Greasemonkey User Script: add "first page" and "last page" links to hex.pm package listing.

hex_pm_pages.user.js

// ==UserScript==
// @name         hex_pm_pages
// @namespace    http://orderthruchaos.bitbucket.org/
// @copyright    2015+, Brett DiFrischia
// @license      
// @description  
// @grant        GM_log
// @require      https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js
// @include      https://hex.pm/packages
// @include      https://hex.pm/packages?*
// ==/UserScript==
// @grant        
// @require      https://gist.github.com/raw/2625891/waitForKeyElements.js
// @require      https://ajax.googleapis.com/ajax/libs/angularjs/1.2.25/angular.min.js
// @require      https://ajax.googleapis.com/ajax/libs/threejs/r67/three.min.js
// @require      https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js
// @require      https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.3/jquery.mobile.min.js
// @resource     https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.3/jquery.mobile.min.css


// See the following for more Google-hosted libraries:
//  https://developers.google.com/speed/libraries/


this.$J = this.jQuery = jQuery.noConflict(true);
// var $J = jQuery.noConflict();


(
  function () {
    var item_count_selector = 'p.pagination.pull-left';
    var page_links_selector = 'ul.pagination.pull-right';
    var left_chevron  = '«';
    var right_chevron = '»';

    var is_chevron = function(s) { return s == '»'; };

    var trim = function (s) {
      return s.replace(/^\s*/m, '').replace(/\s*$/m, '');
    };

    var get_prev_list_item = function () {
      return $J('ul.pagination.pull-right li').first();
    };

    var get_next_list_item = function () {
      return $J('ul.pagination.pull-right li').last();
    };

    var get_base_text = function() {
      var txt = $J(item_count_selector).text();
      return txt.replace(/^[^0-9]*/m, '').replace(/[^0-9]*$/m, '');
    };

    var get_item1 = function() {
      return parseInt( get_base_text().replace(/-.*/, '') );
    };

    var get_item2 = function() {
      return parseInt(
        get_base_text().replace(/^\d+./, '').replace(/ .*/, '')
      );
    };

    var get_count = function () {
      return parseInt( get_base_text().replace(/.*\s/, '') );
    };

    var this_is_last_page = function () {
      var el = $J('ul.pagination.pull-right li.disabled span');

      if (el.length > 0 && is_chevron(el.text())) return true;
      else return false;
    };

    var prev_page_number = function () {
      return parseInt($J('ul.pagination.pull-right li a').last().text());
    };

    var curr_page_number = function () {
      return parseInt($J('ul.pagination.pull-right li.active span').text());
    };

    var get_ppp = function () {
      var it1 = get_item1();
      if (this_is_last_page()) {
        it1 = it1 - 1;
        return it1 / prev_page_number();
      } else {
        var it2 = get_item2();
        return ppp = it2 - it1 + 1;
      }
    };

    var get_page_count = function(it1, it2, cnt) {
      if (this_is_last_page()) {
        return curr_page_number();
      } else {
        var cnt = get_count();
        var ppp = get_ppp();
        return Math.ceil(cnt / ppp);
      }
    };


    var add_frst_link = function () {
      var prev_link = get_prev_list_item();
      var prev_text = prev_link.text();
      var frst_link = prev_link.clone();
      frst_link.children().first().text(prev_text + prev_text);

      if (frst_link.children('a').length > 0) {
        var href = frst_link.children('a').attr('href').replace(/\d+$/, '1');
        frst_link.children('a').attr('href', href);
      }

      prev_link.before(frst_link);
    };


    var add_last_link = function () {
      var next_link = get_next_list_item();
      var next_text = next_link.text();
      var last_link = next_link.clone();
      last_link.children().first().text(next_text + next_text);

      if (last_link.children('a').length > 0) {
        var cnt  = "" + get_page_count();
        var href = last_link.children('a').attr('href').replace(/\d+$/, cnt);
        last_link.children('a').attr('href', href);
      }

      next_link.after(last_link);
    };


    // var on_load = function() { add_frst_link(); add_last_link(); };


    $J(function() { add_frst_link(); add_last_link(); });
  }
)();


// vim: sts=2 sw=2 ts=8 et