run.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

 * (nLen).
 */
static SIZE ME_GetRunSizeCommon(ME_Context *c, ME_Paragraph *para, ME_Run *run, int nLen,
                                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;
    int lpsx = GetDeviceCaps(c->hDC, LOGPIXELSX);
    PARAFORMAT2 *pFmt = para->pFmt;
    do {
      if (i < pFmt->cTabCount)
      {
        pos = pFmt->rgxTabs[i]&0x00FFFFFF;
        i++;
      }
      else
      {
        pos += 720-(pos%720);
      }
      ppos = pos*lpsx/1440;
      if (ppos>run->pt.x) {
        size.cx = ppos - run->pt.x;
        break;
      }
    } while(1);
    size.cy = *pAscent + *pDescent;
    return size;
  }
  if (run->nFlags & MERF_GRAPHICS)
  {
    ME_GetGraphicsSize(c->editor, run, &size);
    if (size.cy > *pAscent)
      *pAscent = size.cy;
    /* descent is unchanged */
    return size;
  }
  if (run->nFlags & MERF_CELL)
  {
    int lpsx = GetDeviceCaps(c->hDC, LOGPIXELSX);

    size.cx = run->pCell->nRightBoundary * lpsx / 1440 - run->pt.x;
    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, ME_Paragraph *para, ME_Run *run, int nLen)
{
  int asc, desc;
  return ME_GetRunSizeCommon(c, para, run, nLen, &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, ME_Paragraph *para, 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, &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;
  ME_UndoItem *undo;

  assert(mod->cbSize == sizeof(CHARFORMAT2W));
  undo = ME_AddUndoItem(editor, diUndoSetDefaultCharFormat, NULL);
  if (undo) {
    undo->nStart = -1;
    undo->nLen = -1;
    undo->di.member.ustyle = editor->pBuffer->pDefaultStyle;
    ME_AddRefStyle(undo->di.member.ustyle);
  }
  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);
}

/******************************************************************************
 * 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)
{
  int nFrom, nTo;
  ME_GetSelection(editor, &nFrom, &nTo);
  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;
    int nEffects = CFM_BOLD | CFM_ITALIC | CFM_UNDERLINE;

    run = ME_FindItemFwd(run, diRun);

    ZeroMemory(&tmp, sizeof(tmp));
    tmp.cbSize = sizeof(tmp);
    ME_GetRunCharFormat(editor, run, &tmp);

    assert((tmp.dwMask & nAttribs) == nAttribs);
    assert((tmp.dwMask & nEffects) == nEffects);
    /* 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->dwMask &= ~CFM_FACE;
    }
    if (pFmt->yHeight != tmp.yHeight)
      pFmt->dwMask &= ~CFM_SIZE;
    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);

  } while(run != run_end);
}