rhodecode/templates/codeblocks/diffs.mako

<%namespace name="base" file="/base/base.mako"/>
<%namespace name="commentblock" file="/changeset/changeset_file_comment.mako"/>

<%def name="diff_line_anchor(commit, filename, line, type)"><%
return '%s_%s_%i' % (h.md5_safe(commit+filename), type, line)
%></%def>

<%def name="action_class(action)">
<%
    return {
        '-': 'cb-deletion',
        '+': 'cb-addition',
        ' ': 'cb-context',
        }.get(action, 'cb-empty')
%>
</%def>

<%def name="op_class(op_id)">
<%
    return {
        DEL_FILENODE: 'deletion', # file deleted
        BIN_FILENODE: 'warning' # binary diff hidden
    }.get(op_id, 'addition')
%>
</%def>



<%def name="render_diffset(diffset, commit=None,

    # collapse all file diff entries when there are more than this amount of files in the diff
    collapse_when_files_over=20,

    # collapse lines in the diff when more than this amount of lines changed in the file diff
    lines_changed_limit=500,

    # add a ruler at to the output
    ruler_at_chars=0,

    # show inline comments
    use_comments=False,

    # disable new comments
    disable_new_comments=False,

    # special file-comments that were deleted in previous versions
    # it's used for showing outdated comments for deleted files in a PR
    deleted_files_comments=None,

    # for cache purpose
    inline_comments=None,

    # additional menu for PRs
    pull_request_menu=None,

    # show/hide todo next to comments
    show_todos=True,

)">

<%
    diffset_container_id = h.md5_safe(diffset.target_ref)
    collapse_all = len(diffset.files) > collapse_when_files_over
    active_pattern_entries = h.get_active_pattern_entries(getattr(c, 'repo_name', None))
    from rhodecode.lib.diffs import NEW_FILENODE, DEL_FILENODE, \
        MOD_FILENODE, RENAMED_FILENODE, CHMOD_FILENODE, BIN_FILENODE, COPIED_FILENODE
%>

%if use_comments:

## Template for injecting comments
<div id="cb-comments-inline-container-template" class="js-template">
  ${inline_comments_container([])}
</div>

<div class="js-template" id="cb-comment-inline-form-template">
    <div class="comment-inline-form ac">
    %if not c.rhodecode_user.is_default:
        ## render template for inline comments
        ${commentblock.comment_form(form_type='inline')}
    %endif
    </div>
</div>

%endif

%if c.user_session_attrs["diffmode"] == 'sideside':
<style>
.wrapper {
    max-width: 1600px !important;
}
</style>
%endif

%if ruler_at_chars:
<style>
.diff table.cb .cb-content:after {
    content: "";
    border-left: 1px solid blue;
    position: absolute;
    top: 0;
    height: 18px;
    opacity: .2;
    z-index: 10;
    //## +5 to account for diff action (+/-)
    left: ${ruler_at_chars + 5}ch;
</style>
%endif

<div class="diffset ${disable_new_comments and 'diffset-comments-disabled'}">

    <div style="height: 20px; line-height: 20px">
        ## expand/collapse action
        <div class="pull-left">
            <a class="${'collapsed' if collapse_all else ''}" href="#expand-files" onclick="toggleExpand(this, '${diffset_container_id}'); return false">
            % if collapse_all:
                <i class="icon-plus-squared-alt icon-no-margin"></i>${_('Expand all files')}
            % else:
                <i class="icon-minus-squared-alt icon-no-margin"></i>${_('Collapse all files')}
            % endif
            </a>

        </div>

        ## todos
        % if show_todos and getattr(c, 'at_version', None):
        <div class="pull-right">
            <i class="icon-flag-filled" style="color: #949494">TODOs:</i>
             ${_('not available in this view')}
        </div>
        % elif show_todos:
        <div class="pull-right">
            <div class="comments-number" style="padding-left: 10px">
                % if hasattr(c, 'unresolved_comments') and hasattr(c, 'resolved_comments'):
                    <i class="icon-flag-filled" style="color: #949494">TODOs:</i>
                    % if c.unresolved_comments:
                        <a href="#show-todos" onclick="$('#todo-box').toggle(); return false">
                            ${_('{} unresolved').format(len(c.unresolved_comments))}
                        </a>
                    % else:
                        ${_('0 unresolved')}
                    % endif

                    ${_('{} Resolved').format(len(c.resolved_comments))}
                % endif
            </div>
        </div>
        % endif

##         ## comments
##         <div class="pull-right">
##             <div class="comments-number" style="padding-left: 10px">
##                 % if hasattr(c, 'comments') and hasattr(c, 'inline_cnt'):
##                     <i class="icon-comment" style="color: #949494">COMMENTS:</i>
##                     % if c.comments:
##                         <a href="#comments">${_ungettext("{} General", "{} General", len(c.comments)).format(len(c.comments))}</a>,
##                     % else:
##                         ${_('0 General')}
##                     % endif
##
##                     % if c.inline_cnt:
##                         <a href="#" onclick="return Rhodecode.comments.nextComment();"
##                            id="inline-comments-counter">${_ungettext("{} Inline", "{} Inline", c.inline_cnt).format(c.inline_cnt)}
##                         </a>
##                     % else:
##                         ${_('0 Inline')}
##                     % endif
##                 % endif
##
##                 % if pull_request_menu:
##                     <%
##                     outdated_comm_count_ver = pull_request_menu['outdated_comm_count_ver']
##                     %>
##
##                     % if outdated_comm_count_ver:
##                         <a href="#" onclick="showOutdated(); Rhodecode.comments.nextOutdatedComment(); return false;">
##                             (${_("{} Outdated").format(outdated_comm_count_ver)})
##                         </a>
##                         <a href="#" class="showOutdatedComments" onclick="showOutdated(this); return false;"> | ${_('show outdated')}</a>
##                         <a href="#" class="hideOutdatedComments" style="display: none" onclick="hideOutdated(this); return false;"> | ${_('hide outdated')}</a>
##                     % else:
##                         (${_("{} Outdated").format(outdated_comm_count_ver)})
##                     % endif
##
##                 % endif
##
##             </div>
##         </div>

    </div>

    % if diffset.limited_diff:
        <div class="diffset-heading ${(diffset.limited_diff and 'diffset-heading-warning' or '')}">
            <h2 class="clearinner">
                ${_('The requested changes are too big and content was truncated.')}
                <a href="${h.current_route_path(request, fulldiff=1)}" onclick="return confirm('${_("Showing a big diff might take some time and resources, continue?")}')">${_('Show full diff')}</a>
            </h2>
        </div>
    % endif

    <div id="todo-box">
        % if hasattr(c, 'unresolved_comments') and c.unresolved_comments:
            % for co in c.unresolved_comments:
                <a class="permalink" href="#comment-${co.comment_id}"
                   onclick="Rhodecode.comments.scrollToComment($('#comment-${co.comment_id}'))">
                    <i class="icon-flag-filled-red"></i>
                    ${co.comment_id}</a>${('' if loop.last else ',')}
            % endfor
        % endif
    </div>
    %if diffset.has_hidden_changes:
        <p class="empty_data">${_('Some changes may be hidden')}</p>
    %elif not diffset.files:
        <p class="empty_data">${_('No files')}</p>
    %endif

    <div class="filediffs">

    ## initial value could be marked as False later on
    <% over_lines_changed_limit = False %>
    %for i, filediff in enumerate(diffset.files):

        %if filediff.source_file_path and filediff.target_file_path:
            %if filediff.source_file_path != filediff.target_file_path:
                 ## file was renamed, or copied
                %if RENAMED_FILENODE in filediff.patch['stats']['ops']:
                    <%
                        final_file_name = h.literal('{} <i class="icon-angle-left"></i> <del>{}</del>'.format(filediff.target_file_path, filediff.source_file_path))
                        final_path = filediff.target_file_path
                    %>
                %elif COPIED_FILENODE in filediff.patch['stats']['ops']:
                    <%
                        final_file_name = h.literal('{} <i class="icon-angle-left"></i> {}'.format(filediff.target_file_path, filediff.source_file_path))
                        final_path = filediff.target_file_path
                    %>
                %endif
            %else:
                ## file was modified
                <%
                    final_file_name = filediff.source_file_path
                    final_path = final_file_name
                %>
            %endif
        %else:
            %if filediff.source_file_path:
                ## file was deleted
                <%
                    final_file_name = filediff.source_file_path
                    final_path =  final_file_name
                %>
            %else:
                ## file was added
                <%
                    final_file_name = filediff.target_file_path
                    final_path = final_file_name
                %>
            %endif
        %endif

        <%
        lines_changed = filediff.patch['stats']['added'] + filediff.patch['stats']['deleted']
        over_lines_changed_limit = lines_changed > lines_changed_limit
        %>
        ## anchor with support of sticky header
        <div class="anchor" id="a_${h.FID(filediff.raw_id, filediff.patch['filename'])}"></div>

        <input ${(collapse_all and 'checked' or '')} class="filediff-collapse-state collapse-${diffset_container_id}" id="filediff-collapse-${id(filediff)}" type="checkbox" onchange="updateSticky();">
        <div
            class="filediff"
            data-f-path="${filediff.patch['filename']}"
            data-anchor-id="${h.FID(filediff.raw_id, filediff.patch['filename'])}"
        >
        <label for="filediff-collapse-${id(filediff)}" class="filediff-heading">
            <%
                file_comments = list((get_inline_comments(inline_comments, filediff.patch['filename']) or {}).values())
                total_file_comments = [_c for _c in h.itertools.chain.from_iterable(file_comments) if not (_c.outdated or _c.draft)]
            %>
            <div class="filediff-collapse-indicator icon-"></div>

            <%
                from rhodecode.lib.diffs import NEW_FILENODE, DEL_FILENODE, MOD_FILENODE, RENAMED_FILENODE, CHMOD_FILENODE, BIN_FILENODE, COPIED_FILENODE
            %>
            <span class="pill">
                <i class="icon-file-text"></i>
                ${final_file_name}
            </span>

            ## Options PILL
            <span class="pill-group pull-right">
                <details class="details-reset details-inline-block">
                  <summary class="noselect">
                      <i class="pill icon-options cursor-pointer" op="options"></i>
                  </summary>
                  <details-menu class="details-dropdown">

                    <div class="dropdown-item">
                        <ul class="inline-menu">
                            <li class="inline-menu-item"><span class="inline-menu-item-ellipsis">${final_path}</span></li>
                            <li class="inline-menu-item"><span class="pull-right icon-clipboard clipboard-action" data-clipboard-text="${final_path}" title="Copy file path"></span></li>
                        </ul>
                    </div>

                    <div class="dropdown-divider"></div>

                   <div class="dropdown-item">
                       <% permalink = request.current_route_url(_anchor='a_{}'.format(h.FID(filediff.raw_id, filediff.patch['filename']))) %>
                       <ul class="inline-menu">
                           <li class="inline-menu-item"><a href="${permalink}">¶ permalink</a></li>
                           <li class="inline-menu-item"><span class="pull-right icon-clipboard clipboard-action" data-clipboard-text="${permalink}" title="Copy permalink"></span></li>
                       </ul>
                   </div>

                  </details-menu>
                </details>
            </span>

            ## Comments PILL
            <span class="pill-group pull-right">
                <span class="pill" op="comments">
                    <i class="icon-comment"></i> ${len(total_file_comments)}
                </span>
            </span>

            ## DIFF STATS PILL
            <span class="pill-group pull-right">

                ## ops pills
                %if filediff.limited_diff:
                    <span class="pill tooltip" op="limited"
                          title="The stats for this diff are not complete">limited diff</span>
                %endif

                %if NEW_FILENODE in filediff.patch['stats']['ops']:
                    <span class="pill" op="created">created</span>
                %if filediff['target_mode'].startswith('120'):
                    <span class="pill" op="symlink">symlink</span>
                %else:
                    <span class="pill" op="mode">${nice_mode(filediff['target_mode'])}</span>
                %endif
                %endif

                %if RENAMED_FILENODE in filediff.patch['stats']['ops']:
                    <span class="pill" op="renamed">renamed</span>
                %endif

                %if COPIED_FILENODE in filediff.patch['stats']['ops']:
                    <span class="pill" op="copied">copied</span>
                %endif

                %if DEL_FILENODE in filediff.patch['stats']['ops']:
                    <span class="pill" op="removed">removed</span>
                %endif

                %if CHMOD_FILENODE in filediff.patch['stats']['ops']:
                    <span class="pill" op="mode"> ${nice_mode(filediff['source_mode'])} ➡ ${nice_mode(filediff['target_mode'])}</span>
                %endif

                %if BIN_FILENODE in filediff.patch['stats']['ops']:
                    <span class="pill" op="binary">binary</span>
                %if MOD_FILENODE in filediff.patch['stats']['ops']:
                    <span class="pill" op="modified">modified</span>
                %endif
                %endif

                <span class="pill" op="added">${('+' if filediff.patch['stats']['added'] else '')}${filediff.patch['stats']['added']}</span>
                <span class="pill" op="deleted">${((h.safe_int(filediff.patch['stats']['deleted']) or 0) * -1)}</span>
            </span>

        </label>

        ${diff_menu(filediff, use_comments=use_comments)}
        <table id="file-${h.safeid(h.safe_str(filediff.patch['filename']))}" data-f-path="${filediff.patch['filename']}" data-anchor-id="${h.FID(filediff.raw_id, filediff.patch['filename'])}" class="code-visible-block cb cb-diff-${c.user_session_attrs["diffmode"]} code-highlight ${(over_lines_changed_limit and 'cb-collapsed' or '')}">

        ## new/deleted/empty content case
        % if not filediff.hunks:
            ## Comment container, on "fakes" hunk that contains all data to render comments
            ${render_hunk_lines(filediff, c.user_session_attrs["diffmode"], filediff.hunk_ops, use_comments=use_comments, inline_comments=inline_comments, active_pattern_entries=active_pattern_entries)}
        % endif

        %if filediff.limited_diff:
                <tr class="cb-warning cb-collapser">
                    <td class="cb-text" ${(c.user_session_attrs["diffmode"] == 'unified' and 'colspan=4' or 'colspan=6')}>
                        ${_('The requested commit or file is too big and content was truncated.')} <a href="${h.current_route_path(request, fulldiff=1)}" onclick="return confirm('${_("Showing a big diff might take some time and resources, continue?")}')">${_('Show full diff')}</a>
                    </td>
                </tr>
        %else:
            %if over_lines_changed_limit:
                <tr class="cb-warning cb-collapser">
                    <td class="cb-text" ${(c.user_session_attrs["diffmode"] == 'unified' and 'colspan=4' or 'colspan=6')}>
                        ${_('This diff has been collapsed as it changes many lines, (%i lines changed)' % lines_changed)}
                        <a href="#" class="cb-expand"
                           onclick="$(this).closest('table').removeClass('cb-collapsed'); updateSticky(); return false;">${_('Show them')}
                        </a>
                        <a href="#" class="cb-collapse"
                           onclick="$(this).closest('table').addClass('cb-collapsed'); updateSticky(); return false;">${_('Hide them')}
                        </a>
                    </td>
                </tr>
            %endif
        %endif

        % for hunk in filediff.hunks:
            <tr class="cb-hunk">
                <td ${(c.user_session_attrs["diffmode"] == 'unified' and 'colspan=3' or '')}>
                    ## TODO: dan: add ajax loading of more context here
                    ## <a href="#">
                        <i class="icon-more"></i>
                    ## </a>
                </td>
                <td ${(c.user_session_attrs["diffmode"] == 'sideside' and 'colspan=5' or '')}>
                    @@
                    -${hunk.source_start},${hunk.source_length}
                    +${hunk.target_start},${hunk.target_length}
                    ${hunk.section_header}
                </td>
            </tr>

            ${render_hunk_lines(filediff, c.user_session_attrs["diffmode"], hunk, use_comments=use_comments, inline_comments=inline_comments, active_pattern_entries=active_pattern_entries)}
        % endfor

        <% unmatched_comments = (inline_comments or {}).get(filediff.patch['filename'], {}) %>

        ## outdated comments that do not fit into currently displayed lines
        % for lineno, comments in unmatched_comments.items():

            %if c.user_session_attrs["diffmode"] == 'unified':
                % if loop.index == 0:
                <tr class="cb-hunk">
                    <td colspan="3"></td>
                    <td>
                        <div>
                        ${_('Unmatched/outdated inline comments below')}
                        </div>
                    </td>
                </tr>
                % endif
                <tr class="cb-line">
                    <td class="cb-data cb-context"></td>
                    <td class="cb-lineno cb-context"></td>
                    <td class="cb-lineno cb-context"></td>
                    <td class="cb-content cb-context">
                        ${inline_comments_container(comments, active_pattern_entries=active_pattern_entries)}
                    </td>
                </tr>
            %elif c.user_session_attrs["diffmode"] == 'sideside':
                % if loop.index == 0:
                <tr class="cb-comment-info">
                    <td colspan="2"></td>
                    <td class="cb-line">
                        <div>
                        ${_('Unmatched/outdated inline comments below')}
                        </div>
                    </td>
                    <td colspan="2"></td>
                    <td class="cb-line">
                        <div>
                        ${_('Unmatched/outdated comments below')}
                        </div>
                    </td>
                </tr>
                % endif
                <tr class="cb-line">
                    <td class="cb-data cb-context"></td>
                    <td class="cb-lineno cb-context"></td>
                    <td class="cb-content cb-context">
                        % if lineno.startswith('o'):
                            ${inline_comments_container(comments, active_pattern_entries=active_pattern_entries)}
                        % endif
                    </td>

                    <td class="cb-data cb-context"></td>
                    <td class="cb-lineno cb-context"></td>
                    <td class="cb-content cb-context">
                        % if lineno.startswith('n'):
                            ${inline_comments_container(comments, active_pattern_entries=active_pattern_entries)}
                        % endif
                    </td>
                </tr>
            %endif

        % endfor

            </table>
        </div>
    %endfor

    ## outdated comments that are made for a file that has been deleted
    % for filename, comments_dict in (deleted_files_comments or {}).items():

        <%
            display_state = 'display: none'
            open_comments_in_file = [x for x in comments_dict['comments'] if x.outdated is False]
            if open_comments_in_file:
                display_state = ''
            fid = str(id(filename))
        %>
        <div class="filediffs filediff-outdated" style="${display_state}">
            <input ${(collapse_all and 'checked' or '')} class="filediff-collapse-state collapse-${diffset_container_id}" id="filediff-collapse-${id(filename)}" type="checkbox" onchange="updateSticky();">
            <div class="filediff" data-f-path="${filename}"  id="a_${h.FID(fid, filename)}">
                <label for="filediff-collapse-${id(filename)}" class="filediff-heading">
                    <div class="filediff-collapse-indicator icon-"></div>

                    <span class="pill">
                        ## file was deleted
                        ${filename}
                    </span>
                    <span class="pill-group pull-left" >
                        ## file op, doesn't need translation
                        <span class="pill" op="removed">unresolved comments</span>
                    </span>
                    <a class="pill filediff-anchor" href="#a_${h.FID(fid, filename)}">¶</a>
                    <span class="pill-group pull-right">
                        <span class="pill" op="deleted">
                            % if comments_dict['stats'] >0:
                                -${comments_dict['stats']}
                            % else:
                                 ${comments_dict['stats']}
                            % endif
                        </span>
                    </span>
                </label>

                <table class="cb cb-diff-${c.user_session_attrs["diffmode"]} code-highlight ${(over_lines_changed_limit and 'cb-collapsed' or '')}">
                    <tr>
                        % if c.user_session_attrs["diffmode"] == 'unified':
                        <td></td>
                        %endif

                        <td></td>
                        <td class="cb-text cb-${op_class(BIN_FILENODE)}" ${(c.user_session_attrs["diffmode"] == 'unified' and 'colspan=4' or 'colspan=5')}>
                        <strong>${_('This file was removed from diff during updates to this pull-request.')}</strong><br/>
                        ${_('There are still outdated/unresolved comments attached to it.')}
                        </td>
                    </tr>
                    %if c.user_session_attrs["diffmode"] == 'unified':
                    <tr class="cb-line">
                        <td class="cb-data cb-context"></td>
                        <td class="cb-lineno cb-context"></td>
                        <td class="cb-lineno cb-context"></td>
                        <td class="cb-content cb-context">
                            ${inline_comments_container(comments_dict['comments'], active_pattern_entries=active_pattern_entries)}
                        </td>
                    </tr>
                    %elif c.user_session_attrs["diffmode"] == 'sideside':
                    <tr class="cb-line">
                        <td class="cb-data cb-context"></td>
                        <td class="cb-lineno cb-context"></td>
                        <td class="cb-content cb-context"></td>

                        <td class="cb-data cb-context"></td>
                        <td class="cb-lineno cb-context"></td>
                        <td class="cb-content cb-context">
                            ${inline_comments_container(comments_dict['comments'], active_pattern_entries=active_pattern_entries)}
                        </td>
                    </tr>
                    %endif
                </table>
            </div>
        </div>
    % endfor

</div>
</div>
</%def>

<%def name="nice_mode(filemode)">
    ${(filemode.startswith('100') and filemode[3:] or filemode)}
</%def>

<%def name="diff_menu(filediff, use_comments=False)">
    <div class="filediff-menu">

    %if filediff.diffset.source_ref:

    ## FILE BEFORE CHANGES
    %if filediff.operation in ['D', 'M']:
        <a
            class="tooltip"
            href="${h.route_path('repo_files',repo_name=filediff.diffset.target_repo_name,commit_id=filediff.diffset.source_ref,f_path=filediff.source_file_path)}"
            title="${h.tooltip(_('Show file at commit: %(commit_id)s') % {'commit_id': filediff.diffset.source_ref[:12]})}"
        >
            ${_('Show file before')}
        </a> |
    %else:
        <span
            class="tooltip"
            title="${h.tooltip(_('File not present at commit: %(commit_id)s') % {'commit_id': filediff.diffset.source_ref[:12]})}"
        >
            ${_('Show file before')}
        </span> |
    %endif

    ## FILE AFTER CHANGES
    %if filediff.operation in ['A', 'M']:
        <a
            class="tooltip"
            href="${h.route_path('repo_files',repo_name=filediff.diffset.source_repo_name,commit_id=filediff.diffset.target_ref,f_path=filediff.target_file_path)}"
            title="${h.tooltip(_('Show file at commit: %(commit_id)s') % {'commit_id': filediff.diffset.target_ref[:12]})}"
        >
            ${_('Show file after')}
        </a>
    %else:
        <span
            class="tooltip"
            title="${h.tooltip(_('File not present at commit: %(commit_id)s') % {'commit_id': filediff.diffset.target_ref[:12]})}"
            >
            ${_('Show file after')}
        </span>
    %endif

    % if use_comments:
    |
    <a href="#" onclick="Rhodecode.comments.toggleDiffComments(this);return toggleElement(this)"
                data-toggle-on="${_('Hide comments')}"
                data-toggle-off="${_('Show comments')}">
        <span class="hide-comment-button">${_('Hide comments')}</span>
    </a>
    % endif

    %endif

    </div>
</%def>


<%def name="inline_comments_container(comments, active_pattern_entries=None, line_no='', f_path='')">

<div class="inline-comments">
    %for comment in comments:
        ${commentblock.comment_block(comment, inline=True, active_pattern_entries=active_pattern_entries)}
    %endfor

    <%
        extra_class = ''
        extra_style = ''

        if comments and comments[-1].outdated_at_version(c.at_version_num):
            extra_class = ' comment-outdated'
            extra_style = 'display: none;'

    %>

    <div class="reply-thread-container-wrapper${extra_class}" style="${extra_style}">
        <div class="reply-thread-container${extra_class}">
            <div class="reply-thread-gravatar">
                % if c.rhodecode_user.username != h.DEFAULT_USER:
                ${base.gravatar(c.rhodecode_user.email, 20, tooltip=True, user=c.rhodecode_user)}
                % endif
            </div>

            <div class="reply-thread-reply-button">
                % if c.rhodecode_user.username != h.DEFAULT_USER:
                ## initial reply button, some JS logic can append here a FORM to leave a first comment.
                <button class="cb-comment-add-button" onclick="return Rhodecode.comments.createComment(this, '${f_path}', '${line_no}', null)">Reply...</button>
                % endif
            </div>
            ##% endif
            <div class="reply-thread-last"></div>
        </div>
    </div>
</div>

</%def>

<%!

def get_inline_comments(comments, filename):
    if hasattr(filename, 'str_path'):
        filename = filename.str_path

    if not isinstance(filename, str):
        return None

    if comments and filename in comments:
        return comments[filename]

    return None

def get_comments_for(diff_type, comments, filename, line_version, line_number):
    if hasattr(filename, 'str_path'):
        filename = filename.str_path

    if not isinstance(filename, str):
        return None

    file_comments = get_inline_comments(comments, filename)
    if file_comments is None:
        return None

    line_key = f'{line_version}{line_number}' ## e.g o37, n12
    if line_key in file_comments:
        data = file_comments.pop(line_key)
        return data
%>

<%def name="render_hunk_lines_sideside(filediff, hunk, use_comments=False, inline_comments=None, active_pattern_entries=None)">

    <% chunk_count = 1 %>
    %for loop_obj, item in h.looper(hunk.sideside):
    <%
    line = item
    i = loop_obj.index
    prev_line = loop_obj.previous
    old_line_anchor, new_line_anchor = None, None

    if line.original.lineno:
        old_line_anchor = diff_line_anchor(filediff.raw_id, hunk.source_file_path, line.original.lineno, 'o')
    if line.modified.lineno:
        new_line_anchor = diff_line_anchor(filediff.raw_id, hunk.target_file_path, line.modified.lineno, 'n')

    line_action = line.modified.action or line.original.action
    prev_line_action = prev_line and (prev_line.modified.action or prev_line.original.action)
    %>

    <tr class="cb-line">
        <td class="cb-data ${action_class(line.original.action)}"
            data-line-no="${line.original.lineno}"
            >

            <% line_old_comments, line_old_comments_no_drafts = None, None %>
            %if line.original.get_comment_args:
                <%
                    line_old_comments = get_comments_for('side-by-side', inline_comments, *line.original.get_comment_args)
                    line_old_comments_no_drafts = [c for c in line_old_comments if not c.draft] if line_old_comments else []
                    has_outdated = any([x.outdated for x in line_old_comments_no_drafts])
                %>
            %endif
            %if line_old_comments_no_drafts:
                % if has_outdated:
                    <i class="tooltip toggle-comment-action icon-comment-toggle" title="${_('Comments including outdated: {}. Click here to toggle them.').format(len(line_old_comments_no_drafts))}" onclick="return Rhodecode.comments.toggleLineComments(this)"></i>
                % else:
                    <i class="tooltip toggle-comment-action icon-comment" title="${_('Comments: {}. Click to toggle them.').format(len(line_old_comments_no_drafts))}" onclick="return Rhodecode.comments.toggleLineComments(this)"></i>
                % endif
            %endif
        </td>
        <td class="cb-lineno ${action_class(line.original.action)}"
            data-line-no="${line.original.lineno}"
            %if old_line_anchor:
            id="${old_line_anchor}"
            %endif
        >
            %if line.original.lineno:
            <a name="${old_line_anchor}" href="#${old_line_anchor}">${line.original.lineno}</a>
            %endif
        </td>

        <% line_no = 'o{}'.format(line.original.lineno) %>
        <td class="cb-content ${action_class(line.original.action)}"
            data-line-no="${line_no}"
            >
            %if use_comments and line.original.lineno:
            ${render_add_comment_button(line_no=line_no, f_path=filediff.patch['filename'])}
            %endif
            <span class="cb-code"><span class="cb-action ${action_class(line.original.action)}"></span>${line.original.content or '' | n}</span>

            %if use_comments and line.original.lineno and line_old_comments:
                ${inline_comments_container(line_old_comments, active_pattern_entries=active_pattern_entries, line_no=line_no, f_path=filediff.patch['filename'])}
            %endif

        </td>
        <td class="cb-data ${action_class(line.modified.action)}"
            data-line-no="${line.modified.lineno}"
            >
            <div>

            <% line_new_comments, line_new_comments_no_drafts = None, None %>
            %if line.modified.get_comment_args:
                <%
                    line_new_comments = get_comments_for('side-by-side', inline_comments, *line.modified.get_comment_args)
                    line_new_comments_no_drafts = [c for c in line_new_comments if not c.draft] if line_new_comments else []
                    has_outdated = any([x.outdated for x in line_new_comments_no_drafts])
                %>
            %endif

            %if line_new_comments_no_drafts:
                % if has_outdated:
                    <i class="tooltip toggle-comment-action icon-comment-toggle" title="${_('Comments including outdated: {}. Click here to toggle them.').format(len(line_new_comments_no_drafts))}" onclick="return Rhodecode.comments.toggleLineComments(this)"></i>
                % else:
                    <i class="tooltip toggle-comment-action icon-comment" title="${_('Comments: {}. Click to toggle them.').format(len(line_new_comments_no_drafts))}" onclick="return Rhodecode.comments.toggleLineComments(this)"></i>
                % endif
            %endif
            </div>
        </td>
        <td class="cb-lineno ${action_class(line.modified.action)}"
            data-line-no="${line.modified.lineno}"
            %if new_line_anchor:
            id="${new_line_anchor}"
            %endif
            >
            %if line.modified.lineno:
                <a name="${new_line_anchor}" href="#${new_line_anchor}">${line.modified.lineno}</a>
            %endif
        </td>

        <% line_no = 'n{}'.format(line.modified.lineno) %>
        <td class="cb-content ${action_class(line.modified.action)}"
            data-line-no="${line_no}"
            >
            %if use_comments and line.modified.lineno:
            ${render_add_comment_button(line_no=line_no, f_path=filediff.patch['filename'])}
            %endif
            <span class="cb-code"><span class="cb-action ${action_class(line.modified.action)}"></span>${line.modified.content or '' | n}</span>
                % if line_action in ['+', '-'] and prev_line_action not in ['+', '-']:
                <div class="nav-chunk" style="visibility: hidden">
                    <i class="icon-eye" title="viewing diff hunk-${hunk.index}-${chunk_count}"></i>
                </div>
                <% chunk_count +=1 %>
                % endif
            %if use_comments and line.modified.lineno and line_new_comments:
            ${inline_comments_container(line_new_comments, active_pattern_entries=active_pattern_entries, line_no=line_no, f_path=filediff.patch['filename'])}
            %endif

        </td>
    </tr>
    %endfor
</%def>


<%def name="render_hunk_lines_unified(filediff, hunk, use_comments=False,  inline_comments=None, active_pattern_entries=None)">
    %for old_line_no, new_line_no, action, content, comments_args in hunk.unified:

    <%
    old_line_anchor, new_line_anchor = None, None
    if old_line_no:
        old_line_anchor = diff_line_anchor(filediff.raw_id, hunk.source_file_path, old_line_no, 'o')
    if new_line_no:
        new_line_anchor = diff_line_anchor(filediff.raw_id, hunk.target_file_path, new_line_no, 'n')
    %>
    <tr class="cb-line">
        <td class="cb-data ${action_class(action)}">
            <div>

                <% comments, comments_no_drafts = None, None %>
                %if comments_args:
                    <%
                        comments = get_comments_for('unified', inline_comments, *comments_args)
                        comments_no_drafts = [c for c in line_new_comments if not c.draft] if line_new_comments else []
                        has_outdated = any([x.outdated for x in comments_no_drafts])
                    %>
                %endif

                % if comments_no_drafts:
                    % if has_outdated:
                        <i class="tooltip toggle-comment-action icon-comment-toggle" title="${_('Comments including outdated: {}. Click here to toggle them.').format(len(comments_no_drafts))}" onclick="return Rhodecode.comments.toggleLineComments(this)"></i>
                    % else:
                        <i class="tooltip toggle-comment-action icon-comment" title="${_('Comments: {}. Click to toggle them.').format(len(comments_no_drafts))}" onclick="return Rhodecode.comments.toggleLineComments(this)"></i>
                    % endif
                % endif
            </div>
        </td>
        <td class="cb-lineno ${action_class(action)}"
            data-line-no="${old_line_no}"
            %if old_line_anchor:
            id="${old_line_anchor}"
            %endif
        >
            %if old_line_anchor:
            <a name="${old_line_anchor}" href="#${old_line_anchor}">${old_line_no}</a>
            %endif
        </td>
        <td class="cb-lineno ${action_class(action)}"
            data-line-no="${new_line_no}"
            %if new_line_anchor:
            id="${new_line_anchor}"
            %endif
        >
            %if new_line_anchor:
            <a name="${new_line_anchor}" href="#${new_line_anchor}">${new_line_no}</a>
            %endif
        </td>
        <% line_no = '{}{}'.format(new_line_no and 'n' or 'o', new_line_no or old_line_no) %>
        <td class="cb-content ${action_class(action)}"
            data-line-no="${line_no}"
            >
            %if use_comments:
            ${render_add_comment_button(line_no=line_no, f_path=filediff.patch['filename'])}
            %endif
            <span class="cb-code"><span class="cb-action ${action_class(action)}"></span> ${content or '' | n}</span>
            %if use_comments and comments:
            ${inline_comments_container(comments, active_pattern_entries=active_pattern_entries, line_no=line_no, f_path=filediff.patch['filename'])}
            %endif
        </td>
    </tr>
    %endfor
</%def>


<%def name="render_hunk_lines(filediff, diff_mode, hunk, use_comments, inline_comments, active_pattern_entries)">
    % if diff_mode == 'unified':
        ${render_hunk_lines_unified(filediff, hunk, use_comments=use_comments, inline_comments=inline_comments, active_pattern_entries=active_pattern_entries)}
    % elif diff_mode == 'sideside':
        ${render_hunk_lines_sideside(filediff, hunk, use_comments=use_comments, inline_comments=inline_comments, active_pattern_entries=active_pattern_entries)}
    % else:
        <tr class="cb-line">
            <td>unknown diff mode</td>
        </tr>
    % endif
</%def>file changes


<%def name="render_add_comment_button(line_no='', f_path='')">
% if not c.rhodecode_user.is_default:
<button class="btn btn-small btn-primary cb-comment-box-opener" onclick="return Rhodecode.comments.createComment(this, '${f_path}', '${line_no}', null)">
    <span><i class="icon-comment"></i></span>
</button>
% endif
</%def>

<%def name="render_diffset_menu(diffset, range_diff_on=None, commit=None, pull_request_menu=None)">
    <% diffset_container_id = h.md5_safe(diffset.target_ref) %>

    <div id="diff-file-sticky" class="diffset-menu clearinner">
        ## auto adjustable
        <div class="sidebar__inner">
            <div class="sidebar__bar">
            <div class="pull-right">

                <div class="btn-group" style="margin-right: 5px;">
                    <a class="tooltip btn" onclick="scrollDown();return false" title="${_('Scroll to page bottom')}">
                        <i class="icon-arrow_down"></i>
                    </a>
                    <a class="tooltip btn" onclick="scrollUp();return false" title="${_('Scroll to page top')}">
                        <i class="icon-arrow_up"></i>
                    </a>
                </div>

                <div class="btn-group">
                    <a class="btn tooltip toggle-wide-diff" href="#toggle-wide-diff" onclick="toggleWideDiff(this); return false" title="${h.tooltip(_('Toggle wide diff'))}">
                    <i class="icon-wide-mode"></i>
                    </a>
                </div>
                <div class="btn-group">

                <a
                  class="btn ${(c.user_session_attrs["diffmode"] == 'sideside' and 'btn-active')} tooltip"
                  title="${h.tooltip(_('View diff as side by side'))}"
                  href="${h.current_route_path(request, diffmode='sideside')}">
                    <span>${_('Side by Side')}</span>
                </a>

                <a
                  class="btn ${(c.user_session_attrs["diffmode"] == 'unified' and 'btn-active')} tooltip"
                  title="${h.tooltip(_('View diff as unified'))}" href="${h.current_route_path(request, diffmode='unified')}">
                    <span>${_('Unified')}</span>
                </a>

                % if range_diff_on is True:
                    <a
                      title="${_('Turn off: Show the diff as commit range')}"
                      class="btn btn-primary"
                      href="${h.current_route_path(request, **{"range-diff":"0"})}">
                        <span>${_('Range Diff')}</span>
                   </a>
                % elif range_diff_on is False:
                    <a
                      title="${_('Show the diff as commit range')}"
                      class="btn"
                      href="${h.current_route_path(request, **{"range-diff":"1"})}">
                        <span>${_('Range Diff')}</span>
                   </a>
                % endif
            </div>
                <div class="btn-group">

                <details class="details-reset details-inline-block">
                  <summary class="noselect btn">
                        <i class="icon-options cursor-pointer" op="options"></i>
                  </summary>

                  <details-menu class="details-dropdown" style="top: 35px;">

                   <div class="dropdown-item">
                        <div style="padding: 2px 0px">
                        % if request.GET.get('ignorews', '') == '1':
                            <a href="${h.current_route_path(request, ignorews=0)}">${_('Show whitespace changes')}</a>
                        % else:
                            <a href="${h.current_route_path(request, ignorews=1)}">${_('Hide whitespace changes')}</a>
                        % endif
                        </div>
                    </div>

                   <div class="dropdown-item">
                       <div style="padding: 2px 0px">
                        % if request.GET.get('fullcontext', '') == '1':
                            <a href="${h.current_route_path(request, fullcontext=0)}">${_('Hide full context diff')}</a>
                        % else:
                            <a href="${h.current_route_path(request, fullcontext=1)}">${_('Show full context diff')}</a>
                        % endif
                        </div>
                   </div>

                   % if commit:
                   <div class="dropdown-item">
                    <a href="${h.route_path('repo_commit_raw',repo_name=c.repo_name,commit_id=c.commit.raw_id)}">
                        ${_('Raw Diff')}
                    </a>
                   </div>

                   <div class="dropdown-item">
                    <a href="${h.route_path('repo_commit_patch',repo_name=c.repo_name,commit_id=c.commit.raw_id)}">
                        ${_('Patch Diff')}
                    </a>
                   </div>

                   <div class="dropdown-item">
                    <a href="${h.route_path('repo_commit_download',repo_name=c.repo_name,commit_id=c.commit.raw_id,_query=dict(diff='download'))}">
                        ${_('Download Diff')}
                    </a>
                   </div>
                    % endif

                  </details-menu>

                </details>

                </div>
        </div>
            <div class="pull-left">
            <div class="btn-group">
              <div class="pull-left">
                ${h.hidden('file_filter_{}'.format(diffset_container_id))}
              </div>

            </div>
            </div>
        </div>
        <div class="fpath-placeholder pull-left">
            <i class="icon-file-text"></i>
            <strong class="fpath-placeholder-text">
            Context file:
            </strong>
        </div>
        <div class="pull-right noselect">
            %if commit:
                <span>
                    <code>${h.show_id(commit)}</code>
                </span>
            %elif pull_request_menu and pull_request_menu.get('pull_request'):
                <span>
                    <code>!${pull_request_menu['pull_request'].pull_request_id}</code>
                </span>
            %endif
            % if commit or pull_request_menu:
                <span class="tooltip" title="Navigate to previous or next change inside files." id="diff_nav">Loading diff...:</span>
                <span class="cursor-pointer" onclick="scrollToPrevChunk(); return false">
                    <i class="icon-angle-up"></i>
                </span>
                <span class="cursor-pointer" onclick="scrollToNextChunk(); return false">
                    <i class="icon-angle-down"></i>
                </span>
            % endif
        </div>
        <div class="sidebar_inner_shadow"></div>
        </div>
    </div>

    % if diffset:
        %if diffset.limited_diff:
            <% file_placeholder = _ungettext('%(num)s file changed', '%(num)s files changed', diffset.changed_files) % {'num': diffset.changed_files} %>
        %else:
            <% file_placeholder = h.literal(_ungettext('%(num)s file changed: <span class="op-added">%(linesadd)s inserted</span>, <span class="op-deleted">%(linesdel)s deleted</span>', '%(num)s files changed: <span class="op-added">%(linesadd)s inserted</span>, <span class="op-deleted">%(linesdel)s deleted</span>',
            diffset.changed_files) % {'num': diffset.changed_files, 'linesadd': diffset.lines_added, 'linesdel': diffset.lines_deleted}) %>

        %endif
        ## case on range-diff placeholder needs to be updated
        % if range_diff_on is True:
            <% file_placeholder = _('Disabled on range diff') %>
        % endif

        <script type="text/javascript">
        var feedFilesOptions = function (query, initialData) {
            var data = {results: []};
            var isQuery = typeof query.term !== 'undefined';

            var section = _gettext('Changed files');
            var filteredData = [];

            //filter results
            $.each(initialData.results, function (idx, value) {

                if (!isQuery || query.term.length === 0 || value.text.toUpperCase().indexOf(query.term.toUpperCase()) >= 0) {
                    filteredData.push({
                        'id': this.id,
                        'text': this.text,
                        "ops": this.ops,
                    })
                }

            });

            data.results = filteredData;

            query.callback(data);
        };

        var selectionFormatter = function(data, escapeMarkup) {
            var container = '<div class="filelist" style="padding-right:100px">{0}</div>';
            var tmpl = '<div><strong>{0}</strong></div>'.format(escapeMarkup(data['text']));
            var pill = '<div class="pill-group" style="position: absolute; top:7px; right: 0">' +
                        '<span class="pill" op="added">{0}</span>' +
                        '<span class="pill" op="deleted">{1}</span>' +
                       '</div>'
                    ;
            var added = data['ops']['added'];
            if (added === 0) {
                // don't show +0
                added = 0;
            } else {
                added = '+' + added;
            }

            var deleted = -1*data['ops']['deleted'];

            tmpl += pill.format(added, deleted);
            return container.format(tmpl);
        };
        var formatFileResult = function(result, container, query, escapeMarkup) {
            return selectionFormatter(result, escapeMarkup);
        };

        var formatSelection = function (data, container) {
            return '${file_placeholder}'
        };

        if (window.preloadFileFilterData === undefined) {
            window.preloadFileFilterData = {}
        }

        preloadFileFilterData["${diffset_container_id}"] = {
            results: [
                % for filediff in diffset.files:
                    {id:"a_${h.FID(filediff.raw_id, filediff.patch['filename'])}",
                     text:"${filediff.patch['filename']}",
                     ops:${h.str_json(filediff.patch['stats'])|n}}${('' if loop.last else ',')}
                % endfor
            ]
        };

        var diffFileFilterId = "#file_filter_" + "${diffset_container_id}";
        var diffFileFilter = $(diffFileFilterId).select2({
            'dropdownAutoWidth': true,
            'width': 'auto',

            containerCssClass: "drop-menu",
            dropdownCssClass: "drop-menu-dropdown",
            data: preloadFileFilterData["${diffset_container_id}"],
            query: function(query) {
                feedFilesOptions(query, preloadFileFilterData["${diffset_container_id}"]);
            },
            initSelection: function(element, callback) {
              callback({'init': true});
            },
            formatResult: formatFileResult,
            formatSelection: formatSelection
        });

        % if range_diff_on is True:
            diffFileFilter.select2("enable", false);
        % endif

        $(diffFileFilterId).on('select2-selecting', function (e) {
            var idSelector = e.choice.id;

            // expand the container if we quick-select the field
            $('#'+idSelector).next().prop('checked', false);
            // hide the mast as we later do preventDefault()
            $("#select2-drop-mask").click();

            window.location.hash = '#'+idSelector;
            updateSticky();

            e.preventDefault();
        });

        diffNavText = 'diff navigation:'

        getCurrentChunk = function () {

            var chunksAll = $('.nav-chunk').filter(function () {
                return $(this).parents('.filediff').prev().get(0).checked !== true
            })
            var chunkSelected = $('.nav-chunk.selected');
            var initial = false;

            if (chunkSelected.length === 0) {
                // no initial chunk selected, we pick first
                chunkSelected = $(chunksAll.get(0));
                var initial = true;
            }

            return {
                'all': chunksAll,
                'selected': chunkSelected,
                'initial': initial,
            }
        }

        animateDiffNavText = function () {
            var $diffNav = $('#diff_nav')

            var callback = function () {
                $diffNav.animate({'opacity': 1.00}, 200)
            };
            $diffNav.animate({'opacity': 0.15}, 200, callback);
        }

        scrollToChunk = function (moveBy) {
            var chunk = getCurrentChunk();
            var all = chunk.all
            var selected = chunk.selected

            var curPos = all.index(selected);
            var newPos = curPos;
            if (!chunk.initial) {
                var newPos = curPos + moveBy;
            }

            var curElem = all.get(newPos);

            if (curElem === undefined) {
                // end or back
                $('#diff_nav').html('no next diff element:')
                animateDiffNavText()
                return
            } else if (newPos < 0) {
                $('#diff_nav').html('no previous diff element:')
                animateDiffNavText()
                return
            } else {
                $('#diff_nav').html(diffNavText)
            }

            curElem = $(curElem)
            var offset = 100;
            $(window).scrollTop(curElem.position().top - offset);

            //clear selection
            all.removeClass('selected')
            curElem.addClass('selected')
        }

        scrollToPrevChunk = function () {
            scrollToChunk(-1)
        }
        scrollToNextChunk = function () {
            scrollToChunk(1)
        }

        </script>
    % endif

    <script type="text/javascript">
        $('#diff_nav').html('loading diff...') // wait until whole page is loaded

        $(document).ready(function () {

            var contextPrefix = _gettext('Context file: ');
            ## sticky sidebar
            var sidebarElement = document.getElementById('diff-file-sticky');
            sidebar = new StickySidebar(sidebarElement, {
                  topSpacing: 0,
                  bottomSpacing: 0,
                  innerWrapperSelector: '.sidebar__inner'
            });
            sidebarElement.addEventListener('affixed.static.stickySidebar', function () {
                // reset our file so it's not holding new value
                $('.fpath-placeholder-text').html(contextPrefix + ' - ')
            });

            updateSticky = function () {
                sidebar.updateSticky();
                Waypoint.refreshAll();
            };

            var animateText = function (fPath, anchorId) {
                fPath = Select2.util.escapeMarkup(fPath);
                $('.fpath-placeholder-text').html(contextPrefix + '<a href="#a_' + anchorId + '">' + fPath + '</a>')
            };

            ## dynamic file waypoints
            var setFPathInfo = function(fPath, anchorId){
                animateText(fPath, anchorId)
            };

            var codeBlock = $('.filediff');

            // forward waypoint
            codeBlock.waypoint(
                function(direction) {
                    if (direction === "down"){
                        setFPathInfo($(this.element).data('fPath'), $(this.element).data('anchorId'))
                    }
                }, {
                    offset: function () {
                        return 70;
                    },
                    context: '.fpath-placeholder'
                }
            );

            // backward waypoint
            codeBlock.waypoint(
                function(direction) {
                    if (direction === "up"){
                        setFPathInfo($(this.element).data('fPath'), $(this.element).data('anchorId'))
                    }
                }, {
                    offset: function () {
                        return -this.element.clientHeight + 90;
                    },
                    context: '.fpath-placeholder'
                }
            );

            toggleWideDiff = function (el) {
                updateSticky();
                var wide = Rhodecode.comments.toggleWideMode(this);
                storeUserSessionAttr('rc_user_session_attr.wide_diff_mode', wide);
                if (wide === true) {
                    $(el).addClass('btn-active');
                } else {
                    $(el).removeClass('btn-active');
                }
                return null;
            };

            toggleExpand = function (el, diffsetEl) {
                var el = $(el);
                if (el.hasClass('collapsed')) {
                    $('.filediff-collapse-state.collapse-{0}'.format(diffsetEl)).prop('checked', false);
                    el.removeClass('collapsed');
                    el.html(
                        '<i class="icon-minus-squared-alt icon-no-margin"></i>' +
                        _gettext('Collapse all files'));
                }
                else {
                    $('.filediff-collapse-state.collapse-{0}'.format(diffsetEl)).prop('checked', true);
                    el.addClass('collapsed');
                    el.html(
                        '<i class="icon-plus-squared-alt icon-no-margin"></i>' +
                        _gettext('Expand all files'));
                }
                updateSticky()
            };

            toggleCommitExpand = function (el) {
                var $el = $(el);
                var commits = $el.data('toggleCommitsCnt');
                var collapseMsg = _ngettext('Collapse {0} commit', 'Collapse {0} commits', commits).format(commits);
                var expandMsg = _ngettext('Expand {0} commit', 'Expand {0} commits', commits).format(commits);

                if ($el.hasClass('collapsed')) {
                    $('.compare_select').show();
                    $('.compare_select_hidden').hide();

                    $el.removeClass('collapsed');
                    $el.html(
                        '<i class="icon-minus-squared-alt icon-no-margin"></i>' +
                       collapseMsg);
                }
                else {
                    $('.compare_select').hide();
                    $('.compare_select_hidden').show();
                    $el.addClass('collapsed');
                    $el.html(
                        '<i class="icon-plus-squared-alt icon-no-margin"></i>' +
                        expandMsg);
                }
                updateSticky();
            };

            // get stored diff mode and pre-enable it
            if (templateContext.session_attrs.wide_diff_mode === "true") {
                Rhodecode.comments.toggleWideMode(null);
                $('.toggle-wide-diff').addClass('btn-active');
                updateSticky();
            }

            // DIFF NAV //

            // element to detect scroll direction of
            var $window = $(window);

            // initialize last scroll position
            var lastScrollY = $window.scrollTop();

            $window.on('resize scrollstop', {latency: 350}, function () {
                var visibleChunks = $('.nav-chunk').withinviewport({top: 75});

                // get current scroll position
                var currentScrollY = $window.scrollTop();

                // determine current scroll direction
                if (currentScrollY > lastScrollY) {
                    var y = 'down'
                } else if (currentScrollY !== lastScrollY) {
                    var y = 'up';
                }

                var pos = -1; // by default we use last element in viewport
                if (y === 'down') {
                    pos = -1;
                } else if (y === 'up') {
                    pos = 0;
                }

                if (visibleChunks.length > 0) {
                    $('.nav-chunk').removeClass('selected');
                    $(visibleChunks.get(pos)).addClass('selected');
                }

                // update last scroll position to current position
                lastScrollY = currentScrollY;

            });
            $('#diff_nav').html(diffNavText);

        });
    </script>

</%def>