Question

我正在尝试按下回车键时创建一个新段落。我能做到这一点并且效果很好。但现在说光标是一个段落的中间 - 当按下enter时，我试图选择从光标位置到段落末尾的范围。从现有段落中删除它并将其添加到下面的新段落中。

我正在尝试修改答案中的代码：Contenteditable - extract text from caret to end of element

$(document).on('keydown', 'p[contenteditable="true"]', function(e) {
    if(e.which == 13) { //new paragraph on enter/return
        e.preventDefault();
        var sel = window.getSelection();
    if (sel.rangeCount) {
        var selRange = sel.getRangeAt(0);
        var blockEl = selRange.endContainer.parentNode;
        var range = selRange.cloneRange();
            range.selectNodeContents(blockEl);
            range.setStart(selRange.endContainer, selRange.endOffset);
            remainingText = range.extractContents();
        $(this).after('<p contenteditable = "true">'+ remainingText +'</p>');
        $(this).next('p').focus();

    }

我没有取得多大成功 - 主要是由于我对范围，节点和选择对象缺乏了解。有人能够解释这些对象是如何工作的，以及我如何调整上面的答案以适应我的情况。

http://jsfiddle.net/UU4Cg/17/

Answer 1

子串版本：

$(document).on('keydown', 'p[contenteditable="true"]', function(e) {
    if(e.which == 13) { //new paragraph on enter/return
        e.preventDefault();
        cursorIndex = window.getSelection().getRangeAt(0).startOffset;
        textBefore = $(this).text().substring(0, cursorIndex);
        textAfter = $(this).text().substring(cursorIndex);
        $(this).text(textBefore); 
        $(this).after('<p contenteditable = "true">'+ textAfter +'</p>');
        $(this).next('p').focus();

    }
}

Answer 2

以下是一些改编自another answer的代码，用于删除Rangy依赖：

var sel = window.getSelection();
if (sel.rangeCount > 0) {
    // Create a copy of the selection range to work with
    var range = sel.getRangeAt(0).cloneRange();

    // Get the containing paragraph
    var p = range.commonAncestorContainer;
    while (p && (p.nodeType != 1 || p.tagName != "P") ) {
        p = p.parentNode;
    }

    if (p) {
        // Place the end of the range after the paragraph
        range.setEndAfter(p);

        // Extract the contents of the paragraph after the caret into a fragment
        var contentAfterRangeStart = range.extractContents();

        // Collapse the range immediately after the paragraph
        range.setStartAfter(p);
        range.collapse(true);

        // Insert the content
        range.insertNode(contentAfterRangeStart);

        // Move the caret to the insertion point
        range.setStartAfter(p);
        range.collapse(true);
        sel.removeAllRanges();
        sel.addRange(range);
    }
}

Answer 3

试试这个。

      function placeCaretAtEnd(el) {
        el.focus();
        if (typeof window.getSelection != "undefined"
        && typeof document.createRange != "undefined") {
            var range = document.createRange();

            range.selectNodeContents(el);
            range.collapse(false);
            var sel = window.getSelection();
            sel.removeAllRanges();
            sel.addRange(range);
        } else if (typeof document.body.createTextRange != "undefined") {
            var textRange = document.body.createTextRange();
            textRange.moveToElementText(el);
            textRange.collapse(false);
            textRange.select();
        }
    }

Contenteditable / jQuery / Javascript - 从光标/插入符号到段落末尾选择文本

3 个答案: