IITC plugin: Browsed portals history [https://gist.github.com/johnd0e/a06ea19aefa6cbf35651eca9bee470a3/raw/browsed-portals-history.user.js]

browsed-portals-history.user.js

// ==UserScript==
// @author         jd
// @name           IITC plugin: Browsed portals history
// @category       Misc
// @version        0.1
// @description    Pushes browsed portals into browser's history, and allows navigate between them with back/forward buttons.
// @namespace      https://gist.github.com/johnd0e
// @homepageURL    https://gist.github.com/johnd0e/a06ea19aefa6cbf35651eca9bee470a3
// @supportURL     https://gist.github.com/johnd0e/a06ea19aefa6cbf35651eca9bee470a3#new_comment_field
// @downloadURL    https://gist.github.com/johnd0e/a06ea19aefa6cbf35651eca9bee470a3/raw/custom-linked-portals-show.user.js
// @id             browsed-portals-history
// @match          https://intel.ingress.com/*
// @grant          none
// ==/UserScript==

function wrapper(plugin_info) {
// ensure plugin framework is there, even if iitc is not yet loaded
if(typeof window.plugin !== 'function') window.plugin = function() {};


var skipHook;
window.addEventListener('popstate', function (event) {
  skipHook = true;
  var ll = getURLParam('pll');
  if (ll) {
    var position = L.latLng(ll.split(','));
    selectPortalByLatLng(position);
    if (!map.getBounds().contains(position)) {
      map.panInside(position);
    }
  } else {
    renderPortalDetails(null);
  }
  skipHook = false;
});

function setup () {
  addHook('portalSelected', function (data) {
    if (skipHook || data.selectedPortalGuid === data.unselectedPortalGuid) { return; }
    if (data.selectedPortalGuid) {
      var portal = portals[data.selectedPortalGuid];
      history.pushState(data.selectedPortalGuid, '', makePermalink(portal.getLatLng()));
    } else {
      history.pushState(null, '', '/');
    }
  });

  if (typeof android === 'undefined') {
    return;
  }
  $('<style>').prop('type', 'text/css').html('.iitc-history-nav { font-size: 20px }').appendTo('head');
  var HistoryNav = L.Control.extend({
    options: {
      position: 'topleft'
    },

    onAdd: function (map) {
      var button = document.createElement('a');
      button.text = '⬅';
      button.className = 'leaflet-bar-part iitc-history-nav';
      button.addEventListener('click', function (ev) {
        if (selectedPortal) {
          var position = portals[selectedPortal].getLatLng();
          if (!map.getBounds().contains(position)) {
            map.panInside(position, { padding: [15, 15]});
            return;
          }
        }
        history.back();
      }, false);
      button.addEventListener('contextmenu', function (ev) {
        ev.preventDefault();
        history.forward(history);
      }, false);
      button.title = 'Long tap [contextmenu] for Forward';

      var container = document.createElement('div');
      container.className = 'leaflet-bar';
      container.appendChild(button);
      return container;
    },
  });
  var ctrl = new HistoryNav;
  ctrl.addTo(window.map);
}

var initial = Math.random();
history.replaceState(initial, '');
history.pushState(null, '');
window.addEventListener('popstate', function (event)  {
  if (event.state === initial) {
    if (typeof android === 'undefined' && confirm('Do you really want to leave?')) {
      history.back();
    } else {
      history.forward();
    }
  }
});

setup.info = plugin_info; //add the script info data to the function as a property
if(!window.bootPlugins) window.bootPlugins = [];
window.bootPlugins.push(setup);
// if IITC has already booted, immediately run the 'setup' function
if(window.iitcLoaded && typeof setup === 'function') setup();
} // wrapper end
// inject code into site context
var script = document.createElement('script');
var info = {};
if (typeof GM_info !== 'undefined' && GM_info && GM_info.script) info.script = { version: GM_info.script.version, name: GM_info.script.name, description: GM_info.script.description };
script.appendChild(document.createTextNode('('+ wrapper +')('+JSON.stringify(info)+');'));
(document.body || document.head || document.documentElement).appendChild(script);