Add system window inset support to DragLayer and children.

Instead of fitting system windows as before, DragLayer now
lays out under the system windows.

DragLayer will simply add the system window insets to each
child's layout margins by default.  e.g. for Hotseat, Page
Indicators, QSB, Search Overlay.

Children that want to use the full viewport can declare so
by implementing a new Insettable interface.  System window
insets will be passed to Insettable#setInsets(insets) and
the child can do what it wants with them.

Currently, two of DragLayer's children implement Insettable:

1) Workspace (for the -1 screen).
   Full screen pages are given the entire viewport, paged
   view offsets modified to end up in the right place now
   that the viewport is larger (the full screen height).
   Non-full screen pages like the normal icon pages simply
   apply the insets to end up in the same place they did
   before.
   NowClientCardsView uses the full viewport, applying the
   insets as padding. Will want to better take advantage
   of this new real estate in a future CL.

2) All Apps (AppsCustomizeTabHost).
   Applies the insets as layout margin one level down, so that
   the bar area is opaque during the transition, but visually
   the content lands in the same place.

(Also add db_files to .gitignore to ignore the output of the
db tool)

Bug:10687177
Bug:10652189
Change-Id: I80b25d63884d244fcf704b24dad9497ee0d8b453

8 files changed, 79 insertions, 10 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 000000000..f830c66eb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+db_files
diff --git a/res/layout-port/launcher.xml b/res/layout-port/launcher.xml
index dd3ad47e4..9844a370c 100644
--- a/res/layout-port/launcher.xml
+++ b/res/layout-port/launcher.xml
@@ -27,8 +27,7 @@
     <com.android.launcher3.DragLayer
         android:id="@+id/drag_layer"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:fitsSystemWindows="true">
+        android:layout_height="match_parent">
 
         <!-- The workspace contains 5 screens of cells -->
         <com.android.launcher3.Workspace
diff --git a/src/com/android/launcher3/AppsCustomizeTabHost.java b/src/com/android/launcher3/AppsCustomizeTabHost.java
index 71219cd57..8aef864b4 100644
--- a/src/com/android/launcher3/AppsCustomizeTabHost.java
+++ b/src/com/android/launcher3/AppsCustomizeTabHost.java
@@ -22,6 +22,7 @@ import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.content.Context;
 import android.content.res.Resources;
+import android.graphics.Rect;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
@@ -36,7 +37,7 @@ import android.widget.TextView;
 import java.util.ArrayList;
 
 public class AppsCustomizeTabHost extends TabHost implements LauncherTransitionable,
-        TabHost.OnTabChangeListener  {
+        TabHost.OnTabChangeListener, Insettable  {
     static final String LOG_TAG = "AppsCustomizeTabHost";
 
     private static final String APPS_TAB_TAG = "APPS";
@@ -53,6 +54,7 @@ public class AppsCustomizeTabHost extends TabHost implements LauncherTransitiona
     private boolean mTransitioningToWorkspace;
     private boolean mResetAfterTransition;
     private Runnable mRelayoutAndMakeVisible;
+    private final Rect mInsets = new Rect();
 
     public AppsCustomizeTabHost(Context context, AttributeSet attrs) {
         super(context, attrs);
@@ -86,6 +88,17 @@ public class AppsCustomizeTabHost extends TabHost implements LauncherTransitiona
         setContentTypeImmediate(AppsCustomizePagedView.ContentType.Widgets);
     }
 
+    @Override
+    public void setInsets(Rect insets) {
+        mInsets.set(insets);
+        FrameLayout.LayoutParams flp = (LayoutParams) mContent.getLayoutParams();
+        flp.topMargin = insets.top;
+        flp.bottomMargin = insets.bottom;
+        flp.leftMargin = insets.left;
+        flp.rightMargin = insets.right;
+        mContent.setLayoutParams(flp);
+    }
+
     /**
      * Setup the tab host and create all necessary tabs.
      */
diff --git a/src/com/android/launcher3/DragLayer.java b/src/com/android/launcher3/DragLayer.java
index be0d47b68..9c649edda 100644
--- a/src/com/android/launcher3/DragLayer.java
+++ b/src/com/android/launcher3/DragLayer.java
@@ -69,6 +69,8 @@ public class DragLayer extends FrameLayout implements ViewGroup.OnHierarchyChang
     public static final int ANIMATION_END_FADE_OUT = 1;
     public static final int ANIMATION_END_REMAIN_VISIBLE = 2;
 
+    private final Rect mInsets = new Rect();
+
     /**
      * Used to create a new DragLayer from XML.
      *
@@ -97,6 +99,26 @@ public class DragLayer extends FrameLayout implements ViewGroup.OnHierarchyChang
         return mDragController.dispatchKeyEvent(event) || super.dispatchKeyEvent(event);
     }
 
