block.h

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/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
#pragma once
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include  <circogen/nodelist.h>
 
    typedef struct block block_t;
 
    typedef struct {
        block_t *first;
        block_t *last;
    } blocklist_t;
 
    struct block {
        Agnode_t *child;        /* if non-null, points to node in parent block */
        block_t *next;          /* sibling block */
        Agraph_t *sub_graph;    /* nodes and edges in this block */
        double radius;          /* radius of block and subblocks */
        double rad0;            /* radius of block */
        nodelist_t circle_list; /* ordered list of nodes in block */
        blocklist_t children;   /* child blocks */
        double parent_pos;      /* if block has 1 node, angle to place parent */
        int flags;
    };
 
    extern block_t *mkBlock(Agraph_t *);
    extern void freeBlock(block_t * sp);
    extern int blockSize(block_t * sp);
 
    extern void initBlocklist(blocklist_t *);
    extern void appendBlock(blocklist_t * sp, block_t * sn);
    extern void insertBlock(blocklist_t * sp, block_t * sn);
 
#ifdef DEBUG
    extern void printBlocklist(blocklist_t * snl);
#endif
 
#define CHILD(b) ((b)->child)
#define BLK_PARENT(b) (CHILD(b)? PARENT(CHILD(b)) : 0)
#define BLK_FLAGS(b) ((b)->flags)
 
#define COALESCED_F   (1 << 0)
#define COALESCED(b) (BLK_FLAGS(b)&COALESCED_F)
#define SET_COALESCED(b) (BLK_FLAGS(b) |= COALESCED_F)
 
#ifdef __cplusplus
}
#endif