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reactos/dll/win32/riched20/wrap.c

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/*
* RichEdit - Paragraph wrapping. Don't try to understand it. You've been
* warned !
*
* Copyright 2004 by Krzysztof Foltman
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "editor.h"
WINE_DEFAULT_DEBUG_CHANNEL(richedit);
/*
* Unsolved problems:
*
* - center and right align in WordPad omits all spaces at the start, we don't
* - objects/images are not handled yet
* - no tabs
*/
typedef struct tagME_WrapContext
{
ME_Style *style;
ME_Context *context;
int nLeftMargin, nRightMargin;
int nFirstMargin; /* Offset to first line's text, always to the text itself even if a para number is present */
int nParaNumOffset; /* Offset to the para number */
int nAvailWidth; /* Width avail for text to wrap into. Does not include any para number text */
int nRow;
POINT pt;
BOOL bOverflown, bWordWrap;
ME_DisplayItem *pPara;
ME_DisplayItem *pRowStart;
ME_DisplayItem *pLastSplittableRun;
} ME_WrapContext;
static BOOL get_run_glyph_buffers( ME_Run *run )
{
heap_free( run->glyphs );
run->glyphs = heap_alloc( run->max_glyphs * (sizeof(WORD) + sizeof(SCRIPT_VISATTR) + sizeof(int) + sizeof(GOFFSET)) );
if (!run->glyphs) return FALSE;
run->vis_attrs = (SCRIPT_VISATTR*)((char*)run->glyphs + run->max_glyphs * sizeof(WORD));
run->advances = (int*)((char*)run->glyphs + run->max_glyphs * (sizeof(WORD) + sizeof(SCRIPT_VISATTR)));
run->offsets = (GOFFSET*)((char*)run->glyphs + run->max_glyphs * (sizeof(WORD) + sizeof(SCRIPT_VISATTR) + sizeof(int)));
return TRUE;
}
static HRESULT shape_run( ME_Context *c, ME_Run *run )
{
HRESULT hr;
int i;
if (!run->glyphs)
{
run->max_glyphs = 1.5 * run->len + 16; /* This is suggested in the uniscribe documentation */
run->max_glyphs = (run->max_glyphs + 7) & ~7; /* Keep alignment simple */
get_run_glyph_buffers( run );
}
if (run->max_clusters < run->len)
{
heap_free( run->clusters );
run->max_clusters = run->len * 2;
run->clusters = heap_alloc( run->max_clusters * sizeof(WORD) );
}
select_style( c, run->style );
while (1)
{
hr = ScriptShape( c->hDC, &run->style->script_cache, get_text( run, 0 ), run->len, run->max_glyphs,
&run->script_analysis, run->glyphs, run->clusters, run->vis_attrs, &run->num_glyphs );
if (hr != E_OUTOFMEMORY) break;
if (run->max_glyphs > 10 * run->len) break; /* something has clearly gone wrong */
run->max_glyphs *= 2;
get_run_glyph_buffers( run );
}
if (SUCCEEDED(hr))
hr = ScriptPlace( c->hDC, &run->style->script_cache, run->glyphs, run->num_glyphs, run->vis_attrs,
&run->script_analysis, run->advances, run->offsets, NULL );
if (SUCCEEDED(hr))
{
for (i = 0, run->nWidth = 0; i < run->num_glyphs; i++)
run->nWidth += run->advances[i];
}
return hr;
}
/******************************************************************************
* calc_run_extent
*
* Updates the size of the run (fills width, ascent and descent). The height
* is calculated based on whole row's ascent and descent anyway, so no need
* to use it here.
*/
static void calc_run_extent(ME_Context *c, const ME_Paragraph *para, int startx, ME_Run *run)
{
if (run->nFlags & MERF_HIDDEN) run->nWidth = 0;
else
{
SIZE size = ME_GetRunSizeCommon( c, para, run, run->len, startx, &run->nAscent, &run->nDescent );
run->nWidth = size.cx;
}
}
/******************************************************************************
* 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);
ME_CheckCharOffsets(editor);
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;
run2->script_analysis = run->script_analysis;
shape_run( wc->context, run );
shape_run( wc->context, run2 );
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;
ME_CheckCharOffsets(editor);
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;
}
/******************************************************************************
* find_split_point
*
* Returns a character position to split inside the run given a run-relative
* pixel horizontal position. This version rounds left (ie. if the second
* character is at pixel position 8, then for cx=0..7 it returns 0).
