Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/ntp/NewTabPageToolbar.java

+// 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.ntp;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.Gravity;
+import android.view.View;
+import android.view.View.OnLongClickListener;
+import android.view.ViewGroup;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import com.google.android.apps.chrome.R;
+
+import org.chromium.base.ApiCompatibilityUtils;
+import org.chromium.chrome.browser.widget.TintedDrawable;
+import org.chromium.ui.base.DeviceFormFactor;
+
+/**
+ * The toolbar at the bottom of the new tab page. Contains buttons to open the bookmarks and
+ * recent tabs pages.
+ */
+public class NewTabPageToolbar extends LinearLayout implements OnLongClickListener {
+
+    private View mBookmarksButton, mRecentTabsButton;
+    private Toast mToast;
+
+    /**
+     * Constructor for inflating from xml.
+     */
+    public NewTabPageToolbar(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public View getBookmarksButton() {
+        return mBookmarksButton;
+    }
+
+    public View getRecentTabsButton() {
+        return mRecentTabsButton;
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        mBookmarksButton = initButton(R.id.bookmarks_button, R.drawable.btn_star);
+        mRecentTabsButton = initButton(R.id.recent_tabs_button, R.drawable.btn_recents);
+    }
+
+    private View initButton(int buttonId, int drawableId) {
+        ViewGroup button = (ViewGroup) findViewById(buttonId);
+        TextView textView = (TextView) button.getChildAt(0);
+
+        TintedDrawable icon = TintedDrawable.constructTintedDrawable(getResources(), drawableId);
+        ApiCompatibilityUtils.setCompoundDrawablesRelativeWithIntrinsicBounds(
+                textView, icon, null, null, null);
+        if (!DeviceFormFactor.isTablet(getContext())) {
+            // On phones, no text is shown, but long pressing shows a tooltip.
+            textView.setText("");
+            textView.setCompoundDrawablePadding(0);
+            button.setOnLongClickListener(this);
+        }
+
+        return button;
+    }
+
+    @Override
+    public boolean onLongClick(View v) {
+        // Display tooltip on long click
+        if (v == mBookmarksButton) {
+            showTooltip(R.string.ntp_bookmarks);
+        } else if (v == mRecentTabsButton) {
+            showTooltip(R.string.recent_tabs);
+        }
+        return true;
+    }
+
+    /**
+     * Shows a tooltip for a button. If a tooltip is already showing, it will be hidden.
+     * @param stringId The string resource ID of the tooltip to be shown.
+     */
+    private void showTooltip(int stringId) {
+        if (mToast != null) mToast.cancel();
+        Context ctx = getContext();
+        mToast = Toast.makeText(ctx, ctx.getResources().getString(stringId), Toast.LENGTH_SHORT);
+        mToast.setGravity(Gravity.BOTTOM | Gravity.CENTER, 0, getHeight());
+        mToast.show();
+    }
+}