com.gargoylesoftware.css.dom.CSSMediaRuleImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2019-2020 Ronald Brill.
*
* 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.gargoylesoftware.css.dom;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import org.w3c.dom.DOMException;
import com.gargoylesoftware.css.parser.CSSException;
import com.gargoylesoftware.css.parser.CSSOMParser;
import com.gargoylesoftware.css.util.LangUtils;
import com.gargoylesoftware.css.util.ThrowCssExceptionErrorHandler;
/**
* Implementation of CSSMediaRule.
*
* @author Ronald Brill
*/
public class CSSMediaRuleImpl extends AbstractCSSRuleImpl {
private MediaListImpl mediaList_;
private CSSRuleListImpl cssRules_;
/**
* Ctor.
* @param parentStyleSheet the parent style sheet
* @param parentRule the parent rule
* @param media the media
*/
public CSSMediaRuleImpl(
final CSSStyleSheetImpl parentStyleSheet,
final AbstractCSSRuleImpl parentRule,
final MediaListImpl media) {
super(parentStyleSheet, parentRule);
mediaList_ = media;
}
/**
* {@inheritDoc}
*/
@Override
public String getCssText() {
final StringBuilder sb = new StringBuilder("@media ");
sb.append(getMediaList().getMediaText());
sb.append(" {");
for (int i = 0; i < getCssRules().getLength(); i++) {
final AbstractCSSRuleImpl rule = getCssRules().getRules().get(i);
sb.append("\n ").append(rule.getCssText());
}
sb.append("\n}");
return sb.toString();
}
/**
* {@inheritDoc}
*/
@Override
public void setCssText(final String cssText) throws DOMException {
try {
final CSSOMParser parser = new CSSOMParser();
final AbstractCSSRuleImpl r = parser.parseRule(cssText);
// The rule must be a media rule
if (r instanceof CSSMediaRuleImpl) {
mediaList_ = ((CSSMediaRuleImpl) r).mediaList_;
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());
}
}
/**
* @return the media list
*/
public MediaListImpl getMediaList() {
return mediaList_;
}
/**
* @return the css rules
*/
public CSSRuleListImpl getCssRules() {
if (cssRules_ == null) {
cssRules_ = new CSSRuleListImpl();
}
return cssRules_;
}
/**
* Insert a new rule at the given index.
* @param rule the rule to be inserted
* @param index the insert pos
* @throws DOMException in case of error
*/
public void insertRule(final String rule, final int index) throws DOMException {
final CSSStyleSheetImpl parentStyleSheet = getParentStyleSheet();
try {
final CSSOMParser parser = new CSSOMParser();
parser.setParentStyleSheet(parentStyleSheet);
parser.setErrorHandler(ThrowCssExceptionErrorHandler.INSTANCE);
final AbstractCSSRuleImpl r = parser.parseRule(rule);
// Insert the rule into the list of rules
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());
}
}
/**
* Removes a rule at the given index.
* @param index the insert pos
* @throws DOMException in case of error
*/
public void deleteRule(final int index) throws DOMException {
try {
getCssRules().delete(index);
}
catch (final IndexOutOfBoundsException e) {
throw new DOMExceptionImpl(
DOMException.INDEX_SIZE_ERR,
DOMExceptionImpl.INDEX_OUT_OF_BOUNDS,
e.getMessage());
}
}
/**
* Replaces the rule list.
* @param rules the new rule list
*/
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 CSSMediaRuleImpl)) {
return false;
}
final CSSMediaRuleImpl cmr = (CSSMediaRuleImpl) obj;
return super.equals(obj)
&& LangUtils.equals(getMediaList(), cmr.getMediaList())
&& LangUtils.equals(getCssRules(), cmr.getCssRules());
}
@Override
public int hashCode() {
int hash = super.hashCode();
hash = LangUtils.hashCode(hash, mediaList_);
hash = LangUtils.hashCode(hash, cssRules_);
return hash;
}
private void writeObject(final ObjectOutputStream out) throws IOException {
out.writeObject(cssRules_);
out.writeObject(mediaList_);
}
private void readObject(final ObjectInputStream in)
throws IOException, ClassNotFoundException {
cssRules_ = (CSSRuleListImpl) in.readObject();
if (cssRules_ != null) {
for (int i = 0; i < cssRules_.getLength(); i++) {
final AbstractCSSRuleImpl cssRule = cssRules_.getRules().get(i);
cssRule.setParentRule(this);
cssRule.setParentStyleSheet(getParentStyleSheet());
}
}
mediaList_ = (MediaListImpl) in.readObject();
}
}