我有一个选择对象,在IE中,我运行
range = selection.createRange();
然后我尝试获取startContainer,但我无法弄清楚如何。所有示例都显示我设置了startContainer,但我的目的是突出显示文本。如何在不先获取它的情况下知道将其设置为哪个元素?
我知道在FireFox中它就像
一样简单range = selection.getRangeAt(0);
firstNode = range.startContainer;
答案 0 :(得分:2)
[已经两年了。] 好的,这将是丑陋的,但我想我得到了这个问题的答案(似乎在IE8上工作)。代码如下(解释在注释中):
/**
* @param {window object} win The window from which the selection is to be retrieved. This could also be an iframe.contentWindow.
*/
function getRangeObject(win) { //Gets the first range object.
win=win || window;
if (win.getSelection) { // W3C/FF/Chrome/Safari/Opera/IE9
return win.getSelection().getRangeAt(0); //W3C DOM Range Object
}
else if(win.document.selection) { // IE8
return win.document.selection.createRange(); //Microsoft TextRange Object
}
return null;
}
function getStartContainer(win) {
win=win || window;
var range=getRangeObject(win);
if(range) {
if(range.startContainer) { // W3C/FF/Chrome/Safari/Opera/IE9
return range.startContainer;
} else if(document.selection) { //IE8
var rangeCopy=range.duplicate(); //Create a copy
var rangeObj=range.duplicate();
rangeCopy.collapse(true); //Go to beginning of the selection
rangeCopy.moveEnd('character',1); //Select only the first character
//Debug Message
//alert(rangeCopy.text); //Should be the first character of the selection
var parentElement=rangeCopy.parentElement();
rangeObj.moveToElementText(parentElement); //Select all text of parentElement
rangeObj.setEndPoint('EndToEnd',rangeCopy); //Set end point to the first character of the 'real' selection
var text=rangeObj.text; //Now we get all text from parentElement's first character upto the real selection's first character
//Iterate through all the child text nodes and check for matches
//As we go through each text node keep removing the text value (substring) from the beginning of the text variable.
var container=null;
for(var node=parentElement.firstChild; node; node=node.nextSibling) {
if(node.nodeType==3) {//Text node
var find=node.nodeValue;
var pos=text.indexOf(find);
if(pos==0 && text!=find) { //text==find is a special case
text=text.substring(find.length);
} else {
container=node;
break;
}
}
}
range.startContainer=container; //Finally we are here
//Debug Message
//alert(container.nodeValue);
}
}
}
对于过多的评论感到抱歉(我认为这是必要的)。一旦你删除所有这些评论,你就会得到代码......不那么难看:P。
答案 1 :(得分:0)
我刚遇到这个问题。我找不到一个优雅的解决方案,所以这里是一个不优雅的解决方案:
注意:只有起始容器具有id
时才会起作用首先检查浏览器是否为IE。然后,
// var range should be your TextRange object
var matches = range.htmlText.match(/<[^>]* id=([^\s]+)[^>]*>/);
if (matches) {
var startContainer = document.getElementById(matches[1]);
if (startContainer) {
...
}
}
以下是范围的方法:http://msdn.microsoft.com/en-us/library/ms535872(v=vs.85).aspx
我认为没有办法获得一套实际的dom objs。
答案 2 :(得分:-1)
我也在做类似的事情。我还没有进入IE部分,但我会建议迭代范围的属性列表,看看你有什么可用
var msg = '';
for (var i in range) {
msg += i + ': ' + range[i] + '\n';
}
alert(msg);