检测在文本中右键单击的单词 [英] Detect which word has been right-clicked on within a text

问题描述

对于我的应用程序，我想在有人点击右键时显示​​自定义上下文菜单。如果右键单击任何单词，我想为它显示一些额外的选项。我抬头看了网，我找到了解决方法，如果单击它后如何获取单词，我尝试修改它以进行右键单击但不知道它无法正常工作。

For my application, I want to show a custom context menu whenever someone right clicks. And if the right click was on any word, I want to show some extra option for it. I looked up on the net and I found solution on how to get the word when it is left clicked, I tried to modify it for the right-click but somehow couldn't it to work.

下面的代码，左键单击它会显示一个带有单词的警告，并且在进行右键单击时，预计会执行相同的操作。但有时它不显示任何弹出窗口，当它在弹出窗口中显示前一个右键单击的单词时。

The code below, on doing a left click it shows an alert with the word and on doing a right click it's expected to do the same. But sometimes it doesn't show any pop-up and when it shows the word in the pop-up the previous right-clicked word.

$('.text123').click(function(e){
   s = window.getSelection();
   var range = s.getRangeAt(0);
   var node = s.anchorNode;
   while(range.toString().indexOf(' ') != 0) {                 
     range.setStart(node,(range.startOffset -1));
   }
   range.setStart(node, range.startOffset +1);
   do{
     range.setEnd(node,range.endOffset + 1);
   }while(range.toString().indexOf(' ') == -1 && range.toString().trim() != '');
   var str = range.toString().trim();
   alert(str);
});

$(".text123").mouseup(function(){
   var e = window.event;
   if (e.button == 2)
   {
     jQuery(document.elementFromPoint(e.pageX, e.pageY)).click();
   }
});

我正在 Edge 浏览器上进行测试，因为我想在UWP app。

I am testing on Edge browser as I want to use the code in UWP app.

推荐答案

经过一些搜索和测试，这似乎适用于EDGE。

After some search and test, this it seems to work on EDGE.

JSFiddle demo。

这是主要变化：

$(".text123").on('contextmenu', function(evt){
   evt.preventDefault(); // with this the context menu will not open
   var e = window.event;
   if (e.button == 2) {
     /* START - And this make the selection before emulate the left click */
     var range = document.caretRangeFromPoint(e.pageX, e.pageY);
     var selection = window.getSelection();
     selection.removeAllRanges();
     selection.addRange(range);
     /* END */
     jQuery(document.elementFromPoint(e.pageX, e.pageY)).click();
   }
});

更新

此更新用于回答滚动页面问题以及第一个和最后一个单词选择错误。

This update is for answer at the scroll page problem and the first and last word selection error.

新JSFiddle。

$('.text123').click(function(e) {
    s = window.getSelection();
    var range = s.getRangeAt(0);
    var node = s.anchorNode;

    // ###  && range.startOffset != 0 <--- This check very first char
    while (range.toString().indexOf(' ') != 0 && range.startOffset != 0) {
        range.setStart(node, (range.startOffset - 1));
    }
    range.setStart(node, range.startOffset + 1);


    do {
        range.setEnd(node, range.endOffset + 1);
    } while (range.toString().indexOf(' ') == -1 && range.toString().trim() != '' && range.endOffset < range.endContainer.length);
    // ### && range.endOffset < range.endContainer.length <--- This check the last char

    var str = range.toString().trim();

    alert(str);
});


$(".text123").on('contextmenu', function(evt) {
    evt.preventDefault();
    var e = window.event;
    if (e.button == 2) {
        // ### - $(document).scrollTop() <--- This will fix the page scroll
        var range = document.caretRangeFromPoint(e.pageX, e.pageY - $(document).scrollTop()); 
        var selection = window.getSelection();
        selection.removeAllRanges();
        selection.addRange(range);
        // ### - $(document).scrollTop() <--- This will fix the page scroll
        jQuery(document.elementFromPoint(e.pageX, e.pageY - $(document).scrollTop())).click(); 
    }
});

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