void ME_UpdateScrollBar(ME_TextEditor *editor)
{
HWND hWnd = editor->hWnd;
SCROLLINFO si;
BOOL bUpdateScrollBars;
si.cbSize = sizeof(si);
si.fMask = SIF_PAGE | SIF_POS | SIF_RANGE;
GetScrollInfo(hWnd, SB_VERT, &si);
bUpdateScrollBars = (editor->bScrollY)&& ((si.nMax != editor->nTotalLength) || (si.nPage != editor->sizeWindow.cy));
if (editor->bScrollY != (si.nMax > 0))
{ /* The scroll bar needs to be shown or hidden */
si.fMask = SIF_RANGE | SIF_PAGE;
if (GetWindowLongW(hWnd, GWL_STYLE) & ES_DISABLENOSCROLL)
si.fMask |= SIF_DISABLENOSCROLL;
si.nMin = 0;
si.nPage = editor->sizeWindow.cy;
if (editor->bScrollY)
si.nMax = editor->nTotalLength;
else
si.nMax = 0;
SetScrollInfo(hWnd, SB_VERT, &si, FALSE);
ME_MarkAllForWrapping(editor);
ME_WrapMarkedParagraphs(editor);
bUpdateScrollBars = TRUE;
}
if (bUpdateScrollBars)
{
int nScroll = 0;
si.fMask = SIF_PAGE | SIF_RANGE | SIF_POS;
if (GetWindowLongW(hWnd, GWL_STYLE) & ES_DISABLENOSCROLL)
si.fMask |= SIF_DISABLENOSCROLL;
if (editor->bScrollY)
{
si.nMax = editor->nTotalLength;
si.nPage = editor->sizeWindow.cy;
if (si.nPos > si.nMax-si.nPage)
{
nScroll = (si.nMax-si.nPage)-si.nPos;
si.nPos = si.nMax-si.nPage;
}
}
else
{
si.nMax = 0;
si.nPage = 0;
si.nPos = 0;
}
TRACE("min=%d max=%d page=%d pos=%d shift=%d\n", si.nMin, si.nMax, si.nPage, si.nPos, nScroll);
editor->nScrollPosY = si.nPos;
SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
if (nScroll)
ScrollWindow(hWnd, 0, -nScroll, NULL, NULL);
}
}
void
ME_RewrapRepaint(ME_TextEditor *editor)
{
ME_MarkAllForWrapping(editor);
ME_WrapMarkedParagraphs(editor);
ME_UpdateScrollBar(editor);
ME_Repaint(editor);
}
void
ME_MoveCaret(ME_TextEditor *editor)
{
int x, y, height;
ME_WrapMarkedParagraphs(editor);
ME_GetCursorCoordinates(editor, &editor->pCursors[0], &x, &y, &height);
CreateCaret(editor->hWnd, NULL, 0, height);
SetCaretPos(x, y);
}
void ME_Repaint(ME_TextEditor *editor)
{
ME_Cursor *pCursor = &editor->pCursors[0];
if (ME_WrapMarkedParagraphs(editor)) {
ME_UpdateScrollBar(editor);
}
if (editor->bRedraw)
{
ME_EnsureVisible(editor, pCursor->pRun);
UpdateWindow(editor->hWnd);
}
}
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)
{
CreateCaret(editor->hWnd, NULL, 0, height);
SetCaretPos(x, y);
}
}
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))
{
x = min(x, editor->rcFormat.right-1);
CreateCaret(editor->hWnd, NULL, 0, height);
SetCaretPos(x, y);
}
}
void
ME_InvalidateSelection(ME_TextEditor *editor)
{
ME_DisplayItem *para1, *para2;
int nStart, nEnd;
int len = ME_GetTextLength(editor);
ME_GetSelection(editor, &nStart, &nEnd);
/* if both old and new selection are 0-char (= caret only), then
there's no (inverted) area to be repainted, neither old nor new */
if (nStart == nEnd && editor->nLastSelStart == editor->nLastSelEnd)
return;
ME_WrapMarkedParagraphs(editor);
ME_GetSelectionParas(editor, ¶1, ¶2);
assert(para1->type == diParagraph);
assert(para2->type == diParagraph);
/* last selection markers aren't always updated, which means
they can point past the end of the document */
if (editor->nLastSelStart > len)
editor->nLastSelEnd = len;
if (editor->nLastSelEnd > len)
editor->nLastSelEnd = len;
/* if the start part of selection is being expanded or contracted... */
if (nStart < editor->nLastSelStart) {
ME_MarkForPainting(editor, para1, ME_FindItemFwd(editor->pLastSelStartPara, diParagraphOrEnd));
} else
if (nStart > editor->nLastSelStart) {
ME_MarkForPainting(editor, editor->pLastSelStartPara, ME_FindItemFwd(para1, diParagraphOrEnd));
}
/* if the end part of selection is being contracted or expanded... */
if (nEnd < editor->nLastSelEnd) {
