Question

我正在寻找一个明确的跨浏览器解决方案，当contentEditable ='on'＆lt; div＆gt;时，将光标/插入位置设置为最后一个已知位置重新获得焦点。看来内容可编辑div的默认功能是每次单击它时将插入符/光标移动到div中文本的开头，这是不可取的。

我相信当他们离开div的焦点时我必须在变量中存储当前光标位置，然后当他们再次聚焦时重新设置它，但是我无法将它放在一起，或者找到一个有效的代码示例。

如果有人有任何想法，工作代码片段或样本我很乐意看到它们。

我还没有任何代码，但这就是我所拥有的：

<script type="text/javascript">
// jQuery
$(document).ready(function() {
   $('#area').focus(function() { .. }  // focus I would imagine I need.
}
</script>
<div id="area" contentEditable="true"></div>

PS。我已经尝试过此资源，但它似乎不适用于＆lt; div＆gt;。也许只适用于textarea（How to move cursor to end of contenteditable entity）

Answer 1

这与基于标准的浏览器兼容，但在IE中可能会失败。我提供它作为起点。 IE不支持DOM Range。

var editable = document.getElementById('editable'),
    selection, range;

// Populates selection and range variables
var captureSelection = function(e) {
    // Don't capture selection outside editable region
    var isOrContainsAnchor = false,
        isOrContainsFocus = false,
        sel = window.getSelection(),
        parentAnchor = sel.anchorNode,
        parentFocus = sel.focusNode;

    while(parentAnchor && parentAnchor != document.documentElement) {
        if(parentAnchor == editable) {
            isOrContainsAnchor = true;
        }
        parentAnchor = parentAnchor.parentNode;
    }

    while(parentFocus && parentFocus != document.documentElement) {
        if(parentFocus == editable) {
            isOrContainsFocus = true;
        }
        parentFocus = parentFocus.parentNode;
    }

    if(!isOrContainsAnchor || !isOrContainsFocus) {
        return;
    }

    selection = window.getSelection();

    // Get range (standards)
    if(selection.getRangeAt !== undefined) {
        range = selection.getRangeAt(0);

    // Get range (Safari 2)
    } else if(
        document.createRange &&
        selection.anchorNode &&
        selection.anchorOffset &&
        selection.focusNode &&
        selection.focusOffset
    ) {
        range = document.createRange();
        range.setStart(selection.anchorNode, selection.anchorOffset);
        range.setEnd(selection.focusNode, selection.focusOffset);
    } else {
        // Failure here, not handled by the rest of the script.
        // Probably IE or some older browser
    }
};

// Recalculate selection while typing
editable.onkeyup = captureSelection;

// Recalculate selection after clicking/drag-selecting
editable.onmousedown = function(e) {
    editable.className = editable.className + ' selecting';
};
document.onmouseup = function(e) {
    if(editable.className.match(/\sselecting(\s|$)/)) {
        editable.className = editable.className.replace(/ selecting(\s|$)/, '');
        captureSelection();
    }
};

editable.onblur = function(e) {
    var cursorStart = document.createElement('span'),
        collapsed = !!range.collapsed;

    cursorStart.id = 'cursorStart';
    cursorStart.appendChild(document.createTextNode('—'));

    // Insert beginning cursor marker
    range.insertNode(cursorStart);

    // Insert end cursor marker if any text is selected
    if(!collapsed) {
        var cursorEnd = document.createElement('span');
        cursorEnd.id = 'cursorEnd';
        range.collapse();
        range.insertNode(cursorEnd);
    }
};

// Add callbacks to afterFocus to be called after cursor is replaced
// if you like, this would be useful for styling buttons and so on
var afterFocus = [];
editable.onfocus = function(e) {
    // Slight delay will avoid the initial selection
    // (at start or of contents depending on browser) being mistaken
    setTimeout(function() {
        var cursorStart = document.getElementById('cursorStart'),
            cursorEnd = document.getElementById('cursorEnd');

        // Don't do anything if user is creating a new selection
        if(editable.className.match(/\sselecting(\s|$)/)) {
            if(cursorStart) {
                cursorStart.parentNode.removeChild(cursorStart);
            }
            if(cursorEnd) {
                cursorEnd.parentNode.removeChild(cursorEnd);
            }
        } else if(cursorStart) {
            captureSelection();
            var range = document.createRange();

            if(cursorEnd) {
                range.setStartAfter(cursorStart);
                range.setEndBefore(cursorEnd);

                // Delete cursor markers
                cursorStart.parentNode.removeChild(cursorStart);
                cursorEnd.parentNode.removeChild(cursorEnd);

                // Select range
                selection.removeAllRanges();
                selection.addRange(range);
            } else {
                range.selectNode(cursorStart);

                // Select range
                selection.removeAllRanges();
                selection.addRange(range);

                // Delete cursor marker
                document.execCommand('delete', false, null);
            }
        }

        // Call callbacks here
        for(var i = 0; i < afterFocus.length; i++) {
            afterFocus[i]();
        }
        afterFocus = [];

        // Register selection again
        captureSelection();
    }, 10);
};

Answer 2

<强>更新

我编写了一个名为Rangy的跨浏览器范围和选择库，其中包含我在下面发布的代码的改进版本。您可以使用selection save and restore module来解决这个问题，但如果您在项目中没有做任何其他选择而且不需要大量的问题，我会很想使用@Nico Burns's answer之类的内容。图书馆。

上一个回答

您可以使用IERange（http://code.google.com/p/ierange/）将IE的TextRange转换为类似DOM范围的内容，并将其与eyelidlessness的起点结合使用。就个人而言，我只会使用IERange的算法来做范围＆lt; - ＆gt; TextRange转换而不是使用整个事物。 IE的选择对象没有focusNode和anchorNode属性，但您应该只能使用从选择中获得的Range / TextRange。

我可能会把一些东西放在一起做这件事，如果我这样做的话会在这里回复。

编辑：

我已经创建了一个执行此操作的脚本演示。它适用于我迄今为止尝试过的所有内容，除了Opera 9中的一个错误，我还没来得及查看。它适用的浏览器是IE 5.5,6和7，Chrome 2，Firefox 2,3和3.5，以及Safari 4，都在Windows上。

http://www.timdown.co.uk/code/selections/

请注意，可以在浏览器中向后进行选择，以便焦点节点位于选择的开始处，并且按下右或左光标键会将插入符号移动到相对于选择开始的位置。我不认为在恢复选择时可以复制它，因此焦点节点始终位于选择的末尾。

~~我会尽快写完这篇文章。~~

Answer 3

我有一个相关的情况，我特别需要将光标位置设置为一个contenteditable div的END。我不想使用像Rangy这样的完整的图书馆，而且很多解决方案都太重量级了。

最后，我想出了这个简单的jQuery函数，将克拉位置设置为一个可信的div的结尾：

$.fn.focusEnd = function() {
    $(this).focus();
    var tmp = $('<span />').appendTo($(this)),
        node = tmp.get(0),
        range = null,
        sel = null;

    if (document.selection) {
        range = document.body.createTextRange();
        range.moveToElementText(node);
        range.select();
    } else if (window.getSelection) {
        range = document.createRange();
        range.selectNode(node);
        sel = window.getSelection();
        sel.removeAllRanges();
        sel.addRange(range);
    }
    tmp.remove();
    return this;
}

理论很简单：在可编辑的末尾附加一个跨度，选择它，然后删除跨度 - 让我们在div的末尾添加一个光标。您可以调整此解决方案以在任何位置插入跨度，从而将光标放在特定位置。

用法很简单：

$('#editable').focusEnd();

就是这样！

Answer 4

我接受了Nico Burns的回答并使用jQuery创建了它：

通用：每div contentEditable="true"
更短的

您需要jQuery 1.6或更高版本：

savedRanges = new Object();
$('div[contenteditable="true"]').focus(function(){
    var s = window.getSelection();
    var t = $('div[contenteditable="true"]').index(this);
    if (typeof(savedRanges[t]) === "undefined"){
        savedRanges[t]= new Range();
    } else if(s.rangeCount > 0) {
        s.removeAllRanges();
        s.addRange(savedRanges[t]);
    }
}).bind("mouseup keyup",function(){
    var t = $('div[contenteditable="true"]').index(this);
    savedRanges[t] = window.getSelection().getRangeAt(0);
}).on("mousedown click",function(e){
    if(!$(this).is(":focus")){
        e.stopPropagation();
        e.preventDefault();
        $(this).focus();
    }
});

savedRanges = new Object();
$('div[contenteditable="true"]').focus(function(){
    var s = window.getSelection();
    var t = $('div[contenteditable="true"]').index(this);
    if (typeof(savedRanges[t]) === "undefined"){
        savedRanges[t]= new Range();
    } else if(s.rangeCount > 0) {
        s.removeAllRanges();
        s.addRange(savedRanges[t]);
    }
}).bind("mouseup keyup",function(){
    var t = $('div[contenteditable="true"]').index(this);
    savedRanges[t] = window.getSelection().getRangeAt(0);
}).on("mousedown click",function(e){
    if(!$(this).is(":focus")){
        e.stopPropagation();
        e.preventDefault();
        $(this).focus();
    }
});

div[contenteditable] {
    padding: 1em;
    font-family: Arial;
    outline: 1px solid rgba(0,0,0,0.5);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div contentEditable="true"></div>
<div contentEditable="true"></div>
<div contentEditable="true"></div>

