replicant-packages_apps_Email/src/com/android/email/activity/MessageViewFragment.java

1180 lines
46 KiB
Java

/*
* Copyright (C) 2010 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.email.activity;
import com.android.email.Controller;
import com.android.email.ControllerResultUiThreadWrapper;
import com.android.email.Email;
import com.android.email.R;
import com.android.email.Utility;
import com.android.email.mail.Address;
import com.android.email.mail.MeetingInfo;
import com.android.email.mail.MessagingException;
import com.android.email.mail.PackedString;
import com.android.email.mail.internet.EmailHtmlUtil;
import com.android.email.mail.internet.MimeUtility;
import com.android.email.provider.AttachmentProvider;
import com.android.email.provider.EmailContent.Attachment;
import com.android.email.provider.EmailContent.Body;
import com.android.email.provider.EmailContent.Message;
import com.android.email.service.EmailServiceConstants;
import org.apache.commons.io.IOUtils;
import android.app.Activity;
import android.app.Fragment;
import android.content.ActivityNotFoundException;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.provider.ContactsContract;
import android.provider.ContactsContract.CommonDataKinds;
import android.provider.ContactsContract.QuickContact;
import android.text.TextUtils;
import android.util.Log;
import android.util.Patterns;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
// TODO Restore "Show pictures" state and scroll position on rotation.
public class MessageViewFragment extends Fragment implements View.OnClickListener {
private Context mContext;
// Regex that matches start of img tag. '<(?i)img\s+'.
private static final Pattern IMG_TAG_START_REGEX = Pattern.compile("<(?i)img\\s+");
// Regex that matches Web URL protocol part as case insensitive.
private static final Pattern WEB_URL_PROTOCOL = Pattern.compile("(?i)http|https://");
private static int PREVIEW_ICON_WIDTH = 62;
private static int PREVIEW_ICON_HEIGHT = 62;
private TextView mSubjectView;
private TextView mFromView;
private TextView mDateView;
private TextView mTimeView;
private TextView mToView;
private TextView mCcView;
private View mCcContainerView;
private WebView mMessageContentView;
private LinearLayout mAttachments;
private ImageView mAttachmentIcon;
private ImageView mFavoriteIcon;
private View mShowPicturesSection;
private View mInviteSection;
private ImageView mSenderPresenceView;
private View mScrollView;
// calendar meeting invite answers
private TextView mMeetingYes;
private TextView mMeetingMaybe;
private TextView mMeetingNo;
private int mPreviousMeetingResponse = -1;
/**
* If set, URI to the email (i.e. *.eml files, and possibly *.msg files) file that's being
* viewed.
*
* Use {@link #isViewingEmailFile()} to see if the activity is created for opening an EML file.
*
* TODO: We probably should split it into two different MessageViews, one for regular messages
* and the other for for EML files (these two will share the same base MessageView class) to
* eliminate the bunch of 'if {@link #isViewingEmailFile()}'s.
* Do this after making it into a fragment.
*/
private Uri mFileEmailUri;
private long mAccountId = -1;
private long mMessageId = -1;
private Message mMessage;
private LoadMessageTask mLoadMessageTask;
private LoadBodyTask mLoadBodyTask;
private LoadAttachmentsTask mLoadAttachmentsTask;
private PresenceUpdater mPresenceUpdater;
private long mLoadAttachmentId; // the attachment being saved/viewed
private boolean mLoadAttachmentSave; // if true, saving - if false, viewing
private String mLoadAttachmentName; // the display name
private java.text.DateFormat mDateFormat;
private java.text.DateFormat mTimeFormat;
private Drawable mFavoriteIconOn;
private Drawable mFavoriteIconOff;
private Controller mController;
private ControllerResultUiThreadWrapper<ControllerResults> mControllerCallback;
// contains the HTML body. Is used by LoadAttachmentTask to display inline images.
// is null most of the time, is used transiently to pass info to LoadAttachementTask
private String mHtmlTextRaw;
// contains the HTML content as set in WebView.
private String mHtmlTextWebView;
private boolean mStarted;
/**
* Encapsulates known information about a single attachment.
*/
private static class AttachmentInfo {
public String name;
public String contentType;
public long size;
public long attachmentId;
public Button viewButton;
public Button downloadButton;
public ImageView iconView;
}
public interface Callback {
/**
* Called when a link in a message is clicked.
*
* @param url link url that's clicked.
* @return true if handled, false otherwise.
*/
public boolean onUrlInMessageClicked(String url);
/** Called when the message specified doesn't exist. */
public void onMessageNotExists();
/** Called when the "view in calendar" link is clicked. */
public void onCalendarLinkClicked(long epochEventStartTime);
/** Called when it starts loading a message. */
public void onLoadMessageStarted();
/** Called when it successfully finishes loading a message. */
public void onLoadMessageFinished();
/** Called when an error occurred during loading a message. */
public void onLoadMessageError();
/** Called when the current message is set unread. */
public void onMessageSetUnread();
/**
* Called when a calender response button is clicked.
*
* @param response one of {@link EmailServiceConstants#MEETING_REQUEST_ACCEPTED},
* {@link EmailServiceConstants#MEETING_REQUEST_DECLINED}, or
* {@link EmailServiceConstants#MEETING_REQUEST_TENTATIVE}.
*/
public void onRespondedToInvite(int response);
/** Called when it starts loading an attachment. */
public void onFetchAttachmentStarted(String attachmentName);
/** Called when it successfully finishes loading an attachment. */
public void onFetchAttachmentFinished();
/** Called when an error occurred during loading an attachment. */
public void onFetchAttachmentError();
}
private static final class EmptyCallback implements Callback {
public static final Callback INSTANCE = new EmptyCallback();
@Override
public void onCalendarLinkClicked(long epochEventStartTime) {
}
@Override
public void onFetchAttachmentError() {
}
@Override
public void onFetchAttachmentFinished() {
}
@Override
public void onFetchAttachmentStarted(String attachmentName) {
}
@Override
public void onLoadMessageError() {
}
@Override
public void onLoadMessageFinished() {
}
@Override
public void onLoadMessageStarted() {
}
@Override
public void onMessageNotExists() {
}
@Override
public void onMessageSetUnread() {
}
@Override
public void onRespondedToInvite(int response) {
}
@Override
public boolean onUrlInMessageClicked(String url) {
return false;
}
}
private Callback mCallback = EmptyCallback.INSTANCE;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = getActivity().getApplicationContext();
mControllerCallback = new ControllerResultUiThreadWrapper<ControllerResults>(
new Handler(), new ControllerResults());
mPresenceUpdater = new PresenceUpdater(mContext);
mDateFormat = android.text.format.DateFormat.getDateFormat(mContext); // short format
mTimeFormat = android.text.format.DateFormat.getTimeFormat(mContext); // 12/24 date format
final Resources res = mContext.getResources();
mFavoriteIconOn = res.getDrawable(R.drawable.btn_star_big_buttonless_on);
mFavoriteIconOff = res.getDrawable(R.drawable.btn_star_big_buttonless_off);
mController = Controller.getInstance(mContext);
}
@Override
public View onCreateView(
LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.message_view_header, container, false);
mSubjectView = (TextView) view.findViewById(R.id.subject);
mFromView = (TextView) view.findViewById(R.id.from);
mToView = (TextView) view.findViewById(R.id.to);
mCcView = (TextView) view.findViewById(R.id.cc);
mCcContainerView = view.findViewById(R.id.cc_container);
mDateView = (TextView) view.findViewById(R.id.date);
mTimeView = (TextView) view.findViewById(R.id.time);
mMessageContentView = (WebView) view.findViewById(R.id.message_content);
mAttachments = (LinearLayout) view.findViewById(R.id.attachments);
mAttachmentIcon = (ImageView) view.findViewById(R.id.attachment);
mFavoriteIcon = (ImageView) view.findViewById(R.id.favorite);
mShowPicturesSection = view.findViewById(R.id.show_pictures_section);
mInviteSection = view.findViewById(R.id.invite_section);
mSenderPresenceView = (ImageView) view.findViewById(R.id.presence);
mScrollView = view.findViewById(R.id.scrollview);
mFromView.setOnClickListener(this);
mSenderPresenceView.setOnClickListener(this);
mFavoriteIcon.setOnClickListener(this);
view.findViewById(R.id.show_pictures).setOnClickListener(this);
mMeetingYes = (TextView) view.findViewById(R.id.accept);
mMeetingMaybe = (TextView) view.findViewById(R.id.maybe);
mMeetingNo = (TextView) view.findViewById(R.id.decline);
mMeetingYes.setOnClickListener(this);
mMeetingMaybe.setOnClickListener(this);
mMeetingNo.setOnClickListener(this);
view.findViewById(R.id.invite_link).setOnClickListener(this);
mMessageContentView.setVerticalScrollBarEnabled(false);
mMessageContentView.getSettings().setBlockNetworkLoads(true);
mMessageContentView.getSettings().setSupportZoom(false);
mMessageContentView.setWebViewClient(new CustomWebViewClient());
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mController.addResultCallback(mControllerCallback);
}
@Override
public void onStart() {
super.onStart();
mStarted = true;
if (mMessageId != -1 || mFileEmailUri != null) {
openMessageInternal();
}
}
@Override
public void onResume() {
super.onResume();
}
@Override
public void onPause() {
super.onPause();
}
@Override
public void onStop() {
mStarted = false;
super.onStop();
}
@Override
public void onDestroy() {
mController.removeResultCallback(mControllerCallback);
cancelAllTasks();
mMessageContentView.destroy();
mMessageContentView = null;
// If we're leaving a non-attachment message, delete any/all attachment messages
// TODO It's probably wronn. We can show an EML in other app's stack, in which case
// we can task-switch between the main app and the activity showing an EML.
