SoundSoftware Code Site

# Redmine - project management software

# Copyright (C) 2006-2010  Jean-Philippe Lang

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# of the License, or (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

require 'forwardable'

require 'cgi'

module ApplicationHelper

  include Redmine::WikiFormatting::Macros::Definitions

  include Redmine::I18n

  include GravatarHelper::PublicMethods

  extend Forwardable

  def_delegators :wiki_helper, :wikitoolbar_for, :heads_for_wiki_formatter

  # Return true if user is authorized for controller/action, otherwise false

  def authorize_for(controller, action)

    User.current.allowed_to?({:controller => controller, :action => action}, @project)

  end

  # Display a link if user is authorized

  #

  # @param [String] name Anchor text (passed to link_to)

  # @param [Hash] options Hash params. This will checked by authorize_for to see if the user is authorized

  # @param [optional, Hash] html_options Options passed to link_to

  # @param [optional, Hash] parameters_for_method_reference Extra parameters for link_to

  def link_to_if_authorized(name, options = {}, html_options = nil, *parameters_for_method_reference)

    link_to(name, options, html_options, *parameters_for_method_reference) if authorize_for(options[:controller] || params[:controller], options[:action])

  end

  # Display a link to remote if user is authorized

  def link_to_remote_if_authorized(name, options = {}, html_options = nil)

    url = options[:url] || {}

    link_to_remote(name, options, html_options) if authorize_for(url[:controller] || params[:controller], url[:action])

  end

  # Displays a link to user's account page if active

  def link_to_user(user, options={})

    if user.is_a?(User)

      name = h(user.name(options[:format]))

      if user.active?

        link_to(name, :controller => 'users', :action => 'show', :id => user)

      else

        name

      end

    else

      h(user.to_s)

    end

  end

  # Displays a link to +issue+ with its subject.

  # Examples:

  # 

  #   link_to_issue(issue)                        # => Defect #6: This is the subject

  #   link_to_issue(issue, :truncate => 6)        # => Defect #6: This i...

  #   link_to_issue(issue, :subject => false)     # => Defect #6

  #   link_to_issue(issue, :project => true)      # => Foo - Defect #6

  #

  def link_to_issue(issue, options={})

    title = nil

    subject = nil

    if options[:subject] == false

      title = truncate(issue.subject, :length => 60)

    else

      subject = issue.subject

      if options[:truncate]

        subject = truncate(subject, :length => options[:truncate])

      end

    end

    s = link_to "#{issue.tracker} ##{issue.id}", {:controller => "issues", :action => "show", :id => issue}, 

                                                 :class => issue.css_classes,

                                                 :title => title

    s << ": #{h subject}" if subject

    s = "#{h issue.project} - " + s if options[:project]

    s

  end

  # Generates a link to an attachment.

  # Options:

  # * :text - Link text (default to attachment filename)

  # * :download - Force download (default: false)

  def link_to_attachment(attachment, options={})

    text = options.delete(:text) || attachment.filename

    action = options.delete(:download) ? 'download' : 'show'

    link_to(h(text), {:controller => 'attachments', :action => action, :id => attachment, :filename => attachment.filename }, options)

  end

  # Generates a link to a SCM revision

  # Options:

  # * :text - Link text (default to the formatted revision)

  def link_to_revision(revision, project, options={})

    text = options.delete(:text) || format_revision(revision)

    rev = revision.respond_to?(:identifier) ? revision.identifier : revision

    link_to(text, {:controller => 'repositories', :action => 'revision', :id => project, :rev => rev},

            :title => l(:label_revision_id, format_revision(revision)))

  end

  # Generates a link to a project if active

  # Examples:

  # 

  #   link_to_project(project)                          # => link to the specified project overview

  #   link_to_project(project, :action=>'settings')     # => link to project settings

  #   link_to_project(project, {:only_path => false}, :class => "project") # => 3rd arg adds html options

  #   link_to_project(project, {}, :class => "project") # => html options with default url (project overview)

  #

  def link_to_project(project, options={}, html_options = nil)

    if project.active?

