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Flying Saucer is a CSS 2.1 renderer written in Java. This artifact supports PDF output with iText 5.x.
/*
* {{{ header & license
* Copyright (c) 2006 Wisconsin Court System
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* }}}
*/
package org.xhtmlrenderer.pdf;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.CMYKColor;
import com.itextpdf.text.pdf.PdfAction;
import com.itextpdf.text.pdf.PdfAnnotation;
import com.itextpdf.text.pdf.PdfBorderArray;
import com.itextpdf.text.pdf.PdfBorderDictionary;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfDestination;
import com.itextpdf.text.pdf.PdfImportedPage;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfNumber;
import com.itextpdf.text.pdf.PdfOutline;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfTextArray;
import com.itextpdf.text.pdf.PdfWriter;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xhtmlrenderer.css.constants.IdentValue;
import org.xhtmlrenderer.css.parser.FSCMYKColor;
import org.xhtmlrenderer.css.parser.FSColor;
import org.xhtmlrenderer.css.parser.FSRGBColor;
import org.xhtmlrenderer.css.style.CalculatedStyle;
import org.xhtmlrenderer.css.style.CssContext;
import org.xhtmlrenderer.css.value.FontSpecification;
import org.xhtmlrenderer.extend.FSImage;
import org.xhtmlrenderer.extend.NamespaceHandler;
import org.xhtmlrenderer.extend.OutputDevice;
import org.xhtmlrenderer.layout.SharedContext;
import org.xhtmlrenderer.pdf.ITextFontResolver.FontDescription;
import org.xhtmlrenderer.render.AbstractOutputDevice;
import org.xhtmlrenderer.render.BlockBox;
import org.xhtmlrenderer.render.Box;
import org.xhtmlrenderer.render.FSFont;
import org.xhtmlrenderer.render.InlineLayoutBox;
import org.xhtmlrenderer.render.InlineText;
import org.xhtmlrenderer.render.JustificationInfo;
import org.xhtmlrenderer.render.PageBox;
import org.xhtmlrenderer.render.RenderingContext;
import org.xhtmlrenderer.util.Configuration;
import org.xhtmlrenderer.util.XRLog;
import org.xhtmlrenderer.util.XRRuntimeException;
import java.awt.*;
import java.awt.RenderingHints.Key;
import java.awt.geom.AffineTransform;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.NoninvertibleTransformException;
import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.logging.Level;
import java.util.regex.Pattern;
import static java.util.Collections.emptyList;
import static java.util.Comparator.comparingInt;
/**
* This class is largely based on `com.itextpdf.text.pdf.PdfGraphics2D`.
* See http://sourceforge.net/
* projects/itext/ for license information.
*/
public class ITextOutputDevice extends AbstractOutputDevice implements OutputDevice {
private static final int FILL = 1;
private static final int STROKE = 2;
private static final int CLIP = 3;
private static final AffineTransform IDENTITY = new AffineTransform();
private static final BasicStroke STROKE_ONE = new BasicStroke(1);
private static final boolean ROUND_RECT_DIMENSIONS_DOWN = Configuration.isTrue("xr.pdf.round.rect.dimensions.down", false);
private PdfContentByte _currentPage;
private float _pageHeight;
private ITextFSFont _font;
private AffineTransform _transform = new AffineTransform();
private BaseColor _color = BaseColor.BLACK;
private BaseColor _fillColor;
private BaseColor _strokeColor;
private Stroke _stroke;
private Stroke _originalStroke;
private Stroke _oldStroke;
private Area _clip;
private SharedContext _sharedContext;
private final float _dotsPerPoint;
private PdfWriter _writer;
private final Map _readerCache = new HashMap<>();
private PdfDestination _defaultDestination;
private List _bookmarks = new ArrayList<>();
private final List _metadata = new ArrayList<>();
private Box _root;
private int _startPageNo;
private int _nextFormFieldIndex;
private Set _linkTargetAreas;
public ITextOutputDevice(float dotsPerPoint) {
_dotsPerPoint = dotsPerPoint;
}
public void setWriter(PdfWriter writer) {
_writer = writer;
}
public PdfWriter getWriter() {
return _writer;
}
public int getNextFormFieldIndex() {
return ++_nextFormFieldIndex;
}
public void initializePage(PdfContentByte currentPage, float height) {
_currentPage = currentPage;
_pageHeight = height;
_currentPage.saveState();
_transform = new AffineTransform();
_transform.scale(1.0d / _dotsPerPoint, 1.0d / _dotsPerPoint);
_stroke = transformStroke(STROKE_ONE);
_originalStroke = _stroke;
_oldStroke = _stroke;
setStrokeDiff(_stroke, null);
if (_defaultDestination == null) {
_defaultDestination = new PdfDestination(PdfDestination.FITH, height);
_defaultDestination.addPage(_writer.getPageReference(1));
}
_linkTargetAreas = new HashSet<>();
}
public void finishPage() {
_currentPage.restoreState();
}
@Override
public void paintReplacedElement(RenderingContext c, BlockBox box) {
ITextReplacedElement element = (ITextReplacedElement) box.getReplacedElement();
element.paint(c, this, box);
}
@Override
public void paintBackground(RenderingContext c, Box box) {
super.paintBackground(c, box);
processLink(c, box);
}
private com.itextpdf.text.Rectangle calcTotalLinkArea(RenderingContext c, Box box) {
Box current = box;
while (true) {
Box prev = current.getPreviousSibling();
if (prev == null || prev.getElement() != box.getElement()) {
break;
}
current = prev;
}
com.itextpdf.text.Rectangle result = createLocalTargetArea(c, current, true);
current = current.getNextSibling();
while (current != null && current.getElement() == box.getElement()) {
result = add(result, createLocalTargetArea(c, current, true));
current = current.getNextSibling();
}
return result;
}
private com.itextpdf.text.Rectangle add(com.itextpdf.text.Rectangle r1, com.itextpdf.text.Rectangle r2) {
float llx = Math.min(r1.getLeft(), r2.getLeft());
float urx = Math.max(r1.getRight(), r2.getRight());
float lly = Math.min(r1.getBottom(), r2.getBottom());
float ury = Math.max(r1.getTop(), r2.getTop());
return new com.itextpdf.text.Rectangle(llx, lly, urx, ury);
}
private String createRectKey(com.itextpdf.text.Rectangle rect) {
return rect.getLeft() + ":" + rect.getBottom() + ":" + rect.getRight() + ":" + rect.getTop();
}
private com.itextpdf.text.Rectangle checkLinkArea(RenderingContext c, Box box) {
com.itextpdf.text.Rectangle targetArea = calcTotalLinkArea(c, box);
String key = createRectKey(targetArea);
if (_linkTargetAreas.contains(key)) {
return null;
}
_linkTargetAreas.add(key);
return targetArea;
}
private void processLink(RenderingContext c, Box box) {
Element elem = box.getElement();
if (elem != null) {
NamespaceHandler handler = _sharedContext.getNamespaceHandler();
String uri = handler.getLinkUri(elem);
if (uri != null) {
if (uri.length() > 1 && uri.charAt(0) == '#') {
String anchor = uri.substring(1);
Box target = _sharedContext.getBoxById(anchor);
if (target != null) {
PdfDestination dest = createDestination(c, target);
PdfAction action = new PdfAction();
if (!handler.getAttributeValue(elem, "onclick").isEmpty()) {
action = PdfAction.javaScript(handler.getAttributeValue(elem, "onclick"), _writer);
} else {
action.put(PdfName.S, PdfName.GOTO);
action.put(PdfName.D, dest);
}
com.itextpdf.text.Rectangle targetArea = checkLinkArea(c, box);
if (targetArea == null) {
return;
}
targetArea.setBorder(0);
targetArea.setBorderWidth(0);
addLinkAnnotation(action, targetArea);
}
} else {
int boxTop = box.getAbsY();
int boxBottom = boxTop + box.getHeight();
int pageTop = c.getPage().getTop();
int pageBottom = c.getPage().getBottom();
if (boxTop < pageBottom && boxBottom > pageTop) {
PdfAction action = new PdfAction(uri);
com.itextpdf.text.Rectangle targetArea = checkLinkArea(c, box);
if (targetArea == null) {
return;
}
addLinkAnnotation(action, targetArea);
}
}
}
}
}
private void addLinkAnnotation(final PdfAction action, final com.itextpdf.text.Rectangle targetArea) {
