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application.ui.preview.server.preview.stax.StaxPreviewParser Maven / Gradle / Ivy
package application.ui.preview.server.preview.stax;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Logger;
import javax.xml.namespace.QName;
import javax.xml.stream.Location;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.XMLEvent;
import org.daisy.braille.utils.api.table.BrailleConstants;
import org.daisy.braille.utils.api.table.BrailleConverter;
import org.daisy.braille.utils.api.table.Table;
import org.daisy.braille.utils.api.table.TableCatalog;
import org.daisy.braille.utils.impl.tools.table.DefaultTableProvider;
import org.daisy.braille.utils.pef.PEFBook;
import org.daisy.dotify.common.text.ConditionalMapper;
import org.daisy.dotify.common.text.SimpleUCharReplacer;
import org.daisy.dotify.studio.api.DocumentPosition;
import org.daisy.streamline.api.validity.ValidationReport;
import org.daisy.streamline.api.validity.ValidatorMessage;
import application.common.Settings;
import application.common.Settings.Keys;
import application.l10n.Messages;
import application.ui.preview.server.MainPage;
public class StaxPreviewParser {
private static final Logger logger = Logger.getLogger(StaxPreviewParser.class.getCanonicalName());
private static final String PEF_NS = "http://www.daisy.org/ns/2008/pef";
private static final QName VOLUME = new QName(PEF_NS, "volume");
private static final QName SECTION = new QName(PEF_NS, "section");
private static final QName PAGE = new QName(PEF_NS, "page");
private static final QName ROW = new QName(PEF_NS, "row");
private static final String HTML_NS = "http://www.w3.org/1999/xhtml";
private static final StringParser toInt = (value) -> Integer.parseInt(value);
private static final StringParser toBoolean = (value) -> Boolean.parseBoolean(value);
@FunctionalInterface
private static interface StringParser {
T toObject(String in);
}
static final ConditionalMapper NUMBER_PROCESSOR = ConditionalMapper.withTrigger('⠼')
.map("⠚⠁⠃⠉⠙⠑⠋⠛⠓⠊", "0123456789")
.putIgnorable('⠄')
.putIgnorable('⠂')
.build();
private final List volumes;
private final List volumeEndPositions;
private final PEFBook book;
private final XMLOutputFactory outFactory;
private final SimpleUCharReplacer cr;
private final MessageExtractor extractor;
private final ValidationReport report;
private int pageNumber;
private boolean abort;
private XMLStreamWriter out;
private boolean isProcessing;
private boolean used;
StaxPreviewParser(PEFBook book, ValidationReport report) {
this.book = book;
this.extractor = new MessageExtractor(report.getMessages());
this.report = report;
this.volumes = new ArrayList<>();
this.volumeEndPositions = new ArrayList<>();
this.outFactory = XMLOutputFactory.newInstance();
this.pageNumber = 1;
this.abort = false;
this.isProcessing = false;
this.used = false;
// Configures a char replacer instead of using braille converter directly in order to preserve
// the previous behavior of xpath function translate, in other words, keeping characters with
// no translation. This is not supported by the braille converter.
this.cr = new SimpleUCharReplacer();
BrailleConverter bc = getTable().newBrailleConverter();
if (bc.supportsEightDot()) {
String input = BrailleConstants.BRAILLE_PATTERNS_256;
String tr = bc.toText(input);
for (int i=0; i rows = new ArrayList<>();
while (input.hasNext()) {
event = input.nextEvent();
if (abort) { throw new ParsingCancelledException(); }
if (event.isStartElement() && ROW.equals(event.asStartElement().getName())) {
rows.add(parseRow(event, input, props));
} else if (event.isEndElement() && PAGE.equals(event.asEndElement().getName())) {
break;
}
}
writePagePreamble(pageNumber, sectionNumber, volNumber, firstPage, rows);
writeRows(rows, true, props.cols, props.rows);
writeRows(rows, false, props.cols, props.rows);
writePagePostamble();
pageNumber += props.duplex?1:2;
}
private void writeRows(List rows, boolean braille, int width, int height) throws XMLStreamException {
out.writeStartElement(HTML_NS, "div");
if (braille) {
out.writeAttribute("class", "page");
} else {
out.writeAttribute("class", "text");
}
out.writeStartElement(HTML_NS, "table");
int totalRowgap = 0;
for (Row r : rows) {
totalRowgap += r.rowgap+4;
StringBuilder classes = new StringBuilder();
classes.append(braille?"braille":"text");
classes.append(r.messages.isEmpty()?"":" issue");
writeRowPreamble(classes.toString(), r.rowgap);
String s;
if (braille) {
s = r.chars;
} else {
s = cr.replace(NUMBER_PROCESSOR.replace(r.chars)).toString();
}
out.writeCharacters(s);
int fill = width-s.length();
for (int i=0; i T getAttribute(XMLEvent event, String name, T def, StringParser val) {
Attribute attr = event.asStartElement().getAttributeByName(new QName(name));
if (attr!=null) {
return val.toObject(attr.getValue());
} else {
return def;
}
}
private static class Row {
private final String chars;
private final int rowgap;
private final List messages;
private Row(String chars, int rowgap, List messages) {
this.chars = chars;
this.rowgap = rowgap;
this.messages = messages;
}
}
private static class Context {
private final int rows;
private final int cols;
private final boolean duplex;
protected final int rowgap;
Context(int rows, int cols, boolean duplex, int rowgap) {
this.rows = rows;
this.cols = cols;
this.duplex = duplex;
this.rowgap = rowgap;
}
}
private void writePreamble(int volNumber) throws XMLStreamException {
out.writeDTD("");
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "html");
out.writeDefaultNamespace(HTML_NS);
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "head");
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "title");
Iterable it = book.getMetadata("identifier");
String title = "";
for (String s : it) {
title = s;
break;
}
out.writeCharacters("Visar " + title);
out.writeEndElement();
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "meta");
out.writeAttribute("http-equiv", "Content-Type");
out.writeAttribute("content", "text/html; charset=UTF-8");
out.writeEndElement();
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "meta");
out.writeAttribute("http-equiv", "Content-Style-Type");
out.writeAttribute("content", "text/css");
out.writeEndElement();
out.writeCharacters("\n");
writeCssLink("styles/default/base.css");
writeCssLink("styles/default/layout.css");
writeCssLink("styles/default/theme.css");
writeCssLink("styles/default/state.css");
writeCssLink("chosen/chosen.css");
writeCustomStyles();
out.writeStartElement(HTML_NS, "script");
out.writeAttribute("src", "script/shortcuts.js");
out.writeCharacters("");
out.writeEndElement();
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "script");
out.writeAttribute("src", "script/preview.js");
out.writeCharacters("");
out.writeEndElement();
out.writeCharacters("\n");
out.writeEndElement();
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "body");
out.writeAttribute("class", "preview");
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "div");
out.writeAttribute("id", "view");
writeCloseForm();
writeNavigation(volNumber);
out.writeEndElement();
writeAbout(volNumber);
out.writeStartElement(HTML_NS, "div");
out.writeAttribute("class", "volume");
out.writeAttribute("id", toSectionId(volNumber, 0));
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "p");
out.writeAttribute("class", "volume-header");
out.writeCharacters(Messages.XSLT_VOLUME_LABEL.localize() + " " + volNumber + " (" + book.getSheets(volNumber) + " " + Messages.XSLT_SHEETS_LABEL.localize() + ")");
out.writeEndElement();
out.writeCharacters("\n");
}
private void writeCloseForm() throws XMLStreamException {
out.writeStartElement(HTML_NS, "form");
out.writeAttribute("action", "#");
out.writeAttribute("method", "get");
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "p");
out.writeStartElement(HTML_NS, "span");
out.writeStartElement(HTML_NS, "a");
out.writeAttribute("href", "view.html");
out.writeCharacters(Messages.PREVIEW_VIEW.localize());
out.writeEndElement();
out.writeEndElement();
out.writeStartElement(HTML_NS, "span");
out.writeStartElement(HTML_NS, "a");
out.writeAttribute("href", "index.html?method=meta");
out.writeCharacters(Messages.XSLT_ABOUT_LABEL.localize());
out.writeEndElement();
out.writeEndElement();
out.writeStartElement(HTML_NS, "input");
out.writeAttribute("id", "connected");
out.writeAttribute("type", "submit");
out.writeAttribute("value", "");
out.writeAttribute("disabled", "disabled");
out.writeAttribute("title", "Avsluta"); //TODO: localize
out.writeCharacters("");
out.writeEndElement();
out.writeStartElement(HTML_NS, "input");
out.writeAttribute("id", "notConnected");
out.writeAttribute("type", "submit");
out.writeAttribute("value", "");
out.writeAttribute("title", "Avsluta"); //TODO: localize
out.writeAttribute("disabled", "disabled");
out.writeCharacters("");
out.writeEndElement();
out.writeEndElement();
out.writeEndElement();
out.writeCharacters("\n");
}
private void writeNavigation(int volNumber) throws XMLStreamException {
out.writeStartElement(HTML_NS, "div");
out.writeAttribute("id", "top-nav");
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "p");
out.writeStartElement(HTML_NS, "span");
out.writeStartElement(HTML_NS, "a");
out.writeAttribute("href", "#");
out.writeAttribute("onclick", "toggleViews();return false;");
out.writeAttribute("accesskey", "V"); //TODO: is this correct?
out.writeCharacters(Messages.XSLT_TOGGLE_VIEW.localize());
out.writeEndElement();
out.writeEndElement();
out.writeStartElement(HTML_NS, "span");
out.writeStartElement(HTML_NS, "select");
out.writeAttribute("onchange", "location = this.options[this.selectedIndex].value;");
out.writeAttribute("id", "volume-select");
out.writeAttribute("class", "chosen-select");
for (int i=1; i<=book.getVolumes(); i++) {
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "option");
out.writeAttribute("value", "view.html?book.xml&volume="+(i));
out.writeAttribute("title", "("+book.getSheets(i) + " " + Messages.XSLT_SHEETS_LABEL.localize() + ")");
if (i==volNumber) {
out.writeAttribute("selected", "selected");
}
out.writeCharacters(Messages.XSLT_VOLUME_LABEL.localize() + " " + i);
out.writeEndElement();
for (int j=1; j<=book.getSectionsInVolume(i); j++) {
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "option");
out.writeAttribute("value", "view.html?book.xml&volume="+(i)+"#"+toSectionId(i, j));
out.writeAttribute("title", "("+book.getSheets(i, j) + " " + Messages.XSLT_SHEETS_LABEL.localize() + ")");
out.writeEntityRef("nbsp");
out.writeEntityRef("nbsp");
out.writeEntityRef("nbsp");
out.writeCharacters(Messages.XSLT_SECTION_LABEL.localize() + " " + j);
out.writeEndElement();
}
}
out.writeEndElement();
out.writeEndElement();
out.writeStartElement(HTML_NS, "span");
out.writeCharacters(Messages.XSLT_GO_TO_PAGE_LABEL.localize());
out.writeStartElement(HTML_NS, "input");
out.writeAttribute("id", "gotoPage");
out.writeAttribute("type", "text");
out.writeAttribute("size", "4");
out.writeAttribute("onkeyup", "if (event.keyCode==13) {gotoPage();}");
out.writeAttribute("value", "1");
out.writeCharacters("");
out.writeEndElement();
out.writeEndElement();
if (report==null || !report.isValid()) {
out.writeStartElement(HTML_NS, "span");
out.writeAttribute("id", "validation-warning");
out.writeStartElement(HTML_NS, "img");
out.writeAttribute("id", "warning-image");
out.writeAttribute("src", "images/warning.png");
out.writeEndElement();
out.writeCharacters(Messages.VALIDATION_ISSUES.localize());
out.writeEndElement();
}
out.writeEndElement();
out.writeEndElement();
out.writeCharacters("\n");
}
private static String toSectionId(int volume, int section) {
return "sectionId-"+volume+"-"+section;
}
private void writeAbout(int volNumber) throws XMLStreamException {
out.writeStartElement(HTML_NS, "div");
out.writeAttribute("id", "about");
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "p");
out.writeAttribute("id", "close-bar");
out.writeStartElement(HTML_NS, "input");
out.writeAttribute("type", "button");
out.writeAttribute("onclick", "document.getElementById('about').style.visibility='hidden';");
out.writeAttribute("value", "X");
out.writeCharacters("");
out.writeEndElement();
out.writeEndElement();
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "div");
out.writeAttribute("id", "about-content");
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "p");
for (String s : orEmpty(book.getMetadata("identifier"))) {
out.writeCharacters(s);
break;
}
for (String s : orEmpty(book.getMetadata("source"))) {
out.writeCharacters(" ("+s+")");
break;
}
out.writeEndElement();
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "p");
out.writeStartElement(HTML_NS, "strong");
// TODO: This isn't very nicely done. When PEFBook returns a list instead, this can be improved
boolean hasTitle = false;
for (String s : orEmpty(book.getTitle())) {
out.writeCharacters(s);
hasTitle = true;
break;
}
if (!hasTitle) {
out.writeCharacters(Messages.UNKNOWN_TITLE.localize());
}
out.writeEndElement();
out.writeStartElement(HTML_NS, "br");
out.writeEndElement();
out.writeStartElement(HTML_NS, "strong");
// TODO: This isn't very nicely done. When PEFBook returns a list instead, this can be improved
boolean hasAuthor = false;
boolean first = true;
for (String s : orEmpty(book.getAuthors())) {
out.writeCharacters(s);
hasAuthor = true;
if (first) {
first = false;
} else {
out.writeCharacters("; ");
}
}
if (!hasAuthor) {
out.writeCharacters(Messages.UNKNOWN_AUTHOR.localize());
}
out.writeEndElement();
out.writeCharacters("");
out.writeEndElement();
out.writeCharacters("\n");
for (String s : orEmpty(book.getMetadata("date"))) {
out.writeStartElement(HTML_NS, "p");
out.writeCharacters(s);
out.writeEndElement();
out.writeCharacters("\n");
}
out.writeStartElement(HTML_NS, "p");
out.writeCharacters(Messages.XSLT_SHOWING_PAGES.localize() + ": " +
book.getFirstPage(volNumber) + "-" + book.getLastPage(volNumber));
out.writeEndElement();
out.writeCharacters("\n");
out.writeEndElement();
out.writeCharacters("\n");
out.writeEndElement();
out.writeCharacters("\n");
}
private static Iterable orEmpty(Iterable s) {
return s==null?Collections.emptyList():s;
}
private void writeCssLink(String value) throws XMLStreamException {
out.writeStartElement(HTML_NS, "link");
out.writeAttribute("rel", "stylesheet");
out.writeAttribute("type", "text/css");
out.writeAttribute("href", value);
out.writeCharacters("");
out.writeEndElement();
out.writeCharacters("\n");
}
private void writeCustomStyles() throws XMLStreamException {
String odt2braille = "odt2braille";
try {
String brailleFont = URLDecoder.decode(Settings.getSettings().getString(Keys.brailleFont, ""), MainPage.ENCODING);
String textFont = URLDecoder.decode(Settings.getSettings().getString(Keys.textFont, ""), MainPage.ENCODING);
if (!"".equals(brailleFont) || !"".equals(textFont)) {
out.writeStartElement(HTML_NS, "style");
out.writeAttribute("type", "text/css");
if (!"".equals(textFont)) {
out.writeCharacters("\n.text {\n");
out.writeCharacters("font-family: \""+textFont+"\";\n");
//This logic is ported from pef2xhtml.xsl, but I am not sure what the purpose is
if (textFont.startsWith(odt2braille)&&brailleFont.startsWith(odt2braille)) {
out.writeCharacters("letter-spacing: 0px;\n");
out.writeCharacters("font-size: 26px;\n");
} else if (textFont.startsWith(odt2braille)) {
out.writeCharacters("letter-spacing: 1px;\n");
} else {
out.writeCharacters("font-size: 20px;\n");
out.writeCharacters("letter-spacing: 0px;\n");
}
out.writeCharacters("}\n");
}
if (!"".equals(brailleFont)) {
out.writeCharacters("\n.braille {\n");
out.writeCharacters("font-family: \""+brailleFont+"\";\n");
//This logic is ported from pef2xhtml.xsl, but I am not sure what the purpose is
if (textFont.startsWith(odt2braille)&&brailleFont.startsWith(odt2braille)) {
out.writeCharacters("letter-spacing: 0px;\n");
out.writeCharacters("font-size: 26px;\n");
} else if (brailleFont.startsWith(odt2braille)) {
out.writeCharacters("font-size: 26px;\n");
} else {
out.writeCharacters("font-size: 20px;\n");
out.writeCharacters("letter-spacing: 0px;\n");
}
out.writeCharacters("}\n");
}
out.writeEndElement();
out.writeCharacters("\n");
}
} catch (UnsupportedEncodingException e) {
// should never happen if encoding is UTF-8
}
}
private void writeScripts() throws XMLStreamException {
out.writeStartElement(HTML_NS, "script");
out.writeAttribute("src", "chosen/jquery-1.6.4.min.js");
out.writeAttribute("type", "text/javascript");
out.writeCharacters("");
out.writeEndElement();
out.writeStartElement(HTML_NS, "script");
out.writeAttribute("src", "chosen/chosen.jquery.js");
out.writeAttribute("type", "text/javascript");
out.writeCharacters("");
out.writeEndElement();
out.writeStartElement(HTML_NS, "script");
