view lib/redmine/helpers/gantt.rb @ 1082:997f6d7738f7 bug_531

In repo controller entry action, show the page for the file even if it's binary (so user still has access to history etc links). This makes it possible to use the entry action as the default when a file is clicked on

# Redmine - project management software
# Copyright (C) 2006-2011  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.

module Redmine
  module Helpers
    # Simple class to handle gantt chart data
    class Gantt
      include ERB::Util
      include Redmine::I18n

      # :nodoc:
      # Some utility methods for the PDF export
      class PDF
        MaxCharactorsForSubject = 45
        TotalWidth = 280
        LeftPaneWidth = 100

        def self.right_pane_width
          TotalWidth - LeftPaneWidth
        end
      end

      attr_reader :year_from, :month_from, :date_from, :date_to, :zoom, :months, :truncated, :max_rows
      attr_accessor :query
      attr_accessor :project
      attr_accessor :view

      def initialize(options={})
        options = options.dup

        if options[:year] && options[:year].to_i >0
          @year_from = options[:year].to_i
          if options[:month] && options[:month].to_i >=1 && options[:month].to_i <= 12
            @month_from = options[:month].to_i
          else
            @month_from = 1
          end
        else
          @month_from ||= Date.today.month
          @year_from ||= Date.today.year
        end

        zoom = (options[:zoom] || User.current.pref[:gantt_zoom]).to_i
        @zoom = (zoom > 0 && zoom < 5) ? zoom : 2
        months = (options[:months] || User.current.pref[:gantt_months]).to_i
        @months = (months > 0 && months < 25) ? months : 6

        # Save gantt parameters as user preference (zoom and months count)
        if (User.current.logged? && (@zoom != User.current.pref[:gantt_zoom] || @months != User.current.pref[:gantt_months]))
          User.current.pref[:gantt_zoom], User.current.pref[:gantt_months] = @zoom, @months
          User.current.preference.save
        end

        @date_from = Date.civil(@year_from, @month_from, 1)
        @date_to = (@date_from >> @months) - 1

        @subjects = ''
        @lines = ''
        @number_of_rows = nil

        @issue_ancestors = []

        @truncated = false
        if options.has_key?(:max_rows)
          @max_rows = options[:max_rows]
        else
          @max_rows = Setting.gantt_items_limit.blank? ? nil : Setting.gantt_items_limit.to_i
        end
      end

      def common_params
        { :controller => 'gantts', :action => 'show', :project_id => @project }
      end

      def params
        common_params.merge({  :zoom => zoom, :year => year_from, :month => month_from, :months => months })
      end

      def params_previous
        common_params.merge({:year => (date_from << months).year, :month => (date_from << months).month, :zoom => zoom, :months => months })
      end

      def params_next
        common_params.merge({:year => (date_from >> months).year, :month => (date_from >> months).month, :zoom => zoom, :months => months })
      end

      # Returns the number of rows that will be rendered on the Gantt chart
      def number_of_rows
        return @number_of_rows if @number_of_rows

        rows = projects.inject(0) {|total, p| total += number_of_rows_on_project(p)}
        rows > @max_rows ? @max_rows : rows
      end

      # Returns the number of rows that will be used to list a project on
      # the Gantt chart.  This will recurse for each subproject.
      def number_of_rows_on_project(project)
        return 0 unless projects.include?(project)

        count = 1
        count += project_issues(project).size
        count += project_versions(project).size
        count
      end

      # Renders the subjects of the Gantt chart, the left side.
      def subjects(options={})
        render(options.merge(:only => :subjects)) unless @subjects_rendered
        @subjects
      end

      # Renders the lines of the Gantt chart, the right side
      def lines(options={})
        render(options.merge(:only => :lines)) unless @lines_rendered
        @lines
      end

      # Returns issues that will be rendered
      def issues
        @issues ||= @query.issues(
          :include => [:assigned_to, :tracker, :priority, :category, :fixed_version],
          :order => "#{Project.table_name}.lft ASC, #{Issue.table_name}.id ASC",
          :limit => @max_rows
        )
      end

      # Return all the project nodes that will be displayed
      def projects
        return @projects if @projects

        ids = issues.collect(&:project).uniq.collect(&:id)
        if ids.any?
          # All issues projects and their visible ancestors
          @projects = Project.visible.all(
            :joins => "LEFT JOIN #{Project.table_name} child ON #{Project.table_name}.lft <= child.lft AND #{Project.table_name}.rgt >= child.rgt",
            :conditions => ["child.id IN (?)", ids],
            :order => "#{Project.table_name}.lft ASC"
          ).uniq
        else
          @projects = []
        end
      end

      # Returns the issues that belong to +project+
      def project_issues(project)
        @issues_by_project ||= issues.group_by(&:project)
        @issues_by_project[project] || []
      end

      # Returns the distinct versions of the issues that belong to +project+
      def project_versions(project)
        project_issues(project).collect(&:fixed_version).compact.uniq
      end

      # Returns the issues that belong to +project+ and are assigned to +version+
      def version_issues(project, version)
        project_issues(project).select {|issue| issue.fixed_version == version}
      end

      def render(options={})
        options = {:top => 0, :top_increment => 20, :indent_increment => 20, :render => :subject, :format => :html}.merge(options)
        indent = options[:indent] || 4

        @subjects = '' unless options[:only] == :lines
        @lines = '' unless options[:only] == :subjects
        @number_of_rows = 0

        Project.project_tree(projects) do |project, level|
          options[:indent] = indent + level * options[:indent_increment]
          render_project(project, options)
          break if abort?
        end

        @subjects_rendered = true unless options[:only] == :lines
        @lines_rendered = true unless options[:only] == :subjects

        render_end(options)
      end

      def render_project(project, options={})
        subject_for_project(project, options) unless options[:only] == :lines
        line_for_project(project, options) unless options[:only] == :subjects

        options[:top] += options[:top_increment]
        options[:indent] += options[:indent_increment]
        @number_of_rows += 1
        return if abort?

        issues = project_issues(project).select {|i| i.fixed_version.nil?}
        sort_issues!(issues)
        if issues
          render_issues(issues, options)
          return if abort?
        end

        versions = project_versions(project)
        versions.each do |version|
          render_version(project, version, options)
        end

        # Remove indent to hit the next sibling
        options[:indent] -= options[:indent_increment]
      end

      def render_issues(issues, options={})
        @issue_ancestors = []

        issues.each do |i|
          subject_for_issue(i, options) unless options[:only] == :lines
          line_for_issue(i, options) unless options[:only] == :subjects

          options[:top] += options[:top_increment]
          @number_of_rows += 1
          break if abort?
        end

        options[:indent] -= (options[:indent_increment] * @issue_ancestors.size)
      end

      def render_version(project, version, options={})
        # Version header
        subject_for_version(version, options) unless options[:only] == :lines
        line_for_version(version, options) unless options[:only] == :subjects

        options[:top] += options[:top_increment]
        @number_of_rows += 1
        return if abort?

        issues = version_issues(project, version)
        if issues
          sort_issues!(issues)
          # Indent issues
          options[:indent] += options[:indent_increment]
          render_issues(issues, options)
          options[:indent] -= options[:indent_increment]
        end
      end

      def render_end(options={})
        case options[:format]
        when :pdf
          options[:pdf].Line(15, options[:top], PDF::TotalWidth, options[:top])
        end
      end

      def subject_for_project(project, options)
        case options[:format]
        when :html
          subject = "<span class='icon icon-projects #{project.overdue? ? 'project-overdue' : ''}'>".html_safe
          subject << view.link_to_project(project).html_safe
          subject << '</span>'.html_safe
          html_subject(options, subject, :css => "project-name")
        when :image
          image_subject(options, project.name)
        when :pdf
          pdf_new_page?(options)
          pdf_subject(options, project.name)
        end
      end

      def line_for_project(project, options)
        # Skip versions that don't have a start_date or due date
        if project.is_a?(Project) && project.start_date && project.due_date
          options[:zoom] ||= 1
          options[:g_width] ||= (self.date_to - self.date_from + 1) * options[:zoom]

          coords = coordinates(project.start_date, project.due_date, nil, options[:zoom])
          label = h(project)