PdfAnnotation annot = new PdfAnnotation(_writer, targetArea.getLeft(), targetArea.getBottom(),
targetArea.getRight(), targetArea.getTop(), action);
annot.put(PdfName.SUBTYPE, PdfName.LINK);
annot.put(PdfName.F, new PdfNumber(PdfAnnotation.FLAGS_PRINT));
annot.setBorderStyle(new PdfBorderDictionary(0.0f, 0));
annot.setBorder(new PdfBorderArray(0.0f, 0.0f, 0));
_writer.addAnnotation(annot);
}
public com.itextpdf.text.Rectangle createLocalTargetArea(RenderingContext c, Box box) {
return createLocalTargetArea(c, box, false);
}
private com.itextpdf.text.Rectangle createLocalTargetArea(RenderingContext c, Box box, boolean useAggregateBounds) {
Rectangle bounds;
if (useAggregateBounds && box.getPaintingInfo() != null) {
bounds = box.getPaintingInfo().getAggregateBounds();
} else {
bounds = box.getContentAreaEdge(box.getAbsX(), box.getAbsY(), c);
}
Point2D docCorner = new Point2D.Double(bounds.x, bounds.y + bounds.height);
Point2D pdfCorner = new Point2D.Double();
_transform.transform(docCorner, pdfCorner);
pdfCorner.setLocation(pdfCorner.getX(), normalizeY((float) pdfCorner.getY()));
return new com.itextpdf.text.Rectangle(
(float) pdfCorner.getX(),
(float) pdfCorner.getY(),
(float) pdfCorner.getX() + getDeviceLength(bounds.width),
(float) pdfCorner.getY() + getDeviceLength(bounds.height)
);
}
public com.itextpdf.text.Rectangle createTargetArea(RenderingContext c, Box box) {
PageBox current = c.getPage();
boolean inCurrentPage = box.getAbsY() > current.getTop() && box.getAbsY() < current.getBottom();
if (inCurrentPage || box.isContainedInMarginBox()) {
return createLocalTargetArea(c, box);
} else {
Rectangle bounds = box.getContentAreaEdge(box.getAbsX(), box.getAbsY(), c);
PageBox page = _root.getLayer().getPage(c, bounds.y);
float bottom = getDeviceLength(page.getBottom() - (bounds.y + bounds.height)
+ page.getMarginBorderPadding(c, CalculatedStyle.BOTTOM));
float left = getDeviceLength(page.getMarginBorderPadding(c, CalculatedStyle.LEFT) + bounds.x);
return new com.itextpdf.text.Rectangle(left, bottom,
left + getDeviceLength(bounds.width),
bottom + getDeviceLength(bounds.height));
}
}
public float getDeviceLength(float length) {
return length / _dotsPerPoint;
}
private PdfDestination createDestination(RenderingContext c, Box box) {
PdfDestination result;
PageBox page = _root.getLayer().getPage(c, getPageRefY(box));
int distanceFromTop = page.getMarginBorderPadding(c, CalculatedStyle.TOP);
distanceFromTop += box.getAbsY() + box.getMargin(c).top() - page.getTop();
result = new PdfDestination(PdfDestination.XYZ, 0, page.getHeight(c) / _dotsPerPoint - distanceFromTop / _dotsPerPoint, 0);
result.addPage(_writer.getPageReference(_startPageNo + page.getPageNo() + 1));
return result;
}
@Override
public void drawBorderLine(Shape bounds, int side, int lineWidth, boolean solid) {
/*float x = bounds.x;
float y = bounds.y;
float w = bounds.width;
float h = bounds.height;
float adj = solid ? (float) lineWidth / 2 : 0;
float adj2 = lineWidth % 2 != 0 ? 0.5f : 0f;
Line2D.Float line = null;
// FIXME: findbugs reports possible loss of precision, compare with
// width / (float)2
if (side == BorderPainter.TOP) {
line = new Line2D.Float(x + adj, y + lineWidth / 2 + adj2, x + w - adj, y + lineWidth / 2 + adj2);
} else if (side == BorderPainter.LEFT) {
line = new Line2D.Float(x + lineWidth / 2 + adj2, y + adj, x + lineWidth / 2 + adj2, y + h - adj);
} else if (side == BorderPainter.RIGHT) {
float offset = lineWidth / 2;
if (lineWidth % 2 != 0) {
offset += 1;
}
line = new Line2D.Float(x + w - offset + adj2, y + adj, x + w - offset + adj2, y + h - adj);
} else if (side == BorderPainter.BOTTOM) {
float offset = lineWidth / 2;
if (lineWidth % 2 != 0) {
offset += 1;
}
line = new Line2D.Float(x + adj, y + h - offset + adj2, x + w - adj, y + h - offset + adj2);
}*/
draw(bounds);
}
@Override
public void setColor(FSColor color) {
if (color instanceof FSRGBColor rgb) {
_color = new BaseColor(rgb.getRed(), rgb.getGreen(), rgb.getBlue());
} else if (color instanceof FSCMYKColor cmyk) {
_color = new CMYKColor(cmyk.getCyan(), cmyk.getMagenta(), cmyk.getYellow(), cmyk.getBlack());
} else {
throw new RuntimeException("internal error: unsupported color class " + color.getClass().getName());
}
}
@Override
public void draw(Shape s) {
followPath(s, STROKE);
}
@Override
protected void drawLine(int x1, int y1, int x2, int y2) {
Line2D line = new Line2D.Double(x1, y1, x2, y2);
draw(line);
}
@Override
public void drawRect(int x, int y, int width, int height) {
draw(new Rectangle(x, y, width, height));
}
@Override
public void drawOval(int x, int y, int width, int height) {
Ellipse2D oval = new Ellipse2D.Float(x, y, width, height);
draw(oval);
}
@Override
public void fill(Shape s) {
followPath(s, FILL);
}
@Override
public void fillRect(int x, int y, int width, int height) {
if (ROUND_RECT_DIMENSIONS_DOWN) {
fill(new Rectangle(x, y, width - 1, height - 1));
} else {
fill(new Rectangle(x, y, width, height));
}
}
@Override
public void fillOval(int x, int y, int width, int height) {
Ellipse2D oval = new Ellipse2D.Float(x, y, width, height);
fill(oval);
}
@Override
public void translate(double tx, double ty) {
_transform.translate(tx, ty);
}
@Override
public Object getRenderingHint(Key key) {
return null;
}
@Override
public void setRenderingHint(Key key, Object value) {
}
@Override
public void setFont(FSFont font) {
_font = ((ITextFSFont) font);
}
private AffineTransform normalizeMatrix(AffineTransform current) {
double[] mx = new double[6];
AffineTransform result = new AffineTransform();
result.getMatrix(mx);
mx[3] = -1;
mx[5] = _pageHeight;
result = new AffineTransform(mx);
result.concatenate(current);
return result;
}
public void drawString(String s, float x, float y, JustificationInfo info) {
if (Configuration.isTrue("xr.renderer.replace-missing-characters", false)) {
s = replaceMissingCharacters(s);
}
if (s.isEmpty())
return;
PdfContentByte cb = _currentPage;
ensureFillColor();
AffineTransform at = (AffineTransform) getTransform().clone();
at.translate(x, y);
AffineTransform inverse = normalizeMatrix(at);
AffineTransform flipper = AffineTransform.getScaleInstance(1, -1);
inverse.concatenate(flipper);
inverse.scale(_dotsPerPoint, _dotsPerPoint);
double[] mx = new double[6];
inverse.getMatrix(mx);
cb.beginText();
// Check if bold or italic need to be emulated
boolean resetMode = false;
FontDescription desc = _font.getFontDescription();
float fontSize = _font.getSize2D() / _dotsPerPoint;
cb.setFontAndSize(desc.getFont(), fontSize);
float b = (float) mx[1];
float c = (float) mx[2];
FontSpecification fontSpec = getFontSpecification();
if (fontSpec != null) {
int need = ITextFontResolver.convertWeightToInt(fontSpec.fontWeight);
int have = desc.getWeight();
if (need > have) {
cb.setTextRenderingMode(PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE);
float lineWidth = fontSize * 0.04f; // 4% of font size
cb.setLineWidth(lineWidth);
resetMode = true;
ensureStrokeColor();
}
if ((fontSpec.fontStyle == IdentValue.ITALIC) && (desc.getStyle() != IdentValue.ITALIC) && (desc.getStyle() != IdentValue.OBLIQUE)) {
b = 0.0f;
c = 0.21256f;
}
}
cb.setTextMatrix((float) mx[0], b, c, (float) mx[3], (float) mx[4], (float) mx[5]);
if (info == null) {
cb.showText(s);
} else {
PdfTextArray array = makeJustificationArray(s, info);
cb.showText(array);
}
if (resetMode) {
cb.setTextRenderingMode(PdfContentByte.TEXT_RENDER_MODE_FILL);
cb.setLineWidth(1);
}
cb.endText();
}
private String replaceMissingCharacters(String string) {
char[] charArr = string.toCharArray();
char replacementCharacter = Configuration.valueAsChar("xr.renderer.missing-character-replacement", '#');
// first check to see if the replacement character even exists in the
// given font. If not, then do nothing.
if (!_font.getFontDescription().getFont().charExists(replacementCharacter)) {
XRLog.render(Level.INFO, "Missing replacement character [" + replacementCharacter + ":" + (int) replacementCharacter
+ "]. No replacement will occur.");
return string;
}
// iterate through each character in the string and make an appropriate
// replacement
for (int i = 0; i < charArr.length; i++) {
if (!(charArr[i] == ' ' || charArr[i] == '\u00a0' || charArr[i] == '\u3000' || _font.getFontDescription().getFont()
.charExists(charArr[i]))) {
XRLog.render(Level.INFO, "Missing character [" + charArr[i] + ":" + (int) charArr[i] + "] in string [" + string
+ "]. Replacing with '" + replacementCharacter + "'");
charArr[i] = replacementCharacter;
}
}
return String.valueOf(charArr);
}
private PdfTextArray makeJustificationArray(String s, JustificationInfo info) {
PdfTextArray array = new PdfTextArray();
int len = s.length();
for (int i = 0; i < len; i++) {
char c = s.charAt(i);
array.add(Character.toString(c));
if (i != len - 1) {
float offset;
if (c == ' ' || c == '\u00a0' || c == '\u3000') {
offset = info.getSpaceAdjust();
} else {
offset = info.getNonSpaceAdjust();
}
array.add((-offset / _dotsPerPoint) * 1000 / (_font.getSize2D() / _dotsPerPoint));
}
}
return array;
}
public AffineTransform getTransform() {
return _transform;
}
private void ensureFillColor() {
if (!(_color.equals(_fillColor))) {
_fillColor = _color;
_currentPage.setColorFill(_fillColor);
}
}
private void ensureStrokeColor() {
if (!(_color.equals(_strokeColor))) {
_strokeColor = _color;
_currentPage.setColorStroke(_strokeColor);
}
}
public PdfContentByte getCurrentPage() {
return _currentPage;
}
private void followPath(Shape s, int drawType) {
PdfContentByte cb = _currentPage;
if (s == null)
return;
if (drawType == STROKE) {
if (!(_stroke instanceof BasicStroke)) {
s = _stroke.createStrokedShape(s);
followPath(s, FILL);
return;
}
}
if (drawType == STROKE) {
setStrokeDiff(_stroke, _oldStroke);
_oldStroke = _stroke;
ensureStrokeColor();
} else if (drawType == FILL) {
ensureFillColor();
}
PathIterator points;
if (drawType == CLIP) {
points = s.getPathIterator(IDENTITY);
} else {
points = s.getPathIterator(_transform);
}
float[] coords = new float[6];
int traces = 0;
while (!points.isDone()) {
++traces;
int segmentType = points.currentSegment(coords);
normalizeY(coords);
switch (segmentType) {
case PathIterator.SEG_CLOSE:
cb.closePath();
break;
case PathIterator.SEG_CUBICTO:
cb.curveTo(coords[0], coords[1], coords[2], coords[3], coords[4], coords[5]);
break;
case PathIterator.SEG_LINETO:
cb.lineTo(coords[0], coords[1]);
break;
case PathIterator.SEG_MOVETO:
cb.moveTo(coords[0], coords[1]);
break;
case PathIterator.SEG_QUADTO:
cb.curveTo(coords[0], coords[1], coords[2], coords[3]);
break;
}
points.next();
}
switch (drawType) {
case FILL:
if (traces > 0) {
if (points.getWindingRule() == PathIterator.WIND_EVEN_ODD)
cb.eoFill();
else
cb.fill();
}
break;
case STROKE:
if (traces > 0)
cb.stroke();
break;
default: // drawType==CLIP
if (traces == 0)
cb.rectangle(0, 0, 0, 0);
if (points.getWindingRule() == PathIterator.WIND_EVEN_ODD)
cb.eoClip();
else
cb.clip();
cb.newPath();
}
}
private float normalizeY(float y) {
return _pageHeight - y;
}
private void normalizeY(float[] coords) {
coords[1] = normalizeY(coords[1]);
coords[3] = normalizeY(coords[3]);
coords[5] = normalizeY(coords[5]);
}
private void setStrokeDiff(Stroke newStroke, Stroke oldStroke) {
PdfContentByte cb = _currentPage;
if (newStroke == oldStroke)
return;
if (!(newStroke instanceof BasicStroke nStroke))
return;
boolean oldOk = (oldStroke instanceof BasicStroke);
BasicStroke oStroke = null;
if (oldOk)
oStroke = (BasicStroke) oldStroke;
if (!oldOk || nStroke.getLineWidth() != oStroke.getLineWidth())
cb.setLineWidth(nStroke.getLineWidth());
if (!oldOk || nStroke.getEndCap() != oStroke.getEndCap()) {
switch (nStroke.getEndCap()) {
case BasicStroke.CAP_BUTT:
cb.setLineCap(0);
break;
case BasicStroke.CAP_SQUARE:
cb.setLineCap(2);
break;
default:
cb.setLineCap(1);
}
}
if (!oldOk || nStroke.getLineJoin() != oStroke.getLineJoin()) {
switch (nStroke.getLineJoin()) {
case BasicStroke.JOIN_MITER:
cb.setLineJoin(0);
break;
case BasicStroke.JOIN_BEVEL:
cb.setLineJoin(2);
