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elinks/src/ecmascript/ecmascript.h
2022-10-13 15:53:54 +02:00

208 lines
6.1 KiB
C

#ifndef EL__ECMASCRIPT_ECMASCRIPT_H
#define EL__ECMASCRIPT_ECMASCRIPT_H
/* This is a trivial ECMAScript driver. All your base are belong to pasky. */
/* In the future you will get DOM, a complete ECMAScript interface and free
* plasm displays for everyone. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef CONFIG_ECMASCRIPT_SMJS
#include <jsapi.h>
#endif
#ifdef CONFIG_QUICKJS
#include <quickjs/quickjs.h>
#endif
#ifdef CONFIG_MUJS
#include <mujs.h>
#endif
#ifdef CONFIG_ECMASCRIPT
#include "main/module.h"
#include "main/timer.h"
#include "util/time.h"
//#define ECMASCRIPT_DEBUG 1
#ifdef ECMASCRIPT_DEBUG
#include <stdio.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
struct document_view;
struct form_state;
struct form_view;
struct string;
struct terminal;
struct uri;
struct view_state;
struct ecmascript_interpreter {
struct view_state *vs;
void *backend_data;
/* Nesting level of calls to backend functions. When this is
* nonzero, there are references to backend_data in the C
* stack, so it is not safe to free the data yet. */
int backend_nesting;
/* Used by document.write() */
struct string *ret;
/* The code evaluated by setTimeout() */
struct string code;
struct heartbeat *heartbeat;
/* This is a cross-rerenderings accumulator of
* @document.onload_snippets (see its description for juicy details).
* They enter this list as they continue to appear there, and they
* never leave it (so that we can always find from where to look for
* any new snippets in document.onload_snippets). Instead, as we
* go through the list we maintain a pointer to the last processed
* entry. */
LIST_OF(struct string_list_item) onload_snippets;
struct string_list_item *current_onload_snippet;
/* ID of the {struct document} where those onload_snippets belong to.
* It is kept at 0 until it is definitively hard-attached to a given
* final document. Then if we suddenly appear with this structure upon
* a document with a different ID, we reset the state and start with a
* fresh one (normally, that does not happen since reloading sets
* ecmascript_fragile, but it can happen i.e. when the urrent document
* is reloaded in another tab and then you just cause the current tab
* to redraw. */
unsigned int onload_snippets_cache_id;
void *ac;
void *ac2;
#ifdef CONFIG_QUICKJS
JSValue document_obj;
JSValue location_obj;
#else
void *document_obj;
void *location_obj;
#endif
#ifdef CONFIG_QUICKJS
JSValueConst fun;
#endif
#ifdef CONFIG_ECMASCRIPT_SMJS
JS::RootedValue fun;
#endif
#ifdef CONFIG_MUJS
const char *fun;
#endif
bool changed;
};
struct ecmascript_timeout {
LIST_HEAD(struct ecmascript_timeout);
struct string code;
#ifdef CONFIG_QUICKJS
JSValueConst fun;
#endif
#ifdef CONFIG_ECMASCRIPT_SMJS
JS::RootedValue fun;
#endif
#ifdef CONFIG_MUJS
js_State *ctx;
const char *fun;
#endif
struct ecmascript_interpreter *interpreter;
timer_id_T tid;
};
struct delayed_goto {
/* It might look more convenient to pass doc_view around but it could
* disappear during wild dances inside of frames or so. */
struct view_state *vs;
struct uri *uri;
};
/* Why is the interpreter bound to {struct view_state} instead of {struct
* document}? That's easy, because the script won't raid just inside of the
* document, but it will also want to generate pop-up boxes, adjust form
* contents (which is doc_view-specific) etc. Of course the cons are that we
* need to wait with any javascript code execution until we get bound to the
* view_state through document_view - that means we are going to re-render the
* document if it contains a <script> area full of document.write()s. And why
* not bound the interpreter to {struct document_view} then? Because it is
* reset for each rerendering, and it sucks to do all the magic to preserve the
* interpreter over the rerenderings (we tried). */
int ecmascript_check_url(char *url, char *frame);
void ecmascript_free_urls(struct module *module);
struct ecmascript_interpreter *ecmascript_get_interpreter(struct view_state*vs);
void ecmascript_put_interpreter(struct ecmascript_interpreter *interpreter);
int ecmascript_get_interpreter_count(void);
void ecmascript_detach_form_view(struct form_view *fv);
void ecmascript_detach_form_state(struct form_state *fs);
void ecmascript_moved_form_state(struct form_state *fs);
void ecmascript_reset_state(struct view_state *vs);
void ecmascript_eval(struct ecmascript_interpreter *interpreter, struct string *code, struct string *ret);
char *ecmascript_eval_stringback(struct ecmascript_interpreter *interpreter, struct string *code);
/* Returns -1 if undefined. */
int ecmascript_eval_boolback(struct ecmascript_interpreter *interpreter, struct string *code);
/* Takes line with the syntax javascript:<ecmascript code>. Activated when user
* follows a link with this synstax. */
void ecmascript_protocol_handler(struct session *ses, struct uri *uri);
void ecmascript_timeout_dialog(struct terminal *term, int max_exec_time);
void ecmascript_set_action(char **action, char *string);
timer_id_T ecmascript_set_timeout(struct ecmascript_interpreter *interpreter, char *code, int timeout);
#ifdef CONFIG_ECMASCRIPT_SMJS
timer_id_T ecmascript_set_timeout2(struct ecmascript_interpreter *interpreter, JS::HandleValue f, int timeout);
#endif
#ifdef CONFIG_QUICKJS
timer_id_T ecmascript_set_timeout2q(struct ecmascript_interpreter *interpreter, JSValue f, int timeout);
#endif
#ifdef CONFIG_MUJS
timer_id_T ecmascript_set_timeout2m(js_State *J, const char *handle, int timeout);
#endif
int get_ecmascript_enable(struct ecmascript_interpreter *interpreter);
void check_for_rerender(struct ecmascript_interpreter *interpreter, const char* text);
void toggle_ecmascript(struct session *ses);
void *document_parse(struct document *document);
void free_document(void *doc);
void location_goto(struct document_view *doc_view, char *url);
void location_goto_const(struct document_view *doc_view, const char *url);
extern char *console_error_filename;
extern char *console_log_filename;
extern char *local_storage_filename;
extern int local_storage_ready;
extern struct module ecmascript_module;
#ifdef __cplusplus
}
#endif
#endif
#endif