Add back gesture support when split selection active
* Currently this exits the current launcher state
back to homescreen whenever back is performed while
split selection is active.
* Open UX question if that needs to be changed.
Test: Did back gesture from workspace, overview, all apps
http://recall/-/cMb5xTTxhmZtFt04eYnmQj/g0kpGTsqlj0RSt4OfDBkpf
Bug: 295449659
Flag: ENABLE_SPLIT_FROM_WORKSPACE_TO_WORKSPACE
Change-Id: I74fe51aaf4301fb723d2e69e6b1b39d127f492d8
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index ffb8b82..439cc00 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -199,6 +199,7 @@
import com.android.launcher3.util.ActivityResultInfo;
import com.android.launcher3.util.ActivityTracker;
import com.android.launcher3.util.CannedAnimationCoordinator;
+import com.android.launcher3.util.BackPressHandler;
import com.android.launcher3.util.ComponentKey;
import com.android.launcher3.util.IntArray;
import com.android.launcher3.util.IntSet;
@@ -425,6 +426,8 @@
private final CannedAnimationCoordinator mAnimationCoordinator =
new CannedAnimationCoordinator(this);
+ private final List<BackPressHandler> mBackPressedHandlers = new ArrayList<>();
+
@Override
@TargetApi(Build.VERSION_CODES.S)
protected void onCreate(Bundle savedInstanceState) {
@@ -604,6 +607,7 @@
* <li> auto cancel action mode handler
* <li> drag handler
* <li> view handler
+ * <li> registered {@link BackPressHandler}
* <li> state handler
* </ol>
*
@@ -633,7 +637,14 @@
return topView;
}
- // #4 state handler
+ // #4 Custom back handlers
+ for (BackPressHandler handler : mBackPressedHandlers) {
+ if (handler.canHandleBack()) {
+ return handler;
+ }
+ }
+
+ // #5 state handler
return new OnBackAnimationCallback() {
@Override
public void onBackInvoked() {
@@ -3281,6 +3292,14 @@
updateDisallowBack();
}
+ protected void addBackAnimationCallback(BackPressHandler callback) {
+ mBackPressedHandlers.add(callback);
+ }
+
+ protected void removeBackAnimationCallback(BackPressHandler callback) {
+ mBackPressedHandlers.remove(callback);
+ }
+
private void updateDisallowBack() {
if (DESKTOP_MODE_1_SUPPORTED || DESKTOP_MODE_2_SUPPORTED) {
// Do not disable back in launcher when prototype behavior is enabled
@@ -3288,12 +3307,20 @@
}
LauncherRootView rv = getRootView();
if (rv != null) {
+ boolean isSplitSelectionEnabled = isSplitSelectionEnabled();
boolean disableBack = getStateManager().getState() == NORMAL
- && AbstractFloatingView.getTopOpenView(this) == null;
+ && AbstractFloatingView.getTopOpenView(this) == null
+ && !isSplitSelectionEnabled;
rv.setDisallowBackGesture(disableBack);
}
}
+ /** To be overridden by subclasses */
+ protected boolean isSplitSelectionEnabled() {
+ // Overridden
+ return false;
+ }
+
@Override
public void returnToHomescreen() {
super.returnToHomescreen();