#include "graph.h"

void _F_grsteps::step3 (GRAPH_MODE, GR_NODE &node)
{
}
void _F_grsteps::step4 (GRAPH_MODE, GR_NODE &node)
{
}
void _F_grsteps::step5 (GRAPH_MODE, GR_NODE &node)
{
}
void _F_grsteps::step6 (GRAPH_MODE, GR_NODE &node)
{
}

void _F_grsteps::link1(GR_NODE &node1, GR_NODE &node2)
{
	linkline (node1,ANCHOR_BOTTOM,node2,ANCHOR_TOP);
}
void _F_grsteps::link2(GR_NODE &node1, GR_NODE &node2)
{
	linkline (node1,ANCHOR_BOTTOM,node2,ANCHOR_TOP);
}
void _F_grsteps::link3(GR_NODE &node1, GR_NODE &node2)
{
	linkline (node1,ANCHOR_BOTTOM,node2,ANCHOR_TOP);
}
void _F_grsteps::link4(GR_NODE &node1, GR_NODE &node2)
{
	linkline (node1,ANCHOR_BOTTOM,node2,ANCHOR_TOP);
}
void _F_grsteps::link5(GR_NODE &node1, GR_NODE &node2)
{
	linkline (node1,ANCHOR_BOTTOM,node2,ANCHOR_TOP);
}


void grsteps (_F_grsteps &c, GRAPH_MODE mode, GR_NODE &node, bool centered)
{
	node.width = node.height = node.depth = 0;
	node.margin.top = node.margin.right = node.margin.left = 0;
	node.margin.bottom = 0;
	GR_NODE tbnode[6];
	for (int i=0; i<2; i++){
		GRAPH_MODE emode = i==0 ? GR_EVAL : GR_DRAW;
		int x = node.x;
		int y = node.y;
		for (int j=0; j<6; j++){
			GR_NODE *snode = tbnode + j;
			if (centered){
				snode->x = x + (node.depth - snode->depth)/2;
			}else{
				snode->x = x;
			}
			snode->y = y;
			switch (j){
			case 0:
				c.step1(emode,*snode);
				break;
			case 1:
				c.step2(emode,*snode);
				break;
			case 2:
				c.step3(emode,*snode);
				break;
			case 3:
				c.step4(emode,*snode);
				break;
			case 4:
				c.step5(emode,*snode);
				break;
			case 5:
				c.step6(emode,*snode);
				break;
			}
			if (j==0){
				node.left.x = snode->x;
				node.left.y = node.y + snode->width/2;
			}
			if (i==0){
				if (snode->width != 0){
					node.width += snode->width + 10;
					if (snode->depth > node.depth) node.depth = snode->depth;
				}
			}
			y += snode->width + 10;
		}
		if (mode == GR_EVAL){
			break;
		}else if (emode == GR_DRAW){
			for (int j=0; j<5; j++){
				GR_NODE *ptn1 = tbnode + j;
				GR_NODE *ptn2 = ptn1 + 1;
				if (ptn1->width != 0 && ptn2->width != 0){
					switch (j){
					case 0:
						c.link1 (*ptn1,*ptn2);
						break;
					case 1:
						c.link2 (*ptn1,*ptn2);
						break;
					case 2:
						c.link3 (*ptn1,*ptn2);
						break;
					case 3:
						c.link4 (*ptn1,*ptn2);
						break;
					case 4:
						c.link5 (*ptn1,*ptn2);
						break;
					}
				}
			}
		}

	}
}