Android Open Source - webview-gm Web View Gm Impl

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License

The source code is released under:

Apache License

Java Source Code

/*
 *    Copyright 2012 Werner Bayer//  ww w  . j  a  va 2s.  com
 *
 *    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 at.pardus.android.webview.gm;

import java.util.EmptyStackException;
import java.util.Stack;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
import at.pardus.android.webview.gm.model.ScriptId;
import at.pardus.android.webview.gm.store.ScriptStoreSQLite;
import at.pardus.android.webview.gm.store.ui.ScriptBrowser;
import at.pardus.android.webview.gm.store.ui.ScriptEditor;
import at.pardus.android.webview.gm.store.ui.ScriptList;
import at.pardus.android.webview.gm.store.ui.ScriptManagerActivity;
import at.pardus.webview.gm.R;

/**
 * Implements all parts of the WebView GM library.
 */
public class WebViewGmImpl extends ScriptManagerActivity {

  private Stack<Integer> placeHistory = new Stack<Integer>();

  private SharedPreferences preferences;

  private static final Integer LIST = 1;

  private static final Integer BROWSER = 2;

  @Override
  public void openScriptList() {
    if (scriptList == null) {
      if (scriptStore == null) {
        scriptStore = new ScriptStoreSQLite(this);
        scriptStore.open();
      }
      scriptList = new ScriptList(this, scriptStore);
    }
    setTitle(R.string.webviewgm_impl_app_name);
    setContentView(scriptList.getScriptList());
    placeHistory.push(LIST);
  }

  @Override
  public void openScriptEditor(ScriptId scriptId) {
    if (scriptEditor == null) {
      if (scriptStore == null) {
        scriptStore = new ScriptStoreSQLite(this);
        scriptStore.open();
      }
      scriptEditor = new ScriptEditor(this, scriptStore);
    }
    setContentView(scriptEditor.getEditForm(scriptId));
    placeHistory.push(null);
  }

  @Override
  public void openScriptBrowser() {
    if (scriptBrowser == null) {
      if (scriptStore == null) {
        scriptStore = new ScriptStoreSQLite(this);
        scriptStore.open();
      }
      scriptBrowser = new ScriptBrowser(this, scriptStore,
          preferences.getString("lastUrl", "http://userscripts.org/"));
    }
    setContentView(scriptBrowser.getBrowser());
    placeHistory.push(BROWSER);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.impl_menu, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == R.id.menu_browse) {
      openScriptBrowser();
      return true;
    } else if (item.getItemId() == R.id.menu_list) {
      openScriptList();
      return true;
    } else {
      return super.onOptionsItemSelected(item);
    }
  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_PROGRESS);
    preferences = getSharedPreferences("P", Context.MODE_PRIVATE);
    openScriptBrowser();
  }

  @Override
  protected void onResume() {
    if (scriptStore != null) {
      scriptStore.open();
    }
    if (scriptBrowser != null) {
      scriptBrowser.resume();
    }
    super.onResume();
  }

  @Override
  protected void onPause() {
    if (scriptBrowser != null) {
      SharedPreferences.Editor editor = preferences.edit();
      editor.putString("lastUrl", scriptBrowser.getUrl());
      editor.commit();
      scriptBrowser.pause();
    }
    if (scriptStore != null) {
      scriptStore.close();
    }
    super.onPause();
  }

  @Override
  public void onBackPressed() {
    try {
      Integer thisPlace = placeHistory.pop();
      if (BROWSER.equals(thisPlace) && scriptBrowser.back()) {
        placeHistory.push(thisPlace);
      } else {
        while (true) {
          Integer prevPlace = placeHistory.pop();
          if (prevPlace == null || prevPlace.equals(thisPlace)) {
            continue;
          }
          if (LIST.equals(prevPlace)) {
            openScriptList();
            return;
          }
          if (BROWSER.equals(prevPlace)) {
            openScriptBrowser();
            return;
          }
        }
      }
    } catch (EmptyStackException e) {
      super.onBackPressed();
    }
  }

}

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