org.jpedal.parser.PdfStreamDecoder Maven / Gradle / Ivy
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
@LICENSE@
*
* ---------------
* PdfStreamDecoder.java
* ---------------
*/
package org.jpedal.parser;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Shape;
import org.jpedal.PdfDecoderInt;
import org.jpedal.color.PdfPaint;
import org.jpedal.constants.PageInfo;
import org.jpedal.exception.PdfException;
import org.jpedal.external.*;
import org.jpedal.fonts.PdfFont;
import org.jpedal.fonts.StandardFonts;
import org.jpedal.javafx.JavaFXSupport;
import org.jpedal.fonts.glyph.T3Size;
import org.jpedal.images.SamplingFactory;
import org.jpedal.io.DefaultErrorTracker;
import org.jpedal.io.ObjectDecoder;
import org.jpedal.io.ObjectStore;
import org.jpedal.io.PdfObjectFactory;
import org.jpedal.io.PdfObjectReader;
import org.jpedal.io.StatusBar;
import org.jpedal.objects.*;
import org.jpedal.objects.layers.PdfLayerList;
import org.jpedal.objects.raw.ExtGStateObject;
import org.jpedal.objects.raw.MCObject;
import org.jpedal.objects.raw.PdfDictionary;
import org.jpedal.objects.raw.PdfObject;
import org.jpedal.objects.raw.XObject;
import org.jpedal.parser.color.*;
import org.jpedal.parser.gs.CM;
import org.jpedal.parser.gs.Q;
import org.jpedal.parser.image.DO;
import org.jpedal.parser.image.ID;
import org.jpedal.parser.image.ImageDecoder;
import org.jpedal.parser.shape.*;
import org.jpedal.parser.text.*;
import org.jpedal.render.DynamicVectorRenderer;
import org.jpedal.utils.LogWriter;
import org.jpedal.utils.repositories.Vector_Int;
import org.jpedal.utils.repositories.generic.Vector_Rectangle_Int;
/**
* Contains the code which 'parses' the commands in the stream and extracts the
* data (images and text). Users should not need to call it.
*/
public class PdfStreamDecoder extends BaseDecoder {
private static boolean showFXShadingMessage;
protected org.jpedal.objects.structuredtext.StructuredContentHandler contentHandler;
int formLevel;
private int BDCDepth = -1;
PdfObjectCache cache;
PdfPageData pageData;
ErrorTracker errorTracker;
PdfObjectReader currentPdfFile;
protected GraphicsState newGS;
protected byte[] pageStream;
PdfLayerList layers;
protected boolean getSamplingOnly;
private boolean isTTHintingRequired;
final Vector_Int textDirections = new Vector_Int();
final Vector_Rectangle_Int textAreas = new Vector_Rectangle_Int();
/**
* shows if t3 glyph uses internal colour or current colour
*/
public boolean ignoreColors;
/**
* images on page
*/
int imageCount;
String lastTextValue = "";
//trap for recursive loop of xform calling itself
int lastDataPointer = -1;
private T3Decoder t3Decoder;
/**
* flag to show if we REMOVE shapes
*/
private boolean removeRenderImages;
//last Trm incase of multple Tj commands
private boolean multipleTJs;
/**
* flags to show we need colour data as well
*/
private boolean textColorExtracted;
/**
* flag to show text is being extracted
*/
private boolean textExtracted = true;
/**
* flag to show content is being rendered
*/
private boolean renderText;
private int tokenNumber;
/**
* lisßt of images used for display
*/
String imagesInFile;
//set threshold - value indicates several possible values
public static final float currentThreshold = 0.595f;
protected ImageHandler customImageHandler;
private PdfFontFactory pdfFontFactory;
boolean isXMLExtraction;
/**
* internal development flag which should not be used
*/
//turn on debugging to see commands
public static final boolean showCommands = false;
// public static boolean showCommands = true;
/**
* interactive display
*/
private StatusBar statusBar;
/**
* store text data and can be passed out to other classes
*/
final PdfData pdfData = new PdfData();
/**
* store image data extracted from pdf
*/
final PdfImageData pdfImages = new PdfImageData();
/**
* used to debug
*/
protected static String indent = "";
/**
* show if possible error in stream data
*/
protected boolean isDataValid = true;
/**
* used to store font information from pdf and font functionality
*/
private PdfFont currentFontData;
protected ObjectStore objectStoreStreamRef;
String formName = "";
public static boolean useTextPrintingForNonEmbeddedFonts;
/**
* allows us to terminate file if looks like might crash JVM due to complexity
*/
private static int maxShapesAllowed = -1;
// Used to get the blendmode of an object in PDFObjectToImage
private int currentBlendMode = PdfDictionary.Normal;
static {
SamplingFactory.setDownsampleMode(null);
/*
* we have PDFs which crashes JVM so workaround to avoid this.
*/
final String maxShapes = System.getProperty("org.jpedal.maxShapeCount");
if (maxShapes != null) {
try {
maxShapesAllowed = Integer.parseInt(maxShapes);
} catch (final Exception e) {
throw new RuntimeException("Your setting (" + maxShapes + ")for org.jpedal.maxShapeCount is not a valid number " + e);
}
}
}
public PdfStreamDecoder(final PdfObjectReader currentPdfFile) {
init(currentPdfFile);
}
/**
* create new StreamDecoder to create display
*/
public PdfStreamDecoder(final PdfObjectReader currentPdfFile, final PdfLayerList layers) {
if (layers != null) {
this.layers = layers;
}
init(currentPdfFile);
}
private void init(final PdfObjectReader currentPdfFile) {
cache = new PdfObjectCache();
gs = new GraphicsState();
errorTracker = new DefaultErrorTracker();
pageData = new PdfPageData();
StandardFonts.checkLoaded(StandardFonts.STD);
StandardFonts.checkLoaded(StandardFonts.MAC);
this.currentPdfFile = currentPdfFile;
pdfFontFactory = new PdfFontFactory(currentPdfFile);
}
/**
* objects off the page, stitch into a stream and decode and put into our
* data object. Could be altered if you just want to read the stream
*
* @param pdfObject
* @throws PdfException
*/
public T3Size decodePageContent(final PdfObject pdfObject) throws PdfException {
try {
//check switched off
parserOptions.imagesProcessedFully = true;
parserOptions.tooManyShapes = false;
//reset count
imageCount = 0;
parserOptions.setPdfLayerList(this.layers);
//reset count
imagesInFile = null; //also reset here as good point as syncs with font code
if (!parserOptions.renderDirectly() && statusBar != null) {
statusBar.percentageDone = 0;
}
if (newGS != null) {
gs = newGS;
} else {
gs = new GraphicsState(0, 0);
}
//save for later
if (parserOptions.isRenderPage()) {
/*
* check setup and throw exception if null
*/
if (current == null) {
throw new PdfException("DynamicVectorRenderer not setup PdfStreamDecoder setStore(...) should be called");
}
current.drawClip(gs, parserOptions.defaultClip, false);
final int pageNum = parserOptions.getPageNumber();
//Paint background here to ensure we all for changed background color in extraction modes
current.writeCustom(DynamicVectorRenderer.PAINT_BACKGROUND, new Rectangle(pageData.getCropBoxX(pageNum), pageData.getCropBoxY(pageNum),
pageData.getCropBoxWidth(pageNum), pageData.getCropBoxHeight(pageNum)));
}
//get the binary data from the file
final byte[] b_data;
byte[][] pageContents = null;
if (pdfObject != null) {
pageContents = pdfObject.getKeyArray(PdfDictionary.Contents);
isDataValid = pdfObject.streamMayBeCorrupt();
}
if (pdfObject != null && pageContents == null) {
b_data = currentPdfFile.readStream(pdfObject, true, true, false, false, false, pdfObject.getCacheName(currentPdfFile.getObjectReader()));
} else if (pageStream != null) {
b_data = pageStream;
} else {
b_data = currentPdfFile.getObjectReader().readPageIntoStream(pdfObject);
}
//trap for recursive loop of xform calling itself
lastDataPointer = -1;
//if page data found, turn it into a set of commands
//and decode the stream of commands
if (b_data != null && b_data.length > 0) {
decodeStreamIntoObjects(b_data, false);
}
//flush fonts
if (!parserOptions.isType3Font()) {
cache.resetFonts();
}
final T3Size t3 = new T3Size();
if (t3Decoder != null) {
t3.x = t3Decoder.T3maxWidth;
t3.y = t3Decoder.T3maxHeight;
ignoreColors = t3Decoder.ignoreColors;
t3Decoder = null;
}
return t3;
} catch (final Error err) {
LogWriter.writeLog("Error " + err);
if (ExternalHandlers.throwMissingCIDError && err.getMessage() != null && err.getMessage().contains("kochi")) {
throw err;
}
errorTracker.addPageFailureMessage("Problem decoding page " + err);
}
return null;
}
public void setObjectValue(final int key, final Object obj) {
switch (key) {
case ValueTypes.Name:
parserOptions.setName((String) obj);
break;
case ValueTypes.PDFPageData:
pageData = (PdfPageData) obj;
//flag if colour info being extracted
if (textColorExtracted) {
pdfData.enableTextColorDataExtraction();
}
break;
/*
* pass in status bar object
*
*/
case ValueTypes.StatusBar:
this.statusBar = (StatusBar) obj;
break;
case ValueTypes.PdfLayerList:
this.layers = (PdfLayerList) obj;
break;
/*
* used internally for structured content extraction.