          case options[:format]
          when :html
            html_task(options, coords, :css => "project task", :label => label, :markers => true)
          when :image
            image_task(options, coords, :label => label, :markers => true, :height => 3)
          when :pdf
            pdf_task(options, coords, :label => label, :markers => true, :height => 0.8)
          end
        else
          ActiveRecord::Base.logger.debug "Gantt#line_for_project was not given a project with a start_date"
          ''
        end
      end

      def subject_for_version(version, options)
        case options[:format]
        when :html
          subject = "<span class='icon icon-package #{version.behind_schedule? ? 'version-behind-schedule' : ''} #{version.overdue? ? 'version-overdue' : ''}'>".html_safe
          subject << view.link_to_version(version).html_safe
          subject << '</span>'.html_safe
          html_subject(options, subject, :css => "version-name")
        when :image
          image_subject(options, version.to_s_with_project)
        when :pdf
          pdf_new_page?(options)
          pdf_subject(options, version.to_s_with_project)
        end
      end

      def line_for_version(version, options)
        # Skip versions that don't have a start_date
        if version.is_a?(Version) && version.start_date && version.due_date
          options[:zoom] ||= 1
          options[:g_width] ||= (self.date_to - self.date_from + 1) * options[:zoom]

          coords = coordinates(version.start_date, version.due_date, version.completed_pourcent, options[:zoom])
          label = "#{h version } #{h version.completed_pourcent.to_i.to_s}%"
          label = h("#{version.project} -") + label unless @project && @project == version.project

          case options[:format]
          when :html
            html_task(options, coords, :css => "version task", :label => label, :markers => true)
          when :image
            image_task(options, coords, :label => label, :markers => true, :height => 3)
          when :pdf
            pdf_task(options, coords, :label => label, :markers => true, :height => 0.8)
          end
        else
          ActiveRecord::Base.logger.debug "Gantt#line_for_version was not given a version with a start_date"
          ''
        end
      end

      def subject_for_issue(issue, options)
        while @issue_ancestors.any? && !issue.is_descendant_of?(@issue_ancestors.last)
          @issue_ancestors.pop
          options[:indent] -= options[:indent_increment]
        end

        output = case options[:format]
        when :html
          css_classes = ''
          css_classes << ' issue-overdue' if issue.overdue?
          css_classes << ' issue-behind-schedule' if issue.behind_schedule?
          css_classes << ' icon icon-issue' unless Setting.gravatar_enabled? && issue.assigned_to

          subject = "<span class='#{css_classes}'>".html_safe
          if issue.assigned_to.present?
            assigned_string = l(:field_assigned_to) + ": " + issue.assigned_to.name
            subject << view.avatar(issue.assigned_to, :class => 'gravatar icon-gravatar', :size => 10, :title => assigned_string).to_s.html_safe
          end
          subject << view.link_to_issue(issue).html_safe
          subject << '</span>'.html_safe
          html_subject(options, subject, :css => "issue-subject", :title => issue.subject) + "\n"
        when :image
          image_subject(options, issue.subject)
        when :pdf
          pdf_new_page?(options)
          pdf_subject(options, issue.subject)
        end

        unless issue.leaf?
          @issue_ancestors << issue
          options[:indent] += options[:indent_increment]
        end

        output
      end

      def line_for_issue(issue, options)
        # Skip issues that don't have a due_before (due_date or version's due_date)
        if issue.is_a?(Issue) && issue.due_before
          coords = coordinates(issue.start_date, issue.due_before, issue.done_ratio, options[:zoom])
          label = "#{ issue.status.name } #{ issue.done_ratio }%"

          case options[:format]
          when :html
            html_task(options, coords, :css => "task " + (issue.leaf? ? 'leaf' : 'parent'), :label => label, :issue => issue, :markers => !issue.leaf?)
          when :image
            image_task(options, coords, :label => label)
          when :pdf
            pdf_task(options, coords, :label => label)
        end
        else
          ActiveRecord::Base.logger.debug "GanttHelper#line_for_issue was not given an issue with a due_before"
          ''
        end
      end

