src/document/html/internal.h

   1
   2 #ifndef EL__DOCUMENT_HTML_INTERNAL_H
   3 #define EL__DOCUMENT_HTML_INTERNAL_H
   4
   5 #include "document/css/stylesheet.h"
   6 #include "document/html/parser.h"
   7 #include "util/lists.h"
   8
   9 struct document_options;
  10 struct uri;
  11
  12 /* For parser/parse.c: */
  13
  14 void process_head(struct html_context *html_context, unsigned char *head);
  15 void put_chrs(struct html_context *html_context, unsigned char *start, int len);
  16
  17 enum html_whitespace_state {
  18         /* Either we are starting a new "block" or the last segment of the
  19          * current "block" is ending with whitespace and we should eat any
  20          * leading whitespace of the next segment passed to put_chrs().
  21          * This prevents HTML whitespace from indenting new blocks by one
  22          * or creating two consecutive segments of whitespace in the middle
  23          * of a block. */
  24         HTML_SPACE_SUPPRESS,
  25
  26         /* Do not do anything special.  */
  27         HTML_SPACE_NORMAL,
  28
  29         /* We should add a space when we start the next segment if it doesn't
  30          * already start with whitespace. This is used in an "x  </y>  z"
  31          * scenario when the parser hits </y>: it renders "x" and sets this,
  32          * so that it will then render " z". XXX: Then we could of course
  33          * render "x " and set -1. But we test for this value in parse_html()
  34          * if we hit an opening tag of an element and potentially
  35          * put_chrs(" "). That needs more investigation yet. --pasky */
  36         HTML_SPACE_ADD,
  37 };
  38
  39 struct html_context {
  40 #ifdef CONFIG_CSS
  41         /* The default stylesheet is initially merged into it. When parsing CSS
  42          * from <style>-tags and external stylesheets if enabled is merged
  43          * added to it. */
  44         struct css_stylesheet css_styles;
  45 #endif
  46
  47         /* These are global per-document base values, alterable by the <base>
  48          * element. */
  49         struct uri *base_href;
  50         unsigned char *base_target;
  51
  52         struct document_options *options;
  53
  54         /* doc_cp is the charset of the document, i.e. part->document->cp.
  55          * It is copied here because part->document is NULL sometimes.  */
  56         int doc_cp;
  57
  58         /* For:
  59          * html/parser/parse.c
  60          * html/parser/stack.c
  61          * html/parser.c */
  62         struct list_head stack;
  63
  64         /* For parser/parse.c: */
  65         unsigned char *eoff; /* For parser/forms.c too */
  66         int line_breax; /* This is for ln_break. */
  67         int position; /* This is the position on the document canvas relative
  68                        * to the current line and is maintained by put_chrs. */
  69         enum html_whitespace_state putsp; /* This is for the put_chrs
  70                                            * state-machine. */
  71         int was_li;
  72
  73         unsigned int quote_level; /* Nesting level of <q> tags. See @html_quote
  74                                    * for why this is unsigned. */
  75
  76         unsigned int was_br:1;
  77         unsigned int was_xmp:1;
  78         unsigned int was_style:1;
  79         unsigned int has_link_lines:1;
  80         unsigned int was_body:1; /* For META refresh inside <body>. */
  81         unsigned int was_body_background:1; /* For <HTML> with style. */
  82
  83         /* For html/parser.c, html/renderer.c */
  84         int margin;
  85
  86         /* For parser/forms.c: */
  87         unsigned char *startf;
  88
  89         /* For:
  90          * html/parser/parse.c
  91          * html/parser.c
  92          * html/renderer.c
  93          * html/tables.c */
  94         int table_level;
  95
  96         /* For:
  97          * html/parser/forms.c
  98          * html/parser/link.c
  99          * html/parser/parse.c
 100          * html/parser/stack.c
 101          * html/parser.c */
 102         struct part *part;
 103
 104         /* For:
 105          * html/parser/forms.c
 106          * html/parser/link.c
 107          * html/parser/parse.c
 108          * html/parser.c */
 109         /* Note that this is for usage by put_chrs only; anywhere else in
 110          * the parser, one should use put_chrs. */
 111         void (*put_chars_f)(struct html_context *, unsigned char *, int);
 112
 113         /* For:
 114          * html/parser/forms.c
 115          * html/parser/link.c
 116          * html/parser/parse.c
 117          * html/parser/stack.c
 118          * html/parser.c */
 119         void (*line_break_f)(struct html_context *);
 120
 121         /* For:
 122          * html/parser/forms.c
 123          * html/parser/parse.c
 124          * html/parser.c */
 125         void *(*special_f)(struct html_context *, enum html_special_type, ...);
 126 };
 127
 128 #define html_top        ((struct html_element *) html_context->stack.next)
 129 #define html_bottom     ((struct html_element *) html_context->stack.prev)
 130 #define format          (html_top->attr)
 131 #define par_format      (html_top->parattr)
 132
 133 #define html_is_preformatted() (format.style.attr & AT_PREFORMATTED)
 134
 135 #define get_html_max_width() \
 136         int_max(par_format.width - (par_format.leftmargin + par_format.rightmargin), 0)
 137
 138 /* For parser/link.c: */
 139
 140 void html_focusable(struct html_context *html_context, unsigned char *a);
 141 void html_skip(struct html_context *html_context, unsigned char *a);
 142 unsigned char *get_target(struct document_options *options, unsigned char *a);
 143
 144 void
 145 import_css_stylesheet(struct css_stylesheet *css, struct uri *base_uri,
 146                       unsigned char *url, int len);
 147
 148 #endif