javascript - 获取 CSS3 列中的文本？

Question

我在一个元素中使用 CSS3 对列的支持(到目前为止，我发现它比现有的大多数 JavaScript 解决方案更健壮和可靠)。

Question: Is it possible to get the text that is in a specific column, in any way?

Answer 1

然后......什么，两个月后？我终于找到了这个问题的答案。它依赖于 document.caretRangeFromPoint (Webkit) or document.caretPositionFromPoint .

var getAllTextInColumn = function(rect){
    /*
        rect should be the size and x,y of the column
        { top, left, width, height }
    */

    if(document.caretRangeFromPoint){
        var caretRangeStart = document.caretRangeFromPoint(rect.left, rect.top);
        var caretRangeEnd = document.caretRangeFromPoint(rect.left+rect.width-1, rect.top+rect.height-1);
    } else {
        return null;
    }

    if(caretRangeStart == null || caretRangeEnd == null) return null;

    var range = document.createRange();
    range.setStart(caretRangeStart.startContainer, caretRangeStart.startOffset);
    range.setEnd(caretRangeEnd.endContainer, caretRangeEnd.endOffset);

    return range.toString();
};