1 files changed, 81 insertions, 0 deletions
diff --git a/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/LayoutEditorMatchingStrategy.java b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/LayoutEditorMatchingStrategy.java
new file mode 100644
index 000000000..c1c606854
--- /dev/null
+++ b/eclipse/plugins/com.android.ide.eclipse.adt/src/com/android/ide/eclipse/adt/internal/editors/layout/LayoutEditorMatchingStrategy.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
+ *
+ * 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.adt.internal.editors.layout;
+
+import com.android.ide.common.resources.ResourceFolder;
+import com.android.ide.eclipse.adt.internal.editors.common.CommonXmlEditor;
+import com.android.ide.eclipse.adt.internal.resources.manager.ResourceManager;
+import com.android.resources.ResourceFolderType;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.ui.IEditorInput;
+import org.eclipse.ui.IEditorMatchingStrategy;
+import org.eclipse.ui.IEditorReference;
+import org.eclipse.ui.PartInitException;
+import org.eclipse.ui.part.FileEditorInput;
+
+/**
+ * Matching strategy for the Layout Editor. This is used to open all configurations of a layout
+ * in the same editor.
+ */
+public class LayoutEditorMatchingStrategy implements IEditorMatchingStrategy {
+
+    @Override
+    public boolean matches(IEditorReference editorRef, IEditorInput input) {
+        // first check that the file being opened is a layout file.
+        if (input instanceof FileEditorInput) {
+            FileEditorInput fileInput = (FileEditorInput)input;
+
+            // get the IFile object and check it's in one of the layout folders.
+            IFile file = fileInput.getFile();
+            ResourceManager manager = ResourceManager.getInstance();
+            ResourceFolder resFolder = manager.getResourceFolder(file);
+
+            // Per the IEditorMatchingStrategy documentation, editorRef.getEditorInput()
+            // is expensive so try exclude files that definitely don't match, such
+            // as those with the wrong extension or wrong file name
+            if (!file.getName().equals(editorRef.getName()) ||
+                    !editorRef.getId().equals(CommonXmlEditor.ID)) {
+                return false;
+            }
+
+            // if it's a layout, we now check the name of the fileInput against the name of the
+            // file being currently edited by the editor since those are independent of the config.
+            if (resFolder != null && resFolder.getType() == ResourceFolderType.LAYOUT) {
+                try {
+                    IEditorInput editorInput = editorRef.getEditorInput();
+                    if (editorInput instanceof FileEditorInput) {
+                        FileEditorInput editorFileInput = (FileEditorInput)editorInput;
+                        IFile editorFile = editorFileInput.getFile();
+
+                        ResourceFolder editorFolder = manager.getResourceFolder(editorFile);
+                        if (editorFolder == null
+                                || editorFolder.getType() != ResourceFolderType.LAYOUT) {
+                            return false;
+                        }
+
+                        return editorFile.getProject().equals(file.getProject())
+                            && editorFile.getName().equals(file.getName());
+                    }
+                } catch (PartInitException e) {
+                    // we do nothing, we'll just return false.
+                }
+            }
+        }
+        return false;
+    }
+}