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/* 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.GeckoAppShell;
import org.mozilla.gecko.util.GeckoEventListener;
import org.json.JSONException;
import org.json.JSONObject;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.os.Environment;
import android.os.Parcelable;
import android.provider.MediaStore;
import android.text.TextUtils;
import android.util.Log;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class FilePicker implements GeckoEventListener {
private static final String LOGTAG = "GeckoFilePicker";
private static FilePicker sFilePicker;
private final Context context;
public interface ResultHandler {
public void gotFile(String filename);
}
public static void init(Context context) {
if (sFilePicker == null) {
sFilePicker = new FilePicker(context.getApplicationContext());
}
}
protected FilePicker(Context context) {
this.context = context;
EventDispatcher.getInstance().registerGeckoThreadListener(this, "FilePicker:Show");
}
@Override
public void handleMessage(String event, final JSONObject message) {
if (event.equals("FilePicker:Show")) {
String mimeType = "*/*";
final String mode = message.optString("mode");
final int tabId = message.optInt("tabId", -1);
final String title = message.optString("title");
if ("mimeType".equals(mode))
mimeType = message.optString("mimeType");
else if ("extension".equals(mode))
mimeType = GeckoAppShell.getMimeTypeFromExtensions(message.optString("extensions"));
showFilePickerAsync(title, mimeType, new ResultHandler() {
@Override
public void gotFile(String filename) {
try {
message.put("file", filename);
} catch (JSONException ex) {
Log.i(LOGTAG, "Can't add filename to message " + filename);
}
GeckoAppShell.notifyObservers("FilePicker:Result", message.toString());
}
}, tabId);
}
}
private void addActivities(Intent intent, HashMap<String, Intent> intents, HashMap<String, Intent> filters) {
PackageManager pm = context.getPackageManager();
List<ResolveInfo> lri = pm.queryIntentActivities(intent, 0);
for (ResolveInfo ri : lri) {
ComponentName cn = new ComponentName(ri.activityInfo.applicationInfo.packageName, ri.activityInfo.name);
if (filters != null && !filters.containsKey(cn.toString())) {
Intent rintent = new Intent(intent);
rintent.setComponent(cn);
intents.put(cn.toString(), rintent);
}
}
}
private Intent getIntent(String mimeType) {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType(mimeType);
intent.addCategory(Intent.CATEGORY_OPENABLE);
return intent;
}
private List<Intent> getIntentsForFilePicker(final String mimeType,
final FilePickerResultHandler fileHandler) {
// The base intent to use for the file picker. Even if this is an implicit intent, Android will
// still show a list of Activities that match this action/type.
Intent baseIntent;
// A HashMap of Activities the base intent will show in the chooser. This is used
// to filter activities from other intents so that we don't show duplicates.
HashMap<String, Intent> baseIntents = new HashMap<String, Intent>();
// A list of other activities to shwo in the picker (and the intents to launch them).
HashMap<String, Intent> intents = new HashMap<String, Intent> ();
if ("audio/*".equals(mimeType)) {
// For audio the only intent is the mimetype
baseIntent = getIntent(mimeType);
addActivities(baseIntent, baseIntents, null);
} else if ("image/*".equals(mimeType)) {
// For images the base is a capture intent
baseIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
baseIntent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
fileHandler.generateImageName())));
addActivities(baseIntent, baseIntents, null);
// We also add the mimetype intent
addActivities(getIntent(mimeType), intents, baseIntents);
} else if ("video/*".equals(mimeType)) {
// For videos the base is a capture intent
baseIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
addActivities(baseIntent, baseIntents, null);
// We also add the mimetype intent
addActivities(getIntent(mimeType), intents, baseIntents);
} else {
baseIntent = getIntent("*/*");
addActivities(baseIntent, baseIntents, null);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
fileHandler.generateImageName())));
addActivities(intent, intents, baseIntents);
intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
addActivities(intent, intents, baseIntents);
}
// If we didn't find any activities, we fall back to the */* mimetype intent
if (baseIntents.size() == 0 && intents.size() == 0) {
intents.clear();
baseIntent = getIntent("*/*");
addActivities(baseIntent, baseIntents, null);
}
ArrayList<Intent> vals = new ArrayList<Intent>(intents.values());
vals.add(0, baseIntent);
return vals;
}
private String getFilePickerTitle(String mimeType) {
if (mimeType.equals("audio/*")) {
return context.getString(R.string.filepicker_audio_title);
} else if (mimeType.equals("image/*")) {
return context.getString(R.string.filepicker_image_title);
} else if (mimeType.equals("video/*")) {
return context.getString(R.string.filepicker_video_title);
} else {
return context.getString(R.string.filepicker_title);
}
}
private interface IntentHandler {
public void gotIntent(Intent intent);
}
/* Gets an intent that can open a particular mimetype. Will show a prompt with a list
* of Activities that can handle the mietype. Asynchronously calls the handler when
* one of the intents is selected. If the caller passes in null for the handler, will still
* prompt for the activity, but will throw away the result.
*/
private void getFilePickerIntentAsync(String title,
final String mimeType,
final FilePickerResultHandler fileHandler,
final IntentHandler handler) {
List<Intent> intents = getIntentsForFilePicker(mimeType, fileHandler);
if (intents.size() == 0) {
Log.i(LOGTAG, "no activities for the file picker!");
handler.gotIntent(null);
return;
}
Intent base = intents.remove(0);
if (intents.size() == 0) {
handler.gotIntent(base);
return;
}
if (TextUtils.isEmpty(title)) {
title = getFilePickerTitle(mimeType);
}
Intent chooser = Intent.createChooser(base, title);
chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, intents.toArray(new Parcelable[intents.size()]));
handler.gotIntent(chooser);
}
/* Allows the user to pick an activity to load files from using a list prompt. Then opens the activity and
* sends the file returned to the passed in handler. If a null handler is passed in, will still
* pick and launch the file picker, but will throw away the result.
*/
protected void showFilePickerAsync(final String title, final String mimeType, final ResultHandler handler, final int tabId) {
final FilePickerResultHandler fileHandler = new FilePickerResultHandler(handler, context, tabId);
getFilePickerIntentAsync(title, mimeType, fileHandler, new IntentHandler() {
@Override
public void gotIntent(Intent intent) {
if (handler == null) {
return;
}
if (intent == null) {
handler.gotFile("");
return;
}
ActivityHandlerHelper.startIntent(intent, fileHandler);
}
});
}
}
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