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javascript – JS：获取contentEditable div中所有选定节点的数组

2019-09-18 09:34:42 作者：互联网

嗨,我一直在使用contentEditable一段时间了,我觉得我对它有很好的处理.回避我的一件事是如何获得部分或完全在用户选择范围内的所有节点的引用数组.有人有个主意吗？

这是从一开始：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
function getSelectedNodes(){
    var sel = window.getSelection();
    try{var frag=sel.getRangeAt(0).cloneContents()}catch(e){return(false);}
    var tempspan = document.createElement("span");
    tempspan.appendChild(frag);

    var selnodes = Array() //<<- how do I fill this array??
    var output = ''
    for(i in selnodes){
        output += "A "+selnodes[i].tagName+" was found\n"
        //do something cool with each element here...
    }
    return(output)
}
</script>
</head>

<body contentEditable="true" onkeypress="return(keypress(event))">
<div>This <strong>div</strong> is <em>content</em> <span class='red'>editable</span> and has a couple of <em><strong>child nodes</strong></em> within it</div>
<br />
<br />
<a href="#" onm ouseover="alert(getSelectedNodes())">hover here</a>
</body>
</html>

解决方法:

这是一个版本,它为您提供实际选定和部分选择的节点而不是克隆.或者你可以使用我的Rangy库,它有一个Range对象的getNodes()方法,可以在IE< 9.

function nextNode(node) {
    if (node.hasChildNodes()) {
        return node.firstChild;
    } else {
        while (node && !node.nextSibling) {
            node = node.parentNode;
        }
        if (!node) {
            return null;
        }
        return node.nextSibling;
    }
}

function getRangeSelectedNodes(range) {
    var node = range.startContainer;
    var endNode = range.endContainer;

    // Special case for a range that is contained within a single node
    if (node == endNode) {
        return [node];
    }

    // Iterate nodes until we hit the end container
    var rangeNodes = [];
    while (node && node != endNode) {
        rangeNodes.push( node = nextNode(node) );
    }

    // Add partially selected nodes at the start of the range
    node = range.startContainer;
    while (node && node != range.commonAncestorContainer) {
        rangeNodes.unshift(node);
        node = node.parentNode;
    }

    return rangeNodes;
}

function getSelectedNodes() {
    if (window.getSelection) {
        var sel = window.getSelection();
        if (!sel.isCollapsed) {
            return getRangeSelectedNodes(sel.getRangeAt(0));
        }
    }
    return [];
}

标签：html,javascript,wysiwyg
来源： https://codeday.me/bug/20190918/1810909.html