mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/RevisionSlider
synced 2024-11-16 12:00:12 +00:00
4ac1ff57f1
These are not needed any more, because the code runs in a seperate scope anyway. Change-Id: I939a06102f194a0c98021accb2f62be73dd0562f
119 lines
3.1 KiB
JavaScript
119 lines
3.1 KiB
JavaScript
mw.libs.revisionSlider = mw.libs.revisionSlider || {};
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// originally taken from https://stackoverflow.com/questions/1517924/javascript-mapping-touch-events-to-mouse-events
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mw.libs.revisionSlider.touchEventConverter = function ( event ) {
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var first = event.changedTouches[ 0 ],
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type, simulatedEvent;
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event.preventDefault();
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switch ( event.type ) {
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case 'touchstart':
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type = 'mousedown';
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break;
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case 'touchmove':
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type = 'mousemove';
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break;
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case 'touchend':
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type = 'mouseup';
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break;
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default:
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return;
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}
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if ( typeof MouseEvent !== 'undefined' ) {
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simulatedEvent = new MouseEvent( type, {
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bubbles: true,
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cancelable: true,
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view: window,
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detail: 1,
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screenX: first.screenX,
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screenY: first.screenY,
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clientX: first.clientX,
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clientY: first.clientY,
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button: 0,
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relatedTarget: null
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} );
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} else {
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simulatedEvent = document.createEvent( 'MouseEvent' );
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simulatedEvent.initMouseEvent(
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type, true, true, window, 1,
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first.screenX, first.screenY,
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first.clientX, first.clientY,
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false, false, false, false,
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0, null
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);
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}
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first.target.dispatchEvent( simulatedEvent );
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};
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// fixes issues with zoomed Chrome on touch see https://github.com/jquery/jquery/issues/3187
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mw.libs.revisionSlider.correctElementOffsets = function ( offset ) {
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var prevStyle, docWidth, docRect,
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isChrome = /chrom(e|ium)/.test( navigator.userAgent.toLowerCase() );
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// since this problem only seems to appear with Chrome just use this in Chrome
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if ( !isChrome ) {
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return offset;
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}
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// get document element width without scrollbar
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prevStyle = document.body.style.overflow || '';
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document.body.style.overflow = 'hidden';
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docWidth = document.documentElement.clientWidth;
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document.body.style.overflow = prevStyle;
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// determine if the viewport has been scaled
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if ( docWidth / window.innerWidth !== 1 ) {
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docRect = document.documentElement.getBoundingClientRect();
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offset = {
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top: offset.top - window.pageYOffset - docRect.top,
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left: offset.left - window.pageXOffset - docRect.left
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};
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}
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return offset;
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};
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/**
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* Based on jQuery RTL Scroll Type Detector plugin by othree: https://github.com/othree/jquery.rtl-scroll-type
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*
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* @return {string} - 'default', 'negative' or 'reverse'
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*/
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mw.libs.revisionSlider.determineRtlScrollType = function () {
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var isChrome = /chrom(e|ium)/.test( navigator.userAgent.toLowerCase() ),
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$dummy;
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// in Chrome V8 5.8.283 and 5.9.211 the detection below gives wrong results leading to strange behavior
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// Chrome V8 6.0 seems to fix that issue so this workaround can be removed then
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if ( isChrome ) {
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return 'default';
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}
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$dummy = $( '<div>' )
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.css( {
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dir: 'rtl',
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width: '4px',
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height: '1px',
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position: 'absolute',
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top: '-1000px',
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overflow: 'scroll'
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} )
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.text( 'ABCD' )
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.appendTo( 'body' )[ 0 ];
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if ( $dummy.scrollLeft > 0 ) {
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return 'default';
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} else {
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$dummy.scrollLeft = 1;
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if ( $dummy.scrollLeft === 0 ) {
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return 'negative';
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}
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}
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return 'reverse';
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};
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mw.libs.revisionSlider.calculateRevisionsPerWindow = function ( margin, revisionWidth ) {
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return Math.floor( ( $( '#mw-content-text' ).width() - margin ) / revisionWidth );
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};
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