src/com/android/mail/ui/ConversationViewFragment.java - platform/packages/apps/UnifiedEmail - Gitiles

 /*
  * Copyright (C) 2012 Google Inc.
  * Licensed to 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.mail.ui;

 import com.google.common.collect.Maps;

 import android.app.Activity;
 import android.app.Fragment;
 import android.app.LoaderManager;
 import android.content.Context;
 import android.content.CursorLoader;
 import android.content.Loader;
 import android.database.Cursor;
 import android.database.CursorWrapper;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
 import android.webkit.ConsoleMessage;
 import android.webkit.WebChromeClient;
 import android.webkit.WebSettings;
 import android.widget.Adapter;
 import android.widget.ResourceCursorAdapter;
 import android.widget.TextView;

 import com.android.mail.FormattedDateBuilder;
 import com.android.mail.R;
 import com.android.mail.browse.MessageHeaderView;
 import com.android.mail.providers.Account;
 import com.android.mail.providers.Conversation;
 import com.android.mail.providers.Message;
 import com.android.mail.providers.UIProvider;
 import com.android.mail.utils.LogUtils;

 import java.util.Map;

 /**
  * The conversation view UI component.
  */
 public final class ConversationViewFragment extends Fragment implements
         LoaderManager.LoaderCallbacks<Cursor> {

     private static final String LOG_TAG = new LogUtils().getLogTag();

     private static final int MESSAGE_LOADER_ID = 0;

     private ControllableActivity mActivity;

     private Context mContext;

     private Conversation mConversation;

     private TextView mSubject;

     private ConversationContainer mConversationContainer;

     private Account mAccount;

     private ConversationWebView mWebView;

     private HtmlConversationTemplates mTemplates;

     private String mBaseUri;

     private final Handler mHandler = new Handler();

     private final MailJsBridge mJsBridge = new MailJsBridge();

     private static final String ARG_ACCOUNT = "account";
     private static final String ARG_CONVERSATION = "conversation";

     /**
      * Constructor needs to be public to handle orientation changes and activity lifecycle events.
      */
     public ConversationViewFragment() {
         super();
     }

     /**
      * Creates a new instance of {@link ConversationViewFragment}, initialized
      * to display conversation.
      */
     public static ConversationViewFragment newInstance(Account account,
             Conversation conversation) {
        ConversationViewFragment f = new ConversationViewFragment();
        Bundle args = new Bundle();
        args.putParcelable(ARG_ACCOUNT, account);
        args.putParcelable(ARG_CONVERSATION, conversation);
        f.setArguments(args);
        return f;
     }

     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
         // Strictly speaking, we get back an android.app.Activity from getActivity. However, the
         // only activity creating a ConversationListContext is a MailActivity which is of type
         // ControllableActivity, so this cast should be safe. If this cast fails, some other
         // activity is creating ConversationListFragments. This activity must be of type
         // ControllableActivity.
         final Activity activity = getActivity();
         if (! (activity instanceof ControllableActivity)){
             LogUtils.wtf(LOG_TAG, "ConversationViewFragment expects only a ControllableActivity to"
                     + "create it. Cannot proceed.");
         }
         mActivity = (ControllableActivity) activity;
         mContext = mActivity.getApplicationContext();
         if (mActivity.isFinishing()) {
             // Activity is finishing, just bail.
             return;
         }
         mActivity.attachConversationView(this);
         mTemplates = new HtmlConversationTemplates(mContext);
         // Show conversation and start loading messages.
         showConversation();
     }

     @Override
     public void onCreate(Bundle savedState) {
         LogUtils.v(LOG_TAG, "onCreate in FolderListFragment(this=%s)", this);
         super.onCreate(savedState);

         Bundle args = getArguments();
         mAccount = args.getParcelable(ARG_ACCOUNT);
         mConversation = args.getParcelable(ARG_CONVERSATION);
         mBaseUri = "x-thread://" + mAccount.name + "/" + mConversation.id;
     }

     @Override
     public View onCreateView(LayoutInflater inflater,
             ViewGroup container, Bundle savedInstanceState) {
         View rootView = inflater.inflate(R.layout.conversation_view, null);
         mSubject = (TextView) rootView.findViewById(R.id.subject);
         mConversationContainer = (ConversationContainer) rootView
                 .findViewById(R.id.conversation_container);
         mWebView = (ConversationWebView) rootView.findViewById(R.id.webview);

         mWebView.addJavascriptInterface(mJsBridge, "mail");

         mWebView.setWebChromeClient(new WebChromeClient() {
             @Override
             public boolean onConsoleMessage(ConsoleMessage consoleMessage) {
                 LogUtils.i(LOG_TAG, "JS: %s (%s:%d)", consoleMessage.message(),
                         consoleMessage.sourceId(), consoleMessage.lineNumber());
                 return true;
             }
         });

         WebSettings settings = mWebView.getSettings();

         settings.setBlockNetworkImage(true);

         settings.setJavaScriptEnabled(true);
         settings.setUseWideViewPort(true);

         settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NORMAL);

         settings.setSupportZoom(true);
         settings.setBuiltInZoomControls(true);
         settings.setDisplayZoomControls(false);

         return rootView;
     }

     @Override
     public void onDestroyView() {
         // Clear the adapter.
         mConversationContainer.setOverlayAdapter(null);
         mActivity.attachConversationView(null);

         super.onDestroyView();
     }

     /**
      * Handles a request to show a new conversation list, either from a search query or for viewing
      * a folder. This will initiate a data load, and hence must be called on the UI thread.
      */
     private void showConversation() {
         mSubject.setText(mConversation.subject);
         getLoaderManager().initLoader(MESSAGE_LOADER_ID, Bundle.EMPTY, this);
     }

     @Override
     public Loader<Cursor> onCreateLoader(int id, Bundle args) {
         return new MessageLoader(mContext, mConversation.messageListUri);
     }

     @Override
     public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
         MessageCursor messageCursor = (MessageCursor) data;
         mWebView.loadDataWithBaseURL(mBaseUri, renderMessageBodies(messageCursor), "text/html",
                 "utf-8", null);
         final Adapter messageListAdapter = new MessageListAdapter(
                 mActivity.getActivityContext(), messageCursor, mAccount, getLoaderManager());
         mConversationContainer.setOverlayAdapter(messageListAdapter);
     }

     @Override
     public void onLoaderReset(Loader<Cursor> loader) {
         // Do nothing.
     }

     private String renderMessageBodies(MessageCursor messageCursor) {
         int pos = -1;
         mTemplates.startConversation(0);
         while (messageCursor.moveToPosition(++pos)) {
             mTemplates.appendMessageHtml(messageCursor.get(), true, false, 1.0f, 96);
         }
         return mTemplates.endConversation(mBaseUri, 320);
     }

     public void onTouchEvent(MotionEvent event) {
         // TODO: (mindyp) when there is an undo bar, check for event !in undo bar
         // if its not in undo bar, dismiss the undo bar.
     }

     private static class MessageLoader extends CursorLoader {

         public MessageLoader(Context c, Uri uri) {
             super(c, uri, UIProvider.MESSAGE_PROJECTION, null, null, null);
         }

         @Override
         public Cursor loadInBackground() {
             return new MessageCursor(super.loadInBackground());

         }
     }

     private static class MessageCursor extends CursorWrapper {

         private Map<Long, Message> mCache = Maps.newHashMap();

         public MessageCursor(Cursor inner) {
             super(inner);
         }

         public Message get() {
             long id = getWrappedCursor().getLong(0);
             Message m = mCache.get(id);
             if (m == null) {
                 m = new Message(this);
                 mCache.put(id, m);
             }
             return m;
         }
     }

     private static class MessageListAdapter extends ResourceCursorAdapter {

         private final FormattedDateBuilder mDateBuilder;
         private final Account mAccount;
         private final LoaderManager mLoaderManager;

         public MessageListAdapter(Context context, Cursor messageCursor, Account account,
                 LoaderManager loaderManager) {
             super(context, R.layout.conversation_message_header, messageCursor, 0);
             mDateBuilder = new FormattedDateBuilder(context);
             mAccount = account;
             mLoaderManager = loaderManager;
         }

         @Override
         public void bindView(View view, Context context, Cursor cursor) {
             Message m = ((MessageCursor) cursor).get();
             MessageHeaderView header = (MessageHeaderView) view;
             header.initialize(mDateBuilder, mAccount, mLoaderManager, true, false, false);
             header.bind(m);
         }
     }

     /**
      * NOTE: all public methods must be listed in the proguard flags so that they can be accessed
      * via reflection and not stripped.
      *
      */
     private class MailJsBridge {

         @SuppressWarnings("unused")
         public void onWebContentGeometryChange(final String[] headerBottomStrs) {
             mHandler.post(new Runnable() {
                 @Override
                 public void run() {
                     final int len = headerBottomStrs.length;
                     final int[] headerBottoms = new int[len];
                     for (int i = 0; i < len; i++) {
                         headerBottoms[i] = Integer.parseInt(headerBottomStrs[i]);
                     }
                     mConversationContainer.onGeometryChange(headerBottoms);
                 }
             });
         }

