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// -*- C++ -*-
/* Copyright (C) 2000-2020 Free Software Foundation, Inc.
*
* Gaius Mulley (gaius@glam.ac.uk) wrote html-text.h
*
* html-text.h
*
* provides a state machine interface which generates html text.
*/
/*
This file is part of groff.
groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or
(at your option) any later version.
groff is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "html.h"
#include "html-table.h"
#define STYLE_VERTICAL_SPACE "1em"
/*
* supported html dialects.
*/
typedef enum {xhtml, html4} html_dialect;
/*
* html tags
*/
typedef enum {I_TAG, B_TAG, P_TAG, SUB_TAG, SUP_TAG, TT_TAG,
PRE_TAG, SMALL_TAG, BIG_TAG, BREAK_TAG,
COLOR_TAG} HTML_TAG;
typedef struct tag_definition {
HTML_TAG type;
void *arg1;
int text_emitted;
color col;
html_indent *indent;
tag_definition *next;
} tag_definition ;
/*
* the state of the current paragraph.
* It allows post-html.cpp to request font changes, paragraph start/end
* and emits balanced tags with a small amount of peephole optimization.
*/
class html_text {
public:
html_text (simple_output *op, html_dialect d);
~html_text (void);
void flush_text (void);
void do_emittext (const char *s, int length);
void do_italic (void);
void do_bold (void);
void do_roman (void);
void do_tt (void);
void do_pre (void);
void do_small (void);
void do_big (void);
void do_para (const char *arg, int space); // used for no indentation
void do_para (simple_output *op, const char *arg1,
int indentation, int pageoffset, int linelength,
int space);
void do_sup (void);
void do_sub (void);
void do_space (void);
void do_break (void);
void do_newline (void);
void do_table (const char *arg);
void done_bold (void);
void done_italic (void);
char *done_para (void);
void done_sup (void);
void done_sub (void);
void done_tt (void);
void done_pre (void);
void done_small (void);
void done_big (void);
void do_color (color *c);
void done_color (void);
int emitted_text (void);
int ever_emitted_text (void);
int starts_with_space (void);
int retrieve_para_space (void);
void emit_space (void);
int is_in_pre (void);
int uses_indent (void);
void remove_tag (HTML_TAG tag);
void remove_sub_sup (void);
void remove_para_align (void);
void remove_para_space (void);
char *get_alignment (void);
private:
tag_definition *stackptr; /* the current paragraph state */
tag_definition *lastptr; /* the end of the stack */
simple_output *out;
html_dialect dialect; /* which dialect of html? */
int space_emitted; /* just emitted a space? */
int current_indentation; /* current .in value */
int pageoffset; /* .po value */
int linelength; /* current line length */
int blank_para; /* have we ever written text? */
int start_space; /* does para start with a .sp */
html_indent *indent; /* our indent class */
int is_present (HTML_TAG t);
void end_tag (tag_definition *t);
void start_tag (tag_definition *t);
void do_para (const char *arg, html_indent *in, int space);
void push_para (HTML_TAG t);
void push_para (HTML_TAG t, void *arg, html_indent *in);
void push_para (color *c);
void do_push (tag_definition *p);
char *shutdown (HTML_TAG t);
void check_emit_text (tag_definition *t);
int remove_break (void);
void issue_tag (const char *tagname, const char *arg, int space=2);
void issue_color_begin (color *c);
void remove_def (tag_definition *t);
html_indent *remove_indent (HTML_TAG tag);
void dump_stack_element (tag_definition *p);
void dump_stack (void);
};
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