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wine/dlls/riched20/run.c
Dylan Smith 297716e01c richedit: Made sure text is offset by formatting rectangle. 
The formatting rectangle is set with EM_SETRECT, and retrieved with
EM_GETRECT, so it corresponds to rcFormat in the code.  This defines the
area that the richedit control should draw the text so that it is
offset by the top-left corner of the formatting rectangle, and clipped
so that it doesn't draw past the bottom or right hand side.  Thus this
is important for implementing windowless richedit controls to not
interfere with the rest of the window.
2008-12-18 14:19:40 +01:00

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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_w(p->member.run.strText->szData), 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.strText->nLen, debugstr_w(p->member.run.strText->szData),
p->member.run.nFlags,
p->member.run.style->fmt.dwMask & p->member.run.style->fmt.dwEffects);
assert(ofs == p->member.run.nCharOfs);
if (p->member.run.nFlags & MERF_ENDPARA) {
assert(p->member.run.nCR + p->member.run.nLF > 0);
ofs += p->member.run.nCR + p->member.run.nLF;
}
else
ofs += ME_StrLen(p->member.run.strText);
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, ME_DisplayItem *pRun, int nOfs)
{
ME_DisplayItem *pPara;
assert(pRun->type == diRun);
assert(pRun->member.run.nCharOfs != -1);
pPara = ME_FindItemBack(pRun, diParagraph);
assert(pPara);
assert(pPara->type==diParagraph);
return pPara->member.para.nCharOfs + pRun->member.run.nCharOfs
+ ME_VPosToPos(pRun->member.run.strText, 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->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 **ppRun, int *pOfs)
{
ME_DisplayItem *pPara;
int nParaOfs;
pPara = editor->pBuffer->pFirst->member.para.next_para;
assert(pPara);
assert(ppRun);
assert(pOfs);
while (pPara->type == diParagraph)
{
nParaOfs = pPara->member.para.nCharOfs;
assert(nCharOfs >= nParaOfs);
if (nCharOfs < pPara->member.para.next_para->member.para.nCharOfs)
{
int eollen = 1;
*ppRun = ME_FindItemFwd(pPara, diRun);
assert(*ppRun);
while (!((*ppRun)->member.run.nFlags & MERF_ENDPARA))
{
ME_DisplayItem *pNext = ME_FindItemFwd(*ppRun, diRun);
assert(pNext);
assert(pNext->type == diRun);
if (nCharOfs < nParaOfs + pNext->member.run.nCharOfs) {
*pOfs = ME_PosToVPos((*ppRun)->member.run.strText,
nCharOfs - nParaOfs - (*ppRun)->member.run.nCharOfs);
return;
}
*ppRun = pNext;
}
/* Recover proper character length of this line break */
eollen = (*ppRun)->member.run.nCR + (*ppRun)->member.run.nLF;
if (nCharOfs >= nParaOfs + (*ppRun)->member.run.nCharOfs &&
nCharOfs < nParaOfs + (*ppRun)->member.run.nCharOfs + eollen) {
/* FIXME: Might cause problems when actually requiring an offset in the
middle of a run that is considered a single line break */
*pOfs = 0;
return;
}
}
pPara = pPara->member.para.next_para;
}
*ppRun = ME_FindItemBack(editor->pBuffer->pLast, diRun);
*pOfs = 0;
assert((*ppRun)->member.run.nFlags & MERF_ENDPARA);
}
/******************************************************************************
* 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 += ME_StrVLen(p->member.run.strText);
}
}
ME_AppendString(p->member.run.strText, pNext->member.run.strText);
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_SplitRun
*
* Splits a run into two in a given place. It also updates the screen position
* and size (extent) of the newly generated runs.
*/
ME_DisplayItem *ME_SplitRun(ME_WrapContext *wc, ME_DisplayItem *item, int nVChar)
{
ME_TextEditor *editor = wc->context->editor;
ME_DisplayItem *item2 = NULL;
ME_Run *run, *run2;
ME_Paragraph *para = &ME_GetParagraph(item)->member.para;
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_w(run->strText->szData),
run->pt.x, run->pt.y);
item2 = ME_SplitRunSimple(editor, item, nVChar);
run2 = &item2->member.run;
ME_CalcRunExtent(wc->context, para, wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, run);
ME_CalcRunExtent(wc->context, para, wc->nRow ? wc->nLeftMargin : wc->nFirstMargin, run2);
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_w(run->strText->szData), run->pt.x, run->pt.y,
debugstr_w(run2->strText->szData), run2->pt.x, run2->pt.y);
}
return item2;
}
/******************************************************************************
* 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_DisplayItem *item, int nVChar)
{
ME_Run *run = &item->member.run;
ME_DisplayItem *item2;
ME_Run *run2;
int i;
assert(nVChar > 0 && nVChar < ME_StrVLen(run->strText));
assert(item->type == diRun);
assert(!(item->member.run.nFlags & MERF_NONTEXT));
assert(item->member.run.nCharOfs != -1);
item2 = ME_MakeRun(run->style,
ME_VSplitString(run->strText, nVChar), run->nFlags&MERF_SPLITMASK);
item2->member.run.nCharOfs = item->member.run.nCharOfs+
ME_VPosToPos(item->member.run.strText, nVChar);
run2 = &item2->member.run;
ME_InsertBefore(item->next, item2);
ME_UpdateRunFlags(editor, run);
ME_UpdateRunFlags(editor, run2);
for (i=0; i<editor->nCursors; i++) {
if (editor->pCursors[i].pRun == item &&
editor->pCursors[i].nOffset >= nVChar) {
assert(item2->type == diRun);
editor->pCursors[i].pRun = item2;
editor->pCursors[i].nOffset -= nVChar;
}
}
ME_GetParagraph(item)->member.para.nFlags |= MEPF_REWRAP;
return item2;
}
/******************************************************************************
* ME_MakeRun
*
* A helper function to create run structures quickly.
*/
ME_DisplayItem *ME_MakeRun(ME_Style *s, ME_String *strData, int nFlags)
{
ME_DisplayItem *item = ME_MakeDI(diRun);
item->member.run.style = s;
item->member.run.ole_obj = NULL;
item->member.run.strText = strData;
item->member.run.nFlags = nFlags;
item->member.run.nCharOfs = -1;
ME_AddRefStyle(s);
return item;
}
/******************************************************************************
* ME_InsertRun
*
* Inserts a run at a given character position (offset).
*/
ME_DisplayItem *ME_InsertRun(ME_TextEditor *editor, int nCharOfs, ME_DisplayItem *pItem)
{
ME_Cursor tmp;
ME_DisplayItem *pDI;
assert(pItem->type == diRun || pItem->type == diUndoInsertRun);
ME_CursorFromCharOfs(editor, nCharOfs, &tmp);
pDI = ME_InsertRunAtCursor(editor, &tmp, pItem->member.run.style,
pItem->member.run.strText->szData,
pItem->member.run.strText->nLen,
pItem->member.run.nFlags);
return pDI;
}
/******************************************************************************
* 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;
ME_UndoItem *pUI;
if (cursor->nOffset) {
/* We're inserting at the middle of the existing run, which means that
* that run must be split. It isn't always necessary, but */
cursor->pRun = ME_SplitRunSimple(editor, cursor->pRun, cursor->nOffset);
cursor->nOffset = 0;
}
pUI = ME_AddUndoItem(editor, diUndoDeleteRun, NULL);
if (pUI) {
pUI->nStart = (ME_GetParagraph(cursor->pRun)->member.para.nCharOfs
+ cursor->pRun->member.run.nCharOfs);
pUI->nLen = len;
}
pDI = ME_MakeRun(style, ME_MakeStringN(str, len), flags);
pDI->member.run.nCharOfs = cursor->pRun->member.run.nCharOfs;
ME_InsertBefore(cursor->pRun, pDI);
TRACE("Shift length:%d\n", len);
ME_PropagateCharOffset(cursor->pRun, len);
ME_GetParagraph(cursor->pRun)->member.para.nFlags |= MEPF_REWRAP;
return pDI;
}
/******************************************************************************
* 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 != -1);
if (RUN_IS_HIDDEN(run) || run->nFlags & MERF_TABLESTART)
run->nFlags |= MERF_HIDDEN;
else
run->nFlags &= ~MERF_HIDDEN;
if (ME_IsSplitable(run->strText))
run->nFlags |= MERF_SPLITTABLE;
else
run->nFlags &= ~MERF_SPLITTABLE;
if (!(run->nFlags & MERF_NOTEXT)) {
if (ME_IsWhitespaces(run->strText))
run->nFlags |= MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE;
else
{
run->nFlags &= ~MERF_WHITESPACE;
if (ME_IsWSpace(ME_GetCharFwd(run->strText,0)))
run->nFlags |= MERF_STARTWHITE;
else
run->nFlags &= ~MERF_STARTWHITE;
if (ME_IsWSpace(ME_GetCharBack(run->strText,0)))
run->nFlags |= MERF_ENDWHITE;
else
run->nFlags &= ~MERF_ENDWHITE;
}
}
else
run->nFlags &= ~(MERF_WHITESPACE | MERF_STARTWHITE | MERF_ENDWHITE);
}
/******************************************************************************
* ME_CharFromPoint
*
* Returns a character position 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).
*/
int ME_CharFromPoint(ME_Context *c, int cx, ME_Run *run)
{
int fit = 0;
HGDIOBJ hOldFont;
SIZE sz;
if (!run->strText->nLen)
return 0;
if (run->nFlags & MERF_TAB ||
(run->nFlags & (MERF_ENDCELL|MERF_ENDPARA)) == MERF_ENDCELL)
{
if (cx < run->nWidth/2)
return 0;
return 1;
}
if (run->nFlags & MERF_GRAPHICS)
{
SIZE sz;
ME_GetOLEObjectSize(c, run, &sz);
if (cx < sz.cx)
return 0;
return 1;
}
hOldFont = ME_SelectStyleFont(c, run->style);
if (c->editor->cPasswordMask)
{
ME_String *strMasked = ME_MakeStringR(c->editor->cPasswordMask,ME_StrVLen(run->strText));
GetTextExtentExPointW(c->hDC, strMasked->szData, run->strText->nLen,
cx, &fit, NULL, &sz);
ME_DestroyString(strMasked);
}
else
{
GetTextExtentExPointW(c->hDC, run->strText->szData, run->strText->nLen,
cx, &fit, NULL, &sz);
}
ME_UnselectStyleFont(c, run->style, hOldFont);
return fit;
}
/******************************************************************************
* ME_CharFromPointCursor
*
* Returns a character position inside the run given a run-relative
* pixel horizontal position. This version rounds to the nearest character edge
* (ie. if the second character is at pixel position 8, then for cx=0..3
* it returns 0, and for cx=4..7 it returns 1).
*
* It is used for mouse click handling, for better usability (and compatibility
* with the native control).