      # Generates a gantt image
      # Only defined if RMagick is avalaible
      def to_image(format='PNG')
        date_to = (@date_from >> @months)-1
        show_weeks = @zoom > 1
        show_days = @zoom > 2

        subject_width = 400
        header_height = 18
        # width of one day in pixels
        zoom = @zoom*2
        g_width = (@date_to - @date_from + 1)*zoom
        g_height = 20 * number_of_rows + 30
        headers_height = (show_weeks ? 2*header_height : header_height)
        height = g_height + headers_height

        imgl = Magick::ImageList.new
        imgl.new_image(subject_width+g_width+1, height)
        gc = Magick::Draw.new

        # Subjects
        gc.stroke('transparent')
        subjects(:image => gc, :top => (headers_height + 20), :indent => 4, :format => :image)

        # Months headers
        month_f = @date_from
        left = subject_width
        @months.times do
          width = ((month_f >> 1) - month_f) * zoom
          gc.fill('white')
          gc.stroke('grey')
          gc.stroke_width(1)
          gc.rectangle(left, 0, left + width, height)
          gc.fill('black')
          gc.stroke('transparent')
          gc.stroke_width(1)
          gc.text(left.round + 8, 14, "#{month_f.year}-#{month_f.month}")
          left = left + width
          month_f = month_f >> 1
        end

        # Weeks headers
        if show_weeks
        	left = subject_width
        	height = header_height
        	if @date_from.cwday == 1
        	    # date_from is monday
                week_f = date_from
        	else
        	    # find next monday after date_from
        		week_f = @date_from + (7 - @date_from.cwday + 1)
        		width = (7 - @date_from.cwday + 1) * zoom
                gc.fill('white')
                gc.stroke('grey')
                gc.stroke_width(1)
                gc.rectangle(left, header_height, left + width, 2*header_height + g_height-1)
        		left = left + width
        	end
        	while week_f <= date_to
        		width = (week_f + 6 <= date_to) ? 7 * zoom : (date_to - week_f + 1) * zoom
                gc.fill('white')
                gc.stroke('grey')
                gc.stroke_width(1)
                gc.rectangle(left.round, header_height, left.round + width, 2*header_height + g_height-1)
                gc.fill('black')
                gc.stroke('transparent')
                gc.stroke_width(1)
                gc.text(left.round + 2, header_height + 14, week_f.cweek.to_s)
        		left = left + width
        		week_f = week_f+7
        	end
        end

        # Days details (week-end in grey)
        if show_days
        	left = subject_width
        	height = g_height + header_height - 1
        	wday = @date_from.cwday
        	(date_to - @date_from + 1).to_i.times do
              width =  zoom
              gc.fill(wday == 6 || wday == 7 ? '#eee' : 'white')
              gc.stroke('#ddd')
              gc.stroke_width(1)
              gc.rectangle(left, 2*header_height, left + width, 2*header_height + g_height-1)
              left = left + width
              wday = wday + 1
              wday = 1 if wday > 7
        	end
        end

        # border
        gc.fill('transparent')
        gc.stroke('grey')
        gc.stroke_width(1)
        gc.rectangle(0, 0, subject_width+g_width, headers_height)
        gc.stroke('black')
        gc.rectangle(0, 0, subject_width+g_width, g_height+ headers_height-1)

        # content
        top = headers_height + 20

        gc.stroke('transparent')
        lines(:image => gc, :top => top, :zoom => zoom, :subject_width => subject_width, :format => :image)

        # today red line
        if Date.today >= @date_from and Date.today <= date_to
          gc.stroke('red')
          x = (Date.today-@date_from+1)*zoom + subject_width
          gc.line(x, headers_height, x, headers_height + g_height-1)
        end

        gc.draw(imgl)
        imgl.format = format
        imgl.to_blob
      end if Object.const_defined?(:Magick)

      def to_pdf
        pdf = ::Redmine::Export::PDF::ITCPDF.new(current_language)
        pdf.SetTitle("#{l(:label_gantt)} #{project}")
        pdf.alias_nb_pages
        pdf.footer_date = format_date(Date.today)
        pdf.AddPage("L")
        pdf.SetFontStyle('B',12)
        pdf.SetX(15)
        pdf.RDMCell(PDF::LeftPaneWidth, 20, project.to_s)
        pdf.Ln
        pdf.SetFontStyle('B',9)

