--- /dev/null
+/*
+ * 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);
+
+void ME_SetCursorToStart(ME_TextEditor *editor, ME_Cursor *cursor)
+{
+ cursor->pPara = editor->pBuffer->pFirst->member.para.next_para;
+ cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun);
+ cursor->nOffset = 0;
+}
+
+static void ME_SetCursorToEnd(ME_TextEditor *editor, ME_Cursor *cursor, BOOL final_eop)
+{
+ cursor->pPara = editor->pBuffer->pLast->member.para.prev_para;
+ cursor->pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
+ cursor->nOffset = final_eop ? cursor->pRun->member.run.len : 0;
+}
+
+
+int ME_GetSelectionOfs(ME_TextEditor *editor, int *from, int *to)
+{
+ *from = ME_GetCursorOfs(&editor->pCursors[0]);
+ *to = ME_GetCursorOfs(&editor->pCursors[1]);
+
+ if (*from > *to)
+ {
+ int tmp = *from;
+ *from = *to;
+ *to = tmp;
+ return 1;
+ }
+ return 0;
+}
+
+int ME_GetSelection(ME_TextEditor *editor, ME_Cursor **from, ME_Cursor **to)
+{
+ int from_ofs = ME_GetCursorOfs( &editor->pCursors[0] );
+ int to_ofs = ME_GetCursorOfs( &editor->pCursors[1] );
+ BOOL swap = (from_ofs > to_ofs);
+
+ if (from_ofs == to_ofs)
+ {
+ /* If cursor[0] is at the beginning of a run and cursor[1] at the end
+ of the prev run then we need to swap. */
+ if (editor->pCursors[0].nOffset < editor->pCursors[1].nOffset)
+ swap = TRUE;
+ }
+
+ if (!swap)
+ {
+ *from = &editor->pCursors[0];
+ *to = &editor->pCursors[1];
+ return 0;
+ } else {
+ *from = &editor->pCursors[1];
+ *to = &editor->pCursors[0];
+ return 1;
+ }
+}
+
+int ME_GetTextLength(ME_TextEditor *editor)
+{
+ ME_Cursor cursor;
+ ME_SetCursorToEnd(editor, &cursor, FALSE);
+ return ME_GetCursorOfs(&cursor);
+}
+
+
+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 ((editor->styleFlags & ES_MULTILINE)
+ && (how->flags & GTL_USECRLF)
+ && !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */
+ length += editor->nParagraphs - 1;
+
+ if (how->flags & GTL_NUMBYTES ||
+ (how->flags & GTL_PRECISE && /* GTL_PRECISE seems to imply GTL_NUMBYTES */
+ !(how->flags & GTL_NUMCHARS))) /* unless GTL_NUMCHARS is given */
+ {
+ 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)
+ {
+ ME_SetCursorToStart(editor, &editor->pCursors[1]);
+ ME_SetCursorToEnd(editor, &editor->pCursors[0], TRUE);
+ ME_InvalidateSelection(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_GetSelectionOfs(editor, &start, &end);
+ if (start != end)
+ {
+ if (end > len)
+ {
+ editor->pCursors[0].nOffset = 0;
+ end --;
+ }
+ editor->pCursors[1] = editor->pCursors[0];
+ ME_Repaint(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)
+ {
+ ME_SetCursorToEnd(editor, &editor->pCursors[0], FALSE);
+ editor->pCursors[1] = editor->pCursors[0];
+ ME_InvalidateSelection(editor);
+ return len;
+ }
+
+ ME_CursorFromCharOfs(editor, from, &editor->pCursors[1]);
+ editor->pCursors[0] = editor->pCursors[1];
+ ME_MoveCursorChars(editor, &editor->pCursors[0], to - from, FALSE);
+ /* Selection is not allowed in the middle of an end paragraph run. */
+ if (editor->pCursors[1].pRun->member.run.nFlags & MERF_ENDPARA)
+ editor->pCursors[1].nOffset = 0;
+ if (editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA)
+ {
+ if (to > len)
+ editor->pCursors[0].nOffset = editor->pCursors[0].pRun->member.run.len;
+ else
+ editor->pCursors[0].nOffset = 0;
+ }
+ return to;
+}
+
+
+void ME_GetCursorCoordinates(ME_TextEditor *editor, ME_Cursor *pCursor,
+ int *x, int *y, int *height)
+{
+ ME_DisplayItem *row;
+ ME_DisplayItem *run = pCursor->pRun;
+ ME_DisplayItem *para = pCursor->pPara;
+ ME_DisplayItem *pSizeRun = run;
+ ME_Context c;
+ int run_x;
+
+ assert(height && x && y);
+ assert(~para->member.para.nFlags & MEPF_REWRAP);
+ assert(run && run->type == diRun);
+ assert(para && para->type == diParagraph);
+
+ row = ME_FindItemBack(run, diStartRowOrParagraph);
+ assert(row && row->type == diStartRow);
+
+ ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
+
+ if (!pCursor->nOffset)
+ {
+ ME_DisplayItem *prev = ME_FindItemBack(run, diRunOrParagraph);
+ assert(prev);
+ if (prev->type == diRun)
+ pSizeRun = prev;
+ }
+ 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);
+ }
+ }
+ run_x = ME_PointFromCharContext( &c, &run->member.run, pCursor->nOffset, TRUE );
+
+ *height = pSizeRun->member.run.nAscent + pSizeRun->member.run.nDescent;
+ *x = c.rcView.left + run->member.run.pt.x + run_x - editor->horz_si.nPos;
+ *y = c.rcView.top + para->member.para.pt.y + row->member.row.nBaseline