*/
case ValueTypes.MarkedContent:
if (isHTML) {
contentHandler = new org.jpedal.objects.structuredtext.HTMLStructuredContentHandler(obj, current);
} else {
contentHandler = new org.jpedal.objects.structuredtext.StructuredContentHandler(obj);
}
parserOptions.setContentHandler(contentHandler);
break;
case Options.GlyphTracker:
parserOptions.setCustomGlyphTracker((GlyphTracker) obj);
break;
case ValueTypes.ImageHandler:
this.customImageHandler = (ImageHandler) obj;
if (customImageHandler != null && current != null) {
current.writeCustom(DynamicVectorRenderer.CUSTOM_IMAGE_HANDLER, this.customImageHandler);
}
break;
/*
* setup stream decoder to render directly to g2
* (used by image extraction)
*/
case ValueTypes.DirectRendering:
parserOptions.setRenderDirectly(true);
if (obj != null) {
final Graphics2D g2 = (Graphics2D) obj;
parserOptions.defaultClip = g2.getClip();
}
break;
/* should be called after constructor or other methods may not work*/
case ValueTypes.ObjectStore:
objectStoreStreamRef = (ObjectStore) obj;
if (customImageHandler != null && current != null) {
current.writeCustom(DynamicVectorRenderer.CUSTOM_IMAGE_HANDLER, customImageHandler);
}
break;
case Options.ErrorTracker:
this.errorTracker = (ErrorTracker) obj;
break;
case Options.ShapeTracker:
parserOptions.setCustomShapeTracker((ShapeTracker) obj);
break;
}
}
/**
* flag to show interrupted by user
*/
boolean isPrinting;
/**
* NOT PART OF API tells software to generate glyph when first rendered not
* when decoded. Should not need to be called in general usage
*
* @param key
* @param value
*/
public void setBooleanValue(final int key, final boolean value) {
switch (key) {
case GenerateGlyphOnRender:
parserOptions.setGenerateGlyphOnRender(value);
break;
}
}
/**/
/**
* used internally to allow for colored streams
*/
public void setDefaultColors(final PdfPaint strokeCol, final PdfPaint nonstrokeCol) {
gs.strokeColorSpace.setColor(strokeCol);
gs.nonstrokeColorSpace.setColor(nonstrokeCol);
gs.setStrokeColor(strokeCol);
gs.setNonstrokeColor(nonstrokeCol);
}
/**
* return the data
*/
public Object getObjectValue(final int key) {
switch (key) {
case ValueTypes.PDFData:
if (DecoderOptions.embedWidthData) {
pdfData.widthIsEmbedded();
}
// store page width/height so we can translate 270
// rotation co-ords
//pdfData.maxX = pageData.getMediaBoxWidth(pageNum);
//pdfData.maxY = pageData.getMediaBoxHeight(pageNum);
return pdfData;
case ValueTypes.PDFImages:
return pdfImages;
case ValueTypes.TextAreas:
return textAreas;
case ValueTypes.TextDirections:
return textDirections;
case ValueTypes.DynamicVectorRenderer:
return current;
case PdfDictionary.Font:
return pdfFontFactory.getFontsInFile();
case PdfDictionary.Image:
return imagesInFile;
case DecodeStatus.NonEmbeddedCIDFonts:
return pdfFontFactory.getnonEmbeddedCIDFonts();
case PageInfo.COLORSPACES:
return cache.iterator(PdfObjectCache.ColorspacesUsed);
default:
return null;
}
}
/**
* read page header and extract page metadata
*
* @throws PdfException
*/
public final void readResources(final PdfObject Resources, final boolean resetList) throws PdfException {
if (resetList) {
pdfFontFactory.resetfontsInFile();
}
currentPdfFile.checkResolved(Resources);
cache.readResources(Resources, resetList, currentPdfFile.getObjectReader());
}
/**
* decode the actual 'Postscript' stream into text and images by extracting
* commands and decoding each.
*/
public String decodeStreamIntoObjects(final byte[] stream, final boolean returnText) {
if (stream.length == 0) {
return null;
}
//start of Dictionary on Inline image
int startInlineStream = 0;
final CommandParser parser = new CommandParser(stream);
final int streamSize = stream.length;
int dataPointer = 0;
int startCommand = 0;
int shapeCommandCount = 0;
PdfShape currentDrawShape = null;
if (parserOptions.useJavaFX()) {
final JavaFXSupport fxSupport = ExternalHandlers.getFXHandler();
if (fxSupport != null) {
currentDrawShape = fxSupport.getFXShape();
}
} else {
currentDrawShape = new SwingShape();
}
//setup textDecoder
final Tj textDecoder;
if (parserOptions.hasContentHandler()) {
textDecoder = new Tj(parserOptions, textAreas, textDirections, current, errorTracker);
} else {
textDecoder = new Tj(parserOptions, pdfData, isXMLExtraction, textAreas, textDirections, current, errorTracker);
textDecoder.setReturnText(returnText);
}
textDecoder.setStreamType(streamType);
if (statusBar != null && !parserOptions.renderDirectly()) {
statusBar.percentageDone = 0;
statusBar.resetStatus("stream");
}
/*
* loop to read stream and decode
*/
while (true) {
//allow user to request exit and fail page
if (errorTracker.checkForExitRequest(dataPointer, streamSize)) {
break;
}