        subject_width = PDF::LeftPaneWidth
        header_height = 5

        headers_height = header_height
        show_weeks = false
        show_days = false

        if self.months < 7
          show_weeks = true
          headers_height = 2*header_height
          if self.months < 3
            show_days = true
            headers_height = 3*header_height
          end
        end

        g_width = PDF.right_pane_width
        zoom = (g_width) / (self.date_to - self.date_from + 1)
        g_height = 120
        t_height = g_height + headers_height

        y_start = pdf.GetY

        # Months headers
        month_f = self.date_from
        left = subject_width
        height = header_height
        self.months.times do
          width = ((month_f >> 1) - month_f) * zoom
          pdf.SetY(y_start)
          pdf.SetX(left)
          pdf.RDMCell(width, height, "#{month_f.year}-#{month_f.month}", "LTR", 0, "C")
          left = left + width
          month_f = month_f >> 1
        end

        # Weeks headers
        if show_weeks
          left = subject_width
          height = header_height
          if self.date_from.cwday == 1
            # self.date_from is monday
            week_f = self.date_from
          else
            # find next monday after self.date_from
            week_f = self.date_from + (7 - self.date_from.cwday + 1)
            width = (7 - self.date_from.cwday + 1) * zoom-1
            pdf.SetY(y_start + header_height)
            pdf.SetX(left)
            pdf.RDMCell(width + 1, height, "", "LTR")
            left = left + width+1
          end
          while week_f <= self.date_to
            width = (week_f + 6 <= self.date_to) ? 7 * zoom : (self.date_to - week_f + 1) * zoom
            pdf.SetY(y_start + header_height)
            pdf.SetX(left)
            pdf.RDMCell(width, height, (width >= 5 ? week_f.cweek.to_s : ""), "LTR", 0, "C")
            left = left + width
            week_f = week_f+7
          end
        end

        # Days headers
        if show_days
          left = subject_width
          height = header_height
          wday = self.date_from.cwday
          pdf.SetFontStyle('B',7)
          (self.date_to - self.date_from + 1).to_i.times do
            width = zoom
            pdf.SetY(y_start + 2 * header_height)
            pdf.SetX(left)
            pdf.RDMCell(width, height, day_name(wday).first, "LTR", 0, "C")
            left = left + width
            wday = wday + 1
            wday = 1 if wday > 7
          end
        end

        pdf.SetY(y_start)
        pdf.SetX(15)
        pdf.RDMCell(subject_width+g_width-15, headers_height, "", 1)

        # Tasks
        top = headers_height + y_start
        options = {
          :top => top,
          :zoom => zoom,
          :subject_width => subject_width,
          :g_width => g_width,
          :indent => 0,
          :indent_increment => 5,
          :top_increment => 5,
          :format => :pdf,
          :pdf => pdf
        }
        render(options)
        pdf.Output
      end

      private

      def coordinates(start_date, end_date, progress, zoom=nil)
        zoom ||= @zoom

        coords = {}
        if start_date && end_date && start_date < self.date_to && end_date > self.date_from
          if start_date > self.date_from
            coords[:start] = start_date - self.date_from
            coords[:bar_start] = start_date - self.date_from
          else
            coords[:bar_start] = 0
          end
          if end_date < self.date_to
            coords[:end] = end_date - self.date_from
            coords[:bar_end] = end_date - self.date_from + 1
          else
            coords[:bar_end] = self.date_to - self.date_from + 1
          end

          if progress
            progress_date = start_date + (end_date - start_date + 1) * (progress / 100.0)
            if progress_date > self.date_from && progress_date > start_date
              if progress_date < self.date_to
                coords[:bar_progress_end] = progress_date - self.date_from
              else
                coords[:bar_progress_end] = self.date_to - self.date_from + 1
              end
            end

            if progress_date < Date.today
              late_date = [Date.today, end_date].min
              if late_date > self.date_from && late_date > start_date
                if late_date < self.date_to
                  coords[:bar_late_end] = late_date - self.date_from + 1
                else
                  coords[:bar_late_end] = self.date_to - self.date_from + 1
                end
              end
            end
          end
        end

        # Transforms dates into pixels witdh
        coords.keys.each do |key|
          coords[key] = (coords[key] * zoom).floor
        end
        coords
      end

      # Sorts a collection of issues by start_date, due_date, id for gantt rendering
      def sort_issues!(issues)
        issues.sort! { |a, b| gantt_issue_compare(a, b, issues) }
      end

      # TODO: top level issues should be sorted by start date
      def gantt_issue_compare(x, y, issues)
        if x.root_id == y.root_id
          x.lft <=> y.lft
        else
          x.root_id <=> y.root_id
        end
      end

      def current_limit
        if @max_rows
          @max_rows - @number_of_rows
        else
          nil
        end
      end

      def abort?
        if @max_rows && @number_of_rows >= @max_rows
          @truncated = true
        end
      end

      def pdf_new_page?(options)
        if options[:top] > 180
          options[:pdf].Line(15, options[:top], PDF::TotalWidth, options[:top])
          options[:pdf].AddPage("L")
          options[:top] = 15
          options[:pdf].Line(15, options[:top] - 0.1, PDF::TotalWidth, options[:top] - 0.1)
        end
      end

      def html_subject(params, subject, options={})
        style = "position: absolute;top:#{params[:top]}px;left:#{params[:indent]}px;"
        style << "width:#{params[:subject_width] - params[:indent]}px;" if params[:subject_width]

        output = view.content_tag 'div', subject, :class => options[:css], :style => style, :title => options[:title]
        @subjects << output
        output
      end

      def pdf_subject(params, subject, options={})
        params[:pdf].SetY(params[:top])
        params[:pdf].SetX(15)

        char_limit = PDF::MaxCharactorsForSubject - params[:indent]
        params[:pdf].RDMCell(params[:subject_width]-15, 5, (" " * params[:indent]) +  subject.to_s.sub(/^(.{#{char_limit}}[^\s]*\s).*$/, '\1 (...)'), "LR")

        params[:pdf].SetY(params[:top])
        params[:pdf].SetX(params[:subject_width])
        params[:pdf].RDMCell(params[:g_width], 5, "", "LR")
      end

      def image_subject(params, subject, options={})
        params[:image].fill('black')
        params[:image].stroke('transparent')
        params[:image].stroke_width(1)
        params[:image].text(params[:indent], params[:top] + 2, subject)
      end

      def html_task(params, coords, options={})
        output = ''
        # Renders the task bar, with progress and late
        if coords[:bar_start] && coords[:bar_end]
          output << "<div style='top:#{ params[:top] }px;left:#{ coords[:bar_start] }px;width:#{ coords[:bar_end] - coords[:bar_start] - 2}px;' class='#{options[:css]} task_todo'>&nbsp;</div>".html_safe

          if coords[:bar_late_end]
            output << "<div style='top:#{ params[:top] }px;left:#{ coords[:bar_start] }px;width:#{ coords[:bar_late_end] - coords[:bar_start] - 2}px;' class='#{options[:css]} task_late'>&nbsp;</div>".html_safe
          end
          if coords[:bar_progress_end]
            output << "<div style='top:#{ params[:top] }px;left:#{ coords[:bar_start] }px;width:#{ coords[:bar_progress_end] - coords[:bar_start] - 2}px;' class='#{options[:css]} task_done'>&nbsp;</div>".html_safe
          end
        end
        # Renders the markers
        if options[:markers]
          if coords[:start]
            output << "<div style='top:#{ params[:top] }px;left:#{ coords[:start] }px;width:15px;' class='#{options[:css]} marker starting'>&nbsp;</div>".html_safe
          end
          if coords[:end]
            output << "<div style='top:#{ params[:top] }px;left:#{ coords[:end] + params[:zoom] }px;width:15px;' class='#{options[:css]} marker ending'>&nbsp;</div>".html_safe
          end
        end
        # Renders the label on the right
        if options[:label]
          output << "<div style='top:#{ params[:top] }px;left:#{ (coords[:bar_end] || 0) + 8 }px;' class='#{options[:css]} label'>".html_safe
          output << options[:label]
          output << "</div>".html_safe
        end
        # Renders the tooltip
        if options[:issue] && coords[:bar_start] && coords[:bar_end]
          output << "<div class='tooltip' style='position: absolute;top:#{ params[:top] }px;left:#{ coords[:bar_start] }px;width:#{ coords[:bar_end] - coords[:bar_start] }px;height:12px;'>".html_safe
          output << '<span class="tip">'.html_safe
          output << view.render_issue_tooltip(options[:issue]).html_safe
          output << "</span></div>".html_safe
        end
        @lines << output
        output
      end

