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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, see http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
of this program must display Appropriate Legal Notices, as required under
Section 5 of the GNU Affero General Public License.
In accordance with Section 7(b) of the GNU Affero General Public License,
a covered work must retain the producer line in every PDF that is created
or manipulated using iText.
You can be released from the requirements of the license by purchasing
a commercial license. Buying such a license is mandatory as soon as you
develop commercial activities involving the iText software without
disclosing the source code of your own applications.
These activities include: offering paid services to customers as an ASP,
serving PDFs on the fly in a web application, shipping iText with a closed
source product.
For more information, please contact iText Software Corp. at this
address: [email protected]
*/
package com.itextpdf.kernel.pdf.canvas.parser;
import com.itextpdf.io.logs.IoLogMessageConstant;
import com.itextpdf.io.source.PdfTokenizer;
import com.itextpdf.io.source.RandomAccessFileOrArray;
import com.itextpdf.io.source.RandomAccessSourceFactory;
import com.itextpdf.commons.utils.MessageFormatUtil;
import com.itextpdf.kernel.logs.KernelLogMessageConstant;
import com.itextpdf.kernel.exceptions.PdfException;
import com.itextpdf.kernel.colors.CalGray;
import com.itextpdf.kernel.colors.CalRgb;
import com.itextpdf.kernel.colors.Color;
import com.itextpdf.kernel.colors.DeviceCmyk;
import com.itextpdf.kernel.colors.DeviceGray;
import com.itextpdf.kernel.colors.DeviceN;
import com.itextpdf.kernel.colors.DeviceRgb;
import com.itextpdf.kernel.colors.IccBased;
import com.itextpdf.kernel.colors.Indexed;
import com.itextpdf.kernel.colors.Lab;
import com.itextpdf.kernel.colors.PatternColor;
import com.itextpdf.kernel.colors.Separation;
import com.itextpdf.kernel.exceptions.KernelExceptionMessageConstant;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.geom.Matrix;
import com.itextpdf.kernel.geom.NoninvertibleTransformException;
import com.itextpdf.kernel.geom.Path;
import com.itextpdf.kernel.pdf.PdfArray;
import com.itextpdf.kernel.pdf.PdfDictionary;
import com.itextpdf.kernel.pdf.PdfIndirectReference;
import com.itextpdf.kernel.pdf.PdfLiteral;
import com.itextpdf.kernel.pdf.PdfName;
import com.itextpdf.kernel.pdf.PdfNumber;
import com.itextpdf.kernel.pdf.PdfObject;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfResources;
import com.itextpdf.kernel.pdf.PdfStream;
import com.itextpdf.kernel.pdf.PdfString;
import com.itextpdf.kernel.pdf.canvas.CanvasTag;
import com.itextpdf.kernel.pdf.canvas.PdfCanvasConstants;
import com.itextpdf.kernel.pdf.canvas.PdfCanvasConstants.FillingRule;
import com.itextpdf.kernel.pdf.canvas.parser.data.AbstractRenderInfo;
import com.itextpdf.kernel.pdf.canvas.parser.data.ClippingPathInfo;
import com.itextpdf.kernel.pdf.canvas.parser.data.IEventData;
import com.itextpdf.kernel.pdf.canvas.parser.data.ImageRenderInfo;
import com.itextpdf.kernel.pdf.canvas.parser.data.PathRenderInfo;
import com.itextpdf.kernel.pdf.canvas.parser.data.TextRenderInfo;
import com.itextpdf.kernel.pdf.canvas.parser.listener.IEventListener;
import com.itextpdf.kernel.pdf.canvas.parser.util.PdfCanvasParser;
import com.itextpdf.kernel.pdf.colorspace.PdfCieBasedCs;
import com.itextpdf.kernel.pdf.colorspace.PdfColorSpace;
import com.itextpdf.kernel.pdf.colorspace.PdfPattern;
import com.itextpdf.kernel.pdf.colorspace.PdfSpecialCs;
import com.itextpdf.kernel.pdf.extgstate.PdfExtGState;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.lang.ref.WeakReference;
import java.util.*;
/**
* Processor for a PDF content stream.
*/
public class PdfCanvasProcessor {
public static final String DEFAULT_OPERATOR = "DefaultOperator";
/**
* Listener that will be notified of render events
*/
protected final IEventListener eventListener;
/**
* Cache supported events in case the user's {@link IEventListener#getSupportedEvents()} method is not very efficient
*/
protected final Set supportedEvents;
protected Path currentPath = new Path();
/**
* Indicates whether the current clipping path should be modified by
* intersecting it with the current path.
*/
protected boolean isClip;
/**
* Specifies the filling rule which should be applied while calculating
* new clipping path.
*/
protected int clippingRule;
/**
* A map with all supported operators (PDF syntax).
*/
private Map operators;
/**
* Resources for the content stream.
* Current resources are always at the top of the stack.
* Stack is needed in case if some "inner" content stream with it's own resources
* is encountered (like Form XObject).
*/
private Stack resourcesStack;
/**
* Stack keeping track of the graphics state.
*/
private final Stack gsStack = new Stack<>();
private Matrix textMatrix;
private Matrix textLineMatrix;
/**
* A map with all supported XObject handlers
*/
private Map xobjectDoHandlers;
/**
* The font cache
*/
private Map> cachedFonts = new HashMap<>();
/**
* A stack containing marked content info.
*/
private Stack markedContentStack = new Stack<>();
/**
* Creates a new PDF Content Stream Processor that will send its output to the
* designated render listener.
*
* @param eventListener the {@link IEventListener} that will receive rendering notifications
*/
public PdfCanvasProcessor(IEventListener eventListener) {
this.eventListener = eventListener;
this.supportedEvents = eventListener.getSupportedEvents();
operators = new HashMap<>();
populateOperators();
xobjectDoHandlers = new HashMap<>();
populateXObjectDoHandlers();
reset();
}
/**
* Creates a new PDF Content Stream Processor that will send its output to the
* designated render listener.
* Also allows registration of custom IContentOperators that can influence
* how (and whether or not) the PDF instructions will be parsed.
*
* @param eventListener the {@link IEventListener} that will receive rendering notifications
* @param additionalContentOperators an optional map of custom {@link IContentOperator}s for rendering instructions
*/
public PdfCanvasProcessor(IEventListener eventListener, Map additionalContentOperators) {
this(eventListener);
for (Map.Entry entry : additionalContentOperators.entrySet()) {
registerContentOperator(entry.getKey(), entry.getValue());
}
}
/**
* Registers a Do handler that will be called when Do for the provided XObject subtype is encountered during content processing.
