/*
* Copyright (c) 2005, 2006, 2007 Henri Sivonen
* Copyright (c) 2007 Mozilla Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
package nu.validator.messages;
import nu.validator.messages.types.MessageType;
import nu.validator.saxtree.DocumentFragment;
import nu.validator.saxtree.TreeParser;
import nu.validator.servlet.imagereview.Image;
import nu.validator.source.SourceHandler;
import nu.validator.xml.AttributesImpl;
import nu.validator.xml.XhtmlSaxEmitter;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* @version $Id: XhtmlMessageEmitter.java 54 2007-09-20 15:37:38Z hsivonen $
* @author hsivonen
*/
public class XhtmlMessageEmitter extends MessageEmitter implements ImageReviewHandler {
private static final int IMAGE_CLAMP = 180;
private static final char[] COLON_SPACE = { ':', ' ' };
private static final char[] PERIOD = { '.' };
private static final char[] ON_LINE = "On line ".toCharArray();
private static final char[] AT_LINE = "At line ".toCharArray();
private static final char[] FROM_LINE = "From line ".toCharArray();
private static final char[] TO_LINE = "; to line ".toCharArray();
private static final char[] COLUMN = ", column ".toCharArray();
private static final char[] IN_RESOURCE = " in resource ".toCharArray();
private static final char[] NOT_RESOLVABLE = "Not resolvable".toCharArray();
private static final char[] EMPTY_STRING_AS_ALT = "Omit image in non-graphical presentation".toCharArray();
private static final char[] NO_ALT = "Not available".toCharArray();
private static final char[] IMAGE = "Image".toCharArray();
private static final char[] TEXTUAL_ALTERNATIVE = "Textual alternative".toCharArray();
private static final char[] LOCATION = "Location".toCharArray();
private static final char[] IMAGE_REPORT = "Image report".toCharArray();
private static final char[] SOURCE_CODE = "Source".toCharArray();
private final AttributesImpl attrs = new AttributesImpl();
private boolean listOpen = false;
private final ContentHandler contentHandler;
private final XhtmlSaxEmitter emitter;
private final XhtmlMessageTextHandler messageTextHandler;
private final XhtmlExtractHandler extractHandler;
private boolean textEmitted;
private String systemId;
private int oneBasedFirstLine;
private int oneBasedFirstColumn;
private int oneBasedLastLine;
private int oneBasedLastColumn;
private boolean exact;
private boolean willShowSource;
private final TreeParser treeParser;
/**
* @param contentHandler
*/
public XhtmlMessageEmitter(ContentHandler contentHandler) {
super();
this.contentHandler = contentHandler;
this.emitter = new XhtmlSaxEmitter(contentHandler);
this.messageTextHandler = new XhtmlMessageTextHandler(emitter);
this.extractHandler = new XhtmlExtractHandler(emitter);
this.treeParser = new TreeParser(contentHandler, null);
}
private void maybeOpenList() throws SAXException {
if (!this.listOpen) {
this.emitter.startElement("ol");
this.listOpen = true;
}
}
private void emitErrorLevel(char[] level) throws SAXException {
this.emitter.startElement("strong");
this.emitter.characters(level);
this.emitter.endElement("strong");
}
@Override
public void endMessage() throws SAXException {
maybeCloseTextPara();
this.emitter.endElement("li");
}
private void maybeCloseTextPara() throws SAXException {
if (!textEmitted) {
this.emitter.characters(PERIOD);
this.emitter.endElement("p");
maybeEmitLocation(true);
}
}
private void maybeEmitLocation(boolean withPara) throws SAXException {
if (oneBasedLastLine == -1 && systemId == null) {
return;
}
if (withPara) {
this.emitter.startElementWithClass("p", "location");
}
if (oneBasedLastLine == -1) {
emitSystemId();
} else if (oneBasedLastColumn == -1) {
emitLineLocation();
} else if (oneBasedFirstLine == -1
|| (oneBasedFirstLine == oneBasedLastLine && oneBasedFirstColumn == oneBasedLastColumn)) {
emitSingleLocation();
} else {
emitRangeLocation();
}
if (withPara) {
this.emitter.endElement("p");
}
}
/**
* @throws SAXException
*/
private void maybeEmitInResource() throws SAXException {
if (systemId != null) {
this.emitter.characters(IN_RESOURCE);
emitSystemId();
}
}
/**
* @throws SAXException
*/
private void emitSystemId() throws SAXException {
this.emitter.startElementWithClass("span", "url");
this.emitter.characters(systemId);
this.emitter.endElement("span");
}
private void emitRangeLocation() throws SAXException {
if (willShowSource && systemId == null) {
attrs.clear();
attrs.addAttribute("href", "#l" + oneBasedLastLine + "c" + oneBasedLastColumn);
emitter.startElement("a", attrs);
}
this.emitter.characters(FROM_LINE);
this.emitter.startElementWithClass("span", "first-line");
this.emitter.characters(Integer.toString(oneBasedFirstLine));
this.emitter.endElement("span");
