1 files changed, 149 insertions, 0 deletions
diff --git a/Source/WebInspectorUI/UserInterface/Branch.js b/Source/WebInspectorUI/UserInterface/Branch.js
new file mode 100644
index 000000000..87e97c079
--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/Branch.js
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WebInspector.Branch = function(displayName, revisions, locked)
+{
+    WebInspector.Object.call(this);
+
+    console.assert(displayName);
+
+    this._displayName = displayName;
+    this._revisions = revisions instanceof Array ? revisions.slice() : [];
+    this._locked = locked || false;
+};
+
+WebInspector.Branch.prototype = {
+    constructor: WebInspector.Branch,
+
+    // Public
+
+    get displayName()
+    {
+        return this._displayName;
+    },
+
+    set displayName(displayName)
+    {
+        console.assert(displayName);
+        if (!displayName)
+            return;
+
+        this._displayName = displayName;
+    },
+
+    get revisions()
+    {
+        return this._revisions;
+    },
+
+    get locked()
+    {
+        return this._locked;
+    },
+
+    revisionForRepresentedObject: function(representedObject, doNotCreateIfNeeded)
+    {
+        for (var i = 0; i < this._revisions.length; ++i) {
+            var revision = this._revisions[i];
+            if (revision instanceof WebInspector.SourceCodeRevision && revision.sourceCode === representedObject)
+                return revision;
+        }
+
+        if (doNotCreateIfNeeded)
+            return null;
+
+        if (representedObject instanceof WebInspector.SourceCode) {
+            var revision = representedObject.originalRevision.copy();
+            representedObject.currentRevision = revision;
+            this.addRevision(revision);
+            return revision;
+        }
+
+        return null;
+    },
+
+    addRevision: function(revision)
+    {
+        console.assert(revision instanceof WebInspector.Revision);
+
+        if (this._locked)
+            return;
+
+        if (this._revisions.contains(revision))
+            return;
+
+        this._revisions.push(revision);
+    },
+
+    removeRevision: function(revision)
+    {
+        console.assert(revision instanceof WebInspector.Revision);
+
+        if (this._locked)
+            return;
+
+        this._revisions.remove(revision);
+    },
+
+    reset: function()
+    {
+        if (this._locked)
+            return;
+
+        this._revisions = [];
+    },
+
+    fork: function(displayName)
+    {
+        var copiedRevisions = this._revisions.map(function(revision) { return revision.copy(); });
+        return new WebInspector.Branch(displayName, copiedRevisions);
+    },
+
+    apply: function()
+    {
+        for (var i = 0; i < this._revisions.length; ++i)
+            this._revisions[i].apply();
+    },
+
+    revert: function()
+    {
+        for (var i = this._revisions.length - 1; i >= 0; --i)
+            this._revisions[i].revert();
+    },
+
+    lock: function()
+    {
+        console.assert(!this._locked);
+        this._locked = true;
+    },
+
+    unlock: function()
+    {
+        console.assert(this._locked);
+        this._locked = false;
+    }
+};
+
+WebInspector.Branch.prototype.__proto__ = WebInspector.Object.prototype;