/*************************************************************************
 * 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
 *************************************************************************/

/* Common header used by both clients and plugins */

#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#include "cdt.h"
#include "gvcommon.h"
#include "gvcjob.h"
#include "color.h"
#include <stdbool.h>

#ifdef GVDLL
#ifdef GVC_EXPORTS
#define GVCINT_API __declspec(dllexport)
#else
#define GVCINT_API __declspec(dllimport)
#endif
#endif

#ifndef GVCINT_API
#define GVCINT_API /* nothing */
#endif

    /* active plugin headers */
    typedef struct gvplugin_active_layout_s {
        gvlayout_engine_t *engine;
        int id;
        gvlayout_features_t *features;
        const char *type;
    } gvplugin_active_layout_t;

    typedef struct gvplugin_active_textlayout_s {
        gvtextlayout_engine_t *engine;
        int id;
        char *type;
    } gvplugin_active_textlayout_t;

    typedef struct gvplugin_package_s gvplugin_package_t;

    struct gvplugin_package_s {
        gvplugin_package_t *next;
        char *path;
        char *name;
    };

    struct gvplugin_available_s {
	gvplugin_available_t *next;     /* next plugin in linked list, or NULL */
	char *typestr;		/* type string, e.g. "png" or "ps" */
	int quality;			/* Programmer assigned quality ranking within type (+ve or -ve int).
					First implementation of type should be given "0" quality */
	gvplugin_package_t *package;	/* details of library containing plugin */
	gvplugin_installed_t *typeptr;  /* pointer to jumptable for plugin,
					or NULL if not yet loaded */
    };

    struct GVG_s {
	GVC_t *gvc;	/* parent gvc */
	GVG_t *next;	/* next gvg in list */

	char *input_filename; /* or NULL if stdin */
	int graph_index;  /* index of graph within input_file */
	graph_t *g;
    };

#define MAXNEST 4

    struct GVC_s {
	GVCOMMON_t common;

	char *config_path;
	bool config_found;

	/* gvParseArgs */
	char **input_filenames; /* null terminated array of input filenames */
	int fidx; /* index of input_filenames to be processed next */

	/* gvNextInputGraph() */
	GVG_t *gvgs;	/* linked list of graphs */
	GVG_t *gvg;	/* current graph */

	/* plugins */
#define ELEM(x) +1
	/* APIS expands to "+1 +1 ... +1" to give the number of APIs */
	gvplugin_available_t *apis[ APIS ]; /* array of linked-list of plugins per api */
	gvplugin_available_t *api[ APIS ];  /* array of current plugins per api */
#undef ELEM
	gvplugin_package_t *packages;   /* list of available packages */

        /* externally provided write() displine */
	size_t (*write_fn) (GVJ_t *job, const char *s, size_t len);

	/* fonts and textlayout */
	Dtdisc_t textfont_disc;
	Dt_t *textfont_dt;
	gvplugin_active_textlayout_t textlayout; /* always use best avail for all jobs */
//	void (*free_layout) (void *layout);   /* function for freeing layouts (mostly used by pango) */
	
/* FIXME - everything below should probably move to GVG_t */

	/* gvrender_config() */
	GVJ_t *jobs;	/* linked list of jobs */
	GVJ_t *job;	/* current job */

	graph_t *g;      /* current graph */

	/* gvrender_begin_job() */
	gvplugin_active_layout_t layout;

	char *graphname;	/* name from graph */
	GVJ_t *active_jobs;   /* linked list of active jobs */

	/* pagination */
	char *pagedir;		/* pagination order */
	pointf margin;		/* margins in graph units */
	pointf pad;		/* pad in graph units */
	pointf pageSize;	/* pageSize in graph units, not including margins */
	point pb;		/* page size - including margins (inches) */
	boxf bb;		/* graph bb in graph units, not including margins */
	int rotation;		/* rotation - 0 = portrait, 90 = landscape */
	bool graph_sets_pad, graph_sets_margin, graph_sets_pageSize;

	/* layers */
	char *layerDelims;	/* delimiters in layer names */
	char *layerListDelims;	/* delimiters between layer ranges */ 
	char *layers;		/* null delimited list of layer names */
	char **layerIDs;	/* array of layer names */
	int numLayers;		/* number of layers */
	int *layerlist;

	/* default font */
	char *defaultfontname;
	double defaultfontsize;

	/* default line style */
	char **defaultlinestyle;

	/* render defaults set from graph */
	gvcolor_t bgcolor;	/* background color */

	/* whether to mangle font names (at least in SVG), usually false */
	int fontrenaming;
    };

GVCINT_API GVC_t* gvCloneGVC (GVC_t *);
GVCINT_API void gvFreeCloneGVC (GVC_t *);

#ifdef _WIN32
#define DIRSEP "\\"
#else
#define DIRSEP "/"
#endif

#undef GVCINT_API

#ifdef __cplusplus
}
#endif