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Sweden-Number/dlls/riched20/run.c

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/*
* RichEdit - operations on runs (diRun, rectangular pieces of paragraphs).
* Splitting/joining runs. Adjusting offsets after deleting/adding content.
* Character/pixel conversions.
*
* Copyright 2004 by Krzysztof Foltman
* Copyright 2006 by Phil Krylov
*
* 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);
WINE_DECLARE_DEBUG_CHANNEL(richedit_check);
WINE_DECLARE_DEBUG_CHANNEL(richedit_lists);
BOOL cursor_next_run( ME_Cursor *cursor, BOOL all_para )
{
ME_DisplayItem *p = run_get_di( cursor->run )->next;
while (p->type != diTextEnd)
{
if (p->type == diParagraph && !all_para) return FALSE;
else if (p->type == diRun)
{
cursor->run = &p->member.run;
cursor->para = cursor->run->para;
cursor->nOffset = 0;
return TRUE;
}
p = p->next;
}
return FALSE;
}
BOOL cursor_prev_run( ME_Cursor *cursor, BOOL all_para )
{
ME_DisplayItem *p = run_get_di( cursor->run )->prev;
while (p->type != diTextStart)
{
if (p->type == diParagraph && !all_para) return FALSE;
else if (p->type == diRun)
{
cursor->run = &p->member.run;
cursor->para = cursor->run->para;
cursor->nOffset = 0;
return TRUE;
}
p = p->prev;
}
return FALSE;
}
ME_Run *run_next( ME_Run *run )
{
ME_Cursor cursor;
cursor.run = run;
cursor.para = run->para;
cursor.nOffset = 0;
if (cursor_next_run( &cursor, FALSE ))
return cursor.run;
return NULL;
}
ME_Run *run_prev( ME_Run *run )
{
ME_Cursor cursor;
cursor.run = run;
cursor.para = run->para;
cursor.nOffset = 0;
if (cursor_prev_run( &cursor, FALSE ))
return cursor.run;
return NULL;
}
ME_Run *run_next_all_paras( ME_Run *run )
{
ME_Cursor cursor;
cursor.run = run;
cursor.para = run->para;
cursor.nOffset = 0;
if (cursor_next_run( &cursor, TRUE ))
return cursor.run;
return NULL;
}
ME_Run *run_prev_all_paras( ME_Run *run )
{
ME_Cursor cursor;
cursor.run = run;
cursor.para = run->para;
cursor.nOffset = 0;
if (cursor_prev_run( &cursor, TRUE ))
return cursor.run;
return NULL;
}
/******************************************************************************
* ME_CanJoinRuns
*
* Returns TRUE if two runs can be safely merged into one, FALSE otherwise.
*/
BOOL ME_CanJoinRuns(const ME_Run *run1, const ME_Run *run2)
{
if ((run1->nFlags | run2->nFlags) & MERF_NOJOIN)
return FALSE;
if (run1->style != run2->style)
return FALSE;
if ((run1->nFlags & MERF_STYLEFLAGS) != (run2->nFlags & MERF_STYLEFLAGS))
return FALSE;
return TRUE;
}
/******************************************************************************
* editor_propagate_char_ofs
*
* Shifts (increases or decreases) character offset (relative to beginning of
* the document) of the part of the text starting from given place.
* Call with only one of para or run non-NULL.
