avail_revs = set() # drop revs[0]

                    c.update_msg = _('No changesets found for updating this pull request.')

                # TODO: handle branch heads that not are tip-most

                brevs = org_scm_instance._repo.revs('%s - %ld - %s', c.cs_branch_name, avail_revs, revs[0])

                if brevs:

                    # also show changesets that are on branch but neither ancestors nor descendants

                    show.update(org_scm_instance._repo.revs('::%ld - ::%ld - ::%s', brevs, avail_revs, c.a_branch_name))

                    show.add(revs[0]) # make sure graph shows this so we can see how they relate

                    c.update_msg_other = _('Note: Branch %s has another head: %s.') % (c.cs_branch_name,

                        h.short_id(org_scm_instance.get_changeset((max(brevs))).raw_id))

                avail_show = sorted(show, reverse=True)

        elif org_scm_instance.alias == 'git':

            c.update_msg = _("Git pull requests don't support updates yet.")

        c.avail_revs = avail_revs

        c.avail_cs = [org_scm_instance.get_changeset(r) for r in avail_show]

        c.avail_jsdata = json.dumps(graph_data(org_scm_instance, avail_show))

        raw_ids = [x.raw_id for x in c.cs_ranges]

        c.cs_comments = c.cs_repo.get_comments(raw_ids)

        c.statuses = c.cs_repo.statuses(raw_ids)

        ignore_whitespace = request.GET.get('ignorews') == '1'

        line_context = request.GET.get('context', 3)

        c.ignorews_url = _ignorews_url

        c.context_url = _context_url

        c.fulldiff = request.GET.get('fulldiff')

        diff_limit = self.cut_off_limit if not c.fulldiff else None

        # we swap org/other ref since we run a simple diff on one repo

        log.debug('running diff between %s and %s in %s',

                  c.a_rev, c.cs_rev, org_scm_instance.path)

        txtdiff = org_scm_instance.get_diff(rev1=safe_str(c.a_rev), rev2=safe_str(c.cs_rev),

                                      ignore_whitespace=ignore_whitespace,

                                      context=line_context)

        diff_processor = diffs.DiffProcessor(txtdiff or '', format='gitdiff',

                                             diff_limit=diff_limit)

        _parsed = diff_processor.prepare()

        c.limited_diff = False

        if isinstance(_parsed, LimitedDiffContainer):

            c.limited_diff = True

        c.files = []

        c.changes = {}

        c.lines_added = 0

        c.lines_deleted = 0

        for f in _parsed:

            st = f['stats']

            c.lines_added += st['added']

            c.lines_deleted += st['deleted']

            fid = h.FID('', f['filename'])

            c.files.append([fid, f['operation'], f['filename'], f['stats']])

            htmldiff = diff_processor.as_html(enable_comments=True,

                                              parsed_lines=[f])

            c.changes[fid] = [f['operation'], f['filename'], htmldiff]

        # inline comments

        c.inline_cnt = 0

        c.inline_comments = cc_model.get_inline_comments(

                                c.db_repo.repo_id,

                                pull_request=pull_request_id)

        # count inline comments

        for __, lines in c.inline_comments:

            for comments in lines.values():

                c.inline_cnt += len(comments)

        # comments

        c.comments = cc_model.get_comments(c.db_repo.repo_id,

                                           pull_request=pull_request_id)

        # (badly named) pull-request status calculation based on reviewer votes

        (c.pull_request_reviewers,

         c.pull_request_pending_reviewers,

         c.current_voting_result,

         ) = cs_model.calculate_pull_request_result(c.pull_request)

        c.changeset_statuses = ChangesetStatus.STATUSES

        c.as_form = False

        c.ancestor = None # there is one - but right here we don't know which

        return render('/pullrequests/pullrequest_show.html')

    @LoginRequired()

    @NotAnonymous()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    @jsonify

    def comment(self, repo_name, pull_request_id):

        pull_request = PullRequest.get_or_404(pull_request_id)

        status = request.POST.get('changeset_status')

        close_pr = request.POST.get('save_close')

        f_path = request.POST.get('f_path')

        line_no = request.POST.get('line')

            # status votes and closing is only possible in general comments

            raise HTTPBadRequest()

        allowed_to_change_status = self._get_is_allowed_change_status(pull_request)

        if not allowed_to_change_status:

            if status or close_pr:

                h.flash(_('No permission to change pull request status'), 'error')

                raise HTTPForbidden()

        text = request.POST.get('text', '').strip()

        if close_pr:

            text = _('Closing.') + '\n' + text

        comment = create_comment(

            text,

            status,

            pull_request_id=pull_request_id,

            f_path=f_path,

            line_no=line_no,

            closing_pr=close_pr,

        )

        action_logger(self.authuser,

                      'user_commented_pull_request:%s' % pull_request_id,

                      c.db_repo, self.ip_addr, self.sa)

        if status:

            ChangesetStatusModel().set_status(

                c.db_repo.repo_id,

                status,

                c.authuser.user_id,

                comment,

                pull_request=pull_request_id

            )

        if close_pr:

            PullRequestModel().close_pull_request(pull_request_id)

            action_logger(self.authuser,

                          'user_closed_pull_request:%s' % pull_request_id,

                          c.db_repo, self.ip_addr, self.sa)

        Session().commit()

        if not request.environ.get('HTTP_X_PARTIAL_XHR'):

            raise HTTPFound(location=pull_request.url())

        data = {

           'target_id': h.safeid(h.safe_unicode(request.POST.get('f_path'))),

        }

        if comment is not None:

            c.comment = comment

            data.update(comment.get_dict())

            data.update({'rendered_text':

                         render('changeset/changeset_comment_block.html')})

        return data

    @LoginRequired()

    @NotAnonymous()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    @jsonify

    def delete_comment(self, repo_name, comment_id):

        co = ChangesetComment.get(comment_id)

        if co.pull_request.is_closed():

            #don't allow deleting comments on closed pull request

            raise HTTPForbidden()

        owner = co.author.user_id == c.authuser.user_id

        repo_admin = h.HasRepoPermissionAny('repository.admin')(c.repo_name)

        if h.HasPermissionAny('hg.admin') or repo_admin or owner:

            ChangesetCommentsModel().delete(comment=co)

            Session().commit()

            return True

        else:

            raise HTTPForbidden()

    }

})();

/**

 * Comment handling

 */

// move comments to their right location, inside new trs

function move_comments($anchorcomments) {

    $anchorcomments.each(function(i, anchorcomment) {

        var $anchorcomment = $(anchorcomment);

        var target_id = $anchorcomment.data('target-id');

        var $comment_div = _get_add_comment_div(target_id);

        var f_path = $anchorcomment.data('f_path');

        var line_no = $anchorcomment.data('line_no');

        if ($comment_div[0]) {

            $comment_div.append($anchorcomment.children());

            if (f_path && line_no) {

                _comment_div_append_add($comment_div, f_path, line_no);

            } else {

                _comment_div_append_form($comment_div, f_path, line_no);

            }

        } else {

            $anchorcomment.before("Comment to {0} line {1} which is outside the diff context:".format(f_path || '?', line_no || '?'));

        }

    });

    linkInlineComments($('.firstlink'), $('.comment:first-child'));

}

// comment bubble was clicked - insert new tr and show form

function show_comment_form($bubble) {

    var children = $bubble.closest('tr.line').children('[id]');

    var line_td_id = children[children.length - 1].id;

    var $comment_div = _get_add_comment_div(line_td_id);

    var f_path = $bubble.closest('div.full_f_path').data('f_path');

    var parts = line_td_id.split('_');

    var line_no = parts[parts.length-1];

    comment_div_state($comment_div, f_path, line_no, true);

}

// return comment div for target_id - add it if it doesn't exist yet

function _get_add_comment_div(target_id) {

    var comments_box_id = 'comments-' + target_id;

    var $comments_box = $('#' + comments_box_id);

    if (!$comments_box.length) {

        var html = '<tr><td id="{0}" colspan="3" class="inline-comments"></td></tr>'.format(comments_box_id);

        $('#' + target_id).closest('tr').after(html);

        $comments_box = $('#' + comments_box_id);

    }

    return $comments_box;

}

// Set $comment_div state - showing or not showing form and Add button.

// An Add button is shown on non-empty forms when no form is shown.

// The form is controlled by show_form - if undefined, form is only shown for general comments.

function comment_div_state($comment_div, f_path, line_no, show_form_opt) {

    var show_form = show_form_opt !== undefined ? show_form_opt : !f_path && !line_no;

    var $forms = $comment_div.children('.comment-inline-form');

    var $buttonrow = $comment_div.children('.add-button-row');

    var $comments = $comment_div.children('.comment');

    $forms.remove();

    $buttonrow.remove();

    if (show_form) {

        _comment_div_append_form($comment_div, f_path, line_no);

    } else if ($comments.length) {

        _comment_div_append_add($comment_div, f_path, line_no);

    }

}

// append an Add button to $comment_div and hook it up to show form

function _comment_div_append_add($comment_div, f_path, line_no) {

    var addlabel = TRANSLATION_MAP['Add Another Comment'];

    var $add = $('<div class="add-button-row"><span class="btn btn-mini add-button">{0}</span></div>'.format(addlabel));

    $comment_div.append($add);

    $add.children('.add-button').click(function(e) {

        comment_div_state($comment_div, f_path, line_no, true);

    });

}

// append a comment form to $comment_div

function _comment_div_append_form($comment_div, f_path, line_no) {

    var $form_div = $('#comment-inline-form-template').children()

        .clone()

        .addClass('comment-inline-form');

    $comment_div.append($form_div);

    var $form = $comment_div.find("form");

    var $textarea = $form.find('textarea');

    var $mentions_container = $form.find('div.mentions-container');

    $form.submit(function(e) {

        e.preventDefault();

        var text = $textarea.val();

        var review_status = $form.find('input:radio[name=changeset_status]:checked').val();

        var pr_close = $form.find('input:checkbox[name=save_close]:checked').length ? 'on' : '';

            alert("Please provide a comment");

            return false;

        }

        $form.find('.submitting-overlay').show();

        var postData = {

            'text': text,

            'f_path': f_path,

            'line': line_no,

            'changeset_status': review_status,

        };

        var success = function(json_data) {

            $comment_div.append(json_data['rendered_text']);

            comment_div_state($comment_div, f_path, line_no);

            linkInlineComments($('.firstlink'), $('.comment:first-child'));

            if ((review_status || pr_close) && !f_path && !line_no) {

                // Page changed a lot - reload it after closing the submitted form

                comment_div_state($comment_div, f_path, line_no, false);

                location.reload(true);

            }

        };

        ajaxPOST(AJAX_COMMENT_URL, postData, success);

    });

    // create event for hide button

    $form.find('.hide-inline-form').click(function(e) {

        comment_div_state($comment_div, f_path, line_no);

    });

    tooltip_activate();

    MentionsAutoComplete($textarea, $mentions_container, _USERS_AC_DATA);

    if (f_path) {

        $textarea.focus();

    }

}

function deleteComment(comment_id) {

    var url = AJAX_COMMENT_DELETE_URL.replace('__COMMENT_ID__', comment_id);

    var postData = {'_method': 'delete'};

    var success = function(o) {

        $('#comment-'+comment_id).remove();

        // Ignore that this might leave a stray Add button (or have a pending form with another comment) ...

    }

    ajaxPOST(url, postData, success);

}

/**

 * Double link comments

 */

var linkInlineComments = function($firstlinks, $comments){

    if ($comments.length > 0) {

        $firstlinks.html('<a href="#{0}">First comment</a>'.format($comments.prop('id')));

    }

    if ($comments.length <= 1) {

        return;

    }

    $comments.each(function(i, e){

            var prev = '';

            if (i > 0){

                var prev_anchor = $($comments.get(i-1)).prop('id');

                prev = '<a href="#{0}">Previous comment</a>'.format(prev_anchor);

            }

            var next = '';

            if (i+1 < $comments.length){

                var next_anchor = $($comments.get(i+1)).prop('id');

                next = '<a href="#{0}">Next comment</a>'.format(next_anchor);

            }

            $(this).find('.comment-prev-next-links').html(

                '<div class="prev-comment">{0}</div>'.format(prev) +

                '<div class="next-comment">{0}</div>'.format(next));

        });

}

/* activate files.html stuff */

var fileBrowserListeners = function(current_url, node_list_url, url_base){

    var current_url_branch = "?branch=__BRANCH__";

    $('#stay_at_branch').on('click',function(e){

        if(e.currentTarget.checked){

            var uri = current_url_branch;

            uri = uri.replace('__BRANCH__',e.currentTarget.value);

            window.location = uri;

        }

        else{

            window.location = current_url;

        }

    });

    var $node_filter = $('#node_filter');

    var filterTimeout = null;

    var nodes = null;

    var initFilter = function(){

        $('#node_filter_box_loading').show();

        $('#search_activate_id').hide();

        $('#add_node_id').hide();

        $.ajax({url: node_list_url, headers: {'X-PARTIAL-XHR': '1'}, cache: false})

            .done(function(json) {

                    nodes = json.nodes;

                    $('#node_filter_box_loading').hide();

                    $('#node_filter_box').show();

                    $node_filter.focus();

                    if($node_filter.hasClass('init')){

                        $node_filter.val('');

                        $node_filter.removeClass('init');

                    }

                })

            .fail(function() {

                    console.log('fileBrowserListeners initFilter failed to load');

                })

        ;

    }

## -*- coding: utf-8 -*-

## usage:

## <%namespace name="comment" file="/changeset/changeset_file_comment.html"/>

## ${comment.comment_block(co)}

##

<%def name="comment_block(co)">

  <div class="comment" id="comment-${co.comment_id}" line="${co.line_no}">

    <div class="comment-prev-next-links"></div>

    <div class="comment-wrapp">

      <div class="meta">

          <div style="float:left">

               ${h.gravatar(co.author.email, size=20)}

          </div>

          <div class="user">

              ${co.author.full_name_and_username}

          </div>

          <span>

              ${h.age(co.modified_at)}

              %if co.pull_request:

                ${_('on pull request')}

                <a href="${co.pull_request.url()}">"${co.pull_request.title or _("No title")}"</a>

              %else:

                ${_('on this changeset')}

              %endif

              <a class="permalink" href="${co.url()}">&para;</a>

          </span>

          %if h.HasPermissionAny('hg.admin')() or h.HasRepoPermissionAny('repository.admin')(c.repo_name) or co.author.user_id == c.authuser.user_id:

            <div onClick="confirm('${_("Delete comment?")}') && deleteComment(${co.comment_id})" class="buttons delete-comment btn btn-mini">${_('Delete')}</div>

          %endif

      </div>

      <div class="text">

        %if co.status_change:

           <div class="automatic-comment">

             <p>

               <span title="${_('Changeset status')}" class="changeset-status-lbl">${_("Status change")}: ${co.status_change[0].status_lbl}</span>

               <span class="changeset-status-ico"><i class="icon-circle changeset-status-${co.status_change[0].status}"></i></span>

             </p>

           </div>

        %endif

        %if co.text:

          ${h.render_w_mentions(co.text, c.repo_name)|n}

        %endif

      </div>

    </div>

  </div>

</%def>

<%def name="comment_inline_form()">

<div id='comment-inline-form-template' style="display:none">

  <div class="ac">

  %if c.authuser.username != 'default':

    ${h.form('#', class_='inline-form')}

      <div class="clearfix">

        <div class="comment-help">${_('Commenting on line.')}

          <span style="color:#577632" class="tooltip">${_('Comments are in plain text. Use @username inside this text to notify another user.')|n}</span>

        </div>

        <div class="mentions-container"></div>

        <textarea name="text" class="comment-block-ta yui-ac-input"></textarea>

        <div id="status_block_container" class="status-block general-only hidden">

                %if c.pull_request is None:

                  ${_('Set changeset status')}:

                %else:

                  ${_('Vote for pull request status')}:

                %endif

                <span class="general-only cs-only">

                </span>

                <input type="radio" class="status_change_radio" name="changeset_status" id="changeset_status_unchanged" value="" checked="checked" />

                <label for="changeset_status_unchanged">

                  ${_('No change')}

                </label>

                %for status, lbl in c.changeset_statuses:

                    <label>

                      <input type="radio" class="status_change_radio" name="changeset_status" id="${status}" value="${status}">

                      ${lbl}<i class="icon-circle changeset-status-${status}" /></i>

                    </label>

                %endfor

                %if c.pull_request is not None and ( \

                    h.HasPermissionAny('hg.admin')() or h.HasRepoPermissionAny('repository.admin')(c.repo_name) \

                    or c.pull_request.owner.user_id == c.authuser.user_id):

                  <label>

                    <input id="save_close" type="checkbox" name="save_close">

                    ${_("Close")}

                  </label>

                %endif

        </div>

      </div>

      <div class="comment-button">

        <div class="submitting-overlay">${_('Submitting ...')}</div>

        ${h.submit('save', _('Comment'), class_='btn btn-small save-inline-form')}

        ${h.reset('hide-inline-form', _('Cancel'), class_='btn btn-small hide-inline-form')}

      </div>

    ${h.end_form()}

  %else:

      ${h.form('')}

      <div class="clearfix">

          <div class="comment-help">

            ${_('You need to be logged in to comment.')} <a href="${h.url('login_home', came_from=request.path_qs)}">${_('Login now')}</a>

          </div>

      </div>

      <div class="comment-button">

      ${h.reset('hide-inline-form', _('Hide'), class_='btn btn-small hide-inline-form')}

      </div>

      ${h.end_form()}

  %endif

  </div>

</div>

</%def>

## show comment count as "x comments (y inline, z general)"

<%def name="comment_count(inline_cnt, general_cnt)">

    ${'%s (%s, %s)' % (

        ungettext("%d comment", "%d comments", inline_cnt + general_cnt) % (inline_cnt + general_cnt),

        ungettext("%d inline", "%d inline", inline_cnt) % inline_cnt,

        ungettext("%d general", "%d general", general_cnt) % general_cnt

    )}

    <span class="firstlink"></span>

</%def>

## generate inline comments and the main ones

<%def name="generate_comments()">

## original location of comments ... but the ones outside diff context remains here

<div class="comments inline-comments">

  %for f_path, lines in c.inline_comments:

    %for line_no, comments in lines.iteritems():

      <div class="comments-list-chunk" data-f_path="${f_path}" data-line_no="${line_no}" data-target-id="${h.safeid(h.safe_unicode(f_path))}_${line_no}">

        %for co in comments:

            ${comment_block(co)}

        %endfor

      </div>

    %endfor

  %endfor

      <div class="comments-list-chunk" data-f_path="" data-line_no="" data-target-id="general-comments">

        %for co in c.comments:

            ${comment_block(co)}

        %endfor

      </div>

</div>

<div class="comments-number">

    ${comment_count(c.inline_cnt, len(c.comments))}

</div>

</%def>

## MAIN COMMENT FORM

<%def name="comments(change_status=True)">

## global, shared for all edit boxes

<div class="mentions-container" id="mentions_container"></div>

<div class="inline-comments inline-comments-general

            ${'show-general-status' if change_status else ''}">

  <div id="comments-general-comments" class="">

  ## comment_div for general comments

  </div>

</div>

<script>

$(document).ready(function () {

   $(window).on('beforeunload', function(){

      var $textareas = $('.comment-inline-form textarea[name=text]');

      if($textareas.size() > 1 ||

         $textareas.val()) {

         // this message will not be displayed on all browsers

         // (e.g. some versions of Firefox), but the user will still be warned

         return 'There are uncommitted comments.';

      }

   });

});

</script>

</%def>