LayoutLib API refactoring

Change-Id: I40abba4c4f786755c2a1c0e70df4d7bc08e2bcde

1 files changed, 74 insertions, 0 deletions

diff --git a/layoutlib_api/src/com/android/ide/common/rendering/api/IProjectCallback.java b/layoutlib_api/src/com/android/ide/common/rendering/api/IProjectCallback.java
new file mode 100644
index 0000000..67e082e
--- /dev/null
+++ b/layoutlib_api/src/com/android/ide/common/rendering/api/IProjectCallback.java
@@ -0,0 +1,74 @@
+/*
+ * 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.ide.common.rendering.api;
+
+/**
+ * Callback for project information needed by the Layout Library.
+ * Classes implementing this interface provide methods giving access to some project data, like
+ * resource resolution, namespace information, and instantiation of custom view.
+ */
+public interface IProjectCallback {
+
+    /**
+     * Loads a custom view with the given constructor signature and arguments.
+     * @param name The fully qualified name of the class.
+     * @param constructorSignature The signature of the class to use
+     * @param constructorArgs The arguments to use on the constructor
+     * @return A newly instantiated android.view.View object.
+     * @throws ClassNotFoundException
+     * @throws Exception
+     */
+    @SuppressWarnings("unchecked")
+    Object loadView(String name, Class[] constructorSignature, Object[] constructorArgs)
+        throws ClassNotFoundException, Exception;
+
+    /**
+     * Returns the namespace of the application.
+     * <p/>This lets the Layout Lib load custom attributes for custom views.
+     */
+    String getNamespace();
+
+    /**
+     * Resolves the id of a resource Id.
+     * <p/>The resource id is the value of a <code>R.&lt;type&gt;.&lt;name&gt;</code>, and
+     * this method will return both the type and name of the resource.
+     * @param id the Id to resolve.
+     * @return an array of 2 strings containing the resource name and type, or null if the id
+     * does not match any resource.
+     */
+    String[] resolveResourceValue(int id);
+
+    /**
+     * Resolves the id of a resource Id of type int[]
+     * <p/>The resource id is the value of a R.styleable.&lt;name&gt;, and this method will
+     * return the name of the resource.
+     * @param id the Id to resolve.
+     * @return the name of the resource or <code>null</code> if not found.
+     */
+    String resolveResourceValue(int[] id);
+
+    /**
+     * Returns the id of a resource.
+     * <p/>The provided type and name must match an existing constant defined as
+     * <code>R.&lt;type&gt;.&lt;name&gt;</code>.
+     * @param type the type of the resource
+     * @param name the name of the resource
+     * @return an Integer containing the resource Id, or <code>null</code> if not found.
+     */
+    Integer getResourceValue(String type, String name);
+
+}