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]);
break;
default: assert(0);
}
/* Store the anchor positions for extending the selection. */
editor->pCursors[2] = editor->pCursors[0];
editor->pCursors[3] = editor->pCursors[1];
}
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);
pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
&editor->bCaretAtEnd);
pCursor->pPara = ME_GetParagraph(pCursor->pRun);
}
assert(pCursor->pRun);
assert(pCursor->pRun->type == diRun);
}
DECLSPEC_HIDDEN HRESULT WINAPI fnTextSrv_TxSetText(ITextServices *iface, LPCWSTR pszText)
{
ITextServicesImpl *This = impl_from_ITextServices(iface);
ME_Cursor cursor;
ME_SetCursorToStart(This->editor, &cursor);
ME_InternalDeleteText(This->editor, &cursor,
ME_GetTextLength(This->editor), FALSE);
ME_InsertTextFromCursor(This->editor, 0, pszText, -1,
This->editor->pBuffer->pDefaultStyle);
ME_SetSelection(This->editor, 0, 0);
This->editor->nModifyStep = 0;
OleFlushClipboard();
ME_EmptyUndoStack(This->editor);
ME_UpdateRepaint(This->editor, FALSE);
return S_OK;
}
/* Move the cursor nRelOfs characters (either forwards or backwards)
*
* returns the actual number of characters moved.
**/
int ME_MoveCursorChars(ME_TextEditor *editor, ME_Cursor *cursor, int nRelOfs)
{
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))
{
/* new offset at the end of the text */
ME_SetCursorToEnd(editor, cursor);
nRelOfs -= new_offset - ME_GetTextLength(editor);
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;
}
static void ME_ArrowCtrlHome(ME_TextEditor *editor, ME_Cursor *pCursor)
{
ME_SetCursorToStart(editor, pCursor);
editor->bCaretAtEnd = FALSE;
}
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]);
editor->pCursors[0].nOffset = editor->pCursors[0].pRun->member.run.len;
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]);
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);
/* 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;
}
