michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko;
michael@0: 
michael@0: import org.mozilla.gecko.db.BrowserContract.Bookmarks;
michael@0: import org.mozilla.gecko.db.BrowserDB;
michael@0: import org.mozilla.gecko.util.ThreadUtils;
michael@0: import org.mozilla.gecko.util.UiAsyncTask;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.app.AlertDialog;
michael@0: import android.content.DialogInterface;
michael@0: import android.database.Cursor;
michael@0: import android.text.Editable;
michael@0: import android.text.TextWatcher;
michael@0: import android.view.LayoutInflater;
michael@0: import android.view.View;
michael@0: import android.widget.EditText;
michael@0: import android.widget.Toast;
michael@0: 
michael@0: /**
michael@0:  * A dialog that allows editing a bookmarks url, title, or keywords
michael@0:  * <p>
michael@0:  * Invoked by calling one of the {@link org.mozilla.gecko.EditBookmarkDialog.show}
michael@0:  * methods.
michael@0:  */
michael@0: public class EditBookmarkDialog {
michael@0:     private static final String LOGTAG = "GeckoEditBookmarkDialog";
michael@0:     private Context mContext;
michael@0: 
michael@0:     public EditBookmarkDialog(Context context) {
michael@0:         mContext = context;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * A private struct to make it easier to pass bookmark data across threads
michael@0:      */
michael@0:     private class Bookmark {
michael@0:         int id;
michael@0:         String title;
michael@0:         String url;
michael@0:         String keyword;
michael@0: 
michael@0:         public Bookmark(int aId, String aTitle, String aUrl, String aKeyword) {
michael@0:             id = aId;
michael@0:             title = aTitle;
michael@0:             url = aUrl;
michael@0:             keyword = aKeyword;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * This text watcher to enable or disable the OK button if the dialog contains
michael@0:      * valid information. This class is overridden to do data checking diffferent fields.
michael@0:      * By itself, it always enables the button.
michael@0:      *
michael@0:      * Callers can also assing a paired partner to the TextWatcher, and callers will check
michael@0:      * that both are enabled before enabling the ok button.
michael@0:      */
michael@0:     private class EditBookmarkTextWatcher implements TextWatcher {
michael@0:         // A stored reference to the dialog containing the text field being watched
michael@0:         protected AlertDialog mDialog;
michael@0: 
michael@0:         // A stored text watcher to do the real verification of a field
michael@0:         protected EditBookmarkTextWatcher mPairedTextWatcher;
michael@0: 
michael@0:         // Whether or not the ok button should be enabled.
michael@0:         protected boolean mEnabled = true;
michael@0: 
michael@0:         public EditBookmarkTextWatcher(AlertDialog aDialog) {
michael@0:             mDialog = aDialog;
michael@0:         }
michael@0: 
michael@0:         public void setPairedTextWatcher(EditBookmarkTextWatcher aTextWatcher) {
michael@0:             mPairedTextWatcher = aTextWatcher;
michael@0:         }
michael@0: 
michael@0:         public boolean isEnabled() {
michael@0:             return mEnabled;
michael@0:         }
michael@0: 
michael@0:         // Textwatcher interface
michael@0:         @Override
michael@0:         public void onTextChanged(CharSequence s, int start, int before, int count) {
michael@0:             // Disable if the we're disabled or the paired partner is disabled
michael@0:             boolean enabled = mEnabled && (mPairedTextWatcher == null || mPairedTextWatcher.isEnabled());
michael@0:             mDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(enabled);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void afterTextChanged(Editable s) {}
michael@0:         @Override
michael@0:         public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * A version of the EditBookmarkTextWatcher for the url field of the dialog.
michael@0:      * Only checks if the field is empty or not.
michael@0:      */
michael@0:     private class LocationTextWatcher extends EditBookmarkTextWatcher {
michael@0:         public LocationTextWatcher(AlertDialog aDialog) {
michael@0:             super(aDialog);
michael@0:         }
michael@0: 
michael@0:         // Disables the ok button if the location field is empty.
michael@0:         @Override
michael@0:         public void onTextChanged(CharSequence s, int start, int before, int count) {
michael@0:             mEnabled = (s.toString().trim().length() > 0);
michael@0:             super.onTextChanged(s, start, before, count);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * A version of the EditBookmarkTextWatcher for the keyword field of the dialog.
michael@0:      * Checks if the field has any (non leading or trailing) spaces.
michael@0:      */
michael@0:     private class KeywordTextWatcher extends EditBookmarkTextWatcher {
michael@0:         public KeywordTextWatcher(AlertDialog aDialog) {
michael@0:             super(aDialog);
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public void onTextChanged(CharSequence s, int start, int before, int count) {
michael@0:             // Disable if the keyword contains spaces
michael@0:             mEnabled = (s.toString().trim().indexOf(' ') == -1);
michael@0:             super.onTextChanged(s, start, before, count);
michael@0:        }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Show the Edit bookmark dialog for a particular url. If the url is bookmarked multiple times
michael@0:      * this will just edit the first instance it finds.
michael@0:      *
michael@0:      * @param url The url of the bookmark to edit. The dialog will look up other information like the id,
michael@0:      *            current title, or keywords associated with this url. If the url isn't bookmarked, the
michael@0:      *            dialog will fail silently. If the url is bookmarked multiple times, this will only show
michael@0:      *            information about the first it finds.
