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].nOffset = 0;
pItem = ME_FindItemBack(pItem, backSearchType);
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];
}
void
ME_SelectWord(ME_TextEditor *editor)
{
if (!(editor->pCursors[0].pRun->member.run.nFlags & MERF_ENDPARA))
ME_MoveCursorWords(editor, &editor->pCursors[0], -1);
ME_MoveCursorWords(editor, &editor->pCursors[1], +1);
ME_InvalidateSelection(editor);
ME_SendSelChange(editor);
}
/* 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;
}
}
}
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);
ME_ShowCaret(editor);
ME_SendSelChange(editor);
return success;
}
