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文档高亮
// ==UserScript==
// @name 关键字高亮
// @namespace highlight
// @version 0.2
// @description 文档高亮
// @author myxw94
// @include *
// @grant none
// @require http://cdn.bootcss.com/jquery/1.8.3/jquery.min.js
// ==/UserScript==
(function() {
/*
highlight v5
Highlights arbitrary terms.
<http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html>
MIT license.
Johann Burkard
<http://johannburkard.de>
<mailto:[email protected]>
*/
jQuery.fn.highlight = function(pat) {
function innerHighlight(node, pat) {
var skip = 0;
if (node.nodeType == 3) {
var pos = node.data.toUpperCase().indexOf(pat);
pos -= (node.data.substr(0, pos).toUpperCase().length - node.data.substr(0, pos).length);
if (pos >= 0) {
var spannode = document.createElement('span');
spannode.className = 'highlight';
var middlebit = node.splitText(pos);
var endbit = middlebit.splitText(pat.length);
var middleclone = middlebit.cloneNode(true);
spannode.appendChild(middleclone);
middlebit.parentNode.replaceChild(spannode, middlebit);
skip = 1;
}
}
else if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
for (var i = 0; i < node.childNodes.length; ++i) {
i += innerHighlight(node.childNodes[i], pat);
}
}
return skip;
}
return this.length && pat && pat.length ? this.each(function() {
innerHighlight(this, pat.toUpperCase());
}) : this;
};
jQuery.fn.removeHighlight = function() {
return this.find("span.highlight").each(function() {
this.parentNode.firstChild.nodeName;
with (this.parentNode) {
replaceChild(this.firstChild, this);
normalize();
}
}).end();
};
function getSelectText() {
return window.getSelection ? window.getSelection().toString() :
document.selection.createRange().text;
}
document.onkeydown = function(event) {
var e = event || window.event || arguments.callee.caller.arguments[0];
if (e && e.keyCode == 67) { // 按c
// document.execCommand("Copy")//执行复制
// $('body').highlight(getSelectText());
$('body').removeHighlight().highlight(getSelectText());
$(".highlight").css("background-color","yellow")//先设置高颜色
}
if (e && e.keyCode == 72) { // 按H的打开帮助
alert("说明 \n C 选中后关键词并高亮关键词 \n X 取消高亮\n H 打开帮助 \n 注意:输入文字时请调整汉字输入模式,否则会触发功能!");
}
};
})();