Some basics I understood about JS execution in WebKit. JavaScript execution inside a browser is event driven. Event may be fired from multiple source like Mouse, Keyboard,Timer(window.setInterval,window.setTimeout), XHR, DOM... Also WebKit executes javascript in a mainthread(in case of worker context it will be executed from respective worker thread) and script is not yieldable at any point. Control will reach to mainloop only after executing the complete flow(Suppose script execution starts from a()->b()->c()->d(), you can't yield the execution at any intermediate point).
Please find my reply below, On 23 February 2013 18:26, Vicky Tux <[email protected]> wrote: > > 1. Is there any possibility to identify whether any script executing > currently or not? > [ARUN] Not possible. If script is being executing then mainthread will be blocked. You can add your own traps to ScriptController::evaluateInWorld(Refer InspectorInstrumentation::willEvaluateScript & InspectorInstrumentation::didEvaluateScript). But you should check the status from another thread to know the browser mainthread is executing script or not. But what will you do with that status?, beware you can't yield/disable it from another thread. 2. Is webkit supporting to pause and resume script execution? > [ARUN] WebKit supports only disabling the script execution via Settings. You may wonder like how "WebInspector"'s "pause script execution" works!!!. It is completely different story :(. 3. Will disabling execution through simply setting > setJavaScriptEnabled(false) and enabling by reverting it causes any > misbehavior in script execution? > [ARUN] That is depends on the page being executing. Incase page has timing dependent execution flow(timers) then it may misbehave. > > Thanks, > Ameen. > > _______________________________________________ > webkit-dev mailing list > [email protected] > https://lists.webkit.org/mailman/listinfo/webkit-dev > > (If it has any faults, please correct me:) ) -- *Arunprasad Rajkumar* http://in.linkedin.com/in/ararunprasad
_______________________________________________ webkit-dev mailing list [email protected] https://lists.webkit.org/mailman/listinfo/webkit-dev
