Ensuring that the second card is maximally visible when you go into recents.

Change-Id: Ia13c56941bfc47de341dd57501d156e925a3b2fc

4 files changed, 45 insertions, 15 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/recents/AlternateRecentsComponent.java b/packages/SystemUI/src/com/android/systemui/recents/AlternateRecentsComponent.java
index ffd64d4..be1d47a 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/AlternateRecentsComponent.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/AlternateRecentsComponent.java
@@ -62,12 +62,15 @@ public class AlternateRecentsComponent {
                 Bundle replyData = msg.getData().getParcelable(KEY_CONFIGURATION_DATA);
                 mSingleCountFirstTaskRect = replyData.getParcelable(KEY_SINGLE_TASK_STACK_RECT);
                 mSingleCountFirstTaskRect.offset(0, (int) statusBarHeight);
+                mTwoCountFirstTaskRect = replyData.getParcelable(KEY_TWO_TASK_STACK_RECT);
+                mTwoCountFirstTaskRect.offset(0, (int) statusBarHeight);
                 mMultipleCountFirstTaskRect = replyData.getParcelable(KEY_MULTIPLE_TASK_STACK_RECT);
                 mMultipleCountFirstTaskRect.offset(0, (int) statusBarHeight);
                 if (Console.Enabled) {
                     Console.log(Constants.Log.App.RecentsComponent,
                             "[RecentsComponent|RecentsMessageHandler|handleMessage]",
                             "singleTaskRect: " + mSingleCountFirstTaskRect +
+                            " twoTaskRect: " + mTwoCountFirstTaskRect +
                             " multipleTaskRect: " + mMultipleCountFirstTaskRect);
                 }
 
@@ -130,6 +133,7 @@ public class AlternateRecentsComponent {
     final public static String KEY_WINDOW_RECT = "recents.windowRect";
     final public static String KEY_SYSTEM_INSETS = "recents.systemInsets";
     final public static String KEY_SINGLE_TASK_STACK_RECT = "recents.singleCountTaskRect";
+    final public static String KEY_TWO_TASK_STACK_RECT = "recents.twoCountTaskRect";
     final public static String KEY_MULTIPLE_TASK_STACK_RECT = "recents.multipleCountTaskRect";
 
 
@@ -155,6 +159,7 @@ public class AlternateRecentsComponent {
     boolean mTriggeredFromAltTab;
 
     Rect mSingleCountFirstTaskRect = new Rect();
+    Rect mTwoCountFirstTaskRect = new Rect();
     Rect mMultipleCountFirstTaskRect = new Rect();
     long mLastToggleTime;
 
@@ -261,8 +266,10 @@ public class AlternateRecentsComponent {
     /** Returns whether we have valid task rects to animate to. */
     boolean hasValidTaskRects() {
         return mSingleCountFirstTaskRect != null && mSingleCountFirstTaskRect.width() > 0 &&
-                mSingleCountFirstTaskRect.height() > 0 && mMultipleCountFirstTaskRect != null &&
-                mMultipleCountFirstTaskRect.width() > 0 && mMultipleCountFirstTaskRect.height() > 0;
+                mSingleCountFirstTaskRect.height() > 0 && mTwoCountFirstTaskRect != null &&
+                mTwoCountFirstTaskRect.width() > 0 && mTwoCountFirstTaskRect.height() > 0 &&
+                mMultipleCountFirstTaskRect != null && mMultipleCountFirstTaskRect.width() > 0 &&
+                mMultipleCountFirstTaskRect.height() > 0;
     }
 
     /** Updates each of the task animation rects. */
@@ -303,8 +310,8 @@ public class AlternateRecentsComponent {
         return null;
     }
 
-    /** Returns whether there is are multiple recents tasks */
-    boolean hasMultipleRecentsTask(List<ActivityManager.RecentTaskInfo> tasks) {
+    /** Returns the proper rect to use for the animation, given the number of tasks. */
+    Rect getAnimationTaskRect(List<ActivityManager.RecentTaskInfo> tasks) {
         // NOTE: Currently there's no method to get the number of non-home tasks, so we have to
         // compute this ourselves
         SystemServicesProxy ssp = mSystemServicesProxy;
@@ -318,7 +325,13 @@ public class AlternateRecentsComponent {
                 continue;
             }
         }
-        return (tasks.size() > 1);
+        if (tasks.size() <= 1) {
+            return mSingleCountFirstTaskRect;
+        } else if (tasks.size() <= 2) {
+            return mTwoCountFirstTaskRect;
+        } else {
+            return mMultipleCountFirstTaskRect;
+        }
     }
 