*/
static int find_split_point( ME_Context *c, int cx, ME_Run *run )
{
if (!run->len || cx <= 0) return 0;
return ME_CharFromPointContext( c, cx, run, FALSE, FALSE );
}
static ME_DisplayItem *ME_MakeRow(int height, int baseline, int width)
{
ME_DisplayItem *item = ME_MakeDI(diStartRow);
item->member.row.nHeight = height;
item->member.row.nBaseline = baseline;
item->member.row.nWidth = width;
return item;
}
static void ME_BeginRow(ME_WrapContext *wc)
{
PARAFORMAT2 *pFmt;
ME_DisplayItem *para = wc->pPara;
pFmt = &para->member.para.fmt;
wc->pRowStart = NULL;
wc->bOverflown = FALSE;
wc->pLastSplittableRun = NULL;
wc->bWordWrap = wc->context->editor->bWordWrap;
if (para->member.para.nFlags & (MEPF_ROWSTART|MEPF_ROWEND)) {
wc->nAvailWidth = 0;
wc->bWordWrap = FALSE;
if (para->member.para.nFlags & MEPF_ROWEND)
{
ME_Cell *cell = &ME_FindItemBack(para, diCell)->member.cell;
cell->nWidth = 0;
}
} else if (para->member.para.pCell) {
ME_Cell *cell = &para->member.para.pCell->member.cell;
int width;
width = cell->nRightBoundary;
if (cell->prev_cell)
width -= cell->prev_cell->member.cell.nRightBoundary;
if (!cell->prev_cell)
{
int rowIndent = ME_GetTableRowEnd(para)->member.para.fmt.dxStartIndent;
width -= rowIndent;
}
cell->nWidth = max(ME_twips2pointsX(wc->context, width), 0);
wc->nAvailWidth = cell->nWidth
- (wc->nRow ? wc->nLeftMargin : wc->nFirstMargin) - wc->nRightMargin;
wc->bWordWrap = TRUE;
} else {
wc->nAvailWidth = wc->context->nAvailWidth
- (wc->nRow ? wc->nLeftMargin : wc->nFirstMargin) - wc->nRightMargin;
}
wc->pt.x = wc->context->pt.x;
if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
/* Shift the text down because of the border. */
wc->pt.y++;
}
static void layout_row( ME_DisplayItem *start, const ME_DisplayItem *end )
{
ME_DisplayItem *p;
int i, num_runs = 0;
int buf[16 * 5]; /* 5 arrays - 4 of int & 1 of BYTE, alloc space for 5 of ints */
int *vis_to_log = buf, *log_to_vis, *widths, *pos;
BYTE *levels;
BOOL found_black = FALSE;
for (p = end->prev; p != start->prev; p = p->prev)
{
if (p->type == diRun)
{
if (!found_black) found_black = !(p->member.run.nFlags & (MERF_WHITESPACE | MERF_ENDPARA));
if (found_black) num_runs++;
}
}
TRACE("%d runs\n", num_runs);
if (!num_runs) return;
if (num_runs > ARRAY_SIZE( buf ) / 5)
vis_to_log = heap_alloc( num_runs * sizeof(int) * 5 );
log_to_vis = vis_to_log + num_runs;
widths = vis_to_log + 2 * num_runs;
pos = vis_to_log + 3 * num_runs;
levels = (BYTE*)(vis_to_log + 4 * num_runs);
for (i = 0, p = start; i < num_runs; p = p->next)
{
if (p->type == diRun)
{
levels[i] = p->member.run.script_analysis.s.uBidiLevel;
widths[i] = p->member.run.nWidth;
TRACE( "%d: level %d width %d\n", i, levels[i], widths[i] );
i++;
}
}
ScriptLayout( num_runs, levels, vis_to_log, log_to_vis );
pos[0] = start->member.run.para->pt.x;
for (i = 1; i < num_runs; i++)
pos[i] = pos[i - 1] + widths[ vis_to_log[ i - 1 ] ];
for (i = 0, p = start; i < num_runs; p = p->next)
{
if (p->type == diRun)
{
p->member.run.pt.x = pos[ log_to_vis[ i ] ];
TRACE( "%d: x = %d\n", i, p->member.run.pt.x );
i++;
}
}
if (vis_to_log != buf) heap_free( vis_to_log );
}
static void ME_InsertRowStart(ME_WrapContext *wc, const ME_DisplayItem *pEnd)
{
ME_DisplayItem *p, *row;
ME_Paragraph *para = &wc->pPara->member.para;
BOOL bSkippingSpaces = TRUE;
int ascent = 0, descent = 0, width=0, shift = 0, align = 0;
/* Include height of para numbering label */
if (wc->nRow == 0 && para->fmt.wNumbering)
{
ascent = para->para_num.style->tm.tmAscent;
descent = para->para_num.style->tm.tmDescent;
}
for (p = pEnd->prev; p!=wc->pRowStart->prev; p = p->prev)
{
/* ENDPARA run shouldn't affect row height, except if it's the only run in the paragraph */
if (p->type==diRun && ((p==wc->pRowStart) || !(p->member.run.nFlags & MERF_ENDPARA))) { /* FIXME add more run types */
if (p->member.run.nAscent>ascent)
ascent = p->member.run.nAscent;
if (p->member.run.nDescent>descent)
descent = p->member.run.nDescent;
if (bSkippingSpaces)
{
/* Exclude space characters from run width.
* Other whitespace or delimiters are not treated this way. */
int len = p->member.run.len;
WCHAR *text = get_text( &p->member.run, len - 1 );
assert (len);
if (~p->member.run.nFlags & MERF_GRAPHICS)
while (len && *(text--) == ' ')
len--;
if (len)
{
if (len == p->member.run.len)
width += p->member.run.nWidth;
else
width += ME_PointFromCharContext( wc->context, &p->member.run, len, FALSE );
}
bSkippingSpaces = !len;
} else if (!(p->member.run.nFlags & MERF_ENDPARA))
width += p->member.run.nWidth;
}
}
para->nWidth = max(para->nWidth, width);
row = ME_MakeRow(ascent+descent, ascent, width);
if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
(para->fmt.dwMask & PFM_TABLE) && (para->fmt.wEffects & PFE_TABLE))
{
/* The text was shifted down in ME_BeginRow so move the wrap context
* back to where it should be. */
wc->pt.y--;
/* The height of the row is increased by the borders. */
row->member.row.nHeight += 2;
}
row->member.row.pt = wc->pt;
row->member.row.nLMargin = (!wc->nRow ? wc->nFirstMargin : wc->nLeftMargin);
row->member.row.nRMargin = wc->nRightMargin;
assert(para->fmt.dwMask & PFM_ALIGNMENT);
align = para->fmt.wAlignment;
if (align == PFA_CENTER)
shift = max((wc->nAvailWidth-width)/2, 0);
if (align == PFA_RIGHT)
shift = max(wc->nAvailWidth-width, 0);
if (para->nFlags & MEPF_COMPLEX) layout_row( wc->pRowStart, pEnd );
row->member.row.pt.x = row->member.row.nLMargin + shift;
for (p = wc->pRowStart; p!=pEnd; p = p->next)
{
if (p->type==diRun) { /* FIXME add more run types */
p->member.run.pt.x += row->member.row.nLMargin+shift;
}
}
if (wc->nRow == 0 && para->fmt.wNumbering)
{
para->para_num.pt.x = wc->nParaNumOffset + shift;
para->para_num.pt.y = wc->pt.y + row->member.row.nBaseline;
}
ME_InsertBefore(wc->pRowStart, row);
wc->nRow++;
wc->pt.y += row->member.row.nHeight;
ME_BeginRow(wc);
}
static void ME_WrapEndParagraph(ME_WrapContext *wc, ME_DisplayItem *p)
{
ME_DisplayItem *para = wc->pPara;
PARAFORMAT2 *pFmt = &para->member.para.fmt;
if (wc->pRowStart)
ME_InsertRowStart(wc, p);
if (wc->context->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
{
/* ME_BeginRow was called an extra time for the paragraph, and it shifts the
* text down by one pixel for the border, so fix up the wrap context. */
wc->pt.y--;
}
/*
p = para->next;
while(p) {
if (p->type == diParagraph || p->type == diTextEnd)
return;
if (p->type == diRun)
{
ME_Run *run = &p->member.run;
TRACE("%s - (%d, %d)\n", debugstr_run(run), run->pt.x, run->pt.y);
}
p = p->next;
}
*/
}
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);
}
static int find_non_whitespace(const WCHAR *s, int len, int start)
{
int i;
for (i = start; i < len && ME_IsWSpace( s[i] ); i++)
;
return i;
}
/* note: these two really return the first matching offset (starting from EOS)+1
* in other words, an offset of the first trailing white/black */
/* note: returns offset of the first trailing whitespace */
static int reverse_find_non_whitespace(const WCHAR *s, int start)
{
int i;
for (i = start; i > 0 && ME_IsWSpace( s[i - 1] ); i--)
;
return i;
}
/* note: returns offset of the first trailing nonwhitespace */
static int reverse_find_whitespace(const WCHAR *s, int start)
{
int i;
for (i = start; i > 0 && !ME_IsWSpace( s[i - 1] ); i--)
;
return i;
}
static ME_DisplayItem *ME_MaximizeSplit(ME_WrapContext *wc, ME_DisplayItem *p, int i)
{
ME_DisplayItem *pp, *piter = p;
int j;
if (!i)
return NULL;
j = reverse_find_non_whitespace( get_text( &p->member.run, 0 ), i);
if (j>0) {
pp = split_run_extents(wc, piter, j);
wc->pt.x += piter->member.run.nWidth;
return pp;
