[Custom Tabs] Implement Bottombar

chrome/android/java/src/org/chromium/chrome/browser/customtabs/BottombarItemParams.java

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/BottombarItemParams.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/BottombarItemParams.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/BottombarItemParams.java
new file mode 100644
index 0000000000000000000000000000000000000000..7c2a70e536015ad9a436a7f0544ca5de526a4e19
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/BottombarItemParams.java
@@ -0,0 +1,139 @@
+// Copyright 2015 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.customtabs;
+
+import android.app.PendingIntent;
+import android.app.PendingIntent.CanceledException;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.os.Bundle;
+import android.support.customtabs.CustomTabsIntent;
+import android.text.TextUtils;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageButton;
+
+import org.chromium.base.Log;
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.util.IntentUtils;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * A collection of data associated with an item on the bottombar.
+ */
+public class BottombarItemParams extends ButtonParams {

[Ian Wen, 2016/01/02 14:20:39]

This should have been package protected. Fixed locally.

+
+    private int mId;
+
+    private BottombarItemParams(int id, Bitmap icon, String description,
+            PendingIntent pendingIntent) {
+        super(icon, description, pendingIntent);
+        mId = id;
+    }
+
+    /**
+     * @return The id of this item, specified by the client.
+     */
+    int getId() {
+        return mId;
+    }
+
+    /**
+     * Inflates an {@link ImageButton} using data provided by the item params.
+     * @param parent The parent that the inflated {@link ImageButton} will be added to.
+     * @return The inflated {@link ImageButton}
+     */
+    ImageButton toImageButton(Context context, ViewGroup parent) {
+        ImageButton button = (ImageButton) LayoutInflater.from(context)
+                .inflate(R.layout.custom_tabs_bottombar_item, parent, false);
+        button.setImageBitmap(mIcon);
+        button.setContentDescription(mDescription);
+        if (mPendingIntent == null) {
+            button.setEnabled(false);
+        } else {
+            // TODO(ianwen): add UMA for botton clicking.
+            button.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    try {
+                        mPendingIntent.send();
+                    } catch (CanceledException e) {
+                        Log.e(TAG, "CanceledException while sending pending intent in custom tab");
+                    }
+                }
+            });
+        }
+        return button;
+    }
+
+    /**
+     * Parses the given {@link Intent} sent by the client. If there are multiple items with the same
+     * id, only the first item will be displayed.
+     * @return The parsed {@link BottombarItemParams}s. Returns an empty list if input is invalid.
+     */
+    static List<BottombarItemParams> fromIntent(Context context, Intent intent) {
+        List<BottombarItemParams> items = new ArrayList<>();
+        List<Bundle> bottomBundles = IntentUtils.getParcelableArrayListExtra(intent,
+                CustomTabsIntent.EXTRA_BOTTOM_BAR_ITEMS);
+
+        Set<Integer> ids = new HashSet<>();
+        if (bottomBundles != null) {
+            for (Bundle bundle : bottomBundles) {
+                BottombarItemParams params = BottombarItemParams.fromBundle(context, bundle);
+                if (params == null) {
+                    continue;
+                } else if (ids.contains(params.getId())) {
+                    Log.e(TAG, "Bottom bar items contain duplicate id: " + params.getId());
+                    continue;
+                }
+                ids.add(params.getId());
+                items.add(params);
+            }
+        }
+        return items;
+    }
+
+    /**
+     * Parses an {@link BottombarItemParams} from a button bundle sent by clients.
+     * @param bundle A bundle contained in {@link CustomTabsIntent#EXTRA_BOTTOM_BAR_ITEMS}
+     * @return The parsed {@link ButtonParams}. Return null if input is invalid.
+     */
+    private static BottombarItemParams fromBundle(Context context, Bundle bundle) {
+        if (bundle == null) return null;
+
+        int id = 0;
+        if (bundle.containsKey(CustomTabsIntent.KEY_ID)) {
+            id = IntentUtils.safeGetInt(bundle, CustomTabsIntent.KEY_ID, 0);
+        } else {
+            Log.e(TAG, "Invalid bottom bar item: id not specified in bundle!");
+            return null;
+        }
+
+        Bitmap bitmap = tryParseBitmapFromBundle(context, bundle);
+        if (bitmap == null) {
+            Log.e(TAG, "Invalid bottom bar item: bitmap not present in bundle!");
+            return null;
+        }
+
+        String description = tryParseDescriptionFromBundle(bundle);
+        if (TextUtils.isEmpty(description)) {
+            Log.e(TAG, "Invalid bottom bar item: content description not present in bundle!");
+            bitmap.recycle();
+            return null;
+        }
+
+        // PendingIntent is optional when customizing the bottombar.
+        PendingIntent pi = IntentUtils.safeGetParcelable(bundle,
+                CustomTabsIntent.KEY_PENDING_INTENT);
+        return new BottombarItemParams(id, bitmap, description, pi);
+    }
+
+}