[DevTools] Support JQuery event listeners

Source/devtools/front_end/sdk/EventListenerUtils.js

+// Copyright 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.
+
+/**
+ * @param {!WebInspector.RemoteObject} functionObject
+ * @return {!Promise<!WebInspector.RemoteObject>}
+ */
+WebInspector.targetFunction = function(functionObject)
+{
+    return new Promise(promiseConstructor);
+
+    /**
+     * @param {function(?)} fulfill
+     * @param {function(*)} reject
+     */
+    function promiseConstructor(fulfill, reject)
+    {
+        functionObject.getOwnProperties(ownPropertiesCallback);

[pfeldman, 2015/08/24 23:29:44]

You should promisify the getOwnProperties instead, place it in remote object.

+        function ownPropertiesCallback(properties, internalProperties)
+        {
+            if (internalProperties) {
+                for (var i = 0; i < internalProperties.length; ++i) {
+                    if (internalProperties[i].name === "[[TargetFunction]]") {
+                        fulfill(internalProperties[i].value);
+                        return;
+                    }
+                }
+            }
+            fulfill(functionObject);
+        }
+    }
+}
+
+/**
+ * @param {!WebInspector.RemoteObject} functionObject
+ * @return {!Promise<{functionObject: !WebInspector.RemoteObject, functionDetails: ?WebInspector.DebuggerModel.FunctionDetails}>}
+ */
+WebInspector.functionDetails = function(functionObject)
+{
+    return new Promise(promiseConstructor);
+
+    /**
+     * @param {function(?)} fulfill
+     * @param {function(*)} reject
+     */
+    function promiseConstructor(fulfill, reject)
+    {
+        if (!functionObject) {
+            fulfill({functionObject: null, functionDetails: null});
+            return;
+        }
+        functionObject.functionDetails(functionDetailsCallback);

[pfeldman, 2015/08/24 23:29:44]

ditto, pure promisification required.

+        /**
+         * @param {?WebInspector.DebuggerModel.FunctionDetails} functionDetails
+         */
+        function functionDetailsCallback(functionDetails)
+        {
+            fulfill({functionObject: functionObject, functionDetails: functionDetails});
+        }
+    }
+}
+
+/**
+ * @param {!WebInspector.RemoteObject} frameworkEventListener
+ * @return {!Promise<!WebInspector.EventListener>}
+ */
+WebInspector.buildEventListener = function(frameworkEventListener)

[pfeldman, 2015/08/24 23:29:44]

This should be a part of the event listeners view or widget, wherever it is
called..

+{
+    var promises = [frameworkEventListener.callFunctionJSONPromise(function(){ return this; }, undefined)];

[pfeldman, 2015/08/24 23:29:44]

Also hard to parse what it does, it uses inline functions, etc.

+    promises.push(frameworkEventListener.callFunctionPromise(effectiveFunction, undefined).then(targetFunction).then(WebInspector.functionDetails));
+    return Promise.all(promises).then(frameworkEventListenerCallback);
+
+    /**
+     * @param {!{object: ?WebInspector.RemoteObject, wasThrown: (boolean|undefined)}} result
+     * @return {!Promise<!WebInspector.RemoteObject>}
+     */
+    function targetFunction(result)
+    {
+        return WebInspector.targetFunction(/** @type {!WebInspector.RemoteObject} */(result.object));
+    }
+
+    /**
+     * @suppressReceiverCheck
+     * @this {Object}
+     * @return {function()}
+     */
+    function effectiveFunction()
+    {
+        if (typeof this.handler === "function")
+            return this.handler;
+        return typeof this.handler === "object" ? (this.handler.handlerEvent || this.handler.constructor) : null;
+    }
+
+    /**
+     * @param {!Array<*>} data
+     * @return {!WebInspector.EventListener}
+     */
+    function frameworkEventListenerCallback(data)
+    {
+        var listenerJSON = data[0];
+        var targetFunction = data[1];
+        return new WebInspector.EventListener(frameworkEventListener.target(), listenerJSON.type, listenerJSON.useCapture, targetFunction.functionDetails.location, targetFunction.functionObject, targetFunction.functionDetails.sourceURL);
+    }
+}
+
+/**
+ * @param {!{object: ?WebInspector.RemoteObject, wasThrown: (boolean|undefined)}} frameworkListenersResult
+ * @return {!Promise<?Array<!WebInspector.EventListener>>}
+ */
+WebInspector.castEventListeners = function(frameworkListenersResult)

[pfeldman, 2015/08/24 23:29:43]

move into widget, also impossible to tell what layout it adopts to what.

