mirror of
https://github.com/gorhill/uBlock.git
synced 2024-11-11 17:41:03 +01:00
955 lines
28 KiB
JavaScript
955 lines
28 KiB
JavaScript
/*******************************************************************************
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µBlock - a browser extension to block requests.
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Copyright (C) 2014 Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/
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/* global self, vAPI, CSS */
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/******************************************************************************/
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/******************************************************************************/
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/*! http://mths.be/cssescape v0.2.1 by @mathias | MIT license */
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;(function(root) {
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'use strict';
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if (!root.CSS) {
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root.CSS = {};
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}
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var CSS = root.CSS;
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var InvalidCharacterError = function(message) {
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this.message = message;
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};
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InvalidCharacterError.prototype = new Error();
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InvalidCharacterError.prototype.name = 'InvalidCharacterError';
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if (!CSS.escape) {
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// http://dev.w3.org/csswg/cssom/#serialize-an-identifier
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CSS.escape = function(value) {
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var string = String(value);
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var length = string.length;
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var index = -1;
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var codeUnit;
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var result = '';
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var firstCodeUnit = string.charCodeAt(0);
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while (++index < length) {
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codeUnit = string.charCodeAt(index);
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// Note: there’s no need to special-case astral symbols, surrogate
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// pairs, or lone surrogates.
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// If the character is NULL (U+0000), then throw an
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// `InvalidCharacterError` exception and terminate these steps.
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if (codeUnit === 0x0000) {
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throw new InvalidCharacterError(
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'Invalid character: the input contains U+0000.'
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);
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}
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if (
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// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
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// U+007F, […]
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(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
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// If the character is the first character and is in the range [0-9]
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// (U+0030 to U+0039), […]
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(index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
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// If the character is the second character and is in the range [0-9]
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// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
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(
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index == 1 &&
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codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
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firstCodeUnit == 0x002D
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)
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) {
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// http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point
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result += '\\' + codeUnit.toString(16) + ' ';
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continue;
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}
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// If the character is not handled by one of the above rules and is
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// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
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// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
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// U+005A), or [a-z] (U+0061 to U+007A), […]
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if (
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codeUnit >= 0x0080 ||
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codeUnit == 0x002D ||
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codeUnit == 0x005F ||
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codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
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codeUnit >= 0x0041 && codeUnit <= 0x005A ||
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codeUnit >= 0x0061 && codeUnit <= 0x007A
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) {
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// the character itself
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result += string.charAt(index);
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continue;
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}
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// Otherwise, the escaped character.
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// http://dev.w3.org/csswg/cssom/#escape-a-character
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result += '\\' + string.charAt(index);
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}
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return result;
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};
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}
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}(self));
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/******************************************************************************/
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/******************************************************************************/
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(function() {
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'use strict';
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/******************************************************************************/
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// don't run in frames
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if ( window.top !== window ) {
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return;
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}
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var pickerRoot = document.getElementById(vAPI.sessionId);
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if ( pickerRoot ) {
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return;
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}
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var localMessager = vAPI.messaging.channel('element-picker.js');
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var svgOcean = null;
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var svgIslands = null;
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var svgRoot = null;
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var dialog = null;
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var taCandidate = null;
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var netFilterCandidates = [];
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var cosmeticFilterCandidates = [];
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var targetElements = [];
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var lastNetFilterSession = window.location.host + window.location.pathname;
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var lastNetFilterHostname = '';
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var lastNetFilterUnion = '';
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/******************************************************************************/
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// For browsers not supporting `:scope`, it's not the end of the world: the
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// suggested CSS selectors may just end up being more verbose.
