228 lines
9.2 KiB
Java
228 lines
9.2 KiB
Java
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko;
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import org.mozilla.gecko.GeckoAppShell;
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import org.mozilla.gecko.util.GeckoEventListener;
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import org.json.JSONException;
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import org.json.JSONObject;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.PackageManager;
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import android.content.pm.ResolveInfo;
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import android.net.Uri;
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import android.os.Environment;
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import android.os.Parcelable;
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import android.provider.MediaStore;
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import android.text.TextUtils;
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import android.util.Log;
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import java.io.File;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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public class FilePicker implements GeckoEventListener {
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private static final String LOGTAG = "GeckoFilePicker";
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private static FilePicker sFilePicker;
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private final Context context;
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public interface ResultHandler {
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public void gotFile(String filename);
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}
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public static void init(Context context) {
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if (sFilePicker == null) {
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sFilePicker = new FilePicker(context.getApplicationContext());
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}
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}
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protected FilePicker(Context context) {
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this.context = context;
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EventDispatcher.getInstance().registerGeckoThreadListener(this, "FilePicker:Show");
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}
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@Override
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public void handleMessage(String event, final JSONObject message) {
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if (event.equals("FilePicker:Show")) {
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String mimeType = "*/*";
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final String mode = message.optString("mode");
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final int tabId = message.optInt("tabId", -1);
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final String title = message.optString("title");
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if ("mimeType".equals(mode))
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mimeType = message.optString("mimeType");
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else if ("extension".equals(mode))
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mimeType = GeckoAppShell.getMimeTypeFromExtensions(message.optString("extensions"));
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showFilePickerAsync(title, mimeType, new ResultHandler() {
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@Override
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public void gotFile(String filename) {
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try {
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message.put("file", filename);
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} catch (JSONException ex) {
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Log.i(LOGTAG, "Can't add filename to message " + filename);
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}
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GeckoAppShell.notifyObservers("FilePicker:Result", message.toString());
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}
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}, tabId);
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}
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}
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private void addActivities(Intent intent, HashMap<String, Intent> intents, HashMap<String, Intent> filters) {
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PackageManager pm = context.getPackageManager();
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List<ResolveInfo> lri = pm.queryIntentActivities(intent, 0);
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for (ResolveInfo ri : lri) {
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ComponentName cn = new ComponentName(ri.activityInfo.applicationInfo.packageName, ri.activityInfo.name);
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if (filters != null && !filters.containsKey(cn.toString())) {
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Intent rintent = new Intent(intent);
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rintent.setComponent(cn);
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intents.put(cn.toString(), rintent);
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}
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}
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}
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private Intent getIntent(String mimeType) {
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Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
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intent.setType(mimeType);
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intent.addCategory(Intent.CATEGORY_OPENABLE);
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return intent;
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}
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private List<Intent> getIntentsForFilePicker(final String mimeType,
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final FilePickerResultHandler fileHandler) {
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// The base intent to use for the file picker. Even if this is an implicit intent, Android will
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// still show a list of Activities that match this action/type.
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Intent baseIntent;
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// A HashMap of Activities the base intent will show in the chooser. This is used
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// to filter activities from other intents so that we don't show duplicates.
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HashMap<String, Intent> baseIntents = new HashMap<String, Intent>();
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// A list of other activities to shwo in the picker (and the intents to launch them).
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HashMap<String, Intent> intents = new HashMap<String, Intent> ();
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if ("audio/*".equals(mimeType)) {
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// For audio the only intent is the mimetype
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baseIntent = getIntent(mimeType);
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addActivities(baseIntent, baseIntents, null);
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} else if ("image/*".equals(mimeType)) {
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// For images the base is a capture intent
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baseIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
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baseIntent.putExtra(MediaStore.EXTRA_OUTPUT,
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Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
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fileHandler.generateImageName())));
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addActivities(baseIntent, baseIntents, null);
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// We also add the mimetype intent
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addActivities(getIntent(mimeType), intents, baseIntents);
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} else if ("video/*".equals(mimeType)) {
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// For videos the base is a capture intent
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baseIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
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addActivities(baseIntent, baseIntents, null);
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// We also add the mimetype intent
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addActivities(getIntent(mimeType), intents, baseIntents);
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} else {
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baseIntent = getIntent("*/*");
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addActivities(baseIntent, baseIntents, null);
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Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
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intent.putExtra(MediaStore.EXTRA_OUTPUT,
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Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
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fileHandler.generateImageName())));
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addActivities(intent, intents, baseIntents);
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intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
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addActivities(intent, intents, baseIntents);
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}
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// If we didn't find any activities, we fall back to the */* mimetype intent
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if (baseIntents.size() == 0 && intents.size() == 0) {
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intents.clear();
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baseIntent = getIntent("*/*");
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addActivities(baseIntent, baseIntents, null);
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}
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ArrayList<Intent> vals = new ArrayList<Intent>(intents.values());
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vals.add(0, baseIntent);
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return vals;
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}
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private String getFilePickerTitle(String mimeType) {
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if (mimeType.equals("audio/*")) {
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return context.getString(R.string.filepicker_audio_title);
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} else if (mimeType.equals("image/*")) {
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return context.getString(R.string.filepicker_image_title);
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} else if (mimeType.equals("video/*")) {
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return context.getString(R.string.filepicker_video_title);
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} else {
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return context.getString(R.string.filepicker_title);
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}
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}
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private interface IntentHandler {
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public void gotIntent(Intent intent);
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}
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/* Gets an intent that can open a particular mimetype. Will show a prompt with a list
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* of Activities that can handle the mietype. Asynchronously calls the handler when
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* one of the intents is selected. If the caller passes in null for the handler, will still
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* prompt for the activity, but will throw away the result.
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*/
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private void getFilePickerIntentAsync(String title,
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final String mimeType,
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final FilePickerResultHandler fileHandler,
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final IntentHandler handler) {
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List<Intent> intents = getIntentsForFilePicker(mimeType, fileHandler);
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if (intents.size() == 0) {
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Log.i(LOGTAG, "no activities for the file picker!");
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handler.gotIntent(null);
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return;
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}
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Intent base = intents.remove(0);
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if (intents.size() == 0) {
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handler.gotIntent(base);
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return;
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}
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if (TextUtils.isEmpty(title)) {
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title = getFilePickerTitle(mimeType);
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}
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Intent chooser = Intent.createChooser(base, title);
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chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, intents.toArray(new Parcelable[intents.size()]));
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handler.gotIntent(chooser);
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}
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/* Allows the user to pick an activity to load files from using a list prompt. Then opens the activity and
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* sends the file returned to the passed in handler. If a null handler is passed in, will still
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* pick and launch the file picker, but will throw away the result.
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*/
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protected void showFilePickerAsync(final String title, final String mimeType, final ResultHandler handler, final int tabId) {
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final FilePickerResultHandler fileHandler = new FilePickerResultHandler(handler, context, tabId);
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getFilePickerIntentAsync(title, mimeType, fileHandler, new IntentHandler() {
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@Override
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public void gotIntent(Intent intent) {
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if (handler == null) {
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return;
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}
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if (intent == null) {
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handler.gotFile("");
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return;
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}
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ActivityHandlerHelper.startIntent(intent, fileHandler);
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}
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});
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}
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}
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