*/
int ME_CharFromPointCursor(ME_TextEditor *editor, int cx, ME_Run *run)
{
ME_String *strRunText;
/* This could point to either the run's real text, or it's masked form in a password control */
int fit = 0, fit1 = 0;
ME_Context c;
HGDIOBJ hOldFont;
SIZE sz, sz2, sz3;
if (!run->strText->nLen)
return 0;
if (run->nFlags & (MERF_TAB | MERF_ENDCELL))
{
if (cx < run->nWidth/2)
return 0;
return 1;
}
ME_InitContext(&c, editor, GetDC(editor->hWnd));
if (run->nFlags & MERF_GRAPHICS)
{
SIZE sz;
ME_GetOLEObjectSize(&c, run, &sz);
ME_DestroyContext(&c, editor->hWnd);
if (cx < sz.cx/2)
return 0;
return 1;
}
if (editor->cPasswordMask)
strRunText = ME_MakeStringR(editor->cPasswordMask,ME_StrVLen(run->strText));
else
strRunText = run->strText;
hOldFont = ME_SelectStyleFont(&c, run->style);
GetTextExtentExPointW(c.hDC, strRunText->szData, strRunText->nLen,
cx, &fit, NULL, &sz);
if (fit != strRunText->nLen)
{
int chars = 1;
GetTextExtentPoint32W(c.hDC, strRunText->szData, fit, &sz2);
fit1 = ME_StrRelPos(strRunText, fit, &chars);
GetTextExtentPoint32W(c.hDC, strRunText->szData, fit1, &sz3);
if (cx >= (sz2.cx+sz3.cx)/2)
fit = fit1;
}
if (editor->cPasswordMask)
ME_DestroyString(strRunText);
ME_UnselectStyleFont(&c, run->style, hOldFont);
ME_DestroyContext(&c, editor->hWnd);
return fit;
}
/******************************************************************************
* 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;
hOldFont = ME_SelectStyleFont(c, s);
GetTextExtentPoint32W(c->hDC, szText, nChars, size);
ME_UnselectStyleFont(c, s, hOldFont);
}
/******************************************************************************
* ME_PointFromChar
*
* Returns a run-relative pixel position given a run-relative character
* position (character offset)
*/
int ME_PointFromChar(ME_TextEditor *editor, ME_Run *pRun, int nOffset)
{
SIZE size;
ME_Context c;
ME_String *strRunText;
/* This could point to either the run's real text, or it's masked form in a password control */
ME_InitContext(&c, editor, GetDC(editor->hWnd));
if (pRun->nFlags & MERF_GRAPHICS)
{
if (nOffset)
ME_GetOLEObjectSize(&c, pRun, &size);
ReleaseDC(editor->hWnd, c.hDC);
return nOffset != 0;
}
if (editor->cPasswordMask)
strRunText = ME_MakeStringR(editor->cPasswordMask,ME_StrVLen(pRun->strText));
else
strRunText = pRun->strText;
ME_GetTextExtent(&c, strRunText->szData, nOffset, pRun->style, &size);
ReleaseDC(editor->hWnd, c.hDC);
if (editor->cPasswordMask)
ME_DestroyString(strRunText);
return size.cx;
}
/******************************************************************************
* ME_GetRunSizeCommon
*
* Finds width, height, ascent and descent of a run, up to given character
* (nLen).
*/
static 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 = ME_StrVLen(run->strText);
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, run->strText->szData, 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_GetRunSize
*
* Finds width and height (but not ascent and descent) of a part of the run
* up to given character.
*/
SIZE ME_GetRunSize(ME_Context *c, const ME_Paragraph *para,
ME_Run *run, int nLen, int startx)
{
int asc, desc;
return ME_GetRunSizeCommon(c, para, run, nLen, startx, &asc, &desc);
}
/******************************************************************************
* ME_CalcRunExtent
*
* 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.
*/
void ME_CalcRunExtent(ME_Context *c, const ME_Paragraph *para, int startx, ME_Run *run)
{
if (run->nFlags & MERF_HIDDEN)
run->nWidth = 0;
else
{
int nEnd = ME_StrVLen(run->strText);
SIZE size = ME_GetRunSizeCommon(c, para, run, nEnd, startx,
&run->nAscent, &run->nDescent);
run->nWidth = size.cx;
if (!size.cx)
WARN("size.cx == 0\n");
}
}
/******************************************************************************
* ME_MustBeWrapped
*
* This should ensure that the given paragraph is wrapped so that its screen
* row structure may be used. But it doesn't, yet.