+ + run->member.run.pt.y - pSizeRun->member.run.nAscent
+ - editor->vert_si.nPos;
+ ME_DestroyContext(&c);
+ return;
+}
+
+
+void
+ME_MoveCaret(ME_TextEditor *editor)
+{
+ int x, y, height;
+
+ ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
+ if(editor->bHaveFocus && !ME_IsSelection(editor))
+ {
+ x = min(x, editor->rcFormat.right-1);
+ ITextHost_TxCreateCaret(editor->texthost, NULL, 0, height);
+ ITextHost_TxSetCaretPos(editor->texthost, x, y);
+ }
+}
+
+
+void ME_ShowCaret(ME_TextEditor *ed)
+{
+ ME_MoveCaret(ed);
+ if(ed->bHaveFocus && !ME_IsSelection(ed))
+ ITextHost_TxShowCaret(ed->texthost, TRUE);
+}
+
+void ME_HideCaret(ME_TextEditor *ed)
+{
+ if(!ed->bHaveFocus || ME_IsSelection(ed))
+ {
+ ITextHost_TxShowCaret(ed->texthost, FALSE);
+ DestroyCaret();
+ }
+}
+
+BOOL ME_InternalDeleteText(ME_TextEditor *editor, ME_Cursor *start,
+ int nChars, BOOL bForce)
+{
+ ME_Cursor c = *start;
+ int nOfs = ME_GetCursorOfs(start), text_len = ME_GetTextLength( editor );
+ int shift = 0;
+ int totalChars = nChars;
+ ME_DisplayItem *start_para;
+ BOOL delete_all = FALSE;
+
+ /* Prevent deletion past last end of paragraph run. */
+ nChars = min(nChars, text_len - nOfs);
+ if (nChars == text_len) delete_all = TRUE;
+ start_para = c.pPara;
+
+ if (!bForce)
+ {
+ ME_ProtectPartialTableDeletion(editor, &c, &nChars);
+ if (nChars == 0)
+ return FALSE;
+ }
+
+ while(nChars > 0)
+ {
+ ME_Run *run;
+ ME_CursorFromCharOfs(editor, nOfs+nChars, &c);
+ if (!c.nOffset &&
+ nOfs+nChars == (c.pRun->member.run.nCharOfs
+ + c.pPara->member.para.nCharOfs))
+ {
+ /* We aren't deleting anything in this run, so we will go back to the
+ * last run we are deleting text in. */
+ ME_PrevRun(&c.pPara, &c.pRun, TRUE);
+ c.nOffset = c.pRun->member.run.len;
+ }
+ run = &c.pRun->member.run;
+ if (run->nFlags & MERF_ENDPARA) {
+ int eollen = c.pRun->member.run.len;
+ BOOL keepFirstParaFormat;
+
+ if (!ME_FindItemFwd(c.pRun, diParagraph))
+ {
+ return TRUE;
+ }
+ keepFirstParaFormat = (totalChars == nChars && nChars <= eollen &&
+ run->nCharOfs);
+ if (!editor->bEmulateVersion10) /* v4.1 */
+ {
+ ME_DisplayItem *next_para = ME_FindItemFwd(c.pRun, diParagraphOrEnd);
+ ME_DisplayItem *this_para = next_para->member.para.prev_para;
+
+ /* The end of paragraph before a table row is only deleted if there
+ * is nothing else on the line before it. */
+ if (this_para == start_para &&
+ next_para->member.para.nFlags & MEPF_ROWSTART)
+ {
+ /* If the paragraph will be empty, then it should be deleted, however
+ * it still might have text right now which would inherit the
+ * MEPF_STARTROW property if we joined it right now.
+ * Instead we will delete it after the preceding text is deleted. */
+ if (nOfs > this_para->member.para.nCharOfs) {
+ /* Skip this end of line. */
+ nChars -= (eollen < nChars) ? eollen : nChars;
+ continue;
+ }
+ keepFirstParaFormat = TRUE;
+ }
+ }
+ ME_JoinParagraphs(editor, c.pPara, keepFirstParaFormat);
+ /* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
+ ME_CheckCharOffsets(editor);
+ nChars -= (eollen < nChars) ? eollen : nChars;
+ continue;
+ }
+ else
+ {
+ ME_Cursor cursor;
+ int nCharsToDelete = min(nChars, c.nOffset);
+ int i;
+
+ c.nOffset -= nCharsToDelete;
+
+ ME_FindItemBack(c.pRun, diParagraph)->member.para.nFlags |= MEPF_REWRAP;
+
+ cursor = c;
+ /* nChars is the number of characters that should be deleted from the
+ PRECEDING runs (these BEFORE cursor.pRun)
+ nCharsToDelete is a number of chars to delete from THIS run */
+ nChars -= nCharsToDelete;
+ shift -= nCharsToDelete;
+ TRACE("Deleting %d (remaining %d) chars at %d in %s (%d)\n",
+ nCharsToDelete, nChars, c.nOffset,
+ debugstr_run( run ), run->len);
+
+ /* nOfs is a character offset (from the start of the document
+ to the current (deleted) run */
+ add_undo_insert_run( editor, nOfs + nChars, get_text( run, c.nOffset ), nCharsToDelete, run->nFlags, run->style );
+
+ ME_StrDeleteV(run->para->text, run->nCharOfs + c.nOffset, nCharsToDelete);
+ run->len -= nCharsToDelete;
+ TRACE("Post deletion string: %s (%d)\n", debugstr_run( run ), run->len);
+ TRACE("Shift value: %d\n", shift);
+
+ /* 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 <= run->len);
+ }
+ if (pThisCur->nOffset == run->len)
+ {
+ 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 (!cursor.pRun->member.run.len)
+ {
+ TRACE("Removing empty run\n");
+ ME_Remove(cursor.pRun);