     }

 }
	/*
	* Copyright (C) 2012 Google Inc.
	* Licensed to 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.mail.ui;

	import com.google.common.collect.Maps;

	import android.app.Activity;
	import android.app.Fragment;
	import android.app.LoaderManager;
	import android.content.Context;
	import android.content.CursorLoader;
	import android.content.Loader;
	import android.database.Cursor;
	import android.database.CursorWrapper;
	import android.net.Uri;
	import android.os.Bundle;
	import android.os.Handler;
	import android.view.LayoutInflater;
	import android.view.MotionEvent;
	import android.view.View;
	import android.view.ViewGroup;
	import android.webkit.ConsoleMessage;
	import android.webkit.WebChromeClient;
	import android.webkit.WebSettings;
	import android.widget.Adapter;
	import android.widget.ResourceCursorAdapter;
	import android.widget.TextView;

	import com.android.mail.FormattedDateBuilder;
	import com.android.mail.R;
	import com.android.mail.browse.MessageHeaderView;
	import com.android.mail.providers.Account;
	import com.android.mail.providers.Conversation;
	import com.android.mail.providers.Message;
	import com.android.mail.providers.UIProvider;
	import com.android.mail.utils.LogUtils;

	import java.util.Map;

	/**
	* The conversation view UI component.
	*/
	public final class ConversationViewFragment extends Fragment implements
	LoaderManager.LoaderCallbacks<Cursor> {

	private static final String LOG_TAG = new LogUtils().getLogTag();

	private static final int MESSAGE_LOADER_ID = 0;

	private ControllableActivity mActivity;

	private Context mContext;

	private Conversation mConversation;

	private TextView mSubject;

	private ConversationContainer mConversationContainer;

	private Account mAccount;

	private ConversationWebView mWebView;

	private HtmlConversationTemplates mTemplates;

	private String mBaseUri;

	private final Handler mHandler = new Handler();

	private final MailJsBridge mJsBridge = new MailJsBridge();

	private static final String ARG_ACCOUNT = "account";
	private static final String ARG_CONVERSATION = "conversation";

	/**
	* Constructor needs to be public to handle orientation changes and activity lifecycle events.
	*/
	public ConversationViewFragment() {
	super();
	}

	/**
	* Creates a new instance of {@link ConversationViewFragment}, initialized
	* to display conversation.
	*/
	public static ConversationViewFragment newInstance(Account account,
	Conversation conversation) {
	ConversationViewFragment f = new ConversationViewFragment();
	Bundle args = new Bundle();
	args.putParcelable(ARG_ACCOUNT, account);
	args.putParcelable(ARG_CONVERSATION, conversation);
	f.setArguments(args);
	return f;
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
	super.onActivityCreated(savedInstanceState);
	// Strictly speaking, we get back an android.app.Activity from getActivity. However, the
	// only activity creating a ConversationListContext is a MailActivity which is of type
	// ControllableActivity, so this cast should be safe. If this cast fails, some other
	// activity is creating ConversationListFragments. This activity must be of type
	// ControllableActivity.
	final Activity activity = getActivity();
	if (! (activity instanceof ControllableActivity)){
	LogUtils.wtf(LOG_TAG, "ConversationViewFragment expects only a ControllableActivity to"
	+ "create it. Cannot proceed.");
	}
	mActivity = (ControllableActivity) activity;
	mContext = mActivity.getApplicationContext();
	if (mActivity.isFinishing()) {
	// Activity is finishing, just bail.
	return;
	}
	mActivity.attachConversationView(this);
	mTemplates = new HtmlConversationTemplates(mContext);
	// Show conversation and start loading messages.
	showConversation();
	}

	@Override
	public void onCreate(Bundle savedState) {
	LogUtils.v(LOG_TAG, "onCreate in FolderListFragment(this=%s)", this);
	super.onCreate(savedState);

	Bundle args = getArguments();
	mAccount = args.getParcelable(ARG_ACCOUNT);
	mConversation = args.getParcelable(ARG_CONVERSATION);
	mBaseUri = "x-thread://" + mAccount.name + "/" + mConversation.id;
	}

	@Override
	public View onCreateView(LayoutInflater inflater,
	ViewGroup container, Bundle savedInstanceState) {
	View rootView = inflater.inflate(R.layout.conversation_view, null);
	mSubject = (TextView) rootView.findViewById(R.id.subject);
	mConversationContainer = (ConversationContainer) rootView
	.findViewById(R.id.conversation_container);
	mWebView = (ConversationWebView) rootView.findViewById(R.id.webview);

	mWebView.addJavascriptInterface(mJsBridge, "mail");

	mWebView.setWebChromeClient(new WebChromeClient() {
	@Override
	public boolean onConsoleMessage(ConsoleMessage consoleMessage) {
	LogUtils.i(LOG_TAG, "JS: %s (%s:%d)", consoleMessage.message(),
	consoleMessage.sourceId(), consoleMessage.lineNumber());
	return true;
	}
	});

