[
https://issues.apache.org/jira/browse/FOP-2880?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Joao Goncalves closed FOP-2880.
-------------------------------
Fix Version/s: main
Resolution: Fixed
[https://github.com/apache/xmlgraphics-fop/commit/794684aa3b61b29d89ceceeecf7fb3e7363eb890]
We can now add a soft hyphen as a hyphenation character, but only pdf can use
it.
> [PATCH] Hyphenated words are not searchable in readers (when accessibilty is
> turned on)
> ---------------------------------------------------------------------------------------
>
> Key: FOP-2880
> URL: https://issues.apache.org/jira/browse/FOP-2880
> Project: FOP
> Issue Type: Bug
> Components: unqualified
> Affects Versions: 2.3
> Reporter: Dan Caprioara
> Assignee: Joao Goncalves
> Priority: Major
> Fix For: main
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> The hyphenated words are rendered by FOP using the hard hyphen character.
> This contradicts the PDF specification, where in section:
> 14.8.2.2.3 Incidental Artifacts
> clearly states that the SHY soft hyphen U+00AD character should be used.
> The effect is that the hyphenated words are not searchable, and the
> copy/paste feature includes also the hard hyphens, instead of removing them
> and joining the words pieces together.
> Here is a small patch that can be applied on the FOP core project in order to
> fix this - this is more like a proof of concept, the real fix would be to
> change the default hyphenation character * in the FOProppertyMapping and to
> change the font mappings: to remove the replacement of the SHY with the
> HYPHEN, see the org.apache.fop.fonts.CodePointMapping.encStandardEncoding,
> and org.apache.fop.fonts.CodePointMapping.encISOLatin1Encoding
> {code}
> 0xad, 0x002D, // hyphen
> 0xad, 0x00AD, // hyphen
> {code}
> The patch:
> {code}
> Index: src/main/java/org/apache/fop/fo/properties/CommonHyphenation.java
> ===================================================================
> --- src/main/java/org/apache/fop/fo/properties/CommonHyphenation.java
> (revision 191037)
> +++ src/main/java/org/apache/fop/fo/properties/CommonHyphenation.java
> (working copy)
> @@ -15,7 +15,7 @@
> * limitations under the License.
> */
>
> -/* $Id$ */
> +/* $Id: CommonHyphenation.java 1610839 2014-07-15 20:25:58Z vhennebert $ */
>
> package org.apache.fop.fo.properties;
>
> @@ -184,6 +184,16 @@
> */
> public int getHyphIPD(org.apache.fop.fonts.Font font) {
> char hyphChar = getHyphChar(font);
> +
> + if (hyphChar == '\u00ad') {
> + // Bizarre fix, defining the SHY as default hyphenation character
> in the FOPropertyMapping, leads
> + // to hard hyphens not selectable in the PDF reader.
> + //
> + // Mapping also the hard hyphen makes the character selectable!
> + font.mapChar('\u002d');
> + }
> +
> +
> return font.getCharWidth(hyphChar);
> }
>
> Index: src/main/java/org/apache/fop/fo/FOPropertyMapping.java
> ===================================================================
> --- src/main/java/org/apache/fop/fo/FOPropertyMapping.java (revision
> 190759)
> +++ src/main/java/org/apache/fop/fo/FOPropertyMapping.java (working copy)
> @@ -1106,7 +1106,10 @@
> // hyphenation-character
> m = new CharacterProperty.Maker(PR_HYPHENATION_CHARACTER);
> m.setInherited(true);
> - m.setDefault("-");
> +//
> +// m.setDefault("-");
> + m.setDefault("\u00ad");
> +
> addPropertyMaker("hyphenation-character", m);
>
> // hyphenation-push-character-count
> Index: src/main/java/org/apache/fop/render/pdf/PDFPainter.java
> ===================================================================
> --- src/main/java/org/apache/fop/render/pdf/PDFPainter.java (revision
> 190759)
> +++ src/main/java/org/apache/fop/render/pdf/PDFPainter.java (working copy)
> @@ -420,7 +420,8 @@
> PDFStructElem structElem = (PDFStructElem)
> getContext().getStructureTreeElement();
> languageAvailabilityChecker.checkLanguageAvailability(text);
> MarkedContentInfo mci =
> logicalStructureHandler.addTextContentItem(structElem);
> - String actualText = getContext().isHyphenated() ?
> text.substring(0, text.length() - 1) : null;
> +// String actualText = getContext().isHyphenated() ?
> text.substring(0, text.length() - 1) : null;
> + String actualText = null;
> generator.endTextObject();
> generator.updateColor(state.getTextColor(), true, null);
> generator.beginTextObject(mci.tag, mci.mcid, actualText);
> @@ -490,6 +491,15 @@
> float glyphAdjust = 0;
> if (font.hasCodePoint(orgChar)) {
> ch = font.mapCodePoint(orgChar);
> + if (orgChar ==
> '\u00ad' && ch == '\u002d'){
> + // Map it
> back to the SHY, the hard hyphen is not correct, causes the hyphenated words
> not being searchable.
> + // See the
> PDF Spec: 14.8.2.2.3 Incidental Artifacts / Hyphenation paragraph.
> +
> + // The ansi
> encoding CodePointMapping has the hyphenation char with two entries,
> + // the first
> is selected, the hard hyphen. Reverting...
> + ch = orgChar;
> + }
> +
> ch = selectAndMapSingleByteFont(tf, fontName, fontSize,
> textutil, ch);
> if ((wordSpacing != 0) &&
> CharUtilities.isAdjustableSpace(orgChar)) {
> glyphAdjust += wordSpacing;
> {code}
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