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/*******************************************************************************
* Copyright (c) 2004, 2010 John Krasnay and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* John Krasnay - initial API and implementation
* Florian Thienel - bug 306639 - remove serializability from StyleSheet
* and dependend classes
* Igor Jacy Lino Campista - Java 5 warnings fixed (bug 311325)
*******************************************************************************/
package org.eclipse.vex.core.internal.css;
import java.io.CharArrayReader;
import java.io.IOException;
import java.io.Reader;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.wst.common.uriresolver.internal.provisional.URIResolver;
import org.eclipse.wst.common.uriresolver.internal.provisional.URIResolverPlugin;
import org.w3c.css.sac.CSSException;
import org.w3c.css.sac.DocumentHandler;
import org.w3c.css.sac.InputSource;
import org.w3c.css.sac.LexicalUnit;
import org.w3c.css.sac.Parser;
import org.w3c.css.sac.SACMediaList;
import org.w3c.css.sac.Selector;
import org.w3c.css.sac.SelectorList;
/**
* Driver for the creation of StyleSheet objects.
*/
public class StyleSheetReader {
private static final URIResolver URI_RESOLVER = URIResolverPlugin.createResolver();
public static Parser createParser() {
return new org.apache.batik.css.parser.Parser();
}
/**
* Creates a new StyleSheet object from a URL.
*
* @param url
* URL from which to read the style sheet.
*/
public StyleSheet read(URL url) throws IOException {
return this.read(new InputSource(url.toString()), url);
}
/**
* Creates a style sheet from a string. This is mainly used for small style
* sheets within unit tests.
*
* @param s
* String containing the style sheet.
*/
public StyleSheet read(String s) throws CSSException, IOException {
Reader reader = new CharArrayReader(s.toCharArray());
return this.read(new InputSource(reader), null);
}
/**
* Creates a new Stylesheet from an input source.
*
* @param inputSource
* InputSource from which to read the stylesheet.
* @param url
* URL representing the input source, used to resolve @import
* rules with relative URIs. May be null, in which case @import
* rules are ignored.
*/
public StyleSheet read(InputSource inputSource, URL url) throws CSSException, IOException {
final Parser parser = createParser();
final List<Rule> rules = new ArrayList<Rule>();
final StyleSheetBuilder styleSheetBuilder = new StyleSheetBuilder(rules, url);
parser.setDocumentHandler(styleSheetBuilder);
parser.parseStyleSheet(inputSource);
return new StyleSheet(rules);
}
// ======================================================== PRIVATE
private static class StyleSheetBuilder implements DocumentHandler {
// The rules that will be added to the stylesheet
private final List<Rule> rules;
// The rules to which decls are currently being added
private List<Rule> currentRules;
// URL from which @import rules relative URIs are resolved.
// May be null!
private final URL url;
public StyleSheetBuilder(List<Rule> rules, URL url) {
this.rules = rules;
this.url = url;
}
// -------------------------------------------- DocumentHandler methods
public void comment(java.lang.String text) {
}
public void endDocument(InputSource source) {
}
public void endFontFace() {
}
public void endMedia(SACMediaList media) {
}
public void endPage(String name, String pseudo_page) {
}
public void endSelector(SelectorList selectors) {
this.rules.addAll(this.currentRules);
this.currentRules = null;
}
public void ignorableAtRule(String atRule) {
}
public void importStyle(String uri, SACMediaList media, String defaultNamespaceURI) {
if (this.url == null)
return;
try {
final Parser parser = createParser();