	WebSettings settings = mWebView.getSettings();

	settings.setBlockNetworkImage(true);

	settings.setJavaScriptEnabled(true);
	settings.setUseWideViewPort(true);

	settings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NORMAL);

	settings.setSupportZoom(true);
	settings.setBuiltInZoomControls(true);
	settings.setDisplayZoomControls(false);

	return rootView;
	}

	@Override
	public void onDestroyView() {
	// Clear the adapter.
	mConversationContainer.setOverlayAdapter(null);
	mActivity.attachConversationView(null);

	super.onDestroyView();
	}

	/**
	* Handles a request to show a new conversation list, either from a search query or for viewing
	* a folder. This will initiate a data load, and hence must be called on the UI thread.
	*/
	private void showConversation() {
	mSubject.setText(mConversation.subject);
	getLoaderManager().initLoader(MESSAGE_LOADER_ID, Bundle.EMPTY, this);
	}

	@Override
	public Loader<Cursor> onCreateLoader(int id, Bundle args) {
	return new MessageLoader(mContext, mConversation.messageListUri);
	}

	@Override
	public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
	MessageCursor messageCursor = (MessageCursor) data;
	mWebView.loadDataWithBaseURL(mBaseUri, renderMessageBodies(messageCursor), "text/html",
	"utf-8", null);
	final Adapter messageListAdapter = new MessageListAdapter(
	mActivity.getActivityContext(), messageCursor, mAccount, getLoaderManager());
	mConversationContainer.setOverlayAdapter(messageListAdapter);
	}

	@Override
	public void onLoaderReset(Loader<Cursor> loader) {
	// Do nothing.
	}

	private String renderMessageBodies(MessageCursor messageCursor) {
	int pos = -1;
	mTemplates.startConversation(0);
	while (messageCursor.moveToPosition(++pos)) {
	mTemplates.appendMessageHtml(messageCursor.get(), true, false, 1.0f, 96);
	}
	return mTemplates.endConversation(mBaseUri, 320);
	}

	public void onTouchEvent(MotionEvent event) {
	// TODO: (mindyp) when there is an undo bar, check for event !in undo bar
	// if its not in undo bar, dismiss the undo bar.
	}

	private static class MessageLoader extends CursorLoader {

	public MessageLoader(Context c, Uri uri) {
	super(c, uri, UIProvider.MESSAGE_PROJECTION, null, null, null);
	}

	@Override
	public Cursor loadInBackground() {
	return new MessageCursor(super.loadInBackground());

	}
	}

	private static class MessageCursor extends CursorWrapper {

	private Map<Long, Message> mCache = Maps.newHashMap();

	public MessageCursor(Cursor inner) {
	super(inner);
	}

	public Message get() {
	long id = getWrappedCursor().getLong(0);
	Message m = mCache.get(id);
	if (m == null) {
	m = new Message(this);
	mCache.put(id, m);
	}
	return m;
	}
	}

	private static class MessageListAdapter extends ResourceCursorAdapter {

	private final FormattedDateBuilder mDateBuilder;
	private final Account mAccount;
	private final LoaderManager mLoaderManager;

	public MessageListAdapter(Context context, Cursor messageCursor, Account account,
	LoaderManager loaderManager) {
	super(context, R.layout.conversation_message_header, messageCursor, 0);
	mDateBuilder = new FormattedDateBuilder(context);
	mAccount = account;
	mLoaderManager = loaderManager;
	}

	@Override
	public void bindView(View view, Context context, Cursor cursor) {
	Message m = ((MessageCursor) cursor).get();
	MessageHeaderView header = (MessageHeaderView) view;
	header.initialize(mDateBuilder, mAccount, mLoaderManager, true, false, false);
	header.bind(m);
	}
	}

	/**
	* NOTE: all public methods must be listed in the proguard flags so that they can be accessed
	* via reflection and not stripped.
	*
	*/
	private class MailJsBridge {

	@SuppressWarnings("unused")
	public void onWebContentGeometryChange(final String[] headerBottomStrs) {
	mHandler.post(new Runnable() {
	@Override
	public void run() {
	final int len = headerBottomStrs.length;
	final int[] headerBottoms = new int[len];
	for (int i = 0; i < len; i++) {
	headerBottoms[i] = Integer.parseInt(headerBottomStrs[i]);
	}
	mConversationContainer.onGeometryChange(headerBottoms);
	}
	});
	}

	}

	}