}
else
{
pp = piter;
/* omit all spaces before split point */
while(piter != wc->pRowStart)
{
piter = ME_FindItemBack(piter, diRun);
if (piter->member.run.nFlags & MERF_WHITESPACE)
{
pp = piter;
continue;
}
if (piter->member.run.nFlags & MERF_ENDWHITE)
{
i = reverse_find_non_whitespace( get_text( &piter->member.run, 0 ),
piter->member.run.len );
pp = split_run_extents(wc, piter, i);
wc->pt = pp->member.run.pt;
return pp;
}
/* this run is the end of spaces, so the run edge is a good point to split */
wc->pt = pp->member.run.pt;
wc->bOverflown = TRUE;
TRACE("Split point is: %s|%s\n", debugstr_run( &piter->member.run ), debugstr_run( &pp->member.run ));
return pp;
}
wc->pt = piter->member.run.pt;
return piter;
}
}
static ME_DisplayItem *ME_SplitByBacktracking(ME_WrapContext *wc, ME_DisplayItem *p, int loc)
{
ME_DisplayItem *piter = p, *pp;
int i, idesp, len;
ME_Run *run = &p->member.run;
idesp = i = find_split_point( wc->context, loc, run );
len = run->len;
assert(len>0);
assert(i<len);
if (i) {
/* don't split words */
i = reverse_find_whitespace( get_text( run, 0 ), i );
pp = ME_MaximizeSplit(wc, p, i);
if (pp)
return pp;
}
TRACE("Must backtrack to split at: %s\n", debugstr_run( &p->member.run ));
if (wc->pLastSplittableRun)
{
if (wc->pLastSplittableRun->member.run.nFlags & (MERF_GRAPHICS|MERF_TAB))
{
wc->pt = wc->pLastSplittableRun->member.run.pt;
return wc->pLastSplittableRun;
}
else if (wc->pLastSplittableRun->member.run.nFlags & MERF_SPLITTABLE)
{
/* the following two lines are just to check if we forgot to call UpdateRunFlags earlier,
they serve no other purpose */
ME_UpdateRunFlags(wc->context->editor, run);
assert((wc->pLastSplittableRun->member.run.nFlags & MERF_SPLITTABLE));
piter = wc->pLastSplittableRun;
run = &piter->member.run;
len = run->len;
/* don't split words */
i = reverse_find_whitespace( get_text( run, 0 ), len );
if (i == len)
i = reverse_find_non_whitespace( get_text( run, 0 ), len );
if (i) {
ME_DisplayItem *piter2 = split_run_extents(wc, piter, i);
wc->pt = piter2->member.run.pt;
return piter2;
}
/* splittable = must have whitespaces */
assert(0 == "Splittable, but no whitespaces");
}
else
{
/* restart from the first run beginning with spaces */
wc->pt = wc->pLastSplittableRun->member.run.pt;
return wc->pLastSplittableRun;
}
}
TRACE("Backtracking failed, trying desperate: %s\n", debugstr_run( &p->member.run ));
/* OK, no better idea, so assume we MAY split words if we can split at all*/
if (idesp)
return split_run_extents(wc, piter, idesp);
else
if (wc->pRowStart && piter != wc->pRowStart)
{
/* don't need to break current run, because it's possible to split
before this run */
wc->bOverflown = TRUE;
return piter;
}
else
{
/* split point inside first character - no choice but split after that char */
if (len != 1) {
/* the run is more than 1 char, so we may split */
return split_run_extents(wc, piter, 1);
}
/* the run is one char, can't split it */
return piter;
}
}
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 or end para */
if (run->nFlags & (MERF_WHITESPACE | MERF_ENDPARA)) {
/* 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;
}
static int ME_GetParaLineSpace(ME_Context* c, ME_Paragraph* para)
{
int sp = 0, ls = 0;
if (!(para->fmt.dwMask & PFM_LINESPACING)) return 0;
/* FIXME: how to compute simply the line space in ls ??? */
/* FIXME: does line spacing include the line itself ??? */
switch (para->fmt.bLineSpacingRule)
{
case 0: sp = ls; break;
case 1: sp = (3 * ls) / 2; break;
case 2: sp = 2 * ls; break;
case 3: sp = ME_twips2pointsY(c, para->fmt.dyLineSpacing); if (sp < ls) sp = ls; break;
