src/com/android/browser/AddBookmarkPage.java

/*
 * Copyright (C) 2006 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.android.browser;

import android.app.Activity;
import android.app.LoaderManager;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Intent;
import android.content.Loader;
import android.content.res.Resources;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.ParseException;
import android.net.WebAddress;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.BrowserContract;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.CursorAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Date;

import android.util.Log;

public class AddBookmarkPage extends Activity
        implements View.OnClickListener, TextView.OnEditorActionListener,
        AdapterView.OnItemClickListener, LoaderManager.LoaderCallbacks<Cursor> {

    private final String LOGTAG = "Bookmarks";

    // IDs for the CursorLoaders that are used.
    private final int LOADER_ID_FOLDER_CONTENTS = 0;
    private final int LOADER_ID_ALL_FOLDERS = 1;

    private EditText    mTitle;
    private EditText    mAddress;
    private TextView    mButton;
    private View        mCancelButton;
    private boolean     mEditingExisting;
    private Bundle      mMap;
    private String      mTouchIconUrl;
    private Bitmap      mThumbnail;
    private String      mOriginalUrl;
    private TextView mFolder;
    private View mDefaultView;
    private View mFolderSelector;
    private EditText mFolderNamer;
    private View mAddNewFolder;
    private long mCurrentFolder = 0;
    private FolderAdapter mAdapter;
    private ArrayList<Folder> mPaths;
    private TextView    mPath;

    private static class Folder {
        String Name;
        long Id;
        Folder(String name, long id) {
            Name = name;
            Id = id;
        }
    }

    // Message IDs
    private static final int SAVE_BOOKMARK = 100;

    private Handler mHandler;

    @Override
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
        if (v == mFolderNamer) {
            if (v.getText().length() > 0) {
                if (actionId == EditorInfo.IME_NULL) {
                    // Only want to do this once.
                    if (event.getAction() == KeyEvent.ACTION_UP) {
                        // Add the folder to the database
                        ContentValues values = new ContentValues();
                        values.put(BrowserContract.Bookmarks.TITLE,
                                v.getText().toString());
                        values.put(BrowserContract.Bookmarks.IS_FOLDER, 1);
                        values.put(BrowserContract.Bookmarks.PARENT,
                                mCurrentFolder);
                        getContentResolver().insert(
                                BrowserContract.Bookmarks.CONTENT_URI, values);

                        mFolderNamer.setVisibility(View.GONE);
                        InputMethodManager.getInstance(this)
                                .hideSoftInputFromWindow(
                                mFolderNamer.getWindowToken(), 0);
                    }
                    // Steal the key press for both up and down
                    return true;
                }
            }
        }
        return false;
    }

    @Override
    public void onClick(View v) {
        if (v == mButton) {
            if (mFolderSelector.getVisibility() == View.VISIBLE) {
                // We are showing the folder selector.  This means that the user
                // has selected a folder.  Go back to the opening page
                mFolderSelector.setVisibility(View.GONE);
                mDefaultView.setVisibility(View.VISIBLE);
                setTitle(R.string.bookmark_this_page);
            } else if (save()) {
                finish();
            }
        } else if (v == mCancelButton) {
            finish();
        } else if (v == mFolder) {
            switchToFolderSelector();
        } else if (v == mAddNewFolder) {
            mFolderNamer.setVisibility(View.VISIBLE);
            mFolderNamer.setText(R.string.new_folder);
            mFolderNamer.requestFocus();
            InputMethodManager.getInstance(this).showSoftInput(mFolderNamer,
                    InputMethodManager.SHOW_IMPLICIT);
        }
    }

    private void switchToFolderSelector() {
        mDefaultView.setVisibility(View.GONE);
        mFolderSelector.setVisibility(View.VISIBLE);
        setTitle(R.string.containing_folder);
    }

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        String[] projection;
        switch (id) {
            case LOADER_ID_ALL_FOLDERS:
                projection = new String[] {
                        BrowserContract.Bookmarks._ID,
                        BrowserContract.Bookmarks.PARENT,
                        BrowserContract.Bookmarks.TITLE,
                        BrowserContract.Bookmarks.IS_FOLDER
                };
                return new CursorLoader(this,
                        BrowserContract.Bookmarks.CONTENT_URI,
                        projection,
                        BrowserContract.Bookmarks.IS_FOLDER + " != 0",
                        null,
                        null);
            case LOADER_ID_FOLDER_CONTENTS:
                projection = new String[] {
                        BrowserContract.Bookmarks._ID,
                        BrowserContract.Bookmarks.TITLE,
                        BrowserContract.Bookmarks.IS_FOLDER
                };

                return new CursorLoader(this,
                        BrowserContract.Bookmarks.buildFolderUri(
                        mCurrentFolder),
                        projection,
                        BrowserContract.Bookmarks.IS_FOLDER + " != 0",
                        null,
                        null);
            default:
                throw new AssertionError("Asking for nonexistant loader!");
        }
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
        switch (loader.getId()) {
            case LOADER_ID_FOLDER_CONTENTS:
                mAdapter.changeCursor(cursor);
                break;
            case LOADER_ID_ALL_FOLDERS:
                long parent = mCurrentFolder;
                int idIndex = cursor.getColumnIndexOrThrow(
                        BrowserContract.Bookmarks._ID);
                int titleIndex = cursor.getColumnIndexOrThrow(
                        BrowserContract.Bookmarks.TITLE);
                int parentIndex = cursor.getColumnIndexOrThrow(
                        BrowserContract.Bookmarks.PARENT);
                while (parent != 0) {
                    // First, find the folder corresponding to the current
                    // folder
                    if (!cursor.moveToFirst()) {
                        throw new AssertionError("No folders in the database!");
                    }
                    long folder;
                    do {
                        folder = cursor.getLong(idIndex);
                    } while (folder != parent && cursor.moveToNext());
                    if (cursor.isAfterLast()) {
                        throw new AssertionError("Folder(id=" + parent
                                + ") holding this bookmark does not exist!");
                    }
                    String name = cursor.getString(titleIndex);
                    mPaths.add(1, new Folder(name, parent));
                    parent = cursor.getLong(parentIndex);
                }
                getLoaderManager().stopLoader(LOADER_ID_ALL_FOLDERS);
                updatePathString();
                break;
            default:
                break;
        }
    }

    /**
     * Update the TextViews in both modes to display the full path of the
     * current location to insert.
     */
    private void updatePathString() {
        String path = mPaths.get(0).Name;
        int size = mPaths.size();
        for (int i = 1; i < size; i++) {
            path += " / " + mPaths.get(i).Name;
        }
        mPath.setText(path);
        mFolder.setText(path);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        // Switch to the folder that was clicked on.
        mCurrentFolder = id;
        mPaths.add(new Folder(((TextView) view).getText().toString(), id));
        updatePathString();

        getLoaderManager().restartLoader(LOADER_ID_FOLDER_CONTENTS, null, this);
    }

    /**
     * Shows a list of names of folders.
     */
    private class FolderAdapter extends CursorAdapter {
        public FolderAdapter(Context context) {
            super(context, null);
        }

        @Override
        public void bindView(View view, Context context, Cursor cursor) {
            ((TextView) view.findViewById(android.R.id.text1)).setText(
                    cursor.getString(cursor.getColumnIndexOrThrow(
                    BrowserContract.Bookmarks.TITLE)));
        }

        @Override
        public View newView(Context context, Cursor cursor, ViewGroup parent) {
            return LayoutInflater.from(context).inflate(
                    android.R.layout.simple_list_item_1, null);
        }
    }

    protected void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        requestWindowFeature(Window.FEATURE_LEFT_ICON);

        mMap = getIntent().getExtras();

        setContentView(R.layout.browser_add_bookmark);

        setTitle(R.string.bookmark_this_page);
        getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON, R.drawable.ic_list_bookmark);
        
