mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/RevisionSlider
synced 2024-11-15 03:33:45 +00:00
31b9fe31ef
This will make the pointers work on touch devices. The events responsible for the touch drag and move are converted to mouse actions that will trigger the draggable. When using Chrome on touch devices and zooming the offset of elements calculated by jQuery is wrong. There is a workaround that seems to work and also seems to not break behavior with normal browsers and on other devices. Since this only seems to be a problem in Chrome the fix will only applied to Chrome browsers to avoid performance los on others. Also introduced a script file for static utility methods. Bug: T164249 Change-Id: I245f77eb836afded249f3b5ebb7129dab08d0017
84 lines
2.3 KiB
JavaScript
84 lines
2.3 KiB
JavaScript
( function ( mw, $ ) {
|
|
mw.libs.revisionSlider = mw.libs.revisionSlider || {};
|
|
|
|
// originally taken from https://stackoverflow.com/questions/1517924/javascript-mapping-touch-events-to-mouse-events
|
|
mw.libs.revisionSlider.touchEventConverter = function ( event ) {
|
|
var first = event.changedTouches[ 0 ],
|
|
type, simulatedEvent;
|
|
|
|
event.preventDefault();
|
|
|
|
switch ( event.type ) {
|
|
case 'touchstart':
|
|
type = 'mousedown';
|
|
break;
|
|
case 'touchmove':
|
|
type = 'mousemove';
|
|
break;
|
|
case 'touchend':
|
|
type = 'mouseup';
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
|
|
if ( typeof MouseEvent !== 'undefined' ) {
|
|
simulatedEvent = new MouseEvent( type, {
|
|
bubbles: true,
|
|
cancelable: true,
|
|
view: window,
|
|
detail: 1,
|
|
screenX: first.screenX,
|
|
screenY: first.screenY,
|
|
clientX: first.clientX,
|
|
clientY: first.clientY,
|
|
button: 0,
|
|
relatedTarget: null
|
|
} );
|
|
} else {
|
|
simulatedEvent = document.createEvent( 'MouseEvent' );
|
|
simulatedEvent.initMouseEvent(
|
|
type, true, true, window, 1,
|
|
first.screenX, first.screenY,
|
|
first.clientX, first.clientY,
|
|
false, false, false, false,
|
|
0, null
|
|
);
|
|
}
|
|
|
|
first.target.dispatchEvent( simulatedEvent );
|
|
};
|
|
|
|
// fixes issues with zoomed Chrome on touch see https://github.com/jquery/jquery/issues/3187
|
|
mw.libs.revisionSlider.correctElementOffsets = function ( offset ) {
|
|
var prevStyle, docWidth, docRect,
|
|
isChrome = /chrom(e|ium)/.test( navigator.userAgent.toLowerCase() );
|
|
|
|
// since this problem only seems to appear with Chrome just use this in Chrome
|
|
if ( !isChrome ) {
|
|
return offset;
|
|
}
|
|
|
|
// get document element width without scrollbar
|
|
prevStyle = document.body.style.overflow || '';
|
|
document.body.style.overflow = 'hidden';
|
|
docWidth = document.documentElement.clientWidth;
|
|
document.body.style.overflow = prevStyle;
|
|
|
|
// determine if the viewport has been scaled
|
|
if ( docWidth / window.innerWidth !== 1 ) {
|
|
docRect = document.documentElement.getBoundingClientRect();
|
|
offset = {
|
|
top: offset.top - window.pageYOffset - docRect.top,
|
|
left: offset.left - window.pageXOffset - docRect.left
|
|
};
|
|
}
|
|
|
|
return offset;
|
|
};
|
|
|
|
mw.libs.revisionSlider.calculateRevisionsPerWindow = function ( margin, revisionWidth ) {
|
|
return Math.floor( ( $( '#mw-content-text' ).width() - margin ) / revisionWidth );
|
|
};
|
|
}( mediaWiki, jQuery ) );
|