src/plugins/android.codeutils/src/com/motorola/studio/android/resources/AndroidProjectResources.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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.motorola.studio.android.resources;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jface.text.IDocument;

import com.motorola.studio.android.common.exception.AndroidException;
import com.motorola.studio.android.common.utilities.FileUtil;
import com.motorola.studio.android.model.resources.ResourceFile;
import com.motorola.studio.android.model.resources.types.AbstractResourceNode.NodeType;

/**
 * Class used to deal with project resource files
 */
public class AndroidProjectResources
{
    /**
     * The base path of resource files
     */
    private static final String BASE_DIR = "/res/values/";

    /**
     * The strings file
     */
    private static final String STRINGS_FILE = BASE_DIR + "strings.xml";

    /**
     * The colors file
     */
    private static final String COLORS_FILE = BASE_DIR + "colors.xml";

    /**
     * The drawables file
     */
    private static final String DRAWABLES_FILE = COLORS_FILE;

    /**
     * The dimensions file
     */
    private static final String DIMENS_FILE = BASE_DIR + "dimens.xml";

    /**
     * Prefix to refer a string on the AndroidManifest.xml file 
     */
    public static final String STRING_CALL_PREFIX = "@string/";

    /**
     * Prefix to refer a drawable on the AndroidManifest.xml file 
     */
    public static final String DRAWABLE_CALL_PREFIX = "@drawable/";

    /**
     * Prefix to refer a color on the AndroidManifest.xml file 
     */
    public static final String COLOR_CALL_PREFIX = "@color/";

    /**
     * Prefix to refer a dimension on the AndroidManifest.xml file 
     */
    public static final String DIMEN_CALL_PREFIX = "@dimen/";

    /**
     * Prefix to refer a file in the xml folder on the AndroidManifest.xml file 
     */
    public static final String XML_CALL_PREFIX = "@xml/";

    /**
     * Gets the default file path for a resource type
     * 
     * @param resourceType The resource type
     * @return the default file path for a resource type
     */
    private static String getDefaultResourceFileLocation(NodeType resourceType)
    {
        String resLocation;

        switch (resourceType)
        {
            case Color:
                resLocation = COLORS_FILE;
                break;
            case Dimen:
                resLocation = DIMENS_FILE;
                break;
            case Drawable:
                resLocation = DRAWABLES_FILE;
                break;
            case String:
                resLocation = STRINGS_FILE;
                break;
            default:
                resLocation = null;
        }

        return resLocation;
    }

    /**
     * Retrieves the ResourceFile object related to a resource file.
     * 
     * @param project The project that contains the resource file
     * @param resourceType The resource file type to be retrieved
     * @return the ResourceFile object related to the selected resource file type.
     * @throws CoreException
     * @throws AndroidException
     */
    public static ResourceFile getResourceFile(IProject project, NodeType resourceType)
            throws CoreException, AndroidException
    {
        Assert.isLegal(project != null);
        Assert.isLegal(resourceType != null);

        ResourceFile resourceFile = new ResourceFile();
        IFile resFile = (IFile) project.findMember(getDefaultResourceFileLocation(resourceType));

        if (resFile.exists())
        {
            IDocument document = FileUtil.readFile(resFile);
            resourceFile.parseDocument(document, getDefaultResourceFileLocation(resourceType));
        }

        return resourceFile;
    }

    /**
     * Saves a ResourceFile object to a resource file in a project
     * 
     * @param project The resource file project
     * @param resourceFile The resource file content (a ResourceFile object)
     * @param resourceType The resource type
     * @throws CoreException
     * @throws AndroidException
     */
    public static void saveResourceFile(IProject project, ResourceFile resourceFile,
            NodeType resourceType) throws CoreException, AndroidException
    {
        Assert.isLegal(project != null);
        Assert.isLegal(resourceFile != null);
        Assert.isLegal(resourceType != null);

        final String UTF8_ENCODING = "UTF-8";

        IFile resFile = (IFile) project.findMember(getDefaultResourceFileLocation(resourceType));

        FileUtil.saveFile(resFile, resourceFile.getContent(), UTF8_ENCODING, true);
    }
}