*
* If you register a handler, it is a very good idea to pass the call on to the existing registered handler (returned by this call), otherwise you
* may inadvertently change the internal behavior of the processor.
*
* @param xobjectSubType the XObject subtype this handler will process, or PdfName.DEFAULT for a catch-all handler
* @param handler the handler that will receive notification when the Do operator for the specified subtype is encountered
* @return the existing registered handler, if any
*/
public IXObjectDoHandler registerXObjectDoHandler(PdfName xobjectSubType, IXObjectDoHandler handler) {
return xobjectDoHandlers.put(xobjectSubType, handler);
}
/**
* Registers a content operator that will be called when the specified operator string is encountered during content processing.
*
* If you register an operator, it is a very good idea to pass the call on to the existing registered operator (returned by this call), otherwise you
* may inadvertently change the internal behavior of the processor.
*
* @param operatorString the operator id, or DEFAULT_OPERATOR for a catch-all operator
* @param operator the operator that will receive notification when the operator is encountered
* @return the existing registered operator, if any
*/
public IContentOperator registerContentOperator(String operatorString, IContentOperator operator) {
return operators.put(operatorString, operator);
}
/**
* Gets the {@link java.util.Collection} containing all the registered operators strings.
*
* @return {@link java.util.Collection} containing all the registered operators strings.
*/
public Collection getRegisteredOperatorStrings() {
return new ArrayList(operators.keySet());
}
/**
* Resets the graphics state stack, matrices and resources.
*/
public void reset() {
gsStack.removeAllElements();
gsStack.push(new ParserGraphicsState());
textMatrix = null;
textLineMatrix = null;
resourcesStack = new Stack<>();
isClip = false;
currentPath = new Path();
}
/**
* Gets the current {@link ParserGraphicsState}
*
* @return the current {@link ParserGraphicsState}
*/
public ParserGraphicsState getGraphicsState() {
return gsStack.peek();
}
/**
* Processes PDF syntax.
* Note: If you re-use a given {@link PdfCanvasProcessor}, you must call {@link PdfCanvasProcessor#reset()}
*
* @param contentBytes the bytes of a content stream
* @param resources the resources of the content stream. Must not be null.
*/
public void processContent(byte[] contentBytes, PdfResources resources) {
if (resources == null) {
throw new PdfException(KernelExceptionMessageConstant.RESOURCES_CANNOT_BE_NULL);
}
this.resourcesStack.push(resources);
PdfTokenizer tokeniser = new PdfTokenizer(new RandomAccessFileOrArray(new RandomAccessSourceFactory().createSource(contentBytes)));
PdfCanvasParser ps = new PdfCanvasParser(tokeniser, resources);
List operands = new ArrayList<>();
try {
while (ps.parse(operands).size() > 0) {
PdfLiteral operator = (PdfLiteral) operands.get(operands.size() - 1);
invokeOperator(operator, operands);
}
} catch (IOException e) {
throw new PdfException(KernelExceptionMessageConstant.CANNOT_PARSE_CONTENT_STREAM, e);
}
this.resourcesStack.pop();
}
/**
* Processes PDF syntax.
*
* Note: If you re-use a given {@link PdfCanvasProcessor}, you must call {@link PdfCanvasProcessor#reset()}
*
* @param page the page to process
*/
public void processPageContent(PdfPage page) {
initClippingPath(page);
ParserGraphicsState gs = getGraphicsState();
eventOccurred(new ClippingPathInfo(gs, gs.getClippingPath(), gs.getCtm()), EventType.CLIP_PATH_CHANGED);
processContent(page.getContentBytes(), page.getResources());
}
/**
* Accessor method for the {@link IEventListener} object maintained in this class.
* Necessary for implementing custom ContentOperator implementations.
*
* @return the renderListener
*/
public IEventListener getEventListener() {
return eventListener;
}
/**
* Loads all the supported graphics and text state operators in a map.
*/
protected void populateOperators() {
registerContentOperator(DEFAULT_OPERATOR, new IgnoreOperator());
registerContentOperator("q", new PushGraphicsStateOperator());
registerContentOperator("Q", new PopGraphicsStateOperator());
registerContentOperator("cm", new ModifyCurrentTransformationMatrixOperator());
registerContentOperator("Do", new DoOperator());
registerContentOperator("BMC", new BeginMarkedContentOperator());
registerContentOperator("BDC", new BeginMarkedContentDictionaryOperator());
registerContentOperator("EMC", new EndMarkedContentOperator());
if (supportedEvents == null || supportedEvents.contains(EventType.RENDER_TEXT)
|| supportedEvents.contains(EventType.RENDER_PATH)
|| supportedEvents.contains(EventType.CLIP_PATH_CHANGED)) {
registerContentOperator("g", new SetGrayFillOperator());
registerContentOperator("G", new SetGrayStrokeOperator());
registerContentOperator("rg", new SetRGBFillOperator());
registerContentOperator("RG", new SetRGBStrokeOperator());
registerContentOperator("k", new SetCMYKFillOperator());
registerContentOperator("K", new SetCMYKStrokeOperator());
registerContentOperator("cs", new SetColorSpaceFillOperator());
registerContentOperator("CS", new SetColorSpaceStrokeOperator());
registerContentOperator("sc", new SetColorFillOperator());
registerContentOperator("SC", new SetColorStrokeOperator());
registerContentOperator("scn", new SetColorFillOperator());
registerContentOperator("SCN", new SetColorStrokeOperator());
registerContentOperator("gs", new ProcessGraphicsStateResourceOperator());
}
if (supportedEvents == null || supportedEvents.contains(EventType.RENDER_IMAGE)) {
registerContentOperator("EI", new EndImageOperator());
}
if (supportedEvents == null || supportedEvents.contains(EventType.RENDER_TEXT)
|| supportedEvents.contains(EventType.BEGIN_TEXT)
|| supportedEvents.contains(EventType.END_TEXT)) {
registerContentOperator("BT", new BeginTextOperator());
registerContentOperator("ET", new EndTextOperator());
}
if (supportedEvents == null || supportedEvents.contains(EventType.RENDER_TEXT)) {
SetTextCharacterSpacingOperator tcOperator = new SetTextCharacterSpacingOperator();
registerContentOperator("Tc", tcOperator);
SetTextWordSpacingOperator twOperator = new SetTextWordSpacingOperator();
registerContentOperator("Tw", twOperator);
registerContentOperator("Tz", new SetTextHorizontalScalingOperator());
SetTextLeadingOperator tlOperator = new SetTextLeadingOperator();
registerContentOperator("TL", tlOperator);
registerContentOperator("Tf", new SetTextFontOperator());
registerContentOperator("Tr", new SetTextRenderModeOperator());
registerContentOperator("Ts", new SetTextRiseOperator());
TextMoveStartNextLineOperator tdOperator = new TextMoveStartNextLineOperator();
registerContentOperator("Td", tdOperator);
registerContentOperator("TD", new TextMoveStartNextLineWithLeadingOperator(tdOperator, tlOperator));
registerContentOperator("Tm", new TextSetTextMatrixOperator());
TextMoveNextLineOperator tstarOperator = new TextMoveNextLineOperator(tdOperator);
registerContentOperator("T*", tstarOperator);
ShowTextOperator tjOperator = new ShowTextOperator();
registerContentOperator("Tj", tjOperator);
MoveNextLineAndShowTextOperator tickOperator = new MoveNextLineAndShowTextOperator(tstarOperator, tjOperator);
registerContentOperator("'", tickOperator);
registerContentOperator("\"", new MoveNextLineAndShowTextWithSpacingOperator(twOperator, tcOperator, tickOperator));
registerContentOperator("TJ", new ShowTextArrayOperator());
}
if (supportedEvents == null || supportedEvents.contains(EventType.CLIP_PATH_CHANGED)
|| supportedEvents.contains(EventType.RENDER_PATH)) {
registerContentOperator("w", new SetLineWidthOperator());
registerContentOperator("J", new SetLineCapOperator());
registerContentOperator("j", new SetLineJoinOperator());
registerContentOperator("M", new SetMiterLimitOperator());
registerContentOperator("d", new SetLineDashPatternOperator());
int fillStroke = PathRenderInfo.FILL | PathRenderInfo.STROKE;
registerContentOperator("m", new MoveToOperator());
registerContentOperator("l", new LineToOperator());
registerContentOperator("c", new CurveOperator());
registerContentOperator("v", new CurveFirstPointDuplicatedOperator());
registerContentOperator("y", new CurveFourhPointDuplicatedOperator());
registerContentOperator("h", new CloseSubpathOperator());
registerContentOperator("re", new RectangleOperator());
registerContentOperator("S", new PaintPathOperator(PathRenderInfo.STROKE, -1, false));
registerContentOperator("s", new PaintPathOperator(PathRenderInfo.STROKE, -1, true));
registerContentOperator("f", new PaintPathOperator(PathRenderInfo.FILL, PdfCanvasConstants.FillingRule.NONZERO_WINDING, false));
registerContentOperator("F", new PaintPathOperator(PathRenderInfo.FILL, PdfCanvasConstants.FillingRule.NONZERO_WINDING, false));
registerContentOperator("f*", new PaintPathOperator(PathRenderInfo.FILL, PdfCanvasConstants.FillingRule.EVEN_ODD, false));
registerContentOperator("B", new PaintPathOperator(fillStroke, PdfCanvasConstants.FillingRule.NONZERO_WINDING, false));
registerContentOperator("B*", new PaintPathOperator(fillStroke, PdfCanvasConstants.FillingRule.EVEN_ODD, false));
registerContentOperator("b", new PaintPathOperator(fillStroke, PdfCanvasConstants.FillingRule.NONZERO_WINDING, true));
registerContentOperator("b*", new PaintPathOperator(fillStroke, PdfCanvasConstants.FillingRule.EVEN_ODD, true));
registerContentOperator("n", new PaintPathOperator(PathRenderInfo.NO_OP, -1, false));
registerContentOperator("W", new ClipPathOperator(PdfCanvasConstants.FillingRule.NONZERO_WINDING));
registerContentOperator("W*", new ClipPathOperator(PdfCanvasConstants.FillingRule.EVEN_ODD));
}
}
/**
* Displays the current path.
*
* @param operation One of the possible combinations of {@link PathRenderInfo#STROKE}
* and {@link PathRenderInfo#FILL} values or
* {@link PathRenderInfo#NO_OP}
* @param rule Either {@link FillingRule#NONZERO_WINDING} or {@link FillingRule#EVEN_ODD}
* In case it isn't applicable pass any byte value.
*/
protected void paintPath(int operation, int rule) {
ParserGraphicsState gs = getGraphicsState();
PathRenderInfo renderInfo = new PathRenderInfo(this.markedContentStack, gs, currentPath, operation, rule, isClip, clippingRule);
eventOccurred(renderInfo, EventType.RENDER_PATH);
if (isClip) {
isClip = false;
gs.clip(currentPath, clippingRule);
eventOccurred(new ClippingPathInfo(gs, gs.getClippingPath(), gs.getCtm()), EventType.CLIP_PATH_CHANGED);
}
currentPath = new Path();
}
/**
* Invokes an operator.
*
* @param operator the PDF Syntax of the operator
* @param operands a list with operands
*/
protected void invokeOperator(PdfLiteral operator, List operands) {
IContentOperator op = operators.get(operator.toString());
if (op == null) {
op = operators.get(DEFAULT_OPERATOR);
}
op.invoke(this, operator, operands);
}
protected PdfStream getXObjectStream(PdfName xobjectName) {
PdfDictionary xobjects = getResources().getResource(PdfName.XObject);
return xobjects.getAsStream(xobjectName);
}
protected PdfResources getResources() {
return resourcesStack.peek();
}
protected void populateXObjectDoHandlers() {
registerXObjectDoHandler(PdfName.Default, new IgnoreXObjectDoHandler());
registerXObjectDoHandler(PdfName.Form, new FormXObjectDoHandler());
if (supportedEvents == null ||
supportedEvents.contains(EventType.RENDER_IMAGE)) {
registerXObjectDoHandler(PdfName.Image, new ImageXObjectDoHandler());
}
}
/**
* Creates a {@link PdfFont} object by a font dictionary. The font may have been cached in case
* it is an indirect object.
*
* @param fontDict the {@link PdfDictionary font dictionary} to create the font from
* @return the created font
*/
protected PdfFont getFont(PdfDictionary fontDict) {
if (fontDict.getIndirectReference() == null) {
return PdfFontFactory.createFont(fontDict);
} else {
int n = fontDict.getIndirectReference().getObjNumber();
WeakReference fontRef = cachedFonts.get(n);
PdfFont font = (PdfFont) (fontRef == null ? null : fontRef.get());
if (font == null) {
font = PdfFontFactory.createFont(fontDict);
cachedFonts.put(n, new WeakReference<>(font));
}
return font;
}
}
/**
* Add to the marked content stack
*
* @param tag the tag of the marked content
* @param dict the PdfDictionary associated with the marked content
*/
protected void beginMarkedContent(PdfName tag, PdfDictionary dict) {
markedContentStack.push(new CanvasTag(tag).setProperties(dict));
}
/**
* Remove the latest marked content from the stack. Keeps track of the BMC, BDC and EMC operators.
*/
protected void endMarkedContent() {
markedContentStack.pop();
}
/**
* Used to trigger beginTextBlock on the renderListener
*/
private void beginText() {
eventOccurred(null, EventType.BEGIN_TEXT);
}
/**
* Used to trigger endTextBlock on the renderListener
*/
private void endText() {
eventOccurred(null, EventType.END_TEXT);
}
/**
* This is a proxy to pass only those events to the event listener which are supported by it.
*
* @param data event data
* @param type event type
*/
protected void eventOccurred(IEventData data, EventType type) {
if (supportedEvents == null || supportedEvents.contains(type)) {
eventListener.eventOccurred(data, type);
}
if (data instanceof AbstractRenderInfo) {
((AbstractRenderInfo) data).releaseGraphicsState();
}
}
/**
* Displays text.
*
* @param string the text to display
*/
private void displayPdfString(PdfString string) {
TextRenderInfo renderInfo = new TextRenderInfo(string, getGraphicsState(), textMatrix, markedContentStack);
textMatrix = new Matrix(renderInfo.getUnscaledWidth(), 0).multiply(textMatrix);
eventOccurred(renderInfo, EventType.RENDER_TEXT);
}
/**
* Displays an XObject using the registered handler for this XObject's subtype
*
* @param resourceName the name of the XObject to retrieve from the resource dictionary
*/
private void displayXObject(PdfName resourceName) {
PdfStream xobjectStream = getXObjectStream(resourceName);
PdfName subType = xobjectStream.getAsName(PdfName.Subtype);
IXObjectDoHandler handler = xobjectDoHandlers.get(subType);
if (handler == null) {
handler = xobjectDoHandlers.get(PdfName.Default);
}
handler.handleXObject(this, this.markedContentStack, xobjectStream, resourceName);
}
private void displayImage(Stack canvasTagHierarchy, PdfStream imageStream, PdfName resourceName, boolean isInline) {
PdfDictionary colorSpaceDic = getResources().getResource(PdfName.ColorSpace);
ImageRenderInfo renderInfo = new ImageRenderInfo(canvasTagHierarchy, getGraphicsState(), getGraphicsState().getCtm(),
imageStream, resourceName, colorSpaceDic, isInline);
eventOccurred(renderInfo, EventType.RENDER_IMAGE);
}
/**
* Adjusts the text matrix for the specified adjustment value (see TJ operator in the PDF spec for information)
*
* @param tj the text adjustment
*/
private void applyTextAdjust(float tj) {
float adjustBy = -tj / 1000f * getGraphicsState().getFontSize() * (getGraphicsState().getHorizontalScaling() / 100f);
textMatrix = new Matrix(adjustBy, 0).multiply(textMatrix);
}
private void initClippingPath(PdfPage page) {
Path clippingPath = new Path();
clippingPath.rectangle(page.getCropBox());
getGraphicsState().setClippingPath(clippingPath);
}
/**
* A handler that implements operator (unregistered).
*/
private static class IgnoreOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
// ignore the operator
}
}
/**
* A handler that implements operator (TJ). For more information see Table 51 ISO-32000-1
*/
private static class ShowTextArrayOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfArray array = (PdfArray) operands.get(0);
float tj = 0;
for (PdfObject entryObj : array) {
if (entryObj instanceof PdfString) {
processor.displayPdfString((PdfString) entryObj);
tj = 0;
} else {
tj = ((PdfNumber) entryObj).floatValue();
processor.applyTextAdjust(tj);
}
}
}
}
/**
* A handler that implements operator ("). For more information see Table 51 ISO-32000-1
*/
private static class MoveNextLineAndShowTextWithSpacingOperator implements IContentOperator {
private final SetTextWordSpacingOperator setTextWordSpacing;
private final SetTextCharacterSpacingOperator setTextCharacterSpacing;
private final MoveNextLineAndShowTextOperator moveNextLineAndShowText;
/**
* Create new instance of this handler.
*
* @param setTextWordSpacing the handler for Tw operator
* @param setTextCharacterSpacing the handler for Tc operator
* @param moveNextLineAndShowText the handler for ' operator
*/
public MoveNextLineAndShowTextWithSpacingOperator(SetTextWordSpacingOperator setTextWordSpacing, SetTextCharacterSpacingOperator setTextCharacterSpacing, MoveNextLineAndShowTextOperator moveNextLineAndShowText) {
this.setTextWordSpacing = setTextWordSpacing;
this.setTextCharacterSpacing = setTextCharacterSpacing;
this.moveNextLineAndShowText = moveNextLineAndShowText;
}
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfNumber aw = (PdfNumber) operands.get(0);
PdfNumber ac = (PdfNumber) operands.get(1);
PdfString string = (PdfString) operands.get(2);
List twOperands = new ArrayList(1);
twOperands.add(0, aw);
setTextWordSpacing.invoke(processor, null, twOperands);
List tcOperands = new ArrayList(1);
tcOperands.add(0, ac);
setTextCharacterSpacing.invoke(processor, null, tcOperands);
List tickOperands = new ArrayList(1);
tickOperands.add(0, string);
moveNextLineAndShowText.invoke(processor, null, tickOperands);
}
}
/**
* A handler that implements operator ('). For more information see Table 51 ISO-32000-1
*/
private static class MoveNextLineAndShowTextOperator implements IContentOperator {
private final TextMoveNextLineOperator textMoveNextLine;
private final ShowTextOperator showText;
/**
* Creates the new instance of this handler
*
* @param textMoveNextLine the handler for T* operator
* @param showText the handler for Tj operator
*/
public MoveNextLineAndShowTextOperator(TextMoveNextLineOperator textMoveNextLine, ShowTextOperator showText) {
this.textMoveNextLine = textMoveNextLine;
this.showText = showText;
}
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
textMoveNextLine.invoke(processor, null, new ArrayList(0));
showText.invoke(processor, null, operands);
}
}
/**
* A handler that implements operator (Tj). For more information see Table 51 ISO-32000-1
*/
private static class ShowTextOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfString string = (PdfString) operands.get(0);
processor.displayPdfString(string);
}
}
/**
* A handler that implements operator (T*). For more information see Table 51 ISO-32000-1
*/
private static class TextMoveNextLineOperator implements IContentOperator {
private final TextMoveStartNextLineOperator moveStartNextLine;
public TextMoveNextLineOperator(TextMoveStartNextLineOperator moveStartNextLine) {
this.moveStartNextLine = moveStartNextLine;
}
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
List tdoperands = new ArrayList(2);
tdoperands.add(0, new PdfNumber(0));
tdoperands.add(1, new PdfNumber(-processor.getGraphicsState().getLeading()));
moveStartNextLine.invoke(processor, null, tdoperands);
}
}
/**
* A handler that implements operator (Tm). For more information see Table 51 ISO-32000-1
*/
private static class TextSetTextMatrixOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float a = ((PdfNumber) operands.get(0)).floatValue();
float b = ((PdfNumber) operands.get(1)).floatValue();
float c = ((PdfNumber) operands.get(2)).floatValue();
float d = ((PdfNumber) operands.get(3)).floatValue();
float e = ((PdfNumber) operands.get(4)).floatValue();
float f = ((PdfNumber) operands.get(5)).floatValue();
processor.textLineMatrix = new Matrix(a, b, c, d, e, f);
processor.textMatrix = processor.textLineMatrix;
}
}
/**
* A handler that implements operator (TD). For more information see Table 51 ISO-32000-1
*/
private static class TextMoveStartNextLineWithLeadingOperator implements IContentOperator {
private final TextMoveStartNextLineOperator moveStartNextLine;
private final SetTextLeadingOperator setTextLeading;
public TextMoveStartNextLineWithLeadingOperator(TextMoveStartNextLineOperator moveStartNextLine, SetTextLeadingOperator setTextLeading) {
this.moveStartNextLine = moveStartNextLine;
this.setTextLeading = setTextLeading;
}
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float ty = ((PdfNumber) operands.get(1)).floatValue();
List tlOperands = new ArrayList(1);
tlOperands.add(0, new PdfNumber(-ty));
setTextLeading.invoke(processor, null, tlOperands);
moveStartNextLine.invoke(processor, null, operands);
}
}
/**
* A handler that implements operator (Td). For more information see Table 51 ISO-32000-1
*/
private static class TextMoveStartNextLineOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float tx = ((PdfNumber) operands.get(0)).floatValue();
float ty = ((PdfNumber) operands.get(1)).floatValue();
Matrix translationMatrix = new Matrix(tx, ty);
processor.textMatrix = translationMatrix.multiply(processor.textLineMatrix);
processor.textLineMatrix = processor.textMatrix;
}
}
/**
* A handler that implements operator (Tf). For more information see Table 51 ISO-32000-1
*/
private static class SetTextFontOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfName fontResourceName = (PdfName) operands.get(0);
float size = ((PdfNumber) operands.get(1)).floatValue();
PdfDictionary fontsDictionary = processor.getResources().getResource(PdfName.Font);
PdfDictionary fontDict = fontsDictionary.getAsDictionary(fontResourceName);
PdfFont font = null;
font = processor.getFont(fontDict);
processor.getGraphicsState().setFont(font);
processor.getGraphicsState().setFontSize(size);
}
}
/**
* A handler that implements operator (Tr). For more information see Table 51 ISO-32000-1
*/
private static class SetTextRenderModeOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfNumber render = (PdfNumber) operands.get(0);
processor.getGraphicsState().setTextRenderingMode(render.intValue());
}
}
/**
* A handler that implements operator (Ts). For more information see Table 51 ISO-32000-1
*/
private static class SetTextRiseOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfNumber rise = (PdfNumber) operands.get(0);
processor.getGraphicsState().setTextRise(rise.floatValue());
}
}
/**
* A handler that implements operator (TL). For more information see Table 51 ISO-32000-1
*/
private static class SetTextLeadingOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfNumber leading = (PdfNumber) operands.get(0);
processor.getGraphicsState().setLeading(leading.floatValue());
}
}
/**
* A handler that implements operator (Tz). For more information see Table 51 ISO-32000-1
*/
private static class SetTextHorizontalScalingOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfNumber scale = (PdfNumber) operands.get(0);
processor.getGraphicsState().setHorizontalScaling(scale.floatValue());
}
}
/**
* A handler that implements operator (Tc). For more information see Table 51 ISO-32000-1
*/
private static class SetTextCharacterSpacingOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfNumber charSpace = (PdfNumber) operands.get(0);
processor.getGraphicsState().setCharSpacing(charSpace.floatValue());
}
}
/**
* A handler that implements operator (Tw). For more information see Table 51 ISO-32000-1
*/
private static class SetTextWordSpacingOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfNumber wordSpace = (PdfNumber) operands.get(0);
processor.getGraphicsState().setWordSpacing(wordSpace.floatValue());
}
}
/**
* A handler that implements operator (gs). For more information see Table 51 ISO-32000-1
*/
private static class ProcessGraphicsStateResourceOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfName dictionaryName = (PdfName) operands.get(0);
PdfDictionary extGState = processor.getResources().getResource(PdfName.ExtGState);
if (extGState == null)
throw new PdfException(
KernelExceptionMessageConstant.RESOURCES_DO_NOT_CONTAIN_EXTGSTATE_ENTRY_UNABLE_TO_PROCESS_THIS_OPERATOR
).setMessageParams(operator);
PdfDictionary gsDic = extGState.getAsDictionary(dictionaryName);
if (gsDic == null) {
gsDic = extGState.getAsStream(dictionaryName);
if (gsDic == null)
throw new PdfException(KernelExceptionMessageConstant.UNKNOWN_GRAPHICS_STATE_DICTIONARY)
.setMessageParams(dictionaryName);
}
PdfArray fontParameter = gsDic.getAsArray(PdfName.Font);
if (fontParameter != null) {
PdfFont font = processor.getFont(fontParameter.getAsDictionary(0));
float size = fontParameter.getAsNumber(1).floatValue();
processor.getGraphicsState().setFont(font);
processor.getGraphicsState().setFontSize(size);
}
PdfExtGState pdfExtGState = new PdfExtGState(gsDic.clone(Collections.singletonList(PdfName.Font)));
processor.getGraphicsState().updateFromExtGState(pdfExtGState);
}
}
/**
* A handler that implements operator (q). For more information see Table 51 ISO-32000-1
*/
private static class PushGraphicsStateOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
ParserGraphicsState gs = processor.gsStack.peek();
ParserGraphicsState copy = new ParserGraphicsState(gs);
processor.gsStack.push(copy);
}
}
/**
* A handler that implements operator (cm). For more information see Table 51 ISO-32000-1
*/
private static class ModifyCurrentTransformationMatrixOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float a = ((PdfNumber) operands.get(0)).floatValue();
float b = ((PdfNumber) operands.get(1)).floatValue();
float c = ((PdfNumber) operands.get(2)).floatValue();
float d = ((PdfNumber) operands.get(3)).floatValue();
float e = ((PdfNumber) operands.get(4)).floatValue();
float f = ((PdfNumber) operands.get(5)).floatValue();
Matrix matrix = new Matrix(a, b, c, d, e, f);
try {
processor.getGraphicsState().updateCtm(matrix);
} catch (PdfException exception) {
if (!(exception.getCause() instanceof NoninvertibleTransformException)) {
throw exception;
} else {
Logger logger = LoggerFactory.getLogger(PdfCanvasProcessor.class);
logger.error(MessageFormatUtil.format(IoLogMessageConstant.FAILED_TO_PROCESS_A_TRANSFORMATION_MATRIX));
}
}
}
}
/**
* Gets a color based on a list of operands and Color space.
*/
private static Color getColor(PdfColorSpace pdfColorSpace, List operands, PdfResources resources) {
PdfObject pdfObject;
if (pdfColorSpace.getPdfObject().isIndirectReference()) {
pdfObject = ((PdfIndirectReference) pdfColorSpace.getPdfObject()).getRefersTo();
} else {
pdfObject = pdfColorSpace.getPdfObject();
}
if (pdfObject.isName()) {
if (PdfName.DeviceGray.equals(pdfObject)) {
return new DeviceGray(getColorants(operands)[0]);
} else if (PdfName.Pattern.equals(pdfObject)) {
if (operands.get(0) instanceof PdfName) {
PdfPattern pattern = resources.getPattern((PdfName) operands.get(0));
if (pattern != null) {
return new PatternColor(pattern);
}
}
}
if (PdfName.DeviceRGB.equals(pdfObject)) {
float[] c = getColorants(operands);
return new DeviceRgb(c[0], c[1], c[2]);
} else if (PdfName.DeviceCMYK.equals(pdfObject)) {
float[] c = getColorants(operands);
return new DeviceCmyk(c[0], c[1], c[2], c[3]);
}
} else if (pdfObject.isArray()) {
PdfArray array = (PdfArray) pdfObject;
PdfName csType = array.getAsName(0);
if (PdfName.CalGray.equals(csType))
return new CalGray((PdfCieBasedCs.CalGray) pdfColorSpace, getColorants(operands)[0]);
else if (PdfName.CalRGB.equals(csType))
return new CalRgb((PdfCieBasedCs.CalRgb) pdfColorSpace, getColorants(operands));
else if (PdfName.Lab.equals(csType))
return new Lab((PdfCieBasedCs.Lab) pdfColorSpace, getColorants(operands));
else if (PdfName.ICCBased.equals(csType))
return new IccBased((PdfCieBasedCs.IccBased) pdfColorSpace, getColorants(operands));
else if (PdfName.Indexed.equals(csType))
return new Indexed(pdfColorSpace, (int) getColorants(operands)[0]);
else if (PdfName.Separation.equals(csType))
return new Separation((PdfSpecialCs.Separation) pdfColorSpace, getColorants(operands)[0]);
else if (PdfName.DeviceN.equals(csType))
return new DeviceN((PdfSpecialCs.DeviceN) pdfColorSpace, getColorants(operands));
else if (PdfName.Pattern.equals(csType)) {
List underlyingOperands = new ArrayList<>(operands);
PdfObject patternName = underlyingOperands.remove(operands.size() - 2);
PdfColorSpace underlyingCs = ((PdfSpecialCs.UncoloredTilingPattern) pdfColorSpace).getUnderlyingColorSpace();
if (patternName instanceof PdfName) {
PdfPattern pattern = resources.getPattern((PdfName) patternName);
if (pattern instanceof PdfPattern.Tiling && !((PdfPattern.Tiling) pattern).isColored()) {
return new PatternColor((PdfPattern.Tiling) pattern, underlyingCs, getColorants(underlyingOperands));
}
}
}
}
Logger logger = LoggerFactory.getLogger(PdfCanvasProcessor.class);
logger.warn(MessageFormatUtil.format(KernelLogMessageConstant.UNABLE_TO_PARSE_COLOR_WITHIN_COLORSPACE,
Arrays.toString((Object[])operands.toArray()), pdfColorSpace.getPdfObject()));
return null;
}
/**
* Gets a color based on a list of operands.
*/
private static Color getColor(int nOperands, List operands) {
float[] c = new float[nOperands];
for (int i = 0; i < nOperands; i++) {
c[i] = ((PdfNumber) operands.get(i)).floatValue();
}
switch (nOperands) {
case 1:
return new DeviceGray(c[0]);
case 3:
return new DeviceRgb(c[0], c[1], c[2]);
case 4:
return new DeviceCmyk(c[0], c[1], c[2], c[3]);
}
return null;
}
private static float[] getColorants(List operands) {
float[] c = new float[operands.size() - 1];
for (int i = 0; i < operands.size() - 1; i++) {
c[i] = ((PdfNumber) operands.get(i)).floatValue();
}
return c;
}
/**
* A handler that implements operator (Q). For more information see Table 51 ISO-32000-1
*/
protected static class PopGraphicsStateOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.gsStack.pop();
ParserGraphicsState gs = processor.getGraphicsState();
processor.eventOccurred(new ClippingPathInfo(gs, gs.getClippingPath(), gs.getCtm()), EventType.CLIP_PATH_CHANGED);
}
}
/**
* A handler that implements operator (g). For more information see Table 51 ISO-32000-1
*/
private static class SetGrayFillOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.getGraphicsState().setFillColor(getColor(1, operands));
}
}
/**
* A handler that implements operator (G). For more information see Table 51 ISO-32000-1
*/
private static class SetGrayStrokeOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.getGraphicsState().setStrokeColor(getColor(1, operands));
}
}
/**
* A handler that implements operator (rg). For more information see Table 51 ISO-32000-1
*/
private static class SetRGBFillOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.getGraphicsState().setFillColor(getColor(3, operands));
}
}
/**
* A handler that implements operator (RG). For more information see Table 51 ISO-32000-1
*/
private static class SetRGBStrokeOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.getGraphicsState().setStrokeColor(getColor(3, operands));
}
}
/**
* A handler that implements operator (k). For more information see Table 51 ISO-32000-1
*/
private static class SetCMYKFillOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.getGraphicsState().setFillColor(getColor(4, operands));
}
}
/**
* A handler that implements operator (K). For more information see Table 51 ISO-32000-1
*/
private static class SetCMYKStrokeOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.getGraphicsState().setStrokeColor(getColor(4, operands));
}
}
/**
* A handler that implements operator (CS). For more information see Table 51 ISO-32000-1
*/
private static class SetColorSpaceFillOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfColorSpace pdfColorSpace = determineColorSpace((PdfName) operands.get(0), processor);
processor.getGraphicsState().setFillColor(Color.makeColor(pdfColorSpace));
}
static PdfColorSpace determineColorSpace(PdfName colorSpace, PdfCanvasProcessor processor) {
PdfColorSpace pdfColorSpace;
if (PdfColorSpace.DIRECT_COLOR_SPACES.contains(colorSpace)) {
pdfColorSpace = PdfColorSpace.makeColorSpace(colorSpace);
} else {
PdfResources pdfResources = processor.getResources();
PdfDictionary resourceColorSpace = pdfResources.getPdfObject().getAsDictionary(PdfName.ColorSpace);
pdfColorSpace = PdfColorSpace.makeColorSpace(resourceColorSpace.get(colorSpace));
}
return pdfColorSpace;
}
}
/**
* A handler that implements operator (cs). For more information see Table 51 ISO-32000-1
*/
private static class SetColorSpaceStrokeOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfColorSpace pdfColorSpace = SetColorSpaceFillOperator.determineColorSpace((PdfName) operands.get(0), processor);
processor.getGraphicsState().setStrokeColor(Color.makeColor(pdfColorSpace));
}
}
/**
* A handler that implements operator (sc / scn). For more information see Table 51 ISO-32000-1
*/
private static class SetColorFillOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.getGraphicsState().setFillColor(getColor(processor.getGraphicsState().getFillColor().getColorSpace(), operands, processor.getResources()));
}
}
/**
* A handler that implements operator (SC / SCN). For more information see Table 51 ISO-32000-1
*/
private static class SetColorStrokeOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.getGraphicsState().setStrokeColor(getColor(processor.getGraphicsState().getStrokeColor().getColorSpace(), operands, processor.getResources()));
}
}
/**
* A handler that implements operator (BT). For more information see Table 51 ISO-32000-1
*/
private static class BeginTextOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.textMatrix = new Matrix();
processor.textLineMatrix = processor.textMatrix;
processor.beginText();
}
}
/**
* A handler that implements operator (ET). For more information see Table 51 ISO-32000-1
*/
private static class EndTextOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.textMatrix = null;
processor.textLineMatrix = null;
processor.endText();
}
}
/**
* A handler that implements operator (BMC). For more information see Table 51 ISO-32000-1
*/
private static class BeginMarkedContentOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor,
PdfLiteral operator, List operands) {
processor.beginMarkedContent((PdfName) operands.get(0), null);
}
}
/**
* A handler that implements operator (BDC). For more information see Table 51 ISO-32000-1
*/
private static class BeginMarkedContentDictionaryOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor,
PdfLiteral operator, List operands) {
PdfObject properties = operands.get(1);
processor.beginMarkedContent((PdfName) operands.get(0), getPropertiesDictionary(properties, processor.getResources()));
}
PdfDictionary getPropertiesDictionary(PdfObject operand1, PdfResources resources) {
if (operand1.isDictionary())
return (PdfDictionary) operand1;
PdfName dictionaryName = ((PdfName) operand1);
PdfDictionary properties = resources.getResource(PdfName.Properties);
if (null == properties) {
Logger logger = LoggerFactory.getLogger(PdfCanvasProcessor.class);
logger.warn(
MessageFormatUtil.format(IoLogMessageConstant.PDF_REFERS_TO_NOT_EXISTING_PROPERTY_DICTIONARY,
PdfName.Properties));
return null;
}
PdfDictionary propertiesDictionary = properties.getAsDictionary(dictionaryName);
if (null == propertiesDictionary) {
Logger logger = LoggerFactory.getLogger(PdfCanvasProcessor.class);
logger.warn(
MessageFormatUtil.format(IoLogMessageConstant.PDF_REFERS_TO_NOT_EXISTING_PROPERTY_DICTIONARY,
dictionaryName));
return null;
}
return properties.getAsDictionary(dictionaryName);
}
}
/**
* A handler that implements operator (EMC). For more information see Table 51 ISO-32000-1
*/
private static class EndMarkedContentOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor,
PdfLiteral operator, List operands) {
processor.endMarkedContent();
}
}
/**
* A handler that implements operator (Do). For more information see Table 51 ISO-32000-1
*/
private static class DoOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfName resourceName = (PdfName) operands.get(0);
processor.displayXObject(resourceName);
}
}
/**
* A handler that implements operator (EI). For more information see Table 51 ISO-32000-1
* BI and ID operators are parsed along with this operator.
* This not a usual operator, it will have a single operand, which will be a PdfStream object which
* encapsulates inline image dictionary and bytes
*/
private static class EndImageOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
PdfStream imageStream = (PdfStream) operands.get(0);
processor.displayImage(processor.markedContentStack, imageStream, null, true);
}
}
/**
* A handler that implements operator (w). For more information see Table 51 ISO-32000-1
*/
private static class SetLineWidthOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral oper, List operands) {
float lineWidth = ((PdfNumber) operands.get(0)).floatValue();
processor.getGraphicsState().setLineWidth(lineWidth);
}
}
/**
* A handler that implements operator (J). For more information see Table 51 ISO-32000-1
*/
private static class SetLineCapOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral oper, List operands) {
int lineCap = ((PdfNumber) operands.get(0)).intValue();
processor.getGraphicsState().setLineCapStyle(lineCap);
}
}
/**
* A handler that implements operator (j). For more information see Table 51 ISO-32000-1
*/
private static class SetLineJoinOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral oper, List operands) {
int lineJoin = ((PdfNumber) operands.get(0)).intValue();
processor.getGraphicsState().setLineJoinStyle(lineJoin);
}
}
/**
* A handler that implements operator (M). For more information see Table 51 ISO-32000-1
*/
private static class SetMiterLimitOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral oper, List operands) {
float miterLimit = ((PdfNumber) operands.get(0)).floatValue();
processor.getGraphicsState().setMiterLimit(miterLimit);
}
}
/**
* A handler that implements operator (d). For more information see Table 51 ISO-32000-1
*/
private static class SetLineDashPatternOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral oper, List operands) {
processor.getGraphicsState().setDashPattern(new PdfArray(Arrays.asList(operands.get(0), operands.get(1))));
}
}
/**
* An XObject subtype handler for FORM
*/
private static class FormXObjectDoHandler implements IXObjectDoHandler {
public void handleXObject(PdfCanvasProcessor processor, Stack canvasTagHierarchy, PdfStream xObjectStream, PdfName xObjectName) {
PdfDictionary resourcesDic = xObjectStream.getAsDictionary(PdfName.Resources);
PdfResources resources;
if (resourcesDic == null) {
resources = processor.getResources();
} else {
resources = new PdfResources(resourcesDic);
}
// we read the content bytes up here so if it fails we don't leave the graphics state stack corrupted
// this is probably not necessary (if we fail on this, probably the entire content stream processing
// operation should be rejected
byte[] contentBytes;
contentBytes = xObjectStream.getBytes();
final PdfArray matrix = xObjectStream.getAsArray(PdfName.Matrix);
new PushGraphicsStateOperator().invoke(processor, null, null);
if (matrix != null) {
float a = matrix.getAsNumber(0).floatValue();
float b = matrix.getAsNumber(1).floatValue();
float c = matrix.getAsNumber(2).floatValue();
float d = matrix.getAsNumber(3).floatValue();
float e = matrix.getAsNumber(4).floatValue();
float f = matrix.getAsNumber(5).floatValue();
Matrix formMatrix = new Matrix(a, b, c, d, e, f);
processor.getGraphicsState().updateCtm(formMatrix);
}
processor.processContent(contentBytes, resources);
new PopGraphicsStateOperator().invoke(processor, null, null);
}
}
/**
* An XObject subtype handler for IMAGE
*/
private static class ImageXObjectDoHandler implements IXObjectDoHandler {
public void handleXObject(PdfCanvasProcessor processor, Stack canvasTagHierarchy, PdfStream xObjectStream, PdfName resourceName) {
processor.displayImage(canvasTagHierarchy, xObjectStream, resourceName,false);
}
}
/**
* An XObject subtype handler that does nothing
*/
private static class IgnoreXObjectDoHandler implements IXObjectDoHandler {
public void handleXObject(PdfCanvasProcessor processor, Stack canvasTagHierarchy, PdfStream xObjectStream, PdfName xObjectName) {
// ignore XObject subtype
}
}
/**
* A handler that implements operator (m). For more information see Table 51 ISO-32000-1
*/
private static class MoveToOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float x = ((PdfNumber) operands.get(0)).floatValue();
float y = ((PdfNumber) operands.get(1)).floatValue();
processor.currentPath.moveTo(x, y);
}
}
/**
* A handler that implements operator (l). For more information see Table 51 ISO-32000-1
*/
private static class LineToOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float x = ((PdfNumber) operands.get(0)).floatValue();
float y = ((PdfNumber) operands.get(1)).floatValue();
processor.currentPath.lineTo(x, y);
}
}
/**
* A handler that implements operator (c). For more information see Table 51 ISO-32000-1
*/
private static class CurveOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float x1 = ((PdfNumber) operands.get(0)).floatValue();
float y1 = ((PdfNumber) operands.get(1)).floatValue();
float x2 = ((PdfNumber) operands.get(2)).floatValue();
float y2 = ((PdfNumber) operands.get(3)).floatValue();
float x3 = ((PdfNumber) operands.get(4)).floatValue();
float y3 = ((PdfNumber) operands.get(5)).floatValue();
processor.currentPath.curveTo(x1, y1, x2, y2, x3, y3);
}
}
/**
* A handler that implements operator (v). For more information see Table 51 ISO-32000-1
*/
private static class CurveFirstPointDuplicatedOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float x2 = ((PdfNumber) operands.get(0)).floatValue();
float y2 = ((PdfNumber) operands.get(1)).floatValue();
float x3 = ((PdfNumber) operands.get(2)).floatValue();
float y3 = ((PdfNumber) operands.get(3)).floatValue();
processor.currentPath.curveTo(x2, y2, x3, y3);
}
}
/**
* A handler that implements operator (y). For more information see Table 51 ISO-32000-1
*/
private static class CurveFourhPointDuplicatedOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float x1 = ((PdfNumber) operands.get(0)).floatValue();
float y1 = ((PdfNumber) operands.get(1)).floatValue();
float x3 = ((PdfNumber) operands.get(2)).floatValue();
float y3 = ((PdfNumber) operands.get(3)).floatValue();
processor.currentPath.curveFromTo(x1, y1, x3, y3);
}
}
/**
* A handler that implements operator (h). For more information see Table 51 ISO-32000-1
*/
private static class CloseSubpathOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.currentPath.closeSubpath();
}
}
/**
* A handler that implements operator (re). For more information see Table 51 ISO-32000-1
*/
private static class RectangleOperator implements IContentOperator {
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
float x = ((PdfNumber) operands.get(0)).floatValue();
float y = ((PdfNumber) operands.get(1)).floatValue();
float w = ((PdfNumber) operands.get(2)).floatValue();
float h = ((PdfNumber) operands.get(3)).floatValue();
processor.currentPath.rectangle(x, y, w, h);
}
}
/**
* A handler that implements operator (S, s, f, F, f*, B, B*, b, b*). For more information see Table 51 ISO-32000-1
*/
private static class PaintPathOperator implements IContentOperator {
private int operation;
private int rule;
private boolean close;
/**
* Constructs PainPath object.
*
* @param operation One of the possible combinations of {@link PathRenderInfo#STROKE}
* and {@link PathRenderInfo#FILL} values or
* {@link PathRenderInfo#NO_OP}
* @param rule Either {@link FillingRule#NONZERO_WINDING} or {@link FillingRule#EVEN_ODD}
* In case it isn't applicable pass any value.
* @param close Indicates whether the path should be closed or not.
*/
public PaintPathOperator(int operation, int rule, boolean close) {
this.operation = operation;
this.rule = rule;
this.close = close;
}
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
if (close) {
processor.currentPath.closeSubpath();
}
processor.paintPath(operation, rule);
}
}
/**
* A handler that implements operator (W, W*). For more information see Table 51 ISO-32000-1
*/
private static class ClipPathOperator implements IContentOperator {
private int rule;
public ClipPathOperator(int rule) {
this.rule = rule;
}
/**
* {@inheritDoc}
*/
public void invoke(PdfCanvasProcessor processor, PdfLiteral operator, List operands) {
processor.isClip = true;
processor.clippingRule = rule;
}
}
}
