com.gargoylesoftware.css.dom.CSSStyleDeclarationImpl Maven / Gradle / Ivy
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/*
* Copyright (c) 2019-2021 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.Serializable;
import java.util.ArrayList;
import java.util.List;
import org.w3c.dom.DOMException;
import com.gargoylesoftware.css.parser.CSSErrorHandler;
import com.gargoylesoftware.css.parser.CSSOMParser;
import com.gargoylesoftware.css.util.LangUtils;
import com.gargoylesoftware.css.util.ThrowCssExceptionErrorHandler;
/**
* Implementation of CSSStyleDeclaration.
*
* @author Ronald Brill
*/
public class CSSStyleDeclarationImpl implements Serializable {
private static final String PRIORITY_IMPORTANT = "important";
private final AbstractCSSRuleImpl parentRule_;
private final List properties_ = new ArrayList<>();
/**
* Ctor.
*
* @param parentRule the parent role
*/
public CSSStyleDeclarationImpl(final AbstractCSSRuleImpl parentRule) {
parentRule_ = parentRule;
}
/**
* @return the properties
*/
public List getProperties() {
return properties_;
}
/**
* @return the current css text
*/
public String getCssText() {
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < properties_.size(); ++i) {
final Property p = properties_.get(i);
if (p != null) {
sb.append(p);
}
if (i < properties_.size() - 1) {
sb.append(";");
sb.append(' ');
}
}
return sb.toString();
}
/**
* Sets the css text.
* @param cssText the new css text
* @throws DOMException in case of error
*/
public void setCssText(final String cssText) throws DOMException {
setCssText(cssText, ThrowCssExceptionErrorHandler.INSTANCE);
}
/**
* Sets the css text.
* @param cssText the new css text
* @param cssErrorHandler the CSSErrorHandler to be used
* @throws DOMException in case of error
*/
public void setCssText(final String cssText, final CSSErrorHandler cssErrorHandler) throws DOMException {
try {
final CSSOMParser parser = new CSSOMParser();
parser.setErrorHandler(cssErrorHandler);
properties_.clear();
parser.parseStyleDeclaration(this, cssText);
}
catch (final Exception e) {
throw new DOMExceptionImpl(
DOMException.SYNTAX_ERR,
DOMExceptionImpl.SYNTAX_ERROR,
e.getMessage());
}
}
/**
* @param propertyName the property name
* @return the property value
*/
public String getPropertyValue(final String propertyName) {
final Property p = getPropertyDeclaration(propertyName);
if (p == null || p.getValue() == null) {
return "";
}
return p.getValue().toString();
}
/**
* @param propertyName the property name
* @return the property value
*/
public CSSValueImpl getPropertyCSSValue(final String propertyName) {
final Property p = getPropertyDeclaration(propertyName);
return (p == null) ? null : p.getValue();
}
/**
* Remove a property.
*
* @param propertyName the property name
* @return the removed property
* @throws DOMException in case of error
*/
public String removeProperty(final String propertyName) throws DOMException {
if (null == propertyName) {
return "";
}
for (int i = 0; i < properties_.size(); i++) {
final Property p = properties_.get(i);
if (p != null && propertyName.equalsIgnoreCase(p.getName())) {
properties_.remove(i);
if (p.getValue() == null) {
return "";
}
return p.getValue().toString();
}
}
return "";
}
/**
* @param propertyName the name of the property
* @return the priority
*/
public String getPropertyPriority(final String propertyName) {
final Property p = getPropertyDeclaration(propertyName);
if (p == null) {
return "";
}
return p.isImportant() ? PRIORITY_IMPORTANT : "";
}
/**
* Set a property.
* @param propertyName the name of the property
* @param value the new value
* @param priority the priority
* @throws DOMException in case of error
*/
public void setProperty(
final String propertyName,
final String value,
final String priority) throws DOMException {
try {
CSSValueImpl expr = null;
if (!value.isEmpty()) {
final CSSOMParser parser = new CSSOMParser();
expr = parser.parsePropertyValue(value);
}
Property p = getPropertyDeclaration(propertyName);
final boolean important = PRIORITY_IMPORTANT.equalsIgnoreCase(priority);
if (p == null) {
p = new Property(propertyName, expr, important);
addProperty(p);
}
else {
p.setValue(expr);
p.setImportant(important);
}
}
catch (final Exception e) {
throw new DOMExceptionImpl(
DOMException.SYNTAX_ERR,
DOMExceptionImpl.SYNTAX_ERROR,
e.getMessage());
}
}
/**
* @return the properties count
*/
public int getLength() {
return properties_.size();
}
/**
* @return the parent rule
*/
public AbstractCSSRuleImpl getParentRule() {
return parentRule_;
}
/**
* Add a property.
* @param p the property to add
*/
public void addProperty(final Property p) {
if (null == p) {
return;
}
properties_.add(p);
}
/**
* @param propertyName the name of the propery
* @return the property
*/
public Property getPropertyDeclaration(final String propertyName) {
if (null == propertyName) {
return null;
}
for (int i = properties_.size() - 1; i > -1; i--) {
final Property p = properties_.get(i);
if (p != null && propertyName.equalsIgnoreCase(p.getName())) {
return p;
}
}
return null;
}
@Override
public String toString() {
return getCssText();
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof CSSStyleDeclarationImpl)) {
return false;
}
final CSSStyleDeclarationImpl csd = (CSSStyleDeclarationImpl) obj;
// don't use parentRule in equals()
// recursive loop -> stack overflow!
return equalsProperties(csd);
}
private boolean equalsProperties(final CSSStyleDeclarationImpl csd) {
if ((csd == null) || (getLength() != csd.getLength())) {
return false;
}
for (final Property property : properties_) {
final String propertyName = property.getName();
// CSSValue propertyCSSValue1 = getPropertyCSSValue(propertyName);
// CSSValue propertyCSSValue2 = csd.getPropertyCSSValue(propertyName);
final String propertyValue1 = getPropertyValue(propertyName);
final String propertyValue2 = csd.getPropertyValue(propertyName);
if (!LangUtils.equals(propertyValue1, propertyValue2)) {
return false;
}
final String propertyPriority1 = getPropertyPriority(propertyName);
final String propertyPriority2 = csd.getPropertyPriority(propertyName);
if (!LangUtils.equals(propertyPriority1, propertyPriority2)) {
return false;
}
}
return true;
}
@Override
public int hashCode() {
int hash = LangUtils.HASH_SEED;
// don't use parentRule in hashCode()
// recursive loop -> stack overflow!
hash = LangUtils.hashCode(hash, properties_);
return hash;
}
}
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