Devtools Animations: Add cubic bezier easing editor for animations

Source/devtools/front_end/ui/EditorPopoverHelper.js

Index: Source/devtools/front_end/ui/EditorPopoverHelper.js
diff --git a/Source/devtools/front_end/ui/EditorPopoverHelper.js b/Source/devtools/front_end/ui/EditorPopoverHelper.js
new file mode 100644
index 0000000000000000000000000000000000000000..a11a420fb2b3db0ef80be6ba7349a4a00a4fb8a1
--- /dev/null
+++ b/Source/devtools/front_end/ui/EditorPopoverHelper.js
@@ -0,0 +1,142 @@
+// Copyright (c) 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @constructor
+ * @extends {WebInspector.Object}
+ */
+WebInspector.EditorPopoverHelper = function()
+{
+    this._popover = new WebInspector.Popover();
+    this._popover.setCanShrink(false);
+    this._popover.setNoMargins(true);
+    this._popover.element.addEventListener("mousedown", consumeEvent, false);
+
+    this._hideProxy = this.hide.bind(this, true);
+    this._boundOnKeyDown = this._onKeyDown.bind(this);
+    this._repositionBound = this._reposition.bind(this);
+    this._boundFocusOut = this._onFocusOut.bind(this);
+}
+
+WebInspector.EditorPopoverHelper.prototype = {
+    /**
+     * @param {!Event} event
+     */
+    _onFocusOut: function(event)
+    {
+        if (!event.relatedTarget || event.relatedTarget.isSelfOrDescendant(this._view.contentElement))
+            return;
+        this._hideProxy();
+    },
+
+    /**
+     * @return {boolean}
+     */
+    isShowing: function()
+    {
+        return this._popover.isShowing();
+    },
+
+    /**
+     * @return {?Element}
+     */
+    anchorElement: function()

[dgozman, 2015/05/28 11:04:03]

Who uses this?

[samli, 2015/05/28 11:48:14]

I used this in AnimationTimeline to allow us to reuse the same
EditorPopoverHelper but close and immediately reopen on a different
anchorElement.

+    {
+        return this._anchorElement;
+    },
+
+    /**
+     * @param {!WebInspector.Widget} view
+     * @param {!Element} anchorElement
+     * @param {function(boolean)=} hiddenCallback
+     */
+    show: function(view, anchorElement, hiddenCallback)
+    {
+        if (this._popover.isShowing()) {
+            if (this._anchorElement === anchorElement)
+                return;
+
+            // Reopen the picker for another anchor element.
+            this.hide(true);
+        }
+
+        delete this._isHidden;
+        this._anchorElement = anchorElement;
+        this._view = view;
+        this._hiddenCallback = hiddenCallback;
+        this._reposition();
+
+        var document = this._popover.element.ownerDocument;
+        document.addEventListener("mousedown", this._hideProxy, false);
+        document.defaultView.addEventListener("resize", this._hideProxy, false);
+        this._view.contentElement.addEventListener("keydown", this._boundOnKeyDown, false);
+
+        this._scrollerElement = anchorElement.enclosingNodeOrSelfWithClass("style-panes-wrapper");

[dgozman, 2015/05/28 11:04:03]

I guess this doesn't work in animation timeline. We should pass it as a
parameter.

[samli, 2015/05/29 04:32:11]

Done.

+        if (this._scrollerElement)
+            this._scrollerElement.addEventListener("scroll", this._repositionBound, false);
+    },
+
+    /**
+     * @param {!Event=} event
+     */
+    _reposition: function(event)
+    {
+        if (!this._previousFocusElement)
+            this._previousFocusElement = WebInspector.currentFocusElement();
+        // Unbind "blur" listener to avoid reenterability: |popover.showView| will hide the popover and trigger it synchronously.
+        this._view.contentElement.removeEventListener("focusout", this._boundFocusOut, false);
+        this._popover.showView(this._view, this._anchorElement);
+        this._view.contentElement.addEventListener("focusout", this._boundFocusOut, false);
+        WebInspector.setCurrentFocusElement(this._view.contentElement);
+    },
+
+    /**
+     * @param {boolean=} commitEdit
+     */
+    hide: function(commitEdit)
+    {
+        if (this._isHidden)
+            return;
+        var document = this._popover.element.ownerDocument;
+        this._isHidden = true;
+        this._popover.hide();
+
+        if (this._scrollerElement)
+            this._scrollerElement.removeEventListener("scroll", this._repositionBound, false);
+
+        document.removeEventListener("mousedown", this._hideProxy, false);
+        document.defaultView.removeEventListener("resize", this._hideProxy, false);
+
+        if (this._hiddenCallback)
+            this._hiddenCallback.call(null, !!commitEdit);
+
+        WebInspector.setCurrentFocusElement(this._previousFocusElement);
+        delete this._previousFocusElement;
+        delete this._anchorElement;
+        if (this._view) {
+            this._view.detach();
+            this._view.contentElement.removeEventListener("keydown", this._boundOnKeyDown, false);
+            this._view.contentElement.removeEventListener("focusout", this._boundFocusOut, false);
+            delete this._view;
+        }
+    },
+
+    /**
+     * @param {!Event} event
+     */
+    _onKeyDown: function(event)
+    {
+        if (event.keyIdentifier === "Enter") {
+            this.hide(true);
+            event.consume(true);
+            return;
+        }
+        if (event.keyIdentifier === "U+001B") { // Escape key
+            this.hide(false);
+            event.consume(true);
+        }
+    },
+
+    __proto__: WebInspector.Object.prototype
+}