/*

 * websupport.js

 * ~~~~~~~~~~~~~

 *

 * sphinx.websupport utilties for all documentation.

 *

 * :copyright: Copyright 2007-2013 by the Sphinx team, see AUTHORS.

 * :license: BSD, see LICENSE for details.

 *

 */

(function($) {

  $.fn.autogrow = function() {

    return this.each(function() {

    var textarea = this;

    $.fn.autogrow.resize(textarea);

    $(textarea)

      .focus(function() {

        textarea.interval = setInterval(function() {

          $.fn.autogrow.resize(textarea);

        }, 500);

      })

      .blur(function() {

        clearInterval(textarea.interval);

      });

    });

  };

  $.fn.autogrow.resize = function(textarea) {

    var lineHeight = parseInt($(textarea).css('line-height'), 10);

    var lines = textarea.value.split('\n');

    var columns = textarea.cols;

    var lineCount = 0;

    $.each(lines, function() {

      lineCount += Math.ceil(this.length / columns) || 1;

    });

    var height = lineHeight * (lineCount + 1);

    $(textarea).css('height', height);

  };

})(jQuery);

(function($) {

  var comp, by;

  function init() {

    initEvents();

    initComparator();

  }

  function initEvents() {

    $('a.comment-close').live("click", function(event) {

      event.preventDefault();

      hide($(this).attr('id').substring(2));

    });

    $('a.vote').live("click", function(event) {

      event.preventDefault();

      handleVote($(this));

    });

    $('a.reply').live("click", function(event) {

      event.preventDefault();

      openReply($(this).attr('id').substring(2));

    });

    $('a.close-reply').live("click", function(event) {

      event.preventDefault();

      closeReply($(this).attr('id').substring(2));

    });

    $('a.sort-option').live("click", function(event) {

      event.preventDefault();

      handleReSort($(this));

    });

    $('a.show-proposal').live("click", function(event) {

      event.preventDefault();

      showProposal($(this).attr('id').substring(2));

    });

    $('a.hide-proposal').live("click", function(event) {

      event.preventDefault();

      hideProposal($(this).attr('id').substring(2));

    });

    $('a.show-propose-change').live("click", function(event) {

      event.preventDefault();

      showProposeChange($(this).attr('id').substring(2));

    });

    $('a.hide-propose-change').live("click", function(event) {

      event.preventDefault();

      hideProposeChange($(this).attr('id').substring(2));

    });

    $('a.accept-comment').live("click", function(event) {

      event.preventDefault();

      acceptComment($(this).attr('id').substring(2));

    });

    $('a.delete-comment').live("click", function(event) {

      event.preventDefault();

      deleteComment($(this).attr('id').substring(2));

    });

    $('a.comment-markup').live("click", function(event) {

      event.preventDefault();

      toggleCommentMarkupBox($(this).attr('id').substring(2));

    });

  }

  /**

   * Set comp, which is a comparator function used for sorting and

   * inserting comments into the list.

   */

  function setComparator() {

    // If the first three letters are "asc", sort in ascending order

    // and remove the prefix.

    if (by.substring(0,3) == 'asc') {

      var i = by.substring(3);

      comp = function(a, b) { return a[i] - b[i]; };

    } else {

      // Otherwise sort in descending order.

      comp = function(a, b) { return b[by] - a[by]; };

    }

    // Reset link styles and format the selected sort option.

    $('a.sel').attr('href', '#').removeClass('sel');

    $('a.by' + by).removeAttr('href').addClass('sel');

  }

  /**

   * Create a comp function. If the user has preferences stored in

   * the sortBy cookie, use those, otherwise use the default.

   */

  function initComparator() {

    by = 'rating'; // Default to sort by rating.

    // If the sortBy cookie is set, use that instead.

    if (document.cookie.length > 0) {

      var start = document.cookie.indexOf('sortBy=');

      if (start != -1) {

        start = start + 7;

        var end = document.cookie.indexOf(";", start);

        if (end == -1) {

          end = document.cookie.length;

          by = unescape(document.cookie.substring(start, end));

        }

      }

    }

    setComparator();

  }

  /**

   * Show a comment div.

