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netsurf/content/handlers/javascript/duktape/dukky.c
Daniel Silverstone 36d83668c2 Support Window as an event target for dukky 
Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>
2019-05-04 15:49:21 +01:00

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/*
* Copyright 2012 Vincent Sanders <vince@netsurf-browser.org>
* Copyright 2015 Daniel Dilverstone <dsilvers@netsurf-browser.org>
* Copyright 2016 Michael Drake <tlsa@netsurf-browser.org>
* Copyright 2016 John-Mark Bell <jmb@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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/>.
*/
/** \file
* Duktapeish implementation of javascript engine functions.
*/
#include <stdint.h>
#include <nsutils/time.h>
#include "netsurf/inttypes.h"
#include "utils/utils.h"
#include "utils/nsoption.h"
#include "utils/log.h"
#include "utils/corestrings.h"
#include "content/content.h"
#include "javascript/js.h"
#include "javascript/content.h"
#include "duktape/binding.h"
#include "duktape.h"
#include "dukky.h"
#include <dom/dom.h>
#define EVENT_MAGIC MAGIC(EVENT_MAP)
#define HANDLER_LISTENER_MAGIC MAGIC(HANDLER_LISTENER_MAP)
#define HANDLER_MAGIC MAGIC(HANDLER_MAP)
#define EVENT_LISTENER_JS_MAGIC MAGIC(EVENT_LISTENER_JS_MAP)
static duk_ret_t dukky_populate_object(duk_context *ctx, void *udata)
{
/* ... obj args protoname nargs */
int nargs = duk_get_int(ctx, -1);
duk_pop(ctx);
/* ... obj args protoname */
duk_get_global_string(ctx, PROTO_MAGIC);
/* .. obj args protoname prototab */
duk_insert(ctx, -2);
/* ... obj args prototab protoname */
duk_get_prop(ctx, -2);
/* ... obj args prototab {proto/undefined} */
if (duk_is_undefined(ctx, -1)) {
NSLOG(dukky, WARNING,
"RuhRoh, couldn't find a prototype, HTMLUnknownElement it is");
duk_pop(ctx);
duk_push_string(ctx, PROTO_NAME(HTMLUNKNOWNELEMENT));
duk_get_prop(ctx, -2);
}
/* ... obj args prototab proto */
duk_dup(ctx, -1);
/* ... obj args prototab proto proto */
duk_set_prototype(ctx, -(nargs+4));
/* ... obj[proto] args prototab proto */
duk_get_prop_string(ctx, -1, INIT_MAGIC);
/* ... obj[proto] args prototab proto initfn */
duk_insert(ctx, -(nargs+4));
/* ... initfn obj[proto] args prototab proto */
duk_pop_2(ctx);
/* ... initfn obj[proto] args */
NSLOG(dukky, DEEPDEBUG, "Call the init function");
duk_call(ctx, nargs + 1);
return 1; /* The object */
}
duk_ret_t dukky_create_object(duk_context *ctx, const char *name, int args)
{
duk_ret_t ret;
NSLOG(dukky, DEEPDEBUG, "name=%s nargs=%d", name + 2, args);
/* ... args */
duk_push_object(ctx);
/* ... args obj */
duk_push_object(ctx);
/* ... args obj handlers */
duk_put_prop_string(ctx, -2, HANDLER_LISTENER_MAGIC);
/* ... args obj */
duk_push_object(ctx);
/* ... args obj handlers */
duk_put_prop_string(ctx, -2, HANDLER_MAGIC);
/* ... args obj */
duk_insert(ctx, -(args+1));
/* ... obj args */
duk_push_string(ctx, name);
/* ... obj args name */
duk_push_int(ctx, args);
/* ... obj args name nargs */
if ((ret = duk_safe_call(ctx, dukky_populate_object, NULL, args + 3, 1))
!= DUK_EXEC_SUCCESS)
return ret;
NSLOG(dukky, DEEPDEBUG, "created");
return DUK_EXEC_SUCCESS;
}
duk_bool_t
dukky_push_node_stacked(duk_context *ctx)
{
int top_at_fail = duk_get_top(ctx) - 2;
/* ... nodeptr klass */
duk_get_global_string(ctx, NODE_MAGIC);
/* ... nodeptr klass nodes */
duk_dup(ctx, -3);
/* ... nodeptr klass nodes nodeptr */
duk_get_prop(ctx, -2);
/* ... nodeptr klass nodes node/undefined */
if (duk_is_undefined(ctx, -1)) {
/* ... nodeptr klass nodes undefined */
duk_pop(ctx);
/* ... nodeptr klass nodes */
duk_push_object(ctx);
/* ... nodeptr klass nodes obj */
duk_push_object(ctx);
/* ... nodeptr klass nodes obj handlers */
duk_put_prop_string(ctx, -2, HANDLER_LISTENER_MAGIC);
/* ... nodeptr klass nodes obj */
duk_push_object(ctx);
/* ... nodeptr klass nodes obj handlers */
duk_put_prop_string(ctx, -2, HANDLER_MAGIC);
/* ... nodeptr klass nodes obj */
duk_dup(ctx, -4);
/* ... nodeptr klass nodes obj nodeptr */
duk_dup(ctx, -4);
/* ... nodeptr klass nodes obj nodeptr klass */
duk_push_int(ctx, 1);
/* ... nodeptr klass nodes obj nodeptr klass 1 */
if (duk_safe_call(ctx, dukky_populate_object, NULL, 4, 1)
!= DUK_EXEC_SUCCESS) {
duk_set_top(ctx, top_at_fail);
NSLOG(dukky, ERROR, "Failed to populate object prototype");
return false;
}
/* ... nodeptr klass nodes node */
duk_dup(ctx, -4);
/* ... nodeptr klass nodes node nodeptr */
duk_dup(ctx, -2);
/* ... nodeptr klass nodes node nodeptr node */
duk_put_prop(ctx, -4);
/* ... nodeptr klass nodes node */
}
/* ... nodeptr klass nodes node */
duk_insert(ctx, -4);
/* ... node nodeptr klass nodes */
duk_pop_3(ctx);
/* ... node */
{
duk_dup(ctx, -1);
const char * what = duk_safe_to_string(ctx, -1);
NSLOG(dukky, DEEPDEBUG, "Created: %s", what);
duk_pop(ctx);
}
return true;
}
#define SET_HTML_CLASS(CLASS) \
*html_class = PROTO_NAME(HTML##CLASS##ELEMENT); \
*html_class_len = \
SLEN(PROTO_NAME(HTML)) + \
SLEN(#CLASS) + \
SLEN("ELEMENT");
static void dukky_html_element_class_from_tag_type(dom_html_element_type type,
const char **html_class, size_t *html_class_len)
{
switch(type) {
case DOM_HTML_ELEMENT_TYPE_HTML:
SET_HTML_CLASS(HTML)
break;
case DOM_HTML_ELEMENT_TYPE_HEAD:
SET_HTML_CLASS(HEAD)
break;
case DOM_HTML_ELEMENT_TYPE_META:
SET_HTML_CLASS(META)
break;
case DOM_HTML_ELEMENT_TYPE_BASE:
SET_HTML_CLASS(BASE)
break;
case DOM_HTML_ELEMENT_TYPE_TITLE:
SET_HTML_CLASS(TITLE)
break;
case DOM_HTML_ELEMENT_TYPE_BODY:
SET_HTML_CLASS(BODY)
break;
case DOM_HTML_ELEMENT_TYPE_DIV:
SET_HTML_CLASS(DIV)
break;
case DOM_HTML_ELEMENT_TYPE_FORM:
SET_HTML_CLASS(FORM)
break;
case DOM_HTML_ELEMENT_TYPE_LINK:
SET_HTML_CLASS(LINK)
break;
case DOM_HTML_ELEMENT_TYPE_BUTTON:
SET_HTML_CLASS(BUTTOM)
break;
case DOM_HTML_ELEMENT_TYPE_INPUT:
SET_HTML_CLASS(INPUT)
break;
case DOM_HTML_ELEMENT_TYPE_TEXTAREA:
SET_HTML_CLASS(TEXTAREA)
break;
case DOM_HTML_ELEMENT_TYPE_OPTGROUP:
SET_HTML_CLASS(OPTGROUP)
break;
case DOM_HTML_ELEMENT_TYPE_OPTION:
SET_HTML_CLASS(OPTION)
break;
case DOM_HTML_ELEMENT_TYPE_SELECT:
SET_HTML_CLASS(SELECT)
break;
case DOM_HTML_ELEMENT_TYPE_HR:
SET_HTML_CLASS(HR)
break;
case DOM_HTML_ELEMENT_TYPE_DL:
SET_HTML_CLASS(DLIST)
break;
case DOM_HTML_ELEMENT_TYPE_DIR:
SET_HTML_CLASS(DIRECTORY)
break;
case DOM_HTML_ELEMENT_TYPE_MENU:
SET_HTML_CLASS(MENU)
break;
case DOM_HTML_ELEMENT_TYPE_FIELDSET:
SET_HTML_CLASS(FIELDSET)
break;
case DOM_HTML_ELEMENT_TYPE_LEGEND:
SET_HTML_CLASS(LEGEND)
break;
case DOM_HTML_ELEMENT_TYPE_P:
SET_HTML_CLASS(PARAGRAPH)
break;
case DOM_HTML_ELEMENT_TYPE_H1:
case DOM_HTML_ELEMENT_TYPE_H2:
case DOM_HTML_ELEMENT_TYPE_H3:
case DOM_HTML_ELEMENT_TYPE_H4:
case DOM_HTML_ELEMENT_TYPE_H5:
case DOM_HTML_ELEMENT_TYPE_H6:
SET_HTML_CLASS(HEADING)
break;
case DOM_HTML_ELEMENT_TYPE_BLOCKQUOTE:
case DOM_HTML_ELEMENT_TYPE_Q:
SET_HTML_CLASS(QUOTE)
break;
case DOM_HTML_ELEMENT_TYPE_PRE:
SET_HTML_CLASS(PRE)
break;
case DOM_HTML_ELEMENT_TYPE_BR:
SET_HTML_CLASS(BR)
break;
case DOM_HTML_ELEMENT_TYPE_LABEL:
SET_HTML_CLASS(LABEL)
break;
case DOM_HTML_ELEMENT_TYPE_UL:
SET_HTML_CLASS(ULIST)
break;
case DOM_HTML_ELEMENT_TYPE_OL:
SET_HTML_CLASS(OLIST)
break;
case DOM_HTML_ELEMENT_TYPE_LI:
SET_HTML_CLASS(LI)
break;
case DOM_HTML_ELEMENT_TYPE_FONT:
SET_HTML_CLASS(FONT)
break;
case DOM_HTML_ELEMENT_TYPE_DEL:
case DOM_HTML_ELEMENT_TYPE_INS:
SET_HTML_CLASS(MOD)
break;
case DOM_HTML_ELEMENT_TYPE_A:
SET_HTML_CLASS(ANCHOR)
break;
case DOM_HTML_ELEMENT_TYPE_BASEFONT:
SET_HTML_CLASS(BASEFONT)
break;
case DOM_HTML_ELEMENT_TYPE_IMG:
SET_HTML_CLASS(IMAGE)
break;
case DOM_HTML_ELEMENT_TYPE_OBJECT:
SET_HTML_CLASS(OBJECT)
break;
case DOM_HTML_ELEMENT_TYPE_PARAM:
SET_HTML_CLASS(PARAM)
break;
case DOM_HTML_ELEMENT_TYPE_APPLET:
SET_HTML_CLASS(APPLET)
break;
case DOM_HTML_ELEMENT_TYPE_MAP:
SET_HTML_CLASS(MAP)
break;
case DOM_HTML_ELEMENT_TYPE_AREA:
SET_HTML_CLASS(AREA)
break;
case DOM_HTML_ELEMENT_TYPE_SCRIPT:
SET_HTML_CLASS(SCRIPT)
break;
case DOM_HTML_ELEMENT_TYPE_CAPTION:
SET_HTML_CLASS(TABLECAPTION)
break;
case DOM_HTML_ELEMENT_TYPE_TD:
case DOM_HTML_ELEMENT_TYPE_TH:
SET_HTML_CLASS(TABLECELL)
break;
case DOM_HTML_ELEMENT_TYPE_COL:
case DOM_HTML_ELEMENT_TYPE_COLGROUP:
SET_HTML_CLASS(TABLECOL)
break;
case DOM_HTML_ELEMENT_TYPE_THEAD:
case DOM_HTML_ELEMENT_TYPE_TBODY:
case DOM_HTML_ELEMENT_TYPE_TFOOT:
SET_HTML_CLASS(TABLESECTION)
break;
case DOM_HTML_ELEMENT_TYPE_TABLE:
SET_HTML_CLASS(TABLE)
break;
