123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576 |
- /*
- * Copyright 1999-2004,2006 The Apache Software Foundation.
- *
- * Licensed 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.ps;
-
- import java.awt.Graphics2D;
- import java.awt.geom.Point2D;
- import java.awt.geom.Rectangle2D;
- /* java.awt.Font is not imported to avoid confusion with
- org.apache.fop.fonts.Font */
-
- import java.text.AttributedCharacterIterator;
- import java.text.CharacterIterator;
- import java.awt.font.TextAttribute;
- import java.awt.Shape;
- import java.awt.Paint;
- import java.awt.Stroke;
- import java.awt.Color;
- import java.io.IOException;
- import java.util.List;
- import java.util.Iterator;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.java2d.ps.PSGraphics2D;
-
- import org.apache.batik.dom.svg.SVGOMTextElement;
- import org.apache.batik.gvt.text.Mark;
- import org.apache.batik.gvt.TextPainter;
- import org.apache.batik.gvt.TextNode;
- import org.apache.batik.gvt.text.GVTAttributedCharacterIterator;
- import org.apache.batik.gvt.text.TextPaintInfo;
- import org.apache.batik.gvt.font.GVTFontFamily;
- import org.apache.batik.gvt.renderer.StrokingTextPainter;
-
- import org.apache.fop.fonts.Font;
- import org.apache.fop.fonts.FontInfo;
- import org.apache.fop.fonts.FontTriplet;
-
- /**
- * Renders the attributed character iterator of a <tt>TextNode</tt>.
- * This class draws the text directly into the PSGraphics2D so that
- * the text is not drawn using shapes which makes the PS files larger.
- * If the text is simple enough to draw then it sets the font and calls
- * drawString. If the text is complex or the cannot be translated
- * into a simple drawString the StrokingTextPainter is used instead.
- *
- * (todo) handle underline, overline and strikethrough
- * (todo) use drawString(AttributedCharacterIterator iterator...) for some
- *
- * @author <a href="mailto:keiron@aftexsw.com">Keiron Liddle</a>
- * @version $Id$
- */
- public class PSTextPainter implements TextPainter {
-
- /** the logger for this class */
- protected Log log = LogFactory.getLog(PSTextPainter.class);
-
- private NativeTextHandler nativeTextHandler;
- //private FontInfo fontInfo;
-
- /**
- * Use the stroking text painter to get the bounds and shape.
- * Also used as a fallback to draw the string with strokes.
- */
- protected static final TextPainter
- PROXY_PAINTER = StrokingTextPainter.getInstance();
-
- /**
- * Create a new PS text painter with the given font information.
- * @param nativeTextHandler the NativeTextHandler instance used for text painting
- */
- public PSTextPainter(NativeTextHandler nativeTextHandler) {
- this.nativeTextHandler = nativeTextHandler;
- }
-
- /**
- * Paints the specified attributed character iterator using the
- * specified Graphics2D and context and font context.
- * @param node the TextNode to paint
- * @param g2d the Graphics2D to use
- */
- public void paint(TextNode node, Graphics2D g2d) {
- String txt = node.getText();
- Point2D loc = node.getLocation();
-
- if (hasUnsupportedAttributes(node)) {
- PROXY_PAINTER.paint(node, g2d);
- } else {
- paintTextRuns(node.getTextRuns(), g2d, loc);
- }
- }
-
-
- private boolean hasUnsupportedAttributes(TextNode node) {
- Iterator i = node.getTextRuns().iterator();
- while (i.hasNext()) {
- StrokingTextPainter.TextRun
- run = (StrokingTextPainter.TextRun)i.next();
- AttributedCharacterIterator aci = run.getACI();
- boolean hasUnsupported = hasUnsupportedAttributes(aci);
- if (hasUnsupported) {
- return true;
- }
- }
- return false;
- }
-
- private boolean hasUnsupportedAttributes(AttributedCharacterIterator aci) {
- boolean hasunsupported = false;
-
- String text = getText(aci);
- Font font = makeFont(aci);
- if (hasUnsupportedGlyphs(text, font)) {
- log.trace("-> Unsupported glyphs found");
- hasunsupported = true;
- }
-
- TextPaintInfo tpi = (TextPaintInfo) aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.PAINT_INFO);
- if ((tpi != null)
- && ((tpi.strokeStroke != null && tpi.strokePaint != null)
- || (tpi.strikethroughStroke != null)
- || (tpi.underlineStroke != null)
- || (tpi.overlineStroke != null))) {
- log.trace("-> under/overlines etc. found");
- hasunsupported = true;
- }
-
- //Alpha is not supported
- Paint foreground = (Paint) aci.getAttribute(TextAttribute.FOREGROUND);
- if (foreground instanceof Color) {
- Color col = (Color)foreground;
- if (col.getAlpha() != 255) {
- log.trace("-> transparency found");
- hasunsupported = true;
- }
- }
-
- Object letSpace = aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.LETTER_SPACING);
- if (letSpace != null) {
- log.trace("-> letter spacing found");
- hasunsupported = true;
- }
-
- Object wordSpace = aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.WORD_SPACING);
- if (wordSpace != null) {
- log.trace("-> word spacing found");
- hasunsupported = true;
- }
-
- Object lengthAdjust = aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.LENGTH_ADJUST);
- if (lengthAdjust != null) {
- log.trace("-> length adjustments found");
- hasunsupported = true;
- }
-
- Object writeMod = aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.WRITING_MODE);
- if (writeMod != null
- && !GVTAttributedCharacterIterator.TextAttribute.WRITING_MODE_LTR.equals(
- writeMod)) {
- log.trace("-> Unsupported writing modes found");
- hasunsupported = true;
- }
-
- Object vertOr = aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.VERTICAL_ORIENTATION);
- if (GVTAttributedCharacterIterator.TextAttribute.ORIENTATION_ANGLE.equals(
- vertOr)) {
- log.trace("-> vertical orientation found");
- hasunsupported = true;
- }
-
- Object rcDel = aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.TEXT_COMPOUND_DELIMITER);
- //Batik 1.6 returns null here which makes it impossible to determine whether this can
- //be painted or not, i.e. fall back to stroking. :-(
- if (/*rcDel != null &&*/ !(rcDel instanceof SVGOMTextElement)) {
- log.trace("-> spans found");
- hasunsupported = true; //Filter spans
- }
-
- if (hasunsupported) {
- log.trace("Unsupported attributes found in ACI, using StrokingTextPainter");
- }
- return hasunsupported;
- }
-
- /**
- * Paint a list of text runs on the Graphics2D at a given location.
- * @param textRuns the list of text runs
- * @param g2d the Graphics2D to paint to
- * @param loc the current location of the "cursor"
- */
- protected void paintTextRuns(List textRuns, Graphics2D g2d, Point2D loc) {
- Point2D currentloc = loc;
- Iterator i = textRuns.iterator();
- while (i.hasNext()) {
- StrokingTextPainter.TextRun
- run = (StrokingTextPainter.TextRun)i.next();
- currentloc = paintTextRun(run, g2d, currentloc);
- }
- }
-
- /**
- * Paint a single text run on the Graphics2D at a given location.
- * @param run the text run to paint
- * @param g2d the Graphics2D to paint to
- * @param loc the current location of the "cursor"
- * @return the new location of the "cursor" after painting the text run
- */
- protected Point2D paintTextRun(StrokingTextPainter.TextRun run, Graphics2D g2d, Point2D loc) {
- AttributedCharacterIterator aci = run.getACI();
- return paintACI(aci, g2d, loc);
- }
-
- /**
- * Extract the raw text from an ACI.
- * @param aci ACI to inspect
- * @return the extracted text
- */
- protected String getText(AttributedCharacterIterator aci) {
- StringBuffer sb = new StringBuffer(aci.getEndIndex() - aci.getBeginIndex());
- for (char c = aci.first(); c != CharacterIterator.DONE; c = aci.next()) {
- sb.append(c);
- }
- return sb.toString();
- }
-
- /**
- * Paint an ACI on a Graphics2D at a given location. The method has to
- * update the location after painting.
