Class: Rouge::GtkThemeLoader

Inherits:
Object
  • Object
show all
Includes:
Token::Tokens
Defined in:
lib/rouge/gtk_theme_loader.rb,
lib/rouge/gtk_theme_loader/version.rb

Defined Under Namespace

Classes: GtkTheme

Constant Summary collapse

THEME_PATHS = 
[
"/usr/share/gtksourceview-2.0/styles/*.xml",
"/usr/share/gtksourceview-3.0/styles/*.xml",
"/usr/share/gtksourceview-4/styles/*.xml",
"~/.local/share/gtksourceview-2.0/styles/*.xml",
"~/.local/share/gtksourceview-3.0/styles/*.xml",
"~/.local/share/gtksourceview-4/styles/*.xml",
"~/.local/share/rouge/styles/*.xml"
]
GTKMAPPING =

GTK source view mappings to Rouge token mappings This is incomplete.

{
  "def:string"       => Literal::String,
  "def:constant"     => Literal,
  "def:number"       => Literal::Number,
  "def:variable"     => Name::Variable,
  "def:keyword"      => Keyword,
  "def:statement"    => Keyword,
  "def:comment"      => Comment,
  "def:type"         => [Name::Constant, Name::Namespace],
  "def:identifier"   => Name::Builtin,
  "def:emphasis"     => Generic::Emph,
  "def:preprocessor" => Name::Builtin,
  "def:builtin"      => Name::Builtin,
  "def:instance-variable" => Name::Variable::Instance,
  "def:operator"     => Operator,
  "def:boolean"      => Keyword::Pseudo,

  # FIXME: Use theme specific ones as fallbacks only.
  "ruby:global-variable" => Name::Variable::Global,
  "ruby:instance-variable" => Name::Variable::Instance,
  "ruby:constant" => Name::Constant,
  "ruby:builtin"      => Name::Builtin,
}
VERSION = 
"0.3.2"

Class Method Summary collapse

Class Method Details

.contrast(col) ⇒ Object

Attempt to get a color that’s not entirely unreadable when a theme is stupid Will fail horribly for all kinds of values.



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# File 'lib/rouge/gtk_theme_loader.rb', line 72

def self.contrast(col)
  r,g,b = col[1..2].to_i(16), col[3..4].to_i(16), col[5..6].to_i(16)
  rn,gn,bn = 255-r, 255-g,255-b
  "#%02x%02x%02x" % [rn,gn,bn]
end

.load(theme) ⇒ Object 



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# File 'lib/rouge/gtk_theme_loader.rb', line 78

def self.load(theme)
    xml =  Nokogiri.XML(File.read(theme))
    theme = Class.new(GtkTheme)
    name = xml.xpath("/style-scheme").attr("id").value
    theme.name(name)
    
    xml.xpath("//color").each do |c|
      theme.palette(c.attr("name").to_sym => c.attr("value").to_sym)
    end
    
    # Rouge barfs if we don't have a default style, so let's make sure
    @text = xml.xpath("//style[@name='text']").first
    if @text
      
      theme.style(Text,
      :fg => @text&.attr("foreground")&.to_sym,
      :bg => @text&.attr("background")&.to_sym
    )
  else
    bgp = xml.xpath("//style[@name='background-pattern']")
    if bgp
      bg = bgp&.attr("background")&.value
    end
    bg ||= "#000000"
    if bg[0] == ?#
      fg = contrast(bg)
    end
    theme.style(Text, :fg => fg, :bg => bg, :underline => true)
  end
  
  xml.xpath("//style").each do |node|
    name = node.attr("name")
    
    use = node.attr("use-style")
    if use && GTKMAPPING[use]
      #  name = use
    end
    rougetype = GTKMAPPING[name]
    fg = node.attr("foreground")
    fg = @text.attr("foreground") if @text && !fg
    fg = fg.to_sym if fg && fg[0] != '#'
    bg = node.attr("background")
    fg = @text.attr("background") if @text && !fg
    bg = bg.to_sym if bg && bg[0] != '#'
    opts = {}
    opts[:bg] = bg if bg
    if fg
      opts[:fg] = fg
    end
    
    opts[:italic]    = true if node.attr("italic").to_s == "true"
    opts[:bold]      = true if node.attr("bold").to_s == "true"
    opts[:underline] = true if node.attr("underline")&.to_s == "true"
    
    if name.index(":") != nil
      Array(rougetype).each do |rt|
        theme.style(rt, opts)
      end
    end
    theme.other_styles[name] = opts
  end
end

.load! ⇒ Object 



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# File 'lib/rouge/gtk_theme_loader.rb', line 51

def self.load!
  THEME_PATHS.each do |path|
    Dir[File.expand_path(path).to_s].each do |theme|
      GtkThemeLoader.load(theme)
    end
  end
end