      url = {:controller => 'projects', :action => 'show', :id => project}.merge(options)

      link_to(h(project), url, html_options)

    else

      h(project)

    end

  end

  def toggle_link(name, id, options={})

    onclick = "Element.toggle('#{id}'); "

    onclick << (options[:focus] ? "Form.Element.focus('#{options[:focus]}'); " : "this.blur(); ")

    onclick << "return false;"

    link_to(name, "#", :onclick => onclick)

  end

  def image_to_function(name, function, html_options = {})

    html_options.symbolize_keys!

    tag(:input, html_options.merge({

        :type => "image", :src => image_path(name),

        :onclick => (html_options[:onclick] ? "#{html_options[:onclick]}; " : "") + "#{function};"

        }))

  end

  def prompt_to_remote(name, text, param, url, html_options = {})

    html_options[:onclick] = "promptToRemote('#{text}', '#{param}', '#{url_for(url)}'); return false;"

    link_to name, {}, html_options

  end

  def format_activity_title(text)

    h(truncate_single_line(text, :length => 100))

  end

  def format_activity_day(date)

    date == Date.today ? l(:label_today).titleize : format_date(date)

  end

  def format_activity_description(text)

    h(truncate(text.to_s, :length => 120).gsub(%r{[\r\n]*<(pre|code)>.*$}m, '...')).gsub(/[\r\n]+/, "<br />")

  end

  def format_version_name(version)

    if version.project == @project

            h(version)

    else

      h("#{version.project} - #{version}")

    end

  end

  def due_date_distance_in_words(date)

    if date

      l((date < Date.today ? :label_roadmap_overdue : :label_roadmap_due_in), distance_of_date_in_words(Date.today, date))

    end

  end

  def render_page_hierarchy(pages, node=nil)

    content = ''

    if pages[node]

      content << "<ul class=\"pages-hierarchy\">\n"

      pages[node].each do |page|

        content << "<li>"

        content << link_to(h(page.pretty_title), {:controller => 'wiki', :action => 'show', :project_id => page.project, :id => page.title},

                           :title => (page.respond_to?(:updated_on) ? l(:label_updated_time, distance_of_time_in_words(Time.now, page.updated_on)) : nil))

        content << "\n" + render_page_hierarchy(pages, page.id) if pages[page.id]

        content << "</li>\n"

      end

      content << "</ul>\n"

    end

    content

  end

  # Renders flash messages

  def render_flash_messages

    s = ''

    flash.each do |k,v|

      s << content_tag('div', v, :class => "flash #{k}")

    end

    s

  end

  # Renders tabs and their content

  def render_tabs(tabs)

    if tabs.any?

      render :partial => 'common/tabs', :locals => {:tabs => tabs}

    else

      content_tag 'p', l(:label_no_data), :class => "nodata"

    end

  end

  # Renders the project quick-jump box

  def render_project_jump_box

    # Retrieve them now to avoid a COUNT query

    projects = User.current.projects.all

    if projects.any?

      s = '<select onchange="if (this.value != \'\') { window.location = this.value; }">' +

            "<option value=''>#{ l(:label_jump_to_a_project) }</option>" +

            '<option value="" disabled="disabled">---</option>'

      s << project_tree_options_for_select(projects, :selected => @project) do |p|

        { :value => url_for(:controller => 'projects', :action => 'show', :id => p, :jump => current_menu_item) }

      end

      s << '</select>'

      s

    end

  end

  def project_tree_options_for_select(projects, options = {})

    s = ''

    project_tree(projects) do |project, level|

      name_prefix = (level > 0 ? (' ' * 2 * level + '» ') : '')

      tag_options = {:value => project.id}

      if project == options[:selected] || (options[:selected].respond_to?(:include?) && options[:selected].include?(project))

        tag_options[:selected] = 'selected'

      else

        tag_options[:selected] = nil

      end

      tag_options.merge!(yield(project)) if block_given?

      s << content_tag('option', name_prefix + h(project), tag_options)

    end

    s

  end

  # Yields the given block for each project with its level in the tree

  #

  # Wrapper for Project#project_tree

  def project_tree(projects, &block)