- * @param aci ACI to paint
- * @param g2d Graphics2D to paint on
- * @param loc start location
- * @return new current location
- */
- protected Point2D paintACI(AttributedCharacterIterator aci, Graphics2D g2d, Point2D loc) {
- //ACIUtils.dumpAttrs(aci);
-
- aci.first();
-
- updateLocationFromACI(aci, loc);
-
- TextPaintInfo tpi = (TextPaintInfo) aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.PAINT_INFO);
-
- if (tpi == null) {
- return loc;
- }
-
- TextNode.Anchor anchor = (TextNode.Anchor)aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.ANCHOR_TYPE);
-
- //Set up font
- List gvtFonts = (List)aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.GVT_FONT_FAMILIES);
- Paint foreground = tpi.fillPaint;
- Paint strokePaint = tpi.strokePaint;
- Stroke stroke = tpi.strokeStroke;
-
- Float fontSize = (Float)aci.getAttribute(TextAttribute.SIZE);
- if (fontSize == null) {
- return loc;
- }
- Float posture = (Float)aci.getAttribute(TextAttribute.POSTURE);
- Float taWeight = (Float)aci.getAttribute(TextAttribute.WEIGHT);
-
- if (foreground instanceof Color) {
- Color col = (Color)foreground;
- g2d.setColor(col);
- }
- g2d.setPaint(foreground);
- g2d.setStroke(stroke);
-
- Font font = makeFont(aci);
- java.awt.Font awtFont = makeAWTFont(aci, font);
-
- g2d.setFont(awtFont);
-
- String txt = getText(aci);
- float advance = getStringWidth(txt, font);
- float tx = 0;
- if (anchor != null) {
- switch (anchor.getType()) {
- case TextNode.Anchor.ANCHOR_MIDDLE:
- tx = -advance / 2;
- break;
- case TextNode.Anchor.ANCHOR_END:
- tx = -advance;
- break;
- default: //nop
- }
- }
-
- //Finally draw text
- nativeTextHandler.setOverrideFont(font);
- try {
- try {
- nativeTextHandler.drawString(txt, (float)(loc.getX() + tx), (float)(loc.getY()));
- } catch (IOException ioe) {
- if (g2d instanceof PSGraphics2D) {
- ((PSGraphics2D)g2d).handleIOException(ioe);
- }
- }
- } finally {
- nativeTextHandler.setOverrideFont(null);
- }
- loc.setLocation(loc.getX() + (double)advance, loc.getY());
- return loc;
- }
-
- private void updateLocationFromACI(
- AttributedCharacterIterator aci,
- Point2D loc) {
- //Adjust position of span
- Float xpos = (Float)aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.X);
- Float ypos = (Float)aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.Y);
- Float dxpos = (Float)aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.DX);
- Float dypos = (Float)aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.DY);
- if (xpos != null) {
- loc.setLocation(xpos.doubleValue(), loc.getY());
- }
- if (ypos != null) {
- loc.setLocation(loc.getX(), ypos.doubleValue());
- }
- if (dxpos != null) {
- loc.setLocation(loc.getX() + dxpos.doubleValue(), loc.getY());
- }
- if (dypos != null) {
- loc.setLocation(loc.getX(), loc.getY() + dypos.doubleValue());
- }
- }
-
- private String getStyle(AttributedCharacterIterator aci) {
- Float posture = (Float)aci.getAttribute(TextAttribute.POSTURE);
- return ((posture != null) && (posture.floatValue() > 0.0))
- ? "italic"
- : "normal";
- }
-
- private int getWeight(AttributedCharacterIterator aci) {
- Float taWeight = (Float)aci.getAttribute(TextAttribute.WEIGHT);
- return ((taWeight != null) && (taWeight.floatValue() > 1.0))
- ? Font.BOLD
- : Font.NORMAL;
- }
-
- private Font makeFont(AttributedCharacterIterator aci) {
- Float fontSize = (Float)aci.getAttribute(TextAttribute.SIZE);
- if (fontSize == null) {
- fontSize = new Float(10.0f);
- }
- String style = getStyle(aci);
- int weight = getWeight(aci);
-
- boolean found = false;
- FontInfo fontInfo = nativeTextHandler.getFontInfo();
- String fontFamily = null;
- List gvtFonts = (List) aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.GVT_FONT_FAMILIES);
- if (gvtFonts != null) {
- Iterator i = gvtFonts.iterator();
- while (i.hasNext()) {
- GVTFontFamily fam = (GVTFontFamily) i.next();
- /* (todo) Enable SVG Font painting
- if (fam instanceof SVGFontFamily) {
- PROXY_PAINTER.paint(node, g2d);
- return;
- }*/
- fontFamily = fam.getFamilyName();
- if (fontInfo.hasFont(fontFamily, style, weight)) {
- FontTriplet triplet = fontInfo.fontLookup(
- fontFamily, style, weight);
- int fsize = (int)(fontSize.floatValue() * 1000);
- return fontInfo.getFontInstance(triplet, fsize);
- }
- }
- }
- FontTriplet triplet = fontInfo.fontLookup("any", style, Font.NORMAL);