      def pdf_task(params, coords, options={})
        height = options[:height] || 2

        # Renders the task bar, with progress and late
        if coords[:bar_start] && coords[:bar_end]
          params[:pdf].SetY(params[:top]+1.5)
          params[:pdf].SetX(params[:subject_width] + coords[:bar_start])
          params[:pdf].SetFillColor(200,200,200)
          params[:pdf].RDMCell(coords[:bar_end] - coords[:bar_start], height, "", 0, 0, "", 1)

          if coords[:bar_late_end]
            params[:pdf].SetY(params[:top]+1.5)
            params[:pdf].SetX(params[:subject_width] + coords[:bar_start])
            params[:pdf].SetFillColor(255,100,100)
            params[:pdf].RDMCell(coords[:bar_late_end] - coords[:bar_start], height, "", 0, 0, "", 1)
          end
          if coords[:bar_progress_end]
            params[:pdf].SetY(params[:top]+1.5)
            params[:pdf].SetX(params[:subject_width] + coords[:bar_start])
            params[:pdf].SetFillColor(90,200,90)
            params[:pdf].RDMCell(coords[:bar_progress_end] - coords[:bar_start], height, "", 0, 0, "", 1)
          end
        end
        # Renders the markers
        if options[:markers]
          if coords[:start]
            params[:pdf].SetY(params[:top] + 1)
            params[:pdf].SetX(params[:subject_width] + coords[:start] - 1)
            params[:pdf].SetFillColor(50,50,200)
            params[:pdf].RDMCell(2, 2, "", 0, 0, "", 1)
          end
          if coords[:end]
            params[:pdf].SetY(params[:top] + 1)
            params[:pdf].SetX(params[:subject_width] + coords[:end] - 1)
            params[:pdf].SetFillColor(50,50,200)
            params[:pdf].RDMCell(2, 2, "", 0, 0, "", 1)
          end
        end
        # Renders the label on the right
        if options[:label]
          params[:pdf].SetX(params[:subject_width] + (coords[:bar_end] || 0) + 5)
          params[:pdf].RDMCell(30, 2, options[:label])
        end
      end

      def image_task(params, coords, options={})
        height = options[:height] || 6

        # Renders the task bar, with progress and late
        if coords[:bar_start] && coords[:bar_end]
          params[:image].fill('#aaa')
          params[:image].rectangle(params[:subject_width] + coords[:bar_start], params[:top], params[:subject_width] + coords[:bar_end], params[:top] - height)

          if coords[:bar_late_end]
            params[:image].fill('#f66')
            params[:image].rectangle(params[:subject_width] + coords[:bar_start], params[:top], params[:subject_width] + coords[:bar_late_end], params[:top] - height)
          end
          if coords[:bar_progress_end]
            params[:image].fill('#00c600')
            params[:image].rectangle(params[:subject_width] + coords[:bar_start], params[:top], params[:subject_width] + coords[:bar_progress_end], params[:top] - height)
          end
        end
        # Renders the markers
        if options[:markers]
          if coords[:start]
            x = params[:subject_width] + coords[:start]
            y = params[:top] - height / 2
            params[:image].fill('blue')
            params[:image].polygon(x-4, y, x, y-4, x+4, y, x, y+4)
          end
          if coords[:end]
            x = params[:subject_width] + coords[:end] + params[:zoom]
            y = params[:top] - height / 2
            params[:image].fill('blue')
            params[:image].polygon(x-4, y, x, y-4, x+4, y, x, y+4)
          end
        end
        # Renders the label on the right
        if options[:label]
          params[:image].fill('black')
          params[:image].text(params[:subject_width] + (coords[:bar_end] || 0) + 5,params[:top] + 1, options[:label])
        end
      end
    end
  end
end