case 4: sp = ME_twips2pointsY(c, para->fmt.dyLineSpacing); break;
case 5: sp = para->fmt.dyLineSpacing / 20; break;
default: FIXME("Unsupported spacing rule value %d\n", para->fmt.bLineSpacingRule);
}
if (c->editor->nZoomNumerator == 0)
return sp;
else
return sp * c->editor->nZoomNumerator / c->editor->nZoomDenominator;
}
static void ME_PrepareParagraphForWrapping(ME_TextEditor *editor, ME_Context *c, ME_DisplayItem *tp) {
ME_DisplayItem *p;
tp->member.para.nWidth = 0;
/* remove row start items as they will be reinserted by the
* paragraph wrapper anyway */
editor->total_rows -= tp->member.para.nRows;
tp->member.para.nRows = 0;
for (p = tp->next; p != tp->member.para.next_para; p = p->next) {
if (p->type == diStartRow) {
ME_DisplayItem *pRow = p;
p = p->prev;
ME_Remove(pRow);
ME_DestroyDisplayItem(pRow);
}
}
/* join runs that can be joined */
for (p = tp->next; p != tp->member.para.next_para; p = p->next) {
assert(p->type != diStartRow); /* should have been deleted above */
if (p->type == diRun) {
while (p->next->type == diRun && /* FIXME */
ME_CanJoinRuns(&p->member.run, &p->next->member.run)) {
ME_JoinRuns(c->editor, p);
}
}
}
}
static HRESULT itemize_para( ME_Context *c, ME_DisplayItem *p )
{
ME_Paragraph *para = &p->member.para;
ME_Run *run;
ME_DisplayItem *di;
SCRIPT_ITEM buf[16], *items = buf;
int items_passed = ARRAY_SIZE( buf ), num_items, cur_item;
SCRIPT_CONTROL control = { LANG_USER_DEFAULT, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE,
FALSE, FALSE, 0 };
SCRIPT_STATE state = { 0, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, 0, 0 };
HRESULT hr;
assert( p->type == diParagraph );
if (para->fmt.dwMask & PFM_RTLPARA && para->fmt.wEffects & PFE_RTLPARA)
state.uBidiLevel = 1;
TRACE( "Base embedding level %d\n", state.uBidiLevel );
while (1)
{
hr = ScriptItemize( para->text->szData, para->text->nLen, items_passed, &control,
&state, items, &num_items );
if (hr != E_OUTOFMEMORY) break; /* may not be enough items if hr == E_OUTOFMEMORY */
if (items_passed > para->text->nLen + 1) break; /* something else has gone wrong */
items_passed *= 2;
if (items == buf)
items = heap_alloc( items_passed * sizeof( *items ) );
else
items = heap_realloc( items, items_passed * sizeof( *items ) );
if (!items) break;
}
if (FAILED( hr )) goto end;
if (TRACE_ON( richedit ))
{
TRACE( "got items:\n" );
for (cur_item = 0; cur_item < num_items; cur_item++)
{
TRACE( "\t%d - %d RTL %d bidi level %d\n", items[cur_item].iCharPos, items[cur_item+1].iCharPos - 1,
items[cur_item].a.fRTL, items[cur_item].a.s.uBidiLevel );
}
TRACE( "before splitting runs into ranges\n" );
for (di = p->next; di != p->member.para.next_para; di = di->next)
{
if (di->type != diRun) continue;
TRACE( "\t%d: %s\n", di->member.run.nCharOfs, debugstr_run( &di->member.run ) );
}
}
/* split runs into ranges at item boundaries */
for (di = p->next, cur_item = 0; di != p->member.para.next_para; di = di->next)
{
if (di->type != diRun) continue;
run = &di->member.run;
if (run->nCharOfs == items[cur_item+1].iCharPos) cur_item++;
items[cur_item].a.fLogicalOrder = TRUE;
run->script_analysis = items[cur_item].a;
if (run->nFlags & MERF_ENDPARA) break; /* don't split eop runs */
if (run->nCharOfs + run->len > items[cur_item+1].iCharPos)
{
ME_Cursor cursor = {p, di, items[cur_item+1].iCharPos - run->nCharOfs};
ME_SplitRunSimple( c->editor, &cursor );
}
}
if (TRACE_ON( richedit ))
{
TRACE( "after splitting into ranges\n" );
for (di = p->next; di != p->member.para.next_para; di = di->next)
{
if (di->type != diRun) continue;