case DOM_HTML_ELEMENT_TYPE_TR:
SET_HTML_CLASS(TABLEROW)
break;
case DOM_HTML_ELEMENT_TYPE_STYLE:
SET_HTML_CLASS(STYLE)
break;
case DOM_HTML_ELEMENT_TYPE_FRAMESET:
SET_HTML_CLASS(FRAMESET)
break;
case DOM_HTML_ELEMENT_TYPE_FRAME:
SET_HTML_CLASS(FRAME)
break;
case DOM_HTML_ELEMENT_TYPE_IFRAME:
SET_HTML_CLASS(IFRAME)
break;
case DOM_HTML_ELEMENT_TYPE_ISINDEX:
SET_HTML_CLASS(ISINDEX)
break;
case DOM_HTML_ELEMENT_TYPE__COUNT:
assert(type != DOM_HTML_ELEMENT_TYPE__COUNT);
/* fallthrough */
case DOM_HTML_ELEMENT_TYPE__UNKNOWN:
SET_HTML_CLASS(UNKNOWN)
break;
default:
/* Known HTML element without a specialisation */
*html_class = PROTO_NAME(HTMLELEMENT);
*html_class_len =
SLEN(PROTO_NAME(HTML)) +
SLEN("ELEMENT");
break;
}
return;
}
#undef SET_HTML_CLASS
static void
dukky_push_node_klass(duk_context *ctx, struct dom_node *node)
{
dom_node_type nodetype;
dom_exception err;
err = dom_node_get_node_type(node, &nodetype);
if (err != DOM_NO_ERR) {
/* Oh bum, just node then */
duk_push_string(ctx, PROTO_NAME(NODE));
return;
}
switch(nodetype) {
case DOM_ELEMENT_NODE: {
dom_string *namespace;
dom_html_element_type type;
const char *html_class;
size_t html_class_len;
err = dom_node_get_namespace(node, &namespace);
if (err != DOM_NO_ERR) {
/* Feck it, element */
NSLOG(dukky, ERROR,
"dom_node_get_namespace() failed");
duk_push_string(ctx, PROTO_NAME(ELEMENT));
break;
}
if (namespace == NULL) {
/* No namespace, -> element */
NSLOG(dukky, DEBUG, "no namespace");
duk_push_string(ctx, PROTO_NAME(ELEMENT));
break;
}
if (dom_string_isequal(namespace, corestring_dom_html_namespace) == false) {
/* definitely not an HTML element of some kind */
duk_push_string(ctx, PROTO_NAME(ELEMENT));
dom_string_unref(namespace);
break;
}
dom_string_unref(namespace);
err = dom_html_element_get_tag_type(node, &type);
if (err != DOM_NO_ERR) {
type = DOM_HTML_ELEMENT_TYPE__UNKNOWN;
}
dukky_html_element_class_from_tag_type(type,
&html_class, &html_class_len);
duk_push_lstring(ctx, html_class, html_class_len);
break;
}
case DOM_TEXT_NODE:
duk_push_string(ctx, PROTO_NAME(TEXT));
break;
case DOM_COMMENT_NODE:
duk_push_string(ctx, PROTO_NAME(COMMENT));
break;
case DOM_DOCUMENT_NODE:
duk_push_string(ctx, PROTO_NAME(DOCUMENT));
break;
case DOM_ATTRIBUTE_NODE:
case DOM_PROCESSING_INSTRUCTION_NODE:
case DOM_DOCUMENT_TYPE_NODE:
case DOM_DOCUMENT_FRAGMENT_NODE:
case DOM_NOTATION_NODE:
case DOM_ENTITY_REFERENCE_NODE:
case DOM_ENTITY_NODE:
case DOM_CDATA_SECTION_NODE:
default:
/* Oh bum, just node then */
duk_push_string(ctx, PROTO_NAME(NODE));
}
}
duk_bool_t
dukky_push_node(duk_context *ctx, struct dom_node *node)
{
NSLOG(dukky, DEEPDEBUG, "Pushing node %p", node);
/* First check if we can find the node */
/* ... */
duk_get_global_string(ctx, NODE_MAGIC);
/* ... nodes */
duk_push_pointer(ctx, node);
/* ... nodes nodeptr */
duk_get_prop(ctx, -2);
/* ... nodes node/undefined */
if (!duk_is_undefined(ctx, -1)) {
/* ... nodes node */
duk_insert(ctx, -2);
/* ... node nodes */
duk_pop(ctx);
/* ... node */
{
duk_dup(ctx, -1);
const char * what = duk_safe_to_string(ctx, -1);
NSLOG(dukky, DEEPDEBUG, "Found it memoised: %s", what);
duk_pop(ctx);
}
return true;
}
/* ... nodes undefined */
duk_pop_2(ctx);
/* ... */
/* We couldn't, so now we determine the node type and then
* we ask for it to be created
*/
duk_push_pointer(ctx, node);
/* ... nodeptr */
dukky_push_node_klass(ctx, node);
/* ... nodeptr klass */
return dukky_push_node_stacked(ctx);
}
static duk_ret_t
dukky_bad_constructor(duk_context *ctx)
{
return duk_error(ctx, DUK_ERR_ERROR, "Bad constructor");
}
void
dukky_inject_not_ctr(duk_context *ctx, int idx, const char *name)
{
/* ... p[idx] ... proto */
duk_push_c_function(ctx, dukky_bad_constructor, 0);
/* ... p[idx] ... proto cons */
duk_insert(ctx, -2);
/* ... p[idx] ... cons proto */
duk_put_prop_string(ctx, -2, "prototype");
/* ... p[idx] ... cons[proto] */
duk_put_prop_string(ctx, idx, name);
/* ... p ... */
return;
}
/* Duktape heap utility functions */
/* We need to override the defaults because not all platforms are fully ANSI
* compatible. E.g. RISC OS gets upset if we malloc or realloc a zero byte
* block, as do debugging tools such as Electric Fence by Bruce Perens.
