Bug 30995 – TimelineAgent should not add events to the timeline if there are no event listeners.

• Component: Web Inspector (Deprecated)
• Status: RESOLVED FIXED

[Kelly Norton]

TimelineAgent currently sends all DOM event dispatches even if there are no event listeners wired to the Node or its ancestors.
(attaching patch)

[Kelly Norton]

Created attachment 42278 [details]
A proposed solution for this.

[Timothy Hatcher]

Comment on attachment 42278 [details]
A proposed solution for this.

> +// static

We normally don't add comments like this.


> +inline InspectorTimelineAgent* InspectorTimelineAgent::retrieveIfEventHasListeners(InspectorTimelineAgent* timelineAgent,
> +    const AtomicString& eventType, Node* node, const Vector< RefPtr< ContainerNode > >& ancestors)

Will this be used by other callers later? If not it might be best just to put this in Node.cpp so there are less headers included by InspectorTimelineAgent.h.
I can see a variation of this being used by XHRs (we don't want to show readystate or load records if there are no listeners.)


> +    for (size_t i = ancestors.size(); i; --i) {
> +        ContainerNode* ancestor = ancestors[i - 1].get();
> +        if (ancestor->hasEventListeners(eventType))
> +            return timelineAgent;
> +    }

This is better written as:

    for (ssize_t i = (ancestors.size() - 1); i >= 0; --i) {
        ContainerNode* ancestor = ancestors[i].get();
        if (ancestor->hasEventListeners(eventType))
            return timelineAgent;
    }

[Kelly Norton]

Created attachment 42287 [details]
Updated w/ review feedback and went ahead and added the same thing to XHRs.

[Kelly Norton]

Created attachment 42288 [details]
Fixes ChangeLog

[WebKit Commit Bot]

Comment on attachment 42288 [details]
Fixes ChangeLog

Clearing flags on attachment: 42288

Committed r50400: <http://trac.webkit.org/changeset/50400>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.