com.google.common.css.compiler.ast.CssDeclarationNode.java Source code

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Here is the source code for com.google.common.css.compiler.ast.CssDeclarationNode.java

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/*
 * Copyright 2008 Google Inc.
 *
 * 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.google.common.css.compiler.ast;

import com.google.common.base.Preconditions;

import java.util.List;

import javax.annotation.Nullable;

/**
 * A node representing a CSS declaration in the abstract syntax tree.
 * For example: <code>background: red</code>
 *
 * @author oana@google.com (Oana Florescu)
 */
public class CssDeclarationNode extends CssNode {
    /** The node representing the property. */
    private CssPropertyNode propertyName;
    /** The value given to the property. */
    private CssPropertyValueNode propertyValue;
    /**
     * This will be set to true if this declaration node has a "star-hack"
     * (has a star before the property name).
     */
    private boolean hasStarHack;

    /**
     * Constructor of a node representing a CSS declaration.
     *
     * @param propertyName
     */
    public CssDeclarationNode(CssPropertyNode propertyName) {
        this(propertyName, new CssPropertyValueNode());
    }

    /**
     * Constructor of a node representing a CSS declaration.
     *
     * @param propertyName
     * @param comments
     */
    public CssDeclarationNode(CssPropertyNode propertyName, List<CssCommentNode> comments) {
        this(propertyName, new CssPropertyValueNode(), comments);
    }

    /**
     * Constructor of a node representing a CSS declaration.
     *
     * @param propertyName
     * @param propertyValue
     */
    public CssDeclarationNode(CssPropertyNode propertyName, CssPropertyValueNode propertyValue) {
        this(propertyName, propertyValue, null);
    }

    /**
     * Constructor of a node representing a CSS declaration.
     *
     * @param propertyName
     * @param propertyValue
     * @param comments
     */
    public CssDeclarationNode(CssPropertyNode propertyName, CssPropertyValueNode propertyValue,
            @Nullable List<CssCommentNode> comments) {
        this(propertyName, propertyValue, comments, false);
    }

    /**
     * Constructor of a node representing a CSS declaration.
     *
     * @param propertyName
     * @param propertyValue
     * @param comments
     * @param hasStarHack
     */
    public CssDeclarationNode(CssPropertyNode propertyName, CssPropertyValueNode propertyValue,
            @Nullable List<CssCommentNode> comments, boolean hasStarHack) {
        super(null, comments, null);
        this.propertyName = propertyName;
        this.propertyValue = propertyValue;
        becomeParentForNode(this.propertyName);
        becomeParentForNode(this.propertyValue);
        this.setStarHack(hasStarHack);
    }

    /**
     * Copy constructor.
     *
     * @param node
     */
    public CssDeclarationNode(CssDeclarationNode node) {
        this(node.getPropertyName().deepCopy(), node.getPropertyValue().deepCopy(), node.getComments(),
                node.hasStarHack());
    }

    @Override
    public CssDeclarationNode deepCopy() {
        return new CssDeclarationNode(this);
    }

    public CssPropertyNode getPropertyName() {
        return propertyName;
    }

    public void setPropertyName(CssPropertyNode propertyName) {
        Preconditions.checkNotNull(propertyName);
        removeAsParentOfNode(this.propertyName);
        this.propertyName = propertyName;
        becomeParentForNode(this.propertyName);
    }

    public CssPropertyValueNode getPropertyValue() {
        return propertyValue;
    }

    public void setPropertyValue(CssPropertyValueNode propertyValue) {
        Preconditions.checkNotNull(propertyValue);
        removeAsParentOfNode(this.propertyValue);
        this.propertyValue = propertyValue;
        becomeParentForNode(this.propertyValue);
    }

    /**
     * Sets the hasStarHack attribute to the given value.
     *
     * @param hasStarHack
     */
    public void setStarHack(boolean hasStarHack) {
        this.hasStarHack = hasStarHack;
    }

    /**
     * Returns the value of this node's {@code hasStarHack} attribute.
     *
     * @return {@code true} if this node's {@code hasStarHack} is set to true.
     */
    public boolean hasStarHack() {
        return hasStarHack;
    }

    /**
     * For debugging only.
     */
    @Override
    public String toString() {
        String output = "";
        if (!getComments().isEmpty()) {
            output = getComments().toString();
        }
        if (hasStarHack()) {
            output = "*";
        }
        output += getPropertyName().getValue() + ":" + getPropertyValue();

        return output;
    }
}