webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 71 insertions, 0 deletions

diff --git a/Source/WebInspectorUI/UserInterface/Models/WrappedPromise.js b/Source/WebInspectorUI/UserInterface/Models/WrappedPromise.js
new file mode 100644
index 000000000..a42253d26
--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/Models/WrappedPromise.js
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2015, 2016 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.WrappedPromise = class WrappedPromise
+{
+    constructor(work)
+    {
+        this._settled = false;
+        this._promise = new Promise((resolve, reject) => {
+            this._resolveCallback = resolve;
+            this._rejectCallback = reject;
+
+            // Allow work to resolve or reject the promise by shimming our
+            // internal callbacks. This ensures that this._settled gets set properly.
+            if (work && typeof work === "function")
+                return work(this.resolve.bind(this), this.reject.bind(this));
+        });
+    }
+
+    // Public
+
+    get settled()
+    {
+        return this._settled;
+    }
+
+    get promise()
+    {
+        return this._promise;
+    }
+
+    resolve(value)
+    {
+        if (this._settled)
+            throw new Error("Promise is already settled, cannot call resolve().");
+
+        this._settled = true;
+        this._resolveCallback(value);
+    }
+
+    reject(value)
+    {
+        if (this._settled)
+            throw new Error("Promise is already settled, cannot call reject().");
+
+        this._settled = true;
+        this._rejectCallback(value);
+    }
+};