if (statusBar != null && !parserOptions.renderDirectly()) {
statusBar.percentageDone = (90 * dataPointer) / streamSize;
}
dataPointer = parser.getCommandValues(dataPointer, tokenNumber);
final int commandID = parser.getCommandID();
//use negative flag to show commands found
if (dataPointer < 0) {
dataPointer = -dataPointer;
try {
/*
* call method to handle commands
*/
final int commandType = Cmd.getCommandType(commandID);
/*text commands first and all other
* commands if not found in first
**/
switch (commandType) {
case Cmd.TEXT_COMMAND:
if ((commandID == Cmd.EMC || commandID == Cmd.BDC || parserOptions.isLayerVisible()) && !getSamplingOnly && (renderText || textExtracted)) {
dataPointer = processTextToken(textDecoder, parser, commandID, startCommand, dataPointer);
}
break;
case Cmd.SHAPE_COMMAND:
if (!getSamplingOnly) {
processShapeCommands(parser, currentDrawShape, commandID);
shapeCommandCount++;
if (maxShapesAllowed > 0 && shapeCommandCount > maxShapesAllowed) {
final String errMessage = "[PDF] Shapes on page exceed limit set by JVM flag org.jpedal.maxShapeCount - value " + maxShapesAllowed;
parserOptions.tooManyShapes = true;
throw new PdfException(errMessage);
}
}
break;
case Cmd.SHADING_COMMAND:
// Internal tests can disable images to speed up conversion
if (System.getProperty("testsDisableImages") != null) {
break;
}
if (!getSamplingOnly && parserOptions.isRenderPage()) {
if (parserOptions.useJavaFX) {
if (!showFXShadingMessage) {
System.out.println("SH not implemented in JavaFX yet");
showFXShadingMessage = true;
}
} else {
SH.execute(parser.generateOpAsString(0, true), cache, gs,
isPrinting, parserOptions.getPageNumber(), currentPdfFile,
pageData, current);
}
}
break;
case Cmd.COLOR_COMMAND:
if (!getSamplingOnly) {
processColor(parser, commandID);
}
break;
case Cmd.GS_COMMAND:
processGScommands(parser, commandID);
//may have changed so read back and reset
if (commandID == Cmd.cm && textDecoder != null) {
multipleTJs = false;
}
break;
case Cmd.IMAGE_COMMAND:
if (commandID == Cmd.BI) {
startInlineStream = dataPointer;
} else {
PdfObject XObject = null;
int subtype = 1;
if (commandID == Cmd.Do) {
final String name = parser.generateOpAsString(0, true);
//byte[] rawData;
final byte[] XObjectData = cache.getXObjects(name);
if (XObjectData != null) {
XObject = PdfObjectFactory.getPDFObjectObjectFromRefOrDirect(new XObject("1 0 R"), currentPdfFile.getObjectReader(), XObjectData, PdfDictionary.XObject);
subtype = XObject.getParameterConstant(PdfDictionary.Subtype);
}
if (subtype == PdfDictionary.Form) {
if (formLevel > 100 && dataPointer == lastDataPointer) {
//catch for odd files like 11jun/results.pdf
} else {
lastDataPointer = dataPointer;
if (!parserOptions.isLayerVisible() || (layers != null && !layers.isVisible(XObject)) || XObject == null) {
//
} else {
XFormDecoder.processXForm(this, dataPointer, XObject, parserOptions.defaultClip, parser);
}
//THIS TURNS OUT TO BE A BAD IDEA!!!!!
//breaks [1719] P012-209_001 Projektplan-Projekt-Plan Nord.pdf
//if lots of objects in play turn back to ref to save memory
// if(1==2 && rawData!=null && cache.getXObjectCount()>30){
// String ref=XObject.getObjectRefAsString();
//
// cache.resetXObject(name,ref,rawData);
// XObject=null;
//
// }
}
}
}
if (subtype != PdfDictionary.Form) {
final ImageDecoder imageDecoder;
if (commandID != Cmd.Do) {
imageDecoder = new ID(imageCount, currentPdfFile, errorTracker, customImageHandler, objectStoreStreamRef, pdfImages, pageData, imagesInFile);
} else {
imageDecoder = new DO(imageCount, currentPdfFile, errorTracker, customImageHandler, objectStoreStreamRef, pdfImages, pageData, imagesInFile);
}
imageDecoder.setRes(cache);
imageDecoder.setGS(gs);
imageDecoder.setSamplingOnly(getSamplingOnly);
imageDecoder.setStreamType(streamType);
//imageDecoder.setName(fileName);
imageDecoder.setMultiplyer(multiplyer);
//imageDecoder.setFloatValue(SamplingUsed, samplingUsed);
//imageDecoder.setFileHandler(currentPdfFile);
imageDecoder.setRenderer(current);
parserOptions.isPrinting(isPrinting);
imageDecoder.setParams(parserOptions);
if (commandID == Cmd.Do) {
//size test to remove odd lines in abacus file abacus/EP_Print_Post_Suisse_ID_120824.pdf
if (XObject == null || !parserOptions.isLayerVisible() || (layers != null && !layers.isVisible(XObject)) || (gs.CTM != null && gs.CTM[1][1] == 0 && gs.CTM[1][0] != 0 && Math.abs(gs.CTM[1][0]) < 0.2)) {
//ignore
} else {
String name = parser.generateOpAsString(0, true);
//name is not unique if in form so we add form level to separate out
if (formLevel > 0) {
name = formName + '_' + formLevel + '_' + name;
}
dataPointer = imageDecoder.processImage(name, dataPointer, XObject);
}
} else if (parserOptions.isLayerVisible()) {
