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elinks/src/ecmascript/spidermonkey.c

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/* The SpiderMonkey ECMAScript backend. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "elinks.h"
#include "ecmascript/spidermonkey/util.h"
#include "bfu/dialog.h"
#include "cache/cache.h"
#include "config/options.h"
#include "cookies/cookies.h"
#include "dialogs/menu.h"
#include "dialogs/status.h"
#include "document/html/frames.h"
#include "document/document.h"
#include "document/forms.h"
#include "document/view.h"
#include "ecmascript/ecmascript.h"
#include "ecmascript/spidermonkey.h"
#include "ecmascript/spidermonkey/document.h"
#include "ecmascript/spidermonkey/form.h"
#include "ecmascript/spidermonkey/heartbeat.h"
#include "ecmascript/spidermonkey/location.h"
#include "ecmascript/spidermonkey/navigator.h"
#include "ecmascript/spidermonkey/unibar.h"
#include "ecmascript/spidermonkey/window.h"
#include "intl/gettext/libintl.h"
#include "main/select.h"
#include "osdep/newwin.h"
#include "osdep/sysname.h"
#include "protocol/http/http.h"
#include "protocol/uri.h"
#include "session/history.h"
#include "session/location.h"
#include "session/session.h"
#include "session/task.h"
#include "terminal/tab.h"
#include "terminal/terminal.h"
#include "util/conv.h"
#include "util/string.h"
#include "viewer/text/draw.h"
#include "viewer/text/form.h"
#include "viewer/text/link.h"
#include "viewer/text/vs.h"
/*** Global methods */
/* TODO? Are there any which need to be implemented? */
static int js_module_init_ok;
static void
error_reporter(JSContext *ctx, const char *message, JSErrorReport *report)
{
struct ecmascript_interpreter *interpreter = JS_GetContextPrivate(ctx);
struct session *ses = interpreter->vs->doc_view->session;
struct terminal *term;
unsigned char *strict, *exception, *warning, *error;
struct string msg;
assert(interpreter && interpreter->vs && interpreter->vs->doc_view
&& ses && ses->tab);
if_assert_failed goto reported;
term = ses->tab->term;
#ifdef CONFIG_LEDS
set_led_value(ses->status.ecmascript_led, 'J');
#endif
if (!get_opt_bool("ecmascript.error_reporting", ses)
|| !init_string(&msg))
goto reported;
strict = JSREPORT_IS_STRICT(report->flags) ? " strict" : "";
exception = JSREPORT_IS_EXCEPTION(report->flags) ? " exception" : "";
warning = JSREPORT_IS_WARNING(report->flags) ? " warning" : "";
error = !report->flags ? " error" : "";
add_format_to_string(&msg, _("A script embedded in the current "
"document raised the following%s%s%s%s", term),
strict, exception, warning, error);
add_to_string(&msg, ":\n\n");
add_to_string(&msg, message);
if (report->linebuf && report->tokenptr) {
int pos = report->tokenptr - report->linebuf;
add_format_to_string(&msg, "\n\n%s\n.%*s^%*s.",
report->linebuf,
pos - 2, " ",
strlen(report->linebuf) - pos - 1, " ");
}
info_box(term, MSGBOX_FREE_TEXT, N_("JavaScript Error"), ALIGN_CENTER,
msg.source);
reported:
/* Im clu'les. --pasky */
JS_ClearPendingException(ctx);
}
#if !defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT) && defined(HAVE_JS_SETBRANCHCALLBACK)
static JSBool
safeguard(JSContext *ctx, JSScript *script)
{
struct ecmascript_interpreter *interpreter = JS_GetContextPrivate(ctx);
struct session *ses = interpreter->vs->doc_view->session;
int max_exec_time = get_opt_int("ecmascript.max_exec_time", ses);
