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wine/dlls/riched20/caret.c
Dylan Smith 762e5818d1 richedit: Hide cursor when text is selected. 
The cursor should only be shown when there is no selection, since this
is how it is done in Windows.  This patch avoids showing the cursor when
there is a selection, and destroys the cursor when a selection is made.
2008-07-08 10:44:45 +02:00

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/*
* 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)
&& !editor->bEmulateVersion10) /* Ignore GTL_USECRLF flag in 1.0 emulation */
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(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)
{
ME_DisplayItem *prev = ME_FindItemBack(pCursorRun, diRunOrParagraph);
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, &para->member.para,
&run->member.run, ME_StrLen(run->member.run.strText),
row->member.row.nLMargin);
}
}
if (pCursor->nOffset) {
sz = ME_GetRunSize(&c, &para->member.para, &run->member.run, pCursor->nOffset,
row->member.row.nLMargin);
}
*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 + run->member.run.pt.y - pSizeRun->member.run.nAscent - ME_GetYScrollPos(editor);
ME_DestroyContext(&c, editor->hWnd);
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 && !ME_IsSelection(editor))
{
RECT rect;
GetClientRect(editor->hWnd, &rect);
x = min(x, rect.right-2);
CreateCaret(editor->hWnd, NULL, 0, height);
SetCaretPos(x, y);
} else {
DestroyCaret();
}
}
void ME_ShowCaret(ME_TextEditor *ed)
{
ME_MoveCaret(ed);
if(ed->bHaveFocus && !ME_IsSelection(ed))
ShowCaret(ed->hWnd);
}
void ME_HideCaret(ME_TextEditor *ed)
{
if(!ed->bHaveFocus || ME_IsSelection(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) {
int eollen = run->nCR + run->nLF;
if (!ME_FindItemFwd(c.pRun, diParagraph))
{
return;
}
ME_JoinParagraphs(editor, ME_GetParagraph(c.pRun));
/* ME_SkipAndPropagateCharOffset(p->pRun, shift); */
ME_CheckCharOffsets(editor);
nChars -= (eollen < nChars) ? eollen : 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);
}
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_SendSelChange(editor);
}
void ME_InsertEndRowFromCursor(ME_TextEditor *editor, 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_ENDROW);
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;
int numCR, numLF;
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 */
/* Encode and fill number of CR and LF according to emulation mode */
if (editor->bEmulateVersion10) {
const WCHAR * tpos;
/* We have to find out how many consecutive \r are there, and if there
is a \n terminating the run of \r's. */
numCR = 0; numLF = 0;
tpos = pos;
while (tpos-str < len && *tpos == '\r') {
tpos++;
numCR++;
}
if (tpos-str >= len) {
/* Reached end of text without finding anything but '\r' */
if (tpos != pos) {
pos++;
}
numCR = 1; numLF = 0;
} else if (*tpos == '\n') {
/* The entire run of \r's plus the one \n is one single line break */
pos = tpos + 1;
numLF = 1;
} else {
/* Found some other content past the run of \r's */
pos++;
numCR = 1; numLF = 0;
}
} else {
if(pos-str < len && *pos =='\r')
pos++;
if(pos-str < len && *pos =='\n')
pos++;
numCR = 1; numLF = 0;
}
tp = ME_SplitParagraph(editor, p->pRun, p->pRun->member.run.style, numCR, numLF);
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) {
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_SelectByType(ME_TextEditor *editor, ME_SelectionType selectionType)
{
/* pCursor[0] will be the start of the selection
* pCursor[1] is the other end of the selection range
* 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[1], +1);
editor->pCursors[0] = editor->pCursors[1];
ME_MoveCursorWords(editor, &editor->pCursors[0], -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_FindItemBack(editor->pCursors[0].pRun, backSearchType);
editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
editor->pCursors[0].nOffset = 0;
pItem = ME_FindItemFwd(editor->pCursors[0].pRun, fwdSearchType);
assert(pItem);
if (pItem->type == diTextEnd)
editor->pCursors[1].pRun = ME_FindItemBack(pItem, diRun);
else
editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
editor->pCursors[1].nOffset = 0;
break;
}
case stDocument:
/* Select everything with cursor anchored from the start of the text */
editor->nSelectionType = stDocument;
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;
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(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;
}
static void 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;
ME_DisplayItem *last = NULL;
int rx = 0;
if (is_eol)
*is_eol = 0;
/* find paragraph */
for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
{
assert(p->type == diParagraph);
if (y < p->member.para.nYPos + p->member.para.nHeight)
{
y -= p->member.para.nYPos;
p = ME_FindItemFwd(p, diStartRow);
break;
}
}
/* find row */
for (; p != editor->pBuffer->pLast; )
{
ME_DisplayItem *pp;
assert(p->type == diStartRow);
if (y < p->member.row.nYPos + p->member.row.nHeight)
{
p = ME_FindItemFwd(p, diRun);
break;
}
pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
if (pp->type != diStartRow)
{
p = ME_FindItemFwd(p, diRun);
break;
}
p = pp;
}
if (p == editor->pBuffer->pLast)
{
/* 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. */
p = ME_FindItemBack(p, diStartRow);
if (p != NULL){
p = ME_FindItemFwd(p, diRun);
}
else
{
p = editor->pBuffer->pLast;
}
}
for (; p != editor->pBuffer->pLast; p = p->next)
{
switch (p->type)
{
case diRun:
rx = x - p->member.run.pt.x;
if (rx < p->member.run.nWidth)
{
found_here:
assert(p->type == diRun);
if ((p->member.run.nFlags & MERF_ENDPARA) || rx < 0)
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;
}
break;
case diStartRow:
p = ME_FindItemFwd(p, diRun);
if (is_eol) *is_eol = 1;
rx = 0; /* FIXME not sure */
goto found_here;
case diParagraph:
case diTextEnd:
rx = 0; /* FIXME not sure */
p = last;
goto found_here;
default: assert(0);
}
last = p;
}
result->pRun = ME_FindItemBack(p, diRun);
result->nOffset = 0;
assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
}
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);
}
/* 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, 0);
anchorStartOfs = ME_GetCursorOfs(editor, 2);
anchorEndOfs = ME_GetCursorOfs(editor, 3);
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[0] = tmp_cursor;
if (editor->nSelectionType == stWord)
ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
else
{
ME_DisplayItem *pItem;
ME_DIType searchType = ((editor->nSelectionType == stLine) ?
diStartRowOrParagraph:diParagraph);
pItem = ME_FindItemBack(editor->pCursors[0].pRun, searchType);
editor->pCursors[0].pRun = ME_FindItemFwd(pItem, diRun);
editor->pCursors[0].nOffset = 0;
}
}
else if (curOfs >= anchorEndOfs)
{
/* Extend the right 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) ?
diStartRowOrParagraphOrEnd:diParagraphOrEnd);
pItem = ME_FindItemFwd(editor->pCursors[1].pRun, searchType);
if (pItem->type == diTextEnd)
editor->pCursors[1].pRun = ME_FindItemBack(pItem, diRun);
else
editor->pCursors[1].pRun = ME_FindItemFwd(pItem, diRun);
editor->pCursors[1].nOffset = 0;
}
}
}
void ME_LButtonDown(ME_TextEditor *editor, int x, int y, int clickNum)
{
ME_Cursor tmp_cursor;
int is_selection = 0;
BOOL is_shift;
editor->nUDArrowX = -1;
y += ME_GetYScrollPos(editor);
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);
if (x >= editor->selofs || is_shift)
{
if (clickNum > 1)
{
editor->pCursors[1] = editor->pCursors[0];
if (is_shift) {
if (x >= editor->selofs)
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);
HideCaret(editor->hWnd);
ME_ShowCaret(editor);
ME_ClearTempStyle(editor);
ME_SendSelChange(editor);
}
void ME_MouseMove(ME_TextEditor *editor, int x, int y)
{
ME_Cursor tmp_cursor;
if (editor->nSelectionType == stDocument)
return;
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);
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_Cursor tmpCursor = editor->pCursors[0];
editor->pCursors[0] = editor->pCursors[1];
editor->pCursors[1] = tmpCursor;
SendMessageW(editor->hWnd, EM_SCROLLCARET, 0, 0);
editor->pCursors[1] = editor->pCursors[0];
editor->pCursors[0] = tmpCursor;
} else {
SendMessageW(editor->hWnd, EM_SCROLLCARET, 0, 0);
}
ME_InvalidateSelection(editor);
HideCaret(editor->hWnd);
ME_ShowCaret(editor);
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;
if (pbCaretAtEnd) *pbCaretAtEnd = FALSE;
if (pOffset) *pOffset = 0;
do {
int run_x = pNext->member.run.pt.x;
int width = pNext->member.run.nWidth;
if (x < run_x)
{
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 = TRUE;
return pNext;
} else {
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);
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)
{
return ME_GetInsertStyle(editor, 0);
}
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;
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" : "");
if (sc.chrg.cpMin != editor->notified_cr.cpMin || sc.chrg.cpMax != editor->notified_cr.cpMax)
{
ME_ClearTempStyle(editor);
editor->notified_cr = sc.chrg;
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);
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;
}
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