*/
void editor_propagate_char_ofs( ME_Paragraph *para, ME_Run *run, int shift )
{
assert( !para ^ !run );
if (run)
{
para = para_next( run->para );
do
{
run->nCharOfs += shift;
run = run_next( run );
} while (run);
}
do
{
para->nCharOfs += shift;
para = para_next( para );
} while (para);
}
/******************************************************************************
* ME_CheckCharOffsets
*
* Checks if editor lists' validity and optionally dumps the document structure
*/
void ME_CheckCharOffsets(ME_TextEditor *editor)
{
ME_DisplayItem *p = editor->pBuffer->pFirst;
int ofs = 0, ofsp = 0;
if (!TRACE_ON(richedit_check))
return;
TRACE_(richedit_check)("Checking begin\n");
if(TRACE_ON(richedit_lists))
{
TRACE_(richedit_lists)("---\n");
ME_DumpDocument(editor->pBuffer);
}
do {
p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
switch(p->type) {
case diTextEnd:
TRACE_(richedit_check)("tend, real ofsp = %d, counted = %d\n", p->member.para.nCharOfs, ofsp+ofs);
assert(ofsp+ofs == p->member.para.nCharOfs);
TRACE_(richedit_check)("Checking finished\n");
return;
case diParagraph:
TRACE_(richedit_check)("para, real ofsp = %d, counted = %d\n", p->member.para.nCharOfs, ofsp+ofs);
assert(ofsp+ofs == p->member.para.nCharOfs);
ofsp = p->member.para.nCharOfs;
ofs = 0;
break;
case diRun:
TRACE_(richedit_check)("run, real ofs = %d (+ofsp = %d), counted = %d, len = %d, txt = %s, flags=%08x, fx&mask = %08x\n",
p->member.run.nCharOfs, p->member.run.nCharOfs+ofsp, ofsp+ofs,
p->member.run.len, debugstr_run( &p->member.run ),
p->member.run.nFlags,
p->member.run.style->fmt.dwMask & p->member.run.style->fmt.dwEffects);
assert(ofs == p->member.run.nCharOfs);
assert(p->member.run.len);
ofs += p->member.run.len;
break;
case diCell:
TRACE_(richedit_check)("cell\n");
break;
default:
assert(0);
}
} while(1);
TRACE_(richedit_check)("Checking finished\n");
}
/******************************************************************************
* run_char_ofs
*
* Converts a character position relative to the start of the run to a
* character position relative to the start of the document.
*/
int run_char_ofs( ME_Run *run, int ofs )
{
return run->para->nCharOfs + run->nCharOfs + ofs;
}
/******************************************************************************
* cursor_from_char_ofs
*
* Converts a character offset (relative to the start of the document) to
* a cursor structure (which contains a run and a position relative to that
* run).
*/
void cursor_from_char_ofs( ME_TextEditor *editor, int char_ofs, ME_Cursor *cursor )
{
ME_Paragraph *para;
ME_Run *run;
char_ofs = min( max( char_ofs, 0 ), ME_GetTextLength( editor ) );
/* Find the paragraph at the offset. */
for (para = editor_first_para( editor );
para_next( para )->nCharOfs <= char_ofs;
para = para_next( para ))
;
char_ofs -= para->nCharOfs;
/* Find the run at the offset. */
for (run = para_first_run( para );
run_next( run ) && run_next( run )->nCharOfs <= char_ofs;
run = run_next( run ))
;
char_ofs -= run->nCharOfs;
cursor->para = para;
cursor->run = run;
cursor->nOffset = char_ofs;
}
/******************************************************************************
* run_join
*
* Merges two adjacent runs, the one given as a parameter and the next one.
*/
void run_join( ME_TextEditor *editor, ME_Run *run )
{
ME_Run *next = run_next( run );
int i;
assert( run );
assert( run->nCharOfs != -1 );
para_mark_rewrap( editor, run->para );
/* Update all cursors so that they don't contain the soon deleted run */
for (i = 0; i < editor->nCursors; i++)
{
if (editor->pCursors[i].run == next)
{
editor->pCursors[i].run = run;
editor->pCursors[i].nOffset += run->len;
}
}
run->len += next->len;
ME_Remove( run_get_di( next ) );
ME_DestroyDisplayItem( run_get_di( next ) );
ME_UpdateRunFlags( editor, run );
ME_CheckCharOffsets( editor );
}
/******************************************************************************
* run_split
*
* Does the most basic job of splitting a run into two - it does not
* update the positions and extents.
