From: Jeremias Maerki Date: Tue, 23 Sep 2008 12:14:22 +0000 (+0000) Subject: Added missing support for Next Line (NEL, 0x0085) and Line Separator (LS, 0x2028... X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=3ad16136d5ced0b209e391bee623bb9b7a97398c;p=xmlgraphics-fop.git Added missing support for Next Line (NEL, 0x0085) and Line Separator (LS, 0x2028) characters. git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/fop-0_95@698151 13f79535-47bb-0310-9956-ffa450edef68 --- diff --git a/src/java/org/apache/fop/layoutmgr/inline/TextLayoutManager.java b/src/java/org/apache/fop/layoutmgr/inline/TextLayoutManager.java index 40e1c087a..e451a659a 100644 --- a/src/java/org/apache/fop/layoutmgr/inline/TextLayoutManager.java +++ b/src/java/org/apache/fop/layoutmgr/inline/TextLayoutManager.java @@ -5,9 +5,9 @@ * 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. @@ -26,6 +26,7 @@ import java.util.ListIterator; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; + import org.apache.fop.area.Trait; import org.apache.fop.area.inline.TextArea; import org.apache.fop.fo.Constants; @@ -81,7 +82,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { this.isSpace = isSpace; this.breakOppAfter = breakOppAfter; } - + public String toString() { return "[ lscnt=" + iLScount + ", wscnt=" + iWScount @@ -120,7 +121,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { /** Used to reduce instantiation of MinOptMax with zero length. Do not modify! */ private static final MinOptMax ZERO_MINOPTMAX = new MinOptMax(0); - + private FOText foText; private char[] textArray; /** @@ -130,8 +131,6 @@ public class TextLayoutManager extends LeafNodeLayoutManager { */ private MinOptMax[] letterAdjustArray; //size = textArray.length + 1 - private static final char NEWLINE = '\n'; - private Font font = null; /** Start index of first character in this parent Area */ private short iAreaStart = 0; @@ -152,7 +151,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { /** 1/2 of word-spacing value */ private SpaceVal halfWS; /** 1/2 of letter-spacing value */ - private SpaceVal halfLS; + private SpaceVal halfLS; /** Number of space characters after previous possible break position. */ private int iNbSpacesPending; @@ -166,7 +165,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { private int lineStartBAP = 0; private int lineEndBAP = 0; - + private boolean keepTogether; /** @@ -177,7 +176,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { public TextLayoutManager(FOText node) { super(); foText = node; - + textArray = new char[node.endIndex - node.startIndex]; System.arraycopy(node.ca, node.startIndex, textArray, 0, node.endIndex - node.startIndex); @@ -185,22 +184,22 @@ public class TextLayoutManager extends LeafNodeLayoutManager { vecAreaInfo = new java.util.ArrayList(); } - + /** {@inheritDoc} */ public void initialize() { FontInfo fi = foText.getFOEventHandler().getFontInfo(); FontTriplet[] fontkeys = foText.getCommonFont().getFontState(fi); font = fi.getFontInstance(fontkeys[0], foText.getCommonFont().fontSize.getValue(this)); - + // With CID fonts, space isn't neccesary currentFontState.width(32) spaceCharIPD = font.getCharWidth(' '); // Use hyphenationChar property hyphIPD = foText.getCommonHyphenation().getHyphIPD(font); - + SpaceVal ls = SpaceVal.makeLetterSpacing(foText.getLetterSpacing()); halfLS = new SpaceVal(MinOptMax.multiply(ls.getSpace(), 0.5), ls.isConditional(), ls.isForcing(), ls.getPrecedence()); - + ws = SpaceVal.makeWordSpacing(foText.getWordSpacing(), ls, font); // Make half-space: on either side of a word-space) halfWS = new SpaceVal(MinOptMax.multiply(ws.getSpace(), 0.5), @@ -219,7 +218,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { // in the SpaceVal.makeWordSpacing() method letterSpaceIPD = ls.getSpace(); wordSpaceIPD = MinOptMax.add(new MinOptMax(spaceCharIPD), ws.getSpace()); - + keepTogether = foText.getKeepTogether().getWithinLine().getEnum() == Constants.EN_ALWAYS; } @@ -298,9 +297,9 @@ public class TextLayoutManager extends LeafNodeLayoutManager { realWidth.add(MinOptMax.multiply(letterSpaceIPD, -1)); iLScount--; } - + for (int i = ai.iStartIndex; i < ai.iBreakIndex; i++) { - MinOptMax ladj = letterAdjustArray[i + 1]; + MinOptMax ladj = letterAdjustArray[i + 1]; if (ladj != null && ladj.isElastic()) { iLScount++; } @@ -327,7 +326,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { iDifference = (int) ((double) (realWidth.opt - realWidth.min) * dIPDAdjust); } - + // set letter space adjustment if (dIPDAdjust > 0.0) { iLetterSpaceDim @@ -341,7 +340,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { iTotalAdjust += (iLetterSpaceDim - letterSpaceIPD.opt) * iLScount; // set word space adjustment - // + // if (iWScount > 0) { iWordSpaceDim += (int) ((iDifference - iTotalAdjust) / iWScount); } else { @@ -370,7 +369,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { // the last character of a word and to space characters: in order // to avoid this, we must subtract the letter space width twice; // the renderer will compute the space width as: - // space width = + // space width = // = "normal" space width + letterSpaceAdjust + wordSpaceAdjust // = spaceCharIPD + letterSpaceAdjust + // + (iWordSpaceDim - spaceCharIPD - 2 * letterSpaceAdjust) @@ -395,7 +394,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { * @param context the layout context * @param spaceDiff unused * @param firstIndex the index of the first AreaInfo used for the TextArea - * @param lastIndex the index of the last AreaInfo used for the TextArea + * @param lastIndex the index of the last AreaInfo used for the TextArea * @param isLastArea is this TextArea the last in a line? * @return the new text area */ @@ -450,7 +449,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { // here ends a new word // add a word to the TextArea if (isLastArea - && i == lastIndex + && i == lastIndex && areaInfo.bHyphenated) { len++; } @@ -475,7 +474,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { } // String wordChars = new String(textArray, wordStartIndex, len); if (isLastArea - && i == lastIndex + && i == lastIndex && areaInfo.bHyphenated) { // add the hyphenation character wordChars.append(foText.getCommonHyphenation().getHyphChar(font)); @@ -487,12 +486,12 @@ public class TextLayoutManager extends LeafNodeLayoutManager { } TraitSetter.addFontTraits(textArea, font); textArea.addTrait(Trait.COLOR, foText.getColor()); - + TraitSetter.addTextDecoration(textArea, foText.getTextDecoration()); - + return textArea; } - + private void addToLetterAdjust(int index, int width) { if (letterAdjustArray[index] == null) { letterAdjustArray[index] = new MinOptMax(width); @@ -519,7 +518,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { || CharUtilities.isNonBreakableSpace(ch) || CharUtilities.isFixedWidthSpace(ch); } - + /** {@inheritDoc} */ public LinkedList getNextKnuthElements(LayoutContext context, int alignment) { lineStartBAP = context.getLineStartBorderAndPaddingWidth(); @@ -536,11 +535,11 @@ public class TextLayoutManager extends LeafNodeLayoutManager { iThisStart = iNextStart; boolean inWord = false; boolean inWhitespace = false; - char ch = 0; + char ch = 0; while (iNextStart < textArray.length) { - ch = textArray[iNextStart]; + ch = textArray[iNextStart]; boolean breakOpportunity = false; - byte breakAction = keepTogether? LineBreakStatus.PROHIBITED_BREAK : lbs.nextChar(ch); + byte breakAction = keepTogether ? LineBreakStatus.PROHIBITED_BREAK : lbs.nextChar(ch); switch (breakAction) { case LineBreakStatus.COMBINING_PROHIBITED_BREAK: case LineBreakStatus.PROHIBITED_BREAK: @@ -556,7 +555,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { log.error("Unexpected breakAction: " + breakAction); } if (inWord) { - if (breakOpportunity || isSpace(ch) || ch == NEWLINE) { + if (breakOpportunity || isSpace(ch) || CharUtilities.isLineBreakCharacter(ch)) { //Word boundary found, process widths and kerning int lastIndex = iNextStart; while (lastIndex > 0 && textArray[lastIndex - 1] == CharUtilities.SOFT_HYPHEN) { @@ -626,7 +625,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { ai = new AreaInfo(iThisStart, (short) (iNextStart), (short) (iNextStart - iThisStart), (short) 0, MinOptMax.multiply(wordSpaceIPD, iNextStart - iThisStart), - false, true, breakOpportunity); + false, true, breakOpportunity); vecAreaInfo.add(ai); prevAi = ai; @@ -657,9 +656,9 @@ public class TextLayoutManager extends LeafNodeLayoutManager { returnList.add(sequence); } } - - if ((ch == CharUtilities.SPACE - && foText.getWhitespaceTreatment() == Constants.EN_PRESERVE) + + if ((ch == CharUtilities.SPACE + && foText.getWhitespaceTreatment() == Constants.EN_PRESERVE) || ch == CharUtilities.NBSPACE) { // preserved space or non-breaking space: // create the AreaInfo object @@ -672,17 +671,17 @@ public class TextLayoutManager extends LeafNodeLayoutManager { MinOptMax ipd = new MinOptMax(font.getCharWidth(ch)); ai = new AreaInfo(iNextStart, (short) (iNextStart + 1), (short) 0, (short) 0, - ipd, false, true, breakOpportunity); + ipd, false, true, breakOpportunity); iThisStart = (short) (iNextStart + 1); - } else if (ch == NEWLINE) { + } else if (CharUtilities.isLineBreakCharacter(ch)) { // linefeed; this can happen when linefeed-treatment="preserve" iThisStart = (short) (iNextStart + 1); } - inWord = !isSpace(ch) && ch != NEWLINE; + inWord = !isSpace(ch) && !CharUtilities.isLineBreakCharacter(ch); inWhitespace = ch == CharUtilities.SPACE && foText.getWhitespaceTreatment() != Constants.EN_PRESERVE; iNextStart++; } // end of while - + // Process any last elements if (inWord) { int lastIndex = iNextStart; @@ -734,7 +733,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { ai = new AreaInfo(iThisStart, (short) (iNextStart), (short) (iNextStart - iThisStart), (short) 0, MinOptMax.multiply(wordSpaceIPD, iNextStart - iThisStart), - false, true, true); + false, true, true); vecAreaInfo.add(ai); // create the elements @@ -747,7 +746,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { sequence.addAll (createElementsForASpace(alignment, ai, vecAreaInfo.size() - 1)); ai = null; - } else if (ch == NEWLINE) { + } else if (CharUtilities.isLineBreakCharacter(ch)) { if (lineEndBAP != 0) { sequence.add (new KnuthGlue(lineEndBAP, 0, 0, @@ -894,7 +893,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { : (iStopIndex - iStartIndex)))); if (!(bNothingChanged - && iStopIndex == ai.iBreakIndex + && iStopIndex == ai.iBreakIndex && bHyphenFollows == false)) { // the new AreaInfo object is not equal to the old one if (changeList == null) { @@ -991,7 +990,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { AreaInfo ai, int leafValue) { LinkedList spaceElements = new LinkedList(); LeafPosition mainPosition = new LeafPosition(this, leafValue); - + if (!ai.breakOppAfter) { // a non-breaking space if (alignment == EN_JUSTIFY) { @@ -1001,7 +1000,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { notifyPos(new LeafPosition(this, -1)), true)); spaceElements.add(new KnuthPenalty(0, KnuthElement.INFINITE, false, new LeafPosition(this, -1), false)); - spaceElements.add(new KnuthGlue(ai.ipdArea.opt, ai.ipdArea.max - ai.ipdArea.opt, + spaceElements.add(new KnuthGlue(ai.ipdArea.opt, ai.ipdArea.max - ai.ipdArea.opt, ai.ipdArea.opt - ai.ipdArea.min, mainPosition, false)); } else { // the space does not need to stretch or shrink, and must be @@ -1016,7 +1015,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { switch (alignment) { case EN_CENTER: // centered text: - // if the second element is chosen as a line break these elements + // if the second element is chosen as a line break these elements // add a constant amount of stretch at the end of a line and at the // beginning of the next one, otherwise they don't add any stretch spaceElements.add(new KnuthGlue(lineEndBAP, @@ -1043,7 +1042,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { case EN_START: // fall through case EN_END: // left- or right-aligned text: - // if the second element is chosen as a line break these elements + // if the second element is chosen as a line break these elements // add a constant amount of stretch at the end of a line, otherwise // they don't add any stretch spaceElements.add(new KnuthGlue(lineEndBAP, @@ -1102,13 +1101,13 @@ public class TextLayoutManager extends LeafNodeLayoutManager { this, -1), false)); spaceElements.add(new KnuthGlue(lineStartBAP + ai.ipdArea.opt, 0, 0, mainPosition, false)); - } + } } else { // a (possible block) of breaking spaces switch (alignment) { case EN_CENTER: // centered text: - // if the second element is chosen as a line break these elements + // if the second element is chosen as a line break these elements // add a constant amount of stretch at the end of a line and at the // beginning of the next one, otherwise they don't add any stretch spaceElements.add(new KnuthGlue(lineEndBAP, @@ -1134,7 +1133,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { case EN_START: // fall through case EN_END: // left- or right-aligned text: - // if the second element is chosen as a line break these elements + // if the second element is chosen as a line break these elements // add a constant amount of stretch at the end of a line, otherwise // they don't add any stretch if (lineStartBAP != 0 || lineEndBAP != 0) { @@ -1221,7 +1220,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { } } } - + return spaceElements; } @@ -1239,14 +1238,14 @@ public class TextLayoutManager extends LeafNodeLayoutManager { // constant letter spacing wordElements.add (new KnuthInlineBox( - bSuppressibleLetterSpace + bSuppressibleLetterSpace ? ai.ipdArea.opt - letterSpaceWidth.opt : ai.ipdArea.opt, alignmentContext, notifyPos(mainPosition), false)); } else { // adjustable letter spacing - int unsuppressibleLetterSpaces + int unsuppressibleLetterSpaces = bSuppressibleLetterSpace ? ai.iLScount - 1 : ai.iLScount; wordElements.add (new KnuthInlineBox(ai.ipdArea.opt @@ -1265,7 +1264,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { (new KnuthInlineBox(0, null, notifyPos(new LeafPosition(this, -1)), true)); } - + // extra-elements if the word fragment is the end of a syllable, // or it ends with a character that can be used as a line break if (ai.bHyphenated) { @@ -1275,7 +1274,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { widthIfNoBreakOccurs = letterAdjustArray[ai.iBreakIndex]; } //if (ai.iBreakIndex) - + // the word fragment ends at the end of a syllable: // if a break occurs the content width increases, // otherwise nothing happens @@ -1297,7 +1296,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { widthIfNoBreakOccurs = ZERO_MINOPTMAX; } LinkedList hyphenElements = new LinkedList(); - + switch (alignment) { case EN_CENTER : // centered text: @@ -1347,7 +1346,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { (new KnuthGlue(lineStartBAP, 3 * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0, new LeafPosition(this, -1), true)); break; - + case EN_START : // fall through case EN_END : // left- or right-aligned text: @@ -1405,7 +1404,7 @@ public class TextLayoutManager extends LeafNodeLayoutManager { new LeafPosition(this, -1), false)); } break; - + default: // justified text, or last line justified: // just a flagged penalty @@ -1467,10 +1466,10 @@ public class TextLayoutManager extends LeafNodeLayoutManager { } } } - + return hyphenElements; } - + } diff --git a/src/java/org/apache/fop/util/CharUtilities.java b/src/java/org/apache/fop/util/CharUtilities.java index 4910a371c..d1b1bd6e9 100644 --- a/src/java/org/apache/fop/util/CharUtilities.java +++ b/src/java/org/apache/fop/util/CharUtilities.java @@ -5,9 +5,9 @@ * 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. @@ -123,7 +123,7 @@ public class CharUtilities { * @return true if the character has a fixed-width */ public static boolean isFixedWidthSpace(char c) { - return (c >= '\u2000' && c <= '\u200B') + return (c >= '\u2000' && c <= '\u200B') || c == '\u3000'; // c == '\u2000' // en quad // c == '\u2001' // em quad @@ -167,7 +167,7 @@ public class CharUtilities { (c == '\u0020' // normal space || c == NBSPACE); // no-break space } - + /** * Determines if the character represents any kind of space. * @param c character to check @@ -177,7 +177,7 @@ public class CharUtilities { boolean ret = (isBreakableSpace(c) || isNonBreakableSpace(c)); return ret; } - + /** * Indicates whether a character is classified as "Alphabetic" by the Unicode standard. * @param ch the character @@ -201,6 +201,21 @@ public class CharUtilities { return false; } } - + + /** + * Indicates whether the given character is a line break character as in the + * "BK" line breaking class (see UAX #14). + * @param ch the character + * @return true if the character is in the "BK" line breaking class + */ + public static boolean isLineBreakCharacter(char ch) { + return ch == '\n' + || (ch == '\u0085') //NEXT LINE (NEL) + || (ch == '\u2028'); //LINE SEPARATOR (SP) + //maybe also: PARAGRAPH SEPARATOR (PS) + //FORM FEED (FF, 000C) and LINE TABULATION (VT, 000B) are in the "BK" class + //but are no valid XML characters and therefore left out here. + } + } diff --git a/status.xml b/status.xml index 0d7bba547..90b14aec7 100644 --- a/status.xml +++ b/status.xml @@ -53,6 +53,10 @@ + + Added missing support for Next Line (NEL, 0x0085) + and Line Separator (LS, 0x2028) characters. + Fixed text stroking in SVG when the stroke-width is zero. diff --git a/test/layoutengine/standard-testcases/block_uax14_linebreaking_bk.xml b/test/layoutengine/standard-testcases/block_uax14_linebreaking_bk.xml new file mode 100644 index 000000000..24e08a134 --- /dev/null +++ b/test/layoutengine/standard-testcases/block_uax14_linebreaking_bk.xml @@ -0,0 +1,74 @@ + + + + + +

+ This test checks some of the UAX#14 breaking rules + (this file: BK: Mandatory Break (A) (Non-tailorable)). +

+ + + + + + + + + + + + BK -- Mandatory Break (A) (Non-tailorable) + + + + VeryLongWordWithALineSeparator
PutInTheMiddleOfIt + + + + VeryLongWordWithANEL…PutInTheMiddleOfIt + + VeryLongWordWithACarriageReturn + PutInTheMiddleOfIt + + + + + + + + + + + + + + + + + + + + + + + + + +