Class: Snaptoken::Diff::DiffFile

Inherits:
DiffSection show all
Defined in:
lib/snaptoken/diff.rb

Instance Attribute Summary collapse

Attributes inherited from DiffSection

#contents, #lines, #type

Instance Method Summary collapse

Methods inherited from DiffSection

#<<, #dirty!, #dirty?

Constructor Details

#initialize(filename) ⇒ DiffFile

Returns a new instance of DiffFile.



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# File 'lib/snaptoken/diff.rb', line 57

def initialize(filename)
  super(:file)
  @filename = filename
  @file_contents = ""
end

Instance Attribute Details

#file_contents ⇒ Object (readonly)

Returns the value of attribute file_contents.



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# File 'lib/snaptoken/diff.rb', line 55

def file_contents
  @file_contents
end

#filename ⇒ Object (readonly)

Returns the value of attribute filename.



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# File 'lib/snaptoken/diff.rb', line 55

def filename
  @filename
end

Instance Method Details

#append_line(line) ⇒ Object 



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# File 'lib/snaptoken/diff.rb', line 63

def append_line(line)
  @file_contents << line
  @file_contents << "\n" unless line.end_with? "\n"
end

#new_file! ⇒ Object 



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# File 'lib/snaptoken/diff.rb', line 68

def new_file!; @new_file = true; end

#new_file? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/snaptoken/diff.rb', line 69

def new_file?; @new_file; end

#omit_adjacent_removals! ⇒ Object 



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# File 'lib/snaptoken/diff.rb', line 71

def omit_adjacent_removals!
  change_chain = []
  to_render = @contents.dup
  until to_render.empty?
    cur = to_render.shift
    if cur.is_a? DiffSection
      if cur.dirty?
        to_render = cur.contents + to_render
      else
        [change_chain.first, change_chain.last].compact.each do |line|
          line.type = :nochange if line.empty?
        end
        change_chain = []
      end
    else
      if cur.type == :nochange
        [change_chain.first, change_chain.last].compact.each do |line|
          line.type = :nochange if line.empty?
        end
        change_chain = []
      else
        change_chain << cur
        if cur.type == :add
          change_chain.each { |c| c.omit! if c.type == :remove }
        elsif cur.type == :remove
          cur.omit! if change_chain.any? { |c| c.type == :add }
        end
      end
    end
  end
end

#to_html(project, step) ⇒ Object 



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# File 'lib/snaptoken/diff.rb', line 103

def to_html(project, step)
  formatter = Rouge::Formatters::HTML.new
  formatter = HTMLLineByLine.new(formatter)

  lexer = Rouge::Lexer.guess(filename: @filename)
  code_hl = formatter.format(lexer.lex(@file_contents)).lines.each(&:chomp!)

  html = ""
  html << "<div class=\"diff\">\n"
  html << "<div class=\"filename\"><a href=\"https://github.com/snaptoken/#{project}/blob/#{step}/#{@filename}\">#{@filename}</a></div>\n"
  html << "<pre class=\"highlight\"><code>"

  to_render = @contents.dup
  until to_render.empty?
    cur = to_render.shift
    if cur.is_a? DiffSection
      if cur.dirty?
        to_render = cur.contents + to_render
      else
        summary = cur.lines.map { |n| code_hl[n] }.join(" ... ").gsub("\n", "")
        html << "<div class=\"line folded\">#{summary}</div>"
      end
    elsif !cur.omit?
      tag = {nochange: :div, add: :ins, remove: :del}[cur.type]
      tag = :div if new_file?
      html << "<#{tag} class=\"line\">#{code_hl[cur.line]}</#{tag}>"
    end
  end
  html << "</code></pre>\n</div>\n"

  html
end