*/
ME_Run *run_split( ME_TextEditor *editor, ME_Cursor *cursor )
{
ME_Run *run = cursor->run, *new_run;
int i;
int nOffset = cursor->nOffset;
assert( !(run->nFlags & MERF_NONTEXT) );
new_run = run_create( run->style, run->nFlags & MERF_SPLITMASK );
new_run->nCharOfs = run->nCharOfs + nOffset;
new_run->len = run->len - nOffset;
new_run->para = run->para;
run->len = nOffset;
cursor->run = new_run;
cursor->nOffset = 0;
ME_InsertBefore( run_get_di( run )->next, run_get_di( new_run ) );
ME_UpdateRunFlags( editor, run );
ME_UpdateRunFlags( editor, new_run );
for (i = 0; i < editor->nCursors; i++)
{
if (editor->pCursors[i].run == run &&
editor->pCursors[i].nOffset >= nOffset)
{
editor->pCursors[i].run = new_run;
editor->pCursors[i].nOffset -= nOffset;
}
}
para_mark_rewrap( editor, run->para );
return run;
}
/******************************************************************************
* run_create
*
* A helper function to create run structures quickly.
*/
ME_Run *run_create( ME_Style *s, int flags )
{
ME_DisplayItem *item = ME_MakeDI( diRun );
ME_Run *run = &item->member.run;
if (!item) return NULL;
ME_AddRefStyle( s );
run->style = s;
run->reobj = NULL;
run->nFlags = flags;
run->nCharOfs = -1;
run->len = 0;
run->para = NULL;
run->num_glyphs = 0;
run->max_glyphs = 0;
run->glyphs = NULL;
run->vis_attrs = NULL;
run->advances = NULL;
run->offsets = NULL;
run->max_clusters = 0;
run->clusters = NULL;
return run;
}
/******************************************************************************
* run_insert
*
* Inserts a new run with given style, flags and content at a given position,
* which is passed as a cursor structure (which consists of a run and
* a run-relative character offset).
*/
ME_Run *run_insert( ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
const WCHAR *str, int len, int flags )
{
ME_Run *insert_before = cursor->run, *run, *prev;
if (cursor->nOffset)
{
if (cursor->nOffset == insert_before->len)
{
insert_before = run_next_all_paras( insert_before );
if (!insert_before) insert_before = cursor->run; /* Always insert before the final eop run */
}
else
{
run_split( editor, cursor );
insert_before = cursor->run;
}
}
add_undo_delete_run( editor, insert_before->para->nCharOfs + insert_before->nCharOfs, len );
run = run_create( style, flags );
run->nCharOfs = insert_before->nCharOfs;
run->len = len;
run->para = insert_before->para;
ME_InsertString( run->para->text, run->nCharOfs, str, len );
ME_InsertBefore( run_get_di( insert_before ), run_get_di( run ) );
TRACE("Shift length:%d\n", len);
editor_propagate_char_ofs( NULL, insert_before, len );
para_mark_rewrap( editor, insert_before->para );
/* Move any cursors that were at the end of the previous run to the end of the inserted run */
prev = run_prev_all_paras( run );
if (prev)
{
int i;
for (i = 0; i < editor->nCursors; i++)
{
if (editor->pCursors[i].run == prev &&
editor->pCursors[i].nOffset == prev->len)
{
editor->pCursors[i].run = run;
editor->pCursors[i].nOffset = len;
}
}
}
return run;
}
static BOOL run_is_splittable( const ME_Run *run )
{
WCHAR *str = get_text( run, 0 ), *p;
int i;
BOOL found_ink = FALSE;
for (i = 0, p = str; i < run->len; i++, p++)
{
if (ME_IsWSpace( *p ))
{
if (found_ink) return TRUE;
}
else
found_ink = TRUE;
}
return FALSE;
}
static BOOL run_is_entirely_ws( const ME_Run *run )
{
WCHAR *str = get_text( run, 0 ), *p;
int i;
for (i = 0, p = str; i < run->len; i++, p++)
if (!ME_IsWSpace( *p )) return FALSE;
return TRUE;
}
/******************************************************************************
* ME_UpdateRunFlags
*
* Determine some of run attributes given its content (style, text content).
