diff options
Diffstat (limited to 'devtools/server/actors/inspector/event-collector.js')
| -rw-r--r-- | devtools/server/actors/inspector/event-collector.js | 1069 |
1 files changed, 1069 insertions, 0 deletions
diff --git a/devtools/server/actors/inspector/event-collector.js b/devtools/server/actors/inspector/event-collector.js new file mode 100644 index 0000000000..4ee8dc388f --- /dev/null +++ b/devtools/server/actors/inspector/event-collector.js @@ -0,0 +1,1069 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// This file contains event collectors that are then used by developer tools in +// order to find information about events affecting an HTML element. + +"use strict"; + +const { + isAfterPseudoElement, + isBeforePseudoElement, + isMarkerPseudoElement, + isNativeAnonymous, +} = require("resource://devtools/shared/layout/utils.js"); +const Debugger = require("Debugger"); +const { + EXCLUDED_LISTENER, +} = require("resource://devtools/server/actors/inspector/constants.js"); + +// eslint-disable-next-line +const JQUERY_LIVE_REGEX = + /return typeof \w+.*.event\.triggered[\s\S]*\.event\.(dispatch|handle).*arguments/; + +const REACT_EVENT_NAMES = [ + "onAbort", + "onAnimationEnd", + "onAnimationIteration", + "onAnimationStart", + "onAuxClick", + "onBeforeInput", + "onBlur", + "onCanPlay", + "onCanPlayThrough", + "onCancel", + "onChange", + "onClick", + "onClose", + "onCompositionEnd", + "onCompositionStart", + "onCompositionUpdate", + "onContextMenu", + "onCopy", + "onCut", + "onDoubleClick", + "onDrag", + "onDragEnd", + "onDragEnter", + "onDragExit", + "onDragLeave", + "onDragOver", + "onDragStart", + "onDrop", + "onDurationChange", + "onEmptied", + "onEncrypted", + "onEnded", + "onError", + "onFocus", + "onGotPointerCapture", + "onInput", + "onInvalid", + "onKeyDown", + "onKeyPress", + "onKeyUp", + "onLoad", + "onLoadStart", + "onLoadedData", + "onLoadedMetadata", + "onLostPointerCapture", + "onMouseDown", + "onMouseEnter", + "onMouseLeave", + "onMouseMove", + "onMouseOut", + "onMouseOver", + "onMouseUp", + "onPaste", + "onPause", + "onPlay", + "onPlaying", + "onPointerCancel", + "onPointerDown", + "onPointerEnter", + "onPointerLeave", + "onPointerMove", + "onPointerOut", + "onPointerOver", + "onPointerUp", + "onProgress", + "onRateChange", + "onReset", + "onScroll", + "onSeeked", + "onSeeking", + "onSelect", + "onStalled", + "onSubmit", + "onSuspend", + "onTimeUpdate", + "onToggle", + "onTouchCancel", + "onTouchEnd", + "onTouchMove", + "onTouchStart", + "onTransitionEnd", + "onVolumeChange", + "onWaiting", + "onWheel", + "onAbortCapture", + "onAnimationEndCapture", + "onAnimationIterationCapture", + "onAnimationStartCapture", + "onAuxClickCapture", + "onBeforeInputCapture", + "onBlurCapture", + "onCanPlayCapture", + "onCanPlayThroughCapture", + "onCancelCapture", + "onChangeCapture", + "onClickCapture", + "onCloseCapture", + "onCompositionEndCapture", + "onCompositionStartCapture", + "onCompositionUpdateCapture", + "onContextMenuCapture", + "onCopyCapture", + "onCutCapture", + "onDoubleClickCapture", + "onDragCapture", + "onDragEndCapture", + "onDragEnterCapture", + "onDragExitCapture", + "onDragLeaveCapture", + "onDragOverCapture", + "onDragStartCapture", + "onDropCapture", + "onDurationChangeCapture", + "onEmptiedCapture", + "onEncryptedCapture", + "onEndedCapture", + "onErrorCapture", + "onFocusCapture", + "onGotPointerCaptureCapture", + "onInputCapture", + "onInvalidCapture", + "onKeyDownCapture", + "onKeyPressCapture", + "onKeyUpCapture", + "onLoadCapture", + "onLoadStartCapture", + "onLoadedDataCapture", + "onLoadedMetadataCapture", + "onLostPointerCaptureCapture", + "onMouseDownCapture", + "onMouseEnterCapture", + "onMouseLeaveCapture", + "onMouseMoveCapture", + "onMouseOutCapture", + "onMouseOverCapture", + "onMouseUpCapture", + "onPasteCapture", + "onPauseCapture", + "onPlayCapture", + "onPlayingCapture", + "onPointerCancelCapture", + "onPointerDownCapture", + "onPointerEnterCapture", + "onPointerLeaveCapture", + "onPointerMoveCapture", + "onPointerOutCapture", + "onPointerOverCapture", + "onPointerUpCapture", + "onProgressCapture", + "onRateChangeCapture", + "onResetCapture", + "onScrollCapture", + "onSeekedCapture", + "onSeekingCapture", + "onSelectCapture", + "onStalledCapture", + "onSubmitCapture", + "onSuspendCapture", + "onTimeUpdateCapture", + "onToggleCapture", + "onTouchCancelCapture", + "onTouchEndCapture", + "onTouchMoveCapture", + "onTouchStartCapture", + "onTransitionEndCapture", + "onVolumeChangeCapture", + "onWaitingCapture", + "onWheelCapture", +]; + +/** + * The