From 8132ba5e2e82d02697ef0570142abb8fc8054a67 Mon Sep 17 00:00:00 2001
From: Adam Powell <adamp@google.com>
Date: Fri, 15 Jul 2011 17:37:11 -0700
Subject: [PATCH] Fix bug 5011067 - align popup lists to their content rather
 than window frame by default

Change-Id: I05803b7487248d38981c2adc5422bf01761bc18c
---
 core/java/android/widget/ListPopupWindow.java | 25 +++++++++++++------
 core/java/android/widget/Spinner.java         | 15 ++++++++---
 2 files changed, 29 insertions(+), 11 deletions(-)

diff --git a/core/java/android/widget/ListPopupWindow.java b/core/java/android/widget/ListPopupWindow.java
index 564287785abf8..f057d07033b7b 100644
--- a/core/java/android/widget/ListPopupWindow.java
+++ b/core/java/android/widget/ListPopupWindow.java
@@ -62,6 +62,7 @@ public class ListPopupWindow {
     private int mDropDownWidth = ViewGroup.LayoutParams.WRAP_CONTENT;
     private int mDropDownHorizontalOffset;
     private int mDropDownVerticalOffset;
+    private boolean mDropDownVerticalOffsetSet;
 
     private boolean mDropDownAlwaysVisible = false;
     private boolean mForceIgnoreOutsideTouch = false;
@@ -404,6 +405,9 @@ public class ListPopupWindow {
      * @return The vertical offset of the popup from its anchor in pixels.
      */
     public int getVerticalOffset() {
+        if (!mDropDownVerticalOffsetSet) {
+            return 0;
+        }
         return mDropDownVerticalOffset;
     }
 
@@ -414,6 +418,7 @@ public class ListPopupWindow {
      */
     public void setVerticalOffset(int offset) {
         mDropDownVerticalOffset = offset;
+        mDropDownVerticalOffsetSet = true;
     }
 
     /**
@@ -1061,21 +1066,27 @@ public class ListPopupWindow {
             }
         }
 
-        // Max height available on the screen for a popup.
-        boolean ignoreBottomDecorations =
-                mPopup.getInputMethodMode() == PopupWindow.INPUT_METHOD_NOT_NEEDED;
-        final int maxHeight = mPopup.getMaxAvailableHeight(
-                getAnchorView(), mDropDownVerticalOffset, ignoreBottomDecorations);
-
-        // getMaxAvailableHeight() subtracts the padding, so we put it back,
+        // getMaxAvailableHeight() subtracts the padding, so we put it back
         // to get the available height for the whole window
         int padding = 0;
         Drawable background = mPopup.getBackground();
         if (background != null) {
             background.getPadding(mTempRect);
             padding = mTempRect.top + mTempRect.bottom;
+
+            // If we don't have an explicit vertical offset, determine one from the window
+            // background so that content will line up.
+            if (!mDropDownVerticalOffsetSet) {
+                mDropDownVerticalOffset = -mTempRect.top;
+            }
         }
 
+        // Max height available on the screen for a popup.
+        boolean ignoreBottomDecorations =
+                mPopup.getInputMethodMode() == PopupWindow.INPUT_METHOD_NOT_NEEDED;
+        final int maxHeight = mPopup.getMaxAvailableHeight(
+                getAnchorView(), mDropDownVerticalOffset, ignoreBottomDecorations);
+
         if (mDropDownAlwaysVisible || mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT) {
             return maxHeight + padding;
         }
diff --git a/core/java/android/widget/Spinner.java b/core/java/android/widget/Spinner.java
index 485c67861f37f..2fba18b12ec80 100644
--- a/core/java/android/widget/Spinner.java
+++ b/core/java/android/widget/Spinner.java
@@ -165,10 +165,17 @@ public class Spinner extends AbsSpinner implements OnClickListener {
                     ViewGroup.LayoutParams.WRAP_CONTENT);
             popup.setBackgroundDrawable(a.getDrawable(
                     com.android.internal.R.styleable.Spinner_popupBackground));
-            popup.setVerticalOffset(a.getDimensionPixelOffset(
-                    com.android.internal.R.styleable.Spinner_dropDownVerticalOffset, 0));
-            popup.setHorizontalOffset(a.getDimensionPixelOffset(
-                    com.android.internal.R.styleable.Spinner_dropDownHorizontalOffset, 0));
+            final int verticalOffset = a.getDimensionPixelOffset(
+                    com.android.internal.R.styleable.Spinner_dropDownVerticalOffset, 0);
+            if (verticalOffset != 0) {
+                popup.setVerticalOffset(verticalOffset);
+            }
+
+            final int horizontalOffset = a.getDimensionPixelOffset(
+                    com.android.internal.R.styleable.Spinner_dropDownHorizontalOffset, 0);
+            if (horizontalOffset != 0) {
+                popup.setHorizontalOffset(horizontalOffset);
+            }
 
             mPopup = popup;
             break;