final URL importUrl = new URL(URI_RESOLVER.resolve(this.url.toString(), null, uri));
final StyleSheetBuilder styleSheetBuilder = new StyleSheetBuilder(rules, importUrl);
parser.setDocumentHandler(styleSheetBuilder);
parser.parseStyleSheet(new InputSource(importUrl.toString()));
} catch (CSSException e) {
System.out.println("Cannot parse stylesheet " + uri + ": " + e.getMessage());
} catch (IOException e) {
System.out.println("Cannot read stylesheet " + uri + ": " + e.getMessage());
}
}
public void namespaceDeclaration(String prefix, String uri) {
}
public void property(String name, LexicalUnit value, boolean important) {
if (name.equals(CSS.BORDER)) {
this.expandBorder(value, important);
} else if (name.equals(CSS.BORDER_BOTTOM)) {
this.expandBorder(value, CSS.BORDER_BOTTOM, important);
} else if (name.equals(CSS.BORDER_LEFT)) {
this.expandBorder(value, CSS.BORDER_LEFT, important);
} else if (name.equals(CSS.BORDER_RIGHT)) {
this.expandBorder(value, CSS.BORDER_RIGHT, important);
} else if (name.equals(CSS.BORDER_TOP)) {
this.expandBorder(value, CSS.BORDER_TOP, important);
} else if (name.equals(CSS.BORDER_COLOR)) {
this.expandBorderColor(value, important);
} else if (name.equals(CSS.BORDER_STYLE)) {
this.expandBorderStyle(value, important);
} else if (name.equals(CSS.BORDER_WIDTH)) {
this.expandBorderWidth(value, important);
} else if (name.equals(CSS.FONT)) {
this.expandFont(value, important);
} else if (name.equals(CSS.MARGIN)) {
this.expandMargin(value, important);
} else if (name.equals(CSS.PADDING)) {
this.expandPadding(value, important);
} else {
this.addDecl(name, value, important);
}
}
public void startDocument(InputSource source) {
}
public void startFontFace() {
}
public void startMedia(SACMediaList media) {
}
public void startPage(String name, String pseudo_page) {
}
public void startSelector(SelectorList selectors) {
this.currentRules = new ArrayList<Rule>();
for (int i = 0; i < selectors.getLength(); i++) {
final Selector selector = selectors.item(i);
this.currentRules.add(new Rule(selector));
}
}
// ----------------------------------------- DocumentHandler methods end
// ======================================================= PRIVATE
/**
* Adds a PropertyDecl to the current set of rules.
*/
private void addDecl(String name, LexicalUnit value, boolean important) {
for (Rule rule : this.currentRules) {
rule.add(new PropertyDecl(rule, name, value, important));
}
}
/**
* Expand the "border" shorthand property.
*/
private void expandBorder(LexicalUnit value, boolean important) {
this.expandBorder(value, CSS.BORDER_BOTTOM, important);
this.expandBorder(value, CSS.BORDER_LEFT, important);
this.expandBorder(value, CSS.BORDER_RIGHT, important);
this.expandBorder(value, CSS.BORDER_TOP, important);
}
/**
* Expand one of the the "border-xxx" shorthand properties. whichBorder
* must be one of CSS.BORDER_BOTTOM, CSS.BORDER_LEFT, CSS.BORDER_RIGHT,
* CSS.BORDER_TOP.
*/
private void expandBorder(LexicalUnit value, String whichBorder, boolean important) {
if (AbstractProperty.isInherit(value)) {
this.addDecl(whichBorder + CSS.COLOR_SUFFIX, value, important);
this.addDecl(whichBorder + CSS.STYLE_SUFFIX, value, important);
this.addDecl(whichBorder + CSS.WIDTH_SUFFIX, value, important);
return;
}
LexicalUnit[] lus = getLexicalUnitList(value);
int i = 0;
if (BorderWidthProperty.isBorderWidth(lus[i])) {
this.addDecl(whichBorder + CSS.WIDTH_SUFFIX, lus[i], important);
i++;
}
if (i < lus.length && BorderStyleProperty.isBorderStyle(lus[i])) {
this.addDecl(whichBorder + CSS.STYLE_SUFFIX, lus[i], important);
i++;
}
if (i < lus.length && ColorProperty.isColor(lus[i])) {
this.addDecl(whichBorder + CSS.COLOR_SUFFIX, lus[i], important);
i++;
}
}
/**
* Expand the "border-color" shorthand property.