base class that all the enent collectors should be based upon. + */ +class MainEventCollector { + /** + * We allow displaying chrome events if the page is chrome or if + * `devtools.chrome.enabled = true`. + */ + get chromeEnabled() { + if (typeof this._chromeEnabled === "undefined") { + this._chromeEnabled = Services.prefs.getBoolPref( + "devtools.chrome.enabled" + ); + } + + return this._chromeEnabled; + } + + /** + * Check if a node has any event listeners attached. Please do not override + * this method... your getListeners() implementation needs to have the + * following signature: + * `getListeners(node, {checkOnly} = {})` + * + * @param {DOMNode} node + * The not for which we want to check for event listeners. + * @return {Boolean} + * true if the node has event listeners, false otherwise. + */ + hasListeners(node) { + return this.getListeners(node, { + checkOnly: true, + }); + } + + /** + * Get all listeners for a node. This method must be overridden. + * + * @param {DOMNode} node + * The not for which we want to get event listeners. + * @param {Object} options + * An object for passing in options. + * @param {Boolean} [options.checkOnly = false] + * Don't get any listeners but return true when the first event is + * found. + * @return {Array} + * An array of event handlers. + */ + getListeners(node, { checkOnly }) { + throw new Error("You have to implement the method getListeners()!"); + } + + /** + * Get unfiltered DOM Event listeners for a node. + * NOTE: These listeners may contain invalid events and events based + * on C++ rather than JavaScript. + * + * @param {DOMNode} node + * The node for which we want to get unfiltered event listeners. + * @return {Array} + * An array of unfiltered event listeners or an empty array + */ + getDOMListeners(node) { + let listeners; + if ( + typeof node.nodeName !== "undefined" && + node.nodeName.toLowerCase() === "html" + ) { + const winListeners = + Services.els.getListenerInfoFor(node.ownerGlobal) || []; + const docElementListeners = Services.els.getListenerInfoFor(node) || []; + const docListeners = + Services.els.getListenerInfoFor(node.parentNode) || []; + + listeners = [...winListeners, ...docElementListeners, ...docListeners]; + } else { + listeners = Services.els.getListenerInfoFor(node) || []; + } + + return listeners.filter(listener => { + const obj = this.unwrap(listener.listenerObject); + return !obj || !obj[EXCLUDED_LISTENER]; + }); + } + + getJQuery(node) { + if (Cu.isDeadWrapper(node)) { + return null; + } + + const global = this.unwrap(node.ownerGlobal); + if (!global) { + return null; + } + + const hasJQuery = global.jQuery?.fn?.jquery; + + if (hasJQuery) { + return global.jQuery; + } + return null; + } + + unwrap(obj) { + return Cu.isXrayWrapper(obj) ? obj.wrappedJSObject : obj; + } + + isChromeHandler(handler) { + try { + const handlerPrincipal = Cu.getObjectPrincipal(handler); + + // Chrome codebase may register listeners on the page from a frame script or + // JSM <video> tags may also report internal listeners, but they won't be + // coming from the system principal. Instead, they will be using an expanded + // principal. + return ( + handlerPrincipal.isSystemPrincipal || + handlerPrincipal.isExpandedPrincipal + ); + } catch (e) { + // Anything from a dead object to a CSP error can leave us here so let's + // return false so that we can fail gracefully. + return false; + } + } +} + +/** + * Get or detect DOM events. These may include DOM events created by libraries + * that enable their custom events to work. At this point we are unable to + * effectively filter them as they may be proxied or wrapped. Although we know + * there is an event, we may not know the true contents until it goes + * through `processHandlerForEvent()`. + */ +class DOMEventCollector extends MainEventCollector { + getListeners(node, { checkOnly } = {}) { + const handlers = []; + const listeners = this.getDOMListeners(node); + + for (const listener of listeners) { + // Ignore listeners without a type, e.g. + // node.addEventListener("", function() {}) + if (!listener.type) { + continue; + } + + // Get the listener object, either a Function or an Object. + const obj = listener.listenerObject; + + // Ignore listeners without any listener, e.g. + // node.addEventListener("mouseover", null); + if (!obj) { + continue; + } + + let handler = null; + + // An object without a valid handleEvent is not a valid listener. + if (typeof obj === "object") { + const unwrapped = this.unwrap(obj); + if (typeof unwrapped.handleEvent === "function") { + handler = Cu.unwaiveXrays(unwrapped.handleEvent); + } + } else if (typeof obj === "function") { + // Ignore DOM events used to trigger jQuery events as they are only + // useful to the developers of the jQuery library. + if (JQUERY_LIVE_REGEX.test(obj.toString())) { + continue; + } + // Otherwise, the other valid listener type is function. + handler = obj; + } + + // Ignore listeners that have no handler. + if (!handler) { + continue; + } + + // If we shouldn't be showing chrome events due to context and this is a + // chrome handler we can ignore it. + if (!this.chromeEnabled && this.isChromeHandler(handler)) { + continue; + } + + // If this is checking if a node has any listeners then we have found one + // so return now. + if (checkOnly) { + return true; + } + + const eventInfo = { + nsIEventListenerInfo: listener, + capturing: listener.capturing, + type: listener.type, + handler, + enabled: listener.enabled, + }; + + handlers.push(eventInfo); + } + + // If this is checking if a node has any listeners then none were found so + // return false. + if (checkOnly) { + return false; + } + + return handlers; + } +} + +/** + * Get or detect jQuery events. + */ +class JQueryEventCollector extends MainEventCollector { + // eslint-disable-next-line complexity + getListeners(node, { checkOnly } = {}) { + const jQuery = this.getJQuery(node); + const handlers = []; + + // If jQuery is not on the page, if this is an anonymous node or a pseudo + // element we need to return early. + if ( + !jQuery || + isNativeAnonymous(node) || + isMarkerPseudoElement(node) || + isBeforePseudoElement(node) || + isAfterPseudoElement(node) + ) { + if (checkOnly) { + return false; + } + return handlers; + } + + let eventsObj = null; + const data = jQuery._data || jQuery.data; + + if (data) { + // jQuery 1.2+ + try { + eventsObj = data(node, "events"); + } catch (e) { + // We have no access to a JS object. This is probably due to a CORS + // violation. Using try / catch is the only way to avoid this error. + } + } else { + // JQuery 1.0 & 1.1 + let entry; + try { + entry = entry = jQuery(node)[0]; + } catch (e) { + // We have no access to a JS object. This is probably due to a CORS + // violation. Using try / catch is the only way to avoid this error. + } + + if (!entry || !entry.events) { + if (checkOnly) { + return false; + } + return handlers; + } + + eventsObj = entry.events; + } + + if (eventsObj) { + for (const [type, events] of Object.entries(eventsObj)) { + for (const [, event] of Object.entries(events)) { + // Skip events that are part of jQueries internals. + if (node.nodeType == node.DOCUMENT_NODE && event.selector) { + continue; + } + + if (typeof event === "function" || typeof event === "object") { + // If we shouldn't be showing chrome events due to context and this + // is a chrome handler we can ignore it. + const handler = event.handler || event; + if (!this.chromeEnabled && this.isChromeHandler(handler)) { + continue; + } + + if (checkOnly) { + return true; + } + + const eventInfo = { + type, + handler, + tags: "jQuery", + hide: { + capturing: true, + }, + }; + + handlers.push(eventInfo); + } + } + } + } + + if (checkOnly) { + return false; + } + return handlers; + } +} + +/** + * Get or detect jQuery live events. + */ +class JQueryLiveEventCollector extends MainEventCollector { + // eslint-disable-next-line complexity + getListeners(node, { checkOnly } = {}) { + const jQuery = this.getJQuery(node); + const handlers = []; + + if (!jQuery) { + if (checkOnly) { + return false; + } + return handlers; + } + + const data = jQuery._data || jQuery.data; + + if (data) { + // Live events are added to the document and bubble up to all elements. + // Any element matching the specified selector will trigger the live + // event. + const win = this.unwrap(node.ownerGlobal); + let events = null; + + try { + events = data(win.document, "events"); + } catch (e) { + // We have no access to a JS object. This is probably due to a CORS + // violation. Using try / catch is the only way to avoid this error. + } + + if (events) { + for (const [, eventHolder] of Object.entries(events)) { + for (const [idx, event] of Object.entries(eventHolder)) { + if (typeof idx !