Chrome擴展程序已選定文字

Question

我正在尋找一種方法，將我所選文本周圍的框架/邊框（如Evernote Web Clipper：下圖）添加到我的Chrome擴展程序中。

為此，我想捕獲選擇的HTML代碼並在當前所選文本周圍添加框架/邊框。 但我不知道我怎么能這樣做......

這是我的代碼：

manifest.json的：

{
 "name": "Selected Text",
 "version": "0.1",
 "description": "Selected Text",
 "manifest_version": 2,
 "browser_action": {
   "default_title": "Selected Text",
   "default_icon": "online.png",
   "default_popup": "popup.html" 
 },
 "permissions": [
   "tabs",
   "<all_urls>"
 ],
 "content_scripts": [
   {
     "matches": ["<all_urls>"],
     "js": ["popup.js"]
   }
 ]
}

popup.js：

chrome.tabs.executeScript( {
    code: "window.getSelection().toString();"
    }, function(selection) {

      console.log(selection[0]);
      if(selection[0].length > 0){
        document.getElementById("text").value = selection[0];
      }
});

popup.html：

<!DOCTYPE html> 
<html>
  <head>
    <script src="popup.js"></script>
    <style>
      body { width: 300px; }
      textarea { width: 250px; height: 100px;}
    </style>
  </head>
  <body>
    <textarea id="text"> </textarea>
  </body>
</html>

Answer 1

你可以使用像這樣的mouseup事件：

 // Add event listener for mouseup (there is no event for selection) document.addEventListener('mouseup', highlightSelectedBlock, false) function highlightSelectedBlock () { // TODO Filter only selections // Get Node where selection starts let elementWhereSelectionStart = window.getSelection().anchorNode // TODO Get Node where selection ends with Selection.focusNode() // TODO Get Nodes in between start and end of selection // I've hardcoded finding closest block element for a simplicity let closestBlockElement = elementWhereSelectionStart.parentNode // Add non disturbing border to selected elements // For simplicity I've adding outline only for the start element closestBlockElement.style.outline = '1px solid blue' // TODO Clear outline on some event: saving selection, ending selection etc setTimeout(() => { closestBlockElement.style.outline = 'none' }, 2000) }

 <p>First line <p>Second line <p>Third line

但對於現實生活來說，它應該更復雜，想一想：

鍵盤選擇
突出幾個元素，這可能很棘手
選擇里面的圖像
刪除許多不同情況下的突出顯示

也許用window.requestAnimationFrame（）不斷地為選擇對象輪詢DOM是一個好主意，而不是向mouseup添加事件監聽器。

Chrome擴展程序已選定文字

問題描述

1 個解決方案

解決方案1
2 2016-11-22 16:42:37

Chrome擴展程序已選定文字

問題描述

1 個解決方案

解決方案1 2 2016-11-22 16:42:37

解決方案1
2 2016-11-22 16:42:37