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Diffstat (limited to 'src/devices/grohtml/html-text.h')
| -rw-r--r-- | src/devices/grohtml/html-text.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/devices/grohtml/html-text.h b/src/devices/grohtml/html-text.h new file mode 100644 index 0000000..ee58601 --- /dev/null +++ b/src/devices/grohtml/html-text.h @@ -0,0 +1,138 @@ +// -*- 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); +}; |