        String title = null;
        String url = null;

        if (mMap != null) {
            Bundle b = mMap.getBundle("bookmark");
            if (b != null) {
                mMap = b;
                mEditingExisting = true;
                setTitle(R.string.edit_bookmark);
            }
            title = mMap.getString("title");
            url = mOriginalUrl = mMap.getString("url");
            mTouchIconUrl = mMap.getString("touch_icon_url");
            mThumbnail = (Bitmap) mMap.getParcelable("thumbnail");
            mCurrentFolder = mMap.getLong(BrowserContract.Bookmarks.PARENT);
        }

        mTitle = (EditText) findViewById(R.id.title);
        mTitle.setText(title);

        mAddress = (EditText) findViewById(R.id.address);
        mAddress.setText(url);

        mButton = (TextView) findViewById(R.id.OK);
        mButton.setOnClickListener(this);

        mCancelButton = findViewById(R.id.cancel);
        mCancelButton.setOnClickListener(this);

        mFolder = (TextView) findViewById(R.id.folder);
        mFolder.setOnClickListener(this);

        mDefaultView = findViewById(R.id.default_view);
        mFolderSelector = findViewById(R.id.folder_selector);

        mFolderNamer = (EditText) findViewById(R.id.folder_namer);
        mFolderNamer.setOnEditorActionListener(this);

        mAddNewFolder = findViewById(R.id.add_new_folder);
        mAddNewFolder.setOnClickListener(this);

        mPath = (TextView) findViewById(R.id.path);
                ListView list = (ListView) findViewById(R.id.list);

        mPaths = new ArrayList<Folder>();
        mPaths.add(0, new Folder(getString(R.string.bookmarks), 0));
        mAdapter = new FolderAdapter(this);
        list.setAdapter(mAdapter);
        list.setOnItemClickListener(this);
        LoaderManager manager = getLoaderManager();
        if (mCurrentFolder != 0) {
            // Find all the folders
            manager.initLoader(LOADER_ID_ALL_FOLDERS, null, this);
        }
        manager.initLoader(LOADER_ID_FOLDER_CONTENTS, null, this);

        
        if (!getWindow().getDecorView().isInTouchMode()) {
            mButton.requestFocus();
        }
    }

    @Override
    public boolean dispatchKeyEvent (KeyEvent event) {
        if (mFolderSelector.getVisibility() == View.VISIBLE
                && KeyEvent.KEYCODE_BACK == event.getKeyCode()) {
            if (KeyEvent.ACTION_UP == event.getAction()) {
                int size = mPaths.size();
                if (1 == size) {
                    // We have reached the top level
                    finish();
                } else {
                    // Go up a level
                    mPaths.remove(size - 1);
                    mCurrentFolder = mPaths.get(size - 2).Id;
                    updatePathString();
                    getLoaderManager().restartLoader(LOADER_ID_FOLDER_CONTENTS,
                            null, this);
                }
            }
            return true;
        }
        return super.dispatchKeyEvent(event);
    }

    /**
     * Runnable to save a bookmark, so it can be performed in its own thread.
     */
    private class SaveBookmarkRunnable implements Runnable {
        // FIXME: This should be an async task.
        private Message mMessage;
        public SaveBookmarkRunnable(Message msg) {
            mMessage = msg;
        }
        public void run() {
            // Unbundle bookmark data.
            Bundle bundle = mMessage.getData();
            String title = bundle.getString("title");
            String url = bundle.getString("url");
            boolean invalidateThumbnail = bundle.getBoolean(
                    "invalidateThumbnail");
            Bitmap thumbnail = invalidateThumbnail ? null
                    : (Bitmap) bundle.getParcelable("thumbnail");
            String touchIconUrl = bundle.getString("touchIconUrl");

