eclipse/plugins/com.android.ide.eclipse.tests/src/com/android/ide/eclipse/adt/internal/editors/layout/gle2/LayoutMetadataTest.java

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
 *
 * 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.android.ide.eclipse.adt.internal.editors.layout.gle2;

import static com.android.SdkConstants.ATTR_ID;
import static com.android.SdkConstants.ID_PREFIX;
import static com.android.SdkConstants.NEW_ID_PREFIX;
import static com.android.SdkConstants.TOOLS_PREFIX;
import static com.android.SdkConstants.TOOLS_URI;

import com.android.ide.common.layout.BaseLayoutRule;
import com.android.ide.eclipse.adt.AdtPlugin;
import com.android.ide.eclipse.adt.AdtUtils;
import com.android.ide.eclipse.adt.internal.editors.AndroidXmlEditor;
import com.android.ide.eclipse.adt.internal.editors.layout.refactoring.AdtProjectTest;
import com.android.ide.eclipse.adt.internal.editors.uimodel.UiElementNode;
import com.android.utils.Pair;
import com.android.utils.XmlUtils;

import org.eclipse.core.resources.IFile;
import org.eclipse.jface.text.IDocument;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.PartInitException;
import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 *
 */
@SuppressWarnings({"restriction", "javadoc", "deprecation"}) // XML DOM model
public class LayoutMetadataTest extends AdtProjectTest {

    public void testMetadata1() throws Exception {
        Pair<IDocument, UiElementNode> pair = getNode("metadata.xml", "listView1");
        UiElementNode uiNode = pair.getSecond();
        Node node = uiNode.getXmlNode();

        assertNull(LayoutMetadata.getProperty(node, "foo"));

        Element element = (Element) node;
        String prefix = XmlUtils.lookupNamespacePrefix(element, TOOLS_URI, null, false);
        if (prefix == null) {
            // Add in new prefix...
            prefix = XmlUtils.lookupNamespacePrefix(element,
                    TOOLS_URI, TOOLS_PREFIX, true);
        }
        element.setAttribute(prefix + ':' + "foo", "bar");
    }

    // ==== Test utilities ====

    private static String getText(IDocument document, Node node) throws Exception {
        IndexedRegion region = (IndexedRegion) node;
        // This often returns the wrong value:
        //int length = region.getLength();
        int length = region.getEndOffset() - region.getStartOffset();
        return document.get(region.getStartOffset(), length);
    }

    private Pair<IDocument, UiElementNode> getNode(String filename, String targetId)
            throws Exception, PartInitException {
        IFile file = getLayoutFile(getProject(), filename);
        AdtPlugin.openFile(file, null);
        IEditorPart newEditor = AdtUtils.getActiveEditor();
        assertTrue(newEditor instanceof AndroidXmlEditor);
        AndroidXmlEditor xmlEditor = (AndroidXmlEditor) newEditor;
        IStructuredDocument document = xmlEditor.getStructuredDocument();
        UiElementNode root = xmlEditor.getUiRootNode();
        assertNotNull(root);
        UiElementNode node = findById(root, targetId);
        assertNotNull(node);
        Pair<IDocument, UiElementNode> pair = Pair.<IDocument, UiElementNode>of(document, node);
        return pair;
    }

    private static UiElementNode findById(UiElementNode node, String targetId) {
        assertFalse(targetId.startsWith(NEW_ID_PREFIX));
        assertFalse(targetId.startsWith(ID_PREFIX));

        String id = node.getAttributeValue(ATTR_ID);
        if (id != null && targetId.equals(BaseLayoutRule.stripIdPrefix(id))) {
            return node;
        }

        for (UiElementNode child : node.getUiChildren()) {
            UiElementNode result = findById(child, targetId);
            if (result != null) {
                return result;
            }
        }

        return null;
    }
}