CODEWITHSUNDEEP
javascriptfirefoxfirefox-addonfirefox-addon-sdk
RobiGo
RobiGo

Reputation: 95

Copy to clipboard in Firefox extension not working

I want to write a Firefox extension, with copy to clipboard and execute an external program with selected text parameter. I have found this link MDN Using Clipboard for clipboard copy, but is not working. When I try to execute with cfx run always I get this error message

(c:\Works\Firefox\addon-sdk-1.17) c:\Works\Firefox\ExternalOpener>cfx run

The following lines from file c:\Works\Firefox\ExternalOpener\lib\main.js: 11: const gClipboardHelper = Components.classes["@mozilla.org/widget/clipboard helper;1"].getService(Components.interfaces.nsIClipboardHelper); use 'Components' to access chrome authority. To do so, you need to add a line somewhat like the following:

const {Cc,Ci} = require("chrome");

Then you can use any shortcuts to its properties that you import from the 'chrome' module ('Cc', 'Ci', 'Cm', 'Cr', and 'Cu' for the 'classes', 'interfaces', 'manager', 'results', and 'utils' properties, respectively. And components for Components object itself).

This is my main.js

var contextMenu = require("sdk/context-menu");
 var menuItem = contextMenu.Item({
  label: "Open in External",
  context: contextMenu.SelectionContext(),
  contentScript: 'self.on("click", function () {' +
                 '  var text = window.getSelection().toString();' +
                 '  self.postMessage(text);' +
                 '});',
  onMessage: function (selectionText) {
    console.log(selectionText);
    const gClipboardHelper = Components.classes["@mozilla.org/widget/clipboardhelper;1"].getService(Components.interfaces.nsIClipboardHelper);
gClipboardHelper.copyString(selectionText);

  }
});

Any idea is welcome, about clipboard copy or external application execution with a parameter...

Thanks

Upvotes: 1

Views: 1380

Answers (2)

winhowes
winhowes

Reputation: 8065

I think this is exactly what you're looking for: https://developer.mozilla.org/en-US/Add-ons/SDK/High-Level_APIs/clipboard

You can use it like this:

var clipboard = require("sdk/clipboard");
clipboard.set("Lorem ipsum dolor sit amet");
var contents = clipboard.get();

Upvotes: 0

matagus
matagus

Reputation: 6206

That doc belongs to XUL based addons, while the addon you're writting is an Addon-SDK based one.

In order to use Component.classes and Component.interfaces in your sdk-based addons, you need Chrome Authority.

What that error is telling you is that Components.classes and Components.interfaces are no defined. In order to use the you must first require them:

const {Cc, Ci} = require("chrome");

And then use them this way:

const gClipboardHelper =Cc["@mozilla.org/widget/clipboardhelper;1"].getService(Ci.nsIClipboardHelper);
gClipboardHelper.copyString(selectionText);

Cc stands for Component.classes, and Ci for Components.interfaces. Please read the doc about Chrome Authority to understand them and the other properties ;)

Upvotes: 2

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