/* -*- C++ -*-
 * Copyright ©2004 Hugo Mills <hugo@carfax.org.uk>
 *
 * This software is distributed under the terms of the GNU GPL v3
 * For more information on the GPL, see the file COPYING or 
 * visit http://www.gnu.org/
 *
 * This software is distributed without warranty
 */

#include "magellan/xfview.h"
#include "magellan/plugininfo_viewport.h"
#include "magellan/parsertools.h"

PluginInfo* XfView::getmodules(int i)
{
	if(i == 0)
	{
		PluginInfo_Viewport* pi = new PluginInfo_Viewport();

		pi->name = "Viewport Builtin";
		pi->author = "Hugo Mills";
		pi->version = 0x10000;
		pi->parser = XfView::parse;
		return pi;
	}
	else
		return NULL;
}

XfView* XfView::parse(
	ConfigLexer* lex,
	const std::string& type,
	const std::string& subtype
	)
{
	ivec2 tr;
	ivec2 bl;
	ivec2 sz;
	ivec2 cn;
	tr[0] = -1000000;
	bl[0] = -1000000;
	sz[0] = -1000000;
	cn[0] = -1000000;
	double scale = 1.0;

	while(!lex->eos()) {
		if(readkeyedvalue(lex, "top-right", &tr[0], &tr[1])
		   || readkeyedvalue(lex, "bottom-left", &bl[0], &bl[1])
		   || readkeyedvalue(lex, "size", &sz[0], &sz[1])
		   || readkeyedvalue(lex, "scale", &scale)
		   || readkeyedvalue(lex, "centre", &cn[0], &cn[1])
			)
			;
		else
			throw(UnknownConfigToken(lex));
	}

	if(tr[0] != -1000000 && bl[0] != -1000000)
		;
	else if(bl[0] != -1000000 && sz[0] != -1000000)
	{
		tr[0] = bl[0] + sz[0];
		tr[1] = bl[1] + sz[1];
	}
	else if(tr[0] != -1000000 && sz[0] != -1000000)
	{
		bl[0] = tr[0] - sz[0];
		bl[1] = tr[1] - sz[1];
	}
	else
//		throw(BadConfiguration)
		;
	
	if(cn[0] == -1000000)
	{
		cn[0] = (tr[0] - bl[0])/2;
		cn[1] = (tr[1] - bl[1])/2;
	}

	return new XfView(bl, tr, cn, scale);
}

bool XfView::f(ivec2& result, const dvec2& pre) const
{
	result[0] = int(pre[0]*scale);
	result[1] = int(pre[1]*scale);
	result += bottom_left;
	result += centre;

	if(result[0] < bottom_left[0] || result[0] >= top_right[0]
	   || result[1] < bottom_left[1] || result[1] >= top_right[1])
		return false;

	return true;
}

bool XfView::g(dvec2& result, const ivec2& post) const
{
	result[0] = (post[0]-centre[0]-bottom_left[0])/scale;
	result[1] = (post[1]-centre[1]-bottom_left[1])/scale;

	return true;
}

void XfView::set_left(int x)
{
	centre[0] -= x - bottom_left[0];
	bottom_left[0] = x;
}

void XfView::set_bottom(int y)
{
	centre[1] -= y - bottom_left[1];
	bottom_left[1] = y;
}