dataPointer = imageDecoder.processImage(dataPointer, startInlineStream, parser.getStream(), tokenNumber);
}
imageCount++;
imagesInFile = imageDecoder.getImagesInFile();
}
}
break;
case Cmd.T3_COMMAND:
if (!getSamplingOnly && (renderText || textExtracted)) {
if (t3Decoder == null) {
t3Decoder = new T3Decoder();
}
t3Decoder.setCommands(parser);
t3Decoder.setCommands(parser);
t3Decoder.processToken(commandID);
}
break;
}
} catch (final Exception e) {
LogWriter.writeLog("[PDF] " + e + " Processing token >" + Cmd.getCommandAsString(commandID) + "<>" + parserOptions.getFileName() + " <" + parserOptions.getPageNumber());
//only exit if no issue with stream
if (!isDataValid) {
dataPointer = streamSize;
}
} catch (final OutOfMemoryError ee) {
errorTracker.addPageFailureMessage("Memory error decoding token stream " + ee);
LogWriter.writeLog("[MEMORY] Memory error - trying to recover");
}
//save for next command
startCommand = dataPointer;
//reset array of trailing values
parser.reset();
//increase pointer
incrementTokenNumber();
}
//break at end
if (streamSize <= dataPointer) {
break;
}
}
if (!parserOptions.renderDirectly() && statusBar != null) {
statusBar.percentageDone = 100;
}
//pick up TextDecoder values
isTTHintingRequired = textDecoder.isTTHintingRequired();
if (returnText) {
return lastTextValue;
} else {
return "";
}
}
void processColor(final CommandParser parser, final int commandID) {
if (commandID != Cmd.SCN && commandID != Cmd.scn && commandID != Cmd.SC && commandID != Cmd.sc) {
current.writeCustom(DynamicVectorRenderer.RESET_COLORSPACE, null);
}
switch (commandID) {
case Cmd.cs:
CS.execute(true, parser.generateOpAsString(0, true), gs, cache, currentPdfFile, isPrinting);
break;
case Cmd.CS:
CS.execute(false, parser.generateOpAsString(0, true), gs, cache, currentPdfFile, isPrinting);
break;
case Cmd.rg:
RG.execute(true, gs, parser, cache);
break;
case Cmd.RG:
RG.execute(false, gs, parser, cache);
break;
case Cmd.SCN:
SCN.execute(false, gs, parser, cache);
break;
case Cmd.scn:
SCN.execute(true, gs, parser, cache);
break;
case Cmd.SC:
SCN.execute(false, gs, parser, cache);
break;
case Cmd.sc:
SCN.execute(true, gs, parser, cache);
break;
case Cmd.g:
G.execute(true, gs, parser, cache);
break;
case Cmd.G:
G.execute(false, gs, parser, cache);
break;
case Cmd.k:
K.execute(true, gs, parser, cache);
break;
case Cmd.K:
K.execute(false, gs, parser, cache);
break;
}
}
private void processGScommands(final CommandParser parser, final int commandID) {
switch (commandID) {
case Cmd.cm:
CM.execute(gs, parser);
break;
case Cmd.q:
gs = Q.execute(gs, true, graphicsStates, current);
break;
case Cmd.Q:
gs = Q.execute(gs, false, graphicsStates, current);
break;
case Cmd.gs:
if (!getSamplingOnly) {
final String key = parser.generateOpAsString(0, true);
final byte[] data = cache.GraphicsStates.get(key);
final PdfObject GS = getExtStateObjectFromRefOrDirect(currentPdfFile, data);
gs.setMode(GS);
final int blendMode = gs.getBMValue();
current.setGraphicsState(GraphicsState.FILL, gs.getAlpha(GraphicsState.FILL), blendMode);
current.setGraphicsState(GraphicsState.STROKE, gs.getAlpha(GraphicsState.STROKE), blendMode);
currentBlendMode = blendMode;
}
break;
}
}
private void processShapeCommands(final CommandParser parser, final PdfShape currentDrawShape, final int commandID) {
switch (commandID) {
case Cmd.B:
if (!removeRenderImages) {
final Shape currentShape = B.execute(false, false, gs, formLevel, currentDrawShape, current, parserOptions);
//track for user if required
if (currentShape != null) {
final ShapeTracker customShapeTracker = parserOptions.getCustomShapeTraker();
if (customShapeTracker != null) {
customShapeTracker.addShape(tokenNumber, Cmd.B, currentShape, gs.nonstrokeColorSpace.getColor(), gs.strokeColorSpace.getColor());
}
}
}
break;
case Cmd.b:
if (!removeRenderImages) {
final Shape currentShape = B.execute(false, true, gs, formLevel, currentDrawShape, current, parserOptions);
//track for user if required
if (currentShape != null) {
final ShapeTracker customShapeTracker = parserOptions.getCustomShapeTraker();
if (customShapeTracker != null) {
customShapeTracker.addShape(tokenNumber, Cmd.b, currentShape, gs.nonstrokeColorSpace.getColor(), gs.strokeColorSpace.getColor());
}
}
}
break;
case Cmd.bstar:
if (!removeRenderImages) {
final Shape currentShape = B.execute(true, true, gs, formLevel, currentDrawShape, current, parserOptions);
//track for user if required
if (currentShape != null) {
final ShapeTracker customShapeTracker = parserOptions.getCustomShapeTraker();
if (customShapeTracker != null) {
customShapeTracker.addShape(tokenNumber, Cmd.bstar, currentShape, gs.nonstrokeColorSpace.getColor(), gs.strokeColorSpace.getColor());
}
}
}
