[Custom Tabs] Implement Bottombar

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

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
index 6029bb2d19e6d1f6384bc1e7a455c1b5427fb40b..e4c24b8e33ea1af5a432c595bfbbdeb94a58c7f2 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabActivity.java
@@ -16,7 +16,9 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.ViewGroup;
+import android.view.ViewStub;
 import android.view.Window;
+import android.widget.ImageButton;
 
 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.Log;
@@ -46,6 +48,8 @@ import org.chromium.chrome.browser.tabmodel.TabModelSelectorImpl;
 import org.chromium.chrome.browser.toolbar.ToolbarControlContainer;
 import org.chromium.chrome.browser.util.ColorUtils;
 import org.chromium.chrome.browser.util.IntentUtils;
+import org.chromium.chrome.browser.widget.FadingShadow;
+import org.chromium.chrome.browser.widget.FadingShadowView;
 import org.chromium.chrome.browser.widget.findinpage.FindToolbarManager;
 import org.chromium.components.dom_distiller.core.DomDistillerUrlUtils;
 import org.chromium.content_public.browser.LoadUrlParams;
@@ -53,6 +57,8 @@ import org.chromium.content_public.browser.WebContents;
 import org.chromium.content_public.common.Referrer;
 import org.chromium.ui.base.PageTransition;
 
+import java.util.List;
+
 /**
  * The activity for custom tabs. It will be launched on top of a client's task.
  */
@@ -175,7 +181,7 @@ public class CustomTabActivity extends ChromeActivity {
         setTabModelSelector(new TabModelSelectorImpl(this, 0, getWindowAndroid(), false));
         getToolbarManager().setCloseButtonDrawable(mIntentDataProvider.getCloseButtonDrawable());
         getToolbarManager().setShowTitle(mIntentDataProvider.getTitleVisibilityState()
-                == CustomTabIntentDataProvider.SHOW_PAGE_TITLE);
+                == CustomTabsIntent.SHOW_PAGE_TITLE);
         int toolbarColor = mIntentDataProvider.getToolbarColor();
         getToolbarManager().updatePrimaryColor(toolbarColor);
         if (toolbarColor != ApiCompatibilityUtils.getColor(
@@ -187,6 +193,7 @@ public class CustomTabActivity extends ChromeActivity {
         // Setting task title and icon to be null will preserve the client app's title and icon.
         ApiCompatibilityUtils.setTaskDescription(this, null, null, toolbarColor);
         showActionButton();
+        showBottombarIfNecessary();
     }
 
     @Override
@@ -435,7 +442,7 @@ public class CustomTabActivity extends ChromeActivity {
      */
     private boolean showActionButton() {
         if (!mIntentDataProvider.shouldShowActionButton()) return false;
-        ActionButtonParams params = mIntentDataProvider.getActionButtonParams();
+        ButtonParams params = mIntentDataProvider.getActionButtonParams();
         getToolbarManager().setCustomActionButton(
                 params.getIcon(getResources()),
                 params.getDescription(),
@@ -450,6 +457,31 @@ public class CustomTabActivity extends ChromeActivity {
         return true;
     }
 
+    /**
+     * Inflates the bottom bar {@link ViewStub} and its shadow, and populates it with items.
+     */
+    private void showBottombarIfNecessary() {
+        if (!mIntentDataProvider.shouldShowBottomBar()) return;
+
+        ViewStub bottombarStub = ((ViewStub) findViewById(R.id.buttombar_stub));
+        bottombarStub.setLayoutResource(R.layout.custom_tabs_bottombar);
+        bottombarStub.inflate();
+
+        // Unlike others, this shadow docks itself at bottom and casts graphics upwards.
+        FadingShadowView shadow = (FadingShadowView) findViewById(R.id.bottombar_shadow);
+        shadow.setVisibility(View.VISIBLE);
+        shadow.init(ApiCompatibilityUtils.getColor(getResources(),
+                R.color.toolbar_shadow_color), FadingShadow.POSITION_BOTTOM);
+
+        ViewGroup bottomBar = (ViewGroup) findViewById(R.id.bottombar);
+        bottomBar.setBackgroundColor(mIntentDataProvider.getBottomBarColor());
+        List<BottombarItemParams> items = mIntentDataProvider.getBottomBarItems();
+        for (BottombarItemParams params : items) {
+            ImageButton button = params.toImageButton(this, bottomBar);
+            bottomBar.addView(button);
+        }
+    }
+
     @Override
     public boolean shouldShowAppMenu() {
         return getActivityTab() != null && getToolbarManager().isInitialized();