我正在寻找解决方案如何使用window.getSelection
和document.selection
从所选文字中提取网址。
要选择的文字看起来:
<p>Lorem Ipsum is <a href="http://example.com">simply <b>dummy</b> text</a> of the printing and typesetting industry.</p>
所选文本(由用户选择)以提取链接:
选项1(在标签之间包含文字和文字):
Ipsum is simply dummy text of
选项2(选择文本和链接片段):
Ipsum is simply
该函数应该返回http://example.com
答案 0 :(得分:2)
很难写出跨浏览器功能。请参阅How to bind a handler to a selection change on window?。
我们应该捕获一些事件,例如mousedown
,mouseup
,touchstart
,touchend
。这些事件的组合可能没问题。
function addEvent(elem, event, func) {
if (elem.addEventListener) {
elem.addEventListener(event, func, false);
} else {
elem.attachEvent('on' + event, func);
}
}
接下来是getSelectedHTML()
使用window.getSelection
或document.selection
。
function getSelectedHTML(event) {
// http://www.w3.org/TR/2000/REC-DOM-Level-2-Traversal-Range-20001113/ranges.html
var range = window.getSelection ? window.getSelection() /* W3C */
: document.getSelection ? document.getSelection() /* redundant? */
: document.selection ? document.selection.createRange() /* IE */
: null;
if (range) {
if (range.getRangeAt) {
range = range.getRangeAt(0);
} else if (range.setStart) { // Safari 1.3
// Create range by itself
range.setStart(range.anchorNode, range.anchorOffset);
range.setEnd(range.focusNode, range.focusOffset);
} else {
// IE is already reange
}
var html = null, link = null;
if (range.cloneContents) {
var dummy = document.createElement('div');
dummy.appendChild(range.cloneContents());
html = dummy.innerHTML;
} else {
html = range.htmlText; /* IE */
}
if (html) {
link = html.match(/<a.*?href\s*?=['"](.*?)['"]/);
return link ? link[1] : null;
}
}
return null;
}
应特别使用旧浏览器检查此代码。
答案 1 :(得分:0)
如果我误解了这个问题,我很抱歉,但这是我的建议。
拥有一个函数并将选中的HTML传递给它,让它像这样处理它。
function FindLink(str){
// str='<p>Lorem Ipsum is <a href="http://example.com">simply <b>dummy</b> text</a> of the printing and typesetting industry.</p>';
// we get the index of the beginning of the <a> tag
var n = str.indexOf("<a") ;
// we find the href property of the <a> element, starting from the <a we found
var n2 = str.indexOf("href=\"", n) + 6;
// we find the end of the href property
n3 = str.indexOf("\">",n2);
// we find the substring starting at the beginning of the link and going for however many characters the link is
link = str.substr(n2,n3-n2);
return link;
}
我希望有所帮助!