423 lines
11 KiB
Ruby
423 lines
11 KiB
Ruby
# frozen_string_literal: true
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# ANSI color library
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#
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# Implementation per http://en.wikipedia.org/wiki/ANSI_escape_code
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module Gitlab
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module Ci
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module Ansi2html
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# keys represent the trailing digit in color changing command (30-37, 40-47, 90-97. 100-107)
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COLOR = {
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0 => 'black', # not that this is gray in the intense color table
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1 => 'red',
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2 => 'green',
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3 => 'yellow',
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4 => 'blue',
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5 => 'magenta',
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6 => 'cyan',
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7 => 'white' # not that this is gray in the dark (aka default) color table
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}.freeze
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STYLE_SWITCHES = {
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bold: 0x01,
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italic: 0x02,
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underline: 0x04,
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conceal: 0x08,
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cross: 0x10
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}.freeze
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def self.convert(ansi, state = nil)
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Converter.new.convert(ansi, state)
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end
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class Converter
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def on_0(_) reset end
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def on_1(_) enable(STYLE_SWITCHES[:bold]) end
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def on_3(_) enable(STYLE_SWITCHES[:italic]) end
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def on_4(_) enable(STYLE_SWITCHES[:underline]) end
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def on_8(_) enable(STYLE_SWITCHES[:conceal]) end
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def on_9(_) enable(STYLE_SWITCHES[:cross]) end
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def on_21(_) disable(STYLE_SWITCHES[:bold]) end
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def on_22(_) disable(STYLE_SWITCHES[:bold]) end
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def on_23(_) disable(STYLE_SWITCHES[:italic]) end
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def on_24(_) disable(STYLE_SWITCHES[:underline]) end
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def on_28(_) disable(STYLE_SWITCHES[:conceal]) end
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def on_29(_) disable(STYLE_SWITCHES[:cross]) end
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def on_30(_) set_fg_color(0) end
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def on_31(_) set_fg_color(1) end
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def on_32(_) set_fg_color(2) end
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def on_33(_) set_fg_color(3) end
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def on_34(_) set_fg_color(4) end
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def on_35(_) set_fg_color(5) end
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def on_36(_) set_fg_color(6) end
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def on_37(_) set_fg_color(7) end
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def on_38(stack) set_fg_color_256(stack) end
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def on_39(_) set_fg_color(9) end
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def on_40(_) set_bg_color(0) end
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def on_41(_) set_bg_color(1) end
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def on_42(_) set_bg_color(2) end
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def on_43(_) set_bg_color(3) end
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def on_44(_) set_bg_color(4) end
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def on_45(_) set_bg_color(5) end
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def on_46(_) set_bg_color(6) end
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def on_47(_) set_bg_color(7) end
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def on_48(stack) set_bg_color_256(stack) end
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def on_49(_) set_bg_color(9) end
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def on_90(_) set_fg_color(0, 'l') end
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def on_91(_) set_fg_color(1, 'l') end
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def on_92(_) set_fg_color(2, 'l') end
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def on_93(_) set_fg_color(3, 'l') end
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def on_94(_) set_fg_color(4, 'l') end
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def on_95(_) set_fg_color(5, 'l') end
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def on_96(_) set_fg_color(6, 'l') end
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def on_97(_) set_fg_color(7, 'l') end
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def on_99(_) set_fg_color(9, 'l') end
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def on_100(_) set_bg_color(0, 'l') end
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def on_101(_) set_bg_color(1, 'l') end
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def on_102(_) set_bg_color(2, 'l') end
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def on_103(_) set_bg_color(3, 'l') end
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def on_104(_) set_bg_color(4, 'l') end
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def on_105(_) set_bg_color(5, 'l') end
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def on_106(_) set_bg_color(6, 'l') end
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def on_107(_) set_bg_color(7, 'l') end
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def on_109(_) set_bg_color(9, 'l') end
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attr_accessor :offset, :n_open_tags, :fg_color, :bg_color, :style_mask, :sections, :lineno_in_section
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STATE_PARAMS = [:offset, :n_open_tags, :fg_color, :bg_color, :style_mask, :sections, :lineno_in_section].freeze
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def convert(stream, new_state)
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reset_state
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restore_state(new_state, stream) if new_state.present?
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append = false
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truncated = false
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cur_offset = stream.tell
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if cur_offset > @offset
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@offset = cur_offset
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truncated = true
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else
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stream.seek(@offset)
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append = @offset > 0
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end
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start_offset = @offset
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stream.each_line do |line|
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s = StringScanner.new(line)
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until s.eos?