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var cssScope = ':scope > ';
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try {
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document.querySelector(':scope *');
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} catch (e) {
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cssScope = '';
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}
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/******************************************************************************/
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var safeQuerySelectorAll = function(node, selector) {
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if ( node !== null ) {
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try {
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return node.querySelectorAll(selector);
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} catch (e) {
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}
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}
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return [];
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};
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/******************************************************************************/
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var highlightElements = function(elems, force) {
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// To make mouse move handler more efficient
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if ( !force && elems.length === targetElements.length ) {
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if ( elems.length === 0 || elems[0] === targetElements[0] ) {
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return;
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}
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}
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targetElements = elems;
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var ow = pickerRoot.contentWindow.innerWidth;
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var oh = pickerRoot.contentWindow.innerHeight;
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var ocean = [
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'M0 0',
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'h', ow,
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'v', oh,
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'h-', ow,
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'z'
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];
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var islands = [];
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var elem, rect, poly;
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for ( var i = 0; i < elems.length; i++ ) {
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elem = elems[i];
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if ( elem === pickerRoot ) {
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continue;
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}
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if ( typeof elem.getBoundingClientRect !== 'function' ) {
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continue;
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}
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rect = elem.getBoundingClientRect();
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// Ignore if it's not on the screen
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if ( rect.left > ow || rect.top > oh ||
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rect.left + rect.width < 0 || rect.top + rect.height < 0 ) {
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continue;
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}
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poly = 'M' + rect.left + ' ' + rect.top +
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'h' + rect.width +
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'v' + rect.height +
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'h-' + rect.width +
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'z';
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ocean.push(poly);
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islands.push(poly);
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}
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svgOcean.setAttribute('d', ocean.join(''));
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svgIslands.setAttribute('d', islands.join('') || 'M0 0');
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};
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/******************************************************************************/
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var removeElements = function(elems) {
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var i = elems.length, elem;
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while ( i-- ) {
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elem = elems[i];
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if ( elem.parentNode ) {
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elem.parentNode.removeChild(elem);
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}
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}
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};
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/******************************************************************************/
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var netFilterFromUnion = (function() {
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var reTokenizer = /[^0-9a-z%*]+|[0-9a-z%]+|\*/gi;
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var a = document.createElement('a');
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return function(to, out) {
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a.href= to;
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to = a.pathname + a.search;
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var from = lastNetFilterUnion;
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// Reset reference filter when dealing with unrelated URLs
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if ( from === '' && a.host !== lastNetFilterHostname ) {
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lastNetFilterHostname = a.host;
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lastNetFilterUnion = to;
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localMessager.send({
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what: 'elementPickerEprom',
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lastNetFilterSession: lastNetFilterSession,
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lastNetFilterHostname: lastNetFilterHostname,
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lastNetFilterUnion: lastNetFilterUnion
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});
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return;
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}
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// Related URLs
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lastNetFilterHostname = a.host;
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var fromTokens = from.match(reTokenizer);
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var toTokens = to.match(reTokenizer);
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var toCount = toTokens.length, toIndex = 0;
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var fromToken, pos;
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for ( var fromIndex = 0; fromIndex < fromTokens.length; fromIndex += 1 ) {
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fromToken = fromTokens[fromIndex];
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if ( fromToken === '*' ) {
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continue;
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}
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pos = toTokens.indexOf(fromToken, toIndex);
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if ( pos === -1 ) {
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fromTokens[fromIndex] = '*';
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continue;
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}
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if ( pos !== toIndex ) {
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fromTokens.splice(fromIndex, 0, '*');
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fromIndex += 1;
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}
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toIndex = pos + 1;
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if ( toIndex === toCount ) {
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fromTokens = fromTokens.slice(0, fromIndex + 1);
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break;
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}
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}
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from = fromTokens.join('').replace(/\*\*+/g, '*');
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if ( from !== '/*' ) {
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out.push('||' + lastNetFilterHostname + from);
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} else {
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from = to;
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}
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lastNetFilterUnion = from;
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// Remember across element picker sessions
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localMessager.send({
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what: 'elementPickerEprom',
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lastNetFilterSession: lastNetFilterSession,
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lastNetFilterHostname: lastNetFilterHostname,
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lastNetFilterUnion: lastNetFilterUnion
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});
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};
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})();
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/******************************************************************************/
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// Extract the best possible net filter, i.e. as specific as possible.
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var netFilterFromElement = function(elem, out) {
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if ( elem === null ) {
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return;
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}
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if ( elem.nodeType !== 1 ) {
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return;
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}
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var tagName = elem.tagName.toLowerCase();
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if ( netFilterSources.hasOwnProperty(tagName) === false ) {
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return;
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}
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var src = elem[netFilterSources[tagName]];
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if ( src.length === 0 ) {
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return;
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}
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// Remove fragment
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var pos = src.indexOf('#');
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if ( pos !== -1 ) {
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src = src.slice(0, pos);
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}
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var filter = src.replace(/^https?:\/\//, '||');
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// Anchor absolute filter to hostname
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out.push(filter);
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// Suggest a less narrow filter if possible
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pos = filter.indexOf('?');
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if ( pos !== -1 ) {
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out.push(filter.slice(0, pos));
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}
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// Suggest a filter which is a result of combining more than one URL.
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netFilterFromUnion(src, out);
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};
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var netFilterSources = {
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'embed': 'src',
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'iframe': 'src',
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'img': 'src',
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'object': 'data'
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};
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/******************************************************************************/
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// Extract the best possible cosmetic filter, i.e. as specific as possible.
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var cosmeticFilterFromElement = function(elem, out) {
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if ( elem === null ) {
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return;
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}
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if ( elem.nodeType !== 1 ) {
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return;
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}
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var tagName = elem.tagName.toLowerCase();
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var prefix = '';
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var suffix = [];
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var v, i;
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// Id
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v = typeof elem.id === 'string' && CSS.escape(elem.id);
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if ( v ) {
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suffix.push('#', v);
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}
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// Class(es)
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v = typeof elem.className === 'string' && elem.className.trim();
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if ( v.length ) {
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v = v.split(/\s+/);
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i = v.length;
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while ( i-- ) {
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v[i] = CSS.escape(v[i]);
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}
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suffix.push('.', v.join('.'));
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}
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if ( suffix.length === 0 ) {
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prefix = tagName;
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}
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// Attributes (depends on tag name)
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var attributes = [], attr;
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switch ( tagName ) {
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case 'a':
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v = elem.getAttribute('href');
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if ( v ) {
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v = v.replace(/\?.*$/, '');
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if ( v.length ) {
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attributes.push({ k: 'href', v: v });
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}
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}
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break;
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case 'img':
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v = elem.getAttribute('alt');
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if ( v && v.length !== 0 ) {
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attributes.push({ k: 'alt', v: v });
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}
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break;
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default:
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break;
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}
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while ( attr = attributes.pop() ) {
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if ( attr.v.length === 0 ) {
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continue;
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}
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v = elem.getAttribute(attr.k);
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if ( attr.v === v ) {
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suffix.push('[', attr.k, '="', attr.v, '"]');
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} else if ( v.indexOf(attr.v) === 0 ) {
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suffix.push('[', attr.k, '^="', attr.v, '"]');
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} else {
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suffix.push('[', attr.k, '*="', attr.v, '"]');
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}
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}
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var selector = prefix + suffix.join('');
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// https://github.com/gorhill/uBlock/issues/637
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// If the selector is still ambiguous at this point, further narrow using
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// `nth-of-type`. It is preferable to use `nth-of-type` as opposed to
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// `nth-child`, as `nth-of-type` is less volatile.
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var parentNode = elem.parentNode;
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if ( safeQuerySelectorAll(parentNode, cssScope + selector).length > 1 ) {
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i = 1;
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while ( elem.previousSibling !== null ) {
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elem = elem.previousSibling;
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if ( typeof elem.tagName !== 'string' ) {
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continue;
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}
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if ( elem.tagName.toLowerCase() !== tagName ) {
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continue;
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}
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i++;
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}
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selector += ':nth-of-type(' + i + ')';
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}
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out.push('##' + selector);
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};
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/******************************************************************************/
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var filtersFromElement = function(elem) {
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netFilterCandidates.length = 0;
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cosmeticFilterCandidates.length = 0;
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while ( elem && elem !== document.documentElement ) {
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netFilterFromElement(elem, netFilterCandidates);
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cosmeticFilterFromElement(elem, cosmeticFilterCandidates);
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elem = elem.parentNode;
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}
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};
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/******************************************************************************/
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var elementsFromFilter = function(filter) {
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var out = [];
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filter = filter.trim();
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if ( filter === '' ) {
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return out;
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}
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// Cosmetic filters: these are straight CSS selectors
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// TODO: This is still not working well for a[href], because there are
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// many ways to compose a valid href to the same effective URL.
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// One idea is to normalize all a[href] on the page, but for now I will
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// wait and see, as I prefer to refrain from tampering with the page
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// content if I can avoid it.
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if ( filter.lastIndexOf('##', 0) === 0 ) {
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try {
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out = document.querySelectorAll(filter.slice(2));
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}
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catch (e) {
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}
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return out;
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}
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// Net filters: we need to lookup manually -- translating into a
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// foolproof CSS selector is just not possible
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// https://github.com/gorhill/uBlock/issues/945
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// Transform into a regular expression, this allows the user to edit and
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// insert wildcard(s) into the proposed filter
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var reStr = '';
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if ( filter.length > 1 && filter.charAt(0) === '/' && filter.slice(-1) === '/' ) {
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reStr = filter.slice(1, -1);
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}
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else {
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var rePrefix = '', reSuffix = '';
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if ( filter.slice(0, 2) === '||' ) {
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filter = filter.replace('||', '');
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} else {
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if ( filter.charAt(0) === '|' ) {
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rePrefix = '^';
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filter = filter.slice(1);
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}
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}
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if ( filter.slice(-1) === '|' ) {
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reSuffix = '$';
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filter = filter.slice(0, -1);
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}
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reStr = rePrefix +
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filter.replace(/[.+?${}()|[\]\\]/g, '\\$&').replace(/[\*^]+/g, '.*') +
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reSuffix;
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}
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var reFilter = null;
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try {
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reFilter = new RegExp(reStr);
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} catch (e) {
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return out;
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}
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var props = netFilterSources;
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var elems = document.querySelectorAll(Object.keys(props).join());
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var i = elems.length;
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var elem, src;
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while ( i-- ) {
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elem = elems[i];
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src = elem[props[elem.tagName.toLowerCase()]];
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if ( src && reFilter.test(src) ) {
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out.push(elem);
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}
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}
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return out;
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};
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// https://www.youtube.com/watch?v=YI2XuIOW3gM
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/******************************************************************************/
|
||
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var userFilterFromCandidate = function() {
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var v = taCandidate.value;
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var elems = elementsFromFilter(v);
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if ( elems.length === 0 ) {
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return false;
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}
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// Cosmetic filter?
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if ( v.lastIndexOf('##', 0) === 0 ) {
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return window.location.hostname + v;
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}
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// If domain included in filter, no need for domain option
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if ( v.lastIndexOf('||', 0) === 0 ) {
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return v;
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}
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// Assume net filter
|
||
return v + '$domain=' + window.location.hostname;
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var onCandidateChanged = function() {
|
||
var elems = elementsFromFilter(taCandidate.value);
|
||
dialog.querySelector('#create').disabled = elems.length === 0;
|
||
highlightElements(elems);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var candidateFromFilterChoice = function(filterChoice) {
|
||
var slot = filterChoice.slot;
|
||
var filters = filterChoice.filters;
|
||
var filter = filters[slot];
|
||
|
||
if ( filter === undefined ) {
|
||
return '';
|
||
}
|
||
|
||
// For net filters there no such thing as a path
|
||
if ( filterChoice.type === 'net' || filterChoice.modifier ) {
|
||
return filter;
|
||
}
|
||
|
||
// Return path: the target element, then all siblings prepended
|
||
var selector = [];
|
||
for ( ; slot < filters.length; slot++ ) {
|
||
filter = filters[slot];
|
||
selector.unshift(filter.replace(/^##/, ''));
|
||
// Stop at any element with an id: these are unique in a web page
|
||
if ( filter.slice(0, 3) === '###' ) {
|
||
break;
|
||
}
|
||
}
|
||
return '##' + selector.join(' > ');
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var filterChoiceFromEvent = function(ev) {
|
||
var li = ev.target;
|
||
var isNetFilter = li.textContent.slice(0, 2) !== '##';
|
||
var r = {
|
||
type: isNetFilter ? 'net' : 'cosmetic',
|
||
filters: isNetFilter ? netFilterCandidates : cosmeticFilterCandidates,
|
||
slot: 0,
|
||
modifier: ev.ctrlKey || ev.metaKey
|
||
};
|
||
while ( li.previousSibling !== null ) {
|
||
li = li.previousSibling;
|
||
r.slot += 1;
|
||
}
|
||
return r;
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var onDialogClicked = function(ev) {
|
||
if ( ev.target === null ) {
|
||
/* do nothing */
|
||
}
|
||
|
||
else if ( ev.target.id === 'create' ) {
|
||
var filter = userFilterFromCandidate();
|
||
if ( filter ) {
|
||
var d = new Date();
|
||
localMessager.send({
|
||
what: 'createUserFilter',
|
||
filters: '! ' + d.toLocaleString() + ' ' + window.location.href + '\n' + filter,
|
||
});
|
||
removeElements(elementsFromFilter(taCandidate.value));
|
||
stopPicker();
|
||
}
|
||
}
|
||
|
||
else if ( ev.target.id === 'pick' ) {
|
||
unpausePicker();
|
||
}
|
||
|
||
else if ( ev.target.id === 'quit' ) {
|
||
stopPicker();
|
||
}
|
||
|
||
else if ( ev.target.parentNode.classList.contains('changeFilter') ) {
|
||
taCandidate.value = candidateFromFilterChoice(filterChoiceFromEvent(ev));
|
||
onCandidateChanged();
|
||
}
|
||
|
||
ev.stopPropagation();
|
||
ev.preventDefault();
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var removeAllChildren = function(parent) {
|
||
while ( parent.firstChild ) {
|
||
parent.removeChild(parent.firstChild);
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
// TODO: for convenience I could provide a small set of net filters instead
|
||
// of just a single one. Truncating the right-most part of the path etc.
|
||
|
||
var showDialog = function(options) {
|
||
pausePicker();
|
||
|
||
options = options || {};
|
||
|
||
// Create lists of candidate filters
|
||
var populate = function(src, des) {
|
||
var root = dialog.querySelector(des);
|
||
var ul = root.querySelector('ul');
|
||
removeAllChildren(ul);
|
||
var li;
|
||
for ( var i = 0; i < src.length; i++ ) {
|
||
li = document.createElement('li');
|
||
li.textContent = src[i];
|
||
ul.appendChild(li);
|
||
}
|
||
root.style.display = src.length !== 0 ? '' : 'none';
|
||
};
|
||
|
||
populate(netFilterCandidates, '#netFilters');
|
||
populate(cosmeticFilterCandidates, '#cosmeticFilters');
|
||
|
||
dialog.querySelector('ul').style.display = netFilterCandidates.length || cosmeticFilterCandidates.length ? '' : 'none';
|
||
dialog.querySelector('#create').disabled = true;
|
||
|
||
// Auto-select a candidate filter
|
||
var filterChoice = {
|
||
type: '',
|
||
filters: [],
|
||
slot: 0,
|
||
modifier: options.modifier || false
|
||
};
|
||
if ( netFilterCandidates.length ) {
|
||
filterChoice.type = 'net';
|
||
filterChoice.filters = netFilterCandidates;
|
||
} else if ( cosmeticFilterCandidates.length ) {
|
||
filterChoice.type = 'cosmetic';
|
||
filterChoice.filters = cosmeticFilterCandidates;
|
||
}
|
||
|
||
taCandidate.value = '';
|
||
if ( filterChoice.type !== '' ) {
|
||
taCandidate.value = candidateFromFilterChoice(filterChoice);
|
||
onCandidateChanged();
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var elementFromPoint = function(x, y) {
|
||
pickerRoot.style.pointerEvents = 'none';
|
||
var elem = document.elementFromPoint(x, y);
|
||
if ( elem === document.body || elem === document.documentElement ) {
|
||
elem = null;
|
||
}
|
||
pickerRoot.style.pointerEvents = '';
|
||
return elem;
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var onSvgHovered = function(ev) {
|
||
var elem = elementFromPoint(ev.clientX, ev.clientY);
|
||
highlightElements(elem ? [elem] : []);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var onSvgClicked = function(ev) {
|
||
// https://github.com/gorhill/uBlock/issues/810#issuecomment-74600694
|
||
// Unpause picker if user click outside dialog
|
||
if ( dialog.parentNode.classList.contains('paused') ) {
|
||
unpausePicker();
|
||
return;
|
||
}
|
||
|
||
var elem = elementFromPoint(ev.clientX, ev.clientY);
|
||
if ( elem === null ) {
|
||
return;
|
||
}
|
||
filtersFromElement(elem);
|
||
showDialog();
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var svgListening = function(on) {
|
||
var action = (on ? 'add' : 'remove') + 'EventListener';
|
||
svgRoot[action]('mousemove', onSvgHovered);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var onKeyPressed = function(ev) {
|
||
if ( ev.which === 27 ) {
|
||
ev.stopPropagation();
|
||
ev.preventDefault();
|
||
stopPicker();
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
// https://github.com/gorhill/uBlock/issues/190
|
||
// May need to dynamically adjust the height of the overlay + new position
|
||
// of highlighted elements.
|
||
|
||
var onScrolled = function() {
|
||
highlightElements(targetElements, true);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var pausePicker = function() {
|
||
dialog.parentNode.classList.add('paused');
|
||
svgListening(false);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var unpausePicker = function() {
|
||
dialog.parentNode.classList.remove('paused');
|
||
svgListening(true);
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
// Let's have the element picker code flushed from memory when no longer
|
||
// in use: to ensure this, release all local references.
|
||
|
||
var stopPicker = function() {
|
||
targetElements = [];
|
||
|
||
if ( pickerRoot === null ) {
|
||
return;
|
||
}
|
||
|
||
window.removeEventListener('scroll', onScrolled, true);
|
||
pickerRoot.contentWindow.removeEventListener('keydown', onKeyPressed, true);
|
||
taCandidate.removeEventListener('input', onCandidateChanged);
|
||
dialog.removeEventListener('click', onDialogClicked);
|
||
svgListening(false);
|
||
svgRoot.removeEventListener('click', onSvgClicked);
|
||
pickerRoot.parentNode.removeChild(pickerRoot);
|
||
pickerRoot.onload = null;
|
||
pickerRoot =
|
||
dialog =
|
||
svgRoot = svgOcean = svgIslands =
|
||
taCandidate = null;
|
||
localMessager.close();
|
||
|
||
window.focus();
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
var startPicker = function(details) {
|
||
pickerRoot.onload = stopPicker;
|
||
|
||
var frameDoc = pickerRoot.contentDocument;
|
||
var parsedDom = (new DOMParser()).parseFromString(
|
||
details.frameContent,
|
||
'text/html'
|
||
);
|
||
|
||
frameDoc.replaceChild(
|
||
frameDoc.adoptNode(parsedDom.documentElement),
|
||
frameDoc.documentElement
|
||
);
|
||
|
||
frameDoc.body.setAttribute('lang', navigator.language);
|
||
|
||
dialog = frameDoc.body.querySelector('aside');
|
||
dialog.addEventListener('click', onDialogClicked);
|
||
|
||
taCandidate = dialog.querySelector('textarea');
|
||
taCandidate.addEventListener('input', onCandidateChanged);
|
||
|
||
svgRoot = frameDoc.body.querySelector('svg');
|
||
svgOcean = svgRoot.firstChild;
|
||
svgIslands = svgRoot.lastChild;
|
||
svgRoot.addEventListener('click', onSvgClicked);
|
||
svgListening(true);
|
||
|
||
window.addEventListener('scroll', onScrolled, true);
|
||
pickerRoot.contentWindow.addEventListener('keydown', onKeyPressed, true);
|
||
pickerRoot.contentWindow.focus();
|
||
|
||
// Restore net filter union data if it originate from the same URL.