if (time(NULL) - interpreter->exec_start > max_exec_time) {
struct terminal *term = ses->tab->term;
/* A killer script! Alert! */
ecmascript_timeout_dialog(term, max_exec_time);
return JS_FALSE;
}
return JS_TRUE;
}
static void
setup_safeguard(struct ecmascript_interpreter *interpreter,
JSContext *ctx)
{
interpreter->exec_start = time(NULL);
JS_SetBranchCallback(ctx, safeguard);
}
#endif
static void
spidermonkey_init(struct module *xxx)
{
js_module_init_ok = spidermonkey_runtime_addref();
}
static void
spidermonkey_done(struct module *xxx)
{
if (js_module_init_ok)
spidermonkey_runtime_release();
}
void *
spidermonkey_get_interpreter(struct ecmascript_interpreter *interpreter)
{
JSContext *ctx;
JSObject *window_obj, *document_obj, *forms_obj, *history_obj, *location_obj,
*statusbar_obj, *menubar_obj, *navigator_obj;
assert(interpreter);
if (!js_module_init_ok) return NULL;
ctx = JS_NewContext(spidermonkey_runtime,
8192 /* Stack allocation chunk size */);
if (!ctx)
return NULL;
interpreter->backend_data = ctx;
JS_SetContextPrivate(ctx, interpreter);
JS_SetOptions(ctx, JSOPTION_VAROBJFIX | JSOPTION_JIT | JSOPTION_METHODJIT);
JS_SetVersion(ctx, JSVERSION_LATEST);
JS_SetErrorReporter(ctx, error_reporter);
#if defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT)
JS_SetOperationCallback(ctx, heartbeat_callback);
#endif
window_obj = JS_NewCompartmentAndGlobalObject(ctx, (JSClass *) &window_class, NULL);
if (!window_obj) goto release_and_fail;
if (!JS_InitStandardClasses(ctx, window_obj)) goto release_and_fail;
if (!JS_DefineProperties(ctx, window_obj, (JSPropertySpec *) window_props))
goto release_and_fail;
if (!spidermonkey_DefineFunctions(ctx, window_obj, window_funcs))
goto release_and_fail;
if (!JS_SetPrivate(ctx, window_obj, interpreter->vs)) /* to @window_class */
goto release_and_fail;
document_obj = spidermonkey_InitClass(ctx, window_obj, NULL,
(JSClass *) &document_class, NULL, 0,
(JSPropertySpec *) document_props,
document_funcs,
NULL, NULL);
if (!document_obj) goto release_and_fail;
forms_obj = spidermonkey_InitClass(ctx, document_obj, NULL,
(JSClass *) &forms_class, NULL, 0,
(JSPropertySpec *) forms_props,
forms_funcs,
NULL, NULL);
if (!forms_obj) goto release_and_fail;
history_obj = spidermonkey_InitClass(ctx, window_obj, NULL,
(JSClass *) &history_class, NULL, 0,
(JSPropertySpec *) NULL,
history_funcs,
NULL, NULL);
if (!history_obj) goto release_and_fail;
location_obj = spidermonkey_InitClass(ctx, window_obj, NULL,
(JSClass *) &location_class, NULL, 0,
(JSPropertySpec *) location_props,
location_funcs,
NULL, NULL);
if (!location_obj) goto release_and_fail;
menubar_obj = JS_InitClass(ctx, window_obj, NULL,
(JSClass *) &menubar_class, NULL, 0,
(JSPropertySpec *) unibar_props, NULL,
NULL, NULL);
if (!menubar_obj) goto release_and_fail;
if (!JS_SetPrivate(ctx, menubar_obj, "t")) /* to @menubar_class */
goto release_and_fail;
statusbar_obj = JS_InitClass(ctx, window_obj, NULL,
(JSClass *) &statusbar_class, NULL, 0,
(JSPropertySpec *) unibar_props, NULL,
NULL, NULL);
if (!statusbar_obj) goto release_and_fail;
if (!JS_SetPrivate(ctx, statusbar_obj, "s")) /* to @statusbar_class */
goto release_and_fail;
navigator_obj = JS_InitClass(ctx, window_obj, NULL,
(JSClass *) &navigator_class, NULL, 0,
(JSPropertySpec *) navigator_props, NULL,
NULL, NULL);
if (!navigator_obj) goto release_and_fail;