break;
default:
cb.setLineJoin(1);
}
}
if (!oldOk || nStroke.getMiterLimit() != oStroke.getMiterLimit())
cb.setMiterLimit(nStroke.getMiterLimit());
boolean makeDash = isMakeDash(oldOk, nStroke, oStroke);
if (makeDash) {
float[] dash = nStroke.getDashArray();
if (dash == null)
cb.setLiteral("[]0 d\n");
else {
cb.setLiteral('[');
for (float v : dash) {
cb.setLiteral(v);
cb.setLiteral(' ');
}
cb.setLiteral(']');
cb.setLiteral(nStroke.getDashPhase());
cb.setLiteral(" d\n");
}
}
}
private boolean isMakeDash(boolean oldOk, BasicStroke nStroke, BasicStroke oStroke) {
if (oldOk) {
if (nStroke.getDashArray() != null) {
if (nStroke.getDashPhase() != oStroke.getDashPhase()) {
return true;
} else {
return !Arrays.equals(nStroke.getDashArray(), oStroke.getDashArray());
}
} else {
return oStroke.getDashArray() != null;
}
} else {
return true;
}
}
@Override
public void setStroke(Stroke s) {
_originalStroke = s;
this._stroke = transformStroke(s);
}
private Stroke transformStroke(Stroke stroke) {
if (!(stroke instanceof BasicStroke st))
return stroke;
float scale = (float) Math.sqrt(Math.abs(_transform.getDeterminant()));
float[] dash = st.getDashArray();
if (dash != null) {
for (int k = 0; k < dash.length; ++k)
dash[k] *= scale;
}
return new BasicStroke(st.getLineWidth() * scale, st.getEndCap(), st.getLineJoin(), st.getMiterLimit(), dash, st.getDashPhase()
* scale);
}
@Override
public void clip(Shape s) {
if (s != null) {
s = _transform.createTransformedShape(s);
if (_clip == null)
_clip = new Area(s);
else
_clip.intersect(new Area(s));
followPath(s, CLIP);
} else {
throw new XRRuntimeException("Shape is null, unexpected");
}
}
@Override
public Shape getClip() {
try {
return _transform.createInverse().createTransformedShape(_clip);
} catch (NoninvertibleTransformException e) {
return null;
}
}
@Override
public void setClip(Shape s) {
PdfContentByte cb = _currentPage;
cb.restoreState();
cb.saveState();
if (s != null)
s = _transform.createTransformedShape(s);
if (s == null) {
_clip = null;
} else {
_clip = new Area(s);
followPath(s, CLIP);
}
_fillColor = null;
_strokeColor = null;
_oldStroke = null;
}
@Override
public Stroke getStroke() {
return _originalStroke;
}
@Override
public void drawImage(FSImage fsImage, int x, int y) {
if (fsImage instanceof PDFAsImage) {
drawPDFAsImage((PDFAsImage) fsImage, x, y);
} else {
Image image = ((ITextFSImage) fsImage).getImage();
if (fsImage.getHeight() <= 0 || fsImage.getWidth() <= 0) {
return;
}
AffineTransform at = AffineTransform.getTranslateInstance(x, y);
at.translate(0, fsImage.getHeight());
at.scale(fsImage.getWidth(), fsImage.getHeight());
AffineTransform inverse = normalizeMatrix(_transform);
AffineTransform flipper = AffineTransform.getScaleInstance(1, -1);
inverse.concatenate(at);
inverse.concatenate(flipper);
double[] mx = new double[6];
inverse.getMatrix(mx);
try {
_currentPage.addImage(image, (float) mx[0], (float) mx[1], (float) mx[2], (float) mx[3], (float) mx[4], (float) mx[5]);
} catch (DocumentException e) {
throw new XRRuntimeException(e.getMessage(), e);
}
}
}
private void drawPDFAsImage(PDFAsImage image, int x, int y) {
URI uri = image.getURI();
PdfReader reader;
int pageNumber;
try {
reader = getReader(uri);
pageNumber = PDFAsImage.pageNumberFromURI(uri);
} catch (IOException e) {
throw new XRRuntimeException("Could not load " + uri + ": " + e.getMessage(), e);
}
PdfImportedPage page = getWriter().getImportedPage(reader, pageNumber);
AffineTransform at = AffineTransform.getTranslateInstance(x, y);
at.translate(0, image.getHeightAsFloat());
at.scale(image.getWidthAsFloat(), image.getHeightAsFloat());
AffineTransform inverse = normalizeMatrix(_transform);
AffineTransform flipper = AffineTransform.getScaleInstance(1, -1);
inverse.concatenate(at);
inverse.concatenate(flipper);
double[] mx = new double[6];
inverse.getMatrix(mx);
mx[0] = image.scaleWidth();
mx[3] = image.scaleHeight();
_currentPage.restoreState();
_currentPage.addTemplate(page, (float) mx[0], (float) mx[1], (float) mx[2], (float) mx[3], (float) mx[4], (float) mx[5]);
_currentPage.saveState();
}
public PdfReader getReader(URI uri) throws IOException {
PdfReader result = _readerCache.get(uri.getPath());
if (result == null) {
result = new PdfReader(getSharedContext().getUserAgentCallback().getBinaryResource(uri.toString()));
_readerCache.put(uri.getPath(), result);
}
return result;
}
public float getDotsPerPoint() {
return _dotsPerPoint;
}
public void start(Document doc) {
loadBookmarks(doc);
loadMetadata(doc);
}
public void finish(RenderingContext c, Box root) {
writeOutline(c, root);
}
private void writeOutline(RenderingContext c, Box root) {
if (_bookmarks.isEmpty()) {
_bookmarks = HTMLOutline.generate(root.getElement(), root);
}
if (!_bookmarks.isEmpty()) {
_writer.setViewerPreferences(PdfWriter.PageModeUseOutlines);
writeBookmarks(c, root, _writer.getRootOutline(), _bookmarks);
}
}
private void writeBookmarks(RenderingContext c, Box root, PdfOutline parent, List bookmarks) {
for (Bookmark bookmark : bookmarks) {
writeBookmark(c, root, parent, bookmark);
}
}
private int getPageRefY(Box box) {
if (box instanceof InlineLayoutBox iB) {
return iB.getAbsY() + iB.getBaseline();
} else {
return box.getAbsY();
}
}
private void writeBookmark(RenderingContext c, Box root, PdfOutline parent, Bookmark bookmark) {
String href = bookmark.getHRef();
PdfDestination target = null;
Box box = bookmark.getBox();
if (!href.isEmpty() && href.charAt(0) == '#') {
box = _sharedContext.getBoxById(href.substring(1));
}
if (box != null) {
PageBox page = root.getLayer().getPage(c, getPageRefY(box));
int distanceFromTop = page.getMarginBorderPadding(c, CalculatedStyle.TOP);
distanceFromTop += box.getAbsY() - page.getTop();
target = new PdfDestination(PdfDestination.XYZ, 0, normalizeY(distanceFromTop / _dotsPerPoint), 0);
target.addPage(_writer.getPageReference(_startPageNo + page.getPageNo() + 1));
}
if (target == null) {
target = _defaultDestination;
}
PdfOutline outline = new PdfOutline(parent, target, bookmark.getName());
writeBookmarks(c, root, outline, bookmark.getChildren());
}
private void loadBookmarks(Document doc) {
Element head = DOMUtil.getChild(doc.getDocumentElement(), "head");
if (head != null) {
Element bookmarks = DOMUtil.getChild(head, "bookmarks");
if (bookmarks != null) {
List l = DOMUtil.getChildren(bookmarks, "bookmark");
if (l != null) {
for (Element e : l) {
loadBookmark(null, e);
}
}
}
}
}
private void loadBookmark(Bookmark parent, Element bookmark) {
Bookmark us = new Bookmark(bookmark.getAttribute("name"), bookmark.getAttribute("href"));
if (parent == null) {
_bookmarks.add(us);
} else {
parent.addChild(us);
}
List l = DOMUtil.getChildren(bookmark, "bookmark");
if (l != null) {
for (Element e : l) {
loadBookmark(us, e);
}
}
}
static class Bookmark {
private final String _name;
private final String _href;
private Box _box;
private List _children;
Bookmark(String name, String href) {
_name = name;
_href = href;
}
public Box getBox() {
return _box;
}
public void setBox(Box box) {
_box = box;
}
public String getHRef() {
return _href;
}
public String getName() {
return _name;
}
public void addChild(Bookmark child) {
if (_children == null) {
_children = new ArrayList<>();
}
_children.add(child);
}
public List getChildren() {
return _children == null ? emptyList() : _children;
}
}
// Metadata methods
// Methods to load and search a document's metadata
/**
* Appends a name/content metadata pair to this output device. A name or
* content value of null will be ignored.
*
* @param name
* the name of the metadata element to add.
*/
public void addMetadata(String name, String value) {
if ((name != null) && (value != null)) {
Metadata m = new Metadata(name, value);
_metadata.add(m);
}
}
/**
* Searches the metadata name/content pairs of the current document and
* returns the content value from the first pair with a matching name. The
* search is case-insensitive.
*
* @param name
* the metadata element name to locate.
* @return the content value of the first found metadata element; otherwise
* null.
*/
public String getMetadataByName(String name) {
if (name != null) {
for (Metadata m : _metadata) {
if ((m != null) && m.getName().equalsIgnoreCase(name)) {
return m.getContent();
}
}
}
return null;
}
/**
* Searches the metadata name/content pairs of the current document and
* returns any content values with a matching name in an ArrayList. The
* search is case-insensitive.