+    @Override
+    protected boolean fitSystemWindows(Rect insets) {
+        final int n = getChildCount();
+        for (int i = 0; i < n; i++) {
+            final View child = getChildAt(i);
+            final FrameLayout.LayoutParams flp = (FrameLayout.LayoutParams) child.getLayoutParams();
+            if (child instanceof Insettable) {
+                ((Insettable)child).setInsets(insets);
+            } else  {
+                flp.topMargin += (insets.top - mInsets.top);
+                flp.leftMargin += (insets.left - mInsets.left);
+                flp.rightMargin += (insets.right - mInsets.right);
+                flp.bottomMargin += (insets.bottom - mInsets.bottom);
+            }
+            child.setLayoutParams(flp);
+        }
+        mInsets.set(insets);
+        return true; // I'll take it from here
+    }
+
     private boolean isEventOverFolderTextRegion(Folder folder, MotionEvent ev) {
         getDescendantRectRelativeToSelf(folder.getEditTextRegion(), mHitRect);
         if (mHitRect.contains((int) ev.getX(), (int) ev.getY())) {
diff --git a/src/com/android/launcher3/Insettable.java b/src/com/android/launcher3/Insettable.java
new file mode 100644
index 000000000..1d2356c65
--- /dev/null
+++ b/src/com/android/launcher3/Insettable.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3;
+
+import android.graphics.Rect;
+
+public interface Insettable {
+
+    void setInsets(Rect insets);
+}
\ No newline at end of file
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index bdd9add14..29c4e3eaf 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -1103,7 +1103,8 @@ public class Launcher extends Activity
         mDragLayer = (DragLayer) findViewById(R.id.drag_layer);
         mWorkspace = (Workspace) mDragLayer.findViewById(R.id.workspace);
 
-        mLauncherView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
+        mLauncherView.setSystemUiVisibility(
+                View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
         mWorkspaceBackgroundDrawable = getResources().getDrawable(R.drawable.workspace_bg);
 
         // Setup the drag layer
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index 76c9a3205..bdb0d5819 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -260,6 +260,8 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
     // Bouncer
     private boolean mTopAlignPageWhenShrinkingForBouncer = false;
 
+    protected final Rect mInsets = new Rect();
+
     public interface PageSwitchListener {
         void onPageSwitch(View newPage, int newPageIndex);
     }
@@ -798,7 +800,7 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
                 }
 
                 childWidth = widthSize - horizontalPadding;
-                childHeight = heightSize - verticalPadding;
+                childHeight = heightSize - verticalPadding - mInsets.top - mInsets.bottom;
 
             } else {
                 childWidthMode = MeasureSpec.EXACTLY;
@@ -873,17 +875,15 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
         }
 
         for (int i = startIndex; i != endIndex; i += delta) {
-
             final View child = getPageAt(i);
             LayoutParams lp = (LayoutParams) child.getLayoutParams();
             int childTop;
-
             if (lp.isFullScreenPage) {
                 childTop = offsetY;
             } else {
-                childTop = offsetY + getPaddingTop();
+                childTop = offsetY + getPaddingTop() + mInsets.top;
                 if (mCenterPagesVertically) {
-                    childTop += ((getViewportHeight() - verticalPadding) - child.getMeasuredHeight()) / 2;
+                    childTop += (getViewportHeight() - mInsets.top - mInsets.bottom - verticalPadding - child.getMeasuredHeight()) / 2;
                 }
             }
 
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index a8ca36b7d..3f63d743a 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -71,7 +71,8 @@ import java.util.Iterator;
  */
 public class Workspace extends SmoothPagedView
         implements DropTarget, DragSource, DragScroller, View.OnTouchListener,
-        DragController.DragListener, LauncherTransitionable, ViewGroup.OnHierarchyChangeListener {
+        DragController.DragListener, LauncherTransitionable, ViewGroup.OnHierarchyChangeListener,
+        Insettable {
     private static final String TAG = "Launcher.Workspace";
 
     // Y rotation to apply to the workspace screens
@@ -318,6 +319,11 @@ public class Workspace extends SmoothPagedView
         }
     }
 
+    @Override
+    public void setInsets(Rect insets) {
+        mInsets.set(insets);
+    }
+
     // estimate the size of a widget with spans hSpan, vSpan. return MAX_VALUE for each
     // dimension if unsuccessful
     public int[] estimateItemSize(int hSpan, int vSpan,
@@ -525,6 +531,9 @@ public class Workspace extends SmoothPagedView
         CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, spanX, spanY);
         lp.canReorder  = false;
         lp.isFullscreen = true;
+        if (customContent instanceof Insettable) {
+            ((Insettable)customContent).setInsets(mInsets);
+        }
         customScreen.addViewToCellLayout(customContent, 0, 0, lp, true);
 
         mCustomContentCallbacks = callbacks;