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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);
/******************************************************************************
* 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) + c->editor->selofs;
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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