// ==UserScript==
// @name        Widen Code Container and Hide Whitespace (GitHub)
// @namespace   chriskim06
// @description Adds buttons to allow you to widen the container when viewing files and hide whitespace when viewing pull request diffs
// @include     https://github.com/*
// @require     http://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js
// @version     1.2.9
// @grant       none
// @locale      en
// @downloadURL none
// ==/UserScript==

this.$ = this.jQuery = jQuery.noConflict(true);

$(function() {
    
  if ($('#user-links').length) {
    
    // Add buttons in the header navbar
    $('#user-links').prepend('<li class="header-nav-item"><a href="javascript:void(0)" id="hide-whitespace-button" class="header-nav-link tooltipped tooltipped-s" aria-label="Hide whitespace" onclick="return false;"><span class="octicon octicon-circle-slash"></span></a></li>');
    $('#user-links').prepend('<li class="header-nav-item"><a href="javascript:void(0)" id="code-widen-button" class="header-nav-link tooltipped tooltipped-s" aria-label="Widen code container" onclick="return false;"><span class="octicon octicon-mirror "></span></a></li>');
    
    // Toggle code container width on click
    $('#code-widen-button').click(function(e) {
      e.preventDefault();
      if ($('#files').length || $('.repository-content').find('.file').length) {
        if ($('#toc').find('.btn-group > a:nth-child(2)').hasClass('selected')) {
          return;
        }
        var container = $('.container.new-discussion-timeline.experiment-repo-nav');
        var expanded = $(window).width() * 0.9;
        if (container.width() < expanded) {
          container.css('width', expanded + 'px');
        } else {
          container.css('width', '980px');
        }
      }
      $(this).blur();
    });
    
    // Toggle page with ?w=1 appended to the url to show/hide whitespace
    $('#hide-whitespace-button').click(function(e) {
      e.preventDefault();
      var url = window.location.href;
      if ($('#files').length) {
        if (url.endsWith('?w=1')) {
          window.location.href = url.slice(0, -4);
        } else {
          window.location.href = url + '?w=1';
        }
      }
      $(this).blur();
    });
    
    // Reset container width on pull request pages if you leave the diff tab
    if ($('.tabnav-tab.js-pull-request-tab:last').hasClass('selected')) {
      $('.tabnav-tab.js-pull-request-tab:not(:last)').each(function() {
        $(this).click(function(e) {
          var container = $('.container.new-discussion-timeline.experiment-repo-nav');
          var expanded = $(window).width() * 0.9;
          if (container.width() >= expanded) {
            container.css('width', '980px');
          }
        });
      });
    }
  }
  
});