Handle config changes in Launcher

- This is practically a revert to http://ag/c/13687966/5 and refactored to use DisplayController.DisplayInfoChangeListener
- Make Launcher handle size and density change so transition is less janky when screen size changes
- Added fix in RecentsView to update state and TaskView when display profile changes
- Removed 720dp specific resoureces
- Removed unused widget_section_indent
- Removed unnecessary all_apps_background_canvas 600dp override that is not needed in AllApps+
- Moved remaining dp specific into DeviceProfile
- Simplified allowRotation logic to use single variable in DeviceProfile to determine if allow rotation is enabled by default

Fixes: 180803696
Test: manual
Change-Id: Iea0a7d1a0e14dc3613152dd3b3887450a2e1fc2f
diff --git a/quickstep/AndroidManifest-launcher.xml b/quickstep/AndroidManifest-launcher.xml
index 7fe9b08..6808222 100644
--- a/quickstep/AndroidManifest-launcher.xml
+++ b/quickstep/AndroidManifest-launcher.xml
@@ -49,7 +49,7 @@
             android:stateNotNeeded="true"
             android:windowSoftInputMode="adjustPan"
             android:screenOrientation="unspecified"
-            android:configChanges="keyboard|keyboardHidden|mcc|mnc|navigation|orientation|screenSize|screenLayout"
+            android:configChanges="keyboard|keyboardHidden|mcc|mnc|navigation|orientation|screenSize|screenLayout|smallestScreenSize|density"
             android:resizeableActivity="true"
             android:resumeWhilePausing="true"
             android:taskAffinity=""
diff --git a/quickstep/AndroidManifest.xml b/quickstep/AndroidManifest.xml
index 7ab09c5..bf9059f 100644
--- a/quickstep/AndroidManifest.xml
+++ b/quickstep/AndroidManifest.xml
@@ -71,7 +71,7 @@
              android:stateNotNeeded="true"
              android:theme="@style/LauncherTheme"
              android:screenOrientation="unspecified"
-             android:configChanges="keyboard|keyboardHidden|mcc|mnc|navigation|orientation|screenSize|screenLayout"
+             android:configChanges="keyboard|keyboardHidden|mcc|mnc|navigation|orientation|screenSize|screenLayout|smallestScreenSize|density"
              android:resizeableActivity="true"
              android:resumeWhilePausing="true"
              android:taskAffinity=""/>
diff --git a/quickstep/res/xml/indexable_launcher_prefs.xml b/quickstep/res/xml/indexable_launcher_prefs.xml
index c7e864f..b4740e5 100644
--- a/quickstep/res/xml/indexable_launcher_prefs.xml
+++ b/quickstep/res/xml/indexable_launcher_prefs.xml
@@ -26,7 +26,7 @@
         android:key="pref_allowRotation"
         android:title="@string/allow_rotation_title"
         android:summary="@string/allow_rotation_desc"
-        android:defaultValue="@bool/allow_rotation"
+        android:defaultValue="false"
         android:persistent="true" />
 
 </PreferenceScreen>
diff --git a/quickstep/src/com/android/quickstep/util/RecentsOrientedState.java b/quickstep/src/com/android/quickstep/util/RecentsOrientedState.java
index d164c8c..e983f46 100644
--- a/quickstep/src/com/android/quickstep/util/RecentsOrientedState.java
+++ b/quickstep/src/com/android/quickstep/util/RecentsOrientedState.java
@@ -16,7 +16,6 @@
 
 package com.android.quickstep.util;
 
-import static android.util.DisplayMetrics.DENSITY_DEVICE_STABLE;
 import static android.view.OrientationEventListener.ORIENTATION_UNKNOWN;
 import static android.view.Surface.ROTATION_0;
 import static android.view.Surface.ROTATION_180;
@@ -31,7 +30,6 @@
 
 import android.content.Context;
 import android.content.SharedPreferences;
-import android.content.res.Resources;
 import android.graphics.Matrix;
 import android.graphics.Point;
 import android.graphics.PointF;
@@ -46,7 +44,6 @@
 