+ ME_DestroyDisplayItem(cursor.pRun);
+ }
+
+ shift = 0;
+ /*
+ ME_CheckCharOffsets(editor);
+ */
+ continue;
+ }
+ }
+ if (delete_all) ME_SetDefaultParaFormat( editor, &start_para->member.para.fmt );
+ return TRUE;
+}
+
+BOOL ME_DeleteTextAtCursor(ME_TextEditor *editor, int nCursor, int nChars)
+{
+ assert(nCursor>=0 && nCursor<editor->nCursors);
+ /* text operations set modified state */
+ editor->nModifyStep = 1;
+ return ME_InternalDeleteText(editor, &editor->pCursors[nCursor],
+ nChars, FALSE);
+}
+
+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);
+}
+
+
+void ME_InsertOLEFromCursor(ME_TextEditor *editor, const REOBJECT* reo, int nCursor)
+{
+ ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
+ ME_DisplayItem *di;
+ WCHAR space = ' ';
+
+ /* FIXME no no no */
+ if (ME_IsSelection(editor))
+ ME_DeleteSelection(editor);
+
+ di = ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, pStyle,
+ MERF_GRAPHICS);
+ di->member.run.ole_obj = ALLOC_OBJ(*reo);
+ ME_CopyReObject(di->member.run.ole_obj, reo);
+ ME_ReleaseStyle(pStyle);
+}
+
+
+void ME_InsertEndRowFromCursor(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_ENDROW);
+ ME_ReleaseStyle(pStyle);
+}
+
+
+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;
+
+ pos = str;
+
+ while (len)
+ {
+ /* 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) { /* handle text */
+ ME_InternalInsertTextFromCursor(editor, nCursor, str, pos-str, style, 0);
+ } else if (*pos == '\t') { /* handle tabs */
+ WCHAR tab = '\t';
+ ME_InternalInsertTextFromCursor(editor, nCursor, &tab, 1, style, MERF_TAB);
+ pos++;
+ } else { /* handle EOLs */
+ ME_DisplayItem *tp, *end_run, *run, *prev;
+ int eol_len = 0;
+
+ /* Find number of CR and LF in end of paragraph run */
+ if (*pos =='\r')
+ {
+ if (len > 1 && pos[1] == '\n')
+ eol_len = 2;
+ else if (len > 2 && pos[1] == '\r' && pos[2] == '\n')
+ eol_len = 3;
+ else
+ eol_len = 1;
+ } else {
+ assert(*pos == '\n');
+ eol_len = 1;
+ }
+ pos += eol_len;
+
+ if (!editor->bEmulateVersion10 && eol_len == 3)
+ {
+ /* handle special \r\r\n sequence (richedit 2.x and higher only) */
+ WCHAR space = ' ';
+ ME_InternalInsertTextFromCursor(editor, nCursor, &space, 1, style, 0);
+ } else {
+ const WCHAR cr = '\r', *eol_str = str;
+
+ if (!editor->bEmulateVersion10)
+ {
+ eol_str = &cr;
+ eol_len = 1;
+ }
+
+ p = &editor->pCursors[nCursor];
+
+ if (p->nOffset == p->pRun->member.run.len)
+ {
+ run = ME_FindItemFwd( p->pRun, diRun );
+ if (!run) run = p->pRun;
+ }
+ else
+ {
+ if (p->nOffset) ME_SplitRunSimple(editor, p);
+ run = p->pRun;
+ }
+
+ tp = ME_SplitParagraph(editor, run, style, eol_str, eol_len, 0);
+
+ end_run = ME_FindItemBack(tp, diRun);
+
+ /* Move any cursors that were at the end of the previous run to the beginning of the new para */
+ prev = ME_FindItemBack( end_run, diRun );
+ if (prev)
+ {
+ int i;
+ for (i = 0; i < editor->nCursors; i++)
+ {
+ if (editor->pCursors[i].pRun == prev &&
+ editor->pCursors[i].nOffset == prev->member.run.len)
+ {
+ editor->pCursors[i].pPara = tp;
+ editor->pCursors[i].pRun = run;
+ editor->pCursors[i].nOffset = 0;
+ }
+ }
+ }
+
+ }
+ }
+ len -= pos - str;
+ str = pos;
+ }
+}
+
+/* Move the cursor nRelOfs characters (either forwards or backwards)
+ * If final_eop is TRUE, allow moving the cursor to the end of the final eop.
+ *
+ * returns the actual number of characters moved.
+ **/
+int ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs, BOOL final_eop)
+{
+ cursor->nOffset += nRelOfs;
+ if (cursor->nOffset < 0)
+ {
+ cursor->nOffset += cursor->pRun->member.run.nCharOfs;
+ if (cursor->nOffset >= 0)
+ {
+ /* new offset in the same paragraph */
+ do {
+ cursor->pRun = ME_FindItemBack(cursor->pRun, diRun);
+ } while (cursor->nOffset < cursor->pRun->member.run.nCharOfs);
+ cursor->nOffset -= cursor->pRun->member.run.nCharOfs;
+ return nRelOfs;
+ }
+
+ cursor->nOffset += cursor->pPara->member.para.nCharOfs;
+ if (cursor->nOffset <= 0)
+ {
+ /* moved to the start of the text */
+ nRelOfs -= cursor->nOffset;
+ ME_SetCursorToStart(editor, cursor);
+ return nRelOfs;
+ }
+
+ /* new offset in a previous paragraph */
+ do {
+ cursor->pPara = cursor->pPara->member.para.prev_para;
+ } while (cursor->nOffset < cursor->pPara->member.para.nCharOfs);
+ cursor->nOffset -= cursor->pPara->member.para.nCharOfs;
+
+ cursor->pRun = ME_FindItemBack(cursor->pPara->member.para.next_para, diRun);
