/*
* Copyright (C) 1999-2017 David Schweinsberg.
*
* Licensed 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.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.steadystate.css.dom;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.StringReader;
import org.w3c.css.sac.CSSException;
import org.w3c.css.sac.InputSource;
import org.w3c.dom.DOMException;
import org.w3c.dom.css.CSSMediaRule;
import org.w3c.dom.css.CSSRule;
import org.w3c.dom.css.CSSRuleList;
import org.w3c.dom.stylesheets.MediaList;
import com.steadystate.css.format.CSSFormat;
import com.steadystate.css.parser.CSSOMParser;
import com.steadystate.css.util.LangUtils;
import com.steadystate.css.util.ThrowCssExceptionErrorHandler;
/**
* Implementation of {@link CSSMediaRule}.
*
* @author <a href="mailto:davidsch@users.sourceforge.net">David Schweinsberg</a>
* @author rbri
*/
public class CSSMediaRuleImpl extends AbstractCSSRuleImpl implements CSSMediaRule {
private static final long serialVersionUID = 6603734096445214651L;
private MediaList media_;
private CSSRuleList cssRules_;
public void setMedia(final MediaList media) {
media_ = media;
}
public void setCssRules(final CSSRuleList cssRules) {
cssRules_ = cssRules;
}
public CSSMediaRuleImpl(
final CSSStyleSheetImpl parentStyleSheet,
final CSSRule parentRule,
final MediaList media) {
super(parentStyleSheet, parentRule);
media_ = media;
}
public CSSMediaRuleImpl() {
super();
}
public short getType() {
return MEDIA_RULE;
}
/**
* {@inheritDoc}
*/
@Override
public String getCssText(final CSSFormat format) {
final StringBuilder sb = new StringBuilder("@media ");
sb.append(((MediaListImpl) getMedia()).getMediaText(format));
sb.append(" {");
for (int i = 0; i < getCssRules().getLength(); i++) {
final CSSRule rule = getCssRules().item(i);
sb.append(rule.getCssText()).append(" ");
}
sb.append("}");
return sb.toString();
}
public void setCssText(final String cssText) throws DOMException {
final CSSStyleSheetImpl parentStyleSheet = getParentStyleSheetImpl();
if (parentStyleSheet != null && parentStyleSheet.isReadOnly()) {
throw new DOMExceptionImpl(
DOMException.NO_MODIFICATION_ALLOWED_ERR,
DOMExceptionImpl.READ_ONLY_STYLE_SHEET);
}
try {
final InputSource is = new InputSource(new StringReader(cssText));
final CSSOMParser parser = new CSSOMParser();
final CSSRule r = parser.parseRule(is);
// The rule must be a media rule
if (r.getType() == CSSRule.MEDIA_RULE) {
media_ = ((CSSMediaRuleImpl) r).media_;
cssRules_ = ((CSSMediaRuleImpl) r).cssRules_;
}
else {
throw new DOMExceptionImpl(
DOMException.INVALID_MODIFICATION_ERR,
DOMExceptionImpl.EXPECTING_MEDIA_RULE);
}
}
catch (final CSSException e) {
throw new DOMExceptionImpl(
DOMException.SYNTAX_ERR,
DOMExceptionImpl.SYNTAX_ERROR,
e.getMessage());
}
catch (final IOException e) {
throw new DOMExceptionImpl(
DOMException.SYNTAX_ERR,
DOMExceptionImpl.SYNTAX_ERROR,
e.getMessage());
}
}
public MediaList getMedia() {
return media_;
}
public CSSRuleList getCssRules() {
if (cssRules_ == null) {
cssRules_ = new CSSRuleListImpl();
}
return cssRules_;
}
public int insertRule(final String rule, final int index) throws DOMException {
final CSSStyleSheetImpl parentStyleSheet = getParentStyleSheetImpl();
if (parentStyleSheet != null && parentStyleSheet.isReadOnly()) {
throw new DOMExceptionImpl(
DOMException.NO_MODIFICATION_ALLOWED_ERR,
DOMExceptionImpl.READ_ONLY_STYLE_SHEET);
}
try {
final InputSource is = new InputSource(new StringReader(rule));
final CSSOMParser parser = new CSSOMParser();
parser.setParentStyleSheet(parentStyleSheet);
parser.setErrorHandler(ThrowCssExceptionErrorHandler.INSTANCE);
// parser._parentRule is never read
// parser.setParentRule(_parentRule);
final CSSRule r = parser.parseRule(is);
// Insert the rule into the list of rules
((CSSRuleListImpl) getCssRules()).insert(r, index);
}
catch (final IndexOutOfBoundsException e) {
throw new DOMExceptionImpl(
DOMException.INDEX_SIZE_ERR,
DOMExceptionImpl.INDEX_OUT_OF_BOUNDS,
e.getMessage());
}
catch (final CSSException e) {
throw new DOMExceptionImpl(
DOMException.SYNTAX_ERR,
DOMExceptionImpl.SYNTAX_ERROR,
e.getMessage());
}
catch (final IOException e) {
throw new DOMExceptionImpl(
DOMException.SYNTAX_ERR,
DOMExceptionImpl.SYNTAX_ERROR,
e.getMessage());
}
return index;
}
public void deleteRule(final int index) throws DOMException {
final CSSStyleSheetImpl parentStyleSheet = getParentStyleSheetImpl();
if (parentStyleSheet != null && parentStyleSheet.isReadOnly()) {
throw new DOMExceptionImpl(
DOMException.NO_MODIFICATION_ALLOWED_ERR,
DOMExceptionImpl.READ_ONLY_STYLE_SHEET);
}
try {
((CSSRuleListImpl) getCssRules()).delete(index);
}
catch (final IndexOutOfBoundsException e) {
throw new DOMExceptionImpl(
DOMException.INDEX_SIZE_ERR,
DOMExceptionImpl.INDEX_OUT_OF_BOUNDS,
e.getMessage());
}
}
public void setRuleList(final CSSRuleListImpl rules) {
cssRules_ = rules;
}
@Override
public String toString() {
return getCssText();
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof CSSMediaRule)) {
return false;
}
final CSSMediaRule cmr = (CSSMediaRule) obj;
return super.equals(obj)
&& LangUtils.equals(getMedia(), cmr.getMedia())
&& LangUtils.equals(getCssRules(), cmr.getCssRules());
}
@Override
public int hashCode() {
int hash = super.hashCode();
hash = LangUtils.hashCode(hash, media_);
hash = LangUtils.hashCode(hash, cssRules_);
return hash;
}
private void writeObject(final ObjectOutputStream out) throws IOException {
out.writeObject(cssRules_);
out.writeObject(media_);
}
private void readObject(final ObjectInputStream in)
throws IOException, ClassNotFoundException {
cssRules_ = (CSSRuleList) in.readObject();
if (cssRules_ != null) {
for (int i = 0; i < cssRules_.getLength(); i++) {
final CSSRule cssRule = cssRules_.item(i);
if (cssRule instanceof AbstractCSSRuleImpl) {
((AbstractCSSRuleImpl) cssRule).setParentRule(this);
((AbstractCSSRuleImpl) cssRule).setParentStyleSheet(getParentStyleSheetImpl());
}
}
}
media_ = (MediaList) in.readObject();
}
}