/*
 * 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;

import com.android.ide.eclipse.adt.internal.editors.layout.refactoring.AdtProjectTest;

import org.eclipse.core.resources.IFile;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;

@SuppressWarnings("restriction")
public class AndroidXmlCharacterMatcherTest extends AdtProjectTest {
    public void testGotoMatchingFwd1() throws Exception {
        checkGotoMatching(
                "<app^lication android:icon",
                "^</application>");
    }

    public void testGotoMatchingFwd2() throws Exception {
        checkGotoMatching(
                "^<application android:icon",
                "^</application>");
    }

    public void testGotoMatchingFwd3() throws Exception {
        checkGotoMatching(
                "<application^ android:icon",
                "^</application>");
    }

    public void testGotoMatchingBwd1() throws Exception {
        checkGotoMatching(
                "^</application>",
                "^<application android:icon");
    }

    public void testGotoMatchingBwd2() throws Exception {
        checkGotoMatching(
                "<^/application>",
                "^<application android:icon");
    }

    public void testGotoMatchingBwd3() throws Exception {
        checkGotoMatching(
                "</^application>",
                "^<application android:icon");
    }

    public void testGotoMatchingBwd4() throws Exception {
        checkGotoMatching(
                "</app^lication>",
                "^<application android:icon");
    }

    public void testGotoMatchingBwd5() throws Exception {
        checkGotoMatching(
                "</^application>",
                "^<application android:icon");
    }

    public void testGotoMatchingBwd6() throws Exception {
        checkGotoMatching(
                "</^application>",
                "^<application android:icon");
    }

    public void testGotoMatchingFwd4() throws Exception {
        checkGotoMatching(
                "<intent-filter^>",
                "^</intent-filter>");
    }

    public void testGotoMatchingFwd5() throws Exception {
        checkGotoMatching(
                "<intent-filter>^",
                "^</intent-filter>");
    }

    public void testGotoMatchingFallback() throws Exception {
        // Character matching is done by the superclass; ensure that fallback to the
        // other XML matchers is working
        checkGotoMatching(
                "android:icon=^\"@drawable/icon\"",
                "android:icon=\"@drawable/icon^\"");
    }

    private void checkGotoMatching(IFile file, String caretBefore,
            String caretAfter) throws Exception {
        IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
        assertNotNull(page);
        IEditorPart editor = IDE.openEditor(page, file);
        assertTrue(editor instanceof AndroidXmlEditor);
        AndroidXmlEditor layoutEditor = (AndroidXmlEditor) editor;
        ISourceViewer viewer = layoutEditor.getStructuredSourceViewer();

        int caretPosBefore = updateCaret(viewer, caretBefore);

        AndroidXmlCharacterMatcher matcher = new AndroidXmlCharacterMatcher();
        IStructuredDocument document = layoutEditor.getStructuredDocument();

        IRegion match = matcher.match(document, caretPosBefore);
        assertNotNull(match);

        String text = document.get();
        final String after = stripCaret(caretAfter);
        int index = text.indexOf(after);
        int caretPosAfter = match.getOffset() - index;
        String textWithCaret = after.substring(0, caretPosAfter)
                + "^" + after.substring(caretPosAfter);

        assertEquals(caretAfter, textWithCaret);
    }

    private static String stripCaret(String s) {
        int index = s.indexOf('^');
        assertTrue(index != -1);
        return s.substring(0, index) + s.substring(index + 1);
    }

    private void checkGotoMatching(String caretBefore,
            String caretAfter) throws Exception {
        checkGotoMatching(
                getTestDataFile(getProject(), "manifest.xml", "AndroidManifest.xml", true),
                caretBefore, caretAfter);
    }
}