Create Density based resource values when needed.

This will let the layoutlib know when to scale bitmaps
that are not in the native density of the rendering.

Change-Id: I08c99666460b5b5a3ed8d0aac7fa1b7c0136fd6b

tools/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/resources/configurations/PixelDensityQualifier.java

@@ -17,6 +17,7 @@
 package com.android.ide.eclipse.adt.internal.resources.configurations;
 
 import com.android.ide.eclipse.adt.internal.editors.IconFactory;
+import com.android.layoutlib.api.IDensityBasedResourceValue;
 import com.android.sdklib.AndroidVersion;
 import com.android.sdklib.IAndroidTarget;
 
@@ -39,19 +40,22 @@ public final class PixelDensityQualifier extends ResourceQualifier {
      * Screen Orientation enum.
      */
     public static enum Density {
-        HIGH("hdpi", 240, "High Density"), //$NON-NLS-1$
-        MEDIUM("mdpi", 160, "Medium Density"), //$NON-NLS-1$
-        LOW("ldpi", 120, "Low Density"), //$NON-NLS-1$
-        NODPI("nodpi", -1, "No Density"); //$NON-NLS-1$
+        HIGH("hdpi", 240, "High Density", IDensityBasedResourceValue.Density.HIGH), //$NON-NLS-1$
+        MEDIUM("mdpi", 160, "Medium Density", IDensityBasedResourceValue.Density.MEDIUM), //$NON-NLS-1$
+        LOW("ldpi", 120, "Low Density", IDensityBasedResourceValue.Density.LOW), //$NON-NLS-1$
+        NODPI("nodpi", -1, "No Density", IDensityBasedResourceValue.Density.NODPI); //$NON-NLS-1$
 
         private final String mValue;
         private final String mDisplayValue;
         private final int mDpiValue;
+        private final IDensityBasedResourceValue.Density mDensity;
 
-        private Density(String value, int dpiValue, String displayValue) {
+        private Density(String value, int dpiValue, String displayValue,
+                IDensityBasedResourceValue.Density density) {
             mValue = value;
             mDpiValue = dpiValue;
             mDisplayValue = displayValue;
+            mDensity = density;
         }
 
         /**
@@ -109,6 +113,14 @@ public final class PixelDensityQualifier extends ResourceQualifier {
             return mDisplayValue;
         }
 
+        /**
+         * Returns the {@link com.android.layoutlib.api.IDensityBasedResourceValue.Density} value
+         * associated to this {@link Density}.
+         */
+        public IDensityBasedResourceValue.Density getDensity() {
+            return mDensity;
+        }
+
         public static int getIndex(Density value) {
             int i = 0;
             for (Density input : values()) {

tools/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/resources/manager/SingleResourceFile.java

@@ -17,8 +17,10 @@
 package com.android.ide.eclipse.adt.internal.resources.manager;
 
 import com.android.ide.eclipse.adt.internal.resources.ResourceType;
+import com.android.ide.eclipse.adt.internal.resources.configurations.PixelDensityQualifier;
 import com.android.ide.eclipse.adt.internal.resources.manager.files.IAbstractFile;
 import com.android.layoutlib.api.IResourceValue;
+import com.android.layoutlib.utils.DensityBasedResourceValue;
 import com.android.layoutlib.utils.ResourceValue;
 
 import java.util.ArrayList;
@@ -66,8 +68,16 @@ public class SingleResourceFile extends ResourceFile {
         // compute the resource name
         mResourceName = getResourceName(mType);
 
-        mValue = new ResourceValue(mType.getName(), getResourceName(mType), file.getOsLocation(),
-                isFramework());
+        // test if there's a density qualifier associated with the resource
+        PixelDensityQualifier qualifier = folder.getConfiguration().getPixelDensityQualifier();
+
+        if (qualifier == null) {
+            mValue = new ResourceValue(mType.getName(), getResourceName(mType),
+                    file.getOsLocation(), isFramework());
+        } else {
+            mValue = new DensityBasedResourceValue(mType.getName(), getResourceName(mType),
+                    file.getOsLocation(), qualifier.getValue().getDensity(), isFramework());
+        }
     }
 
     @Override

tools/layoutlib_utils/src/com/android/layoutlib/utils/DensityBasedResourceValue.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2008 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.layoutlib.utils;
+
+import com.android.layoutlib.api.IDensityBasedResourceValue;
+
+public class DensityBasedResourceValue extends ResourceValue implements IDensityBasedResourceValue {
+
+    private Density mDensity;
+
+    public DensityBasedResourceValue(String type, String name, String value, Density density,
+            boolean isFramework) {
+        super(type, name, value, isFramework);
+        mDensity = density;
+    }
+
+    public Density getDensity() {
+        return mDensity;
+    }
+}