+{
+    if (frameworkListenersResult.wasThrown)
+        return /** @type{!Promise<?Array<!WebInspector.EventListener>>} */(Promise.resolve(null));
+    var frameworkListeners = frameworkListenersResult.object;
+    var promises = [];
+    for (var i = 0; i < frameworkListeners.arrayLength(); ++i)
+        promises.push(frameworkListeners.callFunctionPromise(function(idx){ return this[idx]; }, [WebInspector.RemoteObject.toCallArgument(i)]).then(buildEventListener));
+    return /** @type{!Promise<?Array<!WebInspector.EventListener>>} */(Promise.all(promises));
+
+    /**
+     * @param {!{object: ?WebInspector.RemoteObject, wasThrown: (boolean|undefined)}} result
+     * @return {!Promise<!WebInspector.EventListener>}
+     */
+     function buildEventListener(result)
+     {
+        return WebInspector.buildEventListener(/** @type {!WebInspector.RemoteObject} */(result.object));
+     }
+}
+
+
+/**
+ * @param {!{object: ?WebInspector.RemoteObject, wasThrown: (boolean|undefined)}} frameworkHandlersResult
+ * @return {!Promise<?Array<function()>>}
+ */
+WebInspector.castEventHandlers = function(frameworkHandlersResult)

[pfeldman, 2015/08/24 23:29:44]

ditto

+{
+    var frameworkHandlers = frameworkHandlersResult.object;
+    return new Promise(promiseConstructor);
+
+    /**
+     * @param {function(?)} fulfill
+     * @param {function(*)} reject
+     */
+    function promiseConstructor(fulfill, reject)
+    {
+        frameworkHandlers.callFunctionPromise(function(){ return new Set(); }, undefined).then(setCreated);
+
+        /**
+         * @param {!{object: ?WebInspector.RemoteObject, wasThrown: (boolean|undefined)}} setResult
+         */
+        function setCreated(setResult)
+        {
+            if (setResult.wasThrown) {
+                fulfill(null);
+                return;
+            }
+            var setObject = setResult.object;
+            var promises = [];
+            for (var i = 0; i < frameworkHandlers.arrayLength(); ++i)
+                promises.push(frameworkHandlers.callFunctionPromise(function(idx){ return this[idx]; }, [WebInspector.RemoteObject.toCallArgument(i)]).then(targetFunction).then(addToSet));
+            Promise.all(promises).then(returnSet);
+
+            /**
+             * @param {!{object: ?WebInspector.RemoteObject, wasThrown: (boolean|undefined)}} result
+             */
+            function targetFunction(result)
+            {
+                return WebInspector.targetFunction(/** @type {!WebInspector.RemoteObject}*/(result.object));
+            }
+
+            /**
+             * @param {!WebInspector.RemoteObject} targetFunctionObject
+             */
+            function addToSet(targetFunctionObject)
+            {
+                return setObject.callFunctionPromise(function(f){ this.add(f); }, [WebInspector.RemoteObject.toCallArgument(targetFunctionObject)]);
+            }
+
+            function returnSet()
+            {
+                fulfill(setObject);
+            }
+        }
+    }
+}
+
+
+/**
+ * @return {!Array<!{handler:function(), useCapture: boolean, type:string}>}
+ * @this {Object}
+ */
+function devtoolsFrameworkEventListeners()

