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wine/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);
/******************************************************************************
* ME_CanJoinRuns
*
* Returns 1 if two runs can be safely merged into one, 0 otherwise.
*/
int ME_CanJoinRuns(const ME_Run *run1, const ME_Run *run2)
{
if ((run1->nFlags | run2->nFlags) & MERF_NOJOIN)
return 0;
if (run1->style != run2->style)
return 0;
if ((run1->nFlags & MERF_STYLEFLAGS) != (run2->nFlags & MERF_STYLEFLAGS))
return 0;
return 1;
}
void ME_SkipAndPropagateCharOffset(ME_DisplayItem *p, int shift)
{
p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
assert(p);
ME_PropagateCharOffset(p, shift);
}
/******************************************************************************
* ME_PropagateCharOffsets
*
* Shifts (increases or decreases) character offset (relative to beginning of
* the document) of the part of the text starting from given place.
*/
void ME_PropagateCharOffset(ME_DisplayItem *p, int shift)
{
/* Runs in one paragraph contain character offset relative to their owning
* paragraph. If we start the shifting from the run, we need to shift
* all the relative offsets until the end of the paragraph
*/
if (p->type == diRun) /* propagate in all runs in this para */
{
TRACE("PropagateCharOffset(%s, %d)\n", debugstr_run( &p->member.run ), shift);
do {
p->member.run.nCharOfs += shift;
assert(p->member.run.nCharOfs >= 0);
p = ME_FindItemFwd(p, diRunOrParagraphOrEnd);
} while(p->type == diRun);
}
/* Runs in next paragraphs don't need their offsets updated, because they,
* again, those offsets are relative to their respective paragraphs.
* Instead of that, we're updating paragraphs' character offsets.
*/
if (p->type == diParagraph) /* propagate in all next paras */
{
do {
p->member.para.nCharOfs += shift;
assert(p->member.para.nCharOfs >= 0);
p = p->member.para.next_para;
} while(p->type == diParagraph);
}
/* diTextEnd also has character offset in it, which makes finding text length
* easier. But it needs to be up to date first.
*/
if (p->type == diTextEnd)
{
p->member.para.nCharOfs += shift;
assert(p->member.para.nCharOfs >= 0);
}
}
/******************************************************************************
* 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_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);
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);
}
/******************************************************************************
* ME_CharOfsFromRunOfs
*
* Converts a character position relative to the start of the run, to a
* character position relative to the start of the document.
* Kind of a "local to global" offset conversion.
*/
int ME_CharOfsFromRunOfs(ME_TextEditor *editor, const ME_DisplayItem *pPara,
const ME_DisplayItem *pRun, int nOfs)
{
assert(pRun && pRun->type == diRun);
assert(pPara && pPara->type == diParagraph);
return pPara->member.para.nCharOfs + pRun->member.run.nCharOfs + nOfs;
}
/******************************************************************************
* ME_CursorFromCharOfs
*
* 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 ME_CursorFromCharOfs(ME_TextEditor *editor, int nCharOfs, ME_Cursor *pCursor)
{
ME_RunOfsFromCharOfs(editor, nCharOfs, &pCursor->pPara,
&pCursor->pRun, &pCursor->nOffset);
}
/******************************************************************************
* ME_RunOfsFromCharOfs
*
* Find a run and relative character offset given an absolute character offset
* (absolute offset being an offset relative to the start of the document).
* Kind of a "global to local" offset conversion.
*/
void ME_RunOfsFromCharOfs(ME_TextEditor *editor,
int nCharOfs,
ME_DisplayItem **ppPara,
ME_DisplayItem **ppRun,
int *pOfs)
{
ME_DisplayItem *item, *next_item;
nCharOfs = max(nCharOfs, 0);
nCharOfs = min(nCharOfs, ME_GetTextLength(editor));
/* Find the paragraph at the offset. */
next_item = editor->pBuffer->pFirst->member.para.next_para;
do {
item = next_item;
next_item = item->member.para.next_para;
} while (next_item->member.para.nCharOfs <= nCharOfs);
assert(item->type == diParagraph);
nCharOfs -= item->member.para.nCharOfs;
if (ppPara) *ppPara = item;
/* Find the run at the offset. */
next_item = ME_FindItemFwd(item, diRun);
do {
item = next_item;
next_item = ME_FindItemFwd(item, diRunOrParagraphOrEnd);
} while (next_item->type == diRun &&
next_item->member.run.nCharOfs <= nCharOfs);
assert(item->type == diRun);
nCharOfs -= item->member.run.nCharOfs;
if (ppRun) *ppRun = item;
if (pOfs) *pOfs = nCharOfs;
}
/******************************************************************************
* ME_JoinRuns
*
* Merges two adjacent runs, the one given as a parameter and the next one.
*/
void ME_JoinRuns(ME_TextEditor *editor, ME_DisplayItem *p)
{
ME_DisplayItem *pNext = p->next;
int i;
assert(p->type == diRun && pNext->type == diRun);
assert(p->member.run.nCharOfs != -1);
ME_GetParagraph(p)->member.para.nFlags |= MEPF_REWRAP;
/* Update all cursors so that they don't contain the soon deleted run */
for (i=0; i<editor->nCursors; i++) {
if (editor->pCursors[i].pRun == pNext) {
editor->pCursors[i].pRun = p;
editor->pCursors[i].nOffset += p->member.run.len;
}
}
p->member.run.len += pNext->member.run.len;
ME_Remove(pNext);
ME_DestroyDisplayItem(pNext);
ME_UpdateRunFlags(editor, &p->member.run);
if(TRACE_ON(richedit))
{
TRACE("Before check after join\n");
ME_CheckCharOffsets(editor);
TRACE("After check after join\n");
}
}
/******************************************************************************
* ME_SplitRunSimple
*
* Does the most basic job of splitting a run into two - it does not
* update the positions and extents.
*/
ME_DisplayItem *ME_SplitRunSimple(ME_TextEditor *editor, ME_Cursor *cursor)
{
ME_DisplayItem *run = cursor->pRun;
ME_DisplayItem *new_run;
int i;
int nOffset = cursor->nOffset;
assert(!(run->member.run.nFlags & MERF_NONTEXT));
new_run = ME_MakeRun(run->member.run.style,
run->member.run.nFlags & MERF_SPLITMASK);
new_run->member.run.nCharOfs = run->member.run.nCharOfs + nOffset;
new_run->member.run.len = run->member.run.len - nOffset;
new_run->member.run.para = run->member.run.para;
run->member.run.len = nOffset;
cursor->pRun = new_run;
cursor->nOffset = 0;
ME_InsertBefore(run->next, new_run);
ME_UpdateRunFlags(editor, &run->member.run);
ME_UpdateRunFlags(editor, &new_run->member.run);
for (i = 0; i < editor->nCursors; i++) {
if (editor->pCursors[i].pRun == run &&
editor->pCursors[i].nOffset >= nOffset) {
editor->pCursors[i].pRun = new_run;
editor->pCursors[i].nOffset -= nOffset;
}
}
cursor->pPara->member.para.nFlags |= MEPF_REWRAP;
return run;
}
/******************************************************************************
* ME_MakeRun
*
* A helper function to create run structures quickly.
*/
ME_DisplayItem *ME_MakeRun(ME_Style *s, int nFlags)
{
ME_DisplayItem *item = ME_MakeDI(diRun);
item->member.run.style = s;
item->member.run.ole_obj = NULL;
item->member.run.nFlags = nFlags;
item->member.run.nCharOfs = -1;
item->member.run.len = 0;
item->member.run.para = NULL;
ME_AddRefStyle(s);
return item;
}
/******************************************************************************
* ME_InsertRunAtCursor
*
* 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_DisplayItem *
ME_InsertRunAtCursor(ME_TextEditor *editor, ME_Cursor *cursor, ME_Style *style,
const WCHAR *str, int len, int flags)
{
ME_DisplayItem *pDI;
if (cursor->nOffset)
ME_SplitRunSimple(editor, cursor);
add_undo_delete_run( editor, cursor->pPara->member.para.nCharOfs +
cursor->pRun->member.run.nCharOfs, len );
pDI = ME_MakeRun(style, flags);
pDI->member.run.nCharOfs = cursor->pRun->member.run.nCharOfs;
pDI->member.run.len = len;
pDI->member.run.para = cursor->pRun->member.run.para;
ME_InsertString( pDI->member.run.para->text, pDI->member.run.nCharOfs, str, len );
ME_InsertBefore(cursor->pRun, pDI);
TRACE("Shift length:%d\n", len);
ME_PropagateCharOffset(cursor->pRun, len);
cursor->pPara->member.para.nFlags |= MEPF_REWRAP;
return pDI;
}
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;
HGDIOBJ hOldFont;
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 (c->editor->cPasswordMask)
{
mask_text = ME_MakeStringR( c->editor->cPasswordMask, run->len );
str = mask_text->szData;
}
else
str = get_text( run, 0 );
hOldFont = ME_SelectStyleFont(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 );
ME_UnselectStyleFont(c, run->style, hOldFont);
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)
{
HGDIOBJ hOldFont;
if (c->hDC) {
hOldFont = ME_SelectStyleFont(c, s);
GetTextExtentPoint32W(c->hDC, szText, nChars, size);
ME_UnselectStyleFont(c, s, hOldFont);
} 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 (c->editor->cPasswordMask)
{
mask_text = ME_MakeStringR(c->editor->cPasswordMask, 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;
int nMaxLen = run->len;
if (nLen>nMaxLen)
nLen = nMaxLen;
/* FIXME the following call also ensures that TEXTMETRIC structure is filled
* this is wasteful for MERF_NONTEXT runs, but that shouldn't matter
* in practice
*/
if (c->editor->cPasswordMask)
{
ME_String *szMasked = ME_MakeStringR(c->editor->cPasswordMask,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;
PARAFORMAT2 *pFmt = para->pFmt;
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 = ME_GetInsertStyle(editor, 0);
s = ME_ApplyStyle(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 *pFmt)
{
ME_DisplayItem *para;
ME_DisplayItem *run;
ME_DisplayItem *end_run = NULL;
if (end && start->pRun == end->pRun && start->nOffset == end->nOffset)
return;
if (start->nOffset)
{
/* SplitRunSimple 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_DisplayItem *split_run = ME_SplitRunSimple(editor, start);
if (end && end->pRun == split_run)
{
end->pRun = start->pRun;
end->nOffset -= split_offset;
}
}
if (end && end->nOffset)
ME_SplitRunSimple(editor, end);
end_run = end ? end->pRun : NULL;
run = start->pRun;
para = start->pPara;
para->member.para.nFlags |= MEPF_REWRAP;
while(run != end_run)
{
ME_Style *new_style = ME_ApplyStyle(run->member.run.style, pFmt);
/* ME_DumpStyle(new_style); */
add_undo_set_char_fmt( editor, para->member.para.nCharOfs + run->member.run.nCharOfs,
run->member.run.len, &run->member.run.style->fmt );
ME_ReleaseStyle(run->member.run.style);
run->member.run.style = new_style;
run = ME_FindItemFwd(run, diRunOrParagraph);
if (run && run->type == diParagraph)
{
para = run;
run = ME_FindItemFwd(run, diRun);
if (run != end_run)
para->member.para.nFlags |= MEPF_REWRAP;
}
}
}
/******************************************************************************
* ME_SetDefaultCharFormat
*
* Applies a style change to the default character style.
