🏠 Reader Mode info bar implementation

chrome/android/java/src/org/chromium/chrome/browser/infobar/ReaderModeInfoBar.java

Index: chrome/android/java/src/org/chromium/chrome/browser/infobar/ReaderModeInfoBar.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/infobar/ReaderModeInfoBar.java b/chrome/android/java/src/org/chromium/chrome/browser/infobar/ReaderModeInfoBar.java
new file mode 100644
index 0000000000000000000000000000000000000000..23e115f2a52abf5b5c1cba05939f8efc06fbd396
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/infobar/ReaderModeInfoBar.java
@@ -0,0 +1,84 @@
+// 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.infobar;
+
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.TextView;
+
+import org.chromium.base.ApiCompatibilityUtils;
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.dom_distiller.ReaderModeManager;
+import org.chromium.chrome.browser.tab.Tab;
+
+/**
+ * This is the InfoBar implementation of the Reader Mode UI. This is used in place of the
+ * {@link OverlayPanel} implementation when Chrome Home is enabled.
+ */
+public class ReaderModeInfoBar extends InfoBar {
+    /** A handle to the {@link ReaderModeManager} to trigger page navigations. */
+    private static ReaderModeManager sManager;
+
+    /**
+     * Default constructor.
+     */
+    private ReaderModeInfoBar() {
+        super(R.drawable.infobar_mobile_friendly, null, null);
+    }
+
+    @Override
+    protected boolean usesCompactLayout() {
+        return true;
+    }
+
+    @Override
+    protected void createCompactLayoutContent(InfoBarCompactLayout layout) {
+        TextView prompt = new TextView(getContext());
+        prompt.setText(R.string.reader_view_text);
+        prompt.setSingleLine();
+        prompt.setTextSize(TypedValue.COMPLEX_UNIT_PX,
+                getContext().getResources().getDimension(R.dimen.infobar_text_size));
+        prompt.setTextColor(
+                ApiCompatibilityUtils.getColor(layout.getResources(), R.color.default_text_color));
+        prompt.setGravity(Gravity.CENTER_VERTICAL);
+
+        prompt.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                // TODO(mdjones): Trigger navigation from manager.
+            }
+        });
+
+        layout.addContent(prompt, 1f);
+    }
+
+    public void onCloseButtonClicked() {
+        super.onCloseButtonClicked();
+
+        // TODO(mdjones): Notifiy the manager that the infobar was closed.
+    }
+
+    /**
+     * Create and show the Reader Mode {@link InfoBar}.
+     * @param tab The tab that the {@link InfoBar} should be shown in.
+     * @param manager The {@link ReaderModeManager} for this instance of Chrome.
+     */
+    public static void showReaderModeInfoBar(Tab tab, ReaderModeManager manager) {
+        sManager = manager;
+        nativeCreate(tab);
+    }
+
+    /**
+     * @return An instance of the {@link ReaderModeInfoBar}.
+     */
+    @CalledByNative
+    private static ReaderModeInfoBar create() {
+        return new ReaderModeInfoBar();
+    }
+
+    private static native void nativeCreate(Tab tab);
+}