/**
* <summary>Scans a content level looking for text.</summary>
*/
/*
* NOTE: Page contents are represented by a sequence of content objects,
* possibly nested into multiple levels.
*/
private void Extract(
ContentScanner level,
PrimitiveComposer composer
)
{
if (level == null)
{
return;
}
while (level.MoveNext())
{
ContentObject content = level.Current;
if (content is Text)
{
ContentScanner.TextWrapper text = (ContentScanner.TextWrapper)level.CurrentWrapper;
int colorIndex = 0;
foreach (ContentScanner.TextStringWrapper textString in text.TextStrings)
{
RectangleF textStringBox = textString.Box.Value;
Console.WriteLine(
"Text ["
+ "x:" + Math.Round(textStringBox.X) + ","
+ "y:" + Math.Round(textStringBox.Y) + ","
+ "w:" + Math.Round(textStringBox.Width) + ","
+ "h:" + Math.Round(textStringBox.Height)
+ "] [font size:" + Math.Round(textString.Style.FontSize) + "]: " + textString.Text
);
// Drawing text character bounding boxes...
colorIndex = (colorIndex + 1) % textCharBoxColors.Length;
composer.SetStrokeColor(textCharBoxColors[colorIndex]);
foreach (TextChar textChar in textString.TextChars)
{
/*
* NOTE: You can get further text information
* (font, font size, text color, text rendering mode)
* through textChar.style.
*/
composer.DrawRectangle(textChar.Box);
composer.Stroke();
}
// Drawing text string bounding box...
composer.BeginLocalState();
composer.SetLineDash(new LineDash(new double[] { 5, 5 }));
composer.SetStrokeColor(textStringBoxColor);
composer.DrawRectangle(textString.Box.Value);
composer.Stroke();
composer.End();
}
}
else if (content is ContainerObject)
{
// Scan the inner level!
Extract(level.ChildLevel, composer);
}
}
}
/// <summary>
/// Extraccción del texto de la página pasada por parámetro
/// con sus respectivas propiedades
/// (font, font size, text color, text rendering mode, text bounding box, etc.).
/// Este escaneo se realiza por niveles, ya que las páginas están representadas
/// por una secuencia de Content Objects, posiblemente anidados en múltiples niveles.
/// </summary>
/// <param name="level">Nivel que estamos iterando</param>
private void Extract(ContentScanner level)
{
if (level == null)
{
return;
}
while (level.MoveNext())
{
ContentObject content = level.Current;
if (content is Text)
{
//Guardamos los TextStrings con sus distintas propiedades
ContentScanner.TextWrapper text = (ContentScanner.TextWrapper)level.CurrentWrapper;
foreach (ContentScanner.TextStringWrapper textString in text.TextStrings)
{
_PdfTextStrings.Add(new PdfClownTextString(
textString.Text,
textString.Style.FillColor,
textString.Style.StrokeColor,
textString.Style.Font,
textString.Style.FontSize)
{
Rectangle = textString.Box
});
}
}
else if (content is XObject)
{
//Scanning the external level
try
{
Extract(((XObject)content).GetScanner(level));
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
Console.WriteLine("Soy la excepción de XObject");
}
}
else if (content is ContainerObject)
{
//Scanning the inner level
try
{
Extract(level.ChildLevel);
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
Console.WriteLine("Soy la excepción de ContainerObject");
}
}
}
}