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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- /* $Id$ */
-
- package org.apache.fop.render.pdf;
-
- import java.awt.Color;
- import java.awt.Dimension;
- import java.awt.Paint;
- import java.awt.Point;
- import java.awt.Rectangle;
- import java.awt.geom.AffineTransform;
- import java.io.IOException;
-
- import org.w3c.dom.Document;
-
- import org.apache.fop.fonts.Font;
- import org.apache.fop.fonts.FontInfo;
- import org.apache.fop.fonts.FontTriplet;
- import org.apache.fop.fonts.LazyFont;
- import org.apache.fop.fonts.SingleByteFont;
- import org.apache.fop.fonts.Typeface;
- import org.apache.fop.pdf.PDFDocument;
- import org.apache.fop.pdf.PDFNumber;
- import org.apache.fop.pdf.PDFStructElem;
- import org.apache.fop.pdf.PDFTextUtil;
- import org.apache.fop.pdf.PDFXObject;
- import org.apache.fop.render.RenderingContext;
- import org.apache.fop.render.intermediate.AbstractIFPainter;
- import org.apache.fop.render.intermediate.IFContext;
- import org.apache.fop.render.intermediate.IFException;
- import org.apache.fop.render.intermediate.IFState;
- import org.apache.fop.render.pdf.PDFLogicalStructureHandler.MarkedContentInfo;
- import org.apache.fop.traits.BorderProps;
- import org.apache.fop.traits.RuleStyle;
- import org.apache.fop.util.CharUtilities;
-
- /**
- * IFPainter implementation that produces PDF.
- */
- public class PDFPainter extends AbstractIFPainter {
-
- private final PDFDocumentHandler documentHandler;
-
- /** The current content generator */
- protected PDFContentGenerator generator;
-
- private final PDFBorderPainter borderPainter;
-
- private boolean accessEnabled;
-
- private MarkedContentInfo imageMCI;
-
- private PDFLogicalStructureHandler logicalStructureHandler;
-
- /**
- * Default constructor.
- * @param documentHandler the parent document handler
- * @param logicalStructureHandler the logical structure handler
- */
- public PDFPainter(PDFDocumentHandler documentHandler,
- PDFLogicalStructureHandler logicalStructureHandler) {
- super();
- this.documentHandler = documentHandler;
- this.logicalStructureHandler = logicalStructureHandler;
- this.generator = documentHandler.generator;
- this.borderPainter = new PDFBorderPainter(this.generator);
- this.state = IFState.create();
- accessEnabled = this.getUserAgent().isAccessibilityEnabled();
- }
-
- /** {@inheritDoc} */
- @Override
- protected IFContext getContext() {
- return this.documentHandler.getContext();
- }
-
- PDFRenderingUtil getPDFUtil() {
- return this.documentHandler.pdfUtil;
- }
-
- PDFDocument getPDFDoc() {
- return this.documentHandler.pdfDoc;
- }
-
- FontInfo getFontInfo() {
- return this.documentHandler.getFontInfo();
- }
-
- /** {@inheritDoc} */
- public void startViewport(AffineTransform transform, Dimension size, Rectangle clipRect)
- throws IFException {
- generator.saveGraphicsState();
- generator.concatenate(toPoints(transform));
- if (clipRect != null) {
- clipRect(clipRect);
- }
- }
-
- /** {@inheritDoc} */
- public void endViewport() throws IFException {
- generator.restoreGraphicsState();
- }
-
- /** {@inheritDoc} */
- public void startGroup(AffineTransform transform) throws IFException {
- generator.saveGraphicsState();
- generator.concatenate(toPoints(transform));
- }
-
- /** {@inheritDoc} */
- public void endGroup() throws IFException {
- generator.restoreGraphicsState();
- }
-
- /** {@inheritDoc} */
- public void drawImage(String uri, Rectangle rect)
- throws IFException {
- PDFXObject xobject = getPDFDoc().getXObject(uri);
- if (xobject != null) {
- if (accessEnabled) {
- PDFStructElem structElem = (PDFStructElem) getContext().getStructureTreeElement();
- prepareImageMCID(structElem);
- placeImageAccess(rect, xobject);
- } else {
- placeImage(rect, xobject);
- }
- } else {
- if (accessEnabled) {
- PDFStructElem structElem = (PDFStructElem) getContext().getStructureTreeElement();
- prepareImageMCID(structElem);
- }
- drawImageUsingURI(uri, rect);
- flushPDFDoc();
- }
- }
-
- private void prepareImageMCID(PDFStructElem structElem) {
- imageMCI = logicalStructureHandler.addImageContentItem(structElem);
- }
-
- /** {@inheritDoc} */
- @Override
- protected RenderingContext createRenderingContext() {
- PDFRenderingContext pdfContext = new PDFRenderingContext(
- getUserAgent(), generator, this.documentHandler.currentPage, getFontInfo());
- pdfContext.setMarkedContentInfo(imageMCI);
- return pdfContext;
- }
-
- /**
- * Places a previously registered image at a certain place on the page.