+ while (cursor->nOffset < cursor->pRun->member.run.nCharOfs) {
+ cursor->pRun = ME_FindItemBack(cursor->pRun, diRun);
+ }
+ cursor->nOffset -= cursor->pRun->member.run.nCharOfs;
+ } else if (cursor->nOffset >= cursor->pRun->member.run.len) {
+ ME_DisplayItem *next_para;
+ int new_offset;
+
+ new_offset = ME_GetCursorOfs(cursor);
+ next_para = cursor->pPara->member.para.next_para;
+ if (new_offset < next_para->member.para.nCharOfs)
+ {
+ /* new offset in the same paragraph */
+ do {
+ cursor->nOffset -= cursor->pRun->member.run.len;
+ cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun);
+ } while (cursor->nOffset >= cursor->pRun->member.run.len);
+ return nRelOfs;
+ }
+
+ if (new_offset >= ME_GetTextLength(editor) + (final_eop ? 1 : 0))
+ {
+ /* new offset at the end of the text */
+ ME_SetCursorToEnd(editor, cursor, final_eop);
+ nRelOfs -= new_offset - (ME_GetTextLength(editor) + (final_eop ? 1 : 0));
+ return nRelOfs;
+ }
+
+ /* new offset in a following paragraph */
+ do {
+ cursor->pPara = next_para;
+ next_para = next_para->member.para.next_para;
+ } while (new_offset >= next_para->member.para.nCharOfs);
+
+ cursor->nOffset = new_offset - cursor->pPara->member.para.nCharOfs;
+ cursor->pRun = ME_FindItemFwd(cursor->pPara, diRun);
+ while (cursor->nOffset >= cursor->pRun->member.run.len)
+ {
+ cursor->nOffset -= cursor->pRun->member.run.len;
+ cursor->pRun = ME_FindItemFwd(cursor->pRun, diRun);
+ }
+ } /* else new offset is in the same run */
+ return nRelOfs;
+}
+
+
+BOOL
+ME_MoveCursorWords(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
+{
+ ME_DisplayItem *pRun = cursor->pRun, *pOtherRun;
+ ME_DisplayItem *pPara = cursor->pPara;
+ int nOffset = cursor->nOffset;
+
+ if (nRelOfs == -1)
+ {
+ /* Backward movement */
+ while (TRUE)
+ {
+ nOffset = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
+ pRun->member.run.len, nOffset, WB_MOVEWORDLEFT);
+ if (nOffset)
+ break;
+ pOtherRun = ME_FindItemBack(pRun, diRunOrParagraph);
+ if (pOtherRun->type == diRun)
+ {
+ if (ME_CallWordBreakProc(editor, get_text( &pOtherRun->member.run, 0 ),
+ pOtherRun->member.run.len,
+ pOtherRun->member.run.len - 1,
+ WB_ISDELIMITER)
+ && !(pRun->member.run.nFlags & MERF_ENDPARA)
+ && !(cursor->pRun == pRun && cursor->nOffset == 0)
+ && !ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
+ pRun->member.run.len, 0,
+ WB_ISDELIMITER))
+ break;
+ pRun = pOtherRun;
+ nOffset = pOtherRun->member.run.len;
+ }
+ else if (pOtherRun->type == diParagraph)
+ {
+ if (cursor->pRun == pRun && cursor->nOffset == 0)
+ {
+ pPara = pOtherRun;
+ /* Skip empty start of table row paragraph */
+ if (pPara->member.para.prev_para->member.para.nFlags & MEPF_ROWSTART)
+ pPara = pPara->member.para.prev_para;
+ /* Paragraph breaks are treated as separate words */
+ if (pPara->member.para.prev_para->type == diTextStart)
+ return FALSE;
+
+ pRun = ME_FindItemBack(pPara, diRun);
+ pPara = pPara->member.para.prev_para;
+ }
+ break;
+ }
+ }
+ }
+ else
+ {
+ /* Forward movement */
+ BOOL last_delim = FALSE;
+
+ while (TRUE)
+ {
+ if (last_delim && !ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
+ pRun->member.run.len, nOffset, WB_ISDELIMITER))
+ break;
+ nOffset = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
+ pRun->member.run.len, nOffset, WB_MOVEWORDRIGHT);
+ if (nOffset < pRun->member.run.len)
+ break;
+ pOtherRun = ME_FindItemFwd(pRun, diRunOrParagraphOrEnd);
+ if (pOtherRun->type == diRun)
+ {
+ last_delim = ME_CallWordBreakProc(editor, get_text( &pRun->member.run, 0 ),
+ pRun->member.run.len, nOffset - 1, WB_ISDELIMITER);
+ pRun = pOtherRun;
+ nOffset = 0;
+ }
+ else if (pOtherRun->type == diParagraph)
+ {
+ if (pOtherRun->member.para.nFlags & MEPF_ROWSTART)
+ pOtherRun = pOtherRun->member.para.next_para;
+ if (cursor->pRun == pRun) {
+ pPara = pOtherRun;
+ pRun = ME_FindItemFwd(pPara, diRun);
+ }
+ nOffset = 0;
+ break;
+ }
+ else /* diTextEnd */
+ {
+ if (cursor->pRun == pRun)
+ return FALSE;
+ nOffset = 0;
+ break;
+ }
+ }
+ }
+ cursor->pPara = pPara;
+ cursor->pRun = pRun;
+ cursor->nOffset = nOffset;
+ return TRUE;
+}
+
+
+static void
+ME_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
+{
+ /* pCursor[0] is the end of the selection
+ * pCursor[1] is the start of the selection (or the position selection anchor)
+ * pCursor[2] and [3] are the selection anchors that are backed up
+ * so they are kept when the selection changes for drag selection.
+ */
+
+ editor->nSelectionType = selectionType;
+ switch(selectionType)
+ {
+ case stPosition:
+ break;
+ case stWord:
+ ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
+ editor->pCursors[1] = editor->pCursors[0];
+ ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
+ break;
+ case stLine:
+ case stParagraph:
+ {
+ ME_DisplayItem *pItem;
+ ME_DIType fwdSearchType, backSearchType;
+ if (selectionType == stParagraph) {
+ backSearchType = diParagraph;
+ fwdSearchType = diParagraphOrEnd;
+ } else {
+ backSearchType = diStartRow;
+ fwdSearchType = diStartRowOrParagraphOrEnd;
+ }
+ pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType);
+ assert(pItem);
+ if (pItem->type == diTextEnd)
+ editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
+ else
+ editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
+ editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
+ editor->pCursors[0].nOffset = 0;
+
+ pItem = ME_FindItemBack(pItem, backSearchType);
+ editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
+ editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
+ editor->pCursors[1].nOffset = 0;
+ break;
+ }
+ case stDocument:
+ /* Select everything with cursor anchored from the start of the text */
+ editor->nSelectionType = stDocument;
+ ME_SetCursorToStart(editor, &editor->pCursors[1]);
+ ME_SetCursorToEnd(editor, &editor->pCursors[0], FALSE);
+ break;
+ default: assert(0);
+ }
+ /* Store the anchor positions for extending the selection. */
+ editor->pCursors[2] = editor->pCursors[0];
+ editor->pCursors[3] = editor->pCursors[1];
+}
+
+int ME_GetCursorOfs(const ME_Cursor *cursor)
+{
+ return cursor->pPara->member.para.nCharOfs
+ + cursor->pRun->member.run.nCharOfs + cursor->nOffset;
+}
+
+/* Helper function for ME_FindPixelPos to find paragraph within tables */
+static ME_DisplayItem* ME_FindPixelPosInTableRow(int x, int y,
+ ME_DisplayItem *para)
+{
+ ME_DisplayItem *cell, *next_cell;
+ assert(para->member.para.nFlags & MEPF_ROWSTART);
+ cell = para->member.para.next_para->member.para.pCell;
+ assert(cell);
+
+ /* find the cell we are in */
+ while ((next_cell = cell->member.cell.next_cell) != NULL) {
+ if (x < next_cell->member.cell.pt.x)
+ {
+ para = ME_FindItemFwd(cell, diParagraph);
+ /* Found the cell, but there might be multiple paragraphs in
+ * the cell, so need to search down the cell for the paragraph. */
+ while (cell == para->member.para.pCell) {
+ if (y < para->member.para.pt.y + para->member.para.nHeight)
+ {
+ if (para->member.para.nFlags & MEPF_ROWSTART)
+ return ME_FindPixelPosInTableRow(x, y, para);
+ else
+ return para;
+ }
+ para = para->member.para.next_para;
+ }
+ /* Past the end of the cell, so go back to the last cell paragraph */
+ return para->member.para.prev_para;
+ }
+ cell = next_cell;
+ }
+ /* Return table row delimiter */
+ para = ME_FindItemFwd(cell, diParagraph);
+ assert(para->member.para.nFlags & MEPF_ROWEND);
+ assert(para->member.para.fmt.dwMask & PFM_TABLEROWDELIMITER);
+ assert(para->member.para.fmt.wEffects & PFE_TABLEROWDELIMITER);
+ return para;
+}
+
+static BOOL ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
+ int x, ME_Cursor *cursor, BOOL *pbCaretAtEnd)
+{
+ ME_DisplayItem *pNext, *pLastRun;
+ ME_Row *row = &pRow->member.row;
+ BOOL exact = TRUE;
+
+ if (x < row->pt.x)
+ {
+ x = row->pt.x;
+ exact = FALSE;
+ }
+ pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
+ assert(pNext->type == diRun);
+ if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
+ cursor->nOffset = 0;
+ do {
+ int run_x = pNext->member.run.pt.x;
+ int width = pNext->member.run.nWidth;
+
+ if (x >= run_x && x < run_x+width)
+ {
+ cursor->nOffset = ME_CharFromPoint(editor, x-run_x, &pNext->member.run, TRUE, TRUE);
+ cursor->pRun = pNext;
+ cursor->pPara = ME_GetParagraph( cursor->pRun );
+ return exact;
+ }
+ pLastRun = pNext;
+ pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
+ } while(pNext && pNext->type == diRun);
+
+ if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
+ {
+ cursor->pRun = ME_FindItemFwd(pNext, diRun);
+ if (pbCaretAtEnd) *pbCaretAtEnd = TRUE;
+ }
+ else
+ cursor->pRun = pLastRun;
+
+ cursor->pPara = ME_GetParagraph( cursor->pRun );
+ return FALSE;
+}
+
+/* Finds the run and offset from the pixel position.
+ *
+ * x & y are pixel positions in virtual coordinates into the rich edit control,
+ * so client coordinates must first be adjusted by the scroll position.
+ *
+ * If final_eop is TRUE consider the final end-of-paragraph.
+ *
+ * returns TRUE if the result was exactly under the cursor, otherwise returns
+ * FALSE, and result is set to the closest position to the coordinates.
+ */
+static BOOL ME_FindPixelPos(ME_TextEditor *editor, int x, int y,
+ ME_Cursor *result, BOOL *is_eol, BOOL final_eop)
+{
+ ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
+ BOOL isExact = TRUE;
+
+ x -= editor->rcFormat.left;
+ y -= editor->rcFormat.top;
+
+ if (is_eol)
+ *is_eol = FALSE;
+
+ /* find paragraph */
+ for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
+ {
+ assert(p->type == diParagraph);
+ if (y < p->member.para.pt.y + p->member.para.nHeight)
+ {
+ if (p->member.para.nFlags & MEPF_ROWSTART)
+ p = ME_FindPixelPosInTableRow(x, y, p);
+ y -= p->member.para.pt.y;
+ p = ME_FindItemFwd(p, diStartRow);
+ break;
+ } else if (p->member.para.nFlags & MEPF_ROWSTART) {
+ p = ME_GetTableRowEnd(p);
+ }
+ }
+ /* find row */
+ for (; p != editor->pBuffer->pLast; )
+ {
+ ME_DisplayItem *pp;
+ assert(p->type == diStartRow);
+ if (y < p->member.row.pt.y + p->member.row.nHeight) break;
+ pp = ME_FindItemFwd(p, diStartRow);
+ if (!pp) break;
+ p = pp;
+ }
+ if (p == editor->pBuffer->pLast && !final_eop)
+ {
+ /* The position is below the last paragraph, so the last row will be used
+ * rather than the end of the text, so the x position will be used to
+ * determine the offset closest to the pixel position. */
+ isExact = FALSE;
+ p = ME_FindItemBack(p, diStartRow);
+ if (!p) p = editor->pBuffer->pLast;
+ }
+
+ assert( p->type == diStartRow || p == editor->pBuffer->pLast );
+
+ if( p->type == diStartRow )
+ return ME_FindRunInRow( editor, p, x, result, is_eol ) && isExact;
+
+ ME_SetCursorToEnd(editor, result, TRUE);
+ return FALSE;
+}
+
+
+/* Sets the cursor to the position closest to the pixel position
+ *
+ * x & y are pixel positions in client coordinates.
+ *
+ * isExact will be set to TRUE if the run is directly under the pixel
+ * position, FALSE if it not, unless isExact is set to NULL.
+ *
+ * return FALSE if outside client area and the cursor is not set,
+ * otherwise TRUE is returned.
+ */
+BOOL ME_CharFromPos(ME_TextEditor *editor, int x, int y,
+ ME_Cursor *cursor, BOOL *isExact)
+{
+ RECT rc;
+ BOOL bResult;
+
+ ITextHost_TxGetClientRect(editor->texthost, &rc);
+ if (x < 0 || y < 0 || x >= rc.right || y >= rc.bottom) {
+ if (isExact) *isExact = FALSE;
+ return FALSE;
+ }
+ x += editor->horz_si.nPos;
+ y += editor->vert_si.nPos;
+ bResult = ME_FindPixelPos(editor, x, y, cursor, NULL, FALSE);
+ if (isExact) *isExact = bResult;
+ return TRUE;
+}
+
+
+
+/* Extends the selection with a word, line, or paragraph selection type.
+ *
+ * The selection is anchored by editor->pCursors[2-3] such that the text
+ * between the anchors will remain selected, and one end will be extended.
+ *
+ * editor->pCursors[0] should have the position to extend the selection to
+ * before this function is called.
+ *
+ * Nothing will be done if editor->nSelectionType equals stPosition.
+ */
+static void ME_ExtendAnchorSelection(ME_TextEditor *editor)
+{
+ ME_Cursor tmp_cursor;
+ int curOfs, anchorStartOfs, anchorEndOfs;
+ if (editor->nSelectionType == stPosition || editor->nSelectionType == stDocument)
+ return;
+ curOfs = ME_GetCursorOfs(&editor->pCursors[0]);
+ anchorStartOfs = ME_GetCursorOfs(&editor->pCursors[3]);
+ anchorEndOfs = ME_GetCursorOfs(&editor->pCursors[2]);
+
+ tmp_cursor = editor->pCursors[0];
+ editor->pCursors[0] = editor->pCursors[2];
+ editor->pCursors[1] = editor->pCursors[3];
+ if (curOfs < anchorStartOfs)
+ {
+ /* Extend the left side of selection */
+ editor->pCursors[1] = tmp_cursor;
+ if (editor->nSelectionType == stWord)
+ ME_MoveCursorWords(editor, &editor->pCursors[1], -1);
+ else
+ {
+ ME_DisplayItem *pItem;
+ ME_DIType searchType = ((editor->nSelectionType == stLine) ?
+ diStartRowOrParagraph:diParagraph);
+ pItem = ME_FindItemBack(editor->pCursors[1].pRun, searchType);
+ editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
+ editor->pCursors[1].pPara = ME_GetParagraph(editor->pCursors[1].pRun);
+ editor->pCursors[1].nOffset = 0;
+ }
+ }
+ else if (curOfs >= anchorEndOfs)
+ {
+ /* Extend the right side of selection */
+ editor->pCursors[0] = tmp_cursor;
+ if (editor->nSelectionType == stWord)
+ ME_MoveCursorWords(editor, &editor->pCursors[0], +1);
+ else
+ {
+ ME_DisplayItem *pItem;
+ ME_DIType searchType = ((editor->nSelectionType == stLine) ?
+ diStartRowOrParagraphOrEnd:diParagraphOrEnd);
+ pItem = ME_FindItemFwd(editor->pCursors[0].pRun, searchType);
+ if (pItem->type == diTextEnd)
+ editor->pCursors[0].pRun = ME_FindItemBack(pItem, diRun);
+ else
+ editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
+ editor->pCursors[0].pPara = ME_GetParagraph(editor->pCursors[0].pRun);
+ editor->pCursors[0].nOffset = 0;
+ }
+ }
+}
+
+void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
+{
+ ME_Cursor tmp_cursor;
+ BOOL is_selection = FALSE, is_shift;
+
+ editor->nUDArrowX = -1;
+
+ x += editor->horz_si.nPos;
+ y += editor->vert_si.nPos;
+
+ tmp_cursor = editor->pCursors[0];
+ is_selection = ME_IsSelection(editor);
+ is_shift = GetKeyState(VK_SHIFT) < 0;
+
+ ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd, FALSE);
+
+ if (x >= editor->rcFormat.left || is_shift)
+ {
+ if (clickNum > 1)
+ {
+ editor->pCursors[1] = editor->pCursors[0];
+ if (is_shift) {
+ if (x >= editor->rcFormat.left)
+ ME_SelectByType(editor, stWord);
+ else
+ ME_SelectByType(editor, stParagraph);
+ } else if (clickNum % 2 == 0) {
+ ME_SelectByType(editor, stWord);
+ } else {
+ ME_SelectByType(editor, stParagraph);
+ }
+ }
+ else if (!is_shift)
+ {
+ editor->nSelectionType = stPosition;
+ editor->pCursors[1] = editor->pCursors[0];
+ }
+ else if (!is_selection)
+ {
+ editor->nSelectionType = stPosition;
+ editor->pCursors[1] = tmp_cursor;
+ }
+ else if (editor->nSelectionType != stPosition)
+ {
+ ME_ExtendAnchorSelection(editor);
+ }
+ }
+ else
+ {
+ if (clickNum < 2) {
+ ME_SelectByType(editor, stLine);
+ } else if (clickNum % 2 == 0 || is_shift) {
+ ME_SelectByType(editor, stParagraph);
+ } else {
+ ME_SelectByType(editor, stDocument);