Answer 5

在玩完之后我修改了上面的eyelidless'答案，并使其成为一个jQuery插件，所以你可以做其中一个：

var html = "The quick brown fox";
$div.html(html);

// Select at the text "quick":
$div.setContentEditableSelection(4, 5);

// Select at the beginning of the contenteditable div:
$div.setContentEditableSelection(0);

// Select at the end of the contenteditable div:
$div.setContentEditableSelection(html.length);

请原谅长代码帖子，但它可以帮助某人：

$.fn.setContentEditableSelection = function(position, length) {
    if (typeof(length) == "undefined") {
        length = 0;
    }

    return this.each(function() {
        var $this = $(this);
        var editable = this;
        var selection;
        var range;

        var html = $this.html();
        html = html.substring(0, position) +
            '<a id="cursorStart"></a>' +
            html.substring(position, position + length) +
            '<a id="cursorEnd"></a>' +
            html.substring(position + length, html.length);
        console.log(html);
        $this.html(html);

        // Populates selection and range variables
        var captureSelection = function(e) {
            // Don't capture selection outside editable region
            var isOrContainsAnchor = false,
                isOrContainsFocus = false,
                sel = window.getSelection(),
                parentAnchor = sel.anchorNode,
                parentFocus = sel.focusNode;

            while (parentAnchor && parentAnchor != document.documentElement) {
                if (parentAnchor == editable) {
                    isOrContainsAnchor = true;
                }
                parentAnchor = parentAnchor.parentNode;
            }

            while (parentFocus && parentFocus != document.documentElement) {
                if (parentFocus == editable) {
                    isOrContainsFocus = true;
                }
                parentFocus = parentFocus.parentNode;
            }

            if (!isOrContainsAnchor || !isOrContainsFocus) {
                return;
            }

            selection = window.getSelection();

            // Get range (standards)
            if (selection.getRangeAt !== undefined) {
                range = selection.getRangeAt(0);

                // Get range (Safari 2)
            } else if (
                document.createRange &&
                selection.anchorNode &&
                selection.anchorOffset &&
                selection.focusNode &&
                selection.focusOffset
            ) {
                range = document.createRange();
                range.setStart(selection.anchorNode, selection.anchorOffset);
                range.setEnd(selection.focusNode, selection.focusOffset);
            } else {
                // Failure here, not handled by the rest of the script.
                // Probably IE or some older browser
            }
        };

        // Slight delay will avoid the initial selection
        // (at start or of contents depending on browser) being mistaken
        setTimeout(function() {
            var cursorStart = document.getElementById('cursorStart');
            var cursorEnd = document.getElementById('cursorEnd');

            // Don't do anything if user is creating a new selection
            if (editable.className.match(/\sselecting(\s|$)/)) {
                if (cursorStart) {
                    cursorStart.parentNode.removeChild(cursorStart);
                }
                if (cursorEnd) {
                    cursorEnd.parentNode.removeChild(cursorEnd);
                }
            } else if (cursorStart) {
                captureSelection();
                range = document.createRange();

                if (cursorEnd) {
                    range.setStartAfter(cursorStart);
                    range.setEndBefore(cursorEnd);

                    // Delete cursor markers
                    cursorStart.parentNode.removeChild(cursorStart);
                    cursorEnd.parentNode.removeChild(cursorEnd);

                    // Select range
                    selection.removeAllRanges();
                    selection.addRange(range);
                } else {
                    range.selectNode(cursorStart);

                    // Select range
                    selection.removeAllRanges();
                    selection.addRange(range);

                    // Delete cursor marker
                    document.execCommand('delete', false, null);
                }
            }

            // Register selection again
            captureSelection();
        }, 10);
    });
};

Answer 6

您可以利用现代浏览器支持的selectNodeContents。

var el = document.getElementById('idOfYoursContentEditable');
var selection = window.getSelection();
var range = document.createRange();
selection.removeAllRanges();
range.selectNodeContents(el);
range.collapse(false);
selection.addRange(range);
el.focus();

Answer 7

在Firefox中，您可能在子节点（o_div.childNodes[0]）

中包含div的文本

var range = document.createRange();

range.setStart(o_div.childNodes[0],last_caret_pos);
range.setEnd(o_div.childNodes[0],last_caret_pos);
range.collapse(false);

var sel = window.getSelection(); 
sel.removeAllRanges();
sel.addRange(range);

在contentEditable <div> </div>上设置光标位置

8 个答案: