iText 5 itextpdf.jar Source Code
itextpdf.jar is a component in iText 5 Java library to provide core functionalities.
iText Java library allows you to generate and manage PDF documents.
The Source Code files are provided at iText GitHub site.
You can compile it to generate your JAR file, using pom.xml as the build configuration file.
The source code of itextpdf-5.5.14.jar is provided below:
✍: FYIcenter.com
⏎ com/itextpdf/text/pdf/parser/PdfContentStreamProcessor.java
/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2020 iText Group NV
* Authors: Kevin Day, 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: sales@itextpdf.com
*/
package com.itextpdf.text.pdf.parser;
import java.io.IOException;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Stack;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.error_messages.MessageLocalization;
import com.itextpdf.text.io.RandomAccessSourceFactory;
import com.itextpdf.text.pdf.CMYKColor;
import com.itextpdf.text.pdf.CMapAwareDocumentFont;
import com.itextpdf.text.pdf.GrayColor;
import com.itextpdf.text.pdf.PRIndirectReference;
import com.itextpdf.text.pdf.PRTokeniser;
import com.itextpdf.text.pdf.PdfArray;
import com.itextpdf.text.pdf.PdfContentParser;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfIndirectReference;
import com.itextpdf.text.pdf.PdfLiteral;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfNumber;
import com.itextpdf.text.pdf.PdfObject;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStream;
import com.itextpdf.text.pdf.PdfString;
import com.itextpdf.text.pdf.RandomAccessFileOrArray;
/**
* Processor for a PDF content Stream.
* @since 2.1.4
*/
public class PdfContentStreamProcessor {
/**
* Default operator
* @since 5.0.1
*/
public static final String DEFAULTOPERATOR = "DefaultOperator";
/** A map with all supported operators (PDF syntax). */
final private Map<String, ContentOperator> operators;
/** Resources for the content stream. */
private ResourceDictionary resources;
/** Stack keeping track of the graphics state. */
private final Stack<GraphicsState> gsStack = new Stack<GraphicsState>();
/** Text matrix. */
private Matrix textMatrix;
/** Text line matrix. */
private Matrix textLineMatrix;
/** Listener that will be notified of render events */
final private RenderListener renderListener;
/** A map with all supported XObject handlers */
final private Map<PdfName, XObjectDoHandler> xobjectDoHandlers;
/**
* The font cache.
* @since 5.0.6
*/
/** */
final private Map<Integer,WeakReference<CMapAwareDocumentFont>> cachedFonts = new HashMap<Integer, WeakReference<CMapAwareDocumentFont>>();
/**
* A stack containing marked content info.
* @since 5.0.2
*/
private final Stack<MarkedContentInfo> markedContentStack = new Stack<MarkedContentInfo>();
/**
* Creates a new PDF Content Stream Processor that will send it's output to the
* designated render listener.
*
* @param renderListener the {@link RenderListener} that will receive rendering notifications
*/
public PdfContentStreamProcessor(RenderListener renderListener) {
this.renderListener = renderListener;
operators = new HashMap<String, ContentOperator>();
populateOperators();
xobjectDoHandlers = new HashMap<PdfName, XObjectDoHandler>();
populateXObjectDoHandlers();
reset();
}
private void populateXObjectDoHandlers(){
registerXObjectDoHandler(PdfName.DEFAULT, new IgnoreXObjectDoHandler());
registerXObjectDoHandler(PdfName.FORM, new FormXObjectDoHandler());
registerXObjectDoHandler(PdfName.IMAGE, new ImageXObjectDoHandler());
}
/**
* Registers a Do handler that will be called when Do for the provided XObject subtype is encountered during content processing.
* <br>
* 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
* @since 5.0.1
*/
public XObjectDoHandler registerXObjectDoHandler(PdfName xobjectSubType, XObjectDoHandler handler){
return xobjectDoHandlers.put(xobjectSubType, handler);
}
/**
* Gets the font pointed to by the indirect reference. The font may have been cached.
* @param ind the indirect reference ponting to the font
* @return the font
* @since 5.0.6
*/
private CMapAwareDocumentFont getFont(PRIndirectReference ind) {
Integer n = Integer.valueOf(ind.getNumber());
WeakReference<CMapAwareDocumentFont> fontRef = cachedFonts.get(n);
CMapAwareDocumentFont font = fontRef == null ? null : fontRef.get();
if (font == null) {
font = new CMapAwareDocumentFont(ind);
cachedFonts.put(n, new WeakReference<CMapAwareDocumentFont>(font));
}
return font;
}
private CMapAwareDocumentFont getFont(PdfDictionary fontResource) {
return new CMapAwareDocumentFont(fontResource);
}
/**
* Loads all the supported graphics and text state operators in a map.