*/
void ME_SetDefaultCharFormat(ME_TextEditor *editor, CHARFORMAT2W *mod)
{
ME_Style *style;
assert(mod->cbSize == sizeof(CHARFORMAT2W));
style = ME_ApplyStyle(editor->pBuffer->pDefaultStyle, mod);
editor->pBuffer->pDefaultStyle->fmt = style->fmt;
editor->pBuffer->pDefaultStyle->tm = style->tm;
ME_ReleaseStyle(style);
ME_MarkAllForWrapping(editor);
/* pcf = editor->pBuffer->pDefaultStyle->fmt; */
}
static void ME_GetRunCharFormat(ME_TextEditor *editor, ME_DisplayItem *run, CHARFORMAT2W *pFmt)
{
ME_CopyCharFormat(pFmt, &run->member.run.style->fmt);
if ((pFmt->dwMask & CFM_UNDERLINETYPE) && (pFmt->bUnderlineType == CFU_CF1UNDERLINE))
{
pFmt->dwMask |= CFM_UNDERLINE;
pFmt->dwEffects |= CFE_UNDERLINE;
}
if ((pFmt->dwMask & CFM_UNDERLINETYPE) && (pFmt->bUnderlineType == CFU_UNDERLINENONE))
{
pFmt->dwMask |= CFM_UNDERLINE;
pFmt->dwEffects &= ~CFE_UNDERLINE;
}
}
/******************************************************************************
* 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 *pFmt)
{
ME_DisplayItem *run, *run_end;
CHARFORMAT2W tmp;
run = from->pRun;
/* special case - if selection is empty, take previous char's formatting */
if (from->pRun == to->pRun && from->nOffset == to->nOffset)
{
if (!from->nOffset)
{
ME_DisplayItem *tmp_run = ME_FindItemBack(run, diRunOrParagraph);
if (tmp_run->type == diRun) {
ME_GetRunCharFormat(editor, tmp_run, pFmt);
return;
}
}
ME_GetRunCharFormat(editor, run, pFmt);
return;
}
run_end = to->pRun;
if (!to->nOffset)
run_end = ME_FindItemBack(run_end, diRun);
ME_GetRunCharFormat(editor, run, pFmt);
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 = ME_FindItemFwd(run, diRun);
ZeroMemory(&tmp, sizeof(tmp));
tmp.cbSize = sizeof(tmp);
ME_GetRunCharFormat(editor, run, &tmp);
assert((tmp.dwMask & dwAttribs) == dwAttribs);
/* reset flags that differ */
if (pFmt->yHeight != tmp.yHeight)
pFmt->dwMask &= ~CFM_SIZE;
if (pFmt->dwMask & CFM_FACE)
{
if (!(tmp.dwMask & CFM_FACE))
pFmt->dwMask &= ~CFM_FACE;
else if (lstrcmpW(pFmt->szFaceName, tmp.szFaceName) ||
pFmt->bPitchAndFamily != tmp.bPitchAndFamily)
pFmt->dwMask &= ~CFM_FACE;
}
if (pFmt->yHeight != tmp.yHeight)
pFmt->dwMask &= ~CFM_SIZE;
if (pFmt->bUnderlineType != tmp.bUnderlineType)
pFmt->dwMask &= ~CFM_UNDERLINETYPE;
if (pFmt->dwMask & CFM_COLOR)
{
if (!((pFmt->dwEffects&CFE_AUTOCOLOR) & (tmp.dwEffects&CFE_AUTOCOLOR)))
{
if (pFmt->crTextColor != tmp.crTextColor)
pFmt->dwMask &= ~CFM_COLOR;
}
}
pFmt->dwMask &= ~((pFmt->dwEffects ^ tmp.dwEffects) & dwEffects);
pFmt->dwEffects = tmp.dwEffects;
} while(run != run_end);
}
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