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Diffstat (limited to 'javascript/dukky.c')
| -rw-r--r-- | javascript/dukky.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/javascript/dukky.c b/javascript/dukky.c new file mode 100644 index 000000000..2d744cedd --- /dev/null +++ b/javascript/dukky.c @@ -0,0 +1,204 @@ +/* + * Copyright 2012 Vincent Sanders <vince@netsurf-browser.org> + * Copyright 2015 All of us. + * + * 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 "content/content.h" +#include "utils/nsoption.h" + +#include "javascript/js.h" +#include "javascript/content.h" +#include "utils/log.h" + +#include "duktape.h" +#include "dukky.h" + +static duk_ret_t dukky_populate_object(duk_context *ctx) +{ + /* ... 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)) { + LOG("RuhRoh, couldn't find a prototype, getting htmlelement"); + duk_pop(ctx); + duk_push_string(ctx, PROTO_NAME(html_unknown_element)); + 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 */ + LOG("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; + LOG("name=%s nargs=%d", name+2, args); + /* ... args */ + duk_push_object(ctx); + /* ... args obj */ + duk_insert(ctx, -(args+1)); + /* ... obj args */ + duk_push_string(ctx, name); + /* ... obj args name */ + duk_push_int(ctx, args); + if ((ret = duk_safe_call(ctx, dukky_populate_object, args + 3, 1)) + != DUK_EXEC_SUCCESS) + return ret; + LOG("created"); + return DUK_EXEC_SUCCESS; +} + +static duk_ret_t dukky_create_prototype(duk_context *ctx, + duk_safe_call_function genproto, + const char *proto_name) +{ + duk_int_t ret; + duk_push_object(ctx); + if ((ret = duk_safe_call(ctx, genproto, 1, 1)) != DUK_EXEC_SUCCESS) { + duk_pop(ctx); + return ret; + } + /* top of stack is the ready prototype, inject it */ + duk_put_global_string(ctx, proto_name); + return 0; +} + +/**************************************** js.h ******************************/ +struct jscontext { + duk_context *ctx; + duk_context *thread; +}; + +#define CTX (ctx->thread) + +void js_initialise(void) +{ + /* NADA for now */ + nsoption_set_bool(enable_javascript, true); + javascript_init(); +} + +void js_finalise(void) +{ + /* NADA for now */ +} + +#define DUKKY_NEW_PROTOTYPE(klass) \ + dukky_create_prototype(ctx, dukky_##klass##___proto, PROTO_NAME(klass)) + +jscontext *js_newcontext(int timeout, jscallback *cb, void *cbctx) +{ + duk_context *ctx; + jscontext *ret = calloc(1, sizeof(*ret)); + LOG("Creating new JS context"); + if (ret == NULL) return NULL; + ctx = ret->ctx = duk_create_heap_default(); + if (ret->ctx == NULL) { free(ret); return NULL; } + /* Create the prototype stuffs */ + duk_push_global_object(ctx); + duk_put_global_string(ctx, PROTO_MAGIC); + /* Create prototypes here? */ + DUKKY_NEW_PROTOTYPE(event_target); + DUKKY_NEW_PROTOTYPE(window); + DUKKY_NEW_PROTOTYPE(node); + DUKKY_NEW_PROTOTYPE(document); + DUKKY_NEW_PROTOTYPE(element); + DUKKY_NEW_PROTOTYPE(html_element); + DUKKY_NEW_PROTOTYPE(html_unknown_element); + return ret; +} + +void js_destroycontext(jscontext *ctx) +{ + LOG("Destroying context"); + duk_destroy_heap(ctx->ctx); + free(ctx); +} + +jsobject *js_newcompartment(jscontext *ctx, void *win_priv, void *doc_priv) +{ + /* Pop any active thread off */ + LOG("Yay, new 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); + + return (jsobject *)ctx; +} + +static duk_ret_t eval_top_string(duk_context *ctx) +{ + duk_eval(ctx); + return 0; +} + +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); + duk_push_lstring(CTX, txt, txtlen); + LOG("Dumpy"); + DUKKY_DUMP_STACK(CTX); + if (duk_safe_call(CTX, eval_top_string, 1, 1) == DUK_EXEC_ERROR) { + LOG("JAVASCRIPT SPLOOF: %s", duk_safe_to_string(CTX, 0)); + return false; + } + if (duk_get_top(CTX) == 0) