/// <summary>
/// Adds a spacer of the required width (and height) to the line - inheritors can override this value
/// </summary>
/// <param name="w"></param>
/// <param name="h"></param>
/// <param name="line"></param>
protected virtual PDFTextRunSpacer AddLineInsetRun(PDFUnit w, PDFUnit h, PDFLayoutLine line)
{
PDFTextRunSpacer spacer = new PDFTextRunSpacer(w, h, line, this.TextComponent);
line.AddRun(spacer);
return(spacer);
}
/// <summary>
/// We need to start the text
/// </summary>
protected virtual bool StartText()
{
if (this.Context.ShouldLogDebug)
{
this.Context.TraceLog.Begin(TraceLevel.Verbose, LOG_CATEGORY, "Starting the layout of text component " + this.TextComponent.ID);
}
bool started;
PDFLayoutLine line = this.EnsureFirstLineAvailable(out started);
if (null == line)
{
this.ContinueLayout = false;
return(false);
}
this.CurrentLine = line;
this.Context.Graphics.SetCurrentFont(this.TextRenderOptions.Font);
PDFUnit inset = PDFUnit.Zero;
if (line.IsEmpty == false)
{
inset = line.Width;
}
else if (this.TextRenderOptions.FirstLineInset.HasValue && (this.Position.PositionMode != PositionMode.Inline || started))
{
inset = this.TextRenderOptions.FirstLineInset.Value;
if (inset > 0)
{
PDFTextRunSpacer spacer = new PDFTextRunSpacer(inset, 1, line, null);
line.AddRun(spacer);
}
}
PDFTextRunBegin begin = new PDFTextRunBegin(this.TextRenderOptions, this.CurrentLine, this.TextComponent);
begin.LineInset = inset;
this.CurrentLine.AddRun(begin);
begin.SetOffsetY(this.CurrentLine.OffsetY);
this.CurrentLineInset = inset;
this.BeginningRun = begin;
if (this.Context.ShouldLogDebug)
{
this.Context.TraceLog.End(TraceLevel.Verbose, LOG_CATEGORY, "Completed the layout of text component " + this.TextComponent.ID);
}
else if (this.Context.ShouldLogVerbose)
{
this.Context.TraceLog.Add(TraceLevel.Verbose, LOG_CATEGORY, "Laid out text component " + this.TextComponent.ID);
}
return(true);
}
protected virtual void AddReturn(PDFUnit widthOfLastTextDraw, bool hardReturn)
{
this.AssertCurrentLine();
PDFLayoutLine line = this.CurrentLine;
PDFTextRunNewLine br = new PDFTextRunNewLine(false, line, this.TextRenderOptions, this.TextComponent);
line.AddRun(br);
//The offset is from the start of the last text drawing operation
//and the offset of the start of the current line
PDFUnit lineright = widthOfLastTextDraw;
PDFUnit back = line.Width - lineright;
//Previous - 27 Feb 2015
//br.Offset = new PDFSize(back, line.Height);
//Updated
if (line.BaseLineOffset == 0 || this.TextRenderOptions.Leading.HasValue) //we don't have any begins or ends affecting the flow (or an explicit leading)
{
br.Offset = new PDFSize(back, line.Height);
}
else
{
br.Offset = new PDFSize(back, (line.Height - line.BaseLineOffset) + this.TextRenderOptions.GetAscent());
}
PDFLayoutRegion reg = line.Region;
reg.CloseCurrentItem();
line = reg.BeginNewLine();
this.BeginningRun.Lines.Add(line);
PDFUnit inset;
if (hardReturn)
{
inset = this.TextRenderOptions.GetFirstLineInset();
}
else
{
inset = PDFUnit.Zero;
}
PDFTextRunSpacer spacer = this.AddLineInsetRun(inset, 0, line);
br.NextLineSpacer = spacer;
this.CurrentLine = line;
this.CurrentLineInset = inset;
}