1  const crypto = require('crypto');
 2  const { clipboard } = require('electron');
 3  
 4  // Extended: Represents the clipboard used for copying and pasting in Atom.
 5  //
 6  // An instance of this class is always available as the `atom.clipboard` global.
 7  //
 8  // ## Examples
 9  //
10  // ```js
11  // atom.clipboard.write('hello')
12  //
13  // console.log(atom.clipboard.read()) // 'hello'
14  // ```
15  module.exports = class Clipboard {
16    constructor() {
17      this.reset();
18    }
19  
20    reset() {
21      this.metadata = null;
22      this.signatureForMetadata = null;
23    }
24  
25    // Creates an `md5` hash of some text.
26    //
27    // * `text` A {String} to hash.
28    //
29    // Returns a hashed {String}.
30    md5(text) {
31      return crypto
32        .createHash('md5')
33        .update(text, 'utf8')
34        .digest('hex');
35    }
36  
37    // Public: Write the given text to the clipboard.
38    //
39    // The metadata associated with the text is available by calling
40    // {::readWithMetadata}.
41    //
42    // * `text` The {String} to store.
43    // * `metadata` (optional) The additional info to associate with the text.
44    write(text, metadata) {
45      this.signatureForMetadata = this.md5(text);
46      this.metadata = metadata;
47      clipboard.writeText(text);
48    }
49  
50    // Public: Read the text from the clipboard.
51    //
52    // Returns a {String}.
53    read() {
54      return clipboard.readText();
55    }
56  
57    // Public: Read the text from the clipboard and return both the text and the
58    // associated metadata.
59    //
60    // Returns an {Object} with the following keys:
61    // * `text` The {String} clipboard text.
62    // * `metadata` The metadata stored by an earlier call to {::write}.
63    readWithMetadata() {
64      const text = this.read();
65      if (this.signatureForMetadata === this.md5(text)) {
66        return { text, metadata: this.metadata };
67      } else {
68        return { text };
69      }
70    }
71  };