/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012-2017 gnosygnu@gmail.com

XOWA is licensed under the terms of the General Public License (GPL) Version 3,
or alternatively under the terms of the Apache License Version 2.0.

You may use XOWA according to either of these licenses as is most appropriate
for your project on a case-by-case basis.

The terms of each license can be found in the source code repository:

GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
*/
package gplx.gfml; import gplx.*;
import gplx.core.texts.*; /*CharStream*/ 
public class GfmlBldr {
	@gplx.Internal protected GfmlDoc			Doc() {return gdoc;} GfmlDoc gdoc = GfmlDoc.new_();
	@gplx.Internal protected GfmlFrame			CurFrame() {return curFrame;} GfmlFrame curFrame;
	@gplx.Internal protected GfmlFrame_nde		CurNdeFrame() {return curNdeFrame;} GfmlFrame_nde curNdeFrame;
	@gplx.Internal protected GfmlNde			CurNde() {return curNdeFrame.CurNde();}
	@gplx.Internal protected GfmlTypeMgr		TypeMgr() {return typeMgr;} GfmlTypeMgr typeMgr = GfmlTypeMgr.new_();
	@gplx.Internal protected Hash_adp				Vars() {return vars;} Hash_adp vars = Hash_adp_.New();
	@gplx.Internal protected int				StreamPos()	{return streamPos;} int streamPos;
	@gplx.Internal protected void				ThrowErrors_set(boolean v) {throwErrors = v;} private boolean throwErrors = true;
	@gplx.Internal protected int PrvSymType() {return prvSymType;} @gplx.Internal protected void PrvSymType_set(int v) {prvSymType = v;} int prvSymType = GfmlNdeSymType.Null;
	@gplx.Internal protected int ChainIdNext() {return chainIdNext++;} int chainIdNext = 1;
	public GfmlDoc XtoGfmlDoc(String raw) {
		Init(raw);
		CharStream stream = CharStream.pos0_(raw);
		while (stream.AtMid()) {
			streamPos = stream.Pos();	// NOTE: streamPos is defined as just before curTkn
			GfmlTkn curTkn = curFrame.Lxr().MakeTkn(stream, 0);
			curTkn.Cmd_of_Tkn().Exec(this, curTkn);
			if (stopBldr) break;
		}
		if (!stopBldr) {
			curNdeFrame.Build_end(this, GfmlFrame_nde_.OwnerRoot_);
			if (frameStack.Count() > 0) UsrMsgs_fail(GfmlUsrMsgs.fail_Frame_danglingBgn());
		}
		if (throwErrors && gdoc.UsrMsgs().Count() > 0) throw GfmlUsrMsgs.gfmlParseError(this);
		raw = "";
		return gdoc;
	}
	void Init(String raw) {
		this.raw = raw; stopBldr = false; gdoc.Clear(); vars.Clear(); frameStack.Clear(); chainIdNext = 1; 
		curNdeFrame = GfmlFrame_nde_.root_(this, gdoc.RootNde(), gdoc.RootLxr());
		curNdeFrame.NullArea_set(true);
		curFrame = curNdeFrame;
	}
	@gplx.Internal protected void Frames_push(GfmlFrame newFrame) {
		frameStack.Push(curFrame);
		curFrame = newFrame;
		if (curFrame.FrameType() == GfmlFrame_.Type_nde) curNdeFrame = GfmlFrame_nde_.as_(curFrame);
	}		
	@gplx.Internal protected void Frames_end() {
		if (frameStack.Count() == 0) {
			UsrMsgs_fail(GfmlUsrMsgs.fail_Frame_danglingBgn());
			return;
		}
		GfmlFrame oldFrame = curFrame;
		curFrame = frameStack.Pop();
		oldFrame.Build_end(this, curFrame);
		if (curFrame.FrameType() == GfmlFrame_.Type_nde) curNdeFrame = GfmlFrame_nde_.as_(curFrame);
	}
	@gplx.Internal protected void UsrMsgs_fail(UsrMsg um) {
		GfmlUsrMsgs.MakeErr(this, um, raw);
		stopBldr = true;
	}
	GfmlFrameStack frameStack = GfmlFrameStack.new_(); boolean stopBldr = false; String raw = "";
}