在mouseup文本选择+ HTML5/jQuery上覆盖突出显示的文本 [英] Overwrite highlighted text on mouseup text selection+ HTML5/jQuery

问题描述

我有一个由ML模型在几百个段落中生成的内容，每个段落都有一些突出显示的内容.

I have some content generated by a ML model in 100s of paragraphs, each para has some highlighted content.

有时候，突出显示的数据不正确，我们希望用户选择文本，然后再次突出显示以纠正它.

<p> Contrary to popular belief, <span class='highlighted'>Lorem</span>Ipsum is not simply random text. It has roots in a piece of popular classical Latin literature from 45 <span class='highlighted'>BC</span>, making it over 2000 years old.</p>

在此示例中，用户可能要选择:

In this example, the user might want to select:

1. 蜂胶
2. 拉丁语
3. 公元前45年
4. 2000年

下面的代码适用于#2和#4，但是我已经无法突出显示它适用于#1和#3了.

Below code works for #2 and #4, but I am not able to do it for #1 and #3 as its already highlighted.

我正在使用此功能 getSelectionText()选择文本.

I am using this function getSelectionText() to select the text.

$('div.content>p').on('mouseup', function(e){
    var toselected = getSelectionText();
    var para = $(this).html();
    var start = para.indexOf(toselected);
    var end = start + toselected.length;
    var html = para.replace(toselected, '<span class="highlighted">' toselected + '</span>');
    var obj = {"content": $(this).text(), "indices_range":[[start, end]]}
    $.post('/update/<content_id>', data:tojson(obj), function(){        $(e.target).html(html);}) 

});

也想知道，如果相同的文本出现两次或多次，我如何获得开始索引，结束索引. popular.?

Also wondering, how can I get the start, end indices if same text occurs twice or multiple times eg. popular.?

推荐答案

使用选择 API进行控制选择文本节点.代替使用<span>，而使用<mark>标记.
使用 <mark>

Use Range and Selection APIs to control selection of text nodes. Instead of using <span>, use <mark> tags.
Reasons to use <mark>

• 100％语义
• 这种用法很少见，这意味着CSS选择器冲突的可能性很小.
• 默认情况下，它已经突出显示了其内容.

用法:像平常一样，用鼠标突出显示文本. <mark>s不嵌套(这是一件好事).为了删除突出显示的区域，请使用鼠标右键单击它.

Usage: Highlight text with mouse like you would normally. The <mark>s do not nest (that's a good thing). In order to remove a highlighted area, click it using the right mouse button.

const mark = event => {
  const current = event.currentTarget;
  const target = event.target;
  const select = document.getSelection();
  if (event.which === 1) {
    const range = select.getRangeAt(0);
    const text = range.toString();
    const content = range.extractContents();
    const mark = document.createElement('MARK');
    mark.textContent = text;
    range.insertNode(mark);
  } else if (event.which === 3) {
    event.preventDefault();
    if (target.tagName === 'MARK') {
      const text = target.textContent;
      const tNode = document.createTextNode(text);
      target.parentNode.replaceChild(tNode, target);
    }
  }
  select.removeAllRanges();
  current.normalize();
  return false;
}

$(document).on("contextmenu mouseup", mark);

::selection {
  background: tomato;
  color: white;
}

<p> Contrary to popular belief, <mark>Lorem</mark>Ipsum is not simply random text. It has roots in a piece of popular classical Latin literature from 45 <mark>BC</mark>, making it over 2000 years old.</p>

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

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