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.InvariantDeviceProfile;
-import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.touch.PagedOrientationHandler;
@@ -67,7 +64,8 @@
  * This class has initial default state assuming the device and foreground app have
  * no ({@link Surface#ROTATION_0} rotation.
  */
-public final class RecentsOrientedState implements SharedPreferences.OnSharedPreferenceChangeListener {
+public final class RecentsOrientedState implements
+        SharedPreferences.OnSharedPreferenceChangeListener {
 
     private static final String TAG = "RecentsOrientedState";
     private static final boolean DEBUG = false;
@@ -125,6 +123,7 @@
 
     private int mFlags;
     private int mPreviousRotation = ROTATION_0;
+    private boolean mListenersInitialized = false;
 
     // Combined int which encodes the full state.
     private int mStateId = 0;
@@ -152,19 +151,32 @@
         mFlags = sizeStrategy.rotationSupportedByActivity
                 ? FLAG_MULTIPLE_ORIENTATION_SUPPORTED_BY_ACTIVITY : 0;
 
-        Resources res = context.getResources();
-        int originalSmallestWidth = res.getConfiguration().smallestScreenWidthDp
-                * res.getDisplayMetrics().densityDpi / DENSITY_DEVICE_STABLE;
-        if (originalSmallestWidth < 600 && !mContext.getResources().getBoolean(
-                R.bool.allow_rotation)) {
-            mFlags |= FLAG_MULTIPLE_ORIENTATION_SUPPORTED_BY_DENSITY;
-        }
         mFlags |= FLAG_SWIPE_UP_NOT_RUNNING;
         mSettingsCache = SettingsCache.INSTANCE.get(mContext);
         initFlags();
     }
 
     /**
+     * Sets the device profile for the current state.
+     */
+    public void setDeviceProfile(DeviceProfile deviceProfile) {
+        boolean oldMultipleOrientationsSupported = isMultipleOrientationSupportedByDevice();
+        setFlag(FLAG_MULTIPLE_ORIENTATION_SUPPORTED_BY_DENSITY, !deviceProfile.allowRotation);
+        if (mListenersInitialized) {
+            boolean newMultipleOrientationsSupported = isMultipleOrientationSupportedByDevice();
+            // If isMultipleOrientationSupportedByDevice is changed, init or destroy listeners
+            // accordingly.
+            if (newMultipleOrientationsSupported != oldMultipleOrientationsSupported) {
+                if (newMultipleOrientationsSupported) {
+                    initMultipleOrientationListeners();
+                } else {
+                    destroyMultipleOrientationListeners();
+                }
+            }
+        }
+    }
+
+    /**
      * Sets the rotation for the recents activity, which could affect the appearance of task view.
      * @see #update(int, int)
      */
@@ -287,14 +299,24 @@
         updateHomeRotationSetting();
     }
 
+    private void initMultipleOrientationListeners() {
+        mSharedPrefs.registerOnSharedPreferenceChangeListener(this);
+        mSettingsCache.register(ROTATION_SETTING_URI, mRotationChangeListener);
+    }
+
+    private void destroyMultipleOrientationListeners() {
+        mSharedPrefs.unregisterOnSharedPreferenceChangeListener(this);
+        mSettingsCache.unregister(ROTATION_SETTING_URI, mRotationChangeListener);
+    }
+
     /**
      * Initializes any system values and registers corresponding change listeners. It must be
      * paired with {@link #destroyListeners()} call
      */
     public void initListeners() {
+        mListenersInitialized = true;
         if (isMultipleOrientationSupportedByDevice()) {
-            mSharedPrefs.registerOnSharedPreferenceChangeListener(this);
-            mSettingsCache.register(ROTATION_SETTING_URI, mRotationChangeListener);
+            initMultipleOrientationListeners();
         }
         initFlags();
     }
@@ -303,9 +325,9 @@
      * Unregisters any previously registered listeners.
      */
     public void destroyListeners() {
+        mListenersInitialized = false;
         if (isMultipleOrientationSupportedByDevice()) {
-            mSharedPrefs.unregisterOnSharedPreferenceChangeListener(this);
-            mSettingsCache.unregister(ROTATION_SETTING_URI, mRotationChangeListener);
+            destroyMultipleOrientationListeners();
         }
         setRotationWatcherEnabled(false);
     }
diff --git a/quickstep/src/com/android/quickstep/util/TaskViewSimulator.java b/quickstep/src/com/android/quickstep/util/TaskViewSimulator.java
index f578ad1..b15bbf3 100644
--- a/quickstep/src/com/android/quickstep/util/TaskViewSimulator.java
+++ b/quickstep/src/com/android/quickstep/util/TaskViewSimulator.java
@@ -112,6 +112,7 @@
     public void setDp(DeviceProfile dp) {
         mDp = dp;
         mLayoutValid = false;
+        mOrientationState.setDeviceProfile(dp);
     }
 
     /**
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 5958832..dcef7cf 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -1232,13 +1232,51 @@
     @Override
     public void setInsets(Rect insets) {
         mInsets.set(insets);
-        resetPaddingFromTaskSize();
+
+        // Update DeviceProfile dependant state.
         DeviceProfile dp = mActivity.getDeviceProfile();
+        setOverviewGridEnabled(
+                mActivity.getStateManager().getState().displayOverviewTasksAsGrid(dp));
+
+        // Propagate DeviceProfile change event.
         mLiveTileTaskViewSimulator.setDp(dp);
         mActionsView.setDp(dp);
+        mOrientationState.setDeviceProfile(dp);
+
+        // Update RecentsView adn TaskView's DeviceProfile dependent layout.
+        updateOrientationHandler();
     }
 
-    private void resetPaddingFromTaskSize() {
+    private void updateOrientationHandler() {
+        // Handle orientation changes.
+        mOrientationHandler = mOrientationState.getOrientationHandler();
+        mIsRtl = mOrientationHandler.getRecentsRtlSetting(getResources());
+        setLayoutDirection(mIsRtl
+                ? View.LAYOUT_DIRECTION_RTL
+                : View.LAYOUT_DIRECTION_LTR);
+        mClearAllButton.setLayoutDirection(mIsRtl
+                ? View.LAYOUT_DIRECTION_LTR
+                : View.LAYOUT_DIRECTION_RTL);
+        mClearAllButton.setRotation(mOrientationHandler.getDegreesRotated());
+        mActivity.getDragLayer().recreateControllers();
+        boolean isInLandscape = mOrientationState.getTouchRotation() != ROTATION_0
+                || mOrientationState.getRecentsActivityRotation() != ROTATION_0;
+        mActionsView.updateHiddenFlags(HIDDEN_NON_ZERO_ROTATION,
+                !mOrientationState.canRecentsActivityRotate() && isInLandscape);
+
+        // Update TaskView's DeviceProfile dependent layout.
+        updateChildTaskOrientations();
+
+        // Recalculate DeviceProfile dependent layout.
+        updateSizeAndPadding();
+
+        requestLayout();
+        // Reapply the current page to update page scrolls.
+        setCurrentPage(mCurrentPage);
+    }
+
+    // Update task size and padding that are dependent on DeviceProfile and insets.
+    private void updateSizeAndPadding() {
         DeviceProfile dp = mActivity.getDeviceProfile();
         getTaskSize(mTempRect);
         mTaskWidth = mTempRect.width();
@@ -2554,28 +2592,6 @@
         }
     }
 
-    private void updateOrientationHandler() {
-        mOrientationHandler = mOrientationState.getOrientationHandler();
-        mIsRtl = mOrientationHandler.getRecentsRtlSetting(getResources());
-        setLayoutDirection(mIsRtl
-                ? View.LAYOUT_DIRECTION_RTL
-                : View.LAYOUT_DIRECTION_LTR);
-        mClearAllButton.setLayoutDirection(mIsRtl
-                ? View.LAYOUT_DIRECTION_LTR
-                : View.LAYOUT_DIRECTION_RTL);
-        mClearAllButton.setRotation(mOrientationHandler.getDegreesRotated());
-        mActivity.getDragLayer().recreateControllers();
-        boolean isInLandscape = mOrientationState.getTouchRotation() != ROTATION_0
-                || mOrientationState.getRecentsActivityRotation() != ROTATION_0;
-        mActionsView.updateHiddenFlags(HIDDEN_NON_ZERO_ROTATION,
-                !mOrientationState.canRecentsActivityRotate() && isInLandscape);
-        updateChildTaskOrientations();
-        resetPaddingFromTaskSize();
-        requestLayout();
-        // Reapply the current page to update page scrolls.
-        setCurrentPage(mCurrentPage);
-    }
-
     public RecentsOrientedState getPagedViewOrientedState() {
         return mOrientationState;
     }
@@ -3656,7 +3672,6 @@
     public void onSecondaryWindowBoundsChanged() {
         // Invalidate the task view size
         setInsets(mInsets);
-        requestLayout();
     }
 
     /**