     /** Converts from the device rotation to the degree */
@@ -472,9 +485,8 @@ public class AlternateRecentsComponent {
         // which can differ depending on the number of items in the list.
         SystemServicesProxy ssp = mSystemServicesProxy;
         List<ActivityManager.RecentTaskInfo> recentTasks =
-                ssp.getRecentTasks(2, UserHandle.CURRENT.getIdentifier());
-        Rect taskRect = hasMultipleRecentsTask(recentTasks) ? mMultipleCountFirstTaskRect :
-                mSingleCountFirstTaskRect;
+                ssp.getRecentTasks(3, UserHandle.CURRENT.getIdentifier());
+        Rect taskRect = getAnimationTaskRect(recentTasks);
         boolean useThumbnailTransition = !isTopTaskHome &&
                 hasValidTaskRects();
 
diff --git a/packages/SystemUI/src/com/android/systemui/recents/Constants.java b/packages/SystemUI/src/com/android/systemui/recents/Constants.java
index 57957a8..e979afd 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/Constants.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/Constants.java
@@ -102,7 +102,7 @@ public class Constants {
             public static final int FilterStartDelay = 25;
 
             // The padding will be applied to the smallest dimension, and then applied to all sides
-            public static final float StackPaddingPct = 0.1f;
+            public static final float StackPaddingPct = 0.085f;
             // The overlap height relative to the task height
             public static final float StackOverlapPct = 0.65f;
             // The height of the peek space relative to the stack height
diff --git a/packages/SystemUI/src/com/android/systemui/recents/RecentsService.java b/packages/SystemUI/src/com/android/systemui/recents/RecentsService.java
index 4bdbb20..c4c910b 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/RecentsService.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/RecentsService.java
@@ -83,20 +83,29 @@ class SystemUIMessageHandler extends Handler {
                 stack.addTask(new Task());
                 tsv.computeRects(taskStackBounds.width(), taskStackBounds.height() -
                         systemInsets.top - systemInsets.bottom, 0, 0);
-                tsv.boundScroll();
+                tsv.setStackScrollToInitialState();
                 transform = tsv.getStackTransform(0, tsv.getStackScroll());
                 transform.rect.offset(taskStackBounds.left, taskStackBounds.top);
                 replyData.putParcelable(AlternateRecentsComponent.KEY_SINGLE_TASK_STACK_RECT,
                         new Rect(transform.rect));
 
-                // Also calculate the target task rect when there are multiple tasks.
+                // Also calculate the target task rect when there are two tasks.
                 stack.addTask(new Task());
                 tsv.computeRects(taskStackBounds.width(), taskStackBounds.height() -
                         systemInsets.top - systemInsets.bottom, 0, 0);
-                tsv.setStackScrollRaw(Integer.MAX_VALUE);
-                tsv.boundScroll();
+                tsv.setStackScrollToInitialState();
                 transform = tsv.getStackTransform(1, tsv.getStackScroll());
                 transform.rect.offset(taskStackBounds.left, taskStackBounds.top);
+                replyData.putParcelable(AlternateRecentsComponent.KEY_TWO_TASK_STACK_RECT,
+                        new Rect(transform.rect));
+
+                // Also calculate the target task rect when there are two tasks.
+                stack.addTask(new Task());
+                tsv.computeRects(taskStackBounds.width(), taskStackBounds.height() -
+                        systemInsets.top - systemInsets.bottom, 0, 0);
+                tsv.setStackScrollToInitialState();
+                transform = tsv.getStackTransform(2, tsv.getStackScroll());
+                transform.rect.offset(taskStackBounds.left, taskStackBounds.top);
                 replyData.putParcelable(AlternateRecentsComponent.KEY_MULTIPLE_TASK_STACK_RECT,
                         new Rect(transform.rect));
 
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
index 2b08b19..75893aa 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
@@ -172,7 +172,7 @@ public class TaskStackView extends FrameLayout implements TaskStack.TaskStackCal
         }
 
         // Set the alphas
-        transform.dismissAlpha = Math.max(-1f, Math.min(0f, t)) + 1f;
+        transform.dismissAlpha = Math.max(-1f, Math.min(0f, t + 1)) + 1f;
 
         // Update the rect and visibility
         transform.rect.set(mTaskRect);
@@ -300,6 +300,15 @@ public class TaskStackView extends FrameLayout implements TaskStack.TaskStackCal
     public void setStackScrollRaw(int value) {
         mStackScroll = value;
     }
+    /** Sets the current stack scroll to the initial state when you first enter recents */
+    public void setStackScrollToInitialState() {
+        if (mStack.getTaskCount() > 2) {
+            int initialScroll = mMaxScroll - mTaskRect.height() / 2;
+            setStackScroll(initialScroll);
+        } else {
+            setStackScroll(mMaxScroll);
+        }
+    }
 
     /**
      * Returns the scroll to such that the task transform at that index will have t=0. (If the scroll
@@ -700,7 +709,7 @@ public class TaskStackView extends FrameLayout implements TaskStack.TaskStackCal
         // If this is the first layout, then scroll to the front of the stack and synchronize the
         // stack views immediately
         if (mAwaitingFirstLayout) {
-            setStackScroll(mMaxScroll);
+            setStackScrollToInitialState();
             requestSynchronizeStackViewsWithModel();
             synchronizeStackViewsWithModel();