// We probably have to keep track of the number of EMLs currently open in a static field.
if (!isViewingEmailFile()) {
mController.deleteAttachmentMessages();
}
super.onDestroy();
}
public void setCallback(Callback callback) {
mCallback = (callback == null) ? EmptyCallback.INSTANCE : callback;
}
private void cancelAllTasks() {
Utility.cancelTaskInterrupt(mLoadMessageTask);
mLoadMessageTask = null;
Utility.cancelTaskInterrupt(mLoadBodyTask);
mLoadBodyTask = null;
Utility.cancelTaskInterrupt(mLoadAttachmentsTask);
mLoadAttachmentsTask = null;
if (mPresenceUpdater != null) {
mPresenceUpdater.cancelAll();
}
}
/**
* @return true if viewing an email file. (i.e. *.eml files)
*/
private boolean isViewingEmailFile() {
return mFileEmailUri != null;
}
/**
* Returns the account id of the current message, or -1 if unknown.
* Probably doesn't make sense if {@link #isViewingEmailFile()}.
*/
public long getAccountId() {
return mAccountId;
}
/** Called by activities to set an id of a message to open. */
public void openMessage(long messageId) {
mFileEmailUri = null;
mMessageId = messageId;
mAccountId = -1;
if (mStarted) {
openMessageInternal();
}
}
/** Called by activities to a URI to an EML file to open. */
public void openMessage(Uri fileEmailUri) {
mFileEmailUri = fileEmailUri;
mMessageId = -1;
mAccountId = -1;
if (mStarted) {
openMessageInternal();
}
}
private void openMessageInternal() {
cancelAllTasks();
if (mMessageContentView != null) {
mMessageContentView.getSettings().setBlockNetworkLoads(true);
mMessageContentView.scrollTo(0, 0);
mMessageContentView.loadUrl("file:///android_asset/empty.html");
}
mScrollView.scrollTo(0, 0);
mAttachments.removeAllViews();
mAttachments.setVisibility(View.GONE);
mAttachmentIcon.setVisibility(View.GONE);
mLoadMessageTask = new LoadMessageTask(mFileEmailUri, mMessageId, true);
mLoadMessageTask.execute();
}
/**
* Handle clicks on sender, which shows {@link QuickContact} or prompts to add
* the sender as a contact.
*
* TODO Move DB lookup to a worker thread.
*/
private void onClickSender() {
// Bail early if message or sender not present
if (mMessage == null) return;
final Address senderEmail = Address.unpackFirst(mMessage.mFrom);
if (senderEmail == null) return;
// First perform lookup query to find existing contact
final ContentResolver resolver = mContext.getContentResolver();
final String address = senderEmail.getAddress();
final Uri dataUri = Uri.withAppendedPath(CommonDataKinds.Email.CONTENT_FILTER_URI,
Uri.encode(address));
final Uri lookupUri = ContactsContract.Data.getContactLookupUri(resolver, dataUri);
if (lookupUri != null) {
// Found matching contact, trigger QuickContact
QuickContact.showQuickContact(mContext, mSenderPresenceView, lookupUri,
QuickContact.MODE_LARGE, null);
} else {
// No matching contact, ask user to create one
final Uri mailUri = Uri.fromParts("mailto", address, null);
final Intent intent = new Intent(ContactsContract.Intents.SHOW_OR_CREATE_CONTACT,
mailUri);
// Pass along full E-mail string for possible create dialog
intent.putExtra(ContactsContract.Intents.EXTRA_CREATE_DESCRIPTION,
senderEmail.toString());
// Only provide personal name hint if we have one
final String senderPersonal = senderEmail.getPersonal();
if (!TextUtils.isEmpty(senderPersonal)) {
intent.putExtra(ContactsContract.Intents.Insert.NAME, senderPersonal);
}
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
startActivity(intent);
}
}
/**
* Toggle favorite status and write back to provider
*/
private void onClickFavorite() {
if (isViewingEmailFile()) {
return;
}
if (mMessage != null) {
// Update UI
boolean newFavorite = ! mMessage.mFlagFavorite;
mFavoriteIcon.setImageDrawable(newFavorite ? mFavoriteIconOn : mFavoriteIconOff);
// Update provider
mMessage.mFlagFavorite = newFavorite;
mController.setMessageFavorite(mMessageId, newFavorite);
}
}
/**
* Set message read/unread.
