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/*
* Edit warning for Vector
*/
( function ( mw, $ ) {
$(document).ready( function () {
// Check if EditWarning is enabled and if we need it
if ( $( '#wpTextbox1' ).length === 0 ) {
return true;
}
// Get the original values of some form elements
$( '#wpTextbox1, #wpSummary' ).each( function () {
$(this).data( 'origtext', $(this).val() );
});
// Attach our own handler for onbeforeunload which respects the current one
var otherOnBeforeUnload = window.onbeforeunload;
function ourOnBeforeUnload() {
var fallbackResult, retval;
// Check if someone already set an onbeforeunload hook
if ( otherOnBeforeUnload ) {
// Get the result of their onbeforeunload hook
fallbackResult = otherOnBeforeUnload();
}
// Check if their onbeforeunload hook returned something
if ( fallbackResult !== undefined ) {
// Exit here, returning their message
retval = fallbackResult;
} else {
// Check if the current values of some form elements are the same as
// the original values
if (
mw.config.get( 'wgAction' ) == 'submit' ||
$( '#wpTextbox1' ).data( 'origtext' ) != $( '#wpTextbox1' ).val() ||
$( '#wpSummary' ).data( 'origtext' ) != $( '#wpSummary' ).val()
) {
// Return our message
retval = mw.msg( 'vector-editwarning-warning' );
}
}
// Unset the onbeforeunload handler so we don't break page caching in Firefox
window.onbeforeunload = null;
if ( retval !== undefined ) {
// ...but if the user chooses not to leave the page, we need to rebind it
setTimeout( function () {
window.onbeforeunload = ourOnBeforeUnload;
}, 1 );
return retval;
}
}
// Do the first binding now
window.onbeforeunload = ourOnBeforeUnload;
function pageShowHandler() {
// Re-add onbeforeunload handler on pageshow.
window.onbeforeunload = ourOnBeforeUnload;
}
$( window ).on( 'pageshow', pageShowHandler );
// Add form submission handler
$( '#editform' ).submit( function () {
// Restore whatever previous onbeforeload hook existed
window.onbeforeunload = otherOnBeforeUnload;
});
});
}( mediaWiki, jQuery ) );