   */

  function show(id) {

    $('#ao' + id).hide();

    $('#ah' + id).show();

    var context = $.extend({id: id}, opts);

    var popup = $(renderTemplate(popupTemplate, context)).hide();

    popup.find('textarea[name="proposal"]').hide();

    popup.find('a.by' + by).addClass('sel');

    var form = popup.find('#cf' + id);

    form.submit(function(event) {

      event.preventDefault();

      addComment(form);

    });

    $('#s' + id).after(popup);

    popup.slideDown('fast', function() {

      getComments(id);

    });

  }

  /**

   * Hide a comment div.

   */

  function hide(id) {

    $('#ah' + id).hide();

    $('#ao' + id).show();

    var div = $('#sc' + id);

    div.slideUp('fast', function() {

      div.remove();

    });

  }

  /**

   * Perform an ajax request to get comments for a node

   * and insert the comments into the comments tree.

   */

  function getComments(id) {

    $.ajax({

     type: 'GET',

     url: opts.getCommentsURL,

     data: {node: id},

     success: function(data, textStatus, request) {

       var ul = $('#cl' + id);

       var speed = 100;

       $('#cf' + id)

         .find('textarea[name="proposal"]')

         .data('source', data.source);

       if (data.comments.length === 0) {

         ul.html('<li>No comments yet.</li>');

         ul.data('empty', true);

       } else {

         // If there are comments, sort them and put them in the list.

         var comments = sortComments(data.comments);

         speed = data.comments.length * 100;

         appendComments(comments, ul);

         ul.data('empty', false);

       }

       $('#cn' + id).slideUp(speed + 200);

       ul.slideDown(speed);

     },

     error: function(request, textStatus, error) {

       showError('Oops, there was a problem retrieving the comments.');

     },

     dataType: 'json'

    });

  }

  /**

   * Add a comment via ajax and insert the comment into the comment tree.

   */

  function addComment(form) {

    var node_id = form.find('input[name="node"]').val();

    var parent_id = form.find('input[name="parent"]').val();

    var text = form.find('textarea[name="comment"]').val();

    var proposal = form.find('textarea[name="proposal"]').val();

    if (text == '') {

      showError('Please enter a comment.');

      return;

    }

    // Disable the form that is being submitted.

    form.find('textarea,input').attr('disabled', 'disabled');

    // Send the comment to the server.

    $.ajax({

      type: "POST",

      url: opts.addCommentURL,

      dataType: 'json',

      data: {

        node: node_id,

        parent: parent_id,

        text: text,

        proposal: proposal

      },

      success: function(data, textStatus, error) {

        // Reset the form.

        if (node_id) {

          hideProposeChange(node_id);

        }

        form.find('textarea')

          .val('')

          .add(form.find('input'))

          .removeAttr('disabled');

	var ul = $('#cl' + (node_id || parent_id));

        if (ul.data('empty')) {

          $(ul).empty();

          ul.data('empty', false);

        }

        insertComment(data.comment);

        var ao = $('#ao' + node_id);

        ao.find('img').attr({'src': opts.commentBrightImage});

        if (node_id) {

          // if this was a "root" comment, remove the commenting box

          // (the user can get it back by reopening the comment popup)

          $('#ca' + node_id).slideUp();

        }

      },

      error: function(request, textStatus, error) {

        form.find('textarea,input').removeAttr('disabled');

        showError('Oops, there was a problem adding the comment.');

      }

    });

  }

  /**

   * Recursively append comments to the main comment list and children

   * lists, creating the comment tree.

   */

  function appendComments(comments, ul) {

    $.each(comments, function() {

      var div = createCommentDiv(this);

      ul.append($(document.createElement('li')).html(div));

      appendComments(this.children, div.find('ul.comment-children'));

      // To avoid stagnating data, don't store the comments children in data.

      this.children = null;

      div.data('comment', this);

    });

  }

  /**

   * After adding a new comment, it must be inserted in the correct

   * location in the comment tree.

   */

  function insertComment(comment) {

    var div = createCommentDiv(comment);

    // To avoid stagnating data, don't store the comments children in data.

    comment.children = null;

    div.data('comment', comment);

    var ul = $('#cl' + (comment.node || comment.parent));

    var siblings = getChildren(ul);

    var li = $(document.createElement('li'));

    li.hide();

    // Determine where in the parents children list to insert this comment.

    for(i=0; i < siblings.length; i++) {

      if (comp(comment, siblings[i]) <= 0) {

        $('#cd' + siblings[i].id)

          .parent()

          .before(li.html(div));

        li.slideDown('fast');

        return;

      }

    }

    // If we get here, this comment rates lower than all the others,

    // or it is the only comment in the list.

    ul.append(li.html(div));

    li.slideDown('fast');

  }

  function acceptComment(id) {

    $.ajax({

      type: 'POST',

      url: opts.acceptCommentURL,

      data: {id: id},

      success: function(data, textStatus, request) {

        $('#cm' + id).fadeOut('fast');

        $('#cd' + id).removeClass('moderate');

      },

      error: function(request, textStatus, error) {

        showError('Oops, there was a problem accepting the comment.');

      }

    });

  }

  function deleteComment(id) {

    $.ajax({

      type: 'POST',

      url: opts.deleteCommentURL,

      data: {id: id},

      success: function(data, textStatus, request) {

        var div = $('#cd' + id);

        if (data == 'delete') {

          // Moderator mode: remove the comment and all children immediately

          div.slideUp('fast', function() {

            div.remove();

          });

          return;

        }

        // User mode: only mark the comment as deleted

        div

          .find('span.user-id:first')

          .text('[deleted]').end()

          .find('div.comment-text:first')

          .text('[deleted]').end()

          .find('#cm' + id + ', #dc' + id + ', #ac' + id + ', #rc' + id +

                ', #sp' + id + ', #hp' + id + ', #cr' + id + ', #rl' + id)

          .remove();

        var comment = div.data('comment');

        comment.username = '[deleted]';

        comment.text = '[deleted]';

        div.data('comment', comment);

      },

      error: function(request, textStatus, error) {

        showError('Oops, there was a problem deleting the comment.');

      }

    });

  }

  function showProposal(id) {

    $('#sp' + id).hide();

    $('#hp' + id).show();

    $('#pr' + id).slideDown('fast');

  }

  function hideProposal(id) {

    $('#hp' + id).hide();

    $('#sp' + id).show();

    $('#pr' + id).slideUp('fast');

  }

  function showProposeChange(id) {

    $('#pc' + id).hide();

    $('#hc' + id).show();

    var textarea = $('#pt' + id);

    textarea.val(textarea.data('source'));

    $.fn.autogrow.resize(textarea[0]);

    textarea.slideDown('fast');

  }

  function hideProposeChange(id) {

    $('#hc' + id).hide();

    $('#pc' + id).show();

    var textarea = $('#pt' + id);

    textarea.val('').removeAttr('disabled');

    textarea.slideUp('fast');

  }

  function toggleCommentMarkupBox(id) {

    $('#mb' + id).toggle();

  }

  /** Handle when the user clicks on a sort by link. */

  function handleReSort(link) {

    var classes = link.attr('class').split(/\s+/);

    for (var i=0; i<classes.length; i++) {

      if (classes[i] != 'sort-option') {

	by = classes[i].substring(2);

      }

    }

    setComparator();

    // Save/update the sortBy cookie.

    var expiration = new Date();

    expiration.setDate(expiration.getDate() + 365);

    document.cookie= 'sortBy=' + escape(by) +

                     ';expires=' + expiration.toUTCString();

    $('ul.comment-ul').each(function(index, ul) {

      var comments = getChildren($(ul), true);

      comments = sortComments(comments);

      appendComments(comments, $(ul).empty());

    });

  }

  /**

   * Function to process a vote when a user clicks an arrow.

   */

  function handleVote(link) {

    if (!opts.voting) {

      showError("You'll need to login to vote.");

      return;

    }

    var id = link.attr('id');

    if (!id) {

      // Didn't click on one of the voting arrows.

      return;

    }

    // If it is an unvote, the new vote value is 0,

    // Otherwise it's 1 for an upvote, or -1 for a downvote.

    var value = 0;

    if (id.charAt(1) != 'u') {

      value = id.charAt(0) == 'u' ? 1 : -1;

    }

    // The data to be sent to the server.

    var d = {

      comment_id: id.substring(2),

      value: value

    };

    // Swap the vote and unvote links.

    link.hide();

    $('#' + id.charAt(0) + (id.charAt(1) == 'u' ? 'v' : 'u') + d.comment_id)

      .show();

    // The div the comment is displayed in.

    var div = $('div#cd' + d.comment_id);

    var data = div.data('comment');

    // If this is not an unvote, and the other vote arrow has

    // already been pressed, unpress it.

    if ((d.value !== 0) && (data.vote === d.value * -1)) {

      $('#' + (d.value == 1 ? 'd' : 'u') + 'u' + d.comment_id).hide();

      $('#' + (d.value == 1 ? 'd' : 'u') + 'v' + d.comment_id).show();

    }

    // Update the comments rating in the local data.

    data.rating += (data.vote === 0) ? d.value : (d.value - data.vote);

    data.vote = d.value;

    div.data('comment', data);

    // Change the rating text.

    div.find('.rating:first')

      .text(data.rating + ' point' + (data.rating == 1 ? '' : 's'));

    // Send the vote information to the server.

    $.ajax({

      type: "POST",

      url: opts.processVoteURL,

      data: d,

      error: function(request, textStatus, error) {

        showError('Oops, there was a problem casting that vote.');

      }

    });

  }

  /**

   * Open a reply form used to reply to an existing comment.

   */

  function openReply(id) {

    // Swap out the reply link for the hide link

    $('#rl' + id).hide();

    $('#cr' + id).show();

    // Add the reply li to the children ul.

    var div = $(renderTemplate(replyTemplate, {id: id})).hide();

    $('#cl' + id)

      .prepend(div)

      // Setup the submit handler for the reply form.

      .find('#rf' + id)

      .submit(function(event) {

        event.preventDefault();

        addComment($('#rf' + id));

        closeReply(id);

      })

      .find('input[type=button]')

      .click(function() {

        closeReply(id);

      });

    div.slideDown('fast', function() {

      $('#rf' + id).find('textarea').focus();

    });

  }

  /**

   * Close the reply form opened with openReply.

   */

  function closeReply(id) {

    // Remove the reply div from the DOM.

    $('#rd' + id).slideUp('fast', function() {

      $(this).remove();

    });

    // Swap out the hide link for the reply link

    $('#cr' + id).hide();

    $('#rl' + id).show();

  }

  /**

   * Recursively sort a tree of comments using the comp comparator.

   */

  function sortComments(comments) {

    comments.sort(comp);

    $.each(comments, function() {

      this.children = sortComments(this.children);

    });

    return comments;

  }

  /**

   * Get the children comments from a ul. If recursive is true,

   * recursively include childrens' children.

   */

  function getChildren(ul, recursive) {

    var children = [];

    ul.children().children("[id^='cd']")

      .each(function() {

        var comment = $(this).data('comment');

        if (recursive)

          comment.children = getChildren($(this).find('#cl' + comment.id), true);

        children.push(comment);

      });

    return children;

  }

  /** Create a div to display a comment in. */

  function createCommentDiv(comment) {

    if (!comment.displayed && !opts.moderator) {

      return $('<div class="moderate">Thank you!  Your comment will show up '

               + 'once it is has been approved by a moderator.</div>');

    }

    // Prettify the comment rating.

    comment.pretty_rating = comment.rating + ' point' +

      (comment.rating == 1 ? '' : 's');

    // Make a class (for displaying not yet moderated comments differently)

    comment.css_class = comment.displayed ? '' : ' moderate';

    // Create a div for this comment.

    var context = $.extend({}, opts, comment);

    var div = $(renderTemplate(commentTemplate, context));

    // If the user has voted on this comment, highlight the correct arrow.

    if (comment.vote) {

      var direction = (comment.vote == 1) ? 'u' : 'd';

      div.find('#' + direction + 'v' + comment.id).hide();

      div.find('#' + direction + 'u' + comment.id).show();

    }

    if (opts.moderator || comment.text != '[deleted]') {

      div.find('a.reply').show();

      if (comment.proposal_diff)

        div.find('#sp' + comment.id).show();

      if (opts.moderator && !comment.displayed)

        div.find('#cm' + comment.id).show();

      if (opts.moderator || (opts.username == comment.username))

        div.find('#dc' + comment.id).show();

    }

    return div;

  }

  /**

   * A simple template renderer. Placeholders such as <%id%> are replaced

   * by context['id'] with items being escaped. Placeholders such as <#id#>

   * are not escaped.

   */

  function renderTemplate(template, context) {

    var esc = $(document.createElement('div'));

    function handle(ph, escape) {

      var cur = context;

      $.each(ph.split('.'), function() {

        cur = cur[this];

      });

      return escape ? esc.text(cur || "").html() : cur;

    }

    return template.replace(/<([%#])([\w\.]*)\1>/g, function() {

      return handle(arguments[2], arguments[1] == '%' ? true : false);

    });

  }

  /** Flash an error message briefly. */

  function showError(message) {

    $(document.createElement('div')).attr({'class': 'popup-error'})

      .append($(document.createElement('div'))

               .attr({'class': 'error-message'}).text(message))

      .appendTo('body')

      .fadeIn("slow")

      .delay(2000)

      .fadeOut("slow");

  }

  /** Add a link the user uses to open the comments popup. */

  $.fn.comment = function() {

    return this.each(function() {

      var id = $(this).attr('id').substring(1);

      var count = COMMENT_METADATA[id];

      var title = count + ' comment' + (count == 1 ? '' : 's');

      var image = count > 0 ? opts.commentBrightImage : opts.commentImage;

      var addcls = count == 0 ? ' nocomment' : '';

      $(this)

        .append(

          $(document.createElement('a')).attr({

            href: '#',

            'class': 'sphinx-comment-open' + addcls,

            id: 'ao' + id

          })

            .append($(document.createElement('img')).attr({

              src: image,

              alt: 'comment',

              title: title

            }))

            .click(function(event) {

              event.preventDefault();

              show($(this).attr('id').substring(2));

            })

        )

        .append(

          $(document.createElement('a')).attr({

            href: '#',

            'class': 'sphinx-comment-close hidden',

            id: 'ah' + id

          })

            .append($(document.createElement('img')).attr({

              src: opts.closeCommentImage,

              alt: 'close',

              title: 'close'

            }))

            .click(function(event) {

              event.preventDefault();

              hide($(this).attr('id').substring(2));

            })

        );

    });

  };

  var opts = {

    processVoteURL: '/_process_vote',

    addCommentURL: '/_add_comment',

    getCommentsURL: '/_get_comments',

    acceptCommentURL: '/_accept_comment',

    deleteCommentURL: '/_delete_comment',

    commentImage: '/static/_static/comment.png',

    closeCommentImage: '/static/_static/comment-close.png',

    loadingImage: '/static/_static/ajax-loader.gif',

    commentBrightImage: '/static/_static/comment-bright.png',

    upArrow: '/static/_static/up.png',

    downArrow: '/static/_static/down.png',

    upArrowPressed: '/static/_static/up-pressed.png',

    downArrowPressed: '/static/_static/down-pressed.png',

    voting: false,

    moderator: false

  };

  if (typeof COMMENT_OPTIONS != "undefined") {

    opts = jQuery.extend(opts, COMMENT_OPTIONS);

  }

  var popupTemplate = '\

    <div class="sphinx-comments" id="sc<%id%>">\

      <p class="sort-options">\

        Sort by:\

        <a href="#" class="sort-option byrating">best rated</a>\

        <a href="#" class="sort-option byascage">newest</a>\

        <a href="#" class="sort-option byage">oldest</a>\

      </p>\

      <div class="comment-header">Comments</div>\

      <div class="comment-loading" id="cn<%id%>">\

        loading comments... <img src="<%loadingImage%>" alt="" /></div>\

      <ul id="cl<%id%>" class="comment-ul"></ul>\

      <div id="ca<%id%>">\

      <p class="add-a-comment">Add a comment\

        (<a href="#" class="comment-markup" id="ab<%id%>">markup</a>):</p>\

      <div class="comment-markup-box" id="mb<%id%>">\

        reStructured text markup: <i>*emph*</i>, <b>**strong**</b>, \

        <tt>``code``</tt>, \

        code blocks: <tt>::</tt> and an indented block after blank line</div>\

      <form method="post" id="cf<%id%>" class="comment-form" action="">\

        <textarea name="comment" cols="80"></textarea>\

        <p class="propose-button">\

          <a href="#" id="pc<%id%>" class="show-propose-change">\

            Propose a change ▹\

          </a>\

          <a href="#" id="hc<%id%>" class="hide-propose-change">\

            Propose a change ▿\

          </a>\

        </p>\

        <textarea name="proposal" id="pt<%id%>" cols="80"\

                  spellcheck="false"></textarea>\

        <input type="submit" value="Add comment" />\

        <input type="hidden" name="node" value="<%id%>" />\

        <input type="hidden" name="parent" value="" />\

      </form>\

      </div>\

    </div>';

  var commentTemplate = '\

    <div id="cd<%id%>" class="sphinx-comment<%css_class%>">\

      <div class="vote">\

        <div class="arrow">\

          <a href="#" id="uv<%id%>" class="vote" title="vote up">\

            <img src="<%upArrow%>" />\

          </a>\

          <a href="#" id="uu<%id%>" class="un vote" title="vote up">\

            <img src="<%upArrowPressed%>" />\

          </a>\

        </div>\

        <div class="arrow">\

          <a href="#" id="dv<%id%>" class="vote" title="vote down">\

            <img src="<%downArrow%>" id="da<%id%>" />\

          </a>\

          <a href="#" id="du<%id%>" class="un vote" title="vote down">\

            <img src="<%downArrowPressed%>" />\

          </a>\

        </div>\

      </div>\

      <div class="comment-content">\

        <p class="tagline comment">\

          <span class="user-id"><%username%></span>\

          <span class="rating"><%pretty_rating%></span>\

          <span class="delta"><%time.delta%></span>\

        </p>\

        <div class="comment-text comment"><#text#></div>\

        <p class="comment-opts comment">\

          <a href="#" class="reply hidden" id="rl<%id%>">reply &#9657;</a>\

          <a href="#" class="close-reply" id="cr<%id%>">reply &#9663;</a>\

          <a href="#" id="sp<%id%>" class="show-proposal">proposal &#9657;</a>\

          <a href="#" id="hp<%id%>" class="hide-proposal">proposal &#9663;</a>\

          <a href="#" id="dc<%id%>" class="delete-comment hidden">delete</a>\

          <span id="cm<%id%>" class="moderation hidden">\

            <a href="#" id="ac<%id%>" class="accept-comment">accept</a>\

          </span>\

        </p>\

        <pre class="proposal" id="pr<%id%>">\

<#proposal_diff#>\

        </pre>\

          <ul class="comment-children" id="cl<%id%>"></ul>\

        </div>\

        <div class="clearleft"></div>\

      </div>\

    </div>';

  var replyTemplate = '\

    <li>\

      <div class="reply-div" id="rd<%id%>">\

        <form id="rf<%id%>">\

          <textarea name="comment" cols="80"></textarea>\

          <input type="submit" value="Add reply" />\

          <input type="button" value="Cancel" />\

          <input type="hidden" name="parent" value="<%id%>" />\

          <input type="hidden" name="node" value="" />\

        </form>\

      </div>\

    </li>';

  $(document).ready(function() {

    init();

  });

})(jQuery);

$(document).ready(function() {

  // add comment anchors for all paragraphs that are commentable

  $('.sphinx-has-comment').comment();

  // highlight search words in search results

  $("div.context").each(function() {

    var params = $.getQueryParameters();

    var terms = (params.q) ? params.q[0].split(/\s+/) : [];

    var result = $(this);

    $.each(terms, function() {

      result.highlightText(this.toLowerCase(), 'highlighted');

    });

  });

  // directly open comment window if requested

  var anchor = document.location.hash;

  if (anchor.substring(0, 9) == '#comment-') {

    $('#ao' + anchor.substring(9)).click();

    document.location.hash = '#s' + anchor.substring(9);

  }

});