*/
private void populateOperators(){
registerContentOperator(DEFAULTOPERATOR, new IgnoreOperatorContentOperator());
registerContentOperator("q", new PushGraphicsState());
registerContentOperator("Q", new PopGraphicsState());
registerContentOperator("g", new SetGrayFill());
registerContentOperator("G", new SetGrayStroke());
registerContentOperator("rg", new SetRGBFill());
registerContentOperator("RG", new SetRGBStroke());
registerContentOperator("k", new SetCMYKFill());
registerContentOperator("K", new SetCMYKStroke());
registerContentOperator("cs", new SetColorSpaceFill());
registerContentOperator("CS", new SetColorSpaceStroke());
registerContentOperator("sc", new SetColorFill());
registerContentOperator("SC", new SetColorStroke());
registerContentOperator("scn", new SetColorFill());
registerContentOperator("SCN", new SetColorStroke());
registerContentOperator("cm", new ModifyCurrentTransformationMatrix());
registerContentOperator("gs", new ProcessGraphicsStateResource());
SetTextCharacterSpacing tcOperator = new SetTextCharacterSpacing();
registerContentOperator("Tc", tcOperator);
SetTextWordSpacing twOperator = new SetTextWordSpacing();
registerContentOperator("Tw", twOperator);
registerContentOperator("Tz", new SetTextHorizontalScaling());
SetTextLeading tlOperator = new SetTextLeading();
registerContentOperator("TL", tlOperator);
registerContentOperator("Tf", new SetTextFont());
registerContentOperator("Tr", new SetTextRenderMode());
registerContentOperator("Ts", new SetTextRise());
registerContentOperator("BT", new BeginText());
registerContentOperator("ET", new EndText());
registerContentOperator("BMC", new BeginMarkedContent());
registerContentOperator("BDC", new BeginMarkedContentDictionary());
registerContentOperator("EMC", new EndMarkedContent());
TextMoveStartNextLine tdOperator = new TextMoveStartNextLine();
registerContentOperator("Td", tdOperator);
registerContentOperator("TD", new TextMoveStartNextLineWithLeading(tdOperator, tlOperator));
registerContentOperator("Tm", new TextSetTextMatrix());
TextMoveNextLine tstarOperator = new TextMoveNextLine(tdOperator);
registerContentOperator("T*", tstarOperator);
ShowText tjOperator = new ShowText();
registerContentOperator("Tj", tjOperator);
MoveNextLineAndShowText tickOperator = new MoveNextLineAndShowText(tstarOperator, tjOperator);
registerContentOperator("'", tickOperator);
registerContentOperator("\"", new MoveNextLineAndShowTextWithSpacing(twOperator, tcOperator, tickOperator));
registerContentOperator("TJ", new ShowTextArray());
registerContentOperator("Do", new Do());
registerContentOperator("w", new SetLineWidth());
registerContentOperator("J", new SetLineCap());
registerContentOperator("j", new SetLineJoin());
registerContentOperator("M", new SetMiterLimit());
registerContentOperator("d", new SetLineDashPattern());
// Path construction and painting operators
if (renderListener instanceof ExtRenderListener) {
int fillStroke = PathPaintingRenderInfo.FILL | PathPaintingRenderInfo.STROKE;
registerContentOperator("m", new MoveTo());
registerContentOperator("l", new LineTo());
registerContentOperator("c", new Curve());
registerContentOperator("v", new CurveFirstPointDuplicated());
registerContentOperator("y", new CurveFourhPointDuplicated());
registerContentOperator("h", new CloseSubpath());
registerContentOperator("re", new Rectangle());
registerContentOperator("S", new PaintPath(PathPaintingRenderInfo.STROKE, -1, false));
registerContentOperator("s", new PaintPath(PathPaintingRenderInfo.STROKE, -1, true));
registerContentOperator("f", new PaintPath(PathPaintingRenderInfo.FILL, PathPaintingRenderInfo.NONZERO_WINDING_RULE, false));
registerContentOperator("F", new PaintPath(PathPaintingRenderInfo.FILL, PathPaintingRenderInfo.NONZERO_WINDING_RULE, false));
registerContentOperator("f*", new PaintPath(PathPaintingRenderInfo.FILL, PathPaintingRenderInfo.EVEN_ODD_RULE, false));
registerContentOperator("B", new PaintPath(fillStroke, PathPaintingRenderInfo.NONZERO_WINDING_RULE, false));
registerContentOperator("B*", new PaintPath(fillStroke, PathPaintingRenderInfo.EVEN_ODD_RULE, false));
registerContentOperator("b", new PaintPath(fillStroke, PathPaintingRenderInfo.NONZERO_WINDING_RULE, true));
registerContentOperator("b*", new PaintPath(fillStroke, PathPaintingRenderInfo.EVEN_ODD_RULE, true));
registerContentOperator("n", new PaintPath(PathPaintingRenderInfo.NO_OP, -1, false));
registerContentOperator("W", new ClipPath(PathPaintingRenderInfo.NONZERO_WINDING_RULE));
registerContentOperator("W*", new ClipPath(PathPaintingRenderInfo.EVEN_ODD_RULE));
}
}
/**
* Registers a content operator that will be called when the specified operator string is encountered during content processing.
* <br>
* 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 DEFAULTOPERATOR 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
* @since 2.1.7
*/
public ContentOperator registerContentOperator(String operatorString, ContentOperator operator){
return operators.put(operatorString, operator);
}
/**
* @return {@link java.util.Collection} containing all the registered operators strings
* @since 5.5.6
*/
public Collection<String> getRegisteredOperatorStrings() {
return new ArrayList<String>(operators.keySet());
}
/**
* Resets the graphics state stack, matrices and resources.
*/
public void reset(){
gsStack.removeAllElements();
gsStack.add(new GraphicsState());
textMatrix = null;
textLineMatrix = null;
resources = new ResourceDictionary();
}
/**
* Returns the current graphics state.
* @return the graphics state
*/
public GraphicsState gs(){
return gsStack.peek();
}
/**
* Invokes an operator.
* @param operator the PDF Syntax of the operator
* @param operands a list with operands
*/
private void invokeOperator(PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception{
ContentOperator op = operators.get(operator.toString());
if (op == null)
op = operators.get(DEFAULTOPERATOR);
op.invoke(this, operator, operands);
}
/**
* Add to the marked content stack
* @param tag the tag of the marked content
* @param dict the PdfDictionary associated with the marked content
* @since 5.0.2
*/
private void beginMarkedContent(PdfName tag, PdfDictionary dict) {
markedContentStack.push(new MarkedContentInfo(tag, dict));
}
/**
* Remove the latest marked content from the stack. Keeps track of the BMC, BDC and EMC operators.
* @since 5.0.2
*/
private void endMarkedContent() {
markedContentStack.pop();
}
/**
* Used to trigger beginTextBlock on the renderListener
*/
private void beginText(){
renderListener.beginTextBlock();
}
/**
* Used to trigger endTextBlock on the renderListener
*/
private void endText(){
renderListener.endTextBlock();
}
/**
* Displays text.
* @param string the text to display
*/
private void displayPdfString(PdfString string){
TextRenderInfo renderInfo = new TextRenderInfo(string, gs(), textMatrix, markedContentStack);
renderListener.renderText(renderInfo);
textMatrix = new Matrix(renderInfo.getUnscaledWidth(), 0).multiply(textMatrix);
}
/**
* Displays an XObject using the registered handler for this XObject's subtype
* @param xobjectName the name of the XObject to retrieve from the resource dictionary
*/
private void displayXObject(PdfName xobjectName) throws IOException {
PdfDictionary xobjects = resources.getAsDict(PdfName.XOBJECT);
PdfObject xobject = PdfReader.getPdfObjectRelease(xobjects.get(xobjectName));
PdfStream xobjectStream = (PdfStream)xobject;
PdfName subType = xobjectStream.getAsName(PdfName.SUBTYPE);
if (xobject.isStream()){
XObjectDoHandler handler = xobjectDoHandlers.get(subType);
if (handler == null)
handler = xobjectDoHandlers.get(PdfName.DEFAULT);
handler.handleXObject(this, xobjectStream, xobjects.getAsIndirectObject(xobjectName),markedContentStack);
} else {
throw new IllegalStateException(MessageLocalization.getComposedMessage("XObject.1.is.not.a.stream", xobjectName));
}
}
/**
* Displays the current path.
*
* @param operation One of the possible combinations of {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#STROKE}
* and {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#FILL} values or
* {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#NO_OP}
* @param rule Either {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#NONZERO_WINDING_RULE} or
* {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#EVEN_ODD_RULE}
* In case it isn't applicable pass any <CODE>byte</CODE> value.
* @param close Indicates whether the path should be closed or not.
* @since 5.5.6
*/
private void paintPath(int operation, int rule, boolean close) {
if (close) {
modifyPath(PathConstructionRenderInfo.CLOSE, null);
}
PathPaintingRenderInfo renderInfo = new PathPaintingRenderInfo(operation, rule, gs());
((ExtRenderListener) renderListener).renderPath(renderInfo);
}
/**
* Modifies the current path.
*
* @param operation Indicates which path-construction operation should be performed.
* @param segmentData Contains x, y components of points of a new segment being added to the current path.
* E.g. x1 y1 x2 y2 x3 y3 etc. It's ignored for "close subpath" operarion (h).
*/
private void modifyPath(int operation, List<Float> segmentData) {
PathConstructionRenderInfo renderInfo = new PathConstructionRenderInfo(operation, segmentData, gs().getCtm());
((ExtRenderListener) renderListener).modifyPath(renderInfo);
}
private void clipPath(int rule) {
((ExtRenderListener) renderListener).clipPath(rule);
}
/**
* 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 * gs().fontSize * gs().horizontalScaling;
textMatrix = new Matrix(adjustBy, 0).multiply(textMatrix);
}
/**
* Processes PDF syntax.
* <b>Note:</b> If you re-use a given {@link PdfContentStreamProcessor}, you must call {@link PdfContentStreamProcessor#reset()}
* @param contentBytes the bytes of a content stream
* @param resources the resources that come with the content stream
*/
public void processContent(byte[] contentBytes, PdfDictionary resources){
this.resources.push(resources);
try {
PRTokeniser tokeniser = new PRTokeniser(new RandomAccessFileOrArray(new RandomAccessSourceFactory().createSource(contentBytes)));
PdfContentParser ps = new PdfContentParser(tokeniser);
ArrayList<PdfObject> operands = new ArrayList<PdfObject>();
while (ps.parse(operands).size() > 0){
PdfLiteral operator = (PdfLiteral)operands.get(operands.size()-1);
if ("BI".equals(operator.toString())){
// we don't call invokeOperator for embedded images - this is one area of the PDF spec that is particularly nasty and inconsistent
PdfDictionary colorSpaceDic = resources != null ? resources.getAsDict(PdfName.COLORSPACE) : null;
handleInlineImage(InlineImageUtils.parseInlineImage(ps, colorSpaceDic), colorSpaceDic);
} else {
invokeOperator(operator, operands);
}
}
}
catch (Exception e) {
throw new ExceptionConverter(e);
}
this.resources.pop();
}
/**
* Callback when an inline image is found. This requires special handling because inline images don't follow the standard operator syntax
* @param info the inline image
* @param colorSpaceDic the color space for the inline immage
*/
protected void handleInlineImage(InlineImageInfo info, PdfDictionary colorSpaceDic){
ImageRenderInfo renderInfo = ImageRenderInfo.createForEmbeddedImage(gs(), info, colorSpaceDic,markedContentStack);
renderListener.renderImage(renderInfo);
}
/**
* Accessor method for the RenderListener object maintained in this class.
* Necessary for implementing custom ContentOperator implementations.
* @return the renderListener
*/
public RenderListener getRenderListener() {
return renderListener;
}
/**
* A resource dictionary that allows stack-like behavior to support resource dictionary inheritance
*/
private static class ResourceDictionary extends PdfDictionary{
private final List<PdfDictionary> resourcesStack = new ArrayList<PdfDictionary>();
public ResourceDictionary() {
}
public void push(PdfDictionary resources){
resourcesStack.add(resources);
}
public void pop(){
resourcesStack.remove(resourcesStack.size()-1);
}
@Override
public PdfObject getDirectObject(PdfName key) {
for (int i = resourcesStack.size() - 1; i >= 0; i--){
PdfDictionary subResource = resourcesStack.get(i);
if (subResource != null){
PdfObject obj = subResource.getDirectObject(key);
if (obj != null) return obj;
}
}
return super.getDirectObject(key); // shouldn't be necessary, but just in case we've done something crazy
}
}
/**
* A content operator implementation (unregistered).
*/
private static class IgnoreOperatorContentOperator implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands){
// ignore the operator
}
}
/**
* A content operator implementation (TJ).
*/
private static class ShowTextArray implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfArray array = (PdfArray)operands.get(0);
float tj = 0;
for (Iterator<PdfObject> i = array.listIterator(); i.hasNext(); ) {
PdfObject entryObj = i.next();
if (entryObj instanceof PdfString){
processor.displayPdfString((PdfString)entryObj);
tj = 0;
} else {
tj = ((PdfNumber)entryObj).floatValue();
processor.applyTextAdjust(tj);
}
}
}
}
/**
* A content operator implementation (").