+ }
+ }
+ ME_InvalidateSelection(editor);
+ ITextHost_TxShowCaret(editor->texthost, FALSE);
+ ME_ShowCaret(editor);
+ ME_SendSelChange(editor);
+}
+
+void ME_MouseMove(ME_TextEditor *editor, int x, int y)
+{
+ ME_Cursor tmp_cursor;
+
+ if (editor->nSelectionType == stDocument)
+ return;
+ x += editor->horz_si.nPos;
+ y += editor->vert_si.nPos;
+
+ tmp_cursor = editor->pCursors[0];
+ /* FIXME: do something with the return value of ME_FindPixelPos */
+ ME_FindPixelPos(editor, x, y, &tmp_cursor, &editor->bCaretAtEnd, TRUE);
+
+ ME_InvalidateSelection(editor);
+ editor->pCursors[0] = tmp_cursor;
+ ME_ExtendAnchorSelection(editor);
+
+ if (editor->nSelectionType != stPosition &&
+ memcmp(&editor->pCursors[1], &editor->pCursors[3], sizeof(ME_Cursor)))
+ {
+ /* The scroll the cursor towards the other end, since it was the one
+ * extended by ME_ExtendAnchorSelection */
+ ME_EnsureVisible(editor, &editor->pCursors[1]);
+ } else {
+ ME_EnsureVisible(editor, &editor->pCursors[0]);
+ }
+
+ ME_InvalidateSelection(editor);
+ ITextHost_TxShowCaret(editor->texthost, FALSE);
+ ME_ShowCaret(editor);
+ ME_SendSelChange(editor);
+}
+
+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, TRUE);
+ }
+ editor->nUDArrowX = x;
+ }
+ return x;
+}
+
+
+static void
+ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs, BOOL extend)
+{
+ ME_DisplayItem *pRun = pCursor->pRun;
+ ME_DisplayItem *pOldPara = pCursor->pPara;
+ ME_DisplayItem *pItem, *pNewPara;
+ int x = ME_GetXForArrow(editor, pCursor);
+
+ if (editor->bCaretAtEnd && !pCursor->nOffset)
+ if (!ME_PrevRun(&pOldPara, &pRun, TRUE))
+ 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);
+ if (!pItem) /* row not found */
+ {
+ if (extend)
+ ME_SetCursorToStart(editor, pCursor);
+ return;
+ }
+ pNewPara = ME_GetParagraph(pItem);
+ if (pOldPara->member.para.nFlags & MEPF_ROWEND ||
+ (pOldPara->member.para.pCell &&
+ pOldPara->member.para.pCell != pNewPara->member.para.pCell))
+ {
+ /* Brought out of a cell */
+ pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para;
+ if (pNewPara->type == diTextStart)
+ return; /* At the top, so don't go anywhere. */
+ pItem = ME_FindItemFwd(pNewPara, diStartRow);
+ }
+ if (pNewPara->member.para.nFlags & MEPF_ROWEND)
+ {
+ /* Brought into a table row */
+ ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell;
+ while (x < cell->pt.x && cell->prev_cell)
+ cell = &cell->prev_cell->member.cell;
+ if (cell->next_cell) /* else - we are still at the end of the row */
+ pItem = ME_FindItemBack(cell->next_cell, diStartRow);
+ }
+ }
+ else
+ {
+ /* start of the next row */
+ pItem = ME_FindItemFwd(pRun, diStartRow);
+ if (!pItem) /* row not found */
+ {
+ if (extend)
+ ME_SetCursorToEnd(editor, pCursor, TRUE);
+ return;
+ }
+ pNewPara = ME_GetParagraph(pItem);
+ if (pOldPara->member.para.nFlags & MEPF_ROWSTART ||
+ (pOldPara->member.para.pCell &&
+ pOldPara->member.para.pCell != pNewPara->member.para.pCell))
+ {
+ /* Brought out of a cell */
+ pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para;
+ if (pNewPara->type == diTextEnd)
+ return; /* At the bottom, so don't go anywhere. */
+ pItem = ME_FindItemFwd(pNewPara, diStartRow);
+ }
+ if (pNewPara->member.para.nFlags & MEPF_ROWSTART)
+ {
+ /* Brought into a table row */
+ ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell);
+ while (cell->member.cell.next_cell &&
+ x >= cell->member.cell.next_cell->member.cell.pt.x)
+ cell = cell->member.cell.next_cell;
+ pItem = ME_FindItemFwd(cell, diStartRow);
+ }
+ }
+ if (!pItem)
+ {
+ /* row not found - ignore */
+ return;
+ }
+ ME_FindRunInRow(editor, pItem, x, pCursor, &editor->bCaretAtEnd);
+ assert(pCursor->pRun);
+ assert(pCursor->pRun->type == diRun);
+}
+
+static void ME_ArrowPageUp(ME_TextEditor *editor, ME_Cursor *pCursor)
+{
+ ME_DisplayItem *p = ME_FindItemFwd(editor->pBuffer->pFirst, diStartRow);
+
+ if (editor->vert_si.nPos < p->member.row.nHeight)
+ {
+ ME_SetCursorToStart(editor, pCursor);
+ editor->bCaretAtEnd = FALSE;
+ /* Native clears seems to clear this x value on page up at the top
+ * of the text, but not on page down at the end of the text.
+ * Doesn't make sense, but we try to be bug for bug compatible. */
+ editor->nUDArrowX = -1;
+ } else {
+ ME_DisplayItem *pRun = pCursor->pRun;
+ ME_DisplayItem *pLast;
+ int x, y, yd, yp;
+ int yOldScrollPos = editor->vert_si.nPos;
+
+ 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.pt.y;
+ y = yp + p->member.row.pt.y;
+
+ ME_ScrollUp(editor, editor->sizeWindow.cy);
+ /* Only move the cursor by the amount scrolled. */
+ yd = y + editor->vert_si.nPos - yOldScrollPos;
+ 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.pt.y;
+ continue;
+ }
+ y = yp + p->member.row.pt.y;
+ if (y < yd)
+ break;
+ pLast = p;
+ } while(1);
+
+ ME_FindRunInRow(editor, pLast, x, pCursor, &editor->bCaretAtEnd);
+ }
+ assert(pCursor->pRun);
+ assert(pCursor->pRun->type == diRun);
+}
+
+static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
+{
+ ME_DisplayItem *pLast;
+ int x, y;
+
+ /* Find y position of the last row */
+ pLast = editor->pBuffer->pLast;
+ y = pLast->member.para.prev_para->member.para.pt.y
+ + ME_FindItemBack(pLast, diStartRow)->member.row.pt.y;
+
+ x = ME_GetXForArrow(editor, pCursor);
+
+ if (editor->vert_si.nPos >= y - editor->sizeWindow.cy)
+ {
+ ME_SetCursorToEnd(editor, pCursor, FALSE);
+ editor->bCaretAtEnd = FALSE;
+ } else {
+ ME_DisplayItem *pRun = pCursor->pRun;
+ ME_DisplayItem *p;
+ int yd, yp;
+ int yOldScrollPos = editor->vert_si.nPos;
+
+ 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.pt.y;
+ y = yp + p->member.row.pt.y;
+
+ /* For native richedit controls:
+ * v1.0 - v3.1 can only scroll down as far as the scrollbar lets us
+ * v4.1 can scroll past this position here. */
+ ME_ScrollDown(editor, editor->sizeWindow.cy);
+ /* Only move the cursor by the amount scrolled. */
+ yd = y + editor->vert_si.nPos - yOldScrollPos;
+ pLast = p;
+
+ do {
+ p = ME_FindItemFwd(p, diStartRowOrParagraph);
+ if (!p)
+ break;
+ if (p->type == diParagraph) {
+ yp = p->member.para.pt.y;
+ continue;
+ }
+ y = yp + p->member.row.pt.y;
+ if (y >= yd)
+ break;
+ pLast = p;
+ } while(1);
+
+ ME_FindRunInRow(editor, pLast, x, pCursor, &editor->bCaretAtEnd);
+ }
+ 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;
+ assert(pCursor->pPara == ME_GetParagraph(pRun));
+ pCursor->nOffset = 0;
+ }
+ }
+ editor->bCaretAtEnd = FALSE;
+}
+
+static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
+{
+ ME_SetCursorToStart(editor, pCursor);
+ editor->bCaretAtEnd = FALSE;
+}
+
+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) {
+ ME_DisplayItem *pRun = ME_FindItemFwd(pRow, diRun);
+ assert(pRun);
+ pCursor->pRun = pRun;
+ assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
+ pCursor->nOffset = 0;
+ editor->bCaretAtEnd = TRUE;
+ return;
+ }
+ pCursor->pRun = ME_FindItemBack(pRow, diRun);
+ assert(pCursor->pRun && pCursor->pRun->member.run.nFlags & MERF_ENDPARA);
+ assert(pCursor->pPara == ME_GetParagraph(pCursor->pRun));
+ pCursor->nOffset = 0;
+ editor->bCaretAtEnd = FALSE;
+}
+
+static void ME_ArrowCtrlEnd(ME_TextEditor *editor, ME_Cursor *pCursor)
+{
+ ME_SetCursorToEnd(editor, pCursor, FALSE);
+ editor->bCaretAtEnd = FALSE;
+}
+
+BOOL ME_IsSelection(ME_TextEditor *editor)
+{
+ return editor->pCursors[0].pRun != editor->pCursors[1].pRun ||
+ editor->pCursors[0].nOffset != editor->pCursors[1].nOffset;
+}
+
+void ME_DeleteSelection(ME_TextEditor *editor)
+{
+ int from, to;
+ int nStartCursor = ME_GetSelectionOfs(editor, &from, &to);
+ int nEndCursor = nStartCursor ^ 1;
+ ME_DeleteTextAtCursor(editor, nStartCursor, to - from);
+ editor->pCursors[nEndCursor] = editor->pCursors[nStartCursor];
+}
+
+ME_Style *ME_GetSelectionInsertStyle(ME_TextEditor *editor)
+{
+ return ME_GetInsertStyle(editor, 0);
+}
+
+void ME_SendSelChange(ME_TextEditor *editor)
+{
+ SELCHANGE sc;
+
+ sc.nmhdr.hwndFrom = NULL;
+ sc.nmhdr.idFrom = 0;
+ sc.nmhdr.code = EN_SELCHANGE;
+ ME_GetSelectionOfs(editor, &sc.chrg.cpMin, &sc.chrg.cpMax);
+ sc.seltyp = SEL_EMPTY;
+ if (sc.chrg.cpMin != sc.chrg.cpMax)
+ sc.seltyp |= SEL_TEXT;
+ if (sc.chrg.cpMin < sc.chrg.cpMax+1) /* what were RICHEDIT authors thinking ? */
+ sc.seltyp |= SEL_MULTICHAR;
+
+ if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
+ {
+ ME_ClearTempStyle(editor);
+
+ editor->notified_cr = sc.chrg;
+
+ if (editor->nEventMask & ENM_SELCHANGE)
+ {
+ TRACE("cpMin=%d cpMax=%d seltyp=%d (%s %s)\n",
+ sc.chrg.cpMin, sc.chrg.cpMax, sc.seltyp,
+ (sc.seltyp & SEL_TEXT) ? "SEL_TEXT" : "",
+ (sc.seltyp & SEL_MULTICHAR) ? "SEL_MULTICHAR" : "");
+ ITextHost_TxNotify(editor->texthost, sc.nmhdr.code, &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);
+ switch(nVKey) {
+ case VK_LEFT:
+ editor->bCaretAtEnd = FALSE;
+ if (ctrl)
+ success = ME_MoveCursorWords(editor, &tmp_curs, -1);
+ else
+ success = ME_MoveCursorChars(editor, &tmp_curs, -1, extend);
+ break;
+ case VK_RIGHT:
+ editor->bCaretAtEnd = FALSE;
+ if (ctrl)
+ success = ME_MoveCursorWords(editor, &tmp_curs, +1);
+ else
+ success = ME_MoveCursorChars(editor, &tmp_curs, +1, extend);
+ break;
+ case VK_UP:
+ ME_MoveCursorLines(editor, &tmp_curs, -1, extend);
+ break;
+ case VK_DOWN:
+ ME_MoveCursorLines(editor, &tmp_curs, +1, extend);
+ 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 = FALSE;
+ 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);
+ ITextHost_TxShowCaret(editor->texthost, FALSE);
+ ME_EnsureVisible(editor, &tmp_curs);
+ ME_ShowCaret(editor);
+ ME_SendSelChange(editor);
+ return success;
+}
projects / reactos.git / blobdiff