*/
static void *dukky_alloc_function(void *udata, duk_size_t size)
{
if (size == 0)
return NULL;
return malloc(size);
}
static void *dukky_realloc_function(void *udata, void *ptr, duk_size_t size)
{
if (ptr == NULL && size == 0)
return NULL;
if (size == 0) {
free(ptr);
return NULL;
}
return realloc(ptr, size);
}
static void dukky_free_function(void *udata, void *ptr)
{
if (ptr != NULL)
free(ptr);
}
/**************************************** js.h ******************************/
struct jscontext {
duk_context *ctx;
duk_context *thread;
uint64_t exec_start_time;
};
#define CTX (ctx->thread)
void js_initialise(void)
{
/** TODO: Forces JS on for our testing, needs changing before a release
* lest we incur the wrath of others.
*/
/* Disabled force-on for forthcoming release */
/* nsoption_set_bool(enable_javascript, true);
*/
javascript_init();
}
void js_finalise(void)
{
/* NADA for now */
}
#define DUKKY_NEW_PROTOTYPE(klass, uklass, klass_name) \
dukky_create_prototype(ctx, dukky_##klass##___proto, PROTO_NAME(uklass), klass_name)
nserror js_newcontext(int timeout, jscallback *cb, void *cbctx,
jscontext **jsctx)
{
duk_context *ctx;
jscontext *ret = calloc(1, sizeof(*ret));
*jsctx = NULL;
NSLOG(dukky, DEBUG, "Creating new duktape javascript context");
if (ret == NULL) return NSERROR_NOMEM;
ctx = ret->ctx = duk_create_heap(
dukky_alloc_function,
dukky_realloc_function,
dukky_free_function,
ret,
NULL);
if (ret->ctx == NULL) { free(ret); return NSERROR_NOMEM; }
/* Create the prototype stuffs */
duk_push_global_object(ctx);
duk_push_boolean(ctx, true);
duk_put_prop_string(ctx, -2, "protos");
duk_put_global_string(ctx, PROTO_MAGIC);
/* Create prototypes here */
dukky_create_prototypes(ctx);
*jsctx = ret;
return NSERROR_OK;
}
void js_destroycontext(jscontext *ctx)
{
NSLOG(dukky, DEBUG, "Destroying duktape javascript context");
duk_destroy_heap(ctx->ctx);
free(ctx);
}
jsobject *js_newcompartment(jscontext *ctx, void *win_priv, void *doc_priv)
{
assert(ctx != NULL);
/* Pop any active thread off */
NSLOG(dukky, DEBUG,
"New javascript/duktape compartment, win_priv=%p, doc_priv=%p", win_priv,
doc_priv);
duk_set_top(ctx->ctx, 0);
duk_push_thread(ctx->ctx);
ctx->thread = duk_require_context(ctx->ctx, -1);
duk_push_int(CTX, 0);
duk_push_int(CTX, 1);
duk_push_int(CTX, 2);
/* Manufacture a Window object */
/* win_priv is a browser_window, doc_priv is an html content struct */
duk_push_pointer(CTX, win_priv);
duk_push_pointer(CTX, doc_priv);
dukky_create_object(CTX, PROTO_NAME(WINDOW), 2);
duk_push_global_object(CTX);
duk_put_prop_string(CTX, -2, PROTO_MAGIC);
duk_set_global_object(CTX);
/* Now we need to prepare our node mapping table */
duk_push_object(CTX);
duk_push_pointer(CTX, NULL);
duk_push_null(CTX);
duk_put_prop(CTX, -3);
duk_put_global_string(CTX, NODE_MAGIC);
/* And now the event mapping table */
duk_push_object(CTX);
duk_put_global_string(CTX, EVENT_MAGIC);
return (jsobject *)ctx;
}
duk_bool_t dukky_check_timeout(void *udata)
{
#define JS_EXEC_TIMEOUT_MS 10000 /* 10 seconds */
jscontext *ctx = (jscontext *) udata;
uint64_t now;
(void) nsu_getmonotonic_ms(&now);
/* This function may be called during duk heap construction,
* so only test for execution timeout if we've recorded a
* start time.
*/
return ctx->exec_start_time != 0 &&
now > (ctx->exec_start_time + JS_EXEC_TIMEOUT_MS);
}
static duk_ret_t dukky_safe_get(duk_context *ctx, void *udata)
{
duk_get_prop_string(ctx, 0, udata);
return 1;
}
static void dukky_dump_error(duk_context *ctx)
{
/* stack is ..., errobj */
duk_idx_t stacktop = duk_get_top(ctx);
if (!duk_is_error(ctx, stacktop - 1)) {
NSLOG(dukky, INFO, "Uncaught non-Error derived error in JS: %s", duk_safe_to_string(ctx, stacktop - 1));
} else {
#define GETTER(what) \
if (duk_has_prop_string(ctx, stacktop - 1, what)) { \
NSLOG(dukky, DEEPDEBUG, "Fetching " what); \
duk_dup(ctx, stacktop - 1); \
if (duk_safe_call(ctx, dukky_safe_get, (void *)what, 1, 1) != DUK_EXEC_SUCCESS) { \
NSLOG(dukky, DEBUG, "Error fetching " what ": %s", duk_safe_to_string(ctx, -1)); \
} else { \
NSLOG(dukky, DEEPDEBUG, "Success fetching " what); \
} \
} else { \
NSLOG(dukky, DEBUG, "Faking " what); \
duk_push_string(ctx, "?" what "?"); \
}
GETTER("name");
GETTER("message");
GETTER("fileName");
GETTER("lineNumber");
GETTER("stack");
NSLOG(dukky, DEBUG, "Uncaught error in JS: %s: %s",
duk_safe_to_string(ctx, -5), duk_safe_to_string(ctx, -4));
NSLOG(dukky, DEBUG, " was at: %s line %s",
duk_safe_to_string(ctx, -3), duk_safe_to_string(ctx, -2));
NSLOG(dukky, DEBUG, " Stack trace: %s",
duk_safe_to_string(ctx, -1));
#undef GETTER
}
duk_set_top(ctx, stacktop);
}
duk_int_t dukky_pcall(duk_context *ctx, duk_size_t argc, bool reset_timeout)
{
if (reset_timeout) {
duk_memory_functions funcs;
jscontext *jsctx;
duk_get_memory_functions(ctx, &funcs);
jsctx = funcs.udata;
(void) nsu_getmonotonic_ms(&jsctx->exec_start_time);
}
duk_int_t ret = duk_pcall(ctx, argc);
if (ret) {
/* Something went wrong calling this... */
dukky_dump_error(ctx);
}
return ret;
}
bool js_exec(jscontext *ctx, const char *txt, size_t txtlen)
{
assert(ctx);
if (txt == NULL || txtlen == 0) return false;
duk_set_top(CTX, 0);
NSLOG(dukky, DEEPDEBUG, "%zd bytes: %s", txtlen, txt);
(void) nsu_getmonotonic_ms(&ctx->exec_start_time);
duk_push_string(CTX, "?unknown source?");
if (duk_pcompile_lstring_filename(CTX, DUK_COMPILE_EVAL, txt, txtlen) != 0) {
NSLOG(dukky, INFO, "Failed to compile JavaScript input");
goto handle_error;
}
if (duk_pcall(CTX, 0/*nargs*/) == DUK_EXEC_ERROR) {
NSLOG(dukky, INFO, "Failed to execute JavaScript");
goto handle_error;
}
if (duk_get_top(CTX) == 0) duk_push_boolean(CTX, false);
NSLOG(dukky, INFO, "Returning %s",
duk_get_boolean(CTX, 0) ? "true" : "false");
return duk_get_boolean(CTX, 0);
handle_error:
dukky_dump_error(CTX);
return false;
}
/*** New style event handling ***/
void dukky_push_event(duk_context *ctx, dom_event *evt)
{
/* ... */
duk_get_global_string(ctx, EVENT_MAGIC);
/* ... events */
duk_push_pointer(ctx, evt);
/* ... events eventptr */
duk_get_prop(ctx, -2);
/* ... events event? */
if (duk_is_undefined(ctx, -1)) {
/* ... events undefined */
duk_pop(ctx);
/* ... events */
duk_push_pointer(ctx, evt);
if (dukky_create_object(ctx, PROTO_NAME(EVENT), 1) != DUK_EXEC_SUCCESS) {
/* ... events err */
duk_pop(ctx);
/* ... events */
duk_push_object(ctx);
/* ... events eobj[meh] */
}
/* ... events eobj */
duk_push_pointer(ctx, evt);
/* ... events eobj eventptr */
duk_dup(ctx, -2);
/* ... events eobj eventptr eobj */
duk_put_prop(ctx, -4);
/* ... events eobj */
}
/* ... events event */
duk_replace(ctx, -2);
/* ... event */
}
static void dukky_push_handler_code_(duk_context *ctx, dom_string *name,
dom_event_target *et)
{
dom_string *onname, *val;
dom_element *ele = (dom_element *)et;
dom_exception exc;
dom_node_type ntype;
/* If et is NULL, then we're actually dealing with the Window object
* which has no default handlers and no way to assign handlers
* which aren't directly stored in the HANDLER_MAGIC
*/
if (et == NULL) {
duk_push_lstring(ctx, "", 0);
return;
}
/* The rest of this assumes et is a proper event target and expands
* out from there based on the assumption that all valid event targets
* are nodes.
*/
exc = dom_node_get_node_type(et, &ntype);
if (exc != DOM_NO_ERR) {
duk_push_lstring(ctx, "", 0);
return;
}
if (ntype != DOM_ELEMENT_NODE) {
duk_push_lstring(ctx, "", 0);
return;
}
exc = dom_string_concat(corestring_dom_on, name, &onname);
if (exc != DOM_NO_ERR) {
duk_push_lstring(ctx, "", 0);
return;
}
exc = dom_element_get_attribute(ele, onname, &val);
if ((exc != DOM_NO_ERR) || (val == NULL)) {
dom_string_unref(onname);
duk_push_lstring(ctx, "", 0);
return;
}
dom_string_unref(onname);
duk_push_lstring(ctx, dom_string_data(val), dom_string_length(val));
dom_string_unref(val);
}
bool dukky_get_current_value_of_event_handler(duk_context *ctx,
dom_string *name,
dom_event_target *et)
{
/* Must be entered as:
* ... node(et)
*/
duk_get_prop_string(ctx, -1, HANDLER_MAGIC);
/* ... node handlers */
duk_push_lstring(ctx, dom_string_data(name), dom_string_length(name));
/* ... node handlers name */
duk_get_prop(ctx, -2);
/* ... node handlers handler? */
if (duk_is_undefined(ctx, -1)) {
/* ... node handlers undefined */
duk_pop_2(ctx);
/* ... node */
dukky_push_handler_code_(ctx, name, et);
/* ... node handlercode? */
/* TODO: If this is null, clean up and propagate */
/* ... node handlercode */
/** @todo This is entirely wrong, but it's hard to get right */
duk_push_string(ctx, "function (event) {");
/* ... node handlercode prefix */
duk_insert(ctx, -2);
/* ... node prefix handlercode */
duk_push_string(ctx, "}");
/* ... node prefix handlercode suffix */
duk_concat(ctx, 3);
/* ... node fullhandlersrc */
duk_push_string(ctx, "internal raw uncompiled handler");
/* ... node fullhandlersrc filename */
if (duk_pcompile(ctx, DUK_COMPILE_FUNCTION) != 0) {
/* ... node err */
NSLOG(dukky, DEBUG,
"Unable to proceed with handler, could not compile");
duk_pop_2(ctx);
return false;
}
/* ... node handler */
duk_insert(ctx, -2);
/* ... handler node */
} else {
/* ... node handlers handler */
duk_insert(ctx, -3);
/* ... handler node handlers */
duk_pop(ctx);
/* ... handler node */
}
/* ... handler node */
return true;
}
static void dukky_generic_event_handler(dom_event *evt, void *pw)
{
duk_memory_functions funcs;
duk_context *ctx = (duk_context *)pw;
jscontext *jsctx;
dom_string *name;
dom_exception exc;
dom_event_target *targ;
dom_event_flow_phase phase;
duk_uarridx_t idx;
event_listener_flags flags;
/* Retrieve the JS context from the Duktape context */
duk_get_memory_functions(ctx, &funcs);
jsctx = funcs.udata;
NSLOG(dukky, DEBUG, "Handling an event in duktape interface...");
exc = dom_event_get_type(evt, &name);
if (exc != DOM_NO_ERR) {
NSLOG(dukky, DEBUG, "Unable to find the event name");
return;
}
NSLOG(dukky, DEBUG, "Event's name is %*s", dom_string_length(name),
dom_string_data(name));
exc = dom_event_get_event_phase(evt, &phase);
if (exc != DOM_NO_ERR) {
NSLOG(dukky, WARNING, "Unable to get event phase");
return;
}
NSLOG(dukky, DEBUG, "Event phase is: %s (%d)",
phase == DOM_CAPTURING_PHASE ? "capturing" : phase == DOM_AT_TARGET ? "at-target" : phase == DOM_BUBBLING_PHASE ? "bubbling" : "unknown",
(int)phase);
exc = dom_event_get_current_target(evt, &targ);
if (exc != DOM_NO_ERR) {
dom_string_unref(name);
NSLOG(dukky, DEBUG, "Unable to find the event target");
return;
}
/* If we're capturing right now, we skip the 'event handler'
* and go straight to the extras
*/
if (phase == DOM_CAPTURING_PHASE)
goto handle_extras;
/* ... */
if (dukky_push_node(ctx, (dom_node *)targ) == false) {
dom_string_unref(name);
dom_node_unref(targ);
NSLOG(dukky, DEBUG,
"Unable to push JS node representation?!");
return;
}
/* ... node */
if (dukky_get_current_value_of_event_handler(
ctx, name, (dom_event_target *)targ) == false) {
/* ... */
goto handle_extras;
}
/* ... handler node */
dukky_push_event(ctx, evt);
/* ... handler node event */
(void) nsu_getmonotonic_ms(&jsctx->exec_start_time);
if (duk_pcall_method(ctx, 1) != 0) {
/* Failed to run the method */
/* ... err */
NSLOG(dukky, DEBUG,
"OH NOES! An error running a callback. Meh.");
exc = dom_event_stop_immediate_propagation(evt);
if (exc != DOM_NO_ERR)
NSLOG(dukky, DEBUG,
"WORSE! could not stop propagation");
duk_get_prop_string(ctx, -1, "name");
duk_get_prop_string(ctx, -2, "message");
duk_get_prop_string(ctx, -3, "fileName");
duk_get_prop_string(ctx, -4, "lineNumber");
duk_get_prop_string(ctx, -5, "stack");
/* ... err name message fileName lineNumber stack */
NSLOG(dukky, DEBUG, "Uncaught error in JS: %s: %s",
duk_safe_to_string(ctx, -5),
duk_safe_to_string(ctx, -4));
NSLOG(dukky, INFO, " was at: %s line %s",
duk_safe_to_string(ctx, -3),
duk_safe_to_string(ctx, -2));
NSLOG(dukky, INFO, " Stack trace: %s",
duk_safe_to_string(ctx, -1));
duk_pop_n(ctx, 6);
/* ... */
goto handle_extras;
}
/* ... result */
if (duk_is_boolean(ctx, -1) &&
duk_to_boolean(ctx, -1) == 0) {
dom_event_prevent_default(evt);
}
duk_pop(ctx);
handle_extras:
/* ... */
duk_push_lstring(ctx, dom_string_data(name), dom_string_length(name));
dukky_push_node(ctx, (dom_node *)targ);
/* ... type node */
if (dukky_event_target_push_listeners(ctx, true)) {
/* Nothing to do */
duk_pop(ctx);
goto out;
}
/* ... sublisteners */
duk_push_array(ctx);
/* ... sublisteners copy */
idx = 0;
while (duk_get_prop_index(ctx, -2, idx)) {
/* ... sublisteners copy handler */
duk_get_prop_index(ctx, -1, 1);
/* ... sublisteners copy handler flags */
if ((event_listener_flags)duk_to_int(ctx, -1) & ELF_ONCE) {
duk_dup(ctx, -4);
/* ... subl copy handler flags subl */
dukky_shuffle_array(ctx, idx);
duk_pop(ctx);
/* ... subl copy handler flags */
}
duk_pop(ctx);
/* ... sublisteners copy handler */
duk_put_prop_index(ctx, -2, idx);
/* ... sublisteners copy */
idx++;
}
/* ... sublisteners copy undefined */
duk_pop(ctx);
/* ... sublisteners copy */
duk_insert(ctx, -2);
/* ... copy sublisteners */
duk_pop(ctx);
/* ... copy */
idx = 0;
while (duk_get_prop_index(ctx, -1, idx++)) {
/* ... copy handler */
if (duk_get_prop_index(ctx, -1, 2)) {
/* ... copy handler meh */
duk_pop_2(ctx);
continue;
}
duk_pop(ctx);
duk_get_prop_index(ctx, -1, 0);
duk_get_prop_index(ctx, -2, 1);
