public static Measurement MeasureLine( ParagraphIterator begin, ParagraphIterator end )
{
var m = new Measurement();
for ( ParagraphIterator i = begin ; i < end ; i.Next() ) {
var run = i.Paragraph.Run(i.Run).Run;
char ch = run.Text[i.Character];
BitmapPage page = run.Font.BitmapPageForOrNul( ref ch );
m = Measurement.Merge(m,m.Advance.X,0,page.Measurement);
}
return m;
}
public static string GetBackIterators(Paragraph paragraph)
{
ParagraphIterator iter = new ParagraphIterator(paragraph.Elements);
iter = iter.GetLastLeaf();
string retString = "";
while (iter != null)
{
retString += "[" + iter.Current.GetType().Name + ":]";
if (iter.Current is Text)
retString += ((Text)iter.Current).Content;
iter = iter.GetPreviousLeaf();
}
return retString;
}
public static string GetBackIterators(Paragraph paragraph)
{
ParagraphIterator iter = new ParagraphIterator(paragraph.Elements);
iter = iter.GetLastLeaf();
string retString = "";
while (iter != null)
{
retString += "[" + iter.Current.GetType().Name + ":]";
if (iter.Current is Text)
{
retString += ((Text)iter.Current).Content;
}
iter = iter.GetPreviousLeaf();
}
return(retString);
}
public static IEnumerable<TextRunLine> ToLines( Paragraph para, int maxwidth )
{
int length = para.Length;
var start = new ParagraphIterator() { Paragraph = para };
if ( !start.TryFindAdvance((ch)=>ch!=' ') ) yield break;
var end = start;
end.TryFindAdvance((ch)=>ch==' ');
start.Rewind();
for (;;) {
bool createline = false;
if ( end.Run >= para.Runs ) createline = true;
if (!createline) {
var possibleend = end;
possibleend.TryFindAdvance((ch)=>ch!=' ');
possibleend.TryFindAdvance((ch)=>ch==' ');
if ( MeasureLine(start,possibleend).Bounds.Width > maxwidth ) {
createline = true;
} else {
end = possibleend;
continue;
}
}
if (createline) {
yield return new TextRunLine(start,end);
if ( end.Run >= para.Runs ) yield break;
start = end;
start.TryFindAdvance((ch)=>ch!=' ');
if ( start.Run >= para.Runs ) yield break;
end = start;
end.TryFindAdvance((ch)=>ch==' ');
}
}
}
