Copy Download link

copyDownloadLink.uc.js

// ==UserScript==
// @id             copyDownloadLink
// @name           Copy Download Link
// @version        1.2
// @namespace      simon
// @author         Simon Chan
// @description    Add a button to copy download link.
// @include        chrome://mozapps/content/downloads/unknownContentType.xul
// @run-at         document-end
// ==/UserScript==

(function() {
if(window.location.href != "chrome://mozapps/content/downloads/unknownContentType.xul")
return;

const {classes: Cc, interfaces: Ci, results: Cr} = Components;
const CB = Cc['@mozilla.org/widget/clipboardhelper;1']
             .getService(Ci.nsIClipboardHelper);
    var copyButton = document.createElement("button");
    copyButton.className = "dialog-button";
    copyButton.setAttribute("label", "Copy Link");
    copyButton.addEventListener("click", function () {
        // GM_setClipboard(dialog.mLauncher.source.spec);
        CB.copyString(dialog.mLauncher.source.spec);
    });
    var saveButton = document.documentElement.getButton("accept");;
    saveButton.parentNode.insertBefore(copyButton, saveButton);

    document.querySelector("#mode").addEventListener("select", function () {
        if (dialog.dialogElement("save").selected) {
            if (!document.querySelector("#locationtext")) {
                var locationtext = document.querySelector("#location").parentNode.insertBefore(document.createElement("textbox"), document.querySelector("#location"));
                locationtext.id = "locationtext";
                locationtext.setAttribute("style", "margin-top:-2px;margin-bottom:-3px");
                locationtext.value = document.querySelector("#location").value;
            }
            document.querySelector("#location").hidden = true;
            document.querySelector("#locationtext").hidden = false;
        } else {
            document.querySelector("#locationtext").hidden = true;
            document.querySelector("#location").hidden = false;
        }
    }, false)
    dialog.dialogElement("save").selected && dialog.dialogElement("save").click();
    window.addEventListener("dialogaccept", function () {
        if ((document.querySelector("#locationtext").value != document.querySelector("#location").value) && dialog.dialogElement("save").selected) {
            dialog.mLauncher.saveToDisk(dialog.promptForSaveToFile(dialog.mLauncher, window, document.querySelector("#locationtext").value), 1);
            dialog.onCancel = null;
            document.documentElement.removeAttribute("ondialogaccept");
        }
    });
})()