* Some flags cannot be determined by this function (MERF_GRAPHICS,
* MERF_ENDPARA)
*/
void ME_UpdateRunFlags(ME_TextEditor *editor, ME_Run *run)
{
assert(run->nCharOfs >= 0);
if (RUN_IS_HIDDEN(run) || run->nFlags & MERF_TABLESTART)
run->nFlags |= MERF_HIDDEN;
else
run->nFlags &= ~MERF_HIDDEN;
if (run_is_splittable( run ))
run->nFlags |= MERF_SPLITTABLE;
else
run->nFlags &= ~MERF_SPLITTABLE;
if (!(run->nFlags & MERF_NOTEXT))
{
if (run_is_entirely_ws( run ))
run->nFlags |= MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE;
else
{
run->nFlags &= ~MERF_WHITESPACE;
if (ME_IsWSpace( *get_text( run, 0 ) ))
run->nFlags |= MERF_STARTWHITE;
else
run->nFlags &= ~MERF_STARTWHITE;
if (ME_IsWSpace( *get_text( run, run->len - 1 ) ))
run->nFlags |= MERF_ENDWHITE;
else
run->nFlags &= ~MERF_ENDWHITE;
}
}
else
run->nFlags &= ~(MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE);
}
/******************************************************************************
* ME_CharFromPointContext
*
* Returns a character position inside the run given a run-relative
* pixel horizontal position.
*
* If closest is FALSE return the actual character
* If closest is TRUE will round to the closest leading edge.
* ie. if the second character is at pixel position 8 and third at 16 then for:
* closest = FALSE cx = 0..7 return 0, cx = 8..15 return 1
* closest = TRUE cx = 0..3 return 0, cx = 4..11 return 1.
*/
int ME_CharFromPointContext(ME_Context *c, int cx, ME_Run *run, BOOL closest, BOOL visual_order)
{
ME_String *mask_text = NULL;
WCHAR *str;
int fit = 0;
SIZE sz, sz2, sz3;
if (!run->len || cx <= 0)
return 0;
if (run->nFlags & (MERF_TAB | MERF_ENDCELL))
{
if (!closest || cx < run->nWidth / 2) return 0;
return 1;
}
if (run->nFlags & MERF_GRAPHICS)
{
SIZE sz;
ME_GetOLEObjectSize(c, run, &sz);
if (!closest || cx < sz.cx / 2) return 0;
return 1;
}
if (run->para->nFlags & MEPF_COMPLEX)
{
int cp, trailing;
if (visual_order && run->script_analysis.fRTL) cx = run->nWidth - cx - 1;
ScriptXtoCP( cx, run->len, run->num_glyphs, run->clusters, run->vis_attrs, run->advances, &run->script_analysis,
&cp, &trailing );
TRACE("x %d cp %d trailing %d (run width %d) rtl %d log order %d\n", cx, cp, trailing, run->nWidth,
run->script_analysis.fRTL, run->script_analysis.fLogicalOrder);
return closest ? cp + trailing : cp;
}
if (c->editor->password_char)
{
mask_text = ME_MakeStringR( c->editor->password_char, run->len );
str = mask_text->szData;
}
else
str = get_text( run, 0 );
select_style(c, run->style);
GetTextExtentExPointW(c->hDC, str, run->len,
cx, &fit, NULL, &sz);
if (closest && fit != run->len)
{
GetTextExtentPoint32W(c->hDC, str, fit, &sz2);
GetTextExtentPoint32W(c->hDC, str, fit + 1, &sz3);
if (cx >= (sz2.cx+sz3.cx)/2)
fit = fit + 1;
}
ME_DestroyString( mask_text );
return fit;
}
int ME_CharFromPoint(ME_TextEditor *editor, int cx, ME_Run *run, BOOL closest, BOOL visual_order)
{
ME_Context c;
int ret;
ME_InitContext( &c, editor, ITextHost_TxGetDC( editor->texthost ) );
ret = ME_CharFromPointContext( &c, cx, run, closest, visual_order );
ME_DestroyContext(&c);
return ret;
}
/******************************************************************************
* ME_GetTextExtent
*
* Finds a width and a height of the text using a specified style
*/
static void ME_GetTextExtent(ME_Context *c, LPCWSTR szText, int nChars, ME_Style *s, SIZE *size)
{
if (c->hDC)
{
select_style( c, s );
GetTextExtentPoint32W( c->hDC, szText, nChars, size );
}
else
{
size->cx = 0;
size->cy = 0;
}
}
/******************************************************************************
* ME_PointFromCharContext
*
* Returns a run-relative pixel position given a run-relative character
* position (character offset)
*/
int ME_PointFromCharContext(ME_Context *c, ME_Run *pRun, int nOffset, BOOL visual_order)
{
SIZE size;
ME_String *mask_text = NULL;
WCHAR *str;
if (pRun->nFlags & MERF_GRAPHICS)
{
if (nOffset)
ME_GetOLEObjectSize(c, pRun, &size);
return nOffset != 0;
} else if (pRun->nFlags & MERF_ENDPARA) {
nOffset = 0;
}
if (pRun->para->nFlags & MEPF_COMPLEX)
{
int x;
ScriptCPtoX( nOffset, FALSE, pRun->len, pRun->num_glyphs, pRun->clusters,
pRun->vis_attrs, pRun->advances, &pRun->script_analysis, &x );
if (visual_order && pRun->script_analysis.fRTL) x = pRun->nWidth - x - 1;
return x;
}
if (c->editor->password_char)
{
mask_text = ME_MakeStringR( c->editor->password_char, pRun->len );
str = mask_text->szData;
}
else
str = get_text( pRun, 0 );
ME_GetTextExtent(c, str, nOffset, pRun->style, &size);
ME_DestroyString( mask_text );
return size.cx;
}
/******************************************************************************
* ME_PointFromChar
*
* Calls ME_PointFromCharContext after first creating a context.
*/
int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset, BOOL visual_order)
{
ME_Context c;
int ret;
ME_InitContext(&c, editor, ITextHost_TxGetDC(editor->texthost));
ret = ME_PointFromCharContext( &c, pRun, nOffset, visual_order );
ME_DestroyContext(&c);
return ret;
}
/******************************************************************************
* ME_GetRunSizeCommon
*
* Finds width, height, ascent and descent of a run, up to given character
* (nLen).