/* ... copy handler callback flags */
flags = (event_listener_flags)duk_get_int(ctx, -1);
duk_pop(ctx);
/* ... copy handler callback */
if (((phase == DOM_CAPTURING_PHASE) && !(flags & ELF_CAPTURE)) ||
((phase != DOM_CAPTURING_PHASE) && (flags & ELF_CAPTURE))) {
duk_pop_2(ctx);
/* ... copy */
continue;
}
/* ... copy handler callback */
dukky_push_node(ctx, (dom_node *)targ);
/* ... copy handler callback node */
dukky_push_event(ctx, evt);
/* ... copy handler callback node event */
(void) nsu_getmonotonic_ms(&jsctx->exec_start_time);
if (duk_pcall_method(ctx, 1) != 0) {
/* Failed to run the method */
/* ... copy handler err */
NSLOG(dukky, DEBUG,
"OH NOES! An error running a callback. Meh.");
exc = dom_event_stop_immediate_propagation(evt);
if (exc != DOM_NO_ERR)
NSLOG(dukky, DEBUG,
"WORSE! could not stop propagation");
duk_get_prop_string(ctx, -1, "name");
duk_get_prop_string(ctx, -2, "message");
duk_get_prop_string(ctx, -3, "fileName");
duk_get_prop_string(ctx, -4, "lineNumber");
duk_get_prop_string(ctx, -5, "stack");
/* ... err name message fileName lineNumber stack */
NSLOG(dukky, DEBUG, "Uncaught error in JS: %s: %s",
duk_safe_to_string(ctx, -5),
duk_safe_to_string(ctx, -4));
NSLOG(dukky, DEBUG,
" was at: %s line %s",
duk_safe_to_string(ctx, -3),
duk_safe_to_string(ctx, -2));
NSLOG(dukky, DEBUG, " Stack trace: %s",
duk_safe_to_string(ctx, -1));
duk_pop_n(ctx, 7);
/* ... copy */
continue;
}
/* ... copy handler result */
if (duk_is_boolean(ctx, -1) &&
duk_to_boolean(ctx, -1) == 0) {
dom_event_prevent_default(evt);
}
duk_pop_2(ctx);
/* ... copy */
}
duk_pop_2(ctx);
out:
/* ... */
dom_node_unref(targ);
dom_string_unref(name);
}
void dukky_register_event_listener_for(duk_context *ctx,
struct dom_element *ele,
dom_string *name,
bool capture)
{
dom_event_listener *listen = NULL;
dom_exception exc;
/* ... */
if (ele == NULL) {
/* A null element is the Window object */
duk_push_global_object(ctx);
} else {
/* Non null elements must be pushed as a node object */
if (dukky_push_node(ctx, (struct dom_node *)ele) == false)
return;
}
/* ... node */
duk_get_prop_string(ctx, -1, HANDLER_LISTENER_MAGIC);
/* ... node handlers */
duk_push_lstring(ctx, dom_string_data(name), dom_string_length(name));
/* ... node handlers name */
if (duk_has_prop(ctx, -2)) {
/* ... node handlers */
duk_pop_2(ctx);
/* ... */
return;
}
/* ... node handlers */
duk_push_lstring(ctx, dom_string_data(name), dom_string_length(name));
/* ... node handlers name */
duk_push_boolean(ctx, true);
/* ... node handlers name true */
duk_put_prop(ctx, -3);
/* ... node handlers */
duk_pop_2(ctx);
/* ... */
if (ele == NULL) {
/* Nothing more to do, Window doesn't register in the
* normal event listener flow
*/
return;
}
/* Otherwise add an event listener to the element */
exc = dom_event_listener_create(dukky_generic_event_handler, ctx,
&listen);
if (exc != DOM_NO_ERR) return;
exc = dom_event_target_add_event_listener(
ele, name, listen, capture);
if (exc != DOM_NO_ERR) {
NSLOG(dukky, DEBUG,
"Unable to register listener for %p.%*s", ele,
dom_string_length(name), dom_string_data(name));
} else {
NSLOG(dukky, DEBUG, "have registered listener for %p.%*s",
ele, dom_string_length(name), dom_string_data(name));
}
dom_event_listener_unref(listen);
}
/* The sub-listeners are a list of {callback,flags} tuples */
/* We return true if we created a new sublistener table */
/* If we're told to not create, but we want to, we still return true */
bool dukky_event_target_push_listeners(duk_context *ctx, bool dont_create)
{
bool ret = false;
/* ... type this */
duk_get_prop_string(ctx, -1, EVENT_LISTENER_JS_MAGIC);
if (duk_is_undefined(ctx, -1)) {
/* ... type this null */
duk_pop(ctx);
duk_push_object(ctx);
duk_dup(ctx, -1);
/* ... type this listeners listeners */
duk_put_prop_string(ctx, -3, EVENT_LISTENER_JS_MAGIC);
/* ... type this listeners */
}
/* ... type this listeners */
duk_insert(ctx, -3);
/* ... listeners type this */
duk_pop(ctx);
/* ... listeners type */
duk_dup(ctx, -1);
/* ... listeners type type */
duk_get_prop(ctx, -3);
/* ... listeners type ??? */
if (duk_is_undefined(ctx, -1)) {
/* ... listeners type ??? */
if (dont_create == true) {
duk_pop_3(ctx);
duk_push_undefined(ctx);
return true;
}
duk_pop(ctx);
duk_push_array(ctx);
duk_dup(ctx, -2);
duk_dup(ctx, -2);
/* ... listeners type sublisteners type sublisteners */
duk_put_prop(ctx, -5);
/* ... listeners type sublisteners */
ret = true;
}
duk_insert(ctx, -3);
/* ... sublisteners listeners type */
duk_pop_2(ctx);
/* ... sublisteners */
return ret;
}
/* Shuffle a duktape array "down" one. This involves iterating from
* the index provided, shuffling elements down, until we reach an
* undefined
*/
void dukky_shuffle_array(duk_context *ctx, duk_uarridx_t idx)
{
/* ... somearr */
while (duk_get_prop_index(ctx, -1, idx + 1)) {
duk_put_prop_index(ctx, -2, idx);
idx++;
}
/* ... somearr undefined */
duk_del_prop_index(ctx, -2, idx + 1);
duk_pop(ctx);
}
void js_handle_new_element(jscontext *ctx, struct dom_element *node)
{