*/
public void onMarkMessageAsRead(boolean isRead) {
if (isViewingEmailFile()) {
return;
}
if (mMessage != null && mMessage.mFlagRead != isRead) {
mMessage.mFlagRead = isRead;
mController.setMessageRead(mMessageId, isRead);
if (!isRead) { // Became unread. We need to close the message.
mCallback.onMessageSetUnread();
}
}
}
/**
* Send a service message indicating that a meeting invite button has been clicked.
*/
private void onRespondToInvite(int response, int toastResId) {
if (isViewingEmailFile()) {
return;
}
// do not send twice in a row the same response
if (mPreviousMeetingResponse != response) {
mController.sendMeetingResponse(mMessageId, response);
mPreviousMeetingResponse = response;
}
Utility.showToast(getActivity(), toastResId);
mCallback.onRespondedToInvite(response);
}
private void onDownloadAttachment(AttachmentInfo attachment) {
if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
/*
* Abort early if there's no place to save the attachment. We don't want to spend
* the time downloading it and then abort.
*/
Utility.showToast(getActivity(), R.string.message_view_status_attachment_not_saved);
return;
}
startLoadAttachment(attachment, true);
}
private void onViewAttachment(AttachmentInfo attachment) {
startLoadAttachment(attachment, false);
}
private void startLoadAttachment(AttachmentInfo attachment, boolean save) {
mLoadAttachmentId = attachment.attachmentId;
mLoadAttachmentSave = save;
mLoadAttachmentName = attachment.name;
mController.loadAttachment(attachment.attachmentId, mMessageId, mMessage.mMailboxKey,
mAccountId);
}
/**
* Called by ControllerResults. Handle the final steps of downloading an attachment
* (view or save).
*
* @param attachmentId the attachment that was just downloaded
*/
private void doFinishLoadAttachment(long attachmentId) {
// If the result does't line up, just skip it - we handle one at a time.
if (attachmentId != mLoadAttachmentId) {
return;
}
Attachment attachment = Attachment.restoreAttachmentWithId(mContext, attachmentId);
Uri attachmentUri = AttachmentProvider.getAttachmentUri(mAccountId, attachment.mId);
Uri contentUri = AttachmentProvider.resolveAttachmentIdToContentUri(
mContext.getContentResolver(), attachmentUri);
if (mLoadAttachmentSave) {
try {
File file = Utility.createUniqueFile(Environment.getExternalStorageDirectory(),
attachment.mFileName);
InputStream in = mContext.getContentResolver().openInputStream(contentUri);
OutputStream out = new FileOutputStream(file);
IOUtils.copy(in, out);
out.flush();
out.close();
in.close();
Utility.showToast(getActivity(), String.format(
mContext.getString(R.string.message_view_status_attachment_saved),
file.getName()));
MediaOpener.scanAndOpen(getActivity(), file);
} catch (IOException ioe) {
Utility.showToast(getActivity(), R.string.message_view_status_attachment_not_saved);
}
} else {
try {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(contentUri);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION
| Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
startActivity(intent);
} catch (ActivityNotFoundException e) {
Utility.showToast(getActivity(), R.string.message_view_display_attachment_toast);
// TODO: Add a proper warning message (and lots of upstream cleanup to prevent
// it from happening) in the next release.
}
}
}
private void onShowPicturesInHtml() {
if (mMessage != null) {
if (mMessageContentView != null) {
mMessageContentView.getSettings().setBlockNetworkLoads(false);
if (mHtmlTextWebView != null) {
mMessageContentView.loadDataWithBaseURL("email://", mHtmlTextWebView,
"text/html", "utf-8", null);
}
}
mShowPicturesSection.setVisibility(View.GONE);
}
}
private void onInviteLinkClicked() {
if (isViewingEmailFile()) {
return;
}
String startTime = new PackedString(mMessage.mMeetingInfo).get(MeetingInfo.MEETING_DTSTART);
if (startTime != null) {
long epochTimeMillis = Utility.parseEmailDateTimeToMillis(startTime);
mCallback.onCalendarLinkClicked(epochTimeMillis);
} else {
Email.log("meetingInfo without DTSTART " + mMessage.mMeetingInfo);
}
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.from:
case R.id.presence:
onClickSender();
break;
case R.id.favorite:
onClickFavorite();
break;
case R.id.download:
onDownloadAttachment((AttachmentInfo) view.getTag());
break;
case R.id.view:
onViewAttachment((AttachmentInfo) view.getTag());
break;
case R.id.show_pictures:
onShowPicturesInHtml();
break;
case R.id.accept:
onRespondToInvite(EmailServiceConstants.MEETING_REQUEST_ACCEPTED,
R.string.message_view_invite_toast_yes);
break;
case R.id.maybe:
onRespondToInvite(EmailServiceConstants.MEETING_REQUEST_TENTATIVE,
R.string.message_view_invite_toast_maybe);
break;
case R.id.decline:
onRespondToInvite(EmailServiceConstants.MEETING_REQUEST_DECLINED,
R.string.message_view_invite_toast_no);
break;
case R.id.invite_link:
onInviteLinkClicked();
break;
}
}
/**
* Start checking presence of the sender of the message.
*
* Note: This is just a polling operation. A more advanced solution would be to keep the
* cursor open and respond to presence status updates (in the form of content change
* notifications). However, because presence changes fairly slowly compared to the duration
* of viewing a single message, a simple poll at message load (and onResume) should be
* sufficient.
*/
private void startPresenceCheck() {
// Set "unknown" presence icon.
mSenderPresenceView.setImageResource(PresenceUpdater.getPresenceIconResourceId(null));
if (mMessage != null) {
Address sender = Address.unpackFirst(mMessage.mFrom);
if (sender != null) {
String email = sender.getAddress();
if (email != null) {
mPresenceUpdater.checkPresence(email, new PresenceUpdater.Callback() {
@Override
public void onPresenceResult(String emailAddress, Integer presenceStatus) {
mSenderPresenceView.setImageResource(
PresenceUpdater.getPresenceIconResourceId(presenceStatus));
}
});
}
}
}
}
/**
* Async task for loading a single message outside of the UI thread
*/
private class LoadMessageTask extends AsyncTask<Void, Void, Message> {
private final long mId;
private final boolean mOkToFetch;
private final Uri mFileEmailUri;
/**
* Special constructor to cache some local info
*/
public LoadMessageTask(Uri fileEmailUri, long messageId, boolean okToFetch) {
mFileEmailUri = fileEmailUri;
mId = messageId;
mOkToFetch = okToFetch;
}
/**
* There will either be a Uri in the Intent (i.e. whose content is the Message to be
* loaded), or mId will be holding the id of the Message as stored in the provider.
* If we're loading via Uri, the Controller does the actual message parsing and storage,
* and we setup the message id and mailbox id based on the result; forward and reply are
* disabled for messages loaded via Uri
*/
@Override
protected Message doInBackground(Void... params) {
// If we have a URI, then we were opened via an intent filter (e.g. an attachment that
// has a mime type that we can handle (e.g. message/rfc822).
if (mFileEmailUri != null) {
final Activity activity = getActivity();
// Put up a toast; this can take a little while...
Utility.showToast(activity, R.string.message_view_parse_message_toast);
Message msg = mController.loadMessageFromUri(mFileEmailUri);
if (msg == null) {
// Indicate that the attachment couldn't be loaded
Utility.showToast(activity, R.string.message_view_display_attachment_toast);
return null;
}
return msg;
}
return Message.restoreMessageWithId(mContext, mId);
}
@Override
protected void onPostExecute(Message message) {
/* doInBackground() may return null result (due to restoreMessageWithId())
* and in that situation we want to Activity.finish().
*
* OTOH we don't want to Activity.finish() for isCancelled() because this
* would introduce a surprise side-effect to task cancellation: every task
* cancelation would also result in finish().
*
* Right now LoadMesageTask is cancelled not only from onDestroy(),
* and it would be a bug to also finish() the activity in that situation.
