public List <PdfContentAction> ParseContent()
{
List <PdfContentAction> actions = new List <PdfContentAction>();
List <IPdfElement> elems = new List <IPdfElement>();
do
{
SkipWhitespace();
IPdfElement elem = ParseElement();
if (elem != null)
{
elems.Add(elem);
}
else
{
string token = ParseToken();
if (string.IsNullOrEmpty(token))
{
break;
}
PdfContentAction action = new PdfContentAction(token, elems);
elems = new List <IPdfElement>();
actions.Add(action);
if (action.Token == "ID")
{
// Embbed inline image
byte lineFeed = 0x0A;
byte carriageReturn = 0x0D;
long distToObject = MeasureToMarkers(new char[][] {
new char[] { (char)lineFeed, 'E', 'I' },
new char[] { (char)carriageReturn, (char)lineFeed, 'E', 'I' },
});
byte[] imageBody = GetRawData(distToObject);
SkipEndOfLine();
string endToken = ParseToken();
action.Parameters.Add(new PdfStream {
OriginalData = imageBody,
});
}
}
} while (IsEndOfStream() == false);
return(actions);
}
private void ProcessPageContent()
{
int unknowCount = 0;
int lineCount = 0;
int strokeCount = 0;
int pathCount = 0;
for (int i = 0; i < _page.ContentActions.Count; i++)
{
PdfContentAction action = _page.ContentActions[i];
// Special graphics state
if (action.Token == "q")
{
OpPushGraphState();
}
else if (action.Token == "Q")
{
OpPopGraphState();
}
else if (action.Token == "cm")
{
double a = PdfElementUtils.GetReal(action.Parameters[0], 0);
double b = PdfElementUtils.GetReal(action.Parameters[1], 0);
double c = PdfElementUtils.GetReal(action.Parameters[2], 0);
double d = PdfElementUtils.GetReal(action.Parameters[3], 0);
double e = PdfElementUtils.GetReal(action.Parameters[4], 0);
double f = PdfElementUtils.GetReal(action.Parameters[5], 0);
OpSetGraphMatrix(a, b, c, d, e, f);
}
// Text Operations
else if (action.Token == "BT")
{
OpBeginText();
}
else if (action.Token == "ET")
{
OpEndText();
}
else if (action.Token == "Tc")
{
double charSpacing = PdfElementUtils.GetReal(action.Parameters[0], 0);
OpTextCharSpacing(charSpacing);
}
else if (action.Token == "Tw")
{
double wordSpacing = PdfElementUtils.GetReal(action.Parameters[0], 0);
OpTextWordSpacing(wordSpacing);
}
else if (action.Token == "Tz")
{
// TODO: PdfTextExtractor: Horizontal Scale
}
else if (action.Token == "Tf")
{
string fontName = PdfElementUtils.GetString(action.Parameters[0], string.Empty);
double fontSize = PdfElementUtils.GetReal(action.Parameters[1], 0);
OpTextFont(fontName, fontSize);
}
else if (action.Token == "TL")
{
double leading = PdfElementUtils.GetReal(action.Parameters[0], 0);
OpTextLeading(leading);
}
else if (action.Token == "Tr")
{
// TODO: PdfTextExtractor: Rendering mode
}
else if (action.Token == "Ts")
{
// TODO: PdfTextExtractor: Text rise
}
else if (action.Token == "Td")
{
double x = PdfElementUtils.GetReal(action.Parameters[0], 0);
double y = PdfElementUtils.GetReal(action.Parameters[1], 0);
OpTextDisplace(x, y);
}
else if (action.Token == "TD")
{
double x = PdfElementUtils.GetReal(action.Parameters[0], 0);
double y = PdfElementUtils.GetReal(action.Parameters[1], 0);
OpTextLeading(-y);
OpTextDisplace(x, y);
}
else if (action.Token == "Tm")
{
double a = PdfElementUtils.GetReal(action.Parameters[0], 0);
double b = PdfElementUtils.GetReal(action.Parameters[1], 0);
double c = PdfElementUtils.GetReal(action.Parameters[2], 0);
double d = PdfElementUtils.GetReal(action.Parameters[3], 0);
double e = PdfElementUtils.GetReal(action.Parameters[4], 0);
double f = PdfElementUtils.GetReal(action.Parameters[5], 0);
OpSetTextMatrix(a, b, c, d, e, f);
}
else if (action.Token == "T*")
{
OpTextLineFeed();
}
else if (action.Token == "Tj")
{
string text = PdfElementUtils.GetString(action.Parameters[0], string.Empty);
OpTextPut(text);
}
else if (action.Token == "'")
{
string text = PdfElementUtils.GetString(action.Parameters[0], string.Empty);
OpTextLineFeed();
OpTextPut(text);
}
else if (action.Token == "\"")
{
double wordSpacing = PdfElementUtils.GetReal(action.Parameters[0], 0);
double charSpacing = PdfElementUtils.GetReal(action.Parameters[1], 0);
string text = PdfElementUtils.GetString(action.Parameters[0], string.Empty);
OpTextCharSpacing(charSpacing);
OpTextWordSpacing(wordSpacing);
OpTextPut(text);
}
else if (action.Token == "TJ")
{
OpTextPutMultiple(((PdfArray)action.Parameters[0]));
}
else if (action.Token == "re")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "f")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "g")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "rg")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "BI")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "ID")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "EI")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "W")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "n")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "Do")
{
// TODO: PdfTextExtractor: Interpret this
}
else if (action.Token == "m")
{
// TODO: PdfTextExtractor: Interpret this "moveto: Begin new subpath"
}
else if (action.Token == "l")
{
// TODO: PdfTextExtractor: Interpret this "lineto: Append straight line segment to path"
lineCount++;
}
else if (action.Token == "h")
{
// TODO: PdfTextExtractor: Interpret this "closepath: Close subpath"
pathCount++;
}
else if (action.Token == "W")
{
// TODO: PdfTextExtractor: Interpret this "clip: Set clipping path using nonzero winding number rule"
}
else if (action.Token == "W*")
{
// TODO: PdfTextExtractor: Interpret this "eoclip: Set clipping path using even-odd rule"
}
else if (action.Token == "w")
{
// TODO: PdfTextExtractor: Interpret this "setlinewidth: Set line width"
}
else if (action.Token == "G")
{
// TODO: PdfTextExtractor: Interpret this "setgray: Set gray level for stroking operations"
}
else if (action.Token == "S")
{
// TODO: PdfTextExtractor: Interpret this "stroke: Stroke path"
strokeCount++;
}
else if (action.Token == "M")
{
// TODO: PdfTextExtractor: Interpret this "setmiterlimit: Set miter limit"
}
else
{
unknowCount++;
}
}
FlushTextElement();
}
