我正在尝试创建一个简单的文本编辑器,在 div 标签上使用 HTML5 contenteditable。如您所知,选定文本在 IE 中的处理方式截然不同。
this.retrieveAnchorNode = function() {
var anchorNode;
if (document.selection)
anchorNode = document.selection.createRange().parentElement();
else if (document.getSelection)
anchorNode = window.getSelection().anchorNode;
}
我正在寻找一种方法来获取选定的文本节点(而不是文本本身),就像我可以在其他浏览器上使用“anchorNode”和“focusNode”一样。我在 IE 上找到的唯一替代方法是“parentElement()”函数,它只能选择 contenteditable div 本身。
有什么想法吗?
最佳答案
这是您需要的函数版本,来自 IERange ,加上我的评论:
function getChildIndex(node) {
var i = 0;
while( (node = node.previousSibling) ) {
i++;
}
return i;
}
function getTextRangeBoundaryPosition(textRange, isStart) {
var workingRange = textRange.duplicate();
workingRange.collapse(isStart);
var containerElement = workingRange.parentElement();
var workingNode = document.createElement("span");
var comparison, workingComparisonType = isStart ?
"StartToStart" : "StartToEnd";
var boundaryPosition, boundaryNode;
// Move the working range through the container's children, starting at
// the end and working backwards, until the working range reaches or goes
// past the boundary we're interested in
do {
containerElement.insertBefore(workingNode, workingNode.previousSibling);
workingRange.moveToElementText(workingNode);
} while ( (comparison = workingRange.compareEndPoints(
workingComparisonType, textRange)) > 0 && workingNode.previousSibling);
// We've now reached or gone past the boundary of the text range we're
// interested in so have identified the node we want
boundaryNode = workingNode.nextSibling;
if (comparison == -1 && boundaryNode) {
// This must be a data node (text, comment, cdata) since we've overshot.
// The working range is collapsed at the start of the node containing
// the text range's boundary, so we move the end of the working range
// to the boundary point and measure the length of its text to get
// the boundary's offset within the node
workingRange.setEndPoint(isStart ? "EndToStart" : "EndToEnd", textRange);
boundaryPosition = {
node: boundaryNode,
offset: workingRange.text.length
};
} else {
// We've hit the boundary exactly, so this must be an element
boundaryPosition = {
node: containerElement,
offset: getChildIndex(workingNode)
};
}
// Clean up
workingNode.parentNode.removeChild(workingNode);
return boundaryPosition;
}
var textRange = document.selection.createRange();
var selectionStart = getTextRangeBoundaryPosition(textRange, true);
// selectionStart has properties 'node' and 'offset'
关于javascript - 如何在IE中的contentEditable div中获取选定的textnode?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3127369/