*/
if (isCancelled()) {
return;
}
if (message == null) {
mCallback.onMessageNotExists();
return;
}
mMessageId = message.mId;
reloadUiFromMessage(message, mOkToFetch);
startPresenceCheck();
}
}
/**
* Async task for loading a single message body outside of the UI thread
*/
private class LoadBodyTask extends AsyncTask<Void, Void, String[]> {
private long mId;
private boolean mErrorLoadingMessageBody;
/**
* Special constructor to cache some local info
*/
public LoadBodyTask(long messageId) {
mId = messageId;
}
@Override
protected String[] doInBackground(Void... params) {
try {
String text = null;
String html = Body.restoreBodyHtmlWithMessageId(mContext, mId);
if (html == null) {
text = Body.restoreBodyTextWithMessageId(mContext, mId);
}
return new String[] { text, html };
} catch (RuntimeException re) {
// This catches SQLiteException as well as other RTE's we've seen from the
// database calls, such as IllegalStateException
Log.d(Email.LOG_TAG, "Exception while loading message body: " + re.toString());
mErrorLoadingMessageBody = true;
return new String[] { null, null };
}
}
@Override
protected void onPostExecute(String[] results) {
if (results == null) {
if (mErrorLoadingMessageBody) {
Utility.showToast(getActivity(), R.string.error_loading_message_body);
}
return;
}
reloadUiFromBody(results[0], results[1]); // text, html
onMarkMessageAsRead(true);
}
}
/**
* Async task for loading attachments
*
* Note: This really should only be called when the message load is complete - or, we should
* leave open a listener so the attachments can fill in as they are discovered. In either case,
* this implementation is incomplete, as it will fail to refresh properly if the message is
* partially loaded at this time.
*/
private class LoadAttachmentsTask extends AsyncTask<Long, Void, Attachment[]> {
@Override
protected Attachment[] doInBackground(Long... messageIds) {
return Attachment.restoreAttachmentsWithMessageId(mContext, messageIds[0]);
}
@Override
protected void onPostExecute(Attachment[] attachments) {
if (attachments == null) {
return;
}
boolean htmlChanged = false;
for (Attachment attachment : attachments) {
if (mHtmlTextRaw != null && attachment.mContentId != null
&& attachment.mContentUri != null) {
// for html body, replace CID for inline images
// Regexp which matches ' src="cid:contentId"'.
String contentIdRe =
"\\s+(?i)src=\"cid(?-i):\\Q" + attachment.mContentId + "\\E\"";
String srcContentUri = " src=\"" + attachment.mContentUri + "\"";
mHtmlTextRaw = mHtmlTextRaw.replaceAll(contentIdRe, srcContentUri);
htmlChanged = true;
} else {
addAttachment(attachment);
}
}
mHtmlTextWebView = mHtmlTextRaw;
mHtmlTextRaw = null;
if (htmlChanged && mMessageContentView != null) {
mMessageContentView.loadDataWithBaseURL("email://", mHtmlTextWebView,
"text/html", "utf-8", null);
}
}
}
private Bitmap getPreviewIcon(AttachmentInfo attachment) {
try {
return BitmapFactory.decodeStream(
mContext.getContentResolver().openInputStream(
AttachmentProvider.getAttachmentThumbnailUri(
mAccountId, attachment.attachmentId,
PREVIEW_ICON_WIDTH,
PREVIEW_ICON_HEIGHT)));
} catch (Exception e) {
// We don't care what happened, we just return null for the preview icon.
return null;
}
}
private void updateAttachmentThumbnail(long attachmentId) {
for (int i = 0, count = mAttachments.getChildCount(); i < count; i++) {
AttachmentInfo attachment = (AttachmentInfo) mAttachments.getChildAt(i).getTag();
if (attachment.attachmentId == attachmentId) {
Bitmap previewIcon = getPreviewIcon(attachment);
if (previewIcon != null) {
attachment.iconView.setImageBitmap(previewIcon);
}
return;
}
}
}
/**
* Copy data from a cursor-refreshed attachment into the UI. Called from UI thread.
