private void addOperation(IPDFPageOperation operation, MemoryStream stream)
{
operation.WriteBytes(stream);
}
public static void fillListStrings(List <CoordinateText> listStrings, float[] beginMatrix, IPDFObject contents, Resources resources)
{
PageOperationParser parser = new PageOperationParser(contents);
parser.SetParserMode(PageOperationParser.ParserMode.TextExtraction);
Stack <float[]> stackCM = new Stack <float[]>();
Stack <float[]> stackTM = new Stack <float[]>();
Stack <TextState> stackTextState = new Stack <TextState>();
float[] currentCM = new float[6] {
beginMatrix[0], beginMatrix[1], beginMatrix[2], beginMatrix[3], beginMatrix[4], beginMatrix[5]
};
float[] currentTM = new float[6] {
1, 0, 0, 1, 0, 0
};
TextState currentTextState = new TextState();
float[] currentAllTransform = new float[6] {
1, 0, 0, 1, 0, 0
};
setAllTransform(currentTM, currentCM, ref currentAllTransform);
int currentWeight = 0;
bool isShowText = false;
IPDFPageOperation operation = null;
while ((operation = parser.Next()) != null)
{
switch (operation.Type)
{
//CanvasState
case PageOperations.Transform:
transform(ref currentCM, (Transform)operation);
setAllTransform(currentTM, currentCM, ref currentAllTransform);
break;
case PageOperations.SaveGraphicsState:
stackTM.Push(new float[] { currentTM[0], currentTM[1], currentTM[2], currentTM[3], currentTM[4], currentTM[5] });
stackCM.Push(new float[] { currentCM[0], currentCM[1], currentCM[2], currentCM[3], currentCM[4], currentCM[5] });
stackTextState.Push(new TextState(currentTextState));
break;
case PageOperations.RestoreGraphicsState:
if (stackTM.Count != 0)
{
currentTM = stackTM.Pop();
currentCM = stackCM.Pop();
currentTextState = stackTextState.Pop();
setAllTransform(currentTM, currentCM, ref currentAllTransform);
}
break;
case PageOperations.DoXObject:
PDFDictionaryStream dict = resources.GetResource(((DoXObject)operation).Name, ResourceType.XObject) as PDFDictionaryStream;
if (dict != null)
{
PDFName type = dict.Dictionary["Subtype"] as PDFName;
if (type != null)
{
if (type.GetValue() == "Form")
{
dict.Decode();
float[] matrix = new float[6] {
1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f
};
PDFArray array = dict.Dictionary["Matrix"] as PDFArray;
if (array != null)
{
for (int i = 0; i < array.Count && i < 6; ++i)
{
PDFNumber number = array[i] as PDFNumber;
if (number != null)
{
matrix[i] = (float)number.GetValue();
}
}
}
mulMatrix(currentCM, ref matrix);
fillListStrings(listStrings, matrix, dict, new Resources(dict.Dictionary["Resources"] as PDFDictionary, false));
}
}
}
break;
//Text
case PageOperations.BeginText:
isShowText = false;
setDefaultTextMatrix(ref currentTM);
setAllTransform(currentTM, currentCM, ref currentAllTransform);
break;
case PageOperations.EndText:
isShowText = false;
setDefaultTextMatrix(ref currentTM);
setAllTransform(currentTM, currentCM, ref currentAllTransform);
break;
//TextPosition
case PageOperations.TextMatrix:
isShowText = false;
setTM(ref currentTM, (TextMatrix)operation);
setAllTransform(currentTM, currentCM, ref currentAllTransform);
break;
case PageOperations.MoveTextPos:
isShowText = false;
moveTextPos(ref currentTM, (MoveTextPos)operation);
setAllTransform(currentTM, currentCM, ref currentAllTransform);
break;
case PageOperations.MoveTextPosToNextLine:
isShowText = false;
moveTextPos(ref currentTM, currentTextState.Leading);
setAllTransform(currentTM, currentCM, ref currentAllTransform);
break;
case PageOperations.MoveTextPosWithLeading:
isShowText = false;
currentTextState.Leading = -((MoveTextPosWithLeading)operation).TY;
moveTextPos(ref currentTM, (MoveTextPosWithLeading)operation);
setAllTransform(currentTM, currentCM, ref currentAllTransform);
break;
//TextState
case PageOperations.TextFont:
changeFont(ref currentTextState, resources, (TextFont)operation);
break;
case PageOperations.TextLeading:
currentTextState.Leading = ((TextLeading)operation).Leading;
break;
case PageOperations.TextRise:
currentTextState.Rize = ((TextRise)operation).Rise;
break;
case PageOperations.WordSpacing:
currentTextState.WordSpace = ((WordSpacing)operation).WordSpace;
break;
case PageOperations.CharacterSpacing:
currentTextState.CharSpace = ((CharacterSpacing)operation).CharSpace;
break;
case PageOperations.HorizontalScaling:
currentTextState.Scale = ((HorizontalScaling)operation).Scale;
break;
//TextRead
case PageOperations.ShowText:
if (currentTextState.FontBase != null)
{
addShowText(listStrings, currentAllTransform, ref currentWeight, currentTextState, isShowText, (ShowText)operation);
isShowText = true;
}
break;
case PageOperations.ShowTextStrings:
if (currentTextState.FontBase != null)
{
addShowTextStrings(listStrings, currentAllTransform, ref currentWeight, currentTextState, isShowText, (ShowTextStrings)operation);
isShowText = true;
}
break;
case PageOperations.ShowTextFromNewLine:
if (currentTextState.FontBase != null)
{
moveTextPos(ref currentTM, currentTextState.Leading);
setAllTransform(currentTM, currentCM, ref currentAllTransform);
addShowText(listStrings, currentAllTransform, currentWeight, currentTextState, (ShowTextFromNewLine)operation);
++currentWeight;
isShowText = true;
}
break;
case PageOperations.ShowTextFromNewLineWithSpacing:
if (currentTextState.FontBase != null)
{
currentTextState.CharSpace = ((ShowTextFromNewLineWithSpacing)operation).CharacterSpacing;
currentTextState.WordSpace = ((ShowTextFromNewLineWithSpacing)operation).WordSpacing;
moveTextPos(ref currentTM, currentTextState.Leading);
setAllTransform(currentTM, currentCM, ref currentAllTransform);
addShowText(listStrings, currentAllTransform, currentWeight, currentTextState, (ShowTextFromNewLineWithSpacing)operation);
++currentWeight;
isShowText = true;
}
break;
}
}
}
