Mirrors/uBlock
1
0
Fork 0
mirror of https://github.com/gorhill/uBlock.git synced 2024-11-01 16:33:06 +01:00
Code Issues Releases Wiki Activity

this fixes #637

Browse Source
This commit is contained in:
gorhill 2015-01-30 00:49:30 -05:00
parent 77979c0334
commit 9467e7fdec
1 changed files with 43 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
src/js/element-picker.js
View File

@ -19,8 +19,7 @@
Home: https://github.com/gorhill/uBlock
*/
/* global CSS */
'use strict';
/* global self, vAPI, CSS */
/******************************************************************************/
/******************************************************************************/
@ -28,6 +27,8 @@
/*! http://mths.be/cssescape v0.2.1 by @mathias | MIT license */
;(function(root) {
'use strict';
if (!root.CSS) {
root.CSS = {};
}
@ -118,6 +119,8 @@
(function() {
'use strict';
/******************************************************************************/
// don't run in frames
@ -158,6 +161,19 @@ var onSvgHoveredTimer = null;
/******************************************************************************/
// For browsers not supporting `:scope`, it's not the end of the world: the
// suggested CSS selectors may just end up being more verbose.
var cssScope = ':scope > ';
try {
document.querySelector(':scope *');
} catch (e) {
cssScope = '';
}
/******************************************************************************/
var pickerPaused = function() {
return pickerRoot.classList.contains('paused');
};
@ -295,7 +311,7 @@ var cosmeticFilterFromElement = function(elem, out) {
var tagName = elem.tagName.toLowerCase();
var prefix = '';
var suffix = [];
var v;
var v, i;
// Id
v = typeof elem.id === 'string' && CSS.escape(elem.id);
@ -307,7 +323,7 @@ var cosmeticFilterFromElement = function(elem, out) {
v = typeof elem.className === 'string' && elem.className.trim();
if ( v.length ) {
v = v.split(/\s+/);
var i = v.length;
i = v.length;
while ( i-- ) {
v[i] = CSS.escape(v[i]);
}
@ -353,7 +369,29 @@ var cosmeticFilterFromElement = function(elem, out) {
}
}
out.push('##' + prefix + suffix.join(''));
var selector = prefix + suffix.join('');
// https://github.com/gorhill/uBlock/issues/637
// If the selector is still ambiguous at this point, further narrow using
// `nth-of-type`. It is preferable to use `nth-of-type` as opposed to
// `nth-child`, as `nth-of-type` is less volatile.
var parentNode = elem.parentNode;
if ( parentNode !== null && parentNode.querySelectorAll(cssScope + selector).length > 1 ) {
i = 1;
while ( elem.previousSibling !== null ) {
elem = elem.previousSibling;
if ( typeof elem.tagName !== 'string' ) {
continue;
}
if ( elem.tagName.toLowerCase() !== tagName ) {
continue;
}
i++;
}
selector += ':nth-of-type(' + i + ')';
}
out.push('##' + selector);
};
/******************************************************************************/