/**
* Used for creating sub-TextRenderInfos for each individual character
* @param parent the parent TextRenderInfo
* @param charIndex the index of the character that this TextRenderInfo will represent
* @param horizontalOffset the unscaled horizontal offset of the character that this TextRenderInfo represents
* @since 5.3.3
*/
private TextRenderInfo(TextRenderInfo parent, int charIndex, float horizontalOffset)
{
this.text = parent.text.Substring(charIndex, 1);
this.textToUserSpaceTransformMatrix = new Matrix(horizontalOffset, 0).Multiply(parent.textToUserSpaceTransformMatrix);
this.gs = parent.gs;
this.markedContentInfos = parent.markedContentInfos;
}
/**
* Displays text.
* @param string the text to display
*/
private void DisplayPdfString(PdfString str)
{
String unicode = Decode(str);
//if (w.log) w._tr.WriteLine("RenderText : \"{0}\"", unicode);
TextRenderInfo renderInfo = new TextRenderInfo(unicode, Gs(), textMatrix, markedContentStack);
renderListener.RenderText(renderInfo);
textMatrix = new Matrix(renderInfo.GetUnscaledWidth(), 0).Multiply(textMatrix);
}
/**
*
* @see com.itextpdf.text.pdf.parser.RenderListener#renderText(com.itextpdf.text.pdf.parser.TextRenderInfo)
*/
public virtual void RenderText(TextRenderInfo renderInfo)
{
LineSegment segment = renderInfo.GetBaseline();
if (renderInfo.GetRise() != 0)
{ // remove the rise from the baseline - we do this because the text from a super/subscript render operations should probably be considered as part of the baseline of the text the super/sub is relative to
Matrix riseOffsetTransform = new Matrix(0, -renderInfo.GetRise());
segment = segment.TransformBy(riseOffsetTransform);
}
TextChunk location = new TextChunk(renderInfo.GetText(), segment.GetStartPoint(), segment.GetEndPoint(), renderInfo.GetSingleSpaceWidth());
locationalResult.Add(location);
currentTextBlock.text.Add(location);
}
/**
* Provides detail useful if a listener needs access to the position of each individual glyph in the text render operation
* @return A list of {@link TextRenderInfo} objects that represent each glyph used in the draw operation. The next effect is if there was a separate Tj opertion for each character in the rendered string
* @since 5.3.3
*/
public List <TextRenderInfo> GetCharacterRenderInfos()
{
List <TextRenderInfo> rslt = new List <TextRenderInfo>(text.Length);
DocumentFont font = gs.font;
char[] chars = text.ToCharArray();
float totalWidth = 0;
for (int i = 0; i < chars.Length; i++)
{
float w = font.GetWidth(chars[i]) / 1000.0f;
float wordSpacing = chars[i] == 32 ? gs.wordSpacing : 0f;
TextRenderInfo subInfo = new TextRenderInfo(this, i, totalWidth);
rslt.Add(subInfo);
totalWidth += (w * gs.fontSize + gs.characterSpacing + wordSpacing) * gs.horizontalScaling;
}
return(rslt);
}