- int fsize = (int)(fontSize.floatValue() * 1000);
- return fontInfo.getFontInstance(triplet, fsize);
- }
-
- private java.awt.Font makeAWTFont(AttributedCharacterIterator aci, Font font) {
- final String style = getStyle(aci);
- final int weight = getWeight(aci);
- int fStyle = java.awt.Font.PLAIN;
- if (weight == Font.BOLD) {
- fStyle |= java.awt.Font.BOLD;
- }
- if ("italic".equals(style)) {
- fStyle |= java.awt.Font.ITALIC;
- }
- return new java.awt.Font(font.getFontName(), fStyle,
- (int)(font.getFontSize() / 1000));
- }
-
- private float getStringWidth(String str, Font font) {
- float wordWidth = 0;
- float whitespaceWidth = font.getWidth(font.mapChar(' '));
-
- for (int i = 0; i < str.length(); i++) {
- float charWidth;
- char c = str.charAt(i);
- if (!((c == ' ') || (c == '\n') || (c == '\r') || (c == '\t'))) {
- charWidth = font.getWidth(font.mapChar(c));
- if (charWidth <= 0) {
- charWidth = whitespaceWidth;
- }
- } else {
- charWidth = whitespaceWidth;
- }
- wordWidth += charWidth;
- }
- return wordWidth / 1000f;
- }
-
- private boolean hasUnsupportedGlyphs(String str, Font font) {
- for (int i = 0; i < str.length(); i++) {
- float charWidth;
- char c = str.charAt(i);
- if (!((c == ' ') || (c == '\n') || (c == '\r') || (c == '\t'))) {
- if (!font.hasChar(c)) {
- return true;
- }
- }
- }
- return false;
- }
-
- /**
- * Get the outline shape of the text characters.
- * This uses the StrokingTextPainter to get the outline
- * shape since in theory it should be the same.
- *
- * @param node the text node
- * @return the outline shape of the text characters
- */
- public Shape getOutline(TextNode node) {
- return PROXY_PAINTER.getOutline(node);
- }
-
- /**
- * Get the bounds.
- * This uses the StrokingTextPainter to get the bounds
- * since in theory it should be the same.
- *
- * @param node the text node
- * @return the bounds of the text
- */
- public Rectangle2D getBounds2D(TextNode node) {
- /* (todo) getBounds2D() is too slow
- * because it uses the StrokingTextPainter. We should implement this
- * method ourselves. */
- return PROXY_PAINTER.getBounds2D(node);
- }
-
- /**
- * Get the geometry bounds.
- * This uses the StrokingTextPainter to get the bounds
- * since in theory it should be the same.
- * @param node the text node
- * @return the bounds of the text
- */
- public Rectangle2D getGeometryBounds(TextNode node) {
- return PROXY_PAINTER.getGeometryBounds(node);
- }
-
- // Methods that have no purpose for PS
-
- /**
- * Get the mark.
- * This does nothing since the output is pdf and not interactive.
- * @param node the text node
- * @param pos the position
- * @param all select all
- * @return null
- */
- public Mark getMark(TextNode node, int pos, boolean all) {
- return null;
- }
-
- /**
- * Select at.
- * This does nothing since the output is pdf and not interactive.
- * @param x the x position
- * @param y the y position
- * @param node the text node
- * @return null
- */
- public Mark selectAt(double x, double y, TextNode node) {
- return null;
- }
-
- /**
- * Select to.
- * This does nothing since the output is pdf and not interactive.
- * @param x the x position
- * @param y the y position
- * @param beginMark the start mark
- * @return null
- */
- public Mark selectTo(double x, double y, Mark beginMark) {
- return null;
- }
-
- /**
- * Selec first.
- * This does nothing since the output is pdf and not interactive.
- * @param node the text node
- * @return null
- */
- public Mark selectFirst(TextNode node) {
- return null;
- }
-
- /**
- * Select last.
- * This does nothing since the output is pdf and not interactive.
- * @param node the text node
- * @return null
- */
- public Mark selectLast(TextNode node) {
- return null;
- }
-
- /**
- * Get selected.
- * This does nothing since the output is pdf and not interactive.
- * @param start the start mark
- * @param finish the finish mark
- * @return null
- */
- public int[] getSelected(Mark start, Mark finish) {
- return null;
- }
-
- /**
- * Get the highlighted shape.
- * This does nothing since the output is pdf and not interactive.
- * @param beginMark the start mark
- * @param endMark the end mark
- * @return null
- */
- public Shape getHighlightShape(Mark beginMark, Mark endMark) {
- return null;
- }
-
- }
-
|