window.getSelection()与HTML标签的偏移量?
如果我有以下HTML:
Vivamus luctus urna sed urna ultricies ac tempor dui sagittis.
我在mouseup
上运行一个事件,它可以看到所选文本的范围:
$(".content").on("mouseup", function () { var start = window.getSelection().baseOffset; var end = window.getSelection().focusOffset; if (start < end) { var start = window.getSelection().baseOffset; var end = window.getSelection().focusOffset; } else { var start = window.getSelection().focusOffset; var end = window.getSelection().baseOffset; } console.log(window.getSelection()); console.log(start + ", " + end); });
我从内容中选择Vivamus
这个词,它会记录1, 8
,因为这是选择的范围。
但是, 如果我选择单词urna
,它将记录urna
,但不会考虑HTML的元素。
无论如何, focusOffset
和baseOffset
还要计算HTML标签,而不仅仅是文本?
更新
实例: http : //jsfiddle.net/FLwxj/61/
使用clearSelection()
函数和替换方法 ,我能够实现所需的结果。
var txt = $('#Text').html(); $('#Text').html( txt.replace(/<\/span>(?:\s)*/g, '') ); clearSelection();
资料来源:
-
clearSelection()
: https : //stackoverflow.com/a/6562764/1085891 - 替换方法: https : //stackoverflow.com/a/7168142/1085891
您可以在下面找到解决问题的方法。 我把它们放在代码效率的顺序。
工作方案
-
https://stackoverflow.com/a/8697302/1085891 ( 实例 )
window.highlight = function() { var selection = window.getSelection().getRangeAt(0); var selectedText = selection.extractContents(); var span = document.createElement("span"); span.style.backgroundColor = "yellow"; span.appendChild(selectedText); span.onclick = function (ev) { this.parentNode.insertBefore( document.createTextNode(this.innerHTML), this ); this.parentNode.removeChild(this); } selection.insertNode(span); }
-
https://stackoverflow.com/a/1623974/1085891 ( 实例 )
$(".content").on("mouseup", function () { makeEditableAndHighlight('yellow'); }); function makeEditableAndHighlight(colour) { sel = window.getSelection(); if (sel.rangeCount && sel.getRangeAt) { range = sel.getRangeAt(0); } document.designMode = "on"; if (range) { sel.removeAllRanges(); sel.addRange(range); } // Use HiliteColor since some browsers apply BackColor to the whole block if (!document.execCommand("HiliteColor", false, colour)) { document.execCommand("BackColor", false, colour); } document.designMode = "off"; } function highlight(colour) { var range, sel; if (window.getSelection) { // IE9 and non-IE try { if (!document.execCommand("BackColor", false, colour)) { makeEditableAndHighlight(colour); } } catch (ex) { makeEditableAndHighlight(colour) } } else if (document.selection && document.selection.createRange) { // IE <= 8 case range = document.selection.createRange(); range.execCommand("BackColor", false, colour); } }
其他有用的方案: