namespace a = "http://relaxng.org/ns/compatibility/annotations/1.0"
##
# NOTE: To modify this Relax NG grammar, edit the Relax NG Compact (.rnc) file
#   and use a converter tool like trang to generate the Relax NG XML (.rng) file
##

start = object | objects | setup | sprites | styles

##
# Types #
##
# xsd:boolean could be used instead of this definition,
# though it considers "1" & "0" as valid values.
bool = "true" | "false"
align = "left" | "center" | "right"
valign = "top" | "center" | "bottom"
wrapmode = "repeat" | "mirrored_repeat" | "clamp_to_edge"
coord = xsd:string { pattern = "-?\d*\.?\d+(%([\+\-]\d*\.?\d+)?)?" }
clientarea = list { coord, coord, coord, coord }
# color can be a name or "R G B A" format string
rgba = list { xsd:integer { minInclusive = "0" maxInclusive = "255" },
              xsd:integer { minInclusive = "0" maxInclusive = "255" },
              xsd:integer { minInclusive = "0" maxInclusive = "255" },
              xsd:integer { minInclusive = "0" maxInclusive = "255" }?}
ccolor = rgba | xsd:string { pattern = "[A-Za-z]+" }
size = list { xsd:decimal, xsd:decimal }
pos = list { xsd:decimal, xsd:decimal }
rect = list { xsd:decimal, xsd:decimal, xsd:decimal, xsd:decimal }

##
# Defines #
##
unique_settings =
  attribute name { text }?,
  [ a:defaultValue = "empty" ] attribute type { text }?,
  attribute style { text }?
# This could probably be made more specific/strict
# with more information regarding the use/meaning
# of these attributes.
base_settings =
  attribute absolute { bool }?&
  attribute enable { bool }?&
  attribute ghost { bool }?&
  attribute hidden { bool }?&
  attribute size { clientarea }?&
  attribute z { xsd:decimal }?
# Defaults are not put in here, because it ruins the concept of styles.
ex_settings =
  attribute anchor { valign }?&
  attribute buffer_zone { xsd:decimal }?&
  attribute buffer_width { xsd:decimal }?&
  attribute button_width { xsd:decimal }?&
  attribute checked { bool }?&
  attribute clip { bool }?&
  attribute dropdown_size { xsd:decimal }?&
  attribute dropdown_buffer { xsd:decimal }?&
  attribute enabled { bool }?&
  attribute font { text }?&
  attribute fov_wedge_color { ccolor }?&
  attribute hotkey { text }?&
  attribute cell_id { xsd:integer }?&
  attribute independent { bool }?&
  attribute input_initvalue_destroyed_at_focus { bool }?&
  attribute mask { bool }?&
  attribute mask_char { xsd:string { minLength = "1" maxLength = "1" } }?&
  attribute max_length { xsd:nonNegativeInteger }?&
  attribute maxwidth { xsd:decimal }? &
  attribute multiline { bool }?&
  attribute offset { pos }?&
  attribute scrollbar { bool }?&
  attribute scrollbar_style { text }?&
  attribute scroll_bottom { bool }?&
  attribute sound_closed { text }?&
  attribute sound_disabled { text }?&
  attribute sound_enter { text }?&
  attribute sound_leave { text }?&
  attribute sound_opened { text }?&
  attribute sound_pressed { text }?&
  attribute sound_selected { text }?&
  attribute sprite { text }?&
  attribute sprite2 { text }?&
  attribute sprite_heading { text }?&
  attribute sprite_bar { text }?&
  attribute sprite_background { text }?&
  attribute sprite_disabled { text }?&
  attribute sprite_list { text }?&
  attribute sprite2_disabled { text }?&
  attribute sprite_over { text }?&
  attribute sprite2_over { text }?&
  attribute sprite_pressed { text }?&
  attribute sprite2_pressed { text }?&
  attribute sprite_selectarea { text }?&
  attribute square_side { xsd:decimal }?&
  attribute textcolor { ccolor }?&
  attribute textcolor_disabled { ccolor }?&
  attribute textcolor_over { ccolor }?&
  attribute textcolor_pressed { ccolor }?&
  attribute textcolor_selected { ccolor }?&
  attribute text_align { align }?&
  attribute text_valign { valign }?&
  attribute tooltip { text }?&
  attribute tooltip_style { text }?

##
# Objects #
##
objects = element objects { (script | object)* }
script =
  element script {
    text &
    attribute file { text }? &
    attribute directory { text }?
  }
object =
  element object {
    ((object
      | action
      | \attribute
      | def
      | \include
      | item
      | repeat
      | translatableAttribute)*
      | text),
    unique_settings,
    base_settings,
    ex_settings
  }
action =
  element action {
    text,
    attribute on { text },
    attribute file { text }?
  }
\attribute =
  element attribute {
    (keep | translate)*,
    attribute id { text }
  }
def =
  element def {
    translatableAttribute?,
    (
    attribute id { text }&
    attribute color { ccolor }?&
    attribute heading { text }?&
    attribute width { text }?
    )
  }
\include =
  element include {
	attribute file { text }|
    attribute directory { text }
}
item =
  element item {
    text,
    attribute enabled { bool }?
  }
keep = element keep { text }
repeat =
  element repeat {
    object+,
    attribute count { text }
  }
translate = element translate { text }
translatableAttribute =
  element translatableAttribute {
    text,
    (
    attribute id { text }&
    attribute comment { text }?&
    attribute context { text }?
    )
  }

##
# Styles #
##
styles = element styles { style* }
style =
  element style {
    attribute name { text },
    base_settings,
    ex_settings
  }

##
# Setup #
##
setup = element setup { (icon | scrollbar | tooltip | color)* }
scrollbar =
  element scrollbar {
    attribute name { text }&
    attribute width { xsd:decimal }&
    attribute alwaysshown { bool }?&
    attribute maximum_bar_size { xsd:decimal }?&
    attribute minimum_bar_size { xsd:decimal }?&
    attribute scroll_wheel { bool }?&
    attribute show_edge_buttons { bool }?&
    attribute sprite_button_top { text }?&
    attribute sprite_button_top_pressed { text }?&
    attribute sprite_button_top_disabled { text }?&
    attribute sprite_button_top_over { text }?&
    attribute sprite_button_bottom { text }?&
    attribute sprite_button_bottom_pressed { text }?&
    attribute sprite_button_bottom_disabled { text }?&
    attribute sprite_button_bottom_over { text }?&
    attribute sprite_bar_vertical { text }?&
    attribute sprite_bar_vertical_over { text }?&
    attribute sprite_bar_vertical_pressed { text }?&
    attribute sprite_back_vertical { text }?
  }
icon =
  element icon {
    attribute name { text }&
    attribute size { size }&
    attribute sprite { text }&
    attribute cell_id { text }?
  }
tooltip =
  element tooltip {
    attribute name { text }&
    attribute sprite { text }?&
    attribute anchor { valign }?&
    attribute buffer_zone { xsd:decimal }?&
    attribute font { text }?&
    attribute maxwidth { xsd:decimal }?&
    attribute offset { pos }?&
    attribute textcolor { ccolor }?&
    attribute delay { xsd:integer }?&
    attribute use_object { text }?&
    attribute hide_object { bool }?
  }
color =
  element color {
    rgba,
    attribute name { text }
  }

##
# Sprites #
##
sprites = element sprites { sprite* }
sprite =
  element sprite {
    (effect?, image+),
    attribute name { text }
  }
image =
  element image {
    effect?,
    (
    attribute texture { text }?&
    attribute size { clientarea }?&
    attribute texture_size { clientarea }?&
    attribute real_texture_placement { rect }?&
    attribute cell_size { size }?&
    attribute backcolor { ccolor }?&
    attribute bordercolor { ccolor }?&
    attribute border { bool }?&
    attribute z_level { xsd:float }?&
    attribute fixed_h_aspect_ratio { xsd:decimal }?&
    attribute round_coordinates { bool }?&
    attribute wrap_mode { wrapmode }?
    )
  }
effect =
  element effect {
    attribute add_color { ccolor }?,
    attribute multiply_color { ccolor }?,
    attribute grayscale { empty }?
  }