static void ME_ArrowPageDown(ME_TextEditor *editor, ME_Cursor *pCursor)
{
ME_DisplayItem *pLast;
int x, y;
/* Find y position of the last row */
pLast = editor->pBuffer->pLast;
y = pLast->member.para.prev_para->member.para.pt.y
+ ME_FindItemBack(pLast, diStartRow)->member.row.pt.y;
x = ME_GetXForArrow(editor, pCursor);
if (editor->vert_si.nPos >= y - editor->sizeWindow.cy)
{
pCursor->pRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
pCursor->nOffset = 0;
editor->bCaretAtEnd = FALSE;
} else {
ME_DisplayItem *pRun = pCursor->pRun;
ME_DisplayItem *p;
int ys, yd, yp, yprev;
int yOldScrollPos = editor->vert_si.nPos;
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;
yprev = ys = y = yp + p->member.row.pt.y;
/* For native richedit controls:
* v1.0 - v3.1 can only scroll down as far as the scrollbar lets us
* v4.1 can scroll past this position here. */
ME_ScrollDown(editor, editor->sizeWindow.cy);
/* Only move the cursor by the amount scrolled. */
yd = y + editor->vert_si.nPos - yOldScrollPos;
pLast = p;
do {
p = ME_FindItemFwd(p, diStartRowOrParagraph);
if (!p)
break;
if (p->type == diParagraph) {
yp = p->member.para.pt.y;
continue;
}
y = yp + p->member.row.pt.y;
if (y >= yd)
break;
pLast = p;
yprev = y;
} while(1);
pCursor->pRun = ME_FindRunInRow(editor, pLast, x, &pCursor->nOffset,
&editor->bCaretAtEnd);
}
assert(pCursor->pRun);
assert(pCursor->pRun->type == diRun);
}
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 *p = ME_FindItemFwd(editor->pBuffer->pFirst, diStartRow);
if (editor->vert_si.nPos < p->member.row.nHeight)
{
pCursor->pRun = ME_FindItemFwd(editor->pBuffer->pFirst, diRun);
pCursor->nOffset = 0;
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, ys, yd, yp, yprev;
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;
yprev = ys = 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;
yprev = y;
} while(1);
pCursor->pRun = ME_FindRunInRow(editor, pLast, 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);
}
static void
ME_MoveCursorLines(ME_TextEditor *editor, ME_Cursor *pCursor, int nRelOfs)
{
ME_DisplayItem *pRun = pCursor->pRun;
ME_DisplayItem *pItem, *pOldPara, *pNewPara;
int x = ME_GetXForArrow(editor, pCursor);
if (editor->bCaretAtEnd && !pCursor->nOffset)
pRun = ME_FindItemBack(pRun, diRun);
if (!pRun)
return;
pOldPara = ME_GetParagraph(pRun);
if (nRelOfs == -1)
{
/* start of this row */
pItem = ME_FindItemBack(pRun, diStartRow);
assert(pItem);
/* start of the previous row */
pItem = ME_FindItemBack(pItem, diStartRow);
if (!pItem)
return; /* row not found - ignore */
pNewPara = ME_GetParagraph(pItem);
if (pOldPara->member.para.nFlags & MEPF_ROWEND ||
(pOldPara->member.para.pCell &&
pOldPara->member.para.pCell != pNewPara->member.para.pCell))
{
/* Brought out of a cell */
pNewPara = ME_GetTableRowStart(pOldPara)->member.para.prev_para;
if (pNewPara->type == diTextStart)
return; /* At the top, so don't go anywhere. */
pItem = ME_FindItemFwd(pNewPara, diStartRow);
}
if (pNewPara->member.para.nFlags & MEPF_ROWEND)
{
/* Brought into a table row */
ME_Cell *cell = &ME_FindItemBack(pNewPara, diCell)->member.cell;
while (x < cell->pt.x && cell->prev_cell)
cell = &cell->prev_cell->member.cell;
if (cell->next_cell) /* else - we are still at the end of the row */
pItem = ME_FindItemBack(cell->next_cell, diStartRow);
}
}
else
{
/* start of the next row */
pItem = ME_FindItemFwd(pRun, diStartRow);
if (!pItem)
return; /* row not found - ignore */
/* FIXME If diParagraph is before diStartRow, wrap the next paragraph?
*/
pNewPara = ME_GetParagraph(pItem);
if (pOldPara->member.para.nFlags & MEPF_ROWSTART ||
(pOldPara->member.para.pCell &&
pOldPara->member.para.pCell != pNewPara->member.para.pCell))
{
/* Brought out of a cell */
pNewPara = ME_GetTableRowEnd(pOldPara)->member.para.next_para;
if (pNewPara->type == diTextEnd)
return; /* At the bottom, so don't go anywhere. */
pItem = ME_FindItemFwd(pNewPara, diStartRow);
}
if (pNewPara->member.para.nFlags & MEPF_ROWSTART)
{
/* Brought into a table row */
ME_DisplayItem *cell = ME_FindItemFwd(pNewPara, diCell);
while (cell->member.cell.next_cell &&
x >= cell->member.cell.next_cell->member.cell.pt.x)
cell = cell->member.cell.next_cell;
pItem = ME_FindItemFwd(cell, diStartRow);
}
}
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);
}