*/
SIZE ME_GetRunSizeCommon(ME_Context *c, const ME_Paragraph *para, ME_Run *run, int nLen,
int startx, int *pAscent, int *pDescent)
{
SIZE size;
nLen = min( nLen, run->len );
if (run->nFlags & MERF_ENDPARA)
{
nLen = min( nLen, 1 );
ME_GetTextExtent( c, L" ", nLen, run->style, &size );
}
else if (para->nFlags & MEPF_COMPLEX)
{
size.cx = run->nWidth;
}
else if (c->editor->password_char)
{
ME_String *szMasked = ME_MakeStringR( c->editor->password_char, nLen );
ME_GetTextExtent(c, szMasked->szData, nLen,run->style, &size);
ME_DestroyString(szMasked);
}
else
{
ME_GetTextExtent(c, get_text( run, 0 ), nLen, run->style, &size);
}
*pAscent = run->style->tm.tmAscent;
*pDescent = run->style->tm.tmDescent;
size.cy = *pAscent + *pDescent;
if (run->nFlags & MERF_TAB)
{
int pos = 0, i = 0, ppos, shift = 0;
const PARAFORMAT2 *pFmt = &para->fmt;
if (c->editor->bEmulateVersion10 && /* v1.0 - 3.0 */
pFmt->dwMask & PFM_TABLE && pFmt->wEffects & PFE_TABLE)
/* The horizontal gap shifts the tab positions to leave the gap. */
shift = pFmt->dxOffset * 2;
do {
if (i < pFmt->cTabCount)
{
/* Only one side of the horizontal gap is needed at the end of
* the table row. */
if (i == pFmt->cTabCount -1)
shift = shift >> 1;
pos = shift + (pFmt->rgxTabs[i]&0x00FFFFFF);
i++;
}
else
{
pos += lDefaultTab - (pos % lDefaultTab);
}
ppos = ME_twips2pointsX(c, pos);
if (ppos > startx + run->pt.x) {
size.cx = ppos - startx - run->pt.x;
break;
}
} while(1);
size.cy = *pAscent + *pDescent;
return size;
}
if (run->nFlags & MERF_GRAPHICS)
{
ME_GetOLEObjectSize(c, run, &size);
if (size.cy > *pAscent)
*pAscent = size.cy;
/* descent is unchanged */
return size;
}
return size;
}
/******************************************************************************
* ME_SetSelectionCharFormat
*
* Applies a style change, either to a current selection, or to insert cursor
* (ie. the style next typed characters will use).
*/
void ME_SetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
{
if (!ME_IsSelection(editor))
{
ME_Style *s;
if (!editor->pBuffer->pCharStyle)
editor->pBuffer->pCharStyle = style_get_insert_style( editor, editor->pCursors );
s = ME_ApplyStyle(editor, editor->pBuffer->pCharStyle, pFmt);
ME_ReleaseStyle(editor->pBuffer->pCharStyle);
editor->pBuffer->pCharStyle = s;
} else {
ME_Cursor *from, *to;
ME_GetSelection(editor, &from, &to);
ME_SetCharFormat(editor, from, to, pFmt);
}
}
/******************************************************************************
* ME_SetCharFormat
*
* Applies a style change to the specified part of the text
*
* The start and end cursors specify the part of the text. These cursors will
* be updated to stay valid, but this function may invalidate other
* non-selection cursors. The end cursor may be NULL to specify all the text
* following the start cursor.
*
* If no text is selected, then nothing is done.
*/
void ME_SetCharFormat( ME_TextEditor *editor, ME_Cursor *start, ME_Cursor *end, CHARFORMAT2W *fmt )
{
ME_Run *run, *start_run = start->run, *end_run = NULL;
if (end && start->run == end->run && start->nOffset == end->nOffset)
return;
if (start->nOffset == start->run->len)
start_run = run_next_all_paras( start->run );
else if (start->nOffset)
{
/* run_split() may or may not update the cursors, depending on whether they
* are selection cursors, but we need to make sure they are valid. */
int split_offset = start->nOffset;
ME_Run *split_run = run_split( editor, start );
start_run = start->run;
if (end && end->run == split_run)
{
end->run = start->run;
end->nOffset -= split_offset;
}
}
if (end)
{
if (end->nOffset == end->run->len)
end_run = run_next_all_paras( end->run );
else
{
if (end->nOffset) run_split( editor, end );
end_run = end->run;
}
}
for (run = start_run; run != end_run; run = run_next_all_paras( run ))
{
ME_Style *new_style = ME_ApplyStyle( editor, run->style, fmt );
ME_Paragraph *para = run->para;
add_undo_set_char_fmt( editor, para->nCharOfs + run->nCharOfs,
run->len, &run->style->fmt );
ME_ReleaseStyle( run->style );
run->style = new_style;
/* The para numbering style depends on the eop style */
if ((run->nFlags & MERF_ENDPARA) && para->para_num.style)
{
ME_ReleaseStyle(para->para_num.style);
para->para_num.style = NULL;
}
para_mark_rewrap( editor, para );
}
}
static void run_copy_char_fmt( ME_Run *run, CHARFORMAT2W *fmt )
{
ME_CopyCharFormat( fmt, &run->style->fmt );
}
/******************************************************************************
* ME_GetDefaultCharFormat
*
* Retrieves the current default character style (the one applied where no
* other style was applied) .
*/
void ME_GetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
{
ME_CopyCharFormat(pFmt, &editor->pBuffer->pDefaultStyle->fmt);
}
/******************************************************************************
* ME_GetSelectionCharFormat
*
* If selection exists, it returns all style elements that are set consistently
* in the whole selection. If not, it just returns the current style.
*/
void ME_GetSelectionCharFormat(ME_TextEditor *editor, CHARFORMAT2W *pFmt)
{
ME_Cursor *from, *to;
if (!ME_IsSelection(editor) && editor->pBuffer->pCharStyle)
{
ME_CopyCharFormat(pFmt, &editor->pBuffer->pCharStyle->fmt);
return;
}
ME_GetSelection(editor, &from, &to);
ME_GetCharFormat(editor, from, to, pFmt);
}
/******************************************************************************
* ME_GetCharFormat
*
* Returns the style consisting of those attributes which are consistently set
* in the whole character range.
*/
void ME_GetCharFormat( ME_TextEditor *editor, const ME_Cursor *from,
const ME_Cursor *to, CHARFORMAT2W *fmt )
{
ME_Run *run, *run_end, *prev_run;
CHARFORMAT2W tmp;
run = from->run;
/* special case - if selection is empty, take previous char's formatting */
if (from->run == to->run && from->nOffset == to->nOffset)
{
if (!from->nOffset && (prev_run = run_prev( run ))) run = prev_run;
run_copy_char_fmt( run, fmt );
return;
}
run_end = to->run;
if (!to->nOffset) run_end = run_prev_all_paras( run_end );
run_copy_char_fmt( run, fmt );
if (run == run_end) return;
do {
/* FIXME add more style feature comparisons */
DWORD dwAttribs = CFM_SIZE | CFM_FACE | CFM_COLOR | CFM_UNDERLINETYPE;
DWORD dwEffects = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE | CFM_STRIKEOUT | CFM_PROTECTED | CFM_LINK | CFM_SUPERSCRIPT;
run = run_next_all_paras( run );
memset( &tmp, 0, sizeof(tmp) );
tmp.cbSize = sizeof(tmp);
run_copy_char_fmt( run, &tmp );
assert((tmp.dwMask & dwAttribs) == dwAttribs);
/* reset flags that differ */
if (fmt->yHeight != tmp.yHeight) fmt->dwMask &= ~CFM_SIZE;
if (fmt->dwMask & CFM_FACE)
{
if (!(tmp.dwMask & CFM_FACE))
fmt->dwMask &= ~CFM_FACE;
else if (wcscmp( fmt->szFaceName, tmp.szFaceName ) ||
fmt->bPitchAndFamily != tmp.bPitchAndFamily)
fmt->dwMask &= ~CFM_FACE;
}
if (fmt->yHeight != tmp.yHeight) fmt->dwMask &= ~CFM_SIZE;
if (fmt->bUnderlineType != tmp.bUnderlineType) fmt->dwMask &= ~CFM_UNDERLINETYPE;
if (fmt->dwMask & CFM_COLOR)
{
if (!((fmt->dwEffects&CFE_AUTOCOLOR) & (tmp.dwEffects&CFE_AUTOCOLOR)))
{
if (fmt->crTextColor != tmp.crTextColor)
fmt->dwMask &= ~CFM_COLOR;
}
}
fmt->dwMask &= ~((fmt->dwEffects ^ tmp.dwEffects) & dwEffects);
fmt->dwEffects = tmp.dwEffects;
} while(run != run_end);
}
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