Reduce margin for DropTargetBar to avoid buttons to be truncated.

Bug: 187036287
Test: Tested manually by QA testing team on 4X5 grid size
Change-Id: Iaa4cd3e464ccf50427a5aa96d97093601e1d2948
diff --git a/res/values-sw340dp/dimens.xml b/res/values-sw340dp/dimens.xml
index c9f2981..33b06f5 100644
--- a/res/values-sw340dp/dimens.xml
+++ b/res/values-sw340dp/dimens.xml
@@ -19,6 +19,5 @@
 
     <!-- Drag padding to add to the bottom of drop targets -->
     <dimen name="drop_target_drag_padding">20dp</dimen>
-    <dimen name="drop_target_text_size">16sp</dimen>
 
 </resources>
\ No newline at end of file
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 270c92e..b91b1a4 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -189,8 +189,9 @@
 <!-- Dragging -->
     <!-- Drag padding to add to the bottom of drop targets -->
     <dimen name="drop_target_drag_padding">14dp</dimen>
-    <dimen name="drop_target_text_size">20sp</dimen>
+    <dimen name="drop_target_text_size">16sp</dimen>
     <dimen name="drop_target_shadow_elevation">2dp</dimen>
+    <dimen name="drop_target_bar_margin_horizontal">4dp</dimen>
 
     <!-- the distance an icon must be dragged before button drop targets accept it -->
     <dimen name="drag_distanceThreshold">30dp</dimen>
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 416c711..24851f2 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -258,7 +258,7 @@
     <!-- Drop targets -->
     <style name="DropTargetButtonBase" parent="@android:style/TextAppearance.DeviceDefault">
         <item name="android:drawablePadding">8dp</item>
-        <item name="android:padding">16dp</item>
+        <item name="android:padding">14dp</item>
         <item name="android:textColor">@color/drop_target_text</item>
         <item name="android:textSize">@dimen/drop_target_text_size</item>
         <item name="android:singleLine">true</item>
diff --git a/src/com/android/launcher3/DropTargetBar.java b/src/com/android/launcher3/DropTargetBar.java
index 4a1b084..88f6c49 100644
--- a/src/com/android/launcher3/DropTargetBar.java
+++ b/src/com/android/launcher3/DropTargetBar.java
@@ -105,7 +105,8 @@
                         / (2 * (grid.inv.numColumns + 1)))
                         + grid.edgeMarginPx;
             } else {
-                gap = grid.desiredWorkspaceLeftRightMarginPx - grid.inv.defaultWidgetPadding.right;
+                gap = getContext().getResources()
+                        .getDimensionPixelSize(R.dimen.drop_target_bar_margin_horizontal);
             }
             lp.width = grid.availableWidthPx - 2 * gap;