gvcint.h

Go to the documentation of this file.

/* $Id$ $Revision$ */
/* vim:set shiftwidth=4 ts=8: */

/*************************************************************************
 * 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
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: See CVS logs. Details at http://www.graphviz.org/
 *************************************************************************/

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

#ifndef GVCINT_H
#define GVCINT_H

#ifdef __cplusplus
extern "C" {
#endif

#include "cdt.h"
#include "gvcommon.h"
#include "color.h"

    /* 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 */
        const 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;
        boolean config_found;

        /* gvParseArgs */
        char **input_filenames; /* null terminated array of input filenames */

        /* 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 */
        boolean graph_sets_pad, graph_sets_margin, graph_sets_pageSize, graph_sets_rotation;

        /* 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;
    };

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

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

#ifdef __cplusplus
}
#endif
#endif                          /* GVCINT_H */