wxCoord
wxGridCellAutoWrapStringRenderer::BreakWord(wxDC& dc,
const wxString& word,
wxCoord maxWidth,
wxArrayString& lines,
wxString& line)
{
wxArrayInt widths;
dc.GetPartialTextExtents(word, widths);
// TODO: Use binary search to find the first element > maxWidth.
const unsigned count = widths.size();
unsigned n;
for ( n = 0; n < count; n++ )
{
if ( widths[n] > maxWidth )
break;
}
if ( n == 0 )
{
// This is a degenerate case: the first character of the word is
// already wider than the available space, so we just can't show it
// completely and have to put the first character in this line.
n = 1;
}
lines.push_back(word.substr(0, n));
// Check if the remainder of the string fits in one line.
//
// Unfortunately we can't use the existing partial text extents as the
// extent of the remainder may be different when it's rendered in a
// separate line instead of as part of the same one, so we have to
// recompute it.
const wxString rest = word.substr(n);
const wxCoord restWidth = dc.GetTextExtent(rest).x;
if ( restWidth <= maxWidth )
{
line = rest;
return restWidth;
}
// Break the rest of the word into lines.
//
// TODO: Perhaps avoid recursion? The code is simpler like this but using a
// loop in this function would probably be more efficient.
return BreakWord(dc, rest, maxWidth, lines, line);
}
WLIST *GetWord(void)
{
WLIST *a;
WordPtr=BreakWord(WordPtr,WordBuffer,WordList,WD_NOISE);
if(!WordPtr)
return((WLIST *)-1);
a=FindInList(WordList,WordBuffer,0);
return(a);
}
int GetNumber(void)
{
int a;
WordPtr=BreakWord(WordPtr,WordBuffer,WordList,WD_NOISE);
if(!WordPtr)
return(-1);
if(sscanf(WordBuffer,"%d",&a)==0)
return(-1);
return(a);
}
void
wxGridCellAutoWrapStringRenderer::BreakLine(wxDC& dc,
const wxString& logicalLine,
wxCoord maxWidth,
wxArrayString& lines)
{
wxCoord lineWidth = 0;
wxString line;
// For each word
wxStringTokenizer wordTokenizer(logicalLine, wxS(" \t"), wxTOKEN_RET_DELIMS);
while ( wordTokenizer.HasMoreTokens() )
{
const wxString word = wordTokenizer.GetNextToken();
const wxCoord wordWidth = dc.GetTextExtent(word).x;
if ( lineWidth + wordWidth < maxWidth )
{
// Word fits, just add it to this line.
line += word;
lineWidth += wordWidth;
}
else
{
// Word does not fit, check whether the word is itself wider that
// available width
if ( wordWidth < maxWidth )
{
// Word can fit in a new line, put it at the beginning
// of the new line.
lines.push_back(line);
line = word;
lineWidth = wordWidth;
}
else // Word cannot fit in available width at all.
{
if ( !line.empty() )
{
lines.push_back(line);
line.clear();
lineWidth = 0;
}
// Break it up in several lines.
lineWidth = BreakWord(dc, word, maxWidth, lines, line);
}
}
}
if ( !line.empty() )
lines.push_back(line);
}
char *GetParsedWord(void)
{
return(WordPtr=BreakWord(WordPtr,WordBuffer,WordList,WD_NOISE));
}