[pfeldman, 2015/08/24 23:29:44]

ditto

+{
+    var listeners = [];
+    var getters = [jQueryEventListeners];
+    try {
+        if (isArrayLike(self.devtoolsFrameworkEventListeners))
+            getters = getters.concat(self.devtoolsFrameworkEventListeners);
+    } catch (e) {
+    }
+
+    for (var i = 0; i < getters.length; ++i) {
+        try {
+            listeners = listeners.concat(getters[i](this));
+        } catch (e) {
+        }
+    }
+    return listeners;
+
+    /**
+     * @param {?Object} obj
+     * @return {boolean}
+     */
+    function isArrayLike(obj)
+    {
+        if (!obj || typeof obj !== "object")
+            return false;
+        try {
+            if (typeof obj.splice === "function") {
+                var len = obj.length;
+                return typeof len === "number" && (len >>> 0 === len && (len > 0 || 1 / len > 0));
+            }
+        } catch (e) {
+        }
+        return false;
+    }
+
+    /**
+     * @param {?Object} node
+     * @return {!Array<!{handler:function(), useCapture: boolean, type:string}>}
+     */
+    function jQueryEventListeners(node)
+    {
+        if (!node || !(node instanceof Node))
+            return [];
+        var hasJQuery = (typeof jQuery !== 'undefined') && jQuery.fn;
+        if (!hasJQuery)
+            return [];
+        var listeners = [];
+        var data = jQuery._data || jQuery.data;
+        if (typeof data === "function") {
+            var events = data(node, "events");
+            for (var type in events) {
+                for (var key in events[type]) {
+                    var frameworkListener = events[type][key];
+                    if (typeof frameworkListener === "object" || typeof frameworkListener === "function") {
+                        var listener = {
+                            handler: frameworkListener.handler || frameworkListener,
+                            useCapture: true,
+                            type: type
+                        };
+                        listeners.push(listener);
+                    }
+                }
+            }
+        }
+        var entry = jQuery(node)[0];
+        if (entry) {
+            var entryEvents = entry["$events"];
+            for (var type in entryEvents) {
+                var events = entryEvents[type];
+                for (var key in events) {
+                    if (typeof events[key] === "function") {
+                        var listener = {
+                            handler: events[key],
+                            useCapture: true,
+                            type: type
+                        };
+                        listeners.push(listener);
+                    }
+                }
+            }
+        }
+        return listeners;
+    }
+}
+
+/**
+ * @return {!Array<function()>}
+ * @this {Object}
+ */
+function devtoolsFrameworkInternalHandlers()

[pfeldman, 2015/08/24 23:29:44]

ditto

+{
+    var handlers = [];
+    var getters = [jQueryInternalHandlers];
+    try {
+        if (isArrayLike(self.devtoolsFrameworkInternalHandlers))
+            getters = getters.concat(self.devtoolsFrameworkInternalHandlers);
+    } catch (e) {
+    }
+
+    for (var i = 0; i < getters.length; ++i) {
+        try {
+            handlers = handlers.concat(getters[i](this));
+        } catch (e) {
+        }
+    }
+    return handlers;
+
+    /**
+     * @param {?Object} obj
+     * @return {boolean}
+     */
+    function isArrayLike(obj)
+    {
+        if (!obj || typeof obj !== "object")
+            return false;
+        try {
+            if (typeof obj.splice === "function") {
+                var len = obj.length;
+                return typeof len === "number" && (len >>> 0 === len && (len > 0 || 1 / len > 0));
+            }
+        } catch (e) {
+        }
+        return false;
+    }
+
+    /**
+     * @param {?Object} node
+     * @return {!Array<function()>}
+     */
+    function jQueryInternalHandlers(node)
+    {
+        if (!(node instanceof Node))
+            return [];
+        var hasJQuery = (typeof jQuery !== 'undefined') && jQuery.fn;
+        if (!hasJQuery)
+            return [];
+        var handlers = [];
+        var data = jQuery._data || jQuery.data;
+        if (typeof data === "function") {
+            var nodeData = data(node);
+            if (typeof nodeData.handle === "function")
+                handlers.push(nodeData.handle);
+        }
+        var entry = jQuery(node)[0];
+        if (entry && entry["$handle"])
+            handlers.push(entry["$handle"]);
+        return handlers;
+    }
+}