- * @param rect the rectangle for the image
- * @param xobj the image XObject
- */
- private void placeImage(Rectangle rect, PDFXObject xobj) {
- generator.saveGraphicsState();
- generator.add(format(rect.width) + " 0 0 "
- + format(-rect.height) + " "
- + format(rect.x) + " "
- + format(rect.y + rect.height )
- + " cm " + xobj.getName() + " Do\n");
- generator.restoreGraphicsState();
- }
- /**
- * Places a previously registered image at a certain place on the page - Accessibility version
- * @param rect the rectangle for the image
- * @param xobj the image XObject
- */
- private void placeImageAccess(Rectangle rect, PDFXObject xobj) {
- generator.saveGraphicsState(imageMCI.tag, imageMCI.mcid);
- generator.add(format(rect.width) + " 0 0 "
- + format(-rect.height) + " "
- + format(rect.x) + " "
- + format(rect.y + rect.height )
- + " cm " + xobj.getName() + " Do\n");
- generator.restoreGraphicsStateAccess();
- }
-
- /** {@inheritDoc} */
- public void drawImage(Document doc, Rectangle rect) throws IFException {
- if (accessEnabled) {
- PDFStructElem structElem = (PDFStructElem) getContext().getStructureTreeElement();
- prepareImageMCID(structElem);
- }
- drawImageUsingDocument(doc, rect);
- flushPDFDoc();
- }
-
- private void flushPDFDoc() throws IFException {
- // output new data
- try {
- generator.flushPDFDoc();
- } catch (IOException ioe) {
- throw new IFException("I/O error flushing the PDF document", ioe);
- }
- }
-
- /**
- * Formats a integer value (normally coordinates in millipoints) to a String.
- * @param value the value (in millipoints)
- * @return the formatted value
- */
- protected static String format(int value) {
- return PDFNumber.doubleOut(value / 1000f);
- }
-
- /** {@inheritDoc} */
- public void clipRect(Rectangle rect) throws IFException {
- generator.endTextObject();
- generator.clipRect(rect);
- }
-
- /** {@inheritDoc} */
- public void fillRect(Rectangle rect, Paint fill) throws IFException {
- if (fill == null) {
- return;
- }
- if (rect.width != 0 && rect.height != 0) {
- generator.endTextObject();
- if (fill != null) {
- if (fill instanceof Color) {
- generator.updateColor((Color)fill, true, null);
- } else {
- throw new UnsupportedOperationException("Non-Color paints NYI");
- }
- }
- StringBuffer sb = new StringBuffer();
- sb.append(format(rect.x)).append(' ');
- sb.append(format(rect.y)).append(' ');
- sb.append(format(rect.width)).append(' ');
- sb.append(format(rect.height)).append(" re");
- if (fill != null) {
- sb.append(" f");
- }
- /* Removed from method signature as it is currently not used
- if (stroke != null) {
- sb.append(" S");
- }*/
- sb.append('\n');
- generator.add(sb.toString());
- }
- }
-
- /** {@inheritDoc} */
- @Override
- public void drawBorderRect(Rectangle rect, BorderProps before, BorderProps after,
- BorderProps start, BorderProps end) throws IFException {
- if (before != null || after != null || start != null || end != null) {
- generator.endTextObject();
- try {
- this.borderPainter.drawBorders(rect, before, after, start, end);
- } catch (IOException ioe) {
- throw new IFException("I/O error while drawing borders", ioe);
- }
- }
- }
-
- /** {@inheritDoc} */
- @Override
- public void drawLine(Point start, Point end, int width, Color color, RuleStyle style)
- throws IFException {
- generator.endTextObject();
- this.borderPainter.drawLine(start, end, width, color, style);
- }
-
- private Typeface getTypeface(String fontName) {
- if (fontName == null) {
- throw new NullPointerException("fontName must not be null");
- }
- Typeface tf = getFontInfo().getFonts().get(fontName);
- if (tf instanceof LazyFont) {
- tf = ((LazyFont)tf).getRealFont();
- }
- return tf;
- }
-
- /** {@inheritDoc} */
- public void drawText(int x, int y, int letterSpacing, int wordSpacing, int[] dx,
- String text)
- throws IFException {
- if (accessEnabled) {
- PDFStructElem structElem = (PDFStructElem) getContext().getStructureTreeElement();
- MarkedContentInfo mci = logicalStructureHandler.addTextContentItem(structElem);
- if (generator.getTextUtil().isInTextObject()) {
- generator.separateTextElements(mci.tag, mci.mcid);
- }
- generator.updateColor(state.getTextColor(), true, null);
- generator.beginTextObject(mci.tag, mci.mcid);
- } else {
- generator.updateColor(state.getTextColor(), true, null);
- generator.beginTextObject();
- }
-
- FontTriplet triplet = new FontTriplet(
- state.getFontFamily(), state.getFontStyle(), state.getFontWeight());
- //TODO Ignored: state.getFontVariant()
- //TODO Opportunity for font caching if font state is more heavily used
- String fontKey = getFontInfo().getInternalFontKey(triplet);
- int sizeMillipoints = state.getFontSize();
- float fontSize = sizeMillipoints / 1000f;
-
- // This assumes that *all* CIDFonts use a /ToUnicode mapping
- Typeface tf = getTypeface(fontKey);
- SingleByteFont singleByteFont = null;
- if (tf instanceof SingleByteFont) {
- singleByteFont = (SingleByteFont)tf;
- }
- Font font = getFontInfo().getFontInstance(triplet, sizeMillipoints);
- String fontName = font.getFontName();
-
- PDFTextUtil textutil = generator.getTextUtil();
- textutil.updateTf(fontKey, fontSize, tf.isMultiByte());
-
- generator.updateCharacterSpacing(letterSpacing / 1000f);
-
- textutil.writeTextMatrix(new AffineTransform(1, 0, 0, -1, x / 1000f, y / 1000f));
- int l = text.length();
- int dxl = (dx != null ? dx.length : 0);
-
- if (dx != null && dxl > 0 && dx[0] != 0) {
- textutil.adjustGlyphTJ(-dx[0] / fontSize);
- }
- for (int i = 0; i < l; i++) {
- char orgChar = text.charAt(i);
- char ch;
- float glyphAdjust = 0;
- if (font.hasChar(orgChar)) {
- ch = font.mapChar(orgChar);
- ch = selectAndMapSingleByteFont(singleByteFont, fontName, fontSize, textutil, ch);
- if ((wordSpacing != 0) && CharUtilities.isAdjustableSpace(orgChar)) {
- glyphAdjust += wordSpacing;
- }
- } else {
- if (CharUtilities.isFixedWidthSpace(orgChar)) {
- //Fixed width space are rendered as spaces so copy/paste works in a reader
- ch = font.mapChar(CharUtilities.SPACE);
- int spaceDiff = font.getCharWidth(ch) - font.getCharWidth(orgChar);
- glyphAdjust = -spaceDiff;
- } else {
- ch = font.mapChar(orgChar);
- if ((wordSpacing != 0) && CharUtilities.isAdjustableSpace(orgChar)) {
- glyphAdjust += wordSpacing;
- }
- }
- ch = selectAndMapSingleByteFont(singleByteFont, fontName, fontSize,
- textutil, ch);
- }
- textutil.writeTJMappedChar(ch);
-
- if (dx != null && i < dxl - 1) {
- glyphAdjust += dx[i + 1];
- }
-
- if (glyphAdjust != 0) {
- textutil.adjustGlyphTJ(-glyphAdjust / fontSize);
- }
-
- }
- textutil.writeTJ();
- }
-
- private char selectAndMapSingleByteFont(SingleByteFont singleByteFont, String fontName,
- float fontSize, PDFTextUtil textutil, char ch) {
- if (singleByteFont != null && singleByteFont.hasAdditionalEncodings()) {
- int encoding = ch / 256;
- if (encoding == 0) {
- textutil.updateTf(fontName, fontSize, singleByteFont.isMultiByte());
- } else {
- textutil.updateTf(fontName + "_" + Integer.toString(encoding),
- fontSize, singleByteFont.isMultiByte());
- ch = (char)(ch % 256);
- }
- }
- return ch;
- }
-
- }
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