static void ME_WrapSizeRun(ME_WrapContext *wc, ME_DisplayItem *p)
{
/* FIXME compose style (out of character and paragraph styles) here */
ME_UpdateRunFlags(wc->context->editor, &p->member.run);
calc_run_extent(wc->context, &wc->pPara->member.para,
wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, &p->member.run);
}
/******************************************************************************
* split_run_extents
*
* Splits a run into two in a given place. It also updates the screen position
* and size (extent) of the newly generated runs.
*/
static ME_DisplayItem *split_run_extents(ME_WrapContext *wc, ME_DisplayItem *item, int nVChar)
{
ME_TextEditor *editor = wc->context->editor;
ME_Run *run, *run2;
ME_Paragraph *para = &wc->pPara->member.para;
ME_Cursor cursor = {wc->pPara, item, nVChar};
assert(item->member.run.nCharOfs != -1);
if(TRACE_ON(richedit))
{
TRACE("Before check before split\n");
ME_CheckCharOffsets(editor);
TRACE("After check before split\n");
}
run = &item->member.run;
TRACE("Before split: %s(%d, %d)\n", debugstr_run( run ),
run->pt.x, run->pt.y);
ME_SplitRunSimple(editor, &cursor);
run2 = &cursor.pRun->member.run;
calc_run_extent(wc->context, para, wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, run);
run2->pt.x = run->pt.x+run->nWidth;
run2->pt.y = run->pt.y;
if(TRACE_ON(richedit))
{
TRACE("Before check after split\n");
ME_CheckCharOffsets(editor);
TRACE("After check after split\n");
TRACE("After split: %s(%d, %d), %s(%d, %d)\n",
debugstr_run( run ), run->pt.x, run->pt.y,
debugstr_run( run2 ), run2->pt.x, run2->pt.y);
}
return cursor.pRun;
}
static ME_DisplayItem *ME_WrapHandleRun(ME_WrapContext *wc, ME_DisplayItem *p)
{
ME_DisplayItem *pp;
ME_Run *run;
int len;
assert(p->type == diRun);
if (!wc->pRowStart)
wc->pRowStart = p;
run = &p->member.run;
run->pt.x = wc->pt.x;
run->pt.y = wc->pt.y;
ME_WrapSizeRun(wc, p);
len = run->len;
if (wc->bOverflown) /* just skipping final whitespaces */
{
/* End paragraph run can't overflow to the next line by itself. */
if (run->nFlags & MERF_ENDPARA)
return p->next;
if (run->nFlags & MERF_WHITESPACE) {
wc->pt.x += run->nWidth;
/* skip runs consisting of only whitespaces */
return p->next;
}
if (run->nFlags & MERF_STARTWHITE) {
/* try to split the run at the first non-white char */
int black;
black = find_non_whitespace( get_text( run, 0 ), run->len, 0 );
if (black) {
wc->bOverflown = FALSE;
pp = split_run_extents(wc, p, black);
calc_run_extent(wc->context, &wc->pPara->member.para,
wc->nRow ? wc->nLeftMargin : wc->nFirstMargin,
&pp->member.run);
ME_InsertRowStart(wc, pp);
return pp;
}
}
/* black run: the row goes from pRowStart to the previous run */
ME_InsertRowStart(wc, p);
return p;
}
/* simply end the current row and move on to next one */
if (run->nFlags & MERF_ENDROW)
{
p = p->next;
ME_InsertRowStart(wc, p);
return p;
}
/* will current run fit? */
if (wc->bWordWrap &&
wc->pt.x + run->nWidth - wc->context->pt.x > wc->nAvailWidth)
{
int loc = wc->context->pt.x + wc->nAvailWidth - wc->pt.x;
/* total white run ? */
if (run->nFlags & MERF_WHITESPACE) {
/* let the overflow logic handle it */
wc->bOverflown = TRUE;
return p;
}
/* TAB: we can split before */
if (run->nFlags & MERF_TAB) {
wc->bOverflown = TRUE;
if (wc->pRowStart == p)
/* Don't split before the start of the run, or we will get an
* endless loop. */
return p->next;
else
return p;
}
/* graphics: we can split before, if run's width is smaller than row's width */
if ((run->nFlags & MERF_GRAPHICS) && run->nWidth <= wc->nAvailWidth) {
wc->bOverflown = TRUE;
return p;
}
/* can we separate out the last spaces ? (to use overflow logic later) */
if (run->nFlags & MERF_ENDWHITE)
{
/* we aren't sure if it's *really* necessary, it's a good start however */
int black = reverse_find_non_whitespace( get_text( run, 0 ), len );
split_run_extents(wc, p, black);
/* handle both parts again */
return p;
}
/* determine the split point by backtracking */
pp = ME_SplitByBacktracking(wc, p, loc);
if (pp == wc->pRowStart)
{
if (run->nFlags & MERF_STARTWHITE)
{
/* We had only spaces so far, so we must be on the first line of the
* paragraph (or the first line after MERF_ENDROW forced the line
* break within the paragraph), since no other lines of the paragraph
* start with spaces. */
/* The lines will only contain spaces, and the rest of the run will
* overflow onto the next line. */
wc->bOverflown = TRUE;
return p;
}
/* Couldn't split the first run, possible because we have a large font
* with a single character that caused an overflow.
*/
wc->pt.x += run->nWidth;
return p->next;
}
if (p != pp) /* found a suitable split point */
{
wc->bOverflown = TRUE;
return pp;
}
/* we detected that it's best to split on start of this run */
if (wc->bOverflown)
return pp;
ERR("failure!\n");
/* not found anything - writing over margins is the only option left */
}
if ((run->nFlags & (MERF_SPLITTABLE | MERF_STARTWHITE))
|| ((run->nFlags & (MERF_GRAPHICS|MERF_TAB)) && (p != wc->pRowStart)))
{
wc->pLastSplittableRun = p;
}
wc->pt.x += run->nWidth;
return p->next;
}
