Calculate min height for header in code

Having a resource that depended on 6 other resources was becoming
unmaintainable. Replace with in code calculation, guaranteeing that
it'll always be up to date for handheld devices.

Test: manual
Fixes: 225405922
Change-Id: Ieb13b1d71d4b205ea37ff096e447f93bbaec2630

packages/SystemUI/res/layout/qs_customize_header.xml

@@ -21,6 +21,5 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:gravity="center"
-    android:minHeight="@dimen/qs_customize_header_min_height"
     android:textAppearance="@style/TextAppearance.QSEdit"
     android:text="@string/drag_to_rearrange_tiles" />

packages/SystemUI/res/values-land/dimens.xml

@@ -25,11 +25,6 @@
     <dimen name="qs_brightness_margin_top">0dp</dimen>
     <dimen name="qs_brightness_margin_bottom">12dp</dimen>
     <dimen name="qqs_layout_margin_top">8dp</dimen>
-    <!-- The height of the qs customize header. Should be
-    (qs_panel_padding_top (48dp) +  brightness_mirror_height (48dp) + qs_brightness_margin_top (0dp) + qs_brightness_margin_bottom (12dp)) -
-    (Toolbar_minWidth (56dp) + qs_tile_margin_top_bottom (4dp))
-    -->
-    <dimen name="qs_customize_header_min_height">48dp</dimen>
 
     <!--  In landscape the security footer is actually part of the header,
     and needs to be as short as the header  -->

packages/SystemUI/res/values/dimens.xml

@@ -476,11 +476,7 @@
     <dimen name="qs_brightness_margin_top">8dp</dimen>
     <dimen name="qs_brightness_margin_bottom">24dp</dimen>
     <dimen name="qqs_layout_margin_top">16dp</dimen>
-    <!-- The height of the qs customize header. Should be
-         (qs_panel_padding_top (48dp) +  brightness_mirror_height (48dp) + qs_brightness_margin_top(8dp) + qs_brightness_margin_bottom (24dp)) -
-         (Toolbar_minWidth (56dp) + qs_tile_margin_top_bottom (4dp))
-    -->
-    <dimen name="qs_customize_header_min_height">68dp</dimen>
+
     <dimen name="qs_customize_internal_side_paddings">8dp</dimen>
     <dimen name="qs_icon_size">20dp</dimen>
     <dimen name="qs_side_view_size">28dp</dimen>

packages/SystemUI/src/com/android/systemui/qs/customize/QSCustomizer.java

@@ -88,6 +88,7 @@ public class QSCustomizer extends LinearLayout {
         LayoutParams lp = (LayoutParams) mTransparentView.getLayoutParams();
         lp.height = QSUtils.getQsHeaderSystemIconsAreaHeight(mContext);
         mTransparentView.setLayoutParams(lp);
+        mRecyclerView.getAdapter().notifyItemChanged(0);
     }
 
     void updateNavBackDrop(Configuration newConfig, LightBarController lightBarController) {

packages/SystemUI/src/com/android/systemui/qs/customize/TileAdapter.java

@@ -17,6 +17,7 @@ package com.android.systemui.qs.customize;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.res.Resources;
+import android.content.res.TypedArray;
 import android.graphics.Canvas;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
@@ -277,7 +278,9 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
         final Context context = parent.getContext();
         LayoutInflater inflater = LayoutInflater.from(context);
         if (viewType == TYPE_HEADER) {
-            return new Holder(inflater.inflate(R.layout.qs_customize_header, parent, false));
+            View v = inflater.inflate(R.layout.qs_customize_header, parent, false);
+            v.setMinimumHeight(calculateHeaderMinHeight(context));
+            return new Holder(v);
         }
         if (viewType == TYPE_DIVIDER) {
             return new Holder(inflater.inflate(R.layout.qs_customize_tile_divider, parent, false));
@@ -835,4 +838,26 @@ public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileSta
             super.clearView(recyclerView, viewHolder);
         }
     };
+
+    private static int calculateHeaderMinHeight(Context context) {
+        Resources res = context.getResources();
+        // style used in qs_customize_header.xml for the Toolbar
+        TypedArray toolbarStyle = context.obtainStyledAttributes(
+                R.style.QSCustomizeToolbar, com.android.internal.R.styleable.Toolbar);
+        int buttonStyle = toolbarStyle.getResourceId(
+                com.android.internal.R.styleable.Toolbar_navigationButtonStyle, 0);
+        toolbarStyle.recycle();
+        int buttonMinWidth = 0;
+        if (buttonStyle != 0) {
+            TypedArray t = context.obtainStyledAttributes(buttonStyle, android.R.styleable.View);
+            buttonMinWidth = t.getDimensionPixelSize(android.R.styleable.View_minWidth, 0);
+            t.recycle();
+        }
+        return res.getDimensionPixelSize(R.dimen.qs_panel_padding_top)
+                + res.getDimensionPixelSize(R.dimen.brightness_mirror_height)
+                + res.getDimensionPixelSize(R.dimen.qs_brightness_margin_top)
+                + res.getDimensionPixelSize(R.dimen.qs_brightness_margin_bottom)
+                - buttonMinWidth
+                - res.getDimensionPixelSize(R.dimen.qs_tile_margin_top_bottom);
+    }
 }