/*******************************************************************************
 * Copyright (c) 2011 Willink Transformations and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v20.html
 *
 * Contributors:
 *     E.D.Willink - initial API and implementation
 *******************************************************************************/
grammar org.eclipse.ocl.xtext.markup.Markup hidden()

//generate markup "http://www.omg.org/ocl/markup/Markup"
											
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
import "platform:/resource/org.eclipse.ocl.xtext.markup/model/Markup.ecore"

Markup:
	elements+=MarkupElement*;
	
terminal fragment NUMBER: '0'..'9';
terminal fragment LETTER: 'a'..'z' | 'A'..'Z' | '_';
terminal fragment ESCAPED : '\\' ('b' | 't' | 'n' | 'f' | 'r' | '"' | "'" | '\\' | '<' | '>' | '[' | ']'); 
terminal fragment VERTICAL_WS : '\n' | '\r'; 
terminal fragment HORIZONTAL_WS : ' ' | '\t'; 

terminal INT: NUMBER+;
terminal STRING	: '"' ( ESCAPED | !('\\' | '"') )* '"' ; 
terminal ID: LETTER (LETTER | NUMBER)*;
terminal WORD: ( ESCAPED | !('\\' | '"' | '[' | ']' | ':' | '#' | ',' | HORIZONTAL_WS | VERTICAL_WS) )+;

terminal NL	: (HORIZONTAL_WS* VERTICAL_WS)+;
terminal WS	: HORIZONTAL_WS+;

terminal ANY_OTHER: .;

MarkupKeyword:
	'b'
|	'e'
|	'bullet'
|	'figure'
|	'figureRef'
|	'footnote'
|	'heading'
|	'oclCode'
|	'oclEval'
|	'oclText'
;
	
MarkupElement:
	FontElement
|	NewLineElement
|	BulletElement
|	FigureElement
|	FigureRefElement
|	FootnoteElement
|	HeadingElement
|	NullElement
|	OCLCodeElement
|	OCLEvalElement
|	OCLTextElement
|	TextElement				// Last to give everything else a try first
;

BulletElement:
	{BulletElement} 'bullet' (':' level=INT)? '[' elements+=MarkupElement* ']'
;

FontElement:
	font=('b'|'e') '[' elements+=MarkupElement* ']'
;

FigureElement:
	'figure' ('#' def=ID)? '[' src=STRING (',' alt=STRING (',' requiredWidth=INT (',' requiredHeight=INT)?)?)? ']'
;

FigureRefElement:
	'figureRef' '[' ref=[FigureElement|ID] ']'
;

FootnoteElement:
	{FootnoteElement} 'footnote' '[' elements+=MarkupElement* ']'
;

HeadingElement:
	{HeadingElement} 'heading' (':' level=INT)? '[' elements+=MarkupElement* ']'
;

NewLineElement:
	text=NL
;

NullElement:
	{NullElement} '[' elements+=MarkupElement* ']'
;

OCLCodeElement:
	{OCLCodeElement} 'oclCode' '[' elements+=MarkupElement* ']'
;

OCLEvalElement:
	{OCLEvalElement} 'oclEval' '[' elements+=MarkupElement* ']'
;

OCLTextElement:
	{OCLTextElement} 'oclText' '[' elements+=MarkupElement* ']'
;

TextElement:
	text+=(ID|WORD|INT|WS|':'|'#'|',')+ | text+=MarkupKeyword
;