htmltable.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
 
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define FIXED_FLAG 1
#define HALIGN_RIGHT (1 << 1)
#define HALIGN_LEFT (1 << 2)
#define HALIGN_MASK (HALIGN_RIGHT | HALIGN_LEFT)
#define HALIGN_TEXT HALIGN_MASK
#define VALIGN_TOP (1 << 3)
#define VALIGN_BOTTOM (1 << 4)
#define VALIGN_MASK (VALIGN_TOP | VALIGN_BOTTOM)
#define BORDER_SET (1 << 5)
#define PAD_SET (1 << 6)
#define SPACE_SET (1 << 7)
#define BALIGN_RIGHT (1 << 8)
#define BALIGN_LEFT (1 << 9)
#define BALIGN_MASK (BALIGN_RIGHT | BALIGN_LEFT)
#define BORDER_LEFT (1 << 10)
#define BORDER_TOP (1 << 11)
#define BORDER_RIGHT (1 << 12)
#define BORDER_BOTTOM (1 << 13)
#define BORDER_MASK (BORDER_LEFT|BORDER_TOP|BORDER_RIGHT|BORDER_BOTTOM)
 
#define UNSET_ALIGN 0
 
    /* spans of text within a cell
     * NOTE: As required, the str field in span is utf-8.
     * This translation is done when libexpat scans the input.
     */
        
    /* line of textspan_t's */
    typedef struct {
        textspan_t *items;
        size_t nitems;
        char just;
        double size;   /* width of span */
        double lfsize; /* offset from previous baseline to current one */
    } htextspan_t;
        
    typedef struct {
        htextspan_t *spans;
        size_t nspans;
        char simple;
        boxf box;
    } htmltxt_t;
 
    typedef struct {
        boxf box;
        char *src;
        char *scale;
    } htmlimg_t;
 
    typedef struct {
        bool radial: 1;
        bool rounded: 1;
        bool invisible: 1;
        bool dotted: 1;
        bool dashed: 1;
    } htmlstyle_t;
 
    typedef struct {
        char *href;             /* pointer to an external resource */
        char *port;
        char *target;
        char *title;
        char *id;
        char *bgcolor;
        char *pencolor;
        int gradientangle;
        signed char space;
        unsigned char border;
        unsigned char pad;
        unsigned char sides;    /* set of sides exposed to field */
        unsigned short flags;
        unsigned short width;
        unsigned short height;
        htmlstyle_t style;
        boxf box;               /* its geometric placement in points */
    } htmldata_t;
 
#define HTML_UNSET 0
#define HTML_TBL 1
#define HTML_TEXT 2
#define HTML_IMAGE 3
 
#define HTML_VRULE 1
#define HTML_HRULE 2
 
    typedef struct htmlcell_t htmlcell_t;
    typedef struct htmltbl_t htmltbl_t;
        
    struct htmltbl_t {
        htmldata_t data;
        union {
            struct {
                htmlcell_t *parent;     /* enclosing cell */
                htmlcell_t **cells;     /* cells */
            } n;
            struct {
                htmltbl_t *prev;        /* stack */
                Dt_t *rows;     /* cells */
            } p;
        } u;
        int8_t cellborder;
        double *heights; 
        double *widths; 
        size_t row_count; 
        size_t column_count; 
        textfont_t *font;       /* font info */
        bool hrule:1; 
        bool vrule:1; 
    };
 
    struct htmllabel_t {
        union {
            htmltbl_t *tbl;
            htmltxt_t *txt;
            htmlimg_t *img;
        } u;
        char kind;
    };
 
    struct htmlcell_t {
        htmldata_t data;
        uint16_t colspan;
        uint16_t rowspan;
        uint16_t col;
        uint16_t row;
        htmllabel_t child;
        htmltbl_t *parent;
        unsigned char ruled;
    };
 
/* During parsing, table contents are stored as rows of cells.
 * A row is a list of cells
 * Rows is a list of rows.
 * pitems are used for both lists.
 */
    typedef struct {
        Dtlink_t link;
        union {
            Dt_t *rp;
            htmlcell_t *cp;
        } u;
        unsigned char ruled;
    } pitem;
        
    typedef struct {
        pointf pos;
        textfont_t finfo;
        void *obj;
        graph_t *g;
        char *imgscale;
        char *objid;
        bool objid_set;
    } htmlenv_t;
 
    extern htmllabel_t *parseHTML(char *, int *, htmlenv_t *);
 
    extern int make_html_label(void *obj, textlabel_t * lp);
    extern void emit_html_label(GVJ_t * job, htmllabel_t * lp, textlabel_t *);
 
    extern void free_html_label(htmllabel_t *, int);
    extern void free_html_data(htmldata_t *);
    extern void free_html_text(htmltxt_t *);
 
    extern boxf *html_port(node_t *n, char *pname, unsigned char *sides);
 
#ifdef __cplusplus
}
#endif