this.emitter.characters(COLUMN);
this.emitter.startElementWithClass("span", "first-col");
this.emitter.characters(Integer.toString(oneBasedFirstColumn));
this.emitter.endElement("span");
this.emitter.characters(TO_LINE);
this.emitter.startElementWithClass("span", "last-line");
this.emitter.characters(Integer.toString(oneBasedLastLine));
this.emitter.endElement("span");
this.emitter.characters(COLUMN);
this.emitter.startElementWithClass("span", "last-col");
this.emitter.characters(Integer.toString(oneBasedLastColumn));
this.emitter.endElement("span");
maybeEmitInResource();
if (willShowSource && systemId == null) {
emitter.endElement("a");
}
}
private void emitSingleLocation() throws SAXException {
if (willShowSource && systemId == null) {
attrs.clear();
attrs.addAttribute("href", "#cl" + oneBasedLastLine + "c" + oneBasedLastColumn);
emitter.startElement("a", attrs);
}
this.emitter.characters(AT_LINE);
this.emitter.startElementWithClass("span", "last-line");
this.emitter.characters(Integer.toString(oneBasedLastLine));
this.emitter.endElement("span");
this.emitter.characters(COLUMN);
this.emitter.startElementWithClass("span", "last-col");
this.emitter.characters(Integer.toString(oneBasedLastColumn));
this.emitter.endElement("span");
maybeEmitInResource();
if (willShowSource && systemId == null) {
emitter.endElement("a");
}
}
private void emitLineLocation() throws SAXException {
if (willShowSource && systemId == null) {
attrs.clear();
attrs.addAttribute("href", "#l" + oneBasedLastLine);
emitter.startElement("a", attrs);
}
this.emitter.characters(ON_LINE);
this.emitter.startElementWithClass("span", "last-line");
this.emitter.characters(Integer.toString(oneBasedLastLine));
this.emitter.endElement("span");
maybeEmitInResource();
if (willShowSource && systemId == null) {
emitter.endElement("a");
}
}
@Override
public void startMessage(MessageType type, String aSystemId,
int aOneBasedFirstLine, int aOneBasedFirstColumn,
int aOneBasedLastLine, int aOneBasedLastColumn, boolean aExact)
throws SAXException {
this.systemId = aSystemId;
this.oneBasedFirstLine = aOneBasedFirstLine;
this.oneBasedFirstColumn = aOneBasedFirstColumn;
this.oneBasedLastLine = aOneBasedLastLine;
this.oneBasedLastColumn = aOneBasedLastColumn;
this.exact = aExact;
this.maybeOpenList();
this.emitter.startElementWithClass("li", type.getFlatType());
this.emitter.startElement("p");
emitErrorLevel(type.getPresentationName());
this.textEmitted = false;
}
/**
* @see nu.validator.messages.MessageEmitter#endMessages()
*/
@Override
public void endMessages() throws SAXException {
maybeCloseList();
}
/**
* @throws SAXException
*/
private void maybeCloseList() throws SAXException {
if (this.listOpen) {
this.emitter.endElement("ol");
this.listOpen = false;
}
}
/**
* @see nu.validator.messages.MessageEmitter#endText()
*/
@Override
public void endText() throws SAXException {
this.emitter.endElement("span");
this.emitter.endElement("p");
this.textEmitted = true;
maybeEmitLocation(true);
}
/**
* @see nu.validator.messages.MessageEmitter#startMessages(java.lang.String)
*/
@Override
public void startMessages(String documentUri, @SuppressWarnings("hiding")
boolean willShowSource) throws SAXException {
this.willShowSource = willShowSource;
}
/**
* @see nu.validator.messages.MessageEmitter#startText()
*/
@Override
public MessageTextHandler startText() throws SAXException {
this.emitter.characters(COLON_SPACE);
this.emitter.startElement("span");
return messageTextHandler;
}
/**
* @see nu.validator.messages.MessageEmitter#endSource()
*/
@Override
public void endSource() throws SAXException {
emitter.endElement("code");
emitter.endElement("p");
}
/**
* @throws SAXException
* @see nu.validator.messages.MessageEmitter#startSource()
*/
@Override
public SourceHandler startSource() throws SAXException {
maybeCloseTextPara();
emitter.startElementWithClass("p", "extract");
emitter.startElement("code");
return extractHandler;
}
/**
* @see nu.validator.messages.MessageEmitter#endFullSource()
*/
@Override
public void endFullSource() throws SAXException {
}
/**
* @see nu.validator.messages.MessageEmitter#startFullSource(int)
*/
@Override
public SourceHandler startFullSource(int lineOffset) throws SAXException {
maybeCloseList();
attrs.clear();
attrs.addAttribute("id", "source");
this.emitter.startElement("h2", attrs);
this.emitter.characters(SOURCE_CODE);
this.emitter.endElement("h2");
return new XhtmlSourceHandler(emitter, lineOffset);
}
/**
* @see nu.validator.messages.MessageEmitter#endResult()
*/
@Override
public void endResult() throws SAXException {
}
/**
* @see nu.validator.messages.MessageEmitter#startResult()
*/
@Override
public ResultHandler startResult() throws SAXException {
maybeCloseList();
return new XhtmlResultHandler(emitter);
}
/**
* @see nu.validator.messages.MessageEmitter#endElaboration()
*/
@Override
public void endElaboration() throws SAXException {
}
/**
* @see nu.validator.messages.MessageEmitter#startElaboration()
*/
@Override
public ContentHandler startElaboration() throws SAXException {
return contentHandler;
}
/**
* @see nu.validator.messages.MessageEmitter#endImageReview()
*/
@Override
public void endImageReview() throws SAXException {
}
/**
* @see nu.validator.messages.MessageEmitter#startImageReview()
*/
@Override
public ImageReviewHandler startImageReview(DocumentFragment instruction, boolean fatal) throws SAXException {
attrs.clear();
attrs.addAttribute("id", "imagereport");
this.emitter.startElement("h2", attrs);
this.emitter.characters(IMAGE_REPORT);
this.emitter.endElement("h2");
treeParser.parse(instruction);
return this;
}
public void endImageGroup() throws SAXException {
this.emitter.endElement("tbody");
this.emitter.endElement("table");
}
public void image(Image image, boolean showAlt, String aSystemId,
int aOneBasedFirstLine, int aOneBasedFirstColumn,
int aOneBasedLastLine, int aOneBasedLastColumn) throws SAXException {
this.systemId = null;
this.oneBasedFirstLine = aOneBasedFirstLine;
this.oneBasedFirstColumn = aOneBasedFirstColumn;
this.oneBasedLastLine = aOneBasedLastLine;
this.oneBasedLastColumn = aOneBasedLastColumn;
this.emitter.startElement("tr");
imageCell(image);
if (showAlt) {
altCell(image.getAlt(), image.getLang(), image.isRtl());
}
locationCell();
this.emitter.endElement("tr");
}
private void locationCell() throws SAXException {
this.emitter.startElementWithClass("td", "location");
maybeEmitLocation(false);
this.emitter.endElement("td");
}
private void altCell(String alt, String lang, boolean rtl) throws SAXException {
attrs.clear();
attrs.addAttribute("class", "alt");
if (rtl && !(alt == null || "".equals(alt))) {
attrs.addAttribute("dir", "rtl");
}
this.emitter.startElement("td", attrs);
if (alt == null) {
this.emitter.startElement("i");
this.emitter.characters(NO_ALT);
this.emitter.endElement("i");
} else if ("".equals(alt)) {
this.emitter.startElement("i");
this.emitter.characters(EMPTY_STRING_AS_ALT);
this.emitter.endElement("i");
} else {
attrs.clear();
attrs.addAttribute("http://www.w3.org/XML/1998/namespace", "lang", "xml:lang", "CDATA", lang);
this.emitter.startElement("span", attrs);
this.emitter.characters(alt);
this.emitter.endElement("span");
}
this.emitter.endElement("td");
}
private void imageCell(Image image) throws SAXException {
this.emitter.startElementWithClass("td", "img");
String src = image.getSrc();
if (src == null) {
this.emitter.startElement("i");
this.emitter.characters(NOT_RESOLVABLE);
this.emitter.endElement("i");
} else {
int width = image.getWidth();
int height = image.getHeight();
if (width < 1 || height < 1) {
width = height = -1;
} else if (width > height) {
if (width > IMAGE_CLAMP) {
height = (int) Math.ceil(height * (((double)IMAGE_CLAMP)/((double)width)));
width = IMAGE_CLAMP;
}
} else {
if (height > IMAGE_CLAMP) {
width = (int) Math.ceil(width * (((double)IMAGE_CLAMP)/((double)height)));
height = IMAGE_CLAMP;
}
}
attrs.clear();
attrs.addAttribute("src", src);
if (width != -1) {
attrs.addAttribute("width", Integer.toString(width));
attrs.addAttribute("height", Integer.toString(height));
}
this.emitter.startElement("img", attrs);
this.emitter.endElement("img");
}
this.emitter.endElement("td");
}
public void startImageGroup(char[] heading, DocumentFragment instruction,
boolean hasAlt) throws SAXException {
this.emitter.startElement("h3");
this.emitter.characters(heading);
this.emitter.endElement("h3");
treeParser.parse(instruction);
this.emitter.startElementWithClass("table", "imagereview");
this.emitter.startElement("colgroup");
this.emitter.startElementWithClass("col", "img");
this.emitter.endElement("col");
if (hasAlt) {
this.emitter.startElementWithClass("col", "alt");
this.emitter.endElement("col");
}
this.emitter.startElementWithClass("col", "location");
this.emitter.endElement("col");
this.emitter.endElement("colgroup");
this.emitter.startElement("thead");
this.emitter.startElement("tr");
this.emitter.startElementWithClass("th", "img");
this.emitter.characters(IMAGE);
this.emitter.endElement("th");
if (hasAlt) {
this.emitter.startElementWithClass("th", "alt");
this.emitter.characters(TEXTUAL_ALTERNATIVE);
this.emitter.endElement("th");
}
this.emitter.startElementWithClass("th", "location");
this.emitter.characters(LOCATION);
this.emitter.endElement("th");
this.emitter.endElement("tr");
this.emitter.endElement("thead");
this.emitter.startElement("tbody");
}
}