*/
private static class MoveNextLineAndShowTextWithSpacing implements ContentOperator{
private final SetTextWordSpacing setTextWordSpacing;
private final SetTextCharacterSpacing setTextCharacterSpacing;
private final MoveNextLineAndShowText moveNextLineAndShowText;
public MoveNextLineAndShowTextWithSpacing(SetTextWordSpacing setTextWordSpacing, SetTextCharacterSpacing setTextCharacterSpacing, MoveNextLineAndShowText moveNextLineAndShowText) {
this.setTextWordSpacing = setTextWordSpacing;
this.setTextCharacterSpacing = setTextCharacterSpacing;
this.moveNextLineAndShowText = moveNextLineAndShowText;
}
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfNumber aw = (PdfNumber)operands.get(0);
PdfNumber ac = (PdfNumber)operands.get(1);
PdfString string = (PdfString)operands.get(2);
ArrayList<PdfObject> twOperands = new ArrayList<PdfObject>(1);
twOperands.add(0, aw);
setTextWordSpacing.invoke(processor, null, twOperands);
ArrayList<PdfObject> tcOperands = new ArrayList<PdfObject>(1);
tcOperands.add(0, ac);
setTextCharacterSpacing.invoke(processor, null, tcOperands);
ArrayList<PdfObject> tickOperands = new ArrayList<PdfObject>(1);
tickOperands.add(0, string);
moveNextLineAndShowText.invoke(processor, null, tickOperands);
}
}
/**
* A content operator implementation (').
*/
private static class MoveNextLineAndShowText implements ContentOperator{
private final TextMoveNextLine textMoveNextLine;
private final ShowText showText;
public MoveNextLineAndShowText(TextMoveNextLine textMoveNextLine, ShowText showText) {
this.textMoveNextLine = textMoveNextLine;
this.showText = showText;
}
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
textMoveNextLine.invoke(processor, null, new ArrayList<PdfObject>(0));
showText.invoke(processor, null, operands);
}
}
/**
* A content operator implementation (Tj).
*/
private static class ShowText implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfString string = (PdfString)operands.get(0);
processor.displayPdfString(string);
}
}
/**
* A content operator implementation (T*).
*/
private static class TextMoveNextLine implements ContentOperator{
private final TextMoveStartNextLine moveStartNextLine;
public TextMoveNextLine(TextMoveStartNextLine moveStartNextLine){
this.moveStartNextLine = moveStartNextLine;
}
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
ArrayList<PdfObject> tdoperands = new ArrayList<PdfObject>(2);
tdoperands.add(0, new PdfNumber(0));
tdoperands.add(1, new PdfNumber(-processor.gs().leading));
moveStartNextLine.invoke(processor, null, tdoperands);
}
}
/**
* A content operator implementation (Tm).
*/
private static class TextSetTextMatrix implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> 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 content operator implementation (TD).
*/
private static class TextMoveStartNextLineWithLeading implements ContentOperator{
private final TextMoveStartNextLine moveStartNextLine;
private final SetTextLeading setTextLeading;
public TextMoveStartNextLineWithLeading(TextMoveStartNextLine moveStartNextLine, SetTextLeading setTextLeading){
this.moveStartNextLine = moveStartNextLine;
this.setTextLeading = setTextLeading;
}
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
float ty = ((PdfNumber)operands.get(1)).floatValue();
ArrayList<PdfObject> tlOperands = new ArrayList<PdfObject>(1);
tlOperands.add(0, new PdfNumber(-ty));
setTextLeading.invoke(processor, null, tlOperands);
moveStartNextLine.invoke(processor, null, operands);
}
}
/**
* A content operator implementation (Td).
*/
private static class TextMoveStartNextLine implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> 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 content operator implementation (Tf).
*/
private static class SetTextFont implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfName fontResourceName = (PdfName)operands.get(0);
float size = ((PdfNumber)operands.get(1)).floatValue();
PdfDictionary fontsDictionary = processor.resources.getAsDict(PdfName.FONT);
CMapAwareDocumentFont font;
PdfObject fontObject = fontsDictionary.get(fontResourceName);
if (fontObject instanceof PdfDictionary)
font = processor.getFont((PdfDictionary)fontObject);
else
font = processor.getFont((PRIndirectReference)fontObject);
processor.gs().font = font;
processor.gs().fontSize = size;
}
}
/**
* A content operator implementation (Tr).
*/
private static class SetTextRenderMode implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfNumber render = (PdfNumber)operands.get(0);
processor.gs().renderMode = render.intValue();
}
}
/**
* A content operator implementation (Ts).
*/
private static class SetTextRise implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfNumber rise = (PdfNumber)operands.get(0);
processor.gs().rise = rise.floatValue();
}
}
/**
* A content operator implementation (TL).
*/
private static class SetTextLeading implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfNumber leading = (PdfNumber)operands.get(0);
processor.gs().leading = leading.floatValue();
}
}
/**
* A content operator implementation (Tz).
*/
private static class SetTextHorizontalScaling implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfNumber scale = (PdfNumber)operands.get(0);
processor.gs().horizontalScaling = scale.floatValue()/100f;
}
}
/**
* A content operator implementation (Tc).
*/
private static class SetTextCharacterSpacing implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfNumber charSpace = (PdfNumber)operands.get(0);
processor.gs().characterSpacing = charSpace.floatValue();
}
}
/**
* A content operator implementation (Tw).
*/
private static class SetTextWordSpacing implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfNumber wordSpace = (PdfNumber)operands.get(0);
processor.gs().wordSpacing = wordSpace.floatValue();
}
}
/**
* A content operator implementation (gs).
*/
private static class ProcessGraphicsStateResource implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
PdfName dictionaryName = (PdfName)operands.get(0);
PdfDictionary extGState = processor.resources.getAsDict(PdfName.EXTGSTATE);
if (extGState == null)
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("resources.do.not.contain.extgstate.entry.unable.to.process.operator.1", operator));
PdfDictionary gsDic = extGState.getAsDict(dictionaryName);
if (gsDic == null)
throw new IllegalArgumentException(MessageLocalization.getComposedMessage("1.is.an.unknown.graphics.state.dictionary", dictionaryName));
// at this point, all we care about is the FONT entry in the GS dictionary
PdfArray fontParameter = gsDic.getAsArray(PdfName.FONT);
if (fontParameter != null){
CMapAwareDocumentFont font = processor.getFont((PRIndirectReference)fontParameter.getPdfObject(0));
float size = fontParameter.getAsNumber(1).floatValue();
processor.gs().font = font;
processor.gs().fontSize = size;
}
}
}
/**
* A content operator implementation (q).
*/
private static class PushGraphicsState implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
GraphicsState gs = processor.gsStack.peek();
GraphicsState copy = new GraphicsState(gs);
processor.gsStack.push(copy);
}
}
/**
* A content operator implementation (cm).
*/
private static class ModifyCurrentTransformationMatrix implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> 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);
GraphicsState gs = processor.gsStack.peek();
gs.ctm = matrix.multiply(gs.ctm);
}
}
/**
* Gets a color based on a list of operands.
*/
private static BaseColor getColor(PdfName colorSpace, List<PdfObject> operands) {
if (PdfName.DEVICEGRAY.equals(colorSpace)) {
return getColor(1, operands);
}
if (PdfName.DEVICERGB.equals(colorSpace)) {
return getColor(3, operands);
}
if (PdfName.DEVICECMYK.equals(colorSpace)) {
return getColor(4, operands);
}
return null;
}
/**
* Gets a color based on a list of operands.
*/
private static BaseColor getColor(int nOperands, List<PdfObject> operands) {
float[] c = new float[nOperands];
for (int i = 0; i < nOperands; i++) {
c[i] = ((PdfNumber)operands.get(i)).floatValue();
// fallbacks for illegal values: handled as Acrobat and Foxit do
if (c[i] > 1f) {
c[i] = 1f;
}
else if (c[i] < 0f) {
c[i] = 0f;
}
}
switch (nOperands) {
case 1:
return new GrayColor(c[0]);
case 3:
return new BaseColor(c[0], c[1], c[2]);
case 4:
return new CMYKColor(c[0], c[1], c[2], c[3]);
}
return null;
}
/**
* A content operator implementation (g).
*/
private static class SetGrayFill implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().fillColor = getColor(1, operands);
}
}
/**
* A content operator implementation (G).
*/
private static class SetGrayStroke implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().strokeColor = getColor(1, operands);
}
}
/**
* A content operator implementation (rg).
*/
private static class SetRGBFill implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().fillColor = getColor(3, operands);
}
}
/**
* A content operator implementation (RG).
*/
private static class SetRGBStroke implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().strokeColor = getColor(3, operands);
}
}
/**
* A content operator implementation (rg).
*/
private static class SetCMYKFill implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().fillColor = getColor(4, operands);
}
}
/**
* A content operator implementation (RG).
*/
private static class SetCMYKStroke implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().strokeColor = getColor(4, operands);
}
}
/**
* A content operator implementation (cs).
*/
private static class SetColorSpaceFill implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().colorSpaceFill = (PdfName)operands.get(0);
}
}
/**
* A content operator implementation (CS).
*/
private static class SetColorSpaceStroke implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().colorSpaceStroke = (PdfName)operands.get(0);
}
}
/**
* A content operator implementation (sc / scn).
*/
private static class SetColorFill implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().fillColor = getColor(processor.gs().colorSpaceFill, operands);
}
}
/**
* A content operator implementation (SC / SCN).
*/
private static class SetColorStroke implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gs().strokeColor = getColor(processor.gs().colorSpaceStroke, operands);
}
}
/**
* A content operator implementation (Q).
*/
private static class PopGraphicsState implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.gsStack.pop();
}
}
/**
* A content operator implementation (BT).
*/
private static class BeginText implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.textMatrix = new Matrix();
processor.textLineMatrix = processor.textMatrix;
processor.beginText();
}
}
/**
* A content operator implementation (ET).
*/
private static class EndText implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) {
processor.textMatrix = null;
processor.textLineMatrix = null;
processor.endText();
}
}
/**
* A content operator implementation (BMC).
* @since 5.0.2
*/
private static class BeginMarkedContent implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor,
PdfLiteral operator, ArrayList<PdfObject> operands)
throws Exception {
processor.beginMarkedContent((PdfName)operands.get(0), new PdfDictionary());
}
}
/**
* A content operator implementation (BDC).
* @since 5.0.2
*/
private static class BeginMarkedContentDictionary implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor,
PdfLiteral operator, ArrayList<PdfObject> operands)
throws Exception {
PdfObject properties = operands.get(1);
processor.beginMarkedContent((PdfName)operands.get(0), getPropertiesDictionary(properties, processor.resources));
}
private PdfDictionary getPropertiesDictionary(PdfObject operand1, ResourceDictionary resources){
if (operand1.isDictionary())
return (PdfDictionary)operand1;
PdfName dictionaryName = ((PdfName)operand1);
return resources.getAsDict(dictionaryName);
}
}
/**
* A content operator implementation (EMC).
* @since 5.0.2
*/
private static class EndMarkedContent implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor,
PdfLiteral operator, ArrayList<PdfObject> operands)
throws Exception {
processor.endMarkedContent();
}
}
/**
* A content operator implementation (Do).
*/
private static class Do implements ContentOperator{
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws IOException {
PdfName xobjectName = (PdfName)operands.get(0);
processor.displayXObject(xobjectName);
}
}
/**
* A content operator implementation (w).
*/
private static class SetLineWidth implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral oper, ArrayList<PdfObject> operands) {
float lineWidth = ((PdfNumber) operands.get(0)).floatValue();
processor.gs().setLineWidth(lineWidth);
}
}
/**
* A content operator implementation (J).
*/
private static class SetLineCap implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral oper, ArrayList<PdfObject> operands) {
int lineCap = ((PdfNumber) operands.get(0)).intValue();
processor.gs().setLineCapStyle(lineCap);
}
}
/**
* A content operator implementation (j).
*/
private static class SetLineJoin implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral oper, ArrayList<PdfObject> operands) {
int lineJoin = ((PdfNumber) operands.get(0)).intValue();
processor.gs().setLineJoinStyle(lineJoin);
}
}
/**
* A content operator implementation (M).
*/
private static class SetMiterLimit implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral oper, ArrayList<PdfObject> operands) {
float miterLimit = ((PdfNumber) operands.get(0)).floatValue();
processor.gs().setMiterLimit(miterLimit);
}
}
/**
* A content operator implementation (d).
*/
private static class SetLineDashPattern implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral oper, ArrayList<PdfObject> operands) {
LineDashPattern pattern = new LineDashPattern(((PdfArray) operands.get(0)),
((PdfNumber) operands.get(1)).floatValue());
processor.gs().setLineDashPattern(pattern);
}
}
/**
* A content operator implementation (m).
*
* @since 5.5.6
*/
private static class MoveTo implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
float x = ((PdfNumber) operands.get(0)).floatValue();
float y = ((PdfNumber) operands.get(1)).floatValue();
processor.modifyPath(PathConstructionRenderInfo.MOVETO, Arrays.asList(x, y));
}
}
/**
* A content operator implementation (l).
*
* @since 5.5.6
*/
private static class LineTo implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
float x = ((PdfNumber) operands.get(0)).floatValue();
float y = ((PdfNumber) operands.get(1)).floatValue();
processor.modifyPath(PathConstructionRenderInfo.LINETO, Arrays.asList(x, y));
}
}
/**
* A content operator implementation (c).
*
* @since 5.5.6
*/
private static class Curve implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
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.modifyPath(PathConstructionRenderInfo.CURVE_123, Arrays.asList(x1, y1, x2, y2, x3, y3));
}
}
/**
* A content operator implementation (v).
*
* @since 5.5.6
*/
private static class CurveFirstPointDuplicated implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
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.modifyPath(PathConstructionRenderInfo.CURVE_23, Arrays.asList(x2, y2, x3, y3));
}
}
/**
* A content operator implementation (y).