out.writeAttribute("type", "text/javascript");
out.writeCharacters(
"\n var config = {\n"+
" '.chosen-select' : {},\n"+
" '.chosen-select-deselect' : {allow_single_deselect:true},\n"+
" '.chosen-select-no-single' : {disable_search_threshold:10},\n"+
" '.chosen-select-no-results': {no_results_text:'Oops, nothing found!'},\n"+
" '.chosen-select-width' : {width:\"95%\"}\n"+
" }\n"+
" for (var selector in config) {\n"+
" $(selector).chosen(config[selector]);\n"+
" }\n");
out.writeEndElement();
}
private void writePostamble() throws XMLStreamException {
out.writeEndElement();
out.writeCharacters("\n");
writeScripts();
out.writeEndElement();
out.writeCharacters("\n");
out.writeEndElement();
out.writeEndDocument();
}
private void writeSectionPreamble(int volumeNumber, int sectionNumber) throws XMLStreamException {
out.writeStartElement(HTML_NS, "div");
out.writeAttribute("class", "section");
out.writeAttribute("id", toSectionId(volumeNumber, sectionNumber));
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "p");
out.writeAttribute("class", "section-header");
out.writeCharacters(Messages.XSLT_SECTION_LABEL.localize() + " " + sectionNumber
+ " (" + book.getSheets(volumeNumber, sectionNumber)
+ " " + Messages.XSLT_SHEETS_LABEL.localize() + ")");
out.writeEndElement();
out.writeCharacters("\n");
}
private void writeSectionPostamble() throws XMLStreamException {
out.writeEndElement();
out.writeCharacters("\n");
}
private void writePagePreamble(int pageNumber, int sectionNumber, int volNumber, boolean firstPage, List rows) throws XMLStreamException {
out.writeStartElement(HTML_NS, "div");
//out.writeAttribute("id", "");
out.writeAttribute("onmouseover", "setPage("+pageNumber+");");
out.writeAttribute("class", "cont " + (firstPage?"first":pageNumber%2==0?"even":"odd"));
out.writeCharacters("\n");
rows.stream()
.flatMap(v->v.messages.stream())
.map(v->DocumentPosition.with(v.getLineNumber(), v.getColumnNumber()))
.distinct()
.forEach(m->{
try {
out.writeStartElement(HTML_NS, "span");
out.writeAttribute("id", messageId(m));
out.writeEndElement();
} catch (XMLStreamException e) {
e.printStackTrace();
}
});
out.writeStartElement(HTML_NS, "p");
out.writeAttribute("class", "page-header");
out.writeAttribute("id", "pagenum"+pageNumber);
out.writeCharacters(Messages.XSLT_VOLUME_LABEL.localize() +
" " + volNumber +
", " +
Messages.XSLT_SECTION_LABEL.localize() +
" " + sectionNumber +
" | " +
Messages.XSLT_PAGE_LABEL.localize() +
" " + pageNumber);
out.writeEndElement();
out.writeCharacters("\n");
out.writeStartElement(HTML_NS, "div");
out.writeAttribute("class", "posrel");
out.writeCharacters("\n");
}
private void writePagePostamble() throws XMLStreamException {
out.writeEndElement();
out.writeCharacters("\n");
out.writeEndElement();
out.writeCharacters("\n");
}
/**
* Gets the number of parsed volumes (may change if parsing is done on a separate thread).
* @return returns the size
*/
int getSize() {
return volumes.size();
}
/**
* Gets the parsed volumes (may change if parsing is done on a separate thread).
* @return the volumes
*/
List getVolumes() {
return Collections.unmodifiableList(volumes);
}
/**
* Gets the book on which parsing is done.
* @return returns the book
*/
PEFBook getBook() {
return book;
}
int getVolumeForPosition(DocumentPosition p) {
for (int i=volumeEndPositions.size(); i>0; i--) {
DocumentPosition vEnd = volumeEndPositions.get(i-1);
if (vEnd.isBefore(p)) {
return i+1;
}
}
return 1;
}
/**
* Stops processing and deletes temporary files.
*/
void abort() {
abort = true;
while (isProcessing) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
for (File f : volumes) {
//delete files
f.delete();
}
}
}