TRACE( "\t%d: %s\n", di->member.run.nCharOfs, debugstr_run( &di->member.run ) );
}
}
para->nFlags |= MEPF_COMPLEX;
end:
if (items != buf) heap_free( items );
return hr;
}
static HRESULT shape_para( ME_Context *c, ME_DisplayItem *p )
{
ME_DisplayItem *di;
ME_Run *run;
HRESULT hr;
for (di = p->next; di != p->member.para.next_para; di = di->next)
{
if (di->type != diRun) continue;
run = &di->member.run;
hr = shape_run( c, run );
if (FAILED( hr ))
{
run->para->nFlags &= ~MEPF_COMPLEX;
return hr;
}
}
return hr;
}
static void ME_WrapTextParagraph(ME_TextEditor *editor, ME_Context *c, ME_DisplayItem *tp) {
ME_DisplayItem *p;
ME_WrapContext wc;
int border = 0;
int linespace = 0;
PARAFORMAT2 *pFmt;
assert(tp->type == diParagraph);
if (!(tp->member.para.nFlags & MEPF_REWRAP)) {
return;
}
ME_PrepareParagraphForWrapping(editor, c, tp);
/* Calculate paragraph numbering label */
para_num_init( c, &tp->member.para );
/* For now treating all non-password text as complex for better testing */
if (!c->editor->cPasswordMask /* &&
ScriptIsComplex( tp->member.para.text->szData, tp->member.para.text->nLen, SIC_COMPLEX ) == S_OK */)
{
if (SUCCEEDED( itemize_para( c, tp ) ))
shape_para( c, tp );
}
pFmt = &tp->member.para.fmt;
wc.context = c;
wc.pPara = tp;
/* wc.para_style = tp->member.para.style; */
wc.style = NULL;
wc.nParaNumOffset = 0;
if (tp->member.para.nFlags & MEPF_ROWEND) {
wc.nFirstMargin = wc.nLeftMargin = wc.nRightMargin = 0;
} else {
int dxStartIndent = pFmt->dxStartIndent;
if (tp->member.para.pCell) {
dxStartIndent += ME_GetTableRowEnd(tp)->member.para.fmt.dxOffset;
}
wc.nLeftMargin = ME_twips2pointsX(c, dxStartIndent + pFmt->dxOffset);
wc.nFirstMargin = ME_twips2pointsX(c, dxStartIndent);
if (pFmt->wNumbering)
{
wc.nParaNumOffset = wc.nFirstMargin;
dxStartIndent = max( ME_twips2pointsX(c, pFmt->wNumberingTab),
tp->member.para.para_num.width );
wc.nFirstMargin += dxStartIndent;
}
wc.nRightMargin = ME_twips2pointsX(c, pFmt->dxRightIndent);
if (wc.nFirstMargin < 0)
wc.nFirstMargin = 0;
if (wc.nLeftMargin < 0)
wc.nLeftMargin = 0;
}
if (c->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
{
wc.nFirstMargin += ME_twips2pointsX(c, pFmt->dxOffset * 2);
}
wc.nRow = 0;
wc.pt.y = 0;
if (pFmt->dwMask & PFM_SPACEBEFORE)
wc.pt.y += ME_twips2pointsY(c, pFmt->dySpaceBefore);
if (!(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE) &&
pFmt->dwMask & PFM_BORDER)
{
border = ME_GetParaBorderWidth(c, tp->member.para.fmt.wBorders);
if (pFmt->wBorders & 1) {
wc.nFirstMargin += border;
wc.nLeftMargin += border;
}
if (pFmt->wBorders & 2)
wc.nRightMargin -= border;
if (pFmt->wBorders & 4)
wc.pt.y += border;
}
linespace = ME_GetParaLineSpace(c, &tp->member.para);
ME_BeginRow(&wc);
for (p = tp->next; p!=tp->member.para.next_para; ) {
assert(p->type != diStartRow);
if (p->type == diRun) {
p = ME_WrapHandleRun(&wc, p);
}
else p = p->next;
if (wc.nRow && p == wc.pRowStart)
wc.pt.y += linespace;
}
ME_WrapEndParagraph(&wc, p);
if (!(pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE) &&
(pFmt->dwMask & PFM_BORDER) && (pFmt->wBorders & 8))
wc.pt.y += border;
if (tp->member.para.fmt.dwMask & PFM_SPACEAFTER)
wc.pt.y += ME_twips2pointsY(c, pFmt->dySpaceAfter);
tp->member.para.nFlags &= ~MEPF_REWRAP;
tp->member.para.nHeight = wc.pt.y;
tp->member.para.nRows = wc.nRow;
editor->total_rows += wc.nRow;
}
static void ME_MarkRepaintEnd(ME_DisplayItem *para,
ME_DisplayItem **repaint_start,
ME_DisplayItem **repaint_end)
{
if (!*repaint_start)
*repaint_start = para;
*repaint_end = para;
}
static void adjust_para_y(ME_DisplayItem *item, ME_Context *c, ME_DisplayItem *repaint_start, ME_DisplayItem *repaint_end)
{
if (item->member.para.nFlags & MEPF_ROWSTART)
{
ME_DisplayItem *cell = ME_FindItemFwd(item, diCell);
ME_DisplayItem *endRowPara;
int borderWidth = 0;
cell->member.cell.pt = c->pt;
/* Offset the text by the largest top border width. */
while (cell->member.cell.next_cell)
{
borderWidth = max(borderWidth, cell->member.cell.border.top.width);
cell = cell->member.cell.next_cell;
}
endRowPara = ME_FindItemFwd(cell, diParagraph);
assert(endRowPara->member.para.nFlags & MEPF_ROWEND);
if (borderWidth > 0)
{
borderWidth = max(ME_twips2pointsY(c, borderWidth), 1);
while (cell)
{
cell->member.cell.yTextOffset = borderWidth;
cell = cell->member.cell.prev_cell;
}
c->pt.y += borderWidth;
}
if (endRowPara->member.para.fmt.dxStartIndent > 0)
{
int dxStartIndent = endRowPara->member.para.fmt.dxStartIndent;
cell = ME_FindItemFwd(item, diCell);
cell->member.cell.pt.x += ME_twips2pointsX(c, dxStartIndent);
c->pt.x = cell->member.cell.pt.x;
}
}
else if (item->member.para.nFlags & MEPF_ROWEND)
{
/* Set all the cells to the height of the largest cell */
ME_DisplayItem *startRowPara;
int prevHeight, nHeight, bottomBorder = 0;
ME_DisplayItem *cell = ME_FindItemBack(item, diCell);
item->member.para.nWidth = cell->member.cell.pt.x + cell->member.cell.nWidth;
if (!(item->member.para.next_para->member.para.nFlags & MEPF_ROWSTART))
{
/* Last row, the bottom border is added to the height. */
cell = cell->member.cell.prev_cell;
while (cell)
{
bottomBorder = max(bottomBorder, cell->member.cell.border.bottom.width);
cell = cell->member.cell.prev_cell;
}
bottomBorder = ME_twips2pointsY(c, bottomBorder);
cell = ME_FindItemBack(item, diCell);
}
prevHeight = cell->member.cell.nHeight;
nHeight = cell->member.cell.prev_cell->member.cell.nHeight + bottomBorder;
cell->member.cell.nHeight = nHeight;
item->member.para.nHeight = nHeight;
cell = cell->member.cell.prev_cell;
cell->member.cell.nHeight = nHeight;
while (cell->member.cell.prev_cell)
{
cell = cell->member.cell.prev_cell;
cell->member.cell.nHeight = nHeight;
}
/* Also set the height of the start row paragraph */
startRowPara = ME_FindItemBack(cell, diParagraph);
startRowPara->member.para.nHeight = nHeight;
c->pt.x = startRowPara->member.para.pt.x;
c->pt.y = cell->member.cell.pt.y + nHeight;
if (prevHeight < nHeight)
{
/* The height of the cells has grown, so invalidate the bottom of
* the cells. */
ME_MarkRepaintEnd(item, &repaint_start, &repaint_end);
cell = ME_FindItemBack(item, diCell);
while (cell)
{
ME_MarkRepaintEnd(ME_FindItemBack(cell, diParagraph), &repaint_start, &repaint_end);
cell = cell->member.cell.prev_cell;
}
}
}
else if (item->member.para.pCell &&
item->member.para.pCell != item->member.para.next_para->member.para.pCell)
{
/* The next paragraph is in the next cell in the table row. */
ME_Cell *cell = &item->member.para.pCell->member.cell;
cell->nHeight = c->pt.y + item->member.para.nHeight - cell->pt.y;
/* Propagate the largest height to the end so that it can be easily
* sent back to all the cells at the end of the row. */
if (cell->prev_cell)
cell->nHeight = max(cell->nHeight, cell->prev_cell->member.cell.nHeight);
c->pt.x = cell->pt.x + cell->nWidth;
c->pt.y = cell->pt.y;
cell->next_cell->member.cell.pt = c->pt;
if (!(item->member.para.next_para->member.para.nFlags & MEPF_ROWEND))
c->pt.y += cell->yTextOffset;
}
else
{
if (item->member.para.pCell)
{
/* Next paragraph in the same cell. */
c->pt.x = item->member.para.pCell->member.cell.pt.x;
}
else
/* Normal paragraph */
c->pt.x = 0;
c->pt.y += item->member.para.nHeight;
}
}
BOOL ME_WrapMarkedParagraphs(ME_TextEditor *editor)
{
ME_DisplayItem *item;
ME_Context c;
int totalWidth = editor->nTotalWidth, diff = 0, prev_width;
ME_DisplayItem *repaint_start = NULL, *repaint_end = NULL;
ME_Paragraph *para;
if (!editor->first_marked_para)
return FALSE;
ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
item = editor->first_marked_para;
c.pt = item->member.para.pt;
while (item != editor->pBuffer->pLast)
{
assert(item->type == diParagraph);
prev_width = item->member.para.nWidth;
ME_WrapTextParagraph(editor, &c, item);
if (prev_width == totalWidth && item->member.para.nWidth < totalWidth)
totalWidth = get_total_width(editor);
else
totalWidth = max(totalWidth, item->member.para.nWidth);
if (!item->member.para.nCharOfs)
ME_MarkRepaintEnd(item->member.para.prev_para, &repaint_start, &repaint_end);
ME_MarkRepaintEnd(item, &repaint_start, &repaint_end);
adjust_para_y(item, &c, repaint_start, repaint_end);
if (item->member.para.next_para)
{
diff = c.pt.y - item->member.para.next_para->member.para.pt.y;
if (diff)
{
para = &item->member.para;
while (para->next_para && para != &item->member.para.next_marked->member.para &&
para != &editor->pBuffer->pLast->member.para)
{
ME_MarkRepaintEnd(para->next_para, &repaint_start, &repaint_end);
para->next_para->member.para.pt.y = c.pt.y;
adjust_para_y(para->next_para, &c, repaint_start, repaint_end);
para = &para->next_para->member.para;
}
}
}
if (item->member.para.next_marked)
{
ME_DisplayItem *rem = item;
item = item->member.para.next_marked;
remove_marked_para(editor, rem);
}
else
{
remove_marked_para(editor, item);
item = editor->pBuffer->pLast;
}
c.pt.y = item->member.para.pt.y;
}
editor->sizeWindow.cx = c.rcView.right-c.rcView.left;
editor->sizeWindow.cy = c.rcView.bottom-c.rcView.top;
editor->nTotalLength = c.pt.y;
editor->nTotalWidth = totalWidth;
editor->pBuffer->pLast->member.para.pt.x = 0;
editor->pBuffer->pLast->member.para.pt.y = c.pt.y;
ME_DestroyContext(&c);
if (repaint_start || editor->nTotalLength < editor->nLastTotalLength)
ME_InvalidateParagraphRange(editor, repaint_start, repaint_end);
return !!repaint_start;
}
void ME_InvalidateParagraphRange(ME_TextEditor *editor,
ME_DisplayItem *start_para,
ME_DisplayItem *last_para)
{
ME_Context c;
RECT rc;
int ofs;
ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
rc = c.rcView;
ofs = editor->vert_si.nPos;
if (start_para) {
start_para = ME_GetOuterParagraph(start_para);
last_para = ME_GetOuterParagraph(last_para);
rc.top = c.rcView.top + start_para->member.para.pt.y - ofs;
} else {
rc.top = c.rcView.top + editor->nTotalLength - ofs;
}
if (editor->nTotalLength < editor->nLastTotalLength)
rc.bottom = c.rcView.top + editor->nLastTotalLength - ofs;
else
rc.bottom = c.rcView.top + last_para->member.para.pt.y + last_para->member.para.nHeight - ofs;
ITextHost_TxInvalidateRect(editor->texthost, &rc, TRUE);
ME_DestroyContext(&c);
}
void
ME_SendRequestResize(ME_TextEditor *editor, BOOL force)
{
if (editor->nEventMask & ENM_REQUESTRESIZE)
{
RECT rc;
ITextHost_TxGetClientRect(editor->texthost, &rc);
if (force || rc.bottom != editor->nTotalLength)
{
REQRESIZE info;
info.nmhdr.hwndFrom = NULL;
info.nmhdr.idFrom = 0;
info.nmhdr.code = EN_REQUESTRESIZE;
info.rc = rc;
info.rc.right = editor->nTotalWidth;
info.rc.bottom = editor->nTotalLength;
editor->nEventMask &= ~ENM_REQUESTRESIZE;
ITextHost_TxNotify(editor->texthost, info.nmhdr.code, &info);
editor->nEventMask |= ENM_REQUESTRESIZE;
}
}
}
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