*
* @param attachment A single attachment loaded from the provider
*/
private void addAttachment(Attachment attachment) {
AttachmentInfo attachmentInfo = new AttachmentInfo();
attachmentInfo.size = attachment.mSize;
attachmentInfo.contentType =
AttachmentProvider.inferMimeType(attachment.mFileName, attachment.mMimeType);
attachmentInfo.name = attachment.mFileName;
attachmentInfo.attachmentId = attachment.mId;
LayoutInflater inflater = getActivity().getLayoutInflater();
View view = inflater.inflate(R.layout.message_view_attachment, null);
TextView attachmentName = (TextView)view.findViewById(R.id.attachment_name);
TextView attachmentInfoView = (TextView)view.findViewById(R.id.attachment_info);
ImageView attachmentIcon = (ImageView)view.findViewById(R.id.attachment_icon);
Button attachmentView = (Button)view.findViewById(R.id.view);
Button attachmentDownload = (Button)view.findViewById(R.id.download);
if ((!MimeUtility.mimeTypeMatches(attachmentInfo.contentType,
Email.ACCEPTABLE_ATTACHMENT_VIEW_TYPES))
|| (MimeUtility.mimeTypeMatches(attachmentInfo.contentType,
Email.UNACCEPTABLE_ATTACHMENT_VIEW_TYPES))) {
attachmentView.setVisibility(View.GONE);
}
if ((!MimeUtility.mimeTypeMatches(attachmentInfo.contentType,
Email.ACCEPTABLE_ATTACHMENT_DOWNLOAD_TYPES))
|| (MimeUtility.mimeTypeMatches(attachmentInfo.contentType,
Email.UNACCEPTABLE_ATTACHMENT_DOWNLOAD_TYPES))) {
attachmentDownload.setVisibility(View.GONE);
}
if (attachmentInfo.size > Email.MAX_ATTACHMENT_DOWNLOAD_SIZE) {
attachmentView.setVisibility(View.GONE);
attachmentDownload.setVisibility(View.GONE);
}
attachmentInfo.viewButton = attachmentView;
attachmentInfo.downloadButton = attachmentDownload;
attachmentInfo.iconView = attachmentIcon;
view.setTag(attachmentInfo);
attachmentView.setOnClickListener(this);
attachmentView.setTag(attachmentInfo);
attachmentDownload.setOnClickListener(this);
attachmentDownload.setTag(attachmentInfo);
attachmentName.setText(attachmentInfo.name);
attachmentInfoView.setText(Utility.formatSize(mContext, attachmentInfo.size));
Bitmap previewIcon = getPreviewIcon(attachmentInfo);
if (previewIcon != null) {
attachmentIcon.setImageBitmap(previewIcon);
}
mAttachments.addView(view);
mAttachments.setVisibility(View.VISIBLE);
}
/**
* Reload the UI from a provider cursor. This must only be called from the UI thread.
*
* @param message A copy of the message loaded from the database
* @param okToFetch If true, and message is not fully loaded, it's OK to fetch from
* the network. Use false to prevent looping here.
*
* TODO: trigger presence check
*/
private void reloadUiFromMessage(Message message, boolean okToFetch) {
mMessage = message;
mAccountId = message.mAccountKey;
mSubjectView.setText(message.mSubject);
mFromView.setText(Address.toFriendly(Address.unpack(message.mFrom)));
Date date = new Date(message.mTimeStamp);
mTimeView.setText(mTimeFormat.format(date));
mDateView.setText(Utility.isDateToday(date) ? null : mDateFormat.format(date));
mToView.setText(Address.toFriendly(Address.unpack(message.mTo)));
String friendlyCc = Address.toFriendly(Address.unpack(message.mCc));
mCcView.setText(friendlyCc);
mCcContainerView.setVisibility((friendlyCc != null) ? View.VISIBLE : View.GONE);
mAttachmentIcon.setVisibility(message.mAttachments != null ? View.VISIBLE : View.GONE);
mFavoriteIcon.setImageDrawable(message.mFlagFavorite ? mFavoriteIconOn : mFavoriteIconOff);
// Show the message invite section if we're an incoming meeting invitation only
mInviteSection.setVisibility((message.mFlags & Message.FLAG_INCOMING_MEETING_INVITE) != 0 ?
View.VISIBLE : View.GONE);
// Handle partially-loaded email, as follows:
// 1. Check value of message.mFlagLoaded
// 2. If != LOADED, ask controller to load it
// 3. Controller callback (after loaded) should trigger LoadBodyTask & LoadAttachmentsTask
// 4. Else start the loader tasks right away (message already loaded)
if (okToFetch && message.mFlagLoaded != Message.FLAG_LOADED_COMPLETE) {
mControllerCallback.getWrappee().setWaitForLoadMessageId(message.mId);
mController.loadMessageForView(message.mId);
} else {
mControllerCallback.getWrappee().setWaitForLoadMessageId(-1);
// Ask for body
mLoadBodyTask = new LoadBodyTask(message.mId);
mLoadBodyTask.execute();
}
}
/**
* Reload the body from the provider cursor. This must only be called from the UI thread.
*
* @param bodyText text part
* @param bodyHtml html part
*
* TODO deal with html vs text and many other issues <- WHAT DOES IT MEAN??
*/
private void reloadUiFromBody(String bodyText, String bodyHtml) {
String text = null;
mHtmlTextRaw = null;
boolean hasImages = false;
if (bodyHtml == null) {
text = bodyText;
/*
* Convert the plain text to HTML
*/
StringBuffer sb = new StringBuffer("<html><body>");
if (text != null) {
// Escape any inadvertent HTML in the text message
text = EmailHtmlUtil.escapeCharacterToDisplay(text);
// Find any embedded URL's and linkify
Matcher m = Patterns.WEB_URL.matcher(text);
while (m.find()) {
int start = m.start();
/*
* WEB_URL_PATTERN may match domain part of email address. To detect
* this false match, the character just before the matched string
* should not be '@'.