== "string" || isNaN(parseInt(idx, 10))) { + continue; + } + + let selector = event.selector; + + if (!selector && event.data) { + selector = event.data.selector || event.data || event.selector; + } + + if (!selector || !node.ownerDocument) { + continue; + } + + let matches; + try { + matches = node.matches && node.matches(selector); + } catch (e) { + // Invalid selector, do nothing. + } + + if (!matches) { + continue; + } + + if (typeof event === "function" || typeof event === "object") { + // If we shouldn't be showing chrome events due to context and this + // is a chrome handler we can ignore it. + const handler = event.handler || event; + if (!this.chromeEnabled && this.isChromeHandler(handler)) { + continue; + } + + if (checkOnly) { + return true; + } + const eventInfo = { + type: event.origType || event.type.substr(selector.length + 1), + handler, + tags: "jQuery,Live", + hide: { + capturing: true, + }, + }; + + if (!eventInfo.type && event.data?.live) { + eventInfo.type = event.data.live; + } + + handlers.push(eventInfo); + } + } + } + } + } + + if (checkOnly) { + return false; + } + return handlers; + } + + normalizeListener(handlerDO) { + function isFunctionInProxy(funcDO) { + // If the anonymous function is inside the |proxy| function and the + // function only has guessed atom, the guessed atom should starts with + // "proxy/". + const displayName = funcDO.displayName; + if (displayName && displayName.startsWith("proxy/")) { + return true; + } + + // If the anonymous function is inside the |proxy| function and the + // function gets name at compile time by SetFunctionName, its guessed + // atom doesn't contain "proxy/". In that case, check if the caller is + // "proxy" function, as a fallback. + const calleeDS = funcDO.environment?.calleeScript; + if (!calleeDS) { + return false; + } + const calleeName = calleeDS.displayName; + return calleeName == "proxy"; + } + + function getFirstFunctionVariable(funcDO) { + // The handler function inside the |proxy| function should point the + // unwrapped function via environment variable. + const names = funcDO.environment ? funcDO.environment.names() : []; + for (const varName of names) { + const varDO = handlerDO.environment + ? handlerDO.environment.getVariable(varName) + : null; + if (!varDO) { + continue; + } + if (varDO.class == "Function") { + return varDO; + } + } + return null; + } + + if (!isFunctionInProxy(handlerDO)) { + return handlerDO; + } + + const MAX_NESTED_HANDLER_COUNT = 2; + for (let i = 0; i < MAX_NESTED_HANDLER_COUNT; i++) { + const funcDO = getFirstFunctionVariable(handlerDO); + if (!funcDO) { + return handlerDO; + } + + handlerDO = funcDO; + if (isFunctionInProxy(handlerDO)) { + continue; + } + break; + } + + return handlerDO; + } +} + +/** + * Get or detect React events. + */ +class ReactEventCollector extends MainEventCollector { + getListeners(node, { checkOnly } = {}) { + const handlers = []; + const props = this.getProps(node); + + if (props) { + for (const [name, prop] of Object.entries(props)) { + if (REACT_EVENT_NAMES.includes(name)) { + const listener = prop?.__reactBoundMethod || prop; + + if (typeof listener !== "function") { + continue; + } + + if (!this.chromeEnabled && this.isChromeHandler(listener)) { + continue; + } + + if (checkOnly) { + return true; + } + + const handler = { + type: name, + handler: listener, + tags: "React", + override: { + capturing: name.endsWith("Capture"), + }, + }; + + handlers.push(handler); + } + } + } + + if (checkOnly) { + return false; + } + + return handlers; + } + + getProps(node) { + node = this.unwrap(node); + + for (const key of Object.keys(node)) { + if (key.startsWith("__reactInternalInstance$")) { + const value = node[key]; + if (value.memoizedProps) { + return value.memoizedProps; // React 16 + } + return value?._currentElement?.props; // React 15 + } + } + return null; + } + + normalizeListener(handlerDO, listener) { + let functionText = ""; + + if (handlerDO.boundTargetFunction) { + handlerDO = handlerDO.boundTargetFunction; + } + + const script = handlerDO.script; + // Script might be undefined (eg for methods bound several times, see + // https://bugzilla.mozilla.org/show_bug.cgi?id=1589658) + const introScript = script?.source.introductionScript; + + // If this is a Babel transpiled function we have no access to the + // source location so we need to hide the filename and debugger + // icon. + if (introScript && introScript.displayName.endsWith("/transform.run")) { + listener.hide.debugger = true; + listener.hide.filename = true; + + if (!handlerDO.isArrowFunction) { + functionText += "function ("; + } else { + functionText += "("; + } + + functionText += handlerDO.parameterNames.join(", "); + + functionText += ") {\n"; + + const scriptSource = script.source.text; + functionText += scriptSource.substr( + script.sourceStart, + script.sourceLength + ); + + listener.override.handler = functionText; + } + + return handlerDO; + } +} + +/** + * The exposed class responsible for gathering events. + */ +class EventCollector { + constructor(targetActor) { + this.targetActor = targetActor; + + // The event collector array. Please preserve the order otherwise there will + // be multiple failing tests. + this.eventCollectors = [ + new ReactEventCollector(), + new JQueryLiveEventCollector(), + new JQueryEventCollector(), + new DOMEventCollector(), + ]; + } + + /** + * Destructor (must be called manually). + */ + destroy() { + this.eventCollectors = null; + } + + /** + * Iterate through all event collectors returning on the first found event. + * + * @param {DOMNode} node + * The node to be checked for events. + * @return {Boolean} + * True if the node has event listeners, false otherwise. + */ + hasEventListeners(node) { + for (const collector of this.eventCollectors) { + if (collector.hasListeners(node)) { + return true; + } + } + + return false; + } + + /** + * We allow displaying chrome events if the page is chrome or if + * `devtools.chrome.enabled = true`. + */ + get chromeEnabled() { + if (typeof this._chromeEnabled === "undefined") { + this._chromeEnabled = Services.prefs.getBoolPref( + "devtools.chrome.enabled" + ); + } + + return this._chromeEnabled; + } + + /** + * + * @param {DOMNode} node + * The node for which events are to be gathered. + * @return {Array<Object>} + * An array containing objects in the following format: + * { + * {String} type: The event type, e.g. "click" + * {Function} handler: The function called when event is triggered. + * {Boolean} enabled: Whether the listener is enabled or not (event listeners can + * be disabled via the inspector) + * {String} tags: Comma separated list of tags displayed inside event bubble (e.g. "JQuery") + * {Object} hide: Flags for hiding certain properties. + * {Boolean} capturing + * } + * {Boolean} native + * {String|undefined} sourceActor: The sourceActor id of the event listener + * {nsIEventListenerInfo|undefined} nsIEventListenerInfo + * } + */ + getEventListeners(node) { + const listenerArray = []; + let dbg; + if (!this.chromeEnabled) { + dbg = new Debugger(); + } else { + // When the chrome pref is turned on, we may try to debug system compartments. + // But since bug 1517210, the server is also loaded using the system principal + // and so here, we have to ensure using a special Debugger instance, loaded + // in a compartment flagged with invisibleToDebugger=true. This helps the Debugger + // know about the precise boundary between debuggee and debugger code. + const ChromeDebugger = require("ChromeDebugger"); + dbg = new ChromeDebugger(); + } + + for (const collector of this.eventCollectors) { + const listeners = collector.getListeners(node); + + if (!listeners) { + continue; + } + + for (const listener of listeners) { + const eventObj = this.processHandlerForEvent( + listener, + dbg, + collector.normalizeListener + ); + if (eventObj) { + listenerArray.push(eventObj); + } + } + } + + listenerArray.sort((a, b) => { + return a.type.localeCompare(b.type); + }); + + return listenerArray; + } + + /** + * Process an event listener. + * + * @param {EventListener} listener + * The event listener to process. + * @param {Debugger} dbg + * Debugger instance. + * @param {Function|null} normalizeListener + * An optional function that will be called to retrieve data about the listener. + * It should be a *Collector method. + * + * @return {Array} + * An array of objects where a typical object looks like this: + * { + * type: "click", + * handler: function() { doSomething() }, + * origin: "http://www.mozilla.com", + * tags: tags, + * capturing: true, + * hide: { + * capturing: true + * }, + * native: false, + * enabled: true + * sourceActor: "sourceActor.1234", + * nsIEventListenerInfo: nsIEventListenerInfo {…}, + * } + */ + // eslint-disable-next-line complexity + processHandlerForEvent(listener, dbg, normalizeListener) { + let globalDO; + let eventObj; + + try { + const { capturing, handler } = listener; + + const global = Cu.getGlobalForObject(handler); + + // It is