|
||
var eprom = details.eprom || {};
|
||
if ( eprom.lastNetFilterSession === lastNetFilterSession ) {
|
||
lastNetFilterHostname = eprom.lastNetFilterHostname || '';
|
||
lastNetFilterUnion = eprom.lastNetFilterUnion || '';
|
||
}
|
||
|
||
// Auto-select a specific target, if any, and if possible
|
||
|
||
highlightElements([], true);
|
||
|
||
var elem;
|
||
|
||
// Try using mouse position
|
||
if ( details.clientX !== -1 ) {
|
||
elem = elementFromPoint(details.clientX, details.clientY);
|
||
if ( elem !== null ) {
|
||
filtersFromElement(elem);
|
||
showDialog();
|
||
return;
|
||
}
|
||
}
|
||
|
||
// No mouse position available, use suggested target
|
||
var target = details.target || '';
|
||
var pos = target.indexOf('\t');
|
||
if ( pos === -1 ) {
|
||
return;
|
||
}
|
||
var srcAttrMap = {
|
||
'a': 'href',
|
||
'img': 'src',
|
||
'iframe': 'src',
|
||
'embed': 'src',
|
||
'video': 'src',
|
||
'audio': 'src'
|
||
};
|
||
var tagName = target.slice(0, pos);
|
||
var url = target.slice(pos + 1);
|
||
var attr = srcAttrMap[tagName];
|
||
if ( attr === undefined ) {
|
||
return;
|
||
}
|
||
var elems = document.querySelectorAll(tagName + '[' + attr + ']');
|
||
var i = elems.length;
|
||
var src;
|
||
while ( i-- ) {
|
||
elem = elems[i];
|
||
src = elem[attr];
|
||
if ( typeof src !== 'string' || src === '' ) {
|
||
continue;
|
||
}
|
||
if ( src !== url ) {
|
||
continue;
|
||
}
|
||
filtersFromElement(elem);
|
||
showDialog({ modifier: true });
|
||
return;
|
||
}
|
||
};
|
||
|
||
/******************************************************************************/
|
||
|
||
pickerRoot = document.createElement('iframe');
|
||
pickerRoot.id = vAPI.sessionId;
|
||
pickerRoot.style.cssText = [
|
||
'display: block',
|
||
'visibility: visible',
|
||
'opacity: 1',
|
||
'position: fixed',
|
||
'top: 0',
|
||
'left: 0',
|
||
'width: 100%',
|
||
'height: 100%',
|
||
'background: transparent',
|
||
'margin: 0',
|
||
'padding: 0',
|
||
'border: 0',
|
||
'border-radius: 0',
|
||
'box-shadow: none',
|
||
'outline: 0',
|
||
'z-index: 2147483647',
|
||
''
|
||
].join('!important; ');
|
||
|
||
pickerRoot.onload = function() {
|
||
localMessager.send({ what: 'elementPickerArguments' }, startPicker);
|
||
};
|
||
|
||
document.documentElement.appendChild(pickerRoot);
|
||
|
||
/******************************************************************************/
|
||
|
||
// https://www.youtube.com/watch?v=sociXdKnyr8
|
||
|
||
/******************************************************************************/
|
||
|
||
})();
|