name: "Gremlin Image"
scopeName: "source.gremlin"
fileTypes: [
	"gsrc"
	"grn"
	"gremlin"
]
firstLineMatch: "^\\s*(?:sun)?gremlinfile(?=\\s|$)"
patterns: [
	{include: "#data"}
	{include: "#tags"}
]

repository:

	# .GS/.GE: Tags for embedding gremlin pictures
	tags:
		begin: "^([.'])[ \\t]*(GS)(?=$|\\s|\\\\E?[\"#])(.*)$"
		end:   "^([.'])[ \\t]*(GE|GF)(?=$|\\s|\\\\E?[\"#])"
		beginCaptures:
			0: name: "meta.function.begin.gremlin.macro.roff"
			1: name: "punctuation.definition.macro.roff"
			2: name: "entity.function.name.roff"
			3: patterns: [{
				name: "constant.language.alignment-mode.grn.roff"
				match: "(?:^|\\G)\\s*([LIC])\\b"
			}, include: "text.roff#escapes"]
		endCaptures:
			0: name: "meta.function.end.gremlin.macro.roff"
			1: name: "punctuation.definition.macro.roff"
			2: name: "entity.name.function.roff"
		patterns: [{
			begin: "\\A\\s*((?:sun)?gremlinfile)(?=\\s|$)"
			end:   "(?=A)B"
			patterns: [include: "#data"]
		}, include: "#grn"]
	
	
	# grn(1) preprocessor commands
	grn:
		patterns: [{
			# Boolean-type parameter
			name: "meta.directive.preprocessor.grn.roff"
			match: """(?ix) ^\\s*
				(pointscale|pointscal|pointsca|pointsc|points
				|point|poin|poi|po|p) (?:\\s+(on|off))?
				(?=\\s|$) """
			captures:
				1: name: "keyword.operator.point-scale.grn.roff"
				2: name: "constant.language.boolean.grn.roff"
		},{
			# Load gremlin data from file "XX"
			name: "meta.directive.preprocessor.grn.roff"
			match: "(?i)^\\s*(file|fil|fi|f)\\s+(\\S.*)"
			captures:
				1: name: "keyword.control.directive.include.grn.roff"
				2: name: "string.unquoted.filename.grn.roff"
		},{
			# Everything else expected between .GS/.GE tags
			name: "keyword.operator.directive.preprocessor.grn.roff"
			match: """(?ix) ^\\s*
				( [1-4] (?=\\s+\\S)
				| roman|roma|rom|ro|r
				| italics|italic|itali|ital|ita|it|i
				| bold|bol|bo|b
				| special|specia|speci|spec|spe|sp
				| stipple|stippl|stipp|stip|sti|st|l
				| scale|scal|sca|sc|x
				| narrow|narro|narr|nar|na
				| medium|mediu|medi|med|me
				| thick|thic|thi|th|t
				| default|defaul|defau|defa|def|de|d
				| width|widt|wid|wi|w
				| height|heigh|heig|hei|he|h
				) (?=\\s|$)"""
		}, include: "text.roff#params"]

	
	# Actual image coordinates
	data:
		begin: "^\\s*((?:sun)?gremlinfile)(?=\\s|$).*"
		end:   "^\\s*(-1)\\s*$"
		beginCaptures:
			0: name: "meta.file.start.gremlin"
			1: name: "keyword.control.flow.begin-file.gremlin"
		endCaptures:
			0: name: "meta.file.end.gremlin"
			1: name: "comment.line.ignored.end-of-file.gremlin"
		contentName: "meta.file.body.gremlin"
		patterns: [{
			name: "keyword.operator.element-specification.sun.gremlin"
			match: """(?x)\\b
				(ARC|BEZIER|BOTCENT|BOTLEFT|BOTRIGHT|BSPLINE|CENTCENT|CENTLEFT
				|CENTRIGHT|CURVE|POLYGON|TOPCENT|TOPLEFT|TOPRIGHT|VECTOR)\\b"""
		},{
			match: "^\\s*([0-6])\\s+([0-9]+)\\s*$"
			captures:
				1: name: "keyword.operator.element-brush.gremlin"
				2: name: "keyword.operator.element-size.gremlin"
		},{
			name: "comment.line.ignored.end-point-list.gremlin"
			match: "^\\s*(?:\\*|-1.0+\\s+-1.0+)\\s*$"
		},{
			name: "keyword.operator.element-specification.aed.gremlin"
			match: "^\\s*[0-9]+(?:\\s*$|\\s+(?=\\d))"
		},{
			match: """(?x) ^\\s*
				( (6) \\s+ (\\S.{5})
				| (5) \\s+ (\\S.{4})
				| (4) \\s+ (\\S.{3})
				| (3) \\s+ (\\S.{2})
				| (2) \\s+ (\\S.{1})
				| (1) \\s+ ([7-9\\D])
				| ((?!0)\\d+) \\s+ (\\S.*)
				) \\s* $"""
			captures:
				1:  name: "meta.element-text.gremlin"
				2:  name: "keyword.operator.character-count.6.gremlin"
				3:  name: "string.unquoted.gremlin"
				4:  name: "keyword.operator.character-count.5.gremlin"
				5:  name: "string.unquoted.gremlin"
				6:  name: "keyword.operator.character-count.4.gremlin"
				7:  name: "string.unquoted.gremlin"
				8:  name: "keyword.operator.character-count.3.gremlin"
				9:  name: "string.unquoted.gremlin"
				10: name: "keyword.operator.character-count.2.gremlin"
				11: name: "string.unquoted.gremlin"
				12: name: "keyword.operator.character-count.1.gremlin"
				13: name: "string.unquoted.gremlin"
				14: name: "keyword.operator.character-count.gremlin"
				15: name: "string.unquoted.gremlin"
		},{
			name: "constant.numeric.decimal.gremlin"
			match: "\\d+(?:\\.\\d+)?"
		}]