ME_MarkForPainting(editor, para2, ME_FindItemFwd(editor->pLastSelEndPara, diParagraphOrEnd));
} else
if (nEnd > editor->nLastSelEnd) {
ME_MarkForPainting(editor, editor->pLastSelEndPara, ME_FindItemFwd(para2, diParagraphOrEnd));
}
ME_InvalidateMarkedParagraphs(editor);
/* remember the last invalidated position */
ME_GetSelection(editor, &editor->nLastSelStart, &editor->nLastSelEnd);
ME_GetSelectionParas(editor, &editor->pLastSelStartPara, &editor->pLastSelEndPara);
assert(editor->pLastSelStartPara->type == diParagraph);
assert(editor->pLastSelEndPara->type == diParagraph);
}
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_ArrowHome(ME_TextEditor *editor, ME_Cursor *pCursor)
{
ME_DisplayItem *pRow = ME_FindItemBack(pCursor->pRun, diStartRow);
/* bCaretAtEnd doesn't make sense if the cursor isn't set at the
first character of the next row */
assert(!editor->bCaretAtEnd || !pCursor->nOffset);
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;
}
/* Selects the next table cell or appends a new table row if at end of table */
static void ME_SelectOrInsertNextCell(ME_TextEditor *editor,
ME_DisplayItem *run)
{
ME_DisplayItem *para = ME_GetParagraph(run);
int i;
assert(run && run->type == diRun);
assert(ME_IsInTable(run));
if (!editor->bEmulateVersion10) { /* v4.1 */
ME_DisplayItem *cell;
/* Get the initial cell */
if (para->member.para.nFlags & MEPF_ROWSTART) {
cell = para->member.para.next_para->member.para.pCell;
} else if (para->member.para.nFlags & MEPF_ROWEND) {
cell = para->member.para.prev_para->member.para.pCell;
} else {
cell = para->member.para.pCell;
}
assert(cell);
/* Get the next cell. */
if (cell->member.cell.next_cell &&
cell->member.cell.next_cell->member.cell.next_cell)
{
cell = cell->member.cell.next_cell;
} else {
para = ME_GetTableRowEnd(ME_FindItemFwd(cell, diParagraph));
para = para->member.para.next_para;
assert(para);
if (para->member.para.nFlags & MEPF_ROWSTART) {
cell = para->member.para.next_para->member.para.pCell;
} else {
/* Insert row */
para = para->member.para.prev_para;
para = ME_AppendTableRow(editor, ME_GetTableRowStart(para));
/* Put cursor at the start of the new table row */
para = para->member.para.next_para;
editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
editor->pCursors[0].nOffset = 0;
editor->pCursors[1] = editor->pCursors[0];
ME_WrapMarkedParagraphs(editor);
return;
}
}
/* Select cell */
editor->pCursors[1].pRun = ME_FindItemFwd(cell, diRun);
editor->pCursors[1].nOffset = 0;
assert(editor->pCursors[0].pRun);
cell = cell->member.cell.next_cell;
editor->pCursors[0].pRun = ME_FindItemBack(cell, diRun);
editor->pCursors[0].nOffset = 0;
assert(editor->pCursors[1].pRun);
} else { /* v1.0 - 3.0 */
if (run->member.run.nFlags & MERF_ENDPARA &&
ME_IsInTable(ME_FindItemFwd(run, diParagraphOrEnd)))
{
run = ME_FindItemFwd(run, diRun);
assert(run);
}
for (i = 0; i < 2; i++)
{
while (!(run->member.run.nFlags & MERF_TAB))
{
run = ME_FindItemFwd(run, diRunOrParagraphOrEnd);
if (run->type != diRun)
{
para = run;
if (ME_IsInTable(para))
{
run = ME_FindItemFwd(para, diRun);
assert(run);
editor->pCursors[0].pRun = run;
editor->pCursors[0].nOffset = 0;
i = 1;
} else {
/* Insert table row */
para = ME_AppendTableRow(editor, para->member.para.prev_para);
/* Put cursor at the start of the new table row */
editor->pCursors[0].pRun = ME_FindItemFwd(para, diRun);
editor->pCursors[0].nOffset = 0;
editor->pCursors[1] = editor->pCursors[0];
ME_WrapMarkedParagraphs(editor);
return;
}
}
}
if (i == 0)
run = ME_FindItemFwd(run, diRun);
editor->pCursors[i].pRun = run;
editor->pCursors[i].nOffset = 0;
}
}
}
