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Editor: throttle scrolling of the main window when the editor is active and is being scrolled with the mouse wheel or a trackpad, see #27013

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git-svn-id: https://develop.svn.wordpress.org/trunk@27368 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Andrew Ozz
2014-03-03 02:33:22 +00:00
parent 1a91bee772
commit 957beec4de
3 changed files with 63 additions and 8 deletions
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32
src/wp-admin/js/post.js
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@@ -370,7 +370,8 @@ $(document).on( 'heartbeat-send.refresh-lock', function( e, data ) {
}(jQuery));
jQuery(document).ready( function($) {
var stamp, visibility, $submitButtons, updateVisibility, updateText, $content,
var stamp, visibility, $submitButtons, updateVisibility, updateText, $content, topx, reset,
deltax = 0,
sticky = '',
last = 0,
co = $('#content'),
@@ -1067,12 +1068,18 @@ jQuery(document).ready( function($) {
if ( ! ( 'ontouchstart' in window ) ) {
// When scrolling with mouse wheel or trackpad inside the Text editor, don't scroll the whole window
$content = $('#content').on( 'onwheel' in $document[0] ? 'wheel.text-editor-scroll' : 'mousewheel.text-editor-scroll', function( event ) {
var delta, origEvent = event.originalEvent;
var delta, top,
origEvent = event.originalEvent;
if ( wp.editor && wp.editor.fullscreen.settings.visible ) {
return;
}
// Don't modify scrolling when the Text editor is not active.
if ( document.activeElement && document.activeElement.id !== 'content' ) {
return;
}
if ( typeof origEvent.deltaY !== 'undefined' ) {
delta = origEvent.deltaY;
@@ -1084,6 +1091,27 @@ jQuery(document).ready( function($) {
}
$content.scrollTop( $content.scrollTop() + delta );
top = $content.scrollTop();
if ( topx === top ) {
deltax += delta;
window.clearTimeout( reset );
reset = window.setTimeout( function() {
deltax = 0;
}, 1000 );
} else {
deltax = 0;
}
topx = top;
// Sensitivity: scroll the parent window when over-scrolling by more than 800px
if ( deltax > 1000 || deltax < -1000 ) {
return;
}
event.preventDefault();
});
}