1 files changed, 69 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/ListElementAddTransform.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/ListElementAddTransform.java
new file mode 100644
index 000000000..dcf50d7e8
--- /dev/null
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/ListElementAddTransform.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2012 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.eclipse.gltrace.state.transforms;
+
+import com.android.ide.eclipse.gltrace.state.GLListProperty;
+import com.android.ide.eclipse.gltrace.state.IGLProperty;
+
+/**
+ * A {@link ListElementAddTransform} provides the ability to add a new property to a list of
+ * properties in the GL State.
+ */
+public class ListElementAddTransform implements IStateTransform {
+    private final IGLPropertyAccessor mAccessor;
+    private final IGLProperty mElement;
+
+    public ListElementAddTransform(IGLPropertyAccessor accessor, IGLProperty element) {
+        mAccessor = accessor;
+        mElement = element;
+    }
+
+    @Override
+    public void apply(IGLProperty currentState) {
+        GLListProperty list = getList(currentState);
+        if (list != null) {
+            list.add(mElement);
+        }
+    }
+
+    @Override
+    public void revert(IGLProperty currentState) {
+        GLListProperty list = getList(currentState);
+        if (list != null) {
+            list.remove(mElement);
+        }
+    }
+
+    @Override
+    public IGLProperty getChangedProperty(IGLProperty currentState) {
+        return getList(currentState);
+    }
+
+    private GLListProperty getList(IGLProperty state) {
+        IGLProperty p = state;
+
+        if (mAccessor != null) {
+            p = mAccessor.getProperty(p);
+        }
+
+        if (p instanceof GLListProperty) {
+            return (GLListProperty) p;
+        } else {
+            return null;
+        }
+    }
+}