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if s.scan(Gitlab::Regex.build_trace_section_regex)
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handle_section(s)
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elsif s.scan(/\e([@-_])(.*?)([@-~])/)
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handle_sequence(s)
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elsif s.scan(/\e(([@-_])(.*?)?)?$/)
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break
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elsif s.scan(/</)
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write_in_tag '<'
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elsif s.scan(/\r?\n/)
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handle_new_line
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else
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write_in_tag s.scan(/./m)
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end
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@offset += s.matched_size
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end
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end
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close_open_tags
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# TODO: replace OpenStruct with a better type
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# https://gitlab.com/gitlab-org/gitlab/issues/34305
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OpenStruct.new(
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html: @out.force_encoding(Encoding.default_external),
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state: state,
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append: append,
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truncated: truncated,
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offset: start_offset,
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size: stream.tell - start_offset,
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total: stream.size
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)
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end
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def section_to_class_name(section)
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section.to_s.downcase.gsub(/[^a-z0-9]/, '-')
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end
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def handle_new_line
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write_in_tag %{<br/>}
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close_open_tags if @sections.any? && @lineno_in_section == 0
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@lineno_in_section += 1
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end
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def handle_section(scanner)
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action = scanner[1]
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timestamp = scanner[2]
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section = scanner[3]
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normalized_section = section_to_class_name(section)
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if action == "start"
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handle_section_start(normalized_section, timestamp)
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elsif action == "end"
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handle_section_end(normalized_section, timestamp)
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end
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end
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def handle_section_start(section, timestamp)
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return if @sections.include?(section)
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@sections << section
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write_raw %{<div class="section-start" data-timestamp="#{timestamp}" data-section="#{data_section_names}" role="button"></div>}
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@lineno_in_section = 0
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end
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def handle_section_end(section, timestamp)
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return unless @sections.include?(section)
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# close all sections up to section
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until @sections.empty?
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write_raw %{<div class="section-end" data-section="#{data_section_names}"></div>}
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last_section = @sections.pop
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break if section == last_section
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end
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end
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def data_section_names
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@sections.join(" ")
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end
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def handle_sequence(scanner)
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indicator = scanner[1]
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commands = scanner[2].split ';'
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terminator = scanner[3]
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# We are only interested in color and text style changes - triggered by
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# sequences starting with '\e[' and ending with 'm'. Any other control
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# sequence gets stripped (including stuff like "delete last line")
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return unless indicator == '[' && terminator == 'm'
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close_open_tags
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if commands.empty?
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reset
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return
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end
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evaluate_command_stack(commands)
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end
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def evaluate_command_stack(stack)
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return unless command = stack.shift
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if self.respond_to?("on_#{command}", true)
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self.__send__("on_#{command}", stack) # rubocop:disable GitlabSecurity/PublicSend
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end
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evaluate_command_stack(stack)
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end
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def write_in_tag(data)
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ensure_open_new_tag
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@out << data
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end
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def write_raw(data)
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close_open_tags
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@out << data
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end
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def ensure_open_new_tag
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open_new_tag if @n_open_tags == 0
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end
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def open_new_tag
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css_classes = []
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unless @fg_color.nil?
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fg_color = @fg_color
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# Most terminals show bold colored text in the light color variant
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# Let's mimic that here
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if @style_mask & STYLE_SWITCHES[:bold] != 0
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fg_color.sub!(/fg-([a-z]{2,}+)/, 'fg-l-\1')
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end
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css_classes << fg_color
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end
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css_classes << @bg_color unless @bg_color.nil?
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STYLE_SWITCHES.each do |css_class, flag|
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css_classes << "term-#{css_class}" if @style_mask & flag != 0
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end
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if @sections.any?
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css_classes << "section"
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css_classes << if @lineno_in_section == 0
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"section-header"
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else
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"line"
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end
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css_classes += sections.map { |section| "js-s-#{section}" }
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end
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close_open_tags
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@out << if css_classes.any?
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%{<span class="#{css_classes.join(' ')}">}
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else
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%{<span>}
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end
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@n_open_tags += 1
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end
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def close_open_tags
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while @n_open_tags > 0
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@out << %{</span>}
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@n_open_tags -= 1
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end
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end
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def reset_state
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@offset = 0
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@n_open_tags = 0
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@out = +''
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@sections = []
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@lineno_in_section = 0
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reset
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end
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def state
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state = STATE_PARAMS.inject({}) do |h, param|
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h[param] = send(param) # rubocop:disable GitlabSecurity/PublicSend
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h
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end
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Base64.urlsafe_encode64(state.to_json)
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end
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def restore_state(new_state, stream)
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state = Base64.urlsafe_decode64(new_state)
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state = JSON.parse(state, symbolize_names: true)
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return if state[:offset].to_i > stream.size
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STATE_PARAMS.each do |param|
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send("#{param}=".to_sym, state[param]) # rubocop:disable GitlabSecurity/PublicSend
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end
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end
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def reset
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@fg_color = nil
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@bg_color = nil
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@style_mask = 0
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end
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def enable(flag)
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@style_mask |= flag
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end
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def disable(flag)
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@style_mask &= ~flag
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end
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def set_fg_color(color_index, prefix = nil)
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@fg_color = get_term_color_class(color_index, ["fg", prefix])
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end
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def set_bg_color(color_index, prefix = nil)
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@bg_color = get_term_color_class(color_index, ["bg", prefix])
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end
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def get_term_color_class(color_index, prefix)
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color_name = COLOR[color_index]
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return if color_name.nil?
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get_color_class(["term", prefix, color_name])
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end
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def set_fg_color_256(command_stack)
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css_class = get_xterm_color_class(command_stack, "fg")
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@fg_color = css_class unless css_class.nil?
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end
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def set_bg_color_256(command_stack)
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css_class = get_xterm_color_class(command_stack, "bg")
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@bg_color = css_class unless css_class.nil?
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end
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def get_xterm_color_class(command_stack, prefix)
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# the 38 and 48 commands have to be followed by "5" and the color index
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return unless command_stack.length >= 2
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return unless command_stack[0] == "5"
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command_stack.shift # ignore the "5" command
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color_index = command_stack.shift.to_i
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return unless color_index >= 0
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return unless color_index <= 255
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get_color_class(["xterm", prefix, color_index])
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end
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def get_color_class(segments)
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[segments].flatten.compact.join('-')
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end
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end
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end
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end
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end
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