From 47639b9c1db9a5d0d89ce6b4b36d6b3c0d489602 Mon Sep 17 00:00:00 2001
From: Michael Jurka <mikejurka@google.com>
Date: Mon, 14 Jan 2013 12:42:27 +0100
Subject: Use less HW layers in All Apps

(saves memory)

Change-Id: Ib2beda7549662a787437c7aa043e7858357c051f
---
 .../android/launcher2/AppsCustomizePagedView.java  | 49 ++++++++++++++++++++--
 src/com/android/launcher2/PagedViewCellLayout.java | 13 +-----
 src/com/android/launcher2/PagedViewGridLayout.java | 10 +----
 src/com/android/launcher2/Workspace.java           |  4 +-
 4 files changed, 50 insertions(+), 26 deletions(-)

(limited to 'src')

diff --git a/src/com/android/launcher2/AppsCustomizePagedView.java b/src/com/android/launcher2/AppsCustomizePagedView.java
index 4bfeb60b8..e36eee29a 100644
--- a/src/com/android/launcher2/AppsCustomizePagedView.java
+++ b/src/com/android/launcher2/AppsCustomizePagedView.java
@@ -1099,7 +1099,7 @@ public class AppsCustomizePagedView extends PagedViewWithDraggableItems implemen
             images.add(info.iconBitmap);
         }
 
-        layout.createHardwareLayers();
+        enableHwLayersOnVisiblePages();
     }
 
     /**
@@ -1552,8 +1552,7 @@ public class AppsCustomizePagedView extends PagedViewWithDraggableItems implemen
                 }
             }
 
-            layout.createHardwareLayer();
-            invalidate();
+            enableHwLayersOnVisiblePages();
 
             // Update all thread priorities
             Iterator<AppsCustomizeAsyncTask> iter = mRunningTasks.iterator();
@@ -1676,6 +1675,50 @@ public class AppsCustomizePagedView extends PagedViewWithDraggableItems implemen
                 }
             }
         }
+
+        enableHwLayersOnVisiblePages();
+    }
+
+    private void enableHwLayersOnVisiblePages() {
+        final int screenCount = getChildCount();
+
+        getVisiblePages(mTempVisiblePagesRange);
+        int leftScreen = mTempVisiblePagesRange[0];
+        int rightScreen = mTempVisiblePagesRange[1];
+        int forceDrawScreen = -1;
+        if (leftScreen == rightScreen) {
+            // make sure we're caching at least two pages always
+            if (rightScreen < screenCount - 1) {
+                rightScreen++;
+                forceDrawScreen = rightScreen;
+            } else if (leftScreen > 0) {
+                leftScreen--;
+                forceDrawScreen = leftScreen;
+            }
+        } else {
+            forceDrawScreen = leftScreen + 1;
+        }
+
+        for (int i = 0; i < screenCount; i++) {
+            final View layout = (View) getPageAt(i);
+            if (!(leftScreen <= i && i <= rightScreen &&
+                    (i == forceDrawScreen || shouldDrawChild(layout)))) {
+                layout.setLayerType(LAYER_TYPE_NONE, null);
+            }
+        }
+
+        int newLeft = -1;
+        int newRight = -1;
+        for (int i = 0; i < screenCount; i++) {
+            final View layout = (View) getPageAt(i);
+
+            if (leftScreen <= i && i <= rightScreen &&
+                    (i == forceDrawScreen || shouldDrawChild(layout))) {
+                if (layout.getLayerType() != LAYER_TYPE_HARDWARE) {
+                    layout.setLayerType(LAYER_TYPE_HARDWARE, null);
+                }
+            }
+        }
     }
 
     protected void overScroll(float amount) {
diff --git a/src/com/android/launcher2/PagedViewCellLayout.java b/src/com/android/launcher2/PagedViewCellLayout.java
index 6f73e6341..9ce177b76 100644
--- a/src/com/android/launcher2/PagedViewCellLayout.java
+++ b/src/com/android/launcher2/PagedViewCellLayout.java
@@ -86,17 +86,6 @@ public class PagedViewCellLayout extends ViewGroup implements Page {
         return mCellHeight;
     }
 
-    void destroyHardwareLayers() {
-        // called when a page is no longer visible (triggered by loadAssociatedPages ->
-        // removeAllViewsOnPage)
-        setLayerType(LAYER_TYPE_NONE, null);
-    }
-
-    void createHardwareLayers() {
-        // called when a page is visible (triggered by loadAssociatedPages -> syncPageItems)
-        setLayerType(LAYER_TYPE_HARDWARE, null);
-    }
-
     @Override
     public void cancelLongPress() {
         super.cancelLongPress();
@@ -133,7 +122,7 @@ public class PagedViewCellLayout extends ViewGroup implements Page {
     @Override
     public void removeAllViewsOnPage() {
         mChildren.removeAllViews();
-        destroyHardwareLayers();
+        setLayerType(LAYER_TYPE_NONE, null);
     }
 
     @Override
diff --git a/src/com/android/launcher2/PagedViewGridLayout.java b/src/com/android/launcher2/PagedViewGridLayout.java
index 90bfe88ec..aa9adc0ea 100644
--- a/src/com/android/launcher2/PagedViewGridLayout.java
+++ b/src/com/android/launcher2/PagedViewGridLayout.java
@@ -98,19 +98,11 @@ public class PagedViewGridLayout extends GridLayout implements Page {
         return result;
     }
 
-    void destroyHardwareLayer() {
-        setLayerType(LAYER_TYPE_NONE, null);
-    }
-
-    void createHardwareLayer() {
-        setLayerType(LAYER_TYPE_HARDWARE, null);
-    }
-
     @Override
     public void removeAllViewsOnPage() {
         removeAllViews();
         mOnLayoutListener = null;
-        destroyHardwareLayer();
+        setLayerType(LAYER_TYPE_NONE, null);
     }
 
     @Override
diff --git a/src/com/android/launcher2/Workspace.java b/src/com/android/launcher2/Workspace.java
index 2c44aca07..9d8845b2c 100644
--- a/src/com/android/launcher2/Workspace.java
+++ b/src/com/android/launcher2/Workspace.java
@@ -1406,13 +1406,13 @@ public class Workspace extends SmoothPagedView
                 }
             }
             for (int i = 0; i < screenCount; i++) {
-                final CellLayout layout = (CellLayout) getChildAt(i);
+                final CellLayout layout = (CellLayout) getPageAt(i);
                 if (!(leftScreen <= i && i <= rightScreen && shouldDrawChild(layout))) {
                     layout.disableHardwareLayers();
                 }
             }
             for (int i = 0; i < screenCount; i++) {
-                final CellLayout layout = (CellLayout) getChildAt(i);
+                final CellLayout layout = (CellLayout) getPageAt(i);
                 if (leftScreen <= i && i <= rightScreen && shouldDrawChild(layout)) {
                     layout.enableHardwareLayers();
                 }
-- 
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