[Greasemonkey] Including External Scripts.

Mon Feb 20 18:04:35 EST 2006

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Christopher E. Granade wrote:
> Thanks for the help. I tried to use the DOM-hack, and it doesn't seem to
> be running the code. I attached a script that I'm working on. Any
> suggestions on why it doesn't work?
> --Chris
Odd. Seems that the attachment was stripped. Including the User Script
below in plain text:

// ==UserScript==
// @name           NSFW Link Blocker
// @description    Uses JavaScript Behaviors to block links marked with
rel="nsfw".
// @include        *
// ==/UserScript==

/**
 * Compatibity note:
 *     Since this script is designed as a userscript for Greasemonkey,
we assume that the hosting browser is Firefox,
 *     version 1.0 or better. Thus, many appropriate checks and graceful
degragations are omitted. Do not use this code in a public-
 *     facing web page.
 */

///////////////////////////////////////////////////////////////////////
// Constants
///////////////////////////////////////////////////////////////////////

var behaviorsURI = "http://bennolan.com/behaviour/behaviour.js";

var myRules = {
    // Place your user behaviors here.
    'a[rel~="nsfw"]' : function(element) {
        element.onclick = function() {
            alert("This link is marked as non-worksafe. Please disable
Greasemonkey to proceed.");
            return false;
        }
    }
}

///////////////////////////////////////////////////////////////////////
// Functions
///////////////////////////////////////////////////////////////////////

/**
 * includeScript(uri)
 **
 * Modifies the DOM of the current page to include an external script.
 **
 * Preconditions:
 * - uri is a String that contains a valid URI which dereferences to a
resource of
 *   one of the following MIME types:
 *   - text/javascript
 *   - text/ecmascript
 *   - application/x-javascript
 * Postconditions:
 * - The DOM of the current pagbe is modified to include a <script>
element in the document's <head>.
 */
function includeScript(uri) {
    var eleHead, eleScript;

    // Find the head.
    eleHead = document.documentElement.getElementsByTagName("head")[0];

    // Create the new element.
    eleScript = document.createElement("script");
    eleScript.setAttribute("src", uri);

    // Apply the new element.
    eleHead.appendChild(eleScript);
}

///////////////////////////////////////////////////////////////////////
// Imperative Section
///////////////////////////////////////////////////////////////////////

includeScript(behaviorsURI);
Behaviour.register(myrules);
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