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/*
netrik -- The ANTRIK Internet Viewer
Copyright (C) Olaf D. Buddenhagen AKA antrik, et al (see AUTHORS)
Published under the GNU GPL; see LICENSE for details.
*/
/*
* items.h -- all data structures etc. related to processing the item tree.
*
* (C) 2001, 2002, 2003 antrik
* 2002 Patrice Neff
*/
#ifndef __items_h
#define __items_h
struct Data_string { /* Pascal-like string (for storing binary data that can contain '\0' as a legal value, e.g. form data) */
char *data; /* char array (*not* zero-terminated string!) */
int size;
};
/* update list in dump_items (in render.c) also! */
enum Item_type {
ITEM_TEXT, /* text block consisting of one string of continous text */
ITEM_BOX, /* box containing other items */
ITEM_FORM, /* box with additional form data */
ITEM_BLANK, /* blank line */
ITEM_BLOCK_ANCHOR, /* virtual block, stored after its children, but at same level */
ITEM_INLINE_ANCHOR /* virtual sub-item (string section), stored after its parent (the string item), at same level */
};
/* continuous text stream (possibly changing attributes) */
struct String {
char *text;
int div_count; /* number of attribute divisions */
struct Div { /* data of divisions */
int end; /* position *after* end (beginning of next div) */
int color; /* color of text in division */
} *div; /* array of divisions */
int *line_table; /* array of positions of line breaks after formating */
int link_count; /* number of links in text block */
struct Link { /* link data */
int start; /* starting position (relatively to beginning of string) */
int end;
int x_start, y_start, x_end, y_end; /* page coordinates */
struct Data_string
value; /* link URL/form data (NOTE: the "size" component is used *only* for form values presently; for normal links, only the "data" component is uses as a normal C string!) */
enum Form_control { /* type of link/form element */
FORM_NO=0, /* no form -- normal link */
FORM_TEXT, /* text input field */
FORM_PASS, /* concealed text input field */
FORM_HIDDEN, /* invisible text field (doesn't make much sense without scripting, but still...) */
FORM_CHECKBOX,
FORM_RADIO,
FORM_OPTION, /* <select> option */
FORM_MULTIOPTION, /* <select "multiple"> option */
FORM_TEXTAREA,
FORM_FILE,
FORM_SUBMIT /* button */
} form;
char *name; /* "name" in form controls */
int enabled; /* form control can be submitted to server */
/* hashes for identifying link if page changes */
int url_fingerprint; /* link value */
int text_fingerprint; /* link element content */
} *link; /* array of links */
};
struct Block_anchor {
struct Item *virtual_child; /* points back to first child of the virtual block (the virtual block spans up to the anchor item) */
char *id; /* anchor name */
};
struct Inline_anchor {
struct Item *virtual_parent; /* points back to the virtual parent (text item) containing this anchor */
int start; /* beginning of anchor inside string */
int end;
char *id; /* anchor name */
};
struct Form {
enum Form_method {
METHOD_GET, /* as part of URL */
METHOD_POST_URLENC, /* in body of HTTP request, URL encoded (application/x-www-form-urlencoded) */
METHOD_POST_MIMEENC /* body, multipart MIME encoded (multipart/form-data) */
} method; /* how to submit */
char *url; /* where to submit ("action") */
};
/* complete item data in structure tree */
struct Item {
struct Item *next; /* next item at same tree level */
struct Item *list_next; /* next item in linear list */
struct Item *parent; /* item in whose area this one is contained */
struct Item *first_child; /* first item in this one's area (others accesed by "next") */
int center;
int x_start, x_end, y_start, y_end; /* position in page */
enum Item_type type; /* kind of item */
union {
struct String *string; /* text data, if ITEM_TEXT */
struct Block_anchor *block_anchor;
struct Inline_anchor *inline_anchor;
struct Form *form;
} data; /* item-type specific data */
};
enum Text_mode {
TM_NORMAL,
TM_DIM, /* "hidden" form controls etc. */
TM_ITALIC,
TM_LINK,
TM_FORM,
TM_IMG,
TM_SYS, /* special text generated by netrik itself */
TM_ACTIVE /* highlighted (active) link */
};
struct Item_list { /* all items present in one line of output page */
int count; /* number of items in line */
struct Item **item; /* array of pointers to items */
};
struct Link_list { /* all links on page */
int count;
struct Link_ptr { /* pointers to links */
struct Item *item; /* item containing string with link */
int num; /* number of link inside this string */
} *link; /* array of link pointers */
};
struct Anchor_list { /* all anchors on page */
int count;
struct Item **anchor_item; /* array of pointers to the anchors in the item tree */
};
/* items.c */
int line_start(const struct Item *item, int line); /* get starting position inside text block */
int line_end(const struct Item *item, int line); /* get ending position inside text block */
int line_pos(const struct Item *item, int line); /* get x position on page */
/* pre-render.c */
struct Item_list *pre_render(struct Item *item_tree, int width); /* place all items on output page */
void free_map(struct Item *item_tree, struct Item_list *page_map); /* unallocate page usage map */
#endif
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