important that we recreate the globalDO for each handler because + // their global object can vary e.g. resource:// URLs on a video control. If + // we don't do this then all chrome listeners simply display "native code." + globalDO = dbg.addDebuggee(global); + let listenerDO = globalDO.makeDebuggeeValue(handler); + + if (normalizeListener) { + listenerDO = normalizeListener(listenerDO, listener); + } + + const hide = listener.hide || {}; + const override = listener.override || {}; + const tags = listener.tags || ""; + const type = listener.type || ""; + const enabled = !!listener.enabled; + let functionSource = handler.toString(); + let line = 0; + let column = null; + let native = false; + let url = ""; + let sourceActor = ""; + + // If the listener is an object with a 'handleEvent' method, use that. + if ( + listenerDO.class === "Object" || + /^XUL\w*Element$/.test(listenerDO.class) + ) { + let desc; + + while (!desc && listenerDO) { + desc = listenerDO.getOwnPropertyDescriptor("handleEvent"); + listenerDO = listenerDO.proto; + } + + if (desc?.value) { + listenerDO = desc.value; + } + } + + // If the listener is bound to a different context then we need to switch + // to the bound function. + if (listenerDO.isBoundFunction) { + listenerDO = listenerDO.boundTargetFunction; + } + + const { isArrowFunction, name, script, parameterNames } = listenerDO; + + if (script) { + const scriptSource = script.source.text; + + // NOTE: Debugger.Script.prototype.startColumn is 1-based. + // Convert to 0-based, while keeping the wasm's column (1) as is. + // (bug 1863878) + const columnBase = script.format === "wasm" ? 0 : 1; + + line = script.startLine; + column = script.startColumn - columnBase; + url = script.url; + const actor = this.targetActor.sourcesManager.getOrCreateSourceActor( + script.source + ); + sourceActor = actor ? actor.actorID : null; + + // Checking for the string "[native code]" is the only way at this point + // to check for native code. Even if this provides a false positive then + // grabbing the source code a second time is harmless. + if ( + functionSource === "[object Object]" || + functionSource === "[object XULElement]" || + functionSource.includes("[native code]") + ) { + functionSource = scriptSource.substr( + script.sourceStart, + script.sourceLength + ); + + // At this point the script looks like this: + // () { ... } + // We prefix this with "function" if it is not a fat arrow function. + if (!isArrowFunction) { + functionSource = "function " + functionSource; + } + } + } else { + // If the listener is a native one (provided by C++ code) then we have no + // access to the script. We use the native flag to prevent showing the + // debugger button because the script is not available. + native = true; + } + + // Arrow function text always contains the parameters. Function + // parameters are often missing e.g. if Array.sort is used as a handler. + // If they are missing we provide the parameters ourselves. + if (parameterNames && parameterNames.length) { + const prefix = "function " + name + "()"; + const paramString = parameterNames.join(", "); + + if (functionSource.startsWith(prefix)) { + functionSource = functionSource.substr(prefix.length); + + functionSource = `function ${name} (${paramString})${functionSource}`; + } + } + + // If the listener is native code we display the filename "[native code]." + // This is the official string and should *not* be translated. + let origin; + if (native) { + origin = "[native code]"; + } else { + origin = + url + + (line ? ":" + line + (column === null ? "" : ":" + column) : ""); + } + + eventObj = { + type: override.type || type, + handler: override.handler || functionSource.trim(), + origin: override.origin || origin, + tags: override.tags || tags, + capturing: + typeof override.capturing !== "undefined" + ? override.capturing + : capturing, + hide: typeof override.hide !== "undefined" ? override.hide : hide, + native, + sourceActor, + nsIEventListenerInfo: listener.nsIEventListenerInfo, + enabled, + }; + + // Hide the debugger icon for DOM0 and native listeners. DOM0 listeners are + // generated dynamically from e.g. an onclick="" attribute so the script + // doesn't actually exist. + if (!sourceActor) { + eventObj.hide.debugger = true; + } + } finally { + // Ensure that we always remove the debuggee. + if (globalDO) { + dbg.removeDebuggee(globalDO); + } + } + + return eventObj; + } +} + +exports.EventCollector = EventCollector; |