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- /*
- * Copyright 1999-2004 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.svg;
-
- 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.awt.font.TextAttribute;
- import java.awt.Shape;
- import java.awt.Paint;
- import java.awt.Stroke;
- import java.awt.Color;
- import java.util.List;
- import java.util.Iterator;
-
- 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.bridge.SVGFontFamily;
- import org.apache.batik.gvt.renderer.StrokingTextPainter;
-
- import org.apache.fop.fonts.FontMetrics;
- import org.apache.fop.fonts.Font;
- import org.apache.fop.fonts.FontInfo;
-
- /**
- * Renders the attributed character iterator of a <tt>TextNode</tt>.
- * This class draws the text directly into the PDFGraphics2D so that
- * the text is not drawn using shapes which makes the PDF 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: PDFTextPainter.java,v 1.16 2003/03/07 09:51:25 jeremias Exp $
- */
- public class PDFTextPainter implements TextPainter {
- 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 PDF text painter with the given font information.
- * @param fi the fint info
- */
- public PDFTextPainter(FontInfo fi) {
- fontInfo = fi;
- }
-
- /**
- * 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();
-
- AttributedCharacterIterator aci =
- node.getAttributedCharacterIterator();
- // reset position to start of char iterator
- if (aci.getBeginIndex() == aci.getEndIndex()) {
- return;
- }
- char ch = aci.first();
- if (ch == AttributedCharacterIterator.DONE) {
- return;
- }
- TextNode.Anchor anchor;
- anchor = (TextNode.Anchor) aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.ANCHOR_TYPE);
-
- List gvtFonts;
- gvtFonts = (List) aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.GVT_FONT_FAMILIES);
-
- TextPaintInfo tpi = (TextPaintInfo) aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.PAINT_INFO);
-
- if (tpi == null) {
- return;
- }
-
- Paint forg = tpi.fillPaint;
- Paint strokePaint = tpi.strokePaint;
- Float size = (Float) aci.getAttribute(TextAttribute.SIZE);
- if (size == null) {
- return;
- }
- Stroke stroke = tpi.strokeStroke;
- /*
- Float xpos = (Float) aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.X);
- Float ypos = (Float) aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.Y);
- */
-
- Float posture = (Float) aci.getAttribute(TextAttribute.POSTURE);
- Float taWeight = (Float) aci.getAttribute(TextAttribute.WEIGHT);
-
- boolean useStrokePainter = false;
-
- if (forg instanceof Color) {
- Color col = (Color) forg;
- if (col.getAlpha() != 255) {
- useStrokePainter = true;
- }
- g2d.setColor(col);
- }
- g2d.setPaint(forg);
- g2d.setStroke(stroke);
-
- if (strokePaint != null) {
- // need to draw using AttributedCharacterIterator
- useStrokePainter = true;
- }
-
- if (hasUnsupportedAttributes(aci)) {
- useStrokePainter = true;
- }
-
- // text contains unsupported information
- if (useStrokePainter) {
- PROXY_PAINTER.paint(node, g2d);
- return;
- }
-
- String style = ((posture != null) && (posture.floatValue() > 0.0))
- ? "italic" : "normal";
- int weight = ((taWeight != null)
- && (taWeight.floatValue() > 1.0)) ? Font.BOLD
- : Font.NORMAL;
-
- Font fontState = null;
- FontInfo fi = fontInfo;
- boolean found = false;
- String fontFamily = null;
- if (gvtFonts != null) {
- Iterator i = gvtFonts.iterator();
- while (i.hasNext()) {
- GVTFontFamily fam = (GVTFontFamily) i.next();
- if (fam instanceof SVGFontFamily) {
- PROXY_PAINTER.paint(node, g2d);
- return;
- }
- fontFamily = fam.getFamilyName();
- if (fi.hasFont(fontFamily, style, weight)) {
- String fname = fontInfo.fontLookup(fontFamily, style,
- weight);
- FontMetrics metrics = fontInfo.getMetricsFor(fname);
- int fsize = (int)(size.floatValue() * 1000);
- fontState = new Font(fname, metrics, fsize);
- found = true;
- break;
- }
- }
- }
- if (!found) {
- String fname =
- fontInfo.fontLookup("any", style, Font.NORMAL);
- FontMetrics metrics = fontInfo.getMetricsFor(fname);
- int fsize = (int)(size.floatValue() * 1000);
- fontState = new Font(fname, metrics, fsize);
- } else {
- if (g2d instanceof PDFGraphics2D) {
- ((PDFGraphics2D) g2d).setOverrideFontState(fontState);
- }
- }
- int fStyle = java.awt.Font.PLAIN;
- if (weight == Font.BOLD) {
- if (style.equals("italic")) {
- fStyle = java.awt.Font.BOLD | java.awt.Font.ITALIC;
- } else {
- fStyle = java.awt.Font.BOLD;
- }
- } else {
- if (style.equals("italic")) {
- fStyle = java.awt.Font.ITALIC;
- } else {
- fStyle = java.awt.Font.PLAIN;
- }
- }
- java.awt.Font font = new java.awt.Font(fontFamily, fStyle,
- (int)(fontState.getFontSize() / 1000));
-
- g2d.setFont(font);
-
- float advance = getStringWidth(txt, fontState);
- 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;
- }
- }
- g2d.drawString(txt, (float)(loc.getX() + tx), (float)(loc.getY()));
- }
-
- private boolean hasUnsupportedAttributes(AttributedCharacterIterator aci) {
- boolean hasunsupported = false;
- Object letSpace = aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.LETTER_SPACING);
- if (letSpace != null) {
- hasunsupported = true;
- }
-
- Object wordSpace = aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.WORD_SPACING);
- if (wordSpace != null) {
- hasunsupported = true;
- }
-
- AttributedCharacterIterator.Attribute key;
- key = GVTAttributedCharacterIterator.TextAttribute.WRITING_MODE;
- Object writeMod = aci.getAttribute(key);
- if (!GVTAttributedCharacterIterator.TextAttribute.WRITING_MODE_LTR.equals(
- writeMod)) {
- hasunsupported = true;
- }
-
- Object vertOr = aci.getAttribute(
- GVTAttributedCharacterIterator.TextAttribute.VERTICAL_ORIENTATION);
- if (GVTAttributedCharacterIterator.TextAttribute.ORIENTATION_ANGLE.equals(
- vertOr)) {
- hasunsupported = true;
- }
- return hasunsupported;
- }
-
- private float getStringWidth(String str, Font fontState) {
- float wordWidth = 0;
- float whitespaceWidth = fontState.getWidth(fontState.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 = fontState.getWidth(fontState.mapChar(c));
- if (charWidth <= 0) {
- charWidth = whitespaceWidth;
- }
- } else {
- charWidth = whitespaceWidth;
- }
- wordWidth += charWidth;
- }
- return wordWidth / 1000f;
- }
-
- /**
- * 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) {
- 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 PDF
-
- /**
- * 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;
- }
-
- }
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