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;
}
internal bool JustifyContent(PDFUnit total, PDFUnit current, PDFUnit available, bool all, List <PDFTextRunCharacter> runCache, ref PDFTextRenderOptions currOptions)
{
if (this.Runs.Count < 1)
{
return(false);
}
bool shouldJustify = all;
PDFLayoutRun last = this.Runs[this.Runs.Count - 1];
if (last is PDFTextRunNewLine && (last as PDFTextRunNewLine).IsHardReturn == false)
{
shouldJustify = true;
}
if (shouldJustify)
{
runCache.Clear();
bool intext = (null != currOptions); //if we have text render options then even if we are the first run we can be considered as inside a text block
int charCount = 0;
int spaceCount = 0;
PDFTextRunCharacter lastchars = null;
for (int i = 0; i < this.Runs.Count; i++)
{
PDFLayoutRun cur = this.Runs[i];
if (cur is PDFTextRunBegin)
{
currOptions = ((PDFTextRunBegin)cur).TextRenderOptions;
if (!intext)
{
intext = true;
}
}
else if (cur is PDFTextRunCharacter && intext)
{
PDFTextRunCharacter chars = cur as PDFTextRunCharacter;
if (!(currOptions.WordSpacing.HasValue || currOptions.CharacterSpacing.HasValue))
{
AddCharactersAndSpaces(chars.Characters, ref charCount, ref spaceCount);
lastchars = chars;
}
}
else if (cur is PDFLayoutComponentRun)
{
lastchars = null;
}
}
// Post process to calculate the required spacing
// if we have some text in our line.
if (intext && (spaceCount + charCount > 0))
{
if (null != lastchars && lastchars.Characters.EndsWith(" "))
{
lastchars.Characters = lastchars.Characters.Substring(0, lastchars.Characters.Length - 1);
spaceCount -= 1;
}
double spaceToCharFactor = 10; // apply ten times more to spaces than characters.
double full = (spaceCount * spaceToCharFactor) + charCount;
this._linespacingOptions = new ExtraSpacingOptions()
{
CharSpace = available / full, WordSpace = (available / full) * spaceToCharFactor, Options = currOptions
};
charCount = 0;
spaceCount = 0;
PDFUnit currWidth = 0;
PDFUnit change = PDFUnit.Zero;
for (int i = 0; i < this.Runs.Count; i++)
{
PDFLayoutRun cur = this.Runs[i];
if (cur is PDFTextRunBegin)
{
PDFTextRunBegin begin = (PDFTextRunBegin)cur;
currOptions = begin.TextRenderOptions;
if (i > 0)
{
change = (_linespacingOptions.WordSpace * spaceCount) + (_linespacingOptions.CharSpace * charCount);
begin.LineInset += change;
}
}
else if (cur is PDFTextRunCharacter)
{
if (!currOptions.WordSpacing.HasValue || !currOptions.CharacterSpacing.HasValue)
{
PDFTextRunCharacter chars = cur as PDFTextRunCharacter;
int runChars = 0;
int runSpaces = 0;
AddCharactersAndSpaces(chars.Characters, ref runChars, ref runSpaces);
charCount += runChars;
spaceCount += runSpaces;
chars.ExtraSpace = (_linespacingOptions.WordSpace * runSpaces) + (_linespacingOptions.CharSpace * runChars);
}
}
else if (cur is PDFLayoutComponentRun)
{
if (i > 0)
{
PDFLayoutComponentRun comprun = (cur as PDFLayoutComponentRun);
PDFRect bounds = comprun.TotalBounds;
bounds.X += (_linespacingOptions.WordSpace * spaceCount) + (_linespacingOptions.CharSpace * charCount);
comprun.TotalBounds = bounds;
}
}
else if (cur is PDFTextRunNewLine)
{
PDFTextRunNewLine newLine = (cur as PDFTextRunNewLine);
newLine.Offset = new PDFSize(newLine.Offset.Width + change, newLine.Offset.Height);
}
}
}
}
return(shouldJustify);
}
protected virtual void RenderTextDecoration(PDFTextRunEnd endRun, PDFRenderContext context, PDFWriter writer, PDFUnit vOffset, PDFUnit linethickness)
{
if (context.ShouldLogDebug)
{
context.TraceLog.Begin(TraceLevel.Debug, "Text Decoration", "Starting to render text decorations");
}
//set up the graphics context
PDFPen pen = PDFPen.Create(this.TextRenderOptions.FillBrush, linethickness);
context.Graphics.SaveGraphicsState();
pen.SetUpGraphics(context.Graphics, this.TotalBounds);
bool drawing = false;
PDFPoint linestart = new PDFPoint(this.StartTextCursor.Width, this.StartTextCursor.Height + vOffset);
foreach (PDFLayoutLine line in this.Lines)
{
PDFUnit linewidth = 0;
foreach (PDFLayoutRun run in line.Runs)
{
if (run == this)
{
drawing = true;
//lineoffset += this.LineInset;
}
else if (run == endRun)
{
drawing = false;
break;
}
else if (drawing)
{
if (run is PDFTextRunCharacter)
{
PDFTextRunCharacter chars = (PDFTextRunCharacter)run;
PDFPoint start = new PDFPoint(linestart.X + linewidth, linestart.Y);
PDFPoint end = new PDFPoint(linestart.X + linewidth + chars.Width + chars.ExtraSpace, linestart.Y);
context.Graphics.DrawLine(start, end);
if (context.ShouldLogDebug)
{
context.TraceLog.Add(TraceLevel.Debug, "Text Decoration", "Drawn line from " + start + " to " + end);
}
linewidth += chars.Width;
}
else if (run is PDFTextRunEnd)
{
}
else if (run is PDFTextRunNewLine)
{
PDFTextRunNewLine newline = (PDFTextRunNewLine)run;
PDFSize offset = newline.Offset;
if (null != newline.NextLineSpacer)
{
PDFUnit nextoffset = newline.NextLineSpacer.Width;
offset.Width = nextoffset - offset.Width;
}
linestart.X += offset.Width;
linestart.Y += offset.Height;
}
else if (run is PDFTextRunSpacer)
{
//PDFTextRunSpacer spacer = (PDFTextRunSpacer)run;
//cursor.X += spacer.Width;
}
else if (run is PDFTextRunProxy)
{
PDFTextRunProxy chars = (PDFTextRunProxy)run;
PDFPoint start = new PDFPoint(linestart.X + linewidth, linestart.Y);
PDFPoint end = new PDFPoint(linestart.X + linewidth + chars.Width, linestart.Y);
context.Graphics.DrawLine(start, end);
if (context.ShouldLogDebug)
{
context.TraceLog.Add(TraceLevel.Debug, "Text Decoration", "Drawn line from " + start + " to " + end);
}
linewidth += chars.Width;
}
}
}
}
if (context.ShouldLogDebug)
{
context.TraceLog.End(TraceLevel.Debug, "Text Decoration", "Completed the renderering of text decorations");
}
//tear down the current graphics state
context.Graphics.RestoreGraphicsState();
}
