Merge "Add View#getSourceLayoutResId()."

api/current.txt

@@ -50361,6 +50361,7 @@ package android.view {
     method public final int getScrollX();
     method public final int getScrollY();
     method @android.view.ViewDebug.ExportedProperty(category="drawing") @ColorInt public int getSolidColor();
+    method @LayoutRes public int getSourceLayoutResId();
     method public android.animation.StateListAnimator getStateListAnimator();
     method protected int getSuggestedMinimumHeight();
     method protected int getSuggestedMinimumWidth();

core/java/android/content/res/Resources.java

@@ -1394,6 +1394,17 @@ public class Resources {
         mResourcesImpl.getValue(name, outValue, resolveRefs);
     }
 
+
+    /**
+     * @param set AttributeSet for which we want to find the source.
+     * @return The resource id for the source that is backing the given AttributeSet
+     * @hide
+     */
+    @AnyRes
+    public static int getAttributeSetSourceResId(@Nullable AttributeSet set) {
+        return ResourcesImpl.getAttributeSetSourceResId(set);
+    }
+
     /**
      * This class holds the current attribute values for a particular theme.
      * In other words, a Theme is a set of values for resource attributes;

core/java/android/content/res/ResourcesImpl.java

@@ -15,6 +15,8 @@
  */
 package android.content.res;
 
+import static android.content.res.Resources.ID_NULL;
+
 import android.animation.Animator;
 import android.animation.StateListAnimator;
 import android.annotation.AnyRes;
@@ -1222,7 +1224,7 @@ public class ResourcesImpl {
                     for (int i = 0; i < num; i++) {
                         if (cachedXmlBlockCookies[i] == assetCookie && cachedXmlBlockFiles[i] != null
                                 && cachedXmlBlockFiles[i].equals(file)) {
-                            return cachedXmlBlocks[i].newParser();
+                            return cachedXmlBlocks[i].newParser(id);
                         }
                     }
 
@@ -1239,7 +1241,7 @@ public class ResourcesImpl {
                         cachedXmlBlockCookies[pos] = assetCookie;
                         cachedXmlBlockFiles[pos] = file;
                         cachedXmlBlocks[pos] = block;
-                        return block.newParser();
+                        return block.newParser(id);
                     }
                 }
             } catch (Exception e) {
@@ -1299,6 +1301,14 @@ public class ResourcesImpl {
         }
     }
 
+    @AnyRes
+    static int getAttributeSetSourceResId(@Nullable AttributeSet set) {
+        if (set == null) {
+            return ID_NULL;
+        }
+        return ((XmlBlock.Parser) set).getSourceResId();
+    }
+
     LongSparseArray<Drawable.ConstantState> getPreloadedDrawables() {
         return sPreloadedDrawables[0];
     }

core/java/android/content/res/XmlBlock.java

@@ -16,6 +16,9 @@
 
 package android.content.res;
 
+import static android.content.res.Resources.ID_NULL;
+
+import android.annotation.AnyRes;
 import android.annotation.Nullable;
 import android.annotation.UnsupportedAppUsage;
 import android.util.TypedValue;
@@ -73,19 +76,29 @@ final class XmlBlock implements AutoCloseable {
 
     @UnsupportedAppUsage
     public XmlResourceParser newParser() {
+        return newParser(ID_NULL);
+    }
+
+    public XmlResourceParser newParser(@AnyRes int resId) {
         synchronized (this) {
             if (mNative != 0) {
-                return new Parser(nativeCreateParseState(mNative), this);
+                return new Parser(nativeCreateParseState(mNative), this, resId);
             }
             return null;
         }
     }
 
     /*package*/ final class Parser implements XmlResourceParser {
-        Parser(long parseState, XmlBlock block) {
+        Parser(long parseState, XmlBlock block, @AnyRes int sourceResId) {
             mParseState = parseState;
             mBlock = block;
             block.mOpenCount++;
+            mSourceResId = sourceResId;
+        }
+
+        @AnyRes
+        public int getSourceResId() {
+            return mSourceResId;
         }
 
         public void setFeature(String name, boolean state) throws XmlPullParserException {
@@ -473,6 +486,7 @@ final class XmlBlock implements AutoCloseable {
         private boolean mDecNextDepth = false;
         private int mDepth = 0;
         private int mEventType = START_DOCUMENT;
+        private @AnyRes int mSourceResId;
     }
 
     protected void finalize() throws Throwable {

core/java/android/view/View.java

@@ -16,6 +16,7 @@
 
 package android.view;
 
+import static android.content.res.Resources.ID_NULL;
 import static android.view.ViewRootImpl.NEW_INSETS_MODE_FULL;
 import static android.view.accessibility.AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED;
 
@@ -5052,6 +5053,9 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
     @Nullable
     private WeakReference<ContentCaptureSession> mContentCaptureSession;
 
+    @LayoutRes
+    private int mSourceLayoutId = ID_NULL;
+
     /**
      * Simple constructor to use when creating a view from code.
      *
@@ -5217,6 +5221,8 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
     public View(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
         this(context);
 
+        mSourceLayoutId = Resources.getAttributeSetSourceResId(attrs);
+
         final TypedArray a = context.obtainStyledAttributes(
                 attrs, com.android.internal.R.styleable.View, defStyleAttr, defStyleRes);
 
@@ -23252,6 +23258,18 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
         }
     }
 
+    /**
+     * A {@link View} can be inflated from an XML layout. For such Views this method returns the
+     * resource ID of the source layout.
+     *
+     * @return The layout resource id if this view was inflated from XML, otherwise
+     * {@link Resources#ID_NULL}.
+     */
+    @LayoutRes
+    public int getSourceLayoutResId() {
+        return mSourceLayoutId;
+    }
+
     /**
      * Returns the top padding of this view.
      *