com.gargoylesoftware.css.dom.MediaListImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2018 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.Serializable;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
import org.w3c.dom.DOMException;
import org.w3c.dom.stylesheets.MediaList;
import com.gargoylesoftware.css.parser.AbstractLocatable;
import com.gargoylesoftware.css.parser.CSSOMParser;
import com.gargoylesoftware.css.parser.CSSParseException;
import com.gargoylesoftware.css.parser.InputSource;
import com.gargoylesoftware.css.parser.media.MediaQuery;
import com.gargoylesoftware.css.parser.media.MediaQueryList;
import com.gargoylesoftware.css.util.LangUtils;
import com.gargoylesoftware.css.util.ThrowCssExceptionErrorHandler;
/**
* Implements {@link MediaList}.
*
* @author Ronald Brill
*/
public class MediaListImpl extends AbstractLocatable implements MediaList, Serializable {
private List mediaQueries_;
/**
* Creates new MediaList.
* @param mediaList the media list
*/
public MediaListImpl(final MediaQueryList mediaList) {
mediaQueries_ = new ArrayList(10);
setMediaList(mediaList);
if (mediaList != null) {
setLocator(mediaList.getLocator());
}
}
@Override
public String getMediaText() {
final StringBuilder sb = new StringBuilder("");
boolean isNotFirst = false;
for (MediaQuery mediaQuery : mediaQueries_) {
if (isNotFirst) {
sb.append(", ");
}
else {
isNotFirst = true;
}
sb.append(mediaQuery.toString());
}
return sb.toString();
}
@Override
public void setMediaText(final String mediaText) throws DOMException {
final InputSource source = new InputSource(new StringReader(mediaText));
try {
final CSSOMParser parser = new CSSOMParser();
parser.setErrorHandler(ThrowCssExceptionErrorHandler.INSTANCE);
final MediaQueryList sml = parser.parseMedia(source);
setMediaList(sml);
}
catch (final CSSParseException e) {
throw new DOMException(DOMException.SYNTAX_ERR, e.getLocalizedMessage());
}
catch (final IOException e) {
throw new DOMException(DOMException.NOT_FOUND_ERR, e.getLocalizedMessage());
}
}
@Override
public int getLength() {
return mediaQueries_.size();
}
@Override
public String item(final int index) {
final MediaQuery mq = mediaQuery(index);
if (null == mq) {
return null;
}
return mq.getMedia();
}
/**
* @param index the position of the media query
* @return the media query at the given pos
*/
public MediaQuery mediaQuery(final int index) {
if (index < 0 || (index >= mediaQueries_.size())) {
return null;
}
return mediaQueries_.get(index);
}
@Override
public void deleteMedium(final String oldMedium) throws DOMException {
for (MediaQuery mediaQuery : mediaQueries_) {
final String str = mediaQuery.getMedia();
if (str.equalsIgnoreCase(oldMedium)) {
mediaQueries_.remove(mediaQuery);
return;
}
}
throw new DOMExceptionImpl(DOMException.NOT_FOUND_ERR, DOMExceptionImpl.NOT_FOUND);
}
@Override
public void appendMedium(final String newMedium) throws DOMException {
mediaQueries_.add(new MediaQuery(newMedium));
}
@Override
public String toString() {
return getMediaText();
}
public void setMedia(final List media) {
mediaQueries_.clear();
for (String medium : media) {
mediaQueries_.add(new MediaQuery(medium));
}
}
private void setMediaList(final MediaQueryList mediaList) {
if (mediaList != null) {
for (int i = 0; i < mediaList.getLength(); i++) {
mediaQueries_.add(mediaList.mediaQuery(i));
}
}
}
private boolean equalsMedia(final MediaList ml) {
if ((ml == null) || (getLength() != ml.getLength())) {
return false;
}
for (int i = 0; i < getLength(); i++) {
final String m1 = item(i);
final String m2 = ml.item(i);
if (!LangUtils.equals(m1, m2)) {
return false;
}
}
return true;
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof MediaList)) {
return false;
}
final MediaList ml = (MediaList) obj;
return super.equals(obj) && equalsMedia(ml);
}
@Override
public int hashCode() {
int hash = super.hashCode();
hash = LangUtils.hashCode(hash, mediaQueries_);
return hash;
}
}