            // Save to the bookmarks DB.
            try {
                final ContentResolver cr = getContentResolver();
                Bookmarks.addBookmark(AddBookmarkPage.this, false, url,
                        title, thumbnail, true, mCurrentFolder);
                if (touchIconUrl != null) {
                    new DownloadTouchIcon(AddBookmarkPage.this, cr, url).execute(mTouchIconUrl);
                }
                mMessage.arg1 = 1;
            } catch (IllegalStateException e) {
                mMessage.arg1 = 0;
            }
            mMessage.sendToTarget();
        }
    }

    private void createHandler() {
        if (mHandler == null) {
            mHandler = new Handler() {
                @Override
                public void handleMessage(Message msg) {
                    switch (msg.what) {
                        case SAVE_BOOKMARK:
                            if (1 == msg.arg1) {
                                Toast.makeText(AddBookmarkPage.this, R.string.bookmark_saved,
                                        Toast.LENGTH_LONG).show();
                            } else {
                                Toast.makeText(AddBookmarkPage.this, R.string.bookmark_not_saved,
                                        Toast.LENGTH_LONG).show();
                            }
                            break;
                    }
                }
            };
        }
    }

    /**
     * Parse the data entered in the dialog and post a message to update the bookmarks database.
     */
    boolean save() {
        createHandler();

        String title = mTitle.getText().toString().trim();
        String unfilteredUrl;
        unfilteredUrl = BrowserActivity.fixUrl(mAddress.getText().toString());

        boolean emptyTitle = title.length() == 0;
        boolean emptyUrl = unfilteredUrl.trim().length() == 0;
        Resources r = getResources();
        if (emptyTitle || emptyUrl) {
            if (emptyTitle) {
                mTitle.setError(r.getText(R.string.bookmark_needs_title));
            }
            if (emptyUrl) {
                mAddress.setError(r.getText(R.string.bookmark_needs_url));
            }
            return false;

        }
        String url = unfilteredUrl.trim();
        try {
            // We allow bookmarks with a javascript: scheme, but these will in most cases
            // fail URI parsing, so don't try it if that's the kind of bookmark we have.

            if (!url.toLowerCase().startsWith("javascript:")) {
                URI uriObj = new URI(url);
                String scheme = uriObj.getScheme();
                if (!Bookmarks.urlHasAcceptableScheme(url)) {
                    // If the scheme was non-null, let the user know that we
                    // can't save their bookmark. If it was null, we'll assume
                    // they meant http when we parse it in the WebAddress class.
                    if (scheme != null) {
                        mAddress.setError(r.getText(R.string.bookmark_cannot_save_url));
                        return false;
                    }
                    WebAddress address;
                    try {
                        address = new WebAddress(unfilteredUrl);
                    } catch (ParseException e) {
                        throw new URISyntaxException("", "");
                    }
                    if (address.mHost.length() == 0) {
                        throw new URISyntaxException("", "");
                    }
                    url = address.toString();
                }
            }
        } catch (URISyntaxException e) {
            mAddress.setError(r.getText(R.string.bookmark_url_not_valid));
            return false;
        }

        if (mEditingExisting) {
            mMap.putString("title", title);
            mMap.putString("url", url);
            mMap.putBoolean("invalidateThumbnail", !url.equals(mOriginalUrl));
            // FIXME: This does not work yet
            mMap.putLong(BrowserContract.Bookmarks.PARENT, mCurrentFolder);
            setResult(RESULT_OK, (new Intent()).setAction(
                    getIntent().toString()).putExtras(mMap));
        } else {
            // Post a message to write to the DB.
            Bundle bundle = new Bundle();
            bundle.putString("title", title);
            bundle.putString("url", url);
            bundle.putParcelable("thumbnail", mThumbnail);
            bundle.putBoolean("invalidateThumbnail", !url.equals(mOriginalUrl));
            bundle.putString("touchIconUrl", mTouchIconUrl);
            Message msg = Message.obtain(mHandler, SAVE_BOOKMARK);
            msg.setData(bundle);
            // Start a new thread so as to not slow down the UI
            Thread t = new Thread(new SaveBookmarkRunnable(msg));
            t.start();
            setResult(RESULT_OK);
            LogTag.logBookmarkAdded(url, "bookmarkview");
        }
        return true;
    }
}