Dev : Extensions : Example Code: Difference between revisions
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==Other== | ==Other== | ||
*[[Dev : Extensions : Example Code : Apply button]] | *[[Dev : Extensions : Example Code : Apply button | Adding an Apply button to dialogs]] | ||
*[[Dev : Extensions : Example Code : Adding items to menus]] | *[[Dev : Extensions : Example Code : Adding items to menus | Adding items to menus with overlays]] | ||
*[[Dev : Extensions : Example Code : File IO]] | *[[Dev : Extensions : Example Code : File IO | File IO]] | ||
*[[Dev : | *[[Dev : Extensions : Example Code : Printing to JSConsole | Printing debug information to JavaScript Console]] | ||
*[[Dev : | *[[Dev : Extensions : Example Code : Inserting text at cursor | Inserting text at cursor]] | ||
Revision as of 13:00, 4 October 2004
Preferences
XulPlanet has an article on preferences
Progress Listeners
Progress Listeners alllow extensions to be notified of events assosiated with documents loading in the browser and with tab switching events. Progress Listeners implement the nsIWebProgressListener interface.
- Create an object which implements nsIWebProgressListener:
const STATE_START = Components.interfaces.nsIWebProgressListener.STATE_START;
const STATE_STOP = Components.interfaces.nsIWebProgressListener.STATE_STOP;
var myListener =
{
QueryInterface : function(aIID)
{
if (aIID.equals(Components.interfaces.nsIWebProgressListener) ||
aIID.equals(Components.interfaces.nsISupportsWeakReference) ||
aIID.equals(Components.interfaces.nsISupports))
return this;
throw Components.results.NS_NOINTERFACE;
},
onStateChange:function(aProgress,aRequest,aFlag,aStatus)
{
if(aFlag & STATE_START)
{
//This fires when the load event is initiated
}
if(aFlag & STATE_STOP)
{
//This fires when the load finishes
}
return 0;
},
onLocationChange:function(aProgress webProgress , aRequest, aURI)
{
//This fires when the location bar changes i.e load event is confirmed or when the user switches tabs
//return 0;
},
//For defnitiions of the remaining functions see XulPlanet
onProgressChange:function(a,b,c,d,e,f){},
onStatusChange:function(a,b,c,d){},
onSecurityChange:function(a,b,c){},
onLinkIconAvailable:function(a){}
}
- Attach the progressListener to a <browser> object, e.g. for firefox:
const NOTIFY_STATE_DOCUMENT = Components.interfaces.nsIWebProgress.NOTIFY_STATE_DOCUMENT; window.getBrowser().addProgressListener(myListener , NOTIFY_STATE_DOCUMENT);
The second argument is a status filter which determines the type of events that will be recieved.
