Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/snackbar/SnackbarPopupWindow.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.snackbar;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.PopupWindow;
+import android.widget.TextView;
+
+import com.google.android.apps.chrome.R;
+
+import org.chromium.ui.base.DeviceFormFactor;
+
+/**
+ * Visual representation of a snackbar. On phone it has weight the same as entire activity, on
+ * tablet it has a fixed width anchored at start-bottom corner of current window.
+ */
+public class SnackbarPopupWindow extends PopupWindow {
+    private final TemplatePreservingTextView mMessageView;
+    private final TextView mActionButtonView;
+    private final int mAnimationDuration;
+
+    /**
+     * Creates an instance of the {@link SnackbarPopupWindow}.
+     * @param parent Parent View the popup window anchors to
+     * @param listener An {@link OnClickListener} that will be called when the undo button is
+     *                 clicked.
+     * @param template Format String to display on popup (e.g. "Closed %s").
+     * @param description Text showing at start of snackbar.
+     * @param actionText Text of action button at the end of snackbar.
+     */
+    public SnackbarPopupWindow(View parent, OnClickListener listener, String template,
+            String description, String actionText) {
+        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.snack_bar, null);
+        setContentView(view);
+        mMessageView = (TemplatePreservingTextView) view.findViewById(R.id.undobar_message);
+        mActionButtonView = (TextView) view.findViewById(R.id.undobar_button);
+        setTextViews(template, description, actionText, false);
+        mAnimationDuration = view.getResources().getInteger(
+                android.R.integer.config_mediumAnimTime);
+        mActionButtonView.setOnClickListener(listener);
+
+        // Set width and height of popup window
+        boolean isTablet = DeviceFormFactor.isTablet(parent.getContext());
+        setWidth(isTablet
+                ? parent.getResources().getDimensionPixelSize(R.dimen.undo_bar_tablet_width)
+                : parent.getWidth());
+
+        setHeight(parent.getResources().getDimensionPixelSize(R.dimen.undo_bar_height));
+        setAnimationStyle(R.style.SnackbarAnimation);
+    }
+
+    @Override
+    public void dismiss() {
+        // Disable action button during animation.
+        mActionButtonView.setEnabled(false);
+        super.dismiss();
+    }
+
+    /**
+     * Sets the text of TextViews in snackbar. If this popup bar is already visible it
+     * will animate the new text alpha, otherwise it will only set the text.
+     * @param template Template that description textview takes to format string.
+     * @param description The content text of that show at start of snackbar.
+     * @param actionText Text for action button to show.
+     * @param animate Whether or not to animate the text in or set it.
+     */
+    public void setTextViews(String template, String description, String actionText,
+            boolean animate) {
+        mMessageView.setTemplate(template);
+        setViewText(mMessageView, description, animate);
+        setViewText(mActionButtonView, actionText, animate);
+    }
+
+    private void setViewText(TextView view, String text, boolean animate) {
+        if (view.getText().toString().equals(text)) return;
+        view.animate().cancel();
+        if (animate) {
+            view.setAlpha(0.0f);
+            view.setText(text);
+            view.animate().alpha(1.f).setDuration(mAnimationDuration).setListener(null);
+        } else {
+            view.setText(text);
+        }
+    }
+
+    /**
+     * Sends an accessibility event to mMessageView announcing that this window was added so that
+     * the mMessageView content description is read aloud if accessibility is enabled.
+     */
+    public void announceforAccessibility() {
+        mMessageView.announceForAccessibility(mMessageView.getContentDescription());
+    }
+}