |
| /* select all */ |
| if (from == 0 && to == -1) |
| { |
| editor->pCursors[1].pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun); |
| editor->pCursors[1].nOffset = 0; |
| editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun); |
| editor->pCursors[0].nOffset = 0; |
| ME_InvalidateSelection(editor); |
| ME_ClearTempStyle(editor); |
| return len + 1; |
| } |
| |
| /* if both values are equal and also out of bound, that means to */ |
| /* put the selection at the end of the text */ |
| if ((from == to) && (to < 0 || to > len)) |
| { |
| selectionEnd = 1; |
| } |
| else |
| { |
| /* if from is negative and to is positive then selection is */ |
| /* deselected and caret moved to end of the current selection */ |
| if (from < 0) |
| { |
| int start, end; |
| ME_GetSelection(editor, &start, &end); |
| editor->pCursors[1] = editor->pCursors[0]; |
| ME_Repaint(editor); |
| ME_ClearTempStyle(editor); |
| return end; |
| } |
| |
| /* adjust to if it's a negative value */ |
| if (to < 0) |
| to = len + 1; |
| |
| /* flip from and to if they are reversed */ |
| if (from>to) |
| { |
| int tmp = from; |
| from = to; |
| to = tmp; |
| } |
| |
| /* after fiddling with the values, we find from > len && to > len */ |
| if (from > len) |
| selectionEnd = 1; |
| /* special case with to too big */ |
| else if (to > len) |
| to = len + 1; |
| } |
| |
| if (selectionEnd) |
| { |
| editor->pCursors[1].pRun = editor->pCursors[0].pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun); |
| editor->pCursors[1].nOffset = editor->pCursors[0].nOffset = 0; |
| ME_InvalidateSelection(editor); |
| ME_ClearTempStyle(editor); |
| return len; |
| } |
| |
| ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset); |
| ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset); |
| return to; |
| } |
| |
| |
| void |
| ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor, |
| int *x, int *y, int *height) |
| { |
| ME_DisplayItem *pCursorRun = pCursor->pRun; |
| ME_DisplayItem *pSizeRun = pCursor->pRun; |
| |
| assert(!pCursor->nOffset || !editor->bCaretAtEnd); |
| assert(height && x && y); |
| assert(!(ME_GetParagraph(pCursorRun)->member.para.nFlags & MEPF_REWRAP)); |
| assert(pCursor->pRun); |
| assert(pCursor->pRun->type == diRun); |
| |
| if (pCursorRun->type == diRun) { |
| ME_DisplayItem *row = ME_FindItemBack(pCursorRun, diStartRowOrParagraph); |
| |
| if (row) { |
| HDC hDC = GetDC(editor->hWnd); |
| ME_Context c; |
| ME_DisplayItem *run = pCursorRun; |
| ME_DisplayItem *para = NULL; |
| SIZE sz = {0, 0}; |
| |
| ME_InitContext(&c, editor, hDC); |
| |
| if (!pCursor->nOffset && !editor->bCaretAtEnd) |
| { |
| ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrStartRow); |
| assert(prev); |
| if (prev->type == diRun) |
| pSizeRun = prev; |
| } |
| assert(row->type == diStartRow); /* paragraph -> run without start row ?*/ |
| para = ME_FindItemBack(row, diParagraph); |
| assert(para); |
| assert(para->type == diParagraph); |
| if (editor->bCaretAtEnd && !pCursor->nOffset && |
| run == ME_FindItemFwd(row, diRun)) |
| { |
| ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph); |
| assert(tmp); |
| if (tmp->type == diRun) |
| { |
| row = ME_FindItemBack(tmp, diStartRow); |
| pSizeRun = run = tmp; |
| assert(run); |
| assert(run->type == diRun); |
| sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, ME_StrLen(run->member.run.strText)); |
| } |
| } |
| if (pCursor->nOffset && !(run->member.run.nFlags & MERF_SKIPPED)) { |
| sz = ME_GetRunSize(&c, ¶->member.para, &run->member.run, pCursor->nOffset); |
| } |
| |
| *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent; |
| *x = run->member.run.pt.x + sz.cx; |
| *y = para->member.para.nYPos + row->member.row.nBaseline + pSizeRun->member.run.pt.y - pSizeRun->member.run.nAscent - ME_GetYScrollPos(editor); |
| |
| ME_DestroyContext(&c); |
| ReleaseDC(editor->hWnd, hDC); |
| return; |
| } |
| } |
| *height = 10; /* FIXME use global font */ |
| *x = 0; |
| *y = 0; |
| } |
| |
| |
| void |
| ME_MoveCaret(ME_TextEditor *editor) |
| { |
| int x, y, height; |
| |
| if (ME_WrapMarkedParagraphs(editor)) |
| ME_UpdateScrollBar(editor); |
| ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height); |
| if(editor->bHaveFocus) |
| { |
| CreateCaret(editor->hWnd, NULL, 0, height); |
| SetCaretPos(x, y); |
| } |
| } |
| |
| |
| void ME_ShowCaret(ME_TextEditor *ed) |
| { |
| ME_MoveCaret(ed); |
| if(ed->bHaveFocus) |
| ShowCaret(ed->hWnd); |
| } |
| |
| void ME_HideCaret(ME_TextEditor *ed) |
| { |
| if(ed->bHaveFocus) |
| { |
| HideCaret(ed->hWnd); |
| DestroyCaret(); |
| } |
| } |
| |
| void ME_InternalDeleteText(ME_TextEditor *editor, int nOfs, |
| int nChars) |
| { |
| ME_Cursor c; |
| int shift = 0; |
| |
| while(nChars > 0) |
| { |
| ME_Run *run; |
| ME_CursorFromCharOfs(editor, nOfs, &c); |
| run = &c.pRun->member.run; |
| if (run->nFlags & MERF_ENDPARA) { |
| if (!ME_FindItemFwd(c.pRun, diParagraph)) |
| { |
| return; |
| } |
| ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun)); |
| /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */ |
| ME_CheckCharOffsets(editor); |
| nChars--; |
| if (editor->bEmulateVersion10 && nChars) |
| nChars--; |
| continue; |
| } |
| else |
| { |
| ME_Cursor cursor; |
| int nIntendedChars = nChars; |
| int nCharsToDelete = nChars; |
| int i; |
| int loc = c.nOffset; |
| |
| ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP; |
| |
| cursor = c; |
| ME_StrRelPos(run->strText, loc, &nChars); |
| /* nChars is the number of characters that should be deleted from the |
| FOLLOWING runs (these AFTER cursor.pRun) |
| nCharsToDelete is a number of chars to delete from THIS run */ |
| nCharsToDelete -= nChars; |
| shift -= nCharsToDelete; |
| TRACE("Deleting %d (intended %d-remaning %d) chars at %d in '%s' (%d)\n", |
| nCharsToDelete, nIntendedChars, nChars, c.nOffset, |
| debugstr_w(run->strText->szData), run->strText->nLen); |
| |
| if (!c.nOffset && ME_StrVLen(run->strText) == nCharsToDelete) |
| { |
| /* undo = reinsert whole run */ |
| /* nOfs is a character offset (from the start of the document |
| to the current (deleted) run */ |
| ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun); |
| if (pUndo) |
| pUndo->di.member.run.nCharOfs = nOfs; |
| } |
| else |
| { |
| /* undo = reinsert partial run */ |
| ME_UndoItem *pUndo = ME_AddUndoItem(editor, diUndoInsertRun, c.pRun); |
| if (pUndo) { |
| ME_DestroyString(pUndo->di.member.run.strText); |
| pUndo->di.member.run.nCharOfs = nOfs; |
| pUndo->di.member.run.strText = ME_MakeStringN(run->strText->szData+c.nOffset, nCharsToDelete); |
| } |
| } |
| TRACE("Post deletion string: %s (%d)\n", debugstr_w(run->strText->szData), run->strText->nLen); |
| TRACE("Shift value: %d\n", shift); |
| ME_StrDeleteV(run->strText, c.nOffset, nCharsToDelete); |
| |
| /* update cursors (including c) */ |
| for (i=-1; i<editor->nCursors; i++) { |
| ME_Cursor *pThisCur = editor->pCursors + i; |
| if (i == -1) pThisCur = &c; |
| if (pThisCur->pRun == cursor.pRun) { |
| if (pThisCur->nOffset > cursor.nOffset) { |
| if (pThisCur->nOffset-cursor.nOffset < nCharsToDelete) |
| pThisCur->nOffset = cursor.nOffset; |
| else |
| pThisCur->nOffset -= nCharsToDelete; |
| assert(pThisCur->nOffset >= 0); |
| assert(pThisCur->nOffset <= ME_StrVLen(run->strText)); |
| } |
| if (pThisCur->nOffset == ME_StrVLen(run->strText)) |
| { |
| pThisCur->pRun = ME_FindItemFwd(pThisCur->pRun, diRunOrParagraphOrEnd); |
| assert(pThisCur->pRun->type == diRun); |
| pThisCur->nOffset = 0; |
| } |
| } |
| } |
| |
| /* c = updated data now */ |
| |
| if (c.pRun == cursor.pRun) |
| ME_SkipAndPropagateCharOffset(c.pRun, shift); |
| else |
| ME_PropagateCharOffset(c.pRun, shift); |
| |
| if (!ME_StrVLen(cursor.pRun->member.run.strText)) |
| { |
| TRACE("Removing useless run\n"); |
| ME_Remove(cursor.pRun); |
| ME_DestroyDisplayItem(cursor.pRun); |
| } |
| |
| shift = 0; |
| /* |
| ME_CheckCharOffsets(editor); |
| */ |
| continue; |
| } |
| } |
| } |
| |
| void ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, |
| int nChars) |
| { |
| assert(nCursor>=0 && nCursor<editor->nCursors); |
| /* text operations set modified state */ |
| editor->nModifyStep = 1; |
| ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars); |
| } |
| |
| static ME_DisplayItem * |
| ME_InternalInsertTextFromCursor(ME_TextEditor *editor, int nCursor, |
| const WCHAR *str, int len, ME_Style *style, |
| int flags) |
| { |
| ME_Cursor *p = &editor->pCursors[nCursor]; |
| |
| editor->bCaretAtEnd = FALSE; |
| |
| assert(p->pRun->type == diRun); |
| |
| return ME_InsertRunAtCursor(editor, p, style, str, len, flags); |
| } |
| |
| |
| /* FIXME this is temporary, just to have something to test how bad graphics handler is */ |
| void ME_InsertGraphicsFromCursor(ME_TextEditor *editor, int nCursor) |
| { |
| ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor); |
| WCHAR space = ' '; |
| |
| /* FIXME no no no */ |
| if (ME_IsSelection(editor)) |
| ME_DeleteSelection(editor); |
| |
| ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle, |
| MERF_GRAPHICS); |
| ME_SendSelChange(editor); |
| } |
| |
| |
| void |
| ME_InsertTableCellFromCursor(ME_TextEditor *editor, int nCursor) |
| { |
| WCHAR tab = '\t'; |
| ME_DisplayItem *p, *run; |
| ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor); |
| |
| p = ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, pStyle, |
| MERF_CELL); |
| run = p; |
| while ((run = ME_FindItemBack(run, diRunOrParagraph))->type == diRun) |
| { |
| if (run->member.run.nFlags & MERF_CELL) |
| { |
| assert(run->member.run.pCell->next); |
| p->member.run.pCell = run->member.run.pCell->next; |
| return; |
| } |
| } |
| assert(run->type == diParagraph); |
| assert(run->member.para.bTable); |
| assert(run->member.para.pCells); |
| p->member.run.pCell = run->member.para.pCells; |
| } |
| |
| |
| void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor, |
| const WCHAR *str, int len, ME_Style *style) |
| { |
| const WCHAR *pos; |
| ME_Cursor *p = NULL; |
| int oldLen; |
| |
| /* FIXME really HERE ? */ |
| if (ME_IsSelection(editor)) |
| ME_DeleteSelection(editor); |
| |
| /* FIXME: is this too slow? */ |
| /* Didn't affect performance for WM_SETTEXT (around 50sec/30K) */ |
| oldLen = ME_GetTextLength(editor); |
| |
| /* text operations set modified state */ |
| editor->nModifyStep = 1; |
| |
| assert(style); |
| |
| assert(nCursor>=0 && nCursor<editor->nCursors); |
| if (len == -1) |
| len = lstrlenW(str); |
| |
| /* grow the text limit to fit our text */ |
| if(editor->nTextLimit < oldLen +len) |
| editor->nTextLimit = oldLen + len; |
| |
| while (len) |
| { |
| pos = str; |
| /* FIXME this sucks - no respect for unicode (what else can be a line separator in unicode?) */ |
| while(pos-str < len && *pos != '\r' && *pos != '\n' && *pos != '\t') |
| pos++; |
| if (pos-str < len && *pos == '\t') { /* handle tabs */ |
| WCHAR tab = '\t'; |
| |
| if (pos!=str) |
| ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0); |
| |
| ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB); |
| |
| pos++; |
| if(pos-str <= len) { |
| len -= pos - str; |
| str = pos; |
| continue; |
| } |
| } |
| /* handle special \r\r\n sequence (richedit 2.x and higher only) */ |
| if (!editor->bEmulateVersion10 && pos-str < len-2 && pos[0] == '\r' && pos[1] == '\r' && pos[2] == '\n') { |
| WCHAR space = ' '; |
| |
| if (pos!=str) |
| ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0); |
| |
| ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0); |
| |
| pos+=3; |
| if(pos-str <= len) { |
| len -= pos - str; |
| str = pos; |
| continue; |
| } |
| } |
| if (pos-str < len) { /* handle EOLs */ |
| ME_DisplayItem *tp, *end_run; |
| ME_Style *tmp_style; |
| if (pos!=str) |
| ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0); |
| p = &editor->pCursors[nCursor]; |
| if (p->nOffset) { |
| ME_SplitRunSimple(editor, p->pRun, p->nOffset); |
| p = &editor->pCursors[nCursor]; |
| } |
| tmp_style = ME_GetInsertStyle(editor, nCursor); |
| /* ME_SplitParagraph increases style refcount */ |
| tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style); |
| p->pRun = ME_FindItemFwd(tp, diRun); |
| end_run = ME_FindItemBack(tp, diRun); |
| ME_ReleaseStyle(end_run->member.run.style); |
| end_run->member.run.style = tmp_style; |
| p->nOffset = 0; |
| if(pos-str < len && *pos =='\r') |
| pos++; |
| if(pos-str < len && *pos =='\n') |
| pos++; |
| if(pos-str <= len) { |
| len -= pos - str; |
| str = pos; |
| continue; |
| } |
| } |
| ME_InternalInsertTextFromCursor(editor, nCursor, str, len, style, 0); |
| len = 0; |
| } |
| } |
| |
| |
| static BOOL |
| ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs) |
| { |
| ME_DisplayItem *pRun = pCursor->pRun; |
| |
| if (nRelOfs == -1) |
| { |
| if (!pCursor->nOffset) |
| { |
| do { |
| pRun = ME_FindItemBack(pRun, diRunOrParagraph); |
| assert(pRun); |
| switch (pRun->type) |
| { |
| case diRun: |
| break; |
| case diParagraph: |
| if (pRun->member.para.prev_para->type == diTextStart) |
| return FALSE; |
| pRun = ME_FindItemBack(pRun, diRunOrParagraph); |
| /* every paragraph ought to have at least one run */ |
| assert(pRun && pRun->type == diRun); |
| assert(pRun->member.run.nFlags & MERF_ENDPARA); |
| break; |
| default: |
| assert(pRun->type != diRun && pRun->type != diParagraph); |
| return FALSE; |
| } |
| } while (RUN_IS_HIDDEN(&pRun->member.run)); |
| pCursor->pRun = pRun; |
| if (pRun->member.run.nFlags & MERF_ENDPARA) |
| pCursor->nOffset = 0; |
| else |
| pCursor->nOffset = pRun->member.run.strText->nLen; |
| } |
| |
| if (pCursor->nOffset) |
| pCursor->nOffset = ME_StrRelPos2(pCursor->pRun->member.run.strText, pCursor->nOffset, nRelOfs); |
| return TRUE; |
| } |
| else |
| { |
| if (!(pRun->member.run.nFlags & MERF_ENDPARA)) |
| { |
| int new_ofs = ME_StrRelPos2(pRun->member.run.strText, pCursor->nOffset, nRelOfs); |
| |
| if (new_ofs < pRun->member.run.strText->nLen) |
| { |
| pCursor->nOffset = new_ofs; |
| return TRUE; |
| } |
| } |
| do { |
| pRun = ME_FindItemFwd(pRun, diRun); |
| } while (pRun && RUN_IS_HIDDEN(&pRun->member.run)); |
| if (pRun) |
| { |
| pCursor->pRun = pRun; |
| pCursor->nOffset = 0; |
| return TRUE; |
| } |
| } |
| return FALSE; |
| } |
| |
| |
| 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; |
| y += ME_GetYScrollPos(editor); |
| 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]; |
| /* FIXME: do something with the return value of ME_FindPixelPos */ |
| ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd); |
| |
| 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_ScrollUp(editor, ys-yprev); |
| } |
| 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_ScrollUp(editor,ys-yprev); |
| } |
| 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); |
| /* bCaretAtEnd doesn't make sense if the cursor isn't set at the |
| first character of the next row */ |
| assert(!editor->bCaretAtEnd || !pCursor->nOffset); |
| ME_WrapMarkedParagraphs(editor); |
| 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, const 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; |
| |
| ME_CheckCharOffsets(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; |
| |
| ME_InvalidateSelection(editor); |
| ME_Repaint(editor); |
| HideCaret(editor->hWnd); |
| ME_EnsureVisible(editor, tmp_curs.pRun); |
| ME_ShowCaret(editor); |
| ME_SendSelChange(editor); |
| return success; |
| } |
