The Tor Browser: mobile/android/base/FilePickerResultHandler.java@6474c204b198 (annotated)

mobile/android/base/FilePickerResultHandler.java@6474c204b198 (annotated)

mobile/android/base/FilePickerResultHandler.java

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
  * You can obtain one at http://mozilla.org/MPL/2.0/. */
 package org.mozilla.gecko;
 import org.mozilla.gecko.mozglue.GeckoLoader;
 import org.mozilla.gecko.util.ActivityResultHandler;
 import org.mozilla.gecko.util.ThreadUtils;
 import android.app.Activity;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Environment;
 import android.provider.MediaStore;
 import android.provider.OpenableColumns;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.LoaderManager;
 import android.support.v4.app.LoaderManager.LoaderCallbacks;
 import android.support.v4.content.CursorLoader;
 import android.support.v4.content.Loader;
 import android.text.TextUtils;
 import android.text.format.Time;
 import android.util.Log;
 import android.os.Process;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.InputStream;
 import java.io.IOException;
 class FilePickerResultHandler implements ActivityResultHandler {
     private static final String LOGTAG = "GeckoFilePickerResultHandler";
     private static final String UPLOADS_DIR = "uploads";
     protected final FilePicker.ResultHandler handler;
     private final int tabId;
     private final File cacheDir;
     // this code is really hacky and doesn't belong anywhere so I'm putting it here for now
     // until I can come up with a better solution.
     private String mImageName = "";
     /* Use this constructor to asynchronously listen for results */
     public FilePickerResultHandler(final FilePicker.ResultHandler handler, final Context context, final int tabId) {
         this.tabId = tabId;
         cacheDir = new File(context.getCacheDir(), UPLOADS_DIR);
         this.handler = handler;
     }
     private void sendResult(String res) {
         if (handler != null) {
             handler.gotFile(res);
         }
     }
     @Override
     public void onActivityResult(int resultCode, Intent intent) {
         if (resultCode != Activity.RESULT_OK) {
             sendResult("");
             return;
         }
         // Camera results won't return an Intent. Use the file name we passed to the original intent.
         if (intent == null) {
             if (mImageName != null) {
                 File file = new File(Environment.getExternalStorageDirectory(), mImageName);
                 sendResult(file.getAbsolutePath());
             } else {
                 sendResult("");
             }
             return;
         }
         Uri uri = intent.getData();
         if (uri == null) {
             sendResult("");
             return;
         }
         // Some file pickers may return a file uri
         if ("file".equals(uri.getScheme())) {
             String path = uri.getPath();
             sendResult(path == null ? "" : path);
             return;
         }
         final FragmentActivity fa = (FragmentActivity) GeckoAppShell.getGeckoInterface().getActivity();
         final LoaderManager lm = fa.getSupportLoaderManager();
         // Finally, Video pickers and some file pickers may return a content provider.
         Cursor cursor = null;
         try {
             // Try a query to make sure the expected columns exist
             final ContentResolver cr = fa.getContentResolver();
             cursor = cr.query(uri, new String[] { MediaStore.Video.Media.DATA }, null, null, null);
             int index = cursor.getColumnIndex(MediaStore.Video.Media.DATA);
             if (index >= 0) {
                 lm.initLoader(intent.hashCode(), null, new VideoLoaderCallbacks(uri));
                 return;
             }
         } catch(Exception ex) {
             // We'll try a different loader below
         } finally {
             if (cursor != null) {
                 cursor.close();
             }
         }
         lm.initLoader(uri.hashCode(), null, new FileLoaderCallbacks(uri));
         return;
     }
     public String generateImageName() {
         Time now = new Time();
         now.setToNow();
         mImageName = now.format("%Y-%m-%d %H.%M.%S") + ".jpg";
         return mImageName;
     }
     private class VideoLoaderCallbacks implements LoaderCallbacks<Cursor> {
         final private Uri uri;
         public VideoLoaderCallbacks(Uri uri) {
             this.uri = uri;
         }
         @Override
         public Loader<Cursor> onCreateLoader(int id, Bundle args) {
             final FragmentActivity fa = (FragmentActivity) GeckoAppShell.getGeckoInterface().getActivity();
             return new CursorLoader(fa,
                                     uri,
                                     new String[] { MediaStore.Video.Media.DATA },
                                     null,  // selection
                                     null,  // selectionArgs
                                     null); // sortOrder
         }
         @Override
         public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
             if (cursor.moveToFirst()) {
                 String res = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));
                 // Some pickers (the KitKat Documents one for instance) won't return a temporary file here.
                 // Fall back to the normal FileLoader if we didn't find anything.
                 if (TextUtils.isEmpty(res)) {
                     tryFileLoaderCallback();
                     return;
                 }
                 sendResult(res);
             } else {
                 tryFileLoaderCallback();
             }
         }
         private void tryFileLoaderCallback() {
             final FragmentActivity fa = (FragmentActivity) GeckoAppShell.getGeckoInterface().getActivity();
             final LoaderManager lm = fa.getSupportLoaderManager();
             lm.initLoader(uri.hashCode(), null, new FileLoaderCallbacks(uri));
         }
         @Override
         public void onLoaderReset(Loader<Cursor> loader) { }
     }
     private class FileLoaderCallbacks implements LoaderCallbacks<Cursor>,
                                                  Tabs.OnTabsChangedListener {
         final private Uri uri;
         private String tempFile;
         public FileLoaderCallbacks(Uri uri) {
             this.uri = uri;
         }
         @Override
         public Loader<Cursor> onCreateLoader(int id, Bundle args) {
             final FragmentActivity fa = (FragmentActivity) GeckoAppShell.getGeckoInterface().getActivity();
             return new CursorLoader(fa,
                                     uri,
                                     new String[] { OpenableColumns.DISPLAY_NAME },
                                     null,  // selection
                                     null,  // selectionArgs
                                     null); // sortOrder
         }
         @Override
         public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
             if (cursor.moveToFirst()) {
                 String name = cursor.getString(0);
                 // tmp filenames must be at least 3 characters long. Add a prefix to make sure that happens
                 String fileName = "tmp_" + Process.myPid() + "-";
                 String fileExt = null;
                 int period;
                 final FragmentActivity fa = (FragmentActivity) GeckoAppShell.getGeckoInterface().getActivity();
                 final ContentResolver cr = fa.getContentResolver();
                 // Generate an extension if we don't already have one
                 if (name == null || (period = name.lastIndexOf('.')) == -1) {
                     String mimeType = cr.getType(uri);
                     fileExt = "." + GeckoAppShell.getExtensionFromMimeType(mimeType);
                 } else {
                     fileExt = name.substring(period);
                     fileName += name.substring(0, period);
                 }
                 // Now write the data to the temp file
                 try {
                     cacheDir.mkdir();
                     File file = File.createTempFile(fileName, fileExt, cacheDir);
                     FileOutputStream fos = new FileOutputStream(file);
                     InputStream is = cr.openInputStream(uri);
                     byte[] buf = new byte[4096];
                     int len = is.read(buf);
                     while (len != -1) {
                         fos.write(buf, 0, len);
                         len = is.read(buf);
                     }
                     fos.close();
                     tempFile = file.getAbsolutePath();
                     sendResult((tempFile == null) ? "" : tempFile);
                     if (tabId > -1 && !TextUtils.isEmpty(tempFile)) {
                         Tabs.registerOnTabsChangedListener(this);
                     }
                 } catch(IOException ex) {
                     Log.i(LOGTAG, "Error writing file", ex);
                 }
             } else {
                 sendResult("");
             }
         }
         @Override
         public void onLoaderReset(Loader<Cursor> loader) { }
         /*Tabs.OnTabsChangedListener*/
         // This cleans up our temp file. If it doesn't run, we just hope that Android
         // will eventually does the cleanup for us.
         @Override
         public void onTabChanged(Tab tab, Tabs.TabEvents msg, Object data) {
             if (tab.getId() != tabId) {
                 return;
             }
             if (msg == Tabs.TabEvents.LOCATION_CHANGE ||
                 msg == Tabs.TabEvents.CLOSED) {
                 ThreadUtils.postToBackgroundThread(new Runnable() {
                     @Override
                     public void run() {
                         File f = new File(tempFile);
                         f.delete();
                     }
                 });
                 // Tabs' listener array is safe to modify during use: its
                 // iteration pattern is based on snapshots.
                 Tabs.unregisterOnTabsChangedListener(this);
             }
         }
     }
 }

The Tor Browser / annotate

mobile/android/base/FilePickerResultHandler.java@6474c204b198 (annotated)

mobile/android/base/FilePickerResultHandler.java