在SDK中获取鼠标坐标首次右键单击 [英] Getting mouse coordinates in SDK first-time right-click

问题描述

对于一个SDK插件，我试图检测，右键单击，最接近的页锚（如在这里描述）。

由于JavaScript没有先创建鼠标事件侦听器，显然无法查询鼠标坐标，因为我不想要一个昂贵的鼠标悬停在每一个页面上运行的时间！ （和轮询重建鼠标监听器是丑陋的，不完全准确无论如何），我希望我可以从点击事件获得鼠标坐标。不幸的是，虽然 self.on（'click' does fire：

1. 
   
2. 添加一个正常的 window.addEventListener（'click'，... 侦听器实际上并没有在SDK内容脚本中被第一个菜单选择出于某种原因被触发（然而，随后会触发）。
   

这里是我的解决方法，但是我想触发当前确切的坐标，而不是节点的坐标：

  var x，y; 
 window.addEventListener（'click'，function（e）{
 if（e.button === 2）{
x = e.clientX; 
y = e.clientY; 
} 
}，true）; 
 
 self.on（'click'，function（node）{
 if（！x）{/ /由于这不是第一次显示，我们在节点上（这是一个元素，而不是文本节点），虽然我们真的想要真正的clientX和clientY whe不是这个模拟基于元素的位置是
 node.dispatchEvent（new MouseEvent（'click'，{
 button：2 
}））; 
} 
 //使用document.caretPositionFromPoint和x和y来确定文本的位置
  

有没有其他的方式来获得鼠标的实际坐标？

解决方案

听众。

这个页面有一堆例子： https://developer.mozilla.org/zh-CN/docs/Mozilla/js-ctypes/Standard_OS_Libraries

<它必须在每个操作系统的基础上完成，虽然它使用JS-Ctypes。如果你担心表演，不要害怕。您可以通过 ChromeWorker s

异步使用代码

For an SDK add-on, I am trying to detect, on right-click, the closest page anchor (as described here).

Since JavaScript apparently has no way to query the mouse coordinates without first creating a mouse event listener, and since I don't want an expensive mouseover listener running all of the time on every single page! (and polling to rebuild a mouse listener is ugly and not fully accurate anyways), I was hoping I could get the mouse coordinates from a click event. Unfortunately, although self.on('click' does fire:

1. This event is without an event object from which mouse coordinates could be obtained
2. Adding a normal window.addEventListener('click',... listener doesn't actually get fired in the SDK content script with the first menu selection for some reason (it does fire subsequently, however).

Here is my workaround, but I want to fire on the current exact coordinates, not the coordinates of the node:

var x, y;
window.addEventListener('click', function (e) {
    if (e.button === 2) {
        x = e.clientX;
        y = e.clientY;
    }
}, true);

self.on('click', function (node) {
    if (!x) { // Since this is not showing the first time, we fire on the node (which is specifically an element, not a text node), though we really want the real clientX and clientY where the mouse is, not this simulation based on where the element is
        node.dispatchEvent(new MouseEvent('click', {
            button: 2
        }));
    }
    // Use document.caretPositionFromPoint with x and y to determine location of text

Is there any other way to get the actual mouse coordinates?

解决方案

You can actually query the mouse coordinates without a mouse listener.

This page has a bunch of examples: https://developer.mozilla.org/en-US/docs/Mozilla/js-ctypes/Standard_OS_Libraries

It has to be done on per OS basis though as it uses JS-Ctypes. If you're worried about performance don't fear at all. You can use the code asynchronously via ChromeWorkers

这篇关于在SDK中获取鼠标坐标首次右键单击的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！