[Android] Add a transparent Activity in Chrome to handle Browser Action Intent

chrome/android/java/src/org/chromium/chrome/browser/browseractions/BrowserActionActivity.java

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.browseractions;
+
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.os.Bundle;
+import android.support.customtabs.browseractions.BrowserActionItem;
+import android.support.customtabs.browseractions.BrowserActionsIntent;
+
+import org.chromium.base.Log;
+import org.chromium.base.annotations.SuppressFBWarnings;
+import org.chromium.chrome.browser.IntentHandler;
+import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.browser.init.AsyncInitializationActivity;
+import org.chromium.chrome.browser.util.IntentUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A transparent {@link AsyncInitializationActivity} that displays the browser action context menu.
+ */
+public class BrowserActionActivity extends AsyncInitializationActivity {
+    private static final String TAG = "BrowserActions";
+
+    private int mType;
+    private Uri mUri;
+    private String mCreatorPackageName;
+    private List<BrowserActionItem> mActions = new ArrayList<>();
+
+    @Override
+    protected void setContentView() {
+        openContextMenu();
+    }
+
+    @Override
+    @SuppressFBWarnings("URF_UNREAD_FIELD")
+    protected boolean isStartedUpCorrectly(Intent intent) {
+        if (intent == null
+                || !BrowserActionsIntent.ACTION_BROWSER_ACTIONS_OPEN.equals(intent.getAction())) {
+            return false;
+        }
+        mUri = Uri.parse(IntentHandler.getUrlFromIntent(intent));
+        mType = IntentUtils.safeGetIntExtra(
+                intent, BrowserActionsIntent.EXTRA_TYPE, BrowserActionsIntent.URL_TYPE_NONE);
+        mCreatorPackageName = BrowserActionsIntent.getCreatorPackageName(intent);
+        ArrayList<Bundle> bundles = IntentUtils.getParcelableArrayListExtra(
+                intent, BrowserActionsIntent.EXTRA_MENU_ITEMS);
+        if (bundles != null) {
+            parseBrowserActionItems(bundles);
+        }
+        if (mUri == null) {
+            Log.e(TAG, "Missing url");
+            return false;
+        } else if (!UrlConstants.HTTP_SCHEME.equals(mUri.getScheme())
+                && !UrlConstants.HTTPS_SCHEME.equals(mUri.getScheme())) {
+            Log.e(TAG, "Url should only be HTTP or HTTPS scheme");
+            return false;
+        } else if (mCreatorPackageName == null) {
+            Log.e(TAG, "Missing creator's pacakge name");
+            return false;
+        } else if ((intent.getFlags() & Intent.FLAG_ACTIVITY_NEW_TASK) != 0) {
+            Log.e(TAG, "Intent should not be started with FLAG_ACTIVITY_NEW_TASK");
+            return false;
+        } else if ((intent.getFlags() & Intent.FLAG_ACTIVITY_NEW_DOCUMENT) != 0) {
+            Log.e(TAG, "Intent should not be started with FLAG_ACTIVITY_NEW_DOCUMENT");
+            return false;
+        } else {
+            return true;
+        }
+    }
+
+    /**
+     * Opens a Browser Actions context menu based on the parsed data.
+     */
+    public void openContextMenu() {
+        return;
+    }
+
+    @Override
+    protected boolean shouldDelayBrowserStartup() {
+        return true;
+    }
+
+    @Override
+    public boolean shouldStartGpuProcess() {
+        return true;
+    }
+
+    /**
+     * Gets custom item list for browser action menu.
+     * @param bundles Data for custom items from {@link BrowserActionsIntent}.
+     */
+    private void parseBrowserActionItems(ArrayList<Bundle> bundles) {
+        for (int i = 0; i < bundles.size(); i++) {
+            Bundle bundle = bundles.get(i);
+            String title = IntentUtils.safeGetString(bundle, BrowserActionsIntent.KEY_TITLE);
+            PendingIntent action =
+                    IntentUtils.safeGetParcelable(bundle, BrowserActionsIntent.KEY_ACTION);
+            Bitmap icon = IntentUtils.safeGetParcelable(bundle, BrowserActionsIntent.KEY_ICON);
+            if (title != null && action != null) {
+                BrowserActionItem item = new BrowserActionItem(title, action);
+                if (icon != null) {
+                    item.setIcon(icon);
+                }
+                mActions.add(item);
+            } else if (title != null) {
+                Log.e(TAG, "Missing action for item: " + i);
+            } else if (action != null) {
+                Log.e(TAG, "Missing title for item: " + i);
+            } else {
+                Log.e(TAG, "Missing title and action for item: " + i);
+            }
+        }
+    }
+
+    /**
+     * Callback when Browser Actions menu dialog is shown.
+     */
+    private void onMenuShown() {
+        beginLoadingLibrary();
+    }
+}