*
* @param name
* the metadata element name to locate.
* @return an ArrayList with matching content values; otherwise an empty
* list.
*/
public List getMetadataListByName(String name) {
List result = new ArrayList<>();
if (name != null) {
for (Metadata m : _metadata) {
if ((m != null) && m.getName().equalsIgnoreCase(name)) {
result.add(m.getContent());
}
}
}
return result;
}
/**
* Locates and stores all metadata values in the document head that contain
* name/content pairs. If there is no pair with a name of "title", any
* content in the title element is saved as a "title" metadata item.
*
* @param doc
* the Document level node of the parsed xhtml file.
*/
private void loadMetadata(Document doc) {
Element head = DOMUtil.getChild(doc.getDocumentElement(), "head");
if (head != null) {
List l = DOMUtil.getChildren(head, "meta");
if (l != null) {
for (Element e : l) {
String name = e.getAttribute("name");
String content = e.getAttribute("content");
Metadata m = new Metadata(name, content);
_metadata.add(m);
}
}
// If there is no title metadata attribute, use the document title.
String title = getMetadataByName("title");
if (title == null) {
Element t = DOMUtil.getChild(head, "title");
if (t != null) {
title = DOMUtil.getText(t).trim();
Metadata m = new Metadata("title", title);
_metadata.add(m);
}
}
}
}
/**
* Replaces all copies of the named metadata with a single value. A new
* value of null will result in the removal of all copies of the named
* metadata. Use {@code addMetadata} to append additional values with
* the same name.
*
* @param name
* the metadata element name to locate.
*/
public void setMetadata(String name, String value) {
if (name != null) {
boolean remove = (value == null); // removing all instances of name?
int free = -1; // first open slot in array
for (int i = 0, len = _metadata.size(); i < len; i++) {
Metadata m = _metadata.get(i);
if (m != null) {
if (m.getName().equalsIgnoreCase(name)) {
if (!remove) {
remove = true; // remove all other instances
m.setContent(value);
} else {
_metadata.set(i, null);
}
}
} else if (free == -1) {
free = i;
}
}
if (!remove) { // not found?
Metadata m = new Metadata(name, value);
if (free == -1) { // no open slots?
_metadata.add(m);
} else {
_metadata.set(free, m);
}
}
}
}
// Class for storing metadata element name/content pairs from the head
// section of xhtml document.
private static class Metadata {
private final String _name;
private String _content;
private Metadata(String name, String content) {
_name = name;
_content = content;
}
String getContent() {
return _content;
}
private void setContent(String content) {
_content = content;
}
String getName() {
return _name;
}
}
// Metadata end
public SharedContext getSharedContext() {
return _sharedContext;
}
public void setSharedContext(SharedContext sharedContext) {
_sharedContext = sharedContext;
sharedContext.getCss().setSupportCMYKColors(true);
}
public void setRoot(Box root) {
_root = root;
}
public int getStartPageNo() {
return _startPageNo;
}
public void setStartPageNo(int startPageNo) {
_startPageNo = startPageNo;
}
@Override
public void drawSelection(RenderingContext c, InlineText inlineText) {
throw new UnsupportedOperationException("Unsupported operation: drawSelection");
}
@Override
public boolean isSupportsSelection() {
return false;
}
@Override
public boolean isSupportsCMYKColors() {
return true;
}
public List findPagePositionsByID(CssContext c, Pattern pattern) {
Map idMap = _sharedContext.getIdMap();
if (idMap == null) {
return emptyList();
}
List result = new ArrayList<>();
for (Entry entry : idMap.entrySet()) {
String id = entry.getKey();
if (pattern.matcher(id).find()) {
Box box = entry.getValue();
PagePosition pos = calcPDFPagePosition(c, id, box);
if (pos != null) {
result.add(pos);
}
}
}
result.sort(comparingInt(PagePosition::getPageNo));
return result;
}
private PagePosition calcPDFPagePosition(CssContext c, String id, Box box) {
PageBox page = _root.getLayer().getLastPage(c, box);
if (page == null) {
return null;
}
float x = box.getAbsX() + page.getMarginBorderPadding(c, CalculatedStyle.LEFT);
float y = (page.getBottom() - (box.getAbsY() + box.getHeight())) + page.getMarginBorderPadding(c, CalculatedStyle.BOTTOM);
x /= _dotsPerPoint;
y /= _dotsPerPoint;
PagePosition result = new PagePosition();
result.setId(id);
result.setPageNo(page.getPageNo());
result.setX(x);
result.setY(y);
result.setWidth(box.getEffectiveWidth() / _dotsPerPoint);
result.setHeight(box.getHeight() / _dotsPerPoint);
return result;
}
}
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