Add IME Switcher icon to Navigation Bar

Adds button in the same location as the menu button and overrides
it when present.  The setNavigationHintIconHints lets it know when
the button should be shown.

Bug: 14257632
Change-Id: Ia80de7fd2390cd8b083e37cbe58b7ee53555e619

12 files changed, 192 insertions, 67 deletions

diff --git a/core/java/android/app/StatusBarManager.java b/core/java/android/app/StatusBarManager.java
index 5cf61a8..ce5306f 100644
--- a/core/java/android/app/StatusBarManager.java
+++ b/core/java/android/app/StatusBarManager.java
@@ -60,6 +60,7 @@ public class StatusBarManager {
             | DISABLE_SEARCH;
 
     public static final int NAVIGATION_HINT_BACK_ALT      = 1 << 0;
+    public static final int NAVIGATION_HINT_IME_SHOWN     = 1 << 1;
 
     public static final int WINDOW_STATUS_BAR = 1;
     public static final int WINDOW_NAVIGATION_BAR = 2;
diff --git a/packages/SystemUI/res/drawable-hdpi/ic_ime_switcher_default.png b/packages/SystemUI/res/drawable-hdpi/ic_ime_switcher_default.png
new file mode 100644
index 0000000..369c88d
--- /dev/null
+++ b/packages/SystemUI/res/drawable-hdpi/ic_ime_switcher_default.png
diff --git a/packages/SystemUI/res/drawable-mdpi/ic_ime_switcher_default.png b/packages/SystemUI/res/drawable-mdpi/ic_ime_switcher_default.png
new file mode 100644
index 0000000..7d97eb5
--- /dev/null
+++ b/packages/SystemUI/res/drawable-mdpi/ic_ime_switcher_default.png
diff --git a/packages/SystemUI/res/drawable-xhdpi/ic_ime_switcher_default.png b/packages/SystemUI/res/drawable-xhdpi/ic_ime_switcher_default.png
new file mode 100644
index 0000000..900801a
--- /dev/null
+++ b/packages/SystemUI/res/drawable-xhdpi/ic_ime_switcher_default.png
diff --git a/packages/SystemUI/res/drawable-xxhdpi/ic_ime_switcher_default.png b/packages/SystemUI/res/drawable-xxhdpi/ic_ime_switcher_default.png
new file mode 100644
index 0000000..6c8222e
--- /dev/null
+++ b/packages/SystemUI/res/drawable-xxhdpi/ic_ime_switcher_default.png
diff --git a/packages/SystemUI/res/layout-ldrtl/navigation_bar.xml b/packages/SystemUI/res/layout-ldrtl/navigation_bar.xml
index aa7256b..5f12706 100644
--- a/packages/SystemUI/res/layout-ldrtl/navigation_bar.xml
+++ b/packages/SystemUI/res/layout-ldrtl/navigation_bar.xml
@@ -43,7 +43,7 @@
 
             <!-- navigation controls -->
             <View
-                android:layout_width="40dp"
+                android:layout_width="@dimen/navigation_extra_key_width"
                 android:layout_height="match_parent"
                 android:layout_weight="0"
                 android:visibility="invisible"
@@ -88,16 +88,29 @@
                 systemui:glowBackground="@drawable/ic_sysbar_highlight"
                 android:contentDescription="@string/accessibility_recent"
                 />
-            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
-                android:layout_width="@dimen/navigation_menu_key_width"
+            <FrameLayout
+                android:layout_width="@dimen/navigation_extra_key_width"
                 android:layout_height="match_parent"
-                android:src="@drawable/ic_sysbar_menu"
-                systemui:keyCode="82"
-                android:layout_weight="0"
-                android:visibility="invisible"
-                android:contentDescription="@string/accessibility_menu"
-                systemui:glowBackground="@drawable/ic_sysbar_highlight"
-                />
+                android:layout_weight="0" >
+                <com.android.systemui.statusbar.policy.KeyButtonView
+                    android:id="@+id/menu"
+                    android:layout_width="@dimen/navigation_extra_key_width"
+                    android:layout_height="match_parent"
+                    android:contentDescription="@string/accessibility_menu"
+                    android:src="@drawable/ic_sysbar_menu"
+                    android:visibility="invisible"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight"
+                    systemui:keyCode="82" />
+                <com.android.systemui.statusbar.policy.KeyButtonView
+                    android:id="@+id/ime_switcher"
+                    android:layout_width="@dimen/navigation_extra_key_width"
+                    android:layout_height="match_parent"
+                    android:contentDescription="@string/accessibility_ime_switch_button"
+                    android:scaleType="centerInside"
+                    android:src="@drawable/ic_ime_switcher_default"
+                    android:visibility="invisible"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight" />
+            </FrameLayout>
         </LinearLayout>
 
         <!-- lights out layout to match exactly -->
@@ -187,16 +200,29 @@
             >
             
             <!-- navigation controls -->
-            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
-                android:layout_height="40dp"
-                android:layout_width="match_parent"
-                android:src="@drawable/ic_sysbar_menu_land"
-                systemui:keyCode="82"
-                android:layout_weight="0"
-                android:visibility="invisible"
-                android:contentDescription="@string/accessibility_menu"
-                systemui:glowBackground="@drawable/ic_sysbar_highlight_land"
-                />
+            <FrameLayout
+                android:layout_width="@dimen/navigation_extra_key_width"
+                android:layout_height="match_parent"
+                android:layout_weight="0" >
+                <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
+                    android:layout_height="@dimen/navigation_extra_key_width"
+                    android:layout_width="match_parent"
+                    android:src="@drawable/ic_sysbar_menu_land"
+                    systemui:keyCode="82"
+                    android:layout_weight="0"
+                    android:visibility="invisible"
+                    android:contentDescription="@string/accessibility_menu"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight_land" />
+                <com.android.systemui.statusbar.policy.KeyButtonView
+                    android:id="@+id/ime_switcher"
+                    android:layout_height="@dimen/navigation_extra_key_width"
+                    android:layout_width="match_parent"
+                    android:contentDescription="@string/accessibility_ime_switch_button"
+                    android:scaleType="centerInside"
+                    android:src="@drawable/ic_ime_switcher_default"
+                    android:visibility="invisible"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight" />
+            </FrameLayout>
             <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/back"
                 android:layout_height="80dp"
                 android:layout_width="match_parent"
diff --git a/packages/SystemUI/res/layout-sw600dp/navigation_bar.xml b/packages/SystemUI/res/layout-sw600dp/navigation_bar.xml
index b9ad799..6a2e3c6 100644
--- a/packages/SystemUI/res/layout-sw600dp/navigation_bar.xml
+++ b/packages/SystemUI/res/layout-sw600dp/navigation_bar.xml
@@ -42,7 +42,7 @@
 
             <!-- navigation controls -->
             <View
-                android:layout_width="48dp"
+                android:layout_width="@dimen/navigation_extra_key_width"
                 android:layout_height="match_parent"
                 android:layout_weight="0"
                 android:layout_marginStart="2dp"
@@ -85,17 +85,32 @@
                 android:layout_height="match_parent"
                 android:layout_weight="1"
                 />
-            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
-                android:layout_width="48dp"
+            <FrameLayout
+                android:layout_width="@dimen/navigation_extra_key_width"
                 android:layout_height="match_parent"
-                android:src="@drawable/ic_sysbar_menu"
-                android:layout_marginEnd="2dp"
-                systemui:keyCode="82"
                 android:layout_weight="0"
-                android:visibility="invisible"
-                android:contentDescription="@string/accessibility_menu"
-                systemui:glowBackground="@drawable/ic_sysbar_highlight"
-                />
+                android:layout_marginEnd="2dp" >
+                <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
+                    android:layout_width="@dimen/navigation_extra_key_width"
+                    android:layout_height="match_parent"
+                    android:src="@drawable/ic_sysbar_menu"
+                    android:layout_marginEnd="2dp"
+                    systemui:keyCode="82"
+                    android:visibility="invisible"
+                    android:contentDescription="@string/accessibility_menu"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight"
+                    />
+                <com.android.systemui.statusbar.policy.KeyButtonView
+                    android:id="@+id/ime_switcher"
+                    android:layout_width="@dimen/navigation_extra_key_width"
+                    android:layout_height="match_parent"
+                    android:layout_marginEnd="2dp"
+                    android:scaleType="centerInside"
+                    android:src="@drawable/ic_ime_switcher_default"
+                    android:visibility="invisible"
+                    android:contentDescription="@string/accessibility_ime_switch_button"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight" />
+            </FrameLayout>
         </LinearLayout>
 
         <!-- lights out layout to match exactly -->
@@ -184,7 +199,7 @@
 
             <!-- navigation controls -->
             <View
-                android:layout_width="48dp"
+                android:layout_width="@dimen/navigation_extra_key_width"
                 android:layout_height="match_parent"
                 android:layout_weight="0"
                 android:layout_marginStart="2dp"
@@ -227,17 +242,32 @@
                 android:layout_height="match_parent"
                 android:layout_weight="1"
                 />
-            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
-                android:layout_width="48dp"
+            <FrameLayout
+                android:layout_width="@dimen/navigation_extra_key_width"
                 android:layout_height="match_parent"
                 android:layout_marginEnd="2dp"
-                android:src="@drawable/ic_sysbar_menu"
-                systemui:keyCode="82"
-                android:layout_weight="0"
-                android:visibility="invisible"
-                android:contentDescription="@string/accessibility_menu"
-                systemui:glowBackground="@drawable/ic_sysbar_highlight"
-                />
+                android:layout_weight="0" >
+                <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
+                    android:layout_width="@dimen/navigation_extra_key_width"
+                    android:layout_height="match_parent"
+                    android:layout_marginEnd="2dp"
+                    android:src="@drawable/ic_sysbar_menu"
+                    systemui:keyCode="82"
+                    android:visibility="invisible"
+                    android:contentDescription="@string/accessibility_menu"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight"
+                    />
+                <com.android.systemui.statusbar.policy.KeyButtonView
+                    android:id="@+id/ime_switcher"
+                    android:layout_width="@dimen/navigation_extra_key_width"
+                    android:layout_height="match_parent"
+                    android:layout_marginEnd="2dp"
+                    android:src="@drawable/ic_ime_switcher_default"
+                    android:visibility="invisible"
+                    android:contentDescription="@string/accessibility_ime_switch_button"
+                    android:scaleType="centerInside"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight" />
+            </FrameLayout>
         </LinearLayout>
 
         <!-- lights out layout to match exactly -->
diff --git a/packages/SystemUI/res/layout/navigation_bar.xml b/packages/SystemUI/res/layout/navigation_bar.xml
index 2398849..7470409 100644
--- a/packages/SystemUI/res/layout/navigation_bar.xml
+++ b/packages/SystemUI/res/layout/navigation_bar.xml
@@ -88,16 +88,31 @@
                 systemui:glowBackground="@drawable/ic_sysbar_highlight"
                 android:contentDescription="@string/accessibility_recent"
                 />
-            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
-                android:layout_width="@dimen/navigation_menu_key_width"
+            <FrameLayout
+                android:layout_width="@dimen/navigation_extra_key_width"
                 android:layout_height="match_parent"
-                android:src="@drawable/ic_sysbar_menu"
-                systemui:keyCode="82"
-                android:layout_weight="0"
-                android:visibility="invisible"
-                android:contentDescription="@string/accessibility_menu"
-                systemui:glowBackground="@drawable/ic_sysbar_highlight"
-                />
+                android:layout_weight="0" >
+                <com.android.systemui.statusbar.policy.KeyButtonView
+                    android:id="@+id/menu"
+                    android:layout_width="@dimen/navigation_extra_key_width"
+                    android:layout_height="match_parent"
+                    android:contentDescription="@string/accessibility_menu"
+                    android:src="@drawable/ic_sysbar_menu"
+                    android:visibility="invisible"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight"
+                    systemui:keyCode="82" />
+
+                <com.android.systemui.statusbar.policy.KeyButtonView
+                    android:id="@+id/ime_switcher"
+                    android:layout_width="@dimen/navigation_extra_key_width"
+                    android:layout_height="match_parent"
+                    android:contentDescription="@string/accessibility_ime_switch_button"
+                    android:scaleType="centerInside"
+                    android:src="@drawable/ic_ime_switcher_default"
+                    android:visibility="invisible"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight" />
+            </FrameLayout>
+
         </LinearLayout>
 
         <!-- lights out layout to match exactly -->
@@ -190,18 +205,33 @@
             android:id="@+id/nav_buttons"
             android:animateLayoutChanges="true"
             >
-            
+
             <!-- navigation controls -->
-            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"
-                android:layout_height="40dp"
-                android:layout_width="match_parent"
-                android:src="@drawable/ic_sysbar_menu_land"
-                systemui:keyCode="82"
+            <FrameLayout
                 android:layout_weight="0"
-                android:visibility="invisible"
-                android:contentDescription="@string/accessibility_menu"
-                systemui:glowBackground="@drawable/ic_sysbar_highlight_land"
-                />
+                android:layout_width="match_parent"
+                android:layout_height="40dp" >
+                <com.android.systemui.statusbar.policy.KeyButtonView
+                    android:id="@+id/ime_switcher"
+                    android:layout_width="match_parent"
+                    android:layout_height="40dp"
+                    android:contentDescription="@string/accessibility_ime_switch_button"
+                    android:scaleType="centerInside"
+                    android:src="@drawable/ic_ime_switcher_default"
+                    android:visibility="invisible"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight" />
+
+                <com.android.systemui.statusbar.policy.KeyButtonView
+                    android:id="@+id/menu"
+                    android:layout_width="match_parent"
+                    android:layout_height="40dp"
+                    android:contentDescription="@string/accessibility_menu"
+                    android:src="@drawable/ic_sysbar_menu_land"
+                    android:visibility="invisible"
+                    systemui:glowBackground="@drawable/ic_sysbar_highlight_land"
+                    systemui:keyCode="82" />
+            </FrameLayout>
+
             <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/recent_apps"
                 android:layout_height="80dp"
                 android:layout_width="match_parent"
diff --git a/packages/SystemUI/res/values-sw600dp/dimens.xml b/packages/SystemUI/res/values-sw600dp/dimens.xml
index 5b5587d..92e3885 100644
--- a/packages/SystemUI/res/values-sw600dp/dimens.xml
+++ b/packages/SystemUI/res/values-sw600dp/dimens.xml
@@ -36,6 +36,9 @@
     <!-- Height of search panel including navigation bar height -->
     <dimen name="navbar_search_panel_height">280dip</dimen>
 
+    <!-- The width of the view containing the menu/ime navigation bar icons -->
+    <dimen name="navigation_extra_key_width">48dip</dimen>
+
     <!-- Size of application thumbnail -->
     <dimen name="status_bar_recents_thumbnail_width">200dp</dimen>
     <dimen name="status_bar_recents_thumbnail_height">177dp</dimen>
diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index 176879e..aadeebe 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -128,8 +128,8 @@
     <!-- The width of the view containing non-menu status bar icons -->
     <dimen name="navigation_key_width">80dip</dimen>
 
-    <!-- The width of the view containing the menu status bar icon -->
-    <dimen name="navigation_menu_key_width">40dip</dimen>
+    <!-- The width of the view containing the menu/ime navigation bar icons -->
+    <dimen name="navigation_extra_key_width">40dip</dimen>
 
     <!-- Default distance beyond which snaps to the matching target -->
     <dimen name="navbar_search_snap_margin">40dip</dimen>
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
index 3fae3f0..089757a 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
@@ -39,6 +39,7 @@ import android.view.ViewGroup;
 import android.view.WindowManager;
 import android.view.accessibility.AccessibilityManager;
 import android.view.accessibility.AccessibilityManager.TouchExplorationStateChangeListener;
+import android.view.inputmethod.InputMethodManager;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 
@@ -142,6 +143,14 @@ public class NavigationBarView extends LinearLayout {
         }
     };
 
+    private final OnClickListener mImeSwitcherClickListener = new OnClickListener() {
+        @Override
+        public void onClick(View view) {
+            ((InputMethodManager) mContext.getSystemService(Context.INPUT_METHOD_SERVICE))
+                    .showInputMethodPicker();
+        }
+    };
+
     private class H extends Handler {
         public void handleMessage(Message m) {
             switch (m.what) {
@@ -233,6 +242,10 @@ public class NavigationBarView extends LinearLayout {
         return mCurrentView.findViewById(R.id.home);
     }
 
+    public View getImeSwitchButton() {
+        return mCurrentView.findViewById(R.id.ime_switcher);
+    }
+
     // for when home is disabled, but search isn't
     public View getSearchLight() {
         return mCurrentView.findViewById(R.id.search_light);
@@ -283,6 +296,12 @@ public class NavigationBarView extends LinearLayout {
 
         ((ImageView)getRecentsButton()).setImageDrawable(mVertical ? mRecentLandIcon : mRecentIcon);
 
+        final boolean showImeButton = ((hints & StatusBarManager.NAVIGATION_HINT_IME_SHOWN) != 0);
+        getImeSwitchButton().setVisibility(showImeButton ? View.VISIBLE : View.INVISIBLE);
+        // Update menu button in case the IME state has changed.
+        setMenuVisibility(mShowMenu, true);
+
+
         setDisabledFlags(mDisabledFlags, true);
     }
 
@@ -363,7 +382,10 @@ public class NavigationBarView extends LinearLayout {
 
         mShowMenu = show;
 
-        getMenuButton().setVisibility(mShowMenu ? View.VISIBLE : View.INVISIBLE);
+        // Only show Menu if IME switcher not shown.
+        final boolean shouldShow = mShowMenu &&
+                ((mNavigationIconHints & StatusBarManager.NAVIGATION_HINT_IME_SHOWN) == 0);
+        getMenuButton().setVisibility(shouldShow ? View.VISIBLE : View.INVISIBLE);
     }
 
     @Override
@@ -379,6 +401,8 @@ public class NavigationBarView extends LinearLayout {
 
         mCurrentView = mRotatedViews[Surface.ROTATION_0];
 
+        getImeSwitchButton().setOnClickListener(mImeSwitcherClickListener);
+
         watchForAccessibilityChanges();
     }
 
@@ -424,6 +448,8 @@ public class NavigationBarView extends LinearLayout {
         mCurrentView = mRotatedViews[rot];
         mCurrentView.setVisibility(View.VISIBLE);
 
+        getImeSwitchButton().setOnClickListener(mImeSwitcherClickListener);
+
         mDeadZone = (DeadZone) mCurrentView.findViewById(R.id.deadzone);
 
         // force the low profile & disabled states into compliance
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index 545352c..e154b24 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -18,6 +18,7 @@ package com.android.systemui.statusbar.phone;
 
 
 import static android.app.StatusBarManager.NAVIGATION_HINT_BACK_ALT;
+import static android.app.StatusBarManager.NAVIGATION_HINT_IME_SHOWN;
 import static android.app.StatusBarManager.WINDOW_STATE_HIDDEN;
 import static android.app.StatusBarManager.WINDOW_STATE_SHOWING;
 import static android.app.StatusBarManager.windowStateToString;
@@ -2211,12 +2212,20 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode {
 
     @Override
     public void setImeWindowStatus(IBinder token, int vis, int backDisposition) {
-        boolean altBack = (backDisposition == InputMethodService.BACK_DISPOSITION_WILL_DISMISS)
-            || ((vis & InputMethodService.IME_VISIBLE) != 0);
+        boolean imeShown = (vis & InputMethodService.IME_VISIBLE) != 0;
+        int flags = mNavigationIconHints;
+        if ((backDisposition == InputMethodService.BACK_DISPOSITION_WILL_DISMISS) || imeShown) {
+            flags |= NAVIGATION_HINT_BACK_ALT;
+        } else {
+            flags &= ~NAVIGATION_HINT_BACK_ALT;
+        }
+        if (imeShown) {
+            flags |= NAVIGATION_HINT_IME_SHOWN;
+        } else {
+            flags &= ~NAVIGATION_HINT_IME_SHOWN;
+        }
 
-        setNavigationIconHints(
-                altBack ? (mNavigationIconHints | NAVIGATION_HINT_BACK_ALT)
-                        : (mNavigationIconHints & ~NAVIGATION_HINT_BACK_ALT));
+        setNavigationIconHints(flags);
         if (mQS != null) mQS.setImeWindowStatus(vis > 0);
     }