return ctx;
release_and_fail:
spidermonkey_put_interpreter(interpreter);
return NULL;
}
void
spidermonkey_put_interpreter(struct ecmascript_interpreter *interpreter)
{
JSContext *ctx;
assert(interpreter);
if (!js_module_init_ok) return;
ctx = interpreter->backend_data;
JS_DestroyContext(ctx);
interpreter->backend_data = NULL;
}
void
spidermonkey_eval(struct ecmascript_interpreter *interpreter,
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struct string *code, struct string *ret)
{
JSContext *ctx;
jsval rval;
assert(interpreter);
if (!js_module_init_ok) return;
ctx = interpreter->backend_data;
#if defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT)
interpreter->heartbeat = add_heartbeat(interpreter);
#elif defined(HAVE_JS_SETBRANCHCALLBACK)
setup_safeguard(interpreter, ctx);
#endif
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interpreter->ret = ret;
JS_EvaluateScript(ctx, JS_GetGlobalObject(ctx),
code->source, code->length, "", 0, &rval);
#if defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT)
done_heartbeat(interpreter->heartbeat);
#endif
}
unsigned char *
spidermonkey_eval_stringback(struct ecmascript_interpreter *interpreter,
struct string *code)
{
JSBool ret;
JSContext *ctx;
jsval rval;
assert(interpreter);
if (!js_module_init_ok) return NULL;
ctx = interpreter->backend_data;
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interpreter->ret = NULL;
#if defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT)
interpreter->heartbeat = add_heartbeat(interpreter);
#elif defined(HAVE_JS_SETBRANCHCALLBACK)
setup_safeguard(interpreter, ctx);
#endif
ret = JS_EvaluateScript(ctx, JS_GetGlobalObject(ctx),
code->source, code->length, "", 0, &rval);
#if defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT)
done_heartbeat(interpreter->heartbeat);
#endif
if (ret == JS_FALSE) {
return NULL;
}
if (JSVAL_IS_VOID(rval) || JSVAL_IS_NULL(rval)) {
/* Undefined value. */
return NULL;
}
return stracpy(jsval_to_string(ctx, &rval));
}
int
spidermonkey_eval_boolback(struct ecmascript_interpreter *interpreter,
struct string *code)
{
JSContext *ctx;
JSFunction *fun;
jsval rval;
int ret;
assert(interpreter);
if (!js_module_init_ok) return 0;
ctx = interpreter->backend_data;
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interpreter->ret = NULL;
fun = JS_CompileFunction(ctx, NULL, "", 0, NULL, code->source,
code->length, "", 0);
if (!fun)
return -1;
#if defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT)
interpreter->heartbeat = add_heartbeat(interpreter);
#elif defined(HAVE_JS_SETBRANCHCALLBACK)
setup_safeguard(interpreter, ctx);
#endif
ret = JS_CallFunction(ctx, NULL, fun, 0, NULL, &rval);
#if defined(CONFIG_ECMASCRIPT_SMJS_HEARTBEAT)
done_heartbeat(interpreter->heartbeat);
#endif
if (ret == 2) { /* onClick="history.back()" */
return 0;
}
if (ret == JS_FALSE) {
return -1;
}
if (JSVAL_IS_VOID(rval)) {
/* Undefined value. */
return -1;
}
return jsval_to_boolean(ctx, &rval);
}
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struct module spidermonkey_module = struct_module(
/* name: */ N_("SpiderMonkey"),
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/* options: */ NULL,
/* events: */ NULL,
/* submodules: */ NULL,
/* data: */ NULL,
/* init: */ spidermonkey_init,
/* done: */ spidermonkey_done
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);