assert(ctx);
assert(node);
dom_namednodemap *map;
dom_exception exc;
dom_ulong idx;
dom_ulong siz;
dom_attr *attr = NULL;
dom_string *key = NULL;
dom_string *nodename;
duk_bool_t is_body = false;
exc = dom_node_get_node_name(node, &nodename);
if (exc != DOM_NO_ERR) return;
if (nodename == corestring_dom_BODY)
is_body = true;
dom_string_unref(nodename);
exc = dom_node_get_attributes(node, &map);
if (exc != DOM_NO_ERR) return;
if (map == NULL) return;
exc = dom_namednodemap_get_length(map, &siz);
if (exc != DOM_NO_ERR) goto out;
for (idx = 0; idx < siz; idx++) {
exc = dom_namednodemap_item(map, idx, &attr);
if (exc != DOM_NO_ERR) goto out;
exc = dom_attr_get_name(attr, &key);
if (exc != DOM_NO_ERR) goto out;
if (is_body && (
key == corestring_dom_onblur ||
key == corestring_dom_onerror ||
key == corestring_dom_onfocus ||
key == corestring_dom_onload ||
key == corestring_dom_onresize ||
key == corestring_dom_onscroll)) {
/* This is a forwarded event, it doesn't matter,
* we should skip registering for it and later
* we will register it for Window itself
*/
goto skip_register;
}
if (dom_string_length(key) > 2) {
/* Can be on* */
const uint8_t *data = (const uint8_t *)dom_string_data(key);
if (data[0] == 'o' && data[1] == 'n') {
dom_string *sub = NULL;
exc = dom_string_substr(
key, 2, dom_string_length(key),
&sub);
if (exc == DOM_NO_ERR) {
dukky_register_event_listener_for(
CTX, node, sub, false);
dom_string_unref(sub);
}
}
}
skip_register:
dom_string_unref(key); key = NULL;
dom_node_unref(attr); attr = NULL;
}
out:
if (key != NULL)
dom_string_unref(key);
if (attr != NULL)
dom_node_unref(attr);
dom_namednodemap_unref(map);
}
void js_event_cleanup(jscontext *ctx, struct dom_event *evt)
{
assert(ctx);
/* ... */
duk_get_global_string(CTX, EVENT_MAGIC);
/* ... EVENT_MAP */
duk_push_pointer(CTX, evt);
/* ... EVENT_MAP eventptr */
duk_del_prop(CTX, -2);
/* ... EVENT_MAP */
duk_pop(CTX);
/* ... */
}
bool js_fire_event(jscontext *ctx, const char *type, struct dom_document *doc, struct dom_node *target)
{
dom_exception exc;
dom_event *evt;
dom_event_target *body;
NSLOG(dukky, DEBUG, "Event: %s (doc=%p, target=%p)", type, doc,
target);
/** @todo Make this more generic, this only handles load and only
* targetting the window, so that we actually stand a chance of
* getting 3.4 out.
*/
if (target != NULL)
/* Swallow non-Window-targetted events quietly */
return true;
if (strcmp(type, "load") != 0)
/* Swallow non-load events quietly */
return true;
/* Okay, we're processing load, targetted at Window, do the single
* thing which gets us there, which is to find the appropriate event
* handler and call it. If we have no event handler on Window then
* we divert to the body, and if there's no event handler there
* we swallow the event silently
*/
exc = dom_event_create(&evt);
if (exc != DOM_NO_ERR) return true;
exc = dom_event_init(evt, corestring_dom_load, false, false);
if (exc != DOM_NO_ERR) {
dom_event_unref(evt);
return true;
}
/* ... */
duk_get_global_string(CTX, HANDLER_MAGIC);
/* ... handlers */
duk_push_lstring(CTX, "load", 4);
/* ... handlers "load" */
duk_get_prop(CTX, -2);
/* ... handlers handler? */
if (duk_is_undefined(CTX, -1)) {
/* No handler here, *try* and retrieve a handler from
* the body
*/
duk_pop(CTX);
/* ... handlers */
exc = dom_html_document_get_body(doc, &body);
if (exc != DOM_NO_ERR) {
dom_event_unref(evt);
return true;
}
dukky_push_node(CTX, (struct dom_node *)body);
/* ... handlers bodynode */
if (dukky_get_current_value_of_event_handler(
CTX, corestring_dom_load, body) == false) {
/* Unref the body, we don't need it any more */
dom_node_unref(body);
/* ... handlers */
duk_pop(CTX);
return true;
}
/* Unref the body, we don't need it any more */
dom_node_unref(body);
/* ... handlers handler bodynode */
duk_pop(CTX);
}
/* ... handlers handler */
duk_insert(CTX, -2);
/* ... handler handlers */
duk_pop(CTX);
/* ... handler */
duk_push_global_object(CTX);
/* ... handler Window */
dukky_push_event(CTX, evt);
/* ... handler Window event */
(void) nsu_getmonotonic_ms(&ctx->exec_start_time);
if (duk_pcall_method(CTX, 1) != 0) {
/* Failed to run the handler */
/* ... err */
NSLOG(dukky, DEBUG,
"OH NOES! An error running a handler. Meh.");
duk_get_prop_string(CTX, -1, "name");
duk_get_prop_string(CTX, -2, "message");
duk_get_prop_string(CTX, -3, "fileName");
duk_get_prop_string(CTX, -4, "lineNumber");
duk_get_prop_string(CTX, -5, "stack");
/* ... err name message fileName lineNumber stack */
NSLOG(dukky, DEBUG, "Uncaught error in JS: %s: %s",
duk_safe_to_string(CTX, -5),
duk_safe_to_string(CTX, -4));
NSLOG(dukky, DEBUG, " was at: %s line %s",
duk_safe_to_string(CTX, -3),
duk_safe_to_string(CTX, -2));
NSLOG(dukky, DEBUG, " Stack trace: %s",
duk_safe_to_string(CTX, -1));
duk_pop_n(CTX, 6);
/* ... */
js_event_cleanup(ctx, evt);
dom_event_unref(evt);
return true;
}
/* ... result */
duk_pop(CTX);
/* ... */
js_event_cleanup(ctx, evt);
dom_event_unref(evt);
return true;
}
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