break;
case Cmd.Bstar:
if (!removeRenderImages) {
final Shape currentShape = B.execute(true, false, gs, formLevel, currentDrawShape, current, parserOptions);
//track for user if required
if (currentShape != null) {
final ShapeTracker customShapeTracker = parserOptions.getCustomShapeTraker();
if (customShapeTracker != null) {
customShapeTracker.addShape(tokenNumber, Cmd.Bstar, currentShape, gs.nonstrokeColorSpace.getColor(), gs.strokeColorSpace.getColor());
}
}
}
break;
case Cmd.c:
final float x3 = parser.parseFloat(1);
final float y3 = parser.parseFloat(0);
final float x2 = parser.parseFloat(3);
final float y2 = parser.parseFloat(2);
final float x = parser.parseFloat(5);
final float y = parser.parseFloat(4);
currentDrawShape.addBezierCurveC(x, y, x2, y2, x3, y3);
break;
case Cmd.d:
D.execute(parser, gs);
break;
case Cmd.F:
if (!removeRenderImages) {
F.execute(tokenNumber, false, formLevel, currentDrawShape, gs, cache, currentPdfFile, current, parserOptions, multiplyer);
}
break;
case Cmd.f:
if (!removeRenderImages) {
F.execute(tokenNumber, false, formLevel, currentDrawShape, gs, cache, currentPdfFile, current, parserOptions, multiplyer);
}
break;
case Cmd.Fstar:
if (!removeRenderImages) {
F.execute(tokenNumber, true, formLevel, currentDrawShape, gs, cache, currentPdfFile, current, parserOptions, multiplyer);
}
break;
case Cmd.fstar:
if (!removeRenderImages) {
F.execute(tokenNumber, true, formLevel, currentDrawShape, gs, cache, currentPdfFile, current, parserOptions, multiplyer);
}
break;
case Cmd.h:
currentDrawShape.closeShape();
break;
//case Cmd.i:
// I();
//break;
case Cmd.J:
J.execute(false, parser.parseInt(), gs);
break;
case Cmd.j:
J.execute(true, parser.parseInt(), gs);
break;
case Cmd.l:
currentDrawShape.lineTo(parser.parseFloat(1), parser.parseFloat(0));
break;
case Cmd.M:
gs.setMitreLimit((int) (parser.parseFloat(0)));
break;
case Cmd.m:
currentDrawShape.setClip(false);
currentDrawShape.moveTo(parser.parseFloat(1), parser.parseFloat(0));
break;
case Cmd.n:
N.execute(currentDrawShape, gs, formLevel, parserOptions.defaultClip, parserOptions, current, pageData);
break;
case Cmd.re:
currentDrawShape.appendRectangle(parser.parseFloat(3), parser.parseFloat(2), parser.parseFloat(1), parser.parseFloat(0));
break;
case Cmd.S:
if (!removeRenderImages) {
final Shape currentShape = S.execute(false, gs, currentDrawShape, current, parserOptions);
if (currentShape != null) {
final ShapeTracker customShapeTracker = parserOptions.getCustomShapeTraker();
if (customShapeTracker != null) {
customShapeTracker.addShape(tokenNumber, Cmd.S, currentShape, gs.nonstrokeColorSpace.getColor(), gs.strokeColorSpace.getColor());
}
}
}
break;
case Cmd.s:
if (!removeRenderImages) {
final Shape currentShape = S.execute(true, gs, currentDrawShape, current, parserOptions);
//track for user if required
if (currentShape != null) {
final ShapeTracker customShapeTracker = parserOptions.getCustomShapeTraker();
if (customShapeTracker != null) {
customShapeTracker.addShape(tokenNumber, Cmd.s, currentShape, gs.nonstrokeColorSpace.getColor(), gs.strokeColorSpace.getColor());
}
}
}
break;
case Cmd.v:
currentDrawShape.addBezierCurveV(parser.parseFloat(3), parser.parseFloat(2), parser.parseFloat(1), parser.parseFloat(0));
break;
case Cmd.w:
gs.setLineWidth(parser.parseFloat(0));
break;
case Cmd.Wstar: //set Winding rule
currentDrawShape.setEVENODDWindingRule();
currentDrawShape.setClip(true);
break;
case Cmd.W:
currentDrawShape.setNONZEROWindingRule();
currentDrawShape.setClip(true);
break;
case Cmd.y:
currentDrawShape.addBezierCurveY(parser.parseFloat(3), parser.parseFloat(2), parser.parseFloat(1), parser.parseFloat(0));
break;
}
}
/**
* return boolean flags with appropriate ket
*/
public boolean getBooleanValue(final int key) {
switch (key) {
case ValueTypes.EmbeddedFonts:
return pdfFontFactory.hasEmbeddedFonts();
case ValueTypes.StructuredContent:
if (contentHandler == null) {
return false;
} else {
return contentHandler.hasContent();
}
case DecodeStatus.PageDecodingSuccessful:
return errorTracker.ispageSuccessful();
case DecodeStatus.NonEmbeddedCIDFonts:
return pdfFontFactory.hasNonEmbeddedCIDFonts();
case DecodeStatus.ImagesProcessed:
return parserOptions.imagesProcessedFully;
case DecodeStatus.TooManyShapes:
return parserOptions.tooManyShapes;
case DecodeStatus.YCCKImages:
return parserOptions.hasYCCKimages;
case DecodeStatus.TTHintingRequired:
return isTTHintingRequired;
default:
throw new RuntimeException("Unknown value " + key);
}
}
public void dispose() {
if (pdfData != null) {
this.pdfData.dispose();
}
//this.pageLines=null;
}
public void setIntValue(final int key, final int value) {
switch (key) {
case ValueTypes.PageNum:
parserOptions.setPageNumber(value);
break;
/*
* tells program to try and use Java's font printing if possible
* as work around for issue with PCL printing
*/
case ValueTypes.TextPrint:
parserOptions.setTextPrint(value);
break;
}
}
public void setXMLExtraction(final boolean isXMLExtraction) {
this.isXMLExtraction = isXMLExtraction;
}
public void setParameters(final boolean isPageContent, final boolean renderPage, final int renderMode, final int extractionMode, final boolean isPrinting, final boolean useJavaFX) {
parserOptions.init(isPageContent, renderPage, renderMode, extractionMode, isPrinting, useJavaFX);
/*
* flags
*/
renderText = renderPage && (renderMode & PdfDecoderInt.RENDERTEXT) == PdfDecoderInt.RENDERTEXT;
textExtracted = (extractionMode & PdfDecoderInt.TEXT) == PdfDecoderInt.TEXT;
textColorExtracted = (extractionMode & PdfDecoderInt.TEXTCOLOR) == PdfDecoderInt.TEXTCOLOR;
removeRenderImages = renderPage && (renderMode & PdfDecoderInt.REMOVE_RENDERSHAPES) == PdfDecoderInt.REMOVE_RENDERSHAPES;
}
public void setFormLevel(final int value) {
formLevel = value;
}
/**
* process each token and add to text or decode if not known command, place
* in array (may be operand which is later used by command)
*/
private int processTextToken(final Tj textDecoder, final CommandParser parser, final int commandID, int startCommand, final int dataPointer) {
textDecoder.setGS(gs);
final TextState currentTextState = gs.getTextState();
if (commandID == Cmd.BT && parserOptions.isRenderPage()) {
//save for later and set TR
current.drawClip(gs, parserOptions.defaultClip, true);
current.drawTR(GraphicsState.FILL);
}
if (commandID == Cmd.Tj || commandID == Cmd.TJ || commandID == Cmd.quote || commandID == Cmd.doubleQuote) {
if (currentTextState.hasFontChanged() && currentTextState.getTfs() != 0) { //avoid text which does not appear as zero size
//switch to correct font
final String fontID = currentTextState.getFontID();
final PdfFont restoredFont = FontResolver.resolveFont(gs, this, fontID, pdfFontFactory, cache);
if (restoredFont != null) {
currentFontData = restoredFont;
}
}
if (currentFontData == null) {
currentFontData = new PdfFont(currentPdfFile);
//use name for poss mappings (ie Helv)
currentFontData.getGlyphData().logicalfontName = StandardFonts.expandName(currentTextState.getFontID());
}
if (currentTextState.hasFontChanged()) {
currentTextState.setFontChanged(false);
}
}
switch (commandID) {
case Cmd.BMC:
parserOptions.setLayerLevel(parserOptions.getLayerLevel() + 1);
//flag so we can next values
if (parserOptions.isLayerVisible()) {
parserOptions.getLayerVisibility().add(parserOptions.getLayerLevel());
}
if (contentHandler != null) {
contentHandler.BMC(parser.generateOpAsString(0, false));
}
break;
case Cmd.BDC:
final PdfObject BDCobj = BDC.execute(startCommand, dataPointer, parser.getStream(),
parser.generateOpAsString(0, false), gs, currentPdfFile, current, parserOptions);
//work around for unbalanced clip
if (BDCobj.getClip() != null) {
BDCDepth = graphicsStates.getDepth();
} else {
BDCDepth = -1;
}
//track setting and use in preference for text extraction
textDecoder.setActualText(BDCobj.getTextStreamValue(PdfDictionary.ActualText));
if (contentHandler != null) {
contentHandler.BDC(BDCobj);
}
break;
case Cmd.BT:
currentTextState.resetTm();
break;
case Cmd.EMC:
textDecoder.setActualText(null);
if (contentHandler != null) {
contentHandler.EMC();
}
//balance stack inside tagged commands
if (parserOptions.getLayerLevel() == 1 && BDCDepth != -1 && BDCDepth != graphicsStates.getDepth()) {
graphicsStates.correctDepth(0, gs, current);
}
BDCDepth = -1;
EMC.execute(current, gs, parserOptions);
break;
case Cmd.ET:
current.writeCustom(DynamicVectorRenderer.RESET_COLORSPACE, null);
if (gs.getTextRenderType() == GraphicsState.CLIPTEXT) {
current.drawClip(gs, null, false);
}
break;
case Cmd.DP:
if (contentHandler != null) {
final MCObject obj = new MCObject(parser.generateOpAsString(0, false));
currentPdfFile.readObject(obj);
contentHandler.DP(obj);
}
break;
case Cmd.Tf:
currentTextState.TF(parser.parseFloat(0), (parser.generateOpAsString(1, true)));
break;
case Cmd.Tc:
currentTextState.setCharacterSpacing(parser.parseFloat(0));
break;
case Cmd.TD:
TD.execute(false, parser.parseFloat(1), parser.parseFloat(0), currentTextState);
multipleTJs = false;
break;
case Cmd.Td:
TD.execute(true, parser.parseFloat(1), parser.parseFloat(0), currentTextState);
multipleTJs = false;
break;
case Cmd.Tj:
if (currentTextState.getTfs() != 0) { //avoid zero size text
lastTextValue = textDecoder.TJ(currentTextState, currentFontData, parser.getStream(), startCommand, dataPointer, multipleTJs);
}
multipleTJs = true; //flag will be reset by Td/Tj/T* if move takes place.
break;
case Cmd.TJ:
lastTextValue = textDecoder.TJ(currentTextState, currentFontData, parser.getStream(), startCommand, dataPointer, multipleTJs);
multipleTJs = true; //flag will be reset by Td/Tj/T* if move takes place.
break;
case Cmd.quote:
TD.relativeMove(0, -currentTextState.getLeading(), currentTextState);
multipleTJs = false;
lastTextValue = textDecoder.TJ(currentTextState, currentFontData, parser.getStream(), startCommand, dataPointer, multipleTJs);
multipleTJs = true; //flag will be reset by Td/Tj/T* if move takes place.
break;
case Cmd.doubleQuote:
final byte[] characterStream = parser.getStream();
currentTextState.setCharacterSpacing(parser.parseFloat(1));
currentTextState.setWordSpacing(parser.parseFloat(2));
TD.relativeMove(0, -currentTextState.getLeading(), currentTextState);
multipleTJs = false;
//we can have values which are not accounted for before stream so rollon so we ignore
while (characterStream[startCommand] != '(' && characterStream[startCommand] != '<' && characterStream[startCommand] != '[') {
startCommand++;
}
lastTextValue = textDecoder.TJ(currentTextState, currentFontData, characterStream, startCommand, dataPointer, multipleTJs);
multipleTJs = true; //flag will be reset by Td/Tj/T* if move takes place.
break;
case Cmd.Tm:
//set Tm matrix
currentTextState.Tm[0][0] = parser.parseFloat(5);
currentTextState.Tm[0][1] = parser.parseFloat(4);
currentTextState.Tm[0][2] = 0;
currentTextState.Tm[1][0] = parser.parseFloat(3);
currentTextState.Tm[1][1] = parser.parseFloat(2);
currentTextState.Tm[1][2] = 0;
currentTextState.Tm[2][0] = parser.parseFloat(1);
currentTextState.Tm[2][1] = parser.parseFloat(0);
currentTextState.Tm[2][2] = 1;
//keep position in case we need
currentTextState.setTMAtLineStart();
multipleTJs = false;
break;
case Cmd.Tstar:
TD.relativeMove(0, -currentTextState.getLeading(), currentTextState);
multipleTJs = false;
break;
case Cmd.Tr:
final int value = TR.execute(parser.parseInt(), gs);
if (parserOptions.isRenderPage() && !parserOptions.renderDirectly()) {
current.drawTR(value);
}
break;
case Cmd.Ts:
currentTextState.setTextRise(parser.parseFloat(0));
break;
case Cmd.Tw:
currentTextState.setWordSpacing(parser.parseFloat(0));
break;
case Cmd.Tz:
currentTextState.setHorizontalScaling(parser.parseFloat(0) / 100);
break;
case Cmd.TL:
currentTextState.setLeading(parser.parseFloat(0));
break;
}
return dataPointer;
}
public PdfObjectCache getObjectCache() {
return cache;
}
public int getBlendMode() {
return currentBlendMode;
}
public void incrementTokenNumber() {
tokenNumber++;
current.setValue(DynamicVectorRenderer.TOKEN_NUMBER, tokenNumber);
}
private static ExtGStateObject getExtStateObjectFromRefOrDirect(final PdfObjectReader currentPdfFile, final byte[] data) {
final ExtGStateObject obj = new ExtGStateObject(new String(data));
if (data[0] == '<') {
obj.setStatus(PdfObject.UNDECODED_DIRECT);
} else {
obj.setStatus(PdfObject.UNDECODED_REF);
}
obj.setUnresolvedData(data, PdfDictionary.ExtGState);
final ObjectDecoder objectDecoder = new ObjectDecoder(currentPdfFile.getObjectReader());
objectDecoder.checkResolved(obj);
return obj;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy