--- vendor/wine/dlls/riched20/current/caret.c 2005-03-15 08:10:52 UTC (rev 14088)
+++ vendor/wine/dlls/riched20/current/caret.c 2005-03-15 08:22:05 UTC (rev 14089)
@@ -0,0 +1,977 @@
+/*
+ * RichEdit - Caret and selection functions.
+ *
+ * Copyright 2004 by Krzysztof Foltman
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include "editor.h"
+
+WINE_DEFAULT_DEBUG_CHANNEL(richedit);
+
+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);
+}
+
+void ME_SetSelection(ME_TextEditor *editor, int from, int to)
+{
+ 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_Repaint(editor);
+ ME_ClearTempStyle(editor);
+ return;
+ }
+ if (from == -1)
+ {
+ editor->pCursors[1] = editor->pCursors[0];
+ ME_Repaint(editor);
+ ME_ClearTempStyle(editor);
+ return;
+ }
+ if (from>to)
+ {
+ int tmp = from;
+ from = to;
+ to = tmp;
+ }
+ ME_RunOfsFromCharOfs(editor, from, &editor->pCursors[1].pRun, &editor->pCursors[1].nOffset);
+ ME_RunOfsFromCharOfs(editor, to, &editor->pCursors[0].pRun, &editor->pCursors[0].nOffset);
+}
+
+void ME_MoveCaret(ME_TextEditor *editor)
+{
+ HDC hDC = GetDC(editor->hWnd);
+ ME_Context c;
+
+ ME_Cursor *pCursor = &editor->pCursors[0];
+ ME_DisplayItem *pCursorRun = pCursor->pRun;
+ ME_DisplayItem *pSizeRun = pCursor->pRun;
+
+ ME_InitContext(&c, editor, hDC);
+ assert(!pCursor->nOffset || !editor->bCaretAtEnd);
+
+ if (pCursorRun->type == diRun) {
+ ME_DisplayItem *row = ME_FindItemBack(pCursorRun, diStartRowOrParagraph);
+ if (row) {
+ ME_DisplayItem *run = pCursorRun;
+ ME_DisplayItem *para;
+ SIZE sz = {0, 0};
+ if (!pCursor->nOffset && !editor->bCaretAtEnd)
+ {
+ ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrStartRow);
+ if (prev->type == diRun)
+ pSizeRun = prev;
+ }
+ assert(row->type == diStartRow); /* paragraph -> run without start row ?*/
+ para = ME_FindItemBack(row, diParagraph);
+ if (editor->bCaretAtEnd && !pCursor->nOffset &&
+ run == ME_FindItemFwd(row, diRun))
+ {
+ ME_DisplayItem *tmp = ME_FindItemBack(row, diRunOrParagraph);
+ if (tmp->type == diRun)
+ {
+ row = ME_FindItemBack(tmp, diStartRow);
+ pSizeRun = run = tmp;
+ sz = ME_GetRunSize(&c, &run->member.run, ME_StrLen(run->member.run.strText));
+ }
+ }
+ if (pCursor->nOffset && !(run->member.run.nFlags & MERF_SKIPPED)) {
+ sz = ME_GetRunSize(&c, &run->member.run, pCursor->nOffset);
+ }
+ CreateCaret(editor->hWnd, NULL, 0, pSizeRun->member.run.nAscent+pSizeRun->member.run.nDescent);
+ SetCaretPos(run->member.run.pt.x+sz.cx,
+ para->member.para.nYPos+row->member.row.nBaseline+pSizeRun->member.run.pt.y-pSizeRun->member.run.nAscent-GetScrollPos(editor->hWnd, SB_VERT));
+ } else {
+ assert(0 == "Wrapped paragraph run without a row?");
+ CreateCaret(editor->hWnd, NULL, 0, 10);
+ SetCaretPos(0,0);
+ }
+ }
+ else {
+ assert(0 == "Cursor not on a run");
+ CreateCaret(editor->hWnd, NULL, 0, 10); /* FIXME use global font */
+ SetCaretPos(0,0);
+ }
+ ME_DestroyContext(&c);
+ ReleaseDC(editor->hWnd, hDC);
+}
+
+void ME_ShowCaret(ME_TextEditor *ed)
+{
+ ME_MoveCaret(ed);
+ ShowCaret(ed->hWnd);
+}
+
+void ME_HideCaret(ME_TextEditor *ed)
+{
+ 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--;
+ 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);
+ ME_InternalDeleteText(editor, ME_GetCursorOfs(editor, nCursor), nChars);
+}
+
+static WCHAR wszSpace[] = {' ', 0};
+
+/* FIXME this is temporary, just to have something to test how bad graphics handler is */
+void ME_InsertGraphicsFromCursor(ME_TextEditor *editor, int nCursor)
+{
+ ME_Cursor *pCursor = &editor->pCursors[nCursor];
+ ME_DisplayItem *pItem = NULL;
+ ME_DisplayItem *pNewRun = NULL;
+ ME_Style *pStyle = ME_GetInsertStyle(editor, nCursor);
+ ME_UndoItem *pUndo;
+
+ /* FIXME no no no */
+ if (ME_IsSelection(editor))
+ ME_DeleteSelection(editor);
+
+ pUndo = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
+ if (pUndo) {
+ pUndo->nStart = pCursor->nOffset + pCursor->pRun->member.run.nCharOfs + ME_GetParagraph(pCursor->pRun)->member.para.nCharOfs;
+ pUndo->nLen = 1;
+ }
+ if (pCursor->nOffset)
+ {
+ ME_SplitRunSimple(editor, pCursor->pRun, pCursor->nOffset);
+ }
+ pItem = pCursor->pRun;
+ pNewRun = ME_MakeRun(pStyle, ME_MakeStringN(wszSpace, 1), MERF_GRAPHICS);
+ pNewRun->member.run.nCharOfs = pCursor->pRun->member.run.nCharOfs;
+ ME_InsertBefore(pCursor->pRun, pNewRun);
+ ME_PropagateCharOffset(pItem, 1);
+ ME_CheckCharOffsets(editor);
+ ME_SendSelChange(editor);
+}
+
+void ME_InsertTextFromCursor(ME_TextEditor *editor, int nCursor,
+ const WCHAR *str, int len, ME_Style *style)
+{
+ const WCHAR *pos;
+ ME_Cursor *p = NULL;
+
+ assert(style);
+ editor->bCaretAtEnd = FALSE;
+
+ /*
+ if (!style)
+ style = ME_GetInsertStyle(editor, nCursor);
+ else
+ ME_AddRefStyle(style);
+ */
+ ME_AddRefStyle(style);
+
+ /* FIXME really HERE ? */
+ if (ME_IsSelection(editor))
+ ME_DeleteSelection(editor);
+
+ assert(nCursor>=0 && nCursor<editor->nCursors);
+ if (len == -1)
+ len = lstrlenW(str);
+ 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++;
+ /* handle EOLs */
+ if (pos-str < len) {
+ ME_DisplayItem *tp, *end_run;
+ ME_Paragraph *para;
+ ME_Style *tmp_style;
+ if (pos!=str)
+ ME_InsertTextFromCursor(editor, nCursor, str, pos-str, style);
+ p = &editor->pCursors[nCursor];
+ tp = ME_FindItemBack(p->pRun, diParagraph);
+ para = &tp->member.para;
+ assert(tp);
+ 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) {
+ ME_InsertTextFromCursor(editor, nCursor, pos, len-(pos-str), style);
+ }
+ ME_ReleaseStyle(style);
+ return;
+ }
+ p = &editor->pCursors[nCursor];
+ if (style) {
+ ME_DisplayItem *pNewRun = NULL;
+
+ assert(p->pRun->type == diRun);
+ pNewRun = ME_MakeRun(style, ME_MakeStringN(str, len), 0); /* addrefs style */
+ ME_InsertRun(editor, ME_CharOfsFromRunOfs(editor, p->pRun, p->nOffset), pNewRun);
+ ME_DestroyDisplayItem(pNewRun);
+ ME_ReleaseStyle(style);
+ return;
+ } else {
+ assert(0);
+ }
+}
+
+BOOL ME_ArrowLeft(ME_TextEditor *editor, ME_Cursor *p)
+{
+ if (p->nOffset) {
+ p->nOffset = ME_StrRelPos2(p->pRun->member.run.strText, p->nOffset, -1);
+ return TRUE;
+ }
+ else
+ {
+ ME_DisplayItem *pRun = ME_FindItemBack(p->pRun, diRunOrParagraph);
+ assert(pRun);
+ if (pRun->type == diRun) {
+ p->pRun = pRun;
+ assert(p->pRun->type == diRun);
+ assert(pRun->member.run.strText->nLen);
+ p->nOffset = pRun->member.run.strText->nLen;
+ if (p->nOffset) {
+ p->nOffset = ME_StrRelPos2(pRun->member.run.strText, p->nOffset, -1);
+ return TRUE;
+ }
+ else
+ assert(0);
+ }
+ if (pRun->type == diParagraph)
+ {
+ if (pRun->member.para.prev_para->type == diTextStart)
+ return FALSE;
+ assert(pRun->member.para.prev_para->type == diParagraph);
+ 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);
+ p->pRun = pRun;
+ p->nOffset = 0;
+ return TRUE;
+ }
+ assert(0);
+ }
+}
+
+BOOL ME_ArrowRight(ME_TextEditor *editor, ME_Cursor *p)
+{
+ int new_ofs = ME_StrRelPos2(p->pRun->member.run.strText, p->nOffset, 1);
+ if (new_ofs<p->pRun->member.run.strText->nLen) {
+ p->nOffset = new_ofs;
+ }
+ else
+ {
+ ME_DisplayItem *pRun = ME_FindItemFwd(p->pRun, diRun);
+ if (pRun) {
+ p->pRun = pRun;
+ assert(p->pRun->type == diRun);
+ p->nOffset = 0;
+ }
+ }
+ return TRUE;
+}
+
+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;
+}
+
+void ME_LButtonDown(ME_TextEditor *editor, int x, int y)
+{
+ ME_Cursor tmp_cursor;
+ int is_selection = 0;
+
+ editor->nUDArrowX = -1;
+
+ y += GetScrollPos(editor->hWnd, SB_VERT);
+
+ 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;
+ }
+ }
+ HideCaret(editor->hWnd);
+ ME_MoveCaret(editor);
+ if (is_selection)
+ ME_Repaint(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 += GetScrollPos(editor->hWnd, SB_VERT);
+
+ tmp_cursor = editor->pCursors[0];
+ if (!ME_FindPixelPos(editor, x, y, &editor->pCursors[0], &editor->bCaretAtEnd))
+ /* return */;
+
+ if (tmp_cursor.pRun == editor->pCursors[0].pRun &&
+ tmp_cursor.nOffset == editor->pCursors[0].nOffset)
+ return;
+
+ HideCaret(editor->hWnd);
+ ME_MoveCaret(editor);
+ ME_Repaint(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;
+}
+
+void ME_ArrowUp(ME_TextEditor *editor, ME_Cursor *pCursor)
+{
+ ME_DisplayItem *pRun = pCursor->pRun;
+ ME_DisplayItem *pItem, *pItem2;
+ int x = ME_GetXForArrow(editor, pCursor);
+
+ if (editor->bCaretAtEnd && !pCursor->nOffset)
+ {
+ pRun = ME_FindItemBack(pRun, diRun);
+ if (!pRun)
+ return;
+ }
+
+ /* start of this row */
+ pItem = ME_FindItemBack(pRun, diStartRow);
+ assert(pItem);
+ /* start of the previous row */
+ pItem2 = ME_FindItemBack(pItem, diStartRow);
+ /* no previous row = the first line of the first paragraph */
+ if (!pItem2) /* can't go up - don't go BOL (as in MS richedit) */
+ return;
+ /* FIXME
+ ME_WrapTextParagraph(editor, ME_FindItemBack(pItem2, diParagraph));
+ */
+ pCursor->pRun = ME_FindRunInRow(editor, pItem2, x, &pCursor->nOffset, &editor->bCaretAtEnd);
+}
+
+void ME_ArrowDown(ME_TextEditor *editor, ME_Cursor *pCursor)
+{
+ ME_DisplayItem *pRun = pCursor->pRun;
+ ME_DisplayItem *pItem;
+ int x = ME_GetXForArrow(editor, pCursor);
+ if (!pCursor->nOffset && editor->bCaretAtEnd)
+ {
+ pRun = ME_FindItemBack(pRun, diRun);
+/* x = pRun->member.run.pt.x + pRun->member.run.nWidth; */
+ }
+ /* start of the next row */
+ pItem = ME_FindItemFwd(pRun, diStartRow);
+ /* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
+ */
+ if (!pItem)
+ {
+ /* next row not found - ignore */
+ return;
+ }
+ pCursor->pRun = ME_FindRunInRow(editor, pItem, x, &pCursor->nOffset, &editor->bCaretAtEnd);
+ assert(pCursor->pRun);
+ assert(pCursor->pRun->type == diRun);
+}
+
+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;
+}
+
+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;
+ }
+ }
+}
+
+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;
+}
+
+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;
+}
+
+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_CancelSelection(ME_TextEditor *editor, int dir)
+{
+ int cdir;
+
+ if (GetKeyState(VK_SHIFT)<0)
+ return FALSE;
+ if (!memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor)))
+ return FALSE;
+
+ cdir = ME_GetCursorOfs(editor, 0) - ME_GetCursorOfs(editor, 1);
+
+ if (cdir*dir>0)
+ editor->pCursors[1] = editor->pCursors[0];
+ else
+ editor->pCursors[0] = editor->pCursors[1];
+ /* FIXME optimize */
+ ME_MarkAllForWrapping(editor);
+ ME_Repaint(editor);
+ return TRUE;
+}
+
+void ME_RepaintSelection(ME_TextEditor *editor, ME_Cursor *pTempCursor)
+{
+ ME_Cursor old_anchor = editor->pCursors[1];
+ BOOL bRedraw = FALSE;
+ bRedraw = memcmp(&editor->pCursors[0], &editor->pCursors[1], sizeof(ME_Cursor));
+
+ if (bRedraw)
+ {
+ /* FIXME optimize */
+ ME_MarkAllForWrapping(editor);
+ }
+
+ 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))) {
+ ME_Repaint(editor);
+ return;
+ }
+ return;
+ }
+ else
+ {
+ if (!memcmp(pTempCursor, &editor->pCursors[1], sizeof(ME_Cursor))) /* starting selection */
+ {
+ editor->pCursors[1] = *pTempCursor;
+ }
+ }
+
+ ME_Repaint(editor);
+}
+
+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;
+ 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, int nCtrl)
+{
+ int nCursor = 0;
+ ME_Cursor *p = &editor->pCursors[nCursor];
+ ME_Cursor tmp_curs = *p;
+
+ switch(nVKey) {
+ case VK_UP:
+ ME_ArrowUp(editor, p);
+ ME_ClearTempStyle(editor);
+ ME_RepaintSelection(editor, &tmp_curs);
+ ME_SendSelChange(editor);
+ return TRUE;
+ case VK_DOWN:
+ ME_ArrowDown(editor, p);
+ ME_ClearTempStyle(editor);
+ ME_RepaintSelection(editor, &tmp_curs);
+ ME_SendSelChange(editor);
+ return TRUE;
+ }
+
+ editor->nUDArrowX = -1;
+ switch(nVKey) {
+ case VK_BACK: { /* FIXME backspace and delete aren't the same, they act different wrt paragraph style of the merged paragraph */
+ if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY)
+ return FALSE;
+ if (ME_IsSelection(editor))
+ {
+ editor->bCaretAtEnd = FALSE; /* FIXME or maybe not */
+ ME_DeleteSelection(editor);
+ ME_UpdateRepaint(editor);
+ return TRUE;
+ }
+ if (ME_ArrowLeft(editor, p)) {
+ editor->bCaretAtEnd = FALSE; /* FIXME or maybe not */
+ ME_MoveCaret(editor);
+ ME_DeleteTextAtCursor(editor, nCursor, 1);
+ ME_UpdateRepaint(editor);
+ }
+ return TRUE;
+ }
+ case VK_DELETE: {
+ if (GetWindowLongW(editor->hWnd, GWL_STYLE) & ES_READONLY)
+ return FALSE;
+ /* editor->bCaretAtEnd = 0; FIXME or maybe not */
+ if (ME_IsSelection(editor))
+ {
+ ME_DeleteSelection(editor);
+ ME_UpdateRepaint(editor);
+ return TRUE;
+ }
+ ME_DeleteTextAtCursor(editor, nCursor, 1);
+ ME_UpdateRepaint(editor);
+ return TRUE;
+ }
+ case VK_HOME: {
+ if (GetKeyState(VK_CONTROL)<0)
+ ME_ArrowCtrlHome(editor, p);
+ else
+ ME_ArrowHome(editor, p);
+ editor->bCaretAtEnd = 0;
+ ME_ClearTempStyle(editor);
+ ME_RepaintSelection(editor, &tmp_curs);
+ ME_SendSelChange(editor);
+ return TRUE;
+ }
+ case VK_END:
+ if (GetKeyState(VK_CONTROL)<0)
+ ME_ArrowCtrlEnd(editor, p);
+ else
+ ME_ArrowEnd(editor, p);
+ ME_ClearTempStyle(editor);
+ ME_RepaintSelection(editor, &tmp_curs);
+ ME_SendSelChange(editor);
+ return TRUE;
+ case VK_LEFT:
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