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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.
*/
package org.apache.batik.bridge;
import java.awt.font.FontRenderContext;
import java.awt.font.TextAttribute;
import java.text.AttributedCharacterIterator;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.Arrays;
import org.apache.batik.gvt.flow.BlockInfo;
import org.apache.batik.gvt.flow.FlowRegions;
import org.apache.batik.gvt.flow.GlyphGroupInfo;
import org.apache.batik.gvt.flow.LineInfo;
import org.apache.batik.gvt.flow.RegionInfo;
import org.apache.batik.gvt.flow.TextLineBreaks;
import org.apache.batik.gvt.flow.WordInfo;
import org.apache.batik.gvt.font.GVTFont;
import org.apache.batik.gvt.font.GVTGlyphVector;
import org.apache.batik.gvt.font.GVTLineMetrics;
import org.apache.batik.gvt.font.MultiGlyphVector;
import org.apache.batik.gvt.text.GVTAttributedCharacterIterator;
/**
* One line Class Desc
*
* Complete Class Desc
*
* @author deweese
* @version $Id$
*/
public class FlowTextPainter extends StrokingTextPainter {
/**
* A unique instance of this class.
*/
protected static TextPainter singleton = new FlowTextPainter();
/**
* Returns a unique instance of this class.
*/
public static TextPainter getInstance() {
return singleton;
}
public List getTextRuns(TextNode node, AttributedCharacterIterator aci) {
List textRuns = node.getTextRuns();
if (textRuns != null) {
return textRuns;
}
AttributedCharacterIterator[] chunkACIs = getTextChunkACIs(aci);
textRuns = computeTextRuns(node, aci, chunkACIs);
aci.first();
List rgns = (List)aci.getAttribute(FLOW_REGIONS);
if (rgns != null) {
Iterator i = textRuns.iterator();
List chunkLayouts = new ArrayList();
TextRun tr = (TextRun)i.next();
List layouts = new ArrayList();
chunkLayouts.add(layouts);
layouts.add(tr.getLayout());
while (i.hasNext()) {
tr = (TextRun)i.next();
if (tr.isFirstRunInChunk()) {
layouts = new ArrayList();
chunkLayouts.add(layouts);
}
layouts.add(tr.getLayout());
}
textWrap(chunkACIs, chunkLayouts, rgns, fontRenderContext);
}
node.setTextRuns(textRuns);
return node.getTextRuns();
}
public static final char SOFT_HYPHEN = 0x00AD;
public static final char ZERO_WIDTH_SPACE = 0x200B;
public static final char ZERO_WIDTH_JOINER = 0x200D;
public static final char SPACE = ' ';
public static final AttributedCharacterIterator.Attribute WORD_LIMIT =
TextLineBreaks.WORD_LIMIT;
public static final AttributedCharacterIterator.Attribute FLOW_REGIONS =
GVTAttributedCharacterIterator.TextAttribute.FLOW_REGIONS;
public static final AttributedCharacterIterator.Attribute FLOW_LINE_BREAK
= GVTAttributedCharacterIterator.TextAttribute.FLOW_LINE_BREAK;
public static final AttributedCharacterIterator.Attribute LINE_HEIGHT
= GVTAttributedCharacterIterator.TextAttribute.LINE_HEIGHT;
public static final AttributedCharacterIterator.Attribute GVT_FONT
= GVTAttributedCharacterIterator.TextAttribute.GVT_FONT;
protected static Set szAtts = new HashSet();
static {
szAtts.add(TextAttribute.SIZE);
szAtts.add(GVT_FONT);
szAtts.add(LINE_HEIGHT);
}
public static boolean textWrap(AttributedCharacterIterator [] acis,
List chunkLayouts,
List flowRects,
FontRenderContext frc) {
// System.out.println("Len: " + acis.length + " Size: " +
// chunkLayouts.size());
// Make a list of the GlyphVectors so we can construct a
// multiGlyphVector that makes them all look like one big
// glyphVector
// GVTGlyphVector [] gvs = new GVTGlyphVector[acis.length]; // todo - not used?
WordInfo [][] wordInfos = new WordInfo[acis.length][];
Iterator clIter = chunkLayouts.iterator();
float prevBotMargin = 0;
int numWords = 0;
BlockInfo [] blockInfos = new BlockInfo[acis.length];
float [] topSkip = new float[acis.length];
for (int chunk=0; clIter.hasNext(); chunk++) {
// System.err.print("Chunk: " + chunk + " Str: '");
AttributedCharacterIterator aci = acis[chunk];
List gvl = new LinkedList();
List layouts = (List)clIter.next();
for (Object layout : layouts) {
GlyphLayout gl = (GlyphLayout) layout;
gvl.add(gl.getGlyphVector());
}
GVTGlyphVector gv = new MultiGlyphVector(gvl);
// gvs[chunk] = gv;
wordInfos[chunk] = doWordAnalysis(gv, aci, numWords, frc);
aci.first();
BlockInfo bi = (BlockInfo)aci.getAttribute(FLOW_PARAGRAPH);
bi.initLineInfo(frc);
blockInfos[chunk] = bi;
if (prevBotMargin > bi.getTopMargin())
topSkip[chunk] = prevBotMargin;
else
topSkip[chunk] = bi.getTopMargin();
prevBotMargin = bi.getBottomMargin();
numWords += wordInfos[chunk].length;
}
Iterator frIter = flowRects.iterator();
RegionInfo currentRegion = null;
int currWord = 0;
int chunk = 0;
List lineInfos = new LinkedList();
while(frIter.hasNext()) {
currentRegion = (RegionInfo) frIter.next();
FlowRegions fr = new FlowRegions(currentRegion.getShape());
while (chunk < wordInfos.length) {
WordInfo [] chunkInfo = wordInfos[chunk];
BlockInfo bi = blockInfos[chunk];
WordInfo wi = chunkInfo[currWord];
Object flowLine = wi.getFlowLine();
double lh = Math.max(wi.getLineHeight(),bi.getLineHeight());
LineInfo li = new LineInfo(fr, bi, true);
double newY = li.getCurrentY()+topSkip[chunk];
topSkip[chunk] = 0;
if (li.gotoY(newY)) break;
while (!li.addWord(wi)) {
// step down 1/10 of a line height and try again.
newY = li.getCurrentY() + (lh * 0.1);
if (li.gotoY(newY)) break;
}
if (fr.done()) break;
currWord++;
for (;currWord < chunkInfo.length;currWord++) {
wi = chunkInfo[currWord];
if ((wi.getFlowLine() == flowLine) && (li.addWord(wi)))
continue;
// Word didn't fit or we hit end of flowLine elem,
// go to a new line.
li.layout();
lineInfos.add(li);
li = null;
flowLine = wi.getFlowLine();
lh = Math.max(wi.getLineHeight(),bi.getLineHeight());
if (!fr.newLine(lh)) break; // region is done
li = new LineInfo(fr, bi, false);
while (!li.addWord(wi)) {
newY =li.getCurrentY() + (lh * 0.1);
if (li.gotoY(newY)) break;
}
if (fr.done()) break;
}
if (li != null) {
li.setParaEnd(true);
li.layout();
}
if (fr.done()) break;
chunk++;
currWord = 0;
if (bi.isFlowRegionBreak())
break;
if (!fr.newLine(lh)) // Region is done.
break;
}
if (chunk == wordInfos.length)
break;
}
boolean overflow = (chunk < wordInfos.length);
while (chunk < wordInfos.length) {
WordInfo [] chunkInfo = wordInfos[chunk];
while (currWord < chunkInfo.length) {
WordInfo wi = chunkInfo[currWord];
int numGG = wi.getNumGlyphGroups();
for (int gg=0; gg maxWord) {
maxWord = minWord;
wordMap = allocWordMap(wordMap, maxWord+1);
}
aciIdx++;
for (int c=1; c maxWord) {
maxWord = cWord;
wordMap = allocWordMap(wordMap, maxWord+1);
}
// We always want to use the min word as the main
// index for the new composite word.
if (cWord < minWord) {
wordMap[minWord] = cWord;
minWord = cWord;
} else if (cWord > minWord) {
wordMap[cWord] = minWord;
}
aciIdx++;
}
glyphWords[i] = minWord;
}
int words=0;
WordInfo [] cWordMap = new WordInfo[maxWord+1];
for (int i=0; i<=maxWord; i++) {
int nw = wordMap[i];
if (nw == -1) {
// new word so give it a number.
cWordMap[i] = new WordInfo(words++);
} else {
int word = nw;
nw = wordMap[i];
while (nw != -1) {
word = nw;
nw = wordMap[word];
}
wordMap[i] = word; // help the next guy out
cWordMap[i] = cWordMap[word];
}
}
wordMap = null;
WordInfo [] wordInfos = new WordInfo[words];
for (int i=0; i<=maxWord; i++) {
WordInfo wi = cWordMap[i];
wordInfos[wi.getIndex()] = cWordMap[i];
}
aciIdx = aci.getBeginIndex();
int aciEnd = aci.getEndIndex();
char ch = aci.setIndex(aciIdx);
int aciWordStart = aciIdx;
GVTFont gvtFont = (GVTFont)aci.getAttribute(GVT_FONT);
float lineHeight = 1.0f;
Float lineHeightFloat = (Float)aci.getAttribute(LINE_HEIGHT);
if (lineHeightFloat != null)
lineHeight = lineHeightFloat;
int runLimit = aci.getRunLimit(szAtts);
WordInfo prevWI = null;
float [] lastAdvAdj = new float [numGlyphs];
float [] advAdj = new float [numGlyphs];
boolean [] hideLast = new boolean[numGlyphs];
boolean [] hide = new boolean[numGlyphs];
boolean [] space = new boolean[numGlyphs];
float [] glyphPos = gv.getGlyphPositions(0, numGlyphs+1, null);
for (int i=0; i runLimit) && (aciIdx < aciEnd)) {
// Possible font size/style change so record current
// line metrics and start fresh.
GVTLineMetrics lm = gvtFont.getLineMetrics
(aci,aciWordStart, runLimit, frc);
prevWI.addLineMetrics(gvtFont, lm);
prevWI.addLineHeight(lineHeight);
prevWI = null;
aciWordStart = aciIdx;
aci.setIndex(aciIdx);
gvtFont = (GVTFont)aci.getAttribute(GVT_FONT);
Float f = (Float)aci.getAttribute(LINE_HEIGHT);
lineHeight = f;
runLimit = aci.getRunLimit(szAtts);
}
}
GVTLineMetrics lm = gvtFont.getLineMetrics
(aci,aciWordStart, runLimit, frc);
prevWI.addLineMetrics(gvtFont, lm);
prevWI.addLineHeight(lineHeight);
int [] wordGlyphCounts = new int[words];
// Build a mapping from words to glyphs.
for (int i=0; i © 2015 - 2024 Weber Informatics LLC | Privacy Policy