michael@0:      */
michael@0:     public void show(final String url) {
michael@0:         (new UiAsyncTask<Void, Void, Bookmark>(ThreadUtils.getBackgroundHandler()) {
michael@0:             @Override
michael@0:             public Bookmark doInBackground(Void... params) {
michael@0:                 Cursor cursor = BrowserDB.getBookmarkForUrl(mContext.getContentResolver(), url);
michael@0:                 if (cursor == null) {
michael@0:                     return null;
michael@0:                 }
michael@0: 
michael@0:                 Bookmark bookmark = null;
michael@0:                 try {
michael@0:                     cursor.moveToFirst();
michael@0:                     bookmark = new Bookmark(cursor.getInt(cursor.getColumnIndexOrThrow(Bookmarks._ID)),
michael@0:                                                           cursor.getString(cursor.getColumnIndexOrThrow(Bookmarks.TITLE)),
michael@0:                                                           cursor.getString(cursor.getColumnIndexOrThrow(Bookmarks.URL)),
michael@0:                                                           cursor.getString(cursor.getColumnIndexOrThrow(Bookmarks.KEYWORD)));
michael@0:                 } finally {
michael@0:                     cursor.close();
michael@0:                 }
michael@0:                 return bookmark;
michael@0:             }
michael@0: 
michael@0:             @Override
michael@0:             public void onPostExecute(Bookmark bookmark) {
michael@0:                 if (bookmark == null)
michael@0:                     return;
michael@0: 
michael@0:                 show(bookmark.id, bookmark.title, bookmark.url, bookmark.keyword);
michael@0:             }
michael@0:         }).execute();
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Show the Edit bookmark dialog for a set of data. This will show the dialog whether
michael@0:      * a bookmark with this url exists or not, but the results will NOT be saved if the id
michael@0:      * is not a valid bookmark id.
michael@0:      *
michael@0:      * @param id The id of the bookmark to change. If there is no bookmark with this ID, the dialog
michael@0:      *           will fail silently.
michael@0:      * @param title The initial title to show in the dialog
michael@0:      * @param url The initial url to show in the dialog
michael@0:      * @param keyword The initial keyword to show in the dialog
michael@0:      */
michael@0:     public void show(final int id, final String title, final String url, final String keyword) {
michael@0:         AlertDialog.Builder editPrompt = new AlertDialog.Builder(mContext);
michael@0:         final View editView = LayoutInflater.from(mContext).inflate(R.layout.bookmark_edit, null);
michael@0:         editPrompt.setTitle(R.string.bookmark_edit_title);
michael@0:         editPrompt.setView(editView);
michael@0: 
michael@0:         final EditText nameText = ((EditText) editView.findViewById(R.id.edit_bookmark_name));
michael@0:         final EditText locationText = ((EditText) editView.findViewById(R.id.edit_bookmark_location));
michael@0:         final EditText keywordText = ((EditText) editView.findViewById(R.id.edit_bookmark_keyword));
michael@0:         nameText.setText(title);
michael@0:         locationText.setText(url);
michael@0:         keywordText.setText(keyword);
michael@0: 
michael@0:         editPrompt.setPositiveButton(R.string.button_ok, new DialogInterface.OnClickListener() {
michael@0:             @Override
michael@0:             public void onClick(DialogInterface dialog, int whichButton) {
michael@0:                 (new UiAsyncTask<Void, Void, Void>(ThreadUtils.getBackgroundHandler()) {
michael@0:                     @Override
michael@0:                     public Void doInBackground(Void... params) {
michael@0:                         String newUrl = locationText.getText().toString().trim();
michael@0:                         String newKeyword = keywordText.getText().toString().trim();
michael@0:                         BrowserDB.updateBookmark(mContext.getContentResolver(), id, newUrl, nameText.getText().toString(), newKeyword);
michael@0:                         return null;
michael@0:                     }
michael@0: 
michael@0:                     @Override
michael@0:                     public void onPostExecute(Void result) {
michael@0:                         Toast.makeText(mContext, R.string.bookmark_updated, Toast.LENGTH_SHORT).show();
michael@0:                     }
michael@0:                 }).execute();
michael@0:             }
michael@0:         });
michael@0: 
michael@0:         editPrompt.setNegativeButton(R.string.button_cancel, new DialogInterface.OnClickListener() {
michael@0:             @Override
michael@0:             public void onClick(DialogInterface dialog, int whichButton) {
michael@0:                   // do nothing
michael@0:               }
michael@0:         });
michael@0: 
michael@0:         final AlertDialog dialog = editPrompt.create();
michael@0: 
michael@0:         // Create our TextWatchers
michael@0:         LocationTextWatcher locationTextWatcher = new LocationTextWatcher(dialog);
michael@0:         KeywordTextWatcher keywordTextWatcher = new KeywordTextWatcher(dialog);
michael@0: 
michael@0:         // Cross reference the TextWatchers
michael@0:         locationTextWatcher.setPairedTextWatcher(keywordTextWatcher);
michael@0:         keywordTextWatcher.setPairedTextWatcher(locationTextWatcher);
michael@0: 
michael@0:         // Add the TextWatcher Listeners
michael@0:         locationText.addTextChangedListener(locationTextWatcher);
michael@0:         keywordText.addTextChangedListener(keywordTextWatcher);
michael@0: 
michael@0:         dialog.show();
michael@0:     }
michael@0: }