/// <summary>
/// Creates a new Text character run and adds it to the current line.
/// </summary>
/// <param name="size">the size of the run in PDFUnits</param>
/// <param name="chars">The characters that should be rendered in the run</param>
private void AddProxyToCurrentLine(PDFSize size, PDFTextProxyOp op)
{
this.AssertCurrentLine();
PDFTextRunProxy run = new PDFTextRunProxy(size, op, this.CurrentLine, this.TextComponent);
this.CurrentLine.AddRun(run);
}
/// <summary>
/// Add characters to the line(s), and returns the last width of the characters that were laid out.
/// </summary>
protected virtual PDFUnit AddProxyCharacters(PDFTextProxyOp proxy)
{
this.AssertCurrentLine();
PDFUnit lineheight = this.TextRenderOptions.GetLineHeight();
ZeroLineCounter zeros = new ZeroLineCounter();
PDFSize measured = PDFSize.Empty;
PDFSize required = PDFSize.Empty;
PDFLayoutLine line = this.CurrentLine;
PDFLayoutRegion reg = line.Region;
PDFUnit availH = reg.AvailableHeight;
PDFUnit availW = line.AvailableWidth;
if (availH < lineheight)
{
if (this.Position.OverflowAction != OverflowAction.Clip)
{
availH = lineheight;
}
else
{
this.DoMoveToNextRegion(lineheight);
if (!this.ContinueLayout)
{
return(PDFUnit.Zero);
}
}
}
//Measure the string an get the fitted characters
int fitted;
this.Context.PerformanceMonitor.Begin(PerformanceMonitorType.Text_Measure);
measured = this.MeasureString(availH, availW, proxy.Text, 0, out fitted);
this.Context.PerformanceMonitor.End(PerformanceMonitorType.Text_Measure);
required = new PDFSize(measured.Width, lineheight);
if (fitted < proxy.Text.Length) //cannot split a proxy - must simply be a single run.
{
//try on the next line to see if we can put everything on there.
this.AddSoftReturn(0);
if (!zeros.AssertIncrement(this.Context))
{
return(PDFUnit.Zero);
}
availW = this.CurrentLine.AvailableWidth;
this.Context.PerformanceMonitor.Begin(PerformanceMonitorType.Text_Measure);
measured = this.MeasureString(availH, availW, proxy.Text, 0, out fitted);
this.Context.PerformanceMonitor.End(PerformanceMonitorType.Text_Measure);
if (fitted < proxy.Text.Length) //Still cannot fit the proxy so not much we can do. Log it and return
{
this.Context.TraceLog.Add(TraceLevel.Warning, LOG_CATEGORY, "The text proxy for '" + proxy.Text + "' could not fit the characters on a single line. Overflow of proxies is not currently supported.");
return(measured.Width);
}
required = new PDFSize(measured.Width, lineheight);
}
// everything fitted on the line
zeros.Reset();
this.AddProxyToCurrentLine(required, proxy);
return(required.Width);
}
