Upstream accessibility tab switcher and related resources.

chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelWrapper.java

Index: chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelWrapper.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelWrapper.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelWrapper.java
new file mode 100644
index 0000000000000000000000000000000000000000..042c92b039add94d5dbf0508d9705b82961bcba5
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelWrapper.java
@@ -0,0 +1,166 @@
+// Copyright 2014 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.widget.accessibility;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.ImageButton;
+import android.widget.LinearLayout;
+import android.widget.ListView;
+
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.tabmodel.TabModelSelector;
+import org.chromium.chrome.browser.widget.accessibility.AccessibilityTabModelAdapter.AccessibilityTabModelAdapterListener;
+
+/**
+ * A wrapper around the Android views in the Accessibility tab switcher. This
+ * will show two {@link ListView}s, one for each
+ * {@link org.chromium.chrome.browser.tabmodel.TabModel} to
+ * represent.
+ */
+public class AccessibilityTabModelWrapper extends LinearLayout {
+    private AccessibilityTabModelListView mAccessibilityView;
+    private LinearLayout mStackButtonWrapper;
+    private ImageButton mStandardButton;
+    private ImageButton mIncognitoButton;
+
+    private TabModelSelector mTabModelSelector;
+    private TabModelSelector.ChangeListener mTabModelChangeListener =
+            new TabModelSelector.ChangeListener() {
+
+        @Override
+        public void onChange() {
+            getAdapter().notifyDataSetChanged();
+        }
+
+        @Override
+        public void onNewTabCreated(Tab tab) {
+        }
+    };
+
+    // TODO(bauerb): Use View#isAttachedToWindow() as soon as we are guaranteed
+    // to run against API version 19.
+    private boolean mIsAttachedToWindow;
+
+    private class ButtonOnClickListener implements View.OnClickListener {
+        private final boolean mIncognito;
+
+        public ButtonOnClickListener(boolean incognito) {
+            mIncognito = incognito;
+        }
+
+        @Override
+        public void onClick(View v) {
+            if (mTabModelSelector != null) {
+                if (mIncognito != mTabModelSelector.isIncognitoSelected()) {
+                    mTabModelSelector.commitAllTabClosures();
+                    mTabModelSelector.selectModel(mIncognito);
+                    setStateBasedOnModel();
+                }
+            }
+        }
+    }
+
+    public AccessibilityTabModelWrapper(Context context) {
+        super(context);
+    }
+
+    public AccessibilityTabModelWrapper(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public AccessibilityTabModelWrapper(Context context, AttributeSet attrs,
+            int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    /**
+     * Initialize android views after creation.
+     *
+     * @param listener A {@link AccessibilityTabModelAdapterListener} to pass tab events back to the
+     *                 parent.
+     */
+    public void setup(AccessibilityTabModelAdapterListener listener) {
+        mStackButtonWrapper = (LinearLayout) findViewById(R.id.button_wrapper);
+
+        mStandardButton = (ImageButton) findViewById(R.id.standard_tabs_button);
+        mStandardButton.setOnClickListener(new ButtonOnClickListener(false));
+
+        mIncognitoButton = (ImageButton) findViewById(R.id.incognito_tabs_button);
+        mIncognitoButton.setOnClickListener(new ButtonOnClickListener(true));
+
+        mAccessibilityView = (AccessibilityTabModelListView) findViewById(R.id.list_view);
+
+        AccessibilityTabModelAdapter adapter = getAdapter();
+
+        adapter.setListener(listener);
+    }
+
+    /**
+     * @param modelSelector A {@link TabModelSelector} to provide information
+     *            about open tabs.
+     */
+    public void setTabModelSelector(TabModelSelector modelSelector) {
+        if (mIsAttachedToWindow) {
+            mTabModelSelector.unregisterChangeListener(mTabModelChangeListener);
+        }
+        mTabModelSelector = modelSelector;
+        if (mIsAttachedToWindow) {
+            modelSelector.registerChangeListener(mTabModelChangeListener);
+        }
+        setStateBasedOnModel();
+    }
+
+    /**
+     * Set the bottom model selector buttons and list view contents based on the
+     * TabModelSelector.
+     */
+    public void setStateBasedOnModel() {
+        if (mTabModelSelector == null) return;
+
+        boolean incognitoEnabled =
+                mTabModelSelector.getModel(true).getComprehensiveModel().getCount() > 0;
+
+        boolean incognitoSelected = mTabModelSelector.isIncognitoSelected();
+
+        if (incognitoEnabled) {
+            mStackButtonWrapper.setVisibility(View.VISIBLE);
+        } else {
+            mStackButtonWrapper.setVisibility(View.GONE);
+        }
+
+        if (incognitoSelected) {
+            mIncognitoButton.setBackgroundResource(
+                    R.drawable.ntp_toolbar_button_background_selected);
+            mStandardButton.setBackgroundResource(R.drawable.ntp_toolbar_button_background);
+        } else {
+            mIncognitoButton.setBackgroundResource(R.drawable.ntp_toolbar_button_background);
+            mStandardButton.setBackgroundResource(
+                    R.drawable.ntp_toolbar_button_background_selected);
+        }
+
+        getAdapter().setTabModel(mTabModelSelector.getModel(incognitoSelected));
+    }
+
+    private AccessibilityTabModelAdapter getAdapter() {
+        return (AccessibilityTabModelAdapter) mAccessibilityView.getAdapter();
+    }
+
+    @Override
+    protected void onAttachedToWindow() {
+        mTabModelSelector.registerChangeListener(mTabModelChangeListener);
+        mIsAttachedToWindow = true;
+        super.onAttachedToWindow();
+    }
+
+    @Override
+    protected void onDetachedFromWindow() {
+        mTabModelSelector.unregisterChangeListener(mTabModelChangeListener);
+        mIsAttachedToWindow = false;
+        super.onDetachedFromWindow();
+    }
+}