From 54b6cfa9a9e5b861a9930af873580d6dc20f773c Mon Sep 17 00:00:00 2001
From: The Android Open Source Project <initial-contribution@android.com>
Date: Tue, 21 Oct 2008 07:00:00 -0700
Subject: Initial Contribution

---
 core/java/android/view/ContextThemeWrapper.java | 103 ++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 core/java/android/view/ContextThemeWrapper.java

(limited to 'core/java/android/view/ContextThemeWrapper.java')

diff --git a/core/java/android/view/ContextThemeWrapper.java b/core/java/android/view/ContextThemeWrapper.java
new file mode 100644
index 0000000..2045a98
--- /dev/null
+++ b/core/java/android/view/ContextThemeWrapper.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2006 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 android.view;
+
+import android.content.Context;
+import android.content.ContextWrapper;
+import android.content.res.Resources;
+
+/**
+ * A ContextWrapper that allows you to modify the theme from what is in the 
+ * wrapped context. 
+ */
+public class ContextThemeWrapper extends ContextWrapper {
+    private Context mBase;
+    private int mThemeResource;
+    private Resources.Theme mTheme;
+    private LayoutInflater mInflater;
+
+    public ContextThemeWrapper() {
+        super(null);
+    }
+    
+    public ContextThemeWrapper(Context base, int themeres) {
+        super(base);
+        mBase = base;
+        mThemeResource = themeres;
+    }
+
+    @Override protected void attachBaseContext(Context newBase) {
+        super.attachBaseContext(newBase);
+        mBase = newBase;
+    }
+    
+    @Override public void setTheme(int resid) {
+        mThemeResource = resid;
+        initializeTheme();
+    }
+    
+    @Override public Resources.Theme getTheme() {
+        if (mTheme != null) {
+            return mTheme;
+        }
+
+        if (mThemeResource == 0) {
+            mThemeResource = com.android.internal.R.style.Theme;
+        }
+        initializeTheme();
+
+        return mTheme;
+    }
+
+    @Override public Object getSystemService(String name) {
+        if (LAYOUT_INFLATER_SERVICE.equals(name)) {
+            if (mInflater == null) {
+                mInflater = LayoutInflater.from(mBase).cloneInContext(this);
+            }
+            return mInflater;
+        }
+        return mBase.getSystemService(name);
+    }
+    
+    /**
+     * Called by {@link #setTheme} and {@link #getTheme} to apply a theme
+     * resource to the current Theme object.  Can override to change the
+     * default (simple) behavior.  This method will not be called in multiple
+     * threads simultaneously.
+     *
+     * @param theme The Theme object being modified.
+     * @param resid The theme style resource being applied to <var>theme</var>.
+     * @param first Set to true if this is the first time a style is being
+     *              applied to <var>theme</var>.
+     */
+    protected void onApplyThemeResource(Resources.Theme theme, int resid, boolean first) {
+        theme.applyStyle(resid, true);
+    }
+
+    private void initializeTheme() {
+        final boolean first = mTheme == null;
+        if (first) {
+            mTheme = getResources().newTheme();
+            Resources.Theme theme = mBase.getTheme();
+            if (theme != null) {
+                mTheme.setTo(theme);
+            }
+        }
+        onApplyThemeResource(mTheme, mThemeResource, first);
+    }
+}
+
-- 
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