debian-mirror-gitlab/lib/gitlab/ci/ansi2html.rb

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