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_RewrapRepaint(ME_TextEditor *editor)
{
ME_MarkAllForWrapping(editor);
ME_WrapMarkedParagraphs(editor);
ME_UpdateScrollBar(editor);
ME_Repaint(editor);
}
void ME_TabPressedInTable(ME_TextEditor *editor, BOOL bSelectedRow)
{
/* FIXME: Shift tab should move to the previous cell. */
ME_Cursor fromCursor, toCursor;
ME_InvalidateSelection(editor);
{
int from, to;
from = ME_GetCursorOfs(editor, 0);
to = ME_GetCursorOfs(editor, 1);
if (from <= to)
{
fromCursor = editor->pCursors[0];
toCursor = editor->pCursors[1];
} else {
fromCursor = editor->pCursors[1];
toCursor = editor->pCursors[0];
}
}
if (!editor->bEmulateVersion10) /* v4.1 */
{
if (!ME_IsInTable(toCursor.pRun))
{
editor->pCursors[0] = toCursor;
editor->pCursors[1] = toCursor;
} else {
ME_SelectOrInsertNextCell(editor, toCursor.pRun);
}
} else { /* v1.0 - 3.0 */
if (!ME_IsInTable(fromCursor.pRun)) {
editor->pCursors[0] = fromCursor;
editor->pCursors[1] = fromCursor;
/* FIXME: For some reason the caret is shown at the start of the
* previous paragraph in v1.0 to v3.0, and bCaretAtEnd only works
* within the paragraph for wrapped lines. */
if (ME_FindItemBack(fromCursor.pRun, diRun))
editor->bCaretAtEnd = TRUE;
} else if ((bSelectedRow || !ME_IsInTable(toCursor.pRun))) {
ME_SelectOrInsertNextCell(editor, fromCursor.pRun);
} else {
if (ME_IsSelection(editor) && !toCursor.nOffset)
{
ME_DisplayItem *run;
run = ME_FindItemBack(toCursor.pRun, diRunOrParagraphOrEnd);
if (run->type == diRun && run->member.run.nFlags & MERF_TAB)
ME_SelectOrInsertNextCell(editor, run);
else
ME_SelectOrInsertNextCell(editor, toCursor.pRun);
} else {
ME_SelectOrInsertNextCell(editor, toCursor.pRun);
}
}
}
ME_InvalidateSelection(editor);
ME_Repaint(editor);
HideCaret(editor->hWnd);
ME_ShowCaret(editor);
ME_SendSelChange(editor);
}
void ME_UpdateRepaint(ME_TextEditor *editor)
{
/*
InvalidateRect(editor->hWnd, NULL, TRUE);
*/
ME_SendOldNotify(editor, EN_CHANGE);
ME_Repaint(editor);
ME_SendOldNotify(editor, EN_UPDATE);
ME_SendSelChange(editor);
}
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);
}
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;
}
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;
}
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;
}
