static BOOL ME_ReturnFoundPos(ME_TextEditor *editor, ME_DisplayItem *found,
ME_Cursor *result, int rx, BOOL isExact)
{
assert(found);
assert(found->type == diRun);
if ((found->member.run.nFlags & MERF_ENDPARA) || rx < 0)
rx = 0;
result->pRun = found;
result->nOffset = ME_CharFromPointCursor(editor, rx, &found->member.run);
if (editor->pCursors[0].nOffset == found->member.run.strText->nLen && rx)
{
result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
result->nOffset = 0;
}
return isExact;
}
static ME_DisplayItem *ME_FindRunInRow(ME_TextEditor *editor, ME_DisplayItem *pRow,
int x, int *pOffset, int *pbCaretAtEnd)
{
ME_DisplayItem *pNext, *pLastRun;
pNext = ME_FindItemFwd(pRow, diRunOrStartRow);
assert(pNext->type == diRun);
pLastRun = pNext;
*pbCaretAtEnd = FALSE;
do {
int run_x = pNext->member.run.pt.x;
int width = pNext->member.run.nWidth;
if (x < run_x)
{
if (pOffset) *pOffset = 0;
return pNext;
}
if (x >= run_x && x < run_x+width)
{
int ch = ME_CharFromPointCursor(editor, x-run_x, &pNext->member.run);
ME_String *s = pNext->member.run.strText;
if (ch < s->nLen) {
if (pOffset)
*pOffset = ch;
return pNext;
}
}
pLastRun = pNext;
pNext = ME_FindItemFwd(pNext, diRunOrStartRow);
} while(pNext && pNext->type == diRun);
if ((pLastRun->member.run.nFlags & MERF_ENDPARA) == 0)
{
pNext = ME_FindItemFwd(pNext, diRun);
if (pbCaretAtEnd) *pbCaretAtEnd = 1;
if (pOffset) *pOffset = 0;
return pNext;
} else {
if (pbCaretAtEnd) *pbCaretAtEnd = 0;
if (pOffset) *pOffset = 0;
return pLastRun;
}
}
static void ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
{
ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
ME_DisplayItem *last = NULL;
int rx = 0;
if (is_eol)
*is_eol = 0;
/* find paragraph */
for (; p != editor->pBuffer->pLast; p = p->member.para.next_para)
{
assert(p->type == diParagraph);
if (y < p->member.para.nYPos + p->member.para.nHeight)
{
y -= p->member.para.nYPos;
p = ME_FindItemFwd(p, diStartRow);
break;
}
}
/* find row */
for (; p != editor->pBuffer->pLast; )
{
ME_DisplayItem *pp;
assert(p->type == diStartRow);
if (y < p->member.row.nYPos + p->member.row.nHeight)
{
p = ME_FindItemFwd(p, diRun);
break;
}
pp = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
if (pp->type != diStartRow)
{
p = ME_FindItemFwd(p, diRun);
break;
}
p = pp;
}
for (; p != editor->pBuffer->pLast; p = p->next)
{
switch (p->type)
{
case diRun:
rx = x - p->member.run.pt.x;
if (rx < p->member.run.nWidth)
{
found_here:
assert(p->type == diRun);
if ((p->member.run.nFlags & MERF_ENDPARA) || rx < 0)
rx = 0;
result->pRun = p;
result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
{
result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
result->nOffset = 0;
}
return;
}
break;
case diStartRow:
p = ME_FindItemFwd(p, diRun);
if (is_eol) *is_eol = 1;
rx = 0; /* FIXME not sure */
goto found_here;
case diParagraph:
case diTextEnd:
rx = 0; /* FIXME not sure */
p = last;
goto found_here;
default: assert(0);
}
last = p;
}
result->pRun = ME_FindItemBack(p, diRun);
result->nOffset = 0;
assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
}
int ME_FindPixelPos(ME_TextEditor *editor, int x, int y, ME_Cursor *result, BOOL *is_eol)
{
ME_DisplayItem *p = editor->pBuffer->pFirst->member.para.next_para;
int rx = 0;
if (is_eol)
*is_eol = 0;
while(p != editor->pBuffer->pLast)
{
if (p->type == diParagraph)
{
int ry = y - p->member.para.nYPos;
if (ry < 0)
{
result->pRun = ME_FindItemFwd(p, diRun);
result->nOffset = 0;
return 0;
}
if (ry >= p->member.para.nHeight)
{
p = p->member.para.next_para;
continue;
}
p = ME_FindItemFwd(p, diStartRow);
y = ry;
continue;
}
if (p->type == diStartRow)
{
int ry = y - p->member.row.nYPos;
if (ry < 0)
return 0;
if (ry >= p->member.row.nHeight)
{
p = ME_FindItemFwd(p, diStartRowOrParagraphOrEnd);
if (p->type != diStartRow)
return 0;
continue;
}
p = ME_FindItemFwd(p, diRun);
continue;
}
if (p->type == diRun)
{
ME_DisplayItem *pp;
rx = x - p->member.run.pt.x;
if (rx < 0)
rx = 0;
if (rx >= p->member.run.nWidth) /* not this run yet... find next item */
{
pp = p;
do {
p = p->next;
if (p->type == diRun)
{
rx = x - p->member.run.pt.x;
goto continue_search;
}
if (p->type == diStartRow)
{
p = ME_FindItemFwd(p, diRun);
if (is_eol)
*is_eol = 1;
rx = 0; /* FIXME not sure */
goto found_here;
}
if (p->type == diParagraph || p->type == diTextEnd)
{
rx = 0; /* FIXME not sure */
p = pp;
goto found_here;
}
} while(1);
continue;
}
found_here:
if (p->member.run.nFlags & MERF_ENDPARA)
rx = 0;
result->pRun = p;
result->nOffset = ME_CharFromPointCursor(editor, rx, &p->member.run);
if (editor->pCursors[0].nOffset == p->member.run.strText->nLen && rx)
{
result->pRun = ME_FindItemFwd(editor->pCursors[0].pRun, diRun);
result->nOffset = 0;
}
return 1;
}
assert(0);
continue_search:
;
}
result->pRun = ME_FindItemBack(p, diRun);
result->nOffset = 0;
assert(result->pRun->member.run.nFlags & MERF_ENDPARA);
return 0;
}