*/
void ME_MustBeWrapped(ME_Context *c, ME_DisplayItem *para)
{
assert(para->type == diParagraph);
/* FIXME */
}
/******************************************************************************
* 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)
{
int nFrom, nTo;
ME_GetSelection(editor, &nFrom, &nTo);
if (nFrom == nTo)
{
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_SetCharFormat(editor, nFrom, nTo-nFrom, pFmt);
}
/******************************************************************************
* ME_SetCharFormat
*
* Applies a style change to the specified part of the text
*/
void ME_SetCharFormat(ME_TextEditor *editor, int nOfs, int nChars, CHARFORMAT2W *pFmt)
{
ME_Cursor tmp, tmp2;
ME_DisplayItem *para;
ME_CursorFromCharOfs(editor, nOfs, &tmp);
if (tmp.nOffset)
tmp.pRun = ME_SplitRunSimple(editor, tmp.pRun, tmp.nOffset);
ME_CursorFromCharOfs(editor, nOfs+nChars, &tmp2);
if (tmp2.nOffset)
tmp2.pRun = ME_SplitRunSimple(editor, tmp2.pRun, tmp2.nOffset);
para = ME_GetParagraph(tmp.pRun);
para->member.para.nFlags |= MEPF_REWRAP;
while(tmp.pRun != tmp2.pRun)
{
ME_UndoItem *undo = NULL;
ME_Style *new_style = ME_ApplyStyle(tmp.pRun->member.run.style, pFmt);
/* ME_DumpStyle(new_style); */
undo = ME_AddUndoItem(editor, diUndoSetCharFormat, NULL);
if (undo) {
undo->nStart = tmp.pRun->member.run.nCharOfs+para->member.para.nCharOfs;
undo->nLen = tmp.pRun->member.run.strText->nLen;
undo->di.member.ustyle = tmp.pRun->member.run.style;
/* we'd have to addref undo...ustyle and release tmp...style
but they'd cancel each other out so we can do nothing instead */
}
else
ME_ReleaseStyle(tmp.pRun->member.run.style);
tmp.pRun->member.run.style = new_style;
tmp.pRun = ME_FindItemFwd(tmp.pRun, diRunOrParagraph);
if (tmp.pRun->type == diParagraph)
{
para = tmp.pRun;
tmp.pRun = ME_FindItemFwd(tmp.pRun, diRun);
if (tmp.pRun != tmp2.pRun)
para->member.para.nFlags |= MEPF_REWRAP;
}
assert(tmp.pRun);
}
}
/******************************************************************************
* 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)
{
int nFrom, nTo;
ME_GetSelection(editor, &nFrom, &nTo);
if (nFrom == nTo && editor->pBuffer->pCharStyle)
{
ME_CopyCharFormat(pFmt, &editor->pBuffer->pCharStyle->fmt);
return;
}
ME_GetCharFormat(editor, nFrom, nTo, 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, int nFrom, int nTo, CHARFORMAT2W *pFmt)
{
ME_DisplayItem *run, *run_end;
int nOffset, nOffset2;
CHARFORMAT2W tmp;
ME_RunOfsFromCharOfs(editor, nFrom, &run, &nOffset);
if (nFrom == nTo) /* special case - if selection is empty, take previous char's formatting */
{
if (!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;
}
if (nTo>nFrom) /* selection consists of chars from nFrom up to nTo-1 */
nTo--;
ME_RunOfsFromCharOfs(editor, nTo, &run_end, &nOffset2);
ME_GetRunCharFormat(editor, run, pFmt);
if (run == run_end) return;
do {
/* FIXME add more style feature comparisons */
int nAttribs = CFM_SIZE | CFM_FACE | CFM_COLOR | CFM_UNDERLINETYPE;
int nEffects = 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 & nAttribs) == nAttribs);
/* 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) & nEffects);
pFmt->dwEffects = tmp.dwEffects;
} while(run != run_end);
}
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