*/
private void expandBorderColor(LexicalUnit value, boolean important) {
if (AbstractProperty.isInherit(value)) {
this.addDecl(CSS.BORDER_TOP_COLOR, value, important);
this.addDecl(CSS.BORDER_LEFT_COLOR, value, important);
this.addDecl(CSS.BORDER_RIGHT_COLOR, value, important);
this.addDecl(CSS.BORDER_BOTTOM_COLOR, value, important);
return;
}
LexicalUnit[] lus = getLexicalUnitList(value);
if (lus.length >= 4) {
this.addDecl(CSS.BORDER_TOP_COLOR, lus[0], important);
this.addDecl(CSS.BORDER_RIGHT_COLOR, lus[1], important);
this.addDecl(CSS.BORDER_BOTTOM_COLOR, lus[2], important);
this.addDecl(CSS.BORDER_LEFT_COLOR, lus[3], important);
} else if (lus.length == 3) {
this.addDecl(CSS.BORDER_TOP_COLOR, lus[0], important);
this.addDecl(CSS.BORDER_LEFT_COLOR, lus[1], important);
this.addDecl(CSS.BORDER_RIGHT_COLOR, lus[1], important);
this.addDecl(CSS.BORDER_BOTTOM_COLOR, lus[2], important);
} else if (lus.length == 2) {
this.addDecl(CSS.BORDER_TOP_COLOR, lus[0], important);
this.addDecl(CSS.BORDER_LEFT_COLOR, lus[1], important);
this.addDecl(CSS.BORDER_RIGHT_COLOR, lus[1], important);
this.addDecl(CSS.BORDER_BOTTOM_COLOR, lus[0], important);
} else if (lus.length == 1) {
this.addDecl(CSS.BORDER_TOP_COLOR, lus[0], important);
this.addDecl(CSS.BORDER_LEFT_COLOR, lus[0], important);
this.addDecl(CSS.BORDER_RIGHT_COLOR, lus[0], important);
this.addDecl(CSS.BORDER_BOTTOM_COLOR, lus[0], important);
}
}
/**
* Expand the "border-style" shorthand property.
*/
private void expandBorderStyle(LexicalUnit value, boolean important) {
if (AbstractProperty.isInherit(value)) {
this.addDecl(CSS.BORDER_TOP_STYLE, value, important);
this.addDecl(CSS.BORDER_LEFT_STYLE, value, important);
this.addDecl(CSS.BORDER_RIGHT_STYLE, value, important);
this.addDecl(CSS.BORDER_BOTTOM_STYLE, value, important);
return;
}
LexicalUnit[] lus = getLexicalUnitList(value);
if (lus.length >= 4) {
this.addDecl(CSS.BORDER_TOP_STYLE, lus[0], important);
this.addDecl(CSS.BORDER_RIGHT_STYLE, lus[1], important);
this.addDecl(CSS.BORDER_BOTTOM_STYLE, lus[2], important);
this.addDecl(CSS.BORDER_LEFT_STYLE, lus[3], important);
} else if (lus.length == 3) {
this.addDecl(CSS.BORDER_TOP_STYLE, lus[0], important);
this.addDecl(CSS.BORDER_LEFT_STYLE, lus[1], important);
this.addDecl(CSS.BORDER_RIGHT_STYLE, lus[1], important);
this.addDecl(CSS.BORDER_BOTTOM_STYLE, lus[2], important);
} else if (lus.length == 2) {
this.addDecl(CSS.BORDER_TOP_STYLE, lus[0], important);
this.addDecl(CSS.BORDER_LEFT_STYLE, lus[1], important);
this.addDecl(CSS.BORDER_RIGHT_STYLE, lus[1], important);
this.addDecl(CSS.BORDER_BOTTOM_STYLE, lus[0], important);
} else if (lus.length == 1) {
this.addDecl(CSS.BORDER_TOP_STYLE, lus[0], important);
this.addDecl(CSS.BORDER_LEFT_STYLE, lus[0], important);
this.addDecl(CSS.BORDER_RIGHT_STYLE, lus[0], important);
this.addDecl(CSS.BORDER_BOTTOM_STYLE, lus[0], important);
}
}
/**
* Expand the "border-width" shorthand property.
*/
private void expandBorderWidth(LexicalUnit value, boolean important) {
if (AbstractProperty.isInherit(value)) {
this.addDecl(CSS.BORDER_TOP_WIDTH, value, important);
this.addDecl(CSS.BORDER_LEFT_WIDTH, value, important);
this.addDecl(CSS.BORDER_RIGHT_WIDTH, value, important);
this.addDecl(CSS.BORDER_BOTTOM_WIDTH, value, important);
return;
}
LexicalUnit[] lus = getLexicalUnitList(value);
if (lus.length >= 4) {
this.addDecl(CSS.BORDER_TOP_WIDTH, lus[0], important);
this.addDecl(CSS.BORDER_RIGHT_WIDTH, lus[1], important);
this.addDecl(CSS.BORDER_BOTTOM_WIDTH, lus[2], important);
this.addDecl(CSS.BORDER_LEFT_WIDTH, lus[3], important);
} else if (lus.length == 3) {
this.addDecl(CSS.BORDER_TOP_WIDTH, lus[0], important);
this.addDecl(CSS.BORDER_LEFT_WIDTH, lus[1], important);
this.addDecl(CSS.BORDER_RIGHT_WIDTH, lus[1], important);
this.addDecl(CSS.BORDER_BOTTOM_WIDTH, lus[2], important);
} else if (lus.length == 2) {
this.addDecl(CSS.BORDER_TOP_WIDTH, lus[0], important);
this.addDecl(CSS.BORDER_LEFT_WIDTH, lus[1], important);
this.addDecl(CSS.BORDER_RIGHT_WIDTH, lus[1], important);
this.addDecl(CSS.BORDER_BOTTOM_WIDTH, lus[0], important);
} else if (lus.length == 1) {
this.addDecl(CSS.BORDER_TOP_WIDTH, lus[0], important);
this.addDecl(CSS.BORDER_LEFT_WIDTH, lus[0], important);
this.addDecl(CSS.BORDER_RIGHT_WIDTH, lus[0], important);
this.addDecl(CSS.BORDER_BOTTOM_WIDTH, lus[0], important);
}
}
/**
* Expand the "font" shorthand property.
*/
private void expandFont(LexicalUnit value, boolean important) {
if (AbstractProperty.isInherit(value)) {
this.addDecl(CSS.FONT_STYLE, value, important);
this.addDecl(CSS.FONT_VARIANT, value, important);
this.addDecl(CSS.FONT_WEIGHT, value, important);
this.addDecl(CSS.FONT_SIZE, value, important);
this.addDecl(CSS.FONT_FAMILY, value, important);
return;
}
LexicalUnit[] lus = getLexicalUnitList(value);
int n = lus.length;
int i = 0;
if (i < n && FontStyleProperty.isFontStyle(lus[i])) {
this.addDecl(CSS.FONT_STYLE, lus[i], important);
i++;
}
if (i < n && FontVariantProperty.isFontVariant(lus[i])) {
this.addDecl(CSS.FONT_VARIANT, lus[i], important);
i++;
}
if (i < n && FontWeightProperty.isFontWeight(lus[i])) {
this.addDecl(CSS.FONT_WEIGHT, lus[i], important);
i++;
}
if (i < n && FontSizeProperty.isFontSize(lus[i])) {
this.addDecl(CSS.FONT_SIZE, lus[i], important);
i++;
}
if (i < n && lus[i].getLexicalUnitType() == LexicalUnit.SAC_OPERATOR_SLASH) {
i++; // gobble slash
if (i < n) {
this.addDecl(CSS.LINE_HEIGHT, lus[i], important);
}
i++;
}
if (i < n) {
this.addDecl(CSS.FONT_FAMILY, lus[i], important);
}
}
/**
* Expand the "margin" shorthand property.
*/
private void expandMargin(LexicalUnit value, boolean important) {
if (AbstractProperty.isInherit(value)) {
this.addDecl(CSS.MARGIN_TOP, value, important);
this.addDecl(CSS.MARGIN_RIGHT, value, important);
this.addDecl(CSS.MARGIN_BOTTOM, value, important);
this.addDecl(CSS.MARGIN_LEFT, value, important);
return;
}
LexicalUnit[] lus = getLexicalUnitList(value);
if (lus.length >= 4) {
this.addDecl(CSS.MARGIN_TOP, lus[0], important);
this.addDecl(CSS.MARGIN_RIGHT, lus[1], important);
this.addDecl(CSS.MARGIN_BOTTOM, lus[2], important);
this.addDecl(CSS.MARGIN_LEFT, lus[3], important);
} else if (lus.length == 3) {
this.addDecl(CSS.MARGIN_TOP, lus[0], important);
this.addDecl(CSS.MARGIN_LEFT, lus[1], important);
this.addDecl(CSS.MARGIN_RIGHT, lus[1], important);
this.addDecl(CSS.MARGIN_BOTTOM, lus[2], important);
} else if (lus.length == 2) {
this.addDecl(CSS.MARGIN_TOP, lus[0], important);
this.addDecl(CSS.MARGIN_LEFT, lus[1], important);
this.addDecl(CSS.MARGIN_RIGHT, lus[1], important);
this.addDecl(CSS.MARGIN_BOTTOM, lus[0], important);
} else if (lus.length == 1) {
this.addDecl(CSS.MARGIN_TOP, lus[0], important);
this.addDecl(CSS.MARGIN_LEFT, lus[0], important);
this.addDecl(CSS.MARGIN_RIGHT, lus[0], important);
this.addDecl(CSS.MARGIN_BOTTOM, lus[0], important);
}
}
/**
* Expand the "padding" shorthand property.
*/
private void expandPadding(LexicalUnit value, boolean important) {
if (AbstractProperty.isInherit(value)) {
this.addDecl(CSS.PADDING_TOP, value, important);
this.addDecl(CSS.PADDING_LEFT, value, important);
this.addDecl(CSS.PADDING_RIGHT, value, important);
this.addDecl(CSS.PADDING_BOTTOM, value, important);
return;
}
LexicalUnit[] lus = getLexicalUnitList(value);
if (lus.length >= 4) {
this.addDecl(CSS.PADDING_TOP, lus[0], important);
this.addDecl(CSS.PADDING_RIGHT, lus[1], important);
this.addDecl(CSS.PADDING_BOTTOM, lus[2], important);
this.addDecl(CSS.PADDING_LEFT, lus[3], important);
} else if (lus.length == 3) {
this.addDecl(CSS.PADDING_TOP, lus[0], important);
this.addDecl(CSS.PADDING_LEFT, lus[1], important);
this.addDecl(CSS.PADDING_RIGHT, lus[1], important);
this.addDecl(CSS.PADDING_BOTTOM, lus[2], important);
} else if (lus.length == 2) {
this.addDecl(CSS.PADDING_TOP, lus[0], important);
this.addDecl(CSS.PADDING_LEFT, lus[1], important);
this.addDecl(CSS.PADDING_RIGHT, lus[1], important);
this.addDecl(CSS.PADDING_BOTTOM, lus[0], important);
} else if (lus.length == 1) {
this.addDecl(CSS.PADDING_TOP, lus[0], important);
this.addDecl(CSS.PADDING_LEFT, lus[0], important);
this.addDecl(CSS.PADDING_RIGHT, lus[0], important);
this.addDecl(CSS.PADDING_BOTTOM, lus[0], important);
}
}
/**
* Returns an array of <code>LexicalUnit</code> objects, the first of
* which is given.
*/
private static LexicalUnit[] getLexicalUnitList(LexicalUnit lu) {
List<LexicalUnit> lus = new ArrayList<LexicalUnit>();
while (lu != null) {
lus.add(lu);
lu = lu.getNextLexicalUnit();
}
return lus.toArray(new LexicalUnit[lus.size()]);
}
}
}
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