    Project.project_tree(projects, &block)

  end

  def project_nested_ul(projects, &block)

    s = ''

    if projects.any?

      ancestors = []

      projects.sort_by(&:lft).each do |project|

        if (ancestors.empty? || project.is_descendant_of?(ancestors.last))

          s << "<ul>\n"

        else

          ancestors.pop

          s << "</li>"

          while (ancestors.any? && !project.is_descendant_of?(ancestors.last)) 

            ancestors.pop

            s << "</ul></li>\n"

          end

        end

        s << "<li>"

        s << yield(project).to_s

        ancestors << project

      end

      s << ("</li></ul>\n" * ancestors.size)

    end

    s

  end

  def principals_check_box_tags(name, principals)

    s = ''

    principals.sort.each do |principal|

      s << "<label>#{ check_box_tag name, principal.id, false } #{link_to_user principal}</label>\n"

    end

    s 

  end

  # Truncates and returns the string as a single line

  def truncate_single_line(string, *args)

    truncate(string.to_s, *args).gsub(%r{[\r\n]+}m, ' ')

  end

  # Truncates at line break after 250 characters or options[:length]

  def truncate_lines(string, options={})

    length = options[:length] || 250

    if string.to_s =~ /\A(.{#{length}}.*?)$/m

      "#{$1}..."

    else

      string

    end

  end

  def html_hours(text)

    text.gsub(%r{(\d+)\.(\d+)}, '<span class="hours hours-int">\1</span><span class="hours hours-dec">.\2</span>')

  end

  def authoring(created, author, options={})

    l(options[:label] || :label_added_time_by, :author => link_to_user(author), :age => time_tag(created))

  end

  def time_tag(time)

    text = distance_of_time_in_words(Time.now, time)

    if @project

      link_to(text, {:controller => 'activities', :action => 'index', :id => @project, :from => time.to_date}, :title => format_time(time))

    else

      content_tag('acronym', text, :title => format_time(time))

    end

  end

  def syntax_highlight(name, content)

    Redmine::SyntaxHighlighting.highlight_by_filename(content, name)

  end

  def to_path_param(path)

    path.to_s.split(%r{[/\\]}).select {|p| !p.blank?}

  end

  def pagination_links_full(paginator, count=nil, options={})

    page_param = options.delete(:page_param) || :page

    per_page_links = options.delete(:per_page_links)

    url_param = params.dup

    # don't reuse query params if filters are present

    url_param.merge!(:fields => nil, :values => nil, :operators => nil) if url_param.delete(:set_filter)

    html = ''

    if paginator.current.previous

      html << link_to_remote_content_update('&#171; ' + l(:label_previous), url_param.merge(page_param => paginator.current.previous)) + ' '

    end

    html << (pagination_links_each(paginator, options) do |n|

      link_to_remote_content_update(n.to_s, url_param.merge(page_param => n))

    end || '')

    if paginator.current.next

      html << ' ' + link_to_remote_content_update((l(:label_next) + ' &#187;'), url_param.merge(page_param => paginator.current.next))

    end

    unless count.nil?

      html << " (#{paginator.current.first_item}-#{paginator.current.last_item}/#{count})"

      if per_page_links != false && links = per_page_links(paginator.items_per_page)

              html << " | #{links}"

      end

    end

    html

  end

  def per_page_links(selected=nil)

    url_param = params.dup

    url_param.clear if url_param.has_key?(:set_filter)

    links = Setting.per_page_options_array.collect do |n|

      n == selected ? n : link_to_remote(n, {:update => "content",

                                             :url => params.dup.merge(:per_page => n),

                                             :method => :get},

                                            {:href => url_for(url_param.merge(:per_page => n))})

    end

    links.size > 1 ? l(:label_display_per_page, links.join(', ')) : nil

  end

  def reorder_links(name, url)

    link_to(image_tag('2uparrow.png',   :alt => l(:label_sort_highest)), url.merge({"#{name}[move_to]" => 'highest'}), :method => :post, :title => l(:label_sort_highest)) +

    link_to(image_tag('1uparrow.png',   :alt => l(:label_sort_higher)),  url.merge({"#{name}[move_to]" => 'higher'}),  :method => :post, :title => l(:label_sort_higher)) +

    link_to(image_tag('1downarrow.png', :alt => l(:label_sort_lower)),   url.merge({"#{name}[move_to]" => 'lower'}),   :method => :post, :title => l(:label_sort_lower)) +

    link_to(image_tag('2downarrow.png', :alt => l(:label_sort_lowest)),  url.merge({"#{name}[move_to]" => 'lowest'}),  :method => :post, :title => l(:label_sort_lowest))

  end

  def breadcrumb(*args)

    elements = args.flatten

    elements.any? ? content_tag('p', args.join(' » ') + ' » ', :class => 'breadcrumb') : nil

  end

  def other_formats_links(&block)

    concat('<p class="other-formats">' + l(:label_export_to))

    yield Redmine::Views::OtherFormatsBuilder.new(self)

    concat('</p>')

  end

  def page_header_title

    if @project.nil? || @project.new_record?

      a = [h(Setting.app_title), '']

    else

      pname = []

      b = []

      ancestors = (@project.root? ? [] : @project.ancestors.visible)

      if ancestors.any?

        root = ancestors.shift

        b << link_to_project(root, {:jump => current_menu_item}, :class => 'root')

        if ancestors.size > 2

          b << '&#8230;' 

          ancestors = ancestors[-2, 2]

        end

        b += ancestors.collect {|p| link_to_project(p, {:jump => current_menu_item}, :class => 'ancestor') }

        b = b.join(' » ')

        b << (' &#187;')

      end

      pname << h(@project)

      a = [pname, b]

    end

  end

  def html_title(*args)

    if args.empty?

      title = []

      title << @project.name if @project

      title += @html_title if @html_title

      title << Setting.app_title

      title.select {|t| !t.blank? }.join(' - ')

    else

      @html_title ||= []

      @html_title += args

    end

  end

  # Returns the theme, controller name, and action as css classes for the

  # HTML body.

  def body_css_classes

    css = []

    if theme = Redmine::Themes.theme(Setting.ui_theme)

      css << 'theme-' + theme.name

    end

    css << 'controller-' + params[:controller]

    css << 'action-' + params[:action]

    css.join(' ')

  end

  def accesskey(s)

    Redmine::AccessKeys.key_for s

  end

  # Formats text according to system settings.

  # 2 ways to call this method:

  # * with a String: textilizable(text, options)

  # * with an object and one of its attribute: textilizable(issue, :description, options)

  def textilizable(*args)

    options = args.last.is_a?(Hash) ? args.pop : {}

    case args.size

    when 1

      obj = options[:object]

      text = args.shift

    when 2

      obj = args.shift

      attr = args.shift

      text = obj.send(attr).to_s

    else

      raise ArgumentError, 'invalid arguments to textilizable'

    end

    return '' if text.blank?

    project = options[:project] || @project || (obj && obj.respond_to?(:project) ? obj.project : nil)

    only_path = options.delete(:only_path) == false ? false : true

    text = Redmine::WikiFormatting.to_html(Setting.text_formatting, text, :object => obj, :attribute => attr) { |macro, args| exec_macro(macro, obj, args) }

    parse_non_pre_blocks(text) do |text|

      [:parse_inline_attachments, :parse_wiki_links, :parse_redmine_links, :parse_headings].each do |method_name|

        send method_name, text, project, obj, attr, only_path, options

      end

    end

  end

  def parse_non_pre_blocks(text)

    s = StringScanner.new(text)

    tags = []

    parsed = ''

    while !s.eos?

      s.scan(/(.*?)(<(\/)?(pre|code)(.*?)>|\z)/im)

      text, full_tag, closing, tag = s[1], s[2], s[3], s[4]

      if tags.empty?

        yield text

      end

      parsed << text

      if tag

        if closing

          if tags.last == tag.downcase

            tags.pop

          end

        else

          tags << tag.downcase

        end

        parsed << full_tag

      end

    end

    # Close any non closing tags

    while tag = tags.pop

      parsed << "</#{tag}>"

    end

    parsed

  end

  def parse_inline_attachments(text, project, obj, attr, only_path, options)

    # when using an image link, try to use an attachment, if possible

    if options[:attachments] || (obj && obj.respond_to?(:attachments))

      attachments = nil

      text.gsub!(/src="([^\/"]+\.(bmp|gif|jpg|jpeg|png))"(\s+alt="([^"]*)")?/i) do |m|

        filename, ext, alt, alttext = $1.downcase, $2, $3, $4 

        attachments ||= (options[:attachments] || obj.attachments).sort_by(&:created_on).reverse

        # search for the picture in attachments

        if found = attachments.detect { |att| att.filename.downcase == filename }

          image_url = url_for :only_path => only_path, :controller => 'attachments', :action => 'download', :id => found

          desc = found.description.to_s.gsub('"', '')

          if !desc.blank? && alttext.blank?

            alt = " title=\"#{desc}\" alt=\"#{desc}\""

          end

          "src=\"#{image_url}\"#{alt}"

        else

          m

        end

      end

    end

  end

  # Wiki links

  #

  # Examples:

  #   [[mypage]]

  #   [[mypage|mytext]]

  # wiki links can refer other project wikis, using project name or identifier:

  #   [[project:]] -> wiki starting page

  #   [[project:|mytext]]

  #   [[project:mypage]]

  #   [[project:mypage|mytext]]

  def parse_wiki_links(text, project, obj, attr, only_path, options)

    text.gsub!(/(!)?(\[\[([^\]\n\|]+)(\|([^\]\n\|]+))?\]\])/) do |m|

      link_project = project

      esc, all, page, title = $1, $2, $3, $5

      if esc.nil?

        if page =~ /^([^\:]+)\:(.*)$/

          link_project = Project.find_by_identifier($1) || Project.find_by_name($1)

          page = $2

          title ||= $1 if page.blank?

        end

        if link_project && link_project.wiki

          # extract anchor

          anchor = nil

          if page =~ /^(.+?)\#(.+)$/

            page, anchor = $1, $2

          end

          # check if page exists

          wiki_page = link_project.wiki.find_page(page)

          url = case options[:wiki_links]

            when :local; "#{title}.html"

            when :anchor; "##{title}"   # used for single-file wiki export

            else

              wiki_page_id = page.present? ? Wiki.titleize(page) : nil

              url_for(:only_path => only_path, :controller => 'wiki', :action => 'show', :project_id => link_project, :id => wiki_page_id, :anchor => anchor)

            end

          link_to((title || page), url, :class => ('wiki-page' + (wiki_page ? '' : ' new')))

        else

          # project or wiki doesn't exist

          all

        end

      else

        all

      end

    end

  end

  # Redmine links

  #

  # Examples:

  #   Issues:

  #     #52 -> Link to issue #52

  #   Changesets:

  #     r52 -> Link to revision 52

  #     commit:a85130f -> Link to scmid starting with a85130f

  #   Documents:

  #     document#17 -> Link to document with id 17

  #     document:Greetings -> Link to the document with title "Greetings"

  #     document:"Some document" -> Link to the document with title "Some document"

  #   Versions:

  #     version#3 -> Link to version with id 3

  #     version:1.0.0 -> Link to version named "1.0.0"

  #     version:"1.0 beta 2" -> Link to version named "1.0 beta 2"

  #   Attachments:

  #     attachment:file.zip -> Link to the attachment of the current object named file.zip

  #   Source files:

  #     source:some/file -> Link to the file located at /some/file in the project's repository

  #     source:some/file@52 -> Link to the file's revision 52

  #     source:some/file#L120 -> Link to line 120 of the file

  #     source:some/file@52#L120 -> Link to line 120 of the file's revision 52

  #     export:some/file -> Force the download of the file

  #  Forum messages:

  #     message#1218 -> Link to message with id 1218

  def parse_redmine_links(text, project, obj, attr, only_path, options)

    text.gsub!(%r{([\s\(,\-\[\>]|^)(!)?(attachment|document|version|commit|source|export|message|project)?((#|r)(\d+)|(:)([^"\s<>][^\s<>]*?|"[^"]+?"))(?=(?=[[:punct:]]\W)|,|\s|\]|<|$)}) do |m|

      leading, esc, prefix, sep, identifier = $1, $2, $3, $5 || $7, $6 || $8

      link = nil

      if esc.nil?

        if prefix.nil? && sep == 'r'

          if project && (changeset = project.changesets.find_by_revision(identifier))

            link = link_to("r#{identifier}", {:only_path => only_path, :controller => 'repositories', :action => 'revision', :id => project, :rev => changeset.revision},

                                      :class => 'changeset',

                                      :title => truncate_single_line(changeset.comments, :length => 100))

          end

        elsif sep == '#'

          oid = identifier.to_i

          case prefix

          when nil

            if issue = Issue.visible.find_by_id(oid, :include => :status)

              link = link_to("##{oid}", {:only_path => only_path, :controller => 'issues', :action => 'show', :id => oid},

                                        :class => issue.css_classes,

                                        :title => "#{truncate(issue.subject, :length => 100)} (#{issue.status.name})")

            end

          when 'document'

            if document = Document.find_by_id(oid, :include => [:project], :conditions => Project.visible_by(User.current))

              link = link_to h(document.title), {:only_path => only_path, :controller => 'documents', :action => 'show', :id => document},

                                                :class => 'document'

            end

          when 'version'

            if version = Version.find_by_id(oid, :include => [:project], :conditions => Project.visible_by(User.current))

              link = link_to h(version.name), {:only_path => only_path, :controller => 'versions', :action => 'show', :id => version},

                                              :class => 'version'

            end

          when 'message'

            if message = Message.find_by_id(oid, :include => [:parent, {:board => :project}], :conditions => Project.visible_by(User.current))

              link = link_to h(truncate(message.subject, :length => 60)), {:only_path => only_path,

                                                                :controller => 'messages',

                                                                :action => 'show',

                                                                :board_id => message.board,

                                                                :id => message.root,

                                                                :anchor => (message.parent ? "message-#{message.id}" : nil)},

                                                 :class => 'message'

            end

          when 'project'

            if p = Project.visible.find_by_id(oid)

              link = link_to_project(p, {:only_path => only_path}, :class => 'project')

            end

          end

        elsif sep == ':'

          # removes the double quotes if any

          name = identifier.gsub(%r{^"(.*)"$}, "\\1")

          case prefix

          when 'document'

            if project && document = project.documents.find_by_title(name)

              link = link_to h(document.title), {:only_path => only_path, :controller => 'documents', :action => 'show', :id => document},

                                                :class => 'document'

            end

          when 'version'

            if project && version = project.versions.find_by_name(name)

              link = link_to h(version.name), {:only_path => only_path, :controller => 'versions', :action => 'show', :id => version},

                                              :class => 'version'

            end

          when 'commit'

            if project && (changeset = project.changesets.find(:first, :conditions => ["scmid LIKE ?", "#{name}%"]))

              link = link_to h("#{name}"), {:only_path => only_path, :controller => 'repositories', :action => 'revision', :id => project, :rev => changeset.identifier},

                                           :class => 'changeset',

                                           :title => truncate_single_line(changeset.comments, :length => 100)

            end

          when 'source', 'export'

            if project && project.repository

              name =~ %r{^[/\\]*(.*?)(@([0-9a-f]+))?(#(L\d+))?$}

              path, rev, anchor = $1, $3, $5

              link = link_to h("#{prefix}:#{name}"), {:controller => 'repositories', :action => 'entry', :id => project,

                                                      :path => to_path_param(path),

                                                      :rev => rev,

                                                      :anchor => anchor,

                                                      :format => (prefix == 'export' ? 'raw' : nil)},

                                                     :class => (prefix == 'export' ? 'source download' : 'source')

            end

          when 'attachment'

            attachments = options[:attachments] || (obj && obj.respond_to?(:attachments) ? obj.attachments : nil)

            if attachments && attachment = attachments.detect {|a| a.filename == name }

              link = link_to h(attachment.filename), {:only_path => only_path, :controller => 'attachments', :action => 'download', :id => attachment},

                                                     :class => 'attachment'

            end

          when 'project'

            if p = Project.visible.find(:first, :conditions => ["identifier = :s OR LOWER(name) = :s", {:s => name.downcase}])

              link = link_to_project(p, {:only_path => only_path}, :class => 'project')

            end

          end

        end

      end

      leading + (link || "#{prefix}#{sep}#{identifier}")

    end

  end

  TOC_RE = /<p>\{\{([<>]?)toc\}\}<\/p>/i unless const_defined?(:TOC_RE)

  HEADING_RE = /<h(1|2|3|4)( [^>]+)?>(.+?)<\/h(1|2|3|4)>/i unless const_defined?(:HEADING_RE)

  # Headings and TOC

  # Adds ids and links to headings and renders the TOC if needed unless options[:headings] is set to false

  def parse_headings(text, project, obj, attr, only_path, options)

    headings = []

    text.gsub!(HEADING_RE) do

      level, attrs, content = $1.to_i, $2, $3

      item = strip_tags(content).strip

      anchor = item.gsub(%r{[^\w\s\-]}, '').gsub(%r{\s+(\-+\s*)?}, '-')

      headings << [level, anchor, item]

      "<h#{level} #{attrs} id=\"#{anchor}\">#{content}<a href=\"##{anchor}\" class=\"wiki-anchor\">&para;</a></h#{level}>"

    end unless options[:headings] == false

    text.gsub!(TOC_RE) do

      if headings.empty?

        ''

      else

        div_class = 'toc'

        div_class << ' right' if $1 == '>'

        div_class << ' left' if $1 == '<'

        out = "<ul class=\"#{div_class}\"><li>"

        root = headings.map(&:first).min

        current = root

        started = false

        headings.each do |level, anchor, item|

          if level > current

            out << '<ul><li>' * (level - current)

          elsif level < current

            out << "</li></ul>\n" * (current - level) + "</li><li>"

          elsif started

            out << '</li><li>'

          end

          out << "<a href=\"##{anchor}\">#{item}</a>"

          current = level

          started = true

        end

        out << '</li></ul>' * (current - root)

        out << '</li></ul>'

      end

    end

  end

  # Same as Rails' simple_format helper without using paragraphs

  def simple_format_without_paragraph(text)

    text.to_s.

      gsub(/\r\n?/, "\n").                    # \r\n and \r -> \n

      gsub(/\n\n+/, "<br /><br />").          # 2+ newline  -> 2 br

      gsub(/([^\n]\n)(?=[^\n])/, '\1<br />')  # 1 newline   -> br

  end

  def lang_options_for_select(blank=true)

    (blank ? [["(auto)", ""]] : []) +

      valid_languages.collect{|lang| [ ll(lang.to_s, :general_lang_name), lang.to_s]}.sort{|x,y| x.last <=> y.last }

  end

  def label_tag_for(name, option_tags = nil, options = {})

    label_text = l(("field_"+field.to_s.gsub(/\_id$/, "")).to_sym) + (options.delete(:required) ? @template.content_tag("span", " *", :class => "required"): "")

    content_tag("label", label_text)

  end

  def labelled_tabular_form_for(name, object, options, &proc)

    options[:html] ||= {}

    options[:html][:class] = 'tabular' unless options[:html].has_key?(:class)

    form_for(name, object, options.merge({ :builder => TabularFormBuilder, :lang => current_language}), &proc)

  end

  def back_url_hidden_field_tag

    back_url = params[:back_url] || request.env['HTTP_REFERER']

    back_url = CGI.unescape(back_url.to_s)

    hidden_field_tag('back_url', CGI.escape(back_url)) unless back_url.blank?

  end

  def check_all_links(form_name)

    link_to_function(l(:button_check_all), "checkAll('#{form_name}', true)") +

    " | " +

    link_to_function(l(:button_uncheck_all), "checkAll('#{form_name}', false)")

  end

  def progress_bar(pcts, options={})

    pcts = [pcts, pcts] unless pcts.is_a?(Array)

    pcts = pcts.collect(&:round)

    pcts[1] = pcts[1] - pcts[0]

    pcts << (100 - pcts[1] - pcts[0])

    width = options[:width] || '100px;'

    legend = options[:legend] || ''

    content_tag('table',

      content_tag('tr',

        (pcts[0] > 0 ? content_tag('td', '', :style => "width: #{pcts[0]}%;", :class => 'closed') : '') +

        (pcts[1] > 0 ? content_tag('td', '', :style => "width: #{pcts[1]}%;", :class => 'done') : '') +

        (pcts[2] > 0 ? content_tag('td', '', :style => "width: #{pcts[2]}%;", :class => 'todo') : '')

      ), :class => 'progress', :style => "width: #{width};") +

      content_tag('p', legend, :class => 'pourcent')

  end

  def checked_image(checked=true)

    if checked

      image_tag 'toggle_check.png'

    end

  end

  def context_menu(url)

    unless @context_menu_included

      content_for :header_tags do

        javascript_include_tag('context_menu') +

          stylesheet_link_tag('context_menu')

      end

      if l(:direction) == 'rtl'

        content_for :header_tags do

          stylesheet_link_tag('context_menu_rtl')

        end

      end

      @context_menu_included = true

    end

    javascript_tag "new ContextMenu('#{ url_for(url) }')"

  end

  def context_menu_link(name, url, options={})

    options[:class] ||= ''

    if options.delete(:selected)

      options[:class] << ' icon-checked disabled'

      options[:disabled] = true

    end

    if options.delete(:disabled)

      options.delete(:method)

      options.delete(:confirm)

      options.delete(:onclick)

      options[:class] << ' disabled'

      url = '#'

    end

    link_to name, url, options

  end

  def calendar_for(field_id)

    include_calendar_headers_tags

    image_tag("calendar.png", {:id => "#{field_id}_trigger",:class => "calendar-trigger"}) +

    javascript_tag("Calendar.setup({inputField : '#{field_id}', ifFormat : '%Y-%m-%d', button : '#{field_id}_trigger' });")

  end

  def include_calendar_headers_tags

    unless @calendar_headers_tags_included

      @calendar_headers_tags_included = true

      content_for :header_tags do

        start_of_week = case Setting.start_of_week.to_i

        when 1

          'Calendar._FD = 1;' # Monday

        when 7

          'Calendar._FD = 0;' # Sunday

        else

          '' # use language

        end

        javascript_include_tag('calendar/calendar') +

        javascript_include_tag("calendar/lang/calendar-#{current_language.to_s.downcase}.js") +

        javascript_tag(start_of_week) +  

        javascript_include_tag('calendar/calendar-setup') +

        stylesheet_link_tag('calendar')

      end

    end

  end

  def content_for(name, content = nil, &block)

    @has_content ||= {}

    @has_content[name] = true

    super(name, content, &block)

  end

  def has_content?(name)

    (@has_content && @has_content[name]) || false

  end

  # Returns the avatar image tag for the given +user+ if avatars are enabled

  # +user+ can be a User or a string that will be scanned for an email address (eg. 'joe <joe@foo.bar>')

  def avatar(user, options = { })

    if Setting.gravatar_enabled?

      options.merge!({:ssl => (defined?(request) && request.ssl?), :default => Setting.gravatar_default})

      email = nil

      if user.respond_to?(:mail)

        email = user.mail

      elsif user.to_s =~ %r{<(.+?)>}

        email = $1

      end

      return gravatar(email.to_s.downcase, options) unless email.blank? rescue nil

    else

      ''

    end

  end

  def favicon

    "<link rel='shortcut icon' href='#{image_path('/favicon.ico')}' />"

  end

  private

  def wiki_helper

    helper = Redmine::WikiFormatting.helper_for(Setting.text_formatting)

    extend helper

    return self

  end

  def link_to_remote_content_update(text, url_params)

    link_to_remote(text,

      {:url => url_params, :method => :get, :update => 'content', :complete => 'window.scrollTo(0,0)'},

      {:href => url_for(:params => url_params)}

    )

  end

end