*
* @since 5.5.6
*/
private static class CurveFourhPointDuplicated implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
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.modifyPath(PathConstructionRenderInfo.CURVE_13, Arrays.asList(x1, y1, x3, y3));
}
}
/**
* A content operator implementation (h).
*
* @since 5.5.6
*/
private static class CloseSubpath implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
processor.modifyPath(PathConstructionRenderInfo.CLOSE, null);
}
}
/**
* A content operator implementation (re).
*
* @since 5.5.6
*/
private static class Rectangle implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
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.modifyPath(PathConstructionRenderInfo.RECT, Arrays.asList(x, y, w, h));
}
}
/**
* A content operator implementation (S, s, f, F, f*, B, B*, b, b*).
*
* @since 5.5.6
*/
private static class PaintPath implements ContentOperator {
private int operation;
private int rule;
private boolean close;
/**
* Constructs PainPath object.
*
* @param operation One of the possible combinations of {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#STROKE}
* and {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#FILL} values or
* {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#NO_OP}
* @param rule Either {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#NONZERO_WINDING_RULE} or
* {@link com.itextpdf.text.pdf.parser.PathPaintingRenderInfo#EVEN_ODD_RULE}
* In case it isn't applicable pass any value.
* @param close Indicates whether the path should be closed or not.
*/
public PaintPath(int operation, int rule, boolean close) {
this.operation = operation;
this.rule = rule;
this.close = close;
}
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
processor.paintPath(operation, rule, close);
// TODO: add logic for clipping path (before add it to the graphics state)
}
}
/**
* A content operator implementation (W, W*)
*
* @since 5.5.6
*/
private static class ClipPath implements ContentOperator {
private int rule;
public ClipPath(int rule) {
this.rule = rule;
}
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
processor.clipPath(rule);
}
}
/**
* A content operator implementation (n).
*
* @since 5.5.6
*/
private static class EndPath implements ContentOperator {
public void invoke(PdfContentStreamProcessor processor, PdfLiteral operator, ArrayList<PdfObject> operands) throws Exception {
processor.paintPath(PathPaintingRenderInfo.NO_OP, -1, false);
}
}
/**
* An XObject subtype handler for FORM
*/
private static class FormXObjectDoHandler implements XObjectDoHandler{
public void handleXObject(PdfContentStreamProcessor processor, PdfStream stream, PdfIndirectReference ref) {
handleXObject(processor,stream,ref,null);
}
public void handleXObject(PdfContentStreamProcessor processor, PdfStream stream, PdfIndirectReference ref, Stack<MarkedContentInfo> markedContentStack) {
final PdfDictionary resources = stream.getAsDict(PdfName.RESOURCES);
// 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;
try {
contentBytes = ContentByteUtils.getContentBytesFromContentObject(stream);
} catch (IOException e1) {
throw new ExceptionConverter(e1);
}
final PdfArray matrix = stream.getAsArray(PdfName.MATRIX);
new PushGraphicsState().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.gs().ctm = formMatrix.multiply(processor.gs().ctm);
}
processor.processContent(contentBytes, resources);
new PopGraphicsState().invoke(processor, null, null);
}
}
/**
* An XObject subtype handler for IMAGE
*/
private static class ImageXObjectDoHandler implements XObjectDoHandler{
public void handleXObject(PdfContentStreamProcessor processor, PdfStream xobjectStream, PdfIndirectReference ref) {
PdfDictionary colorSpaceDic = processor.resources.getAsDict(PdfName.COLORSPACE);
ImageRenderInfo renderInfo = ImageRenderInfo.createForXObject(processor.gs(), ref, colorSpaceDic,null);
processor.renderListener.renderImage(renderInfo);
}
public void handleXObject(PdfContentStreamProcessor processor, PdfStream xobjectStream, PdfIndirectReference ref, Stack<MarkedContentInfo> markedContentStack) {
PdfDictionary colorSpaceDic = processor.resources.getAsDict(PdfName.COLORSPACE);
ImageRenderInfo renderInfo = ImageRenderInfo.createForXObject(processor.gs(), ref, colorSpaceDic,markedContentStack);
processor.renderListener.renderImage(renderInfo);
}
}
/**
* An XObject subtype handler that does nothing
*/
private static class IgnoreXObjectDoHandler implements XObjectDoHandler{
public void handleXObject(PdfContentStreamProcessor processor, PdfStream xobjectStream, PdfIndirectReference ref) {
// ignore XObject subtype
}
public void handleXObject(PdfContentStreamProcessor processor, PdfStream xobjectStream, PdfIndirectReference ref, Stack<MarkedContentInfo> markedContentStack) {
// ignore XObject subtype
}
}
}
⏎ com/itextpdf/text/pdf/parser/PdfContentStreamProcessor.java
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