*/
if (start == 0 || text.charAt(start - 1) != '@') {
String url = m.group();
Matcher proto = WEB_URL_PROTOCOL.matcher(url);
String link;
if (proto.find()) {
// This is work around to force URL protocol part be lower case,
// because WebView could follow only lower case protocol link.
link = proto.group().toLowerCase() + url.substring(proto.end());
} else {
// Patterns.WEB_URL matches URL without protocol part,
// so added default protocol to link.
link = "http://" + url;
}
String href = String.format("<a href=\"%s\">%s</a>", link, url);
m.appendReplacement(sb, href);
}
else {
m.appendReplacement(sb, "$0");
}
}
m.appendTail(sb);
}
sb.append("</body></html>");
text = sb.toString();
} else {
text = bodyHtml;
mHtmlTextRaw = bodyHtml;
hasImages = IMG_TAG_START_REGEX.matcher(text).find();
}
// TODO this is not really accurate.
// - Images aren't the only network resources. (e.g. CSS)
// - If images are attached to the email and small enough, we download them at once,
// and won't need network access when they're shown.
mShowPicturesSection.setVisibility(hasImages ? View.VISIBLE : View.GONE);
if (mMessageContentView != null) {
mMessageContentView.loadDataWithBaseURL("email://", text, "text/html", "utf-8", null);
}
// Ask for attachments after body
mLoadAttachmentsTask = new LoadAttachmentsTask();
mLoadAttachmentsTask.execute(mMessage.mId);
}
/**
* Overrides for WebView behaviors.
*/
private class CustomWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return mCallback.onUrlInMessageClicked(url);
}
}
/**
* Controller results listener. We wrap it with {@link ControllerResultUiThreadWrapper},
* so all methods are called on the UI thread.
*/
private class ControllerResults extends Controller.Result {
private long mWaitForLoadMessageId;
public void setWaitForLoadMessageId(long messageId) {
mWaitForLoadMessageId = messageId;
}
@Override
public void loadMessageForViewCallback(MessagingException result, long messageId,
int progress) {
if (messageId != mWaitForLoadMessageId) {
// We are not waiting for this message to load, so exit quickly
return;
}
if (result == null) {
switch (progress) {
case 0:
mCallback.onLoadMessageStarted();
loadBodyContent("file:///android_asset/loading.html");
break;
case 100:
mWaitForLoadMessageId = -1;
mCallback.onLoadMessageFinished();
// reload UI and reload everything else too
// pass false to LoadMessageTask to prevent looping here
cancelAllTasks();
mLoadMessageTask = new LoadMessageTask(mFileEmailUri, mMessageId, false);
mLoadMessageTask.execute();
break;
default:
// do nothing - we don't have a progress bar at this time
break;
}
} else {
mWaitForLoadMessageId = -1;
mCallback.onLoadMessageError();
Utility.showToast(getActivity(), R.string.status_network_error);
loadBodyContent("file:///android_asset/empty.html");
}
}
private void loadBodyContent(String uri) {
if (mMessageContentView != null) {
mMessageContentView.loadUrl(uri);
}
}
@Override
public void loadAttachmentCallback(MessagingException result, long messageId,
long attachmentId, int progress) {
if (messageId == mMessageId) {
if (result == null) {
switch (progress) {
case 0:
enableAttachments(false);
mCallback.onFetchAttachmentStarted(mLoadAttachmentName);
Utility.showToast(getActivity(),
R.string.message_view_fetching_attachment_toast);
break;
case 100:
enableAttachments(true);
mCallback.onFetchAttachmentFinished();
updateAttachmentThumbnail(attachmentId);
doFinishLoadAttachment(attachmentId);
break;
default:
// do nothing - we don't have a progress bar at this time
break;
}
} else {
enableAttachments(true);
mCallback.onFetchAttachmentError();
Utility.showToast(getActivity(), R.string.status_network_error);
}
}
}
private void enableAttachments(boolean enable) {
for (int i = 0, count = mAttachments.getChildCount(); i < count; i++) {
AttachmentInfo attachment = (AttachmentInfo) mAttachments.getChildAt(i).getTag();
attachment.viewButton.setEnabled(enable);
attachment.downloadButton.setEnabled(enable);
}
}
@Override
public void updateMailboxCallback(MessagingException result, long accountId,
long mailboxId, int progress, int numNewMessages) {
if (result != null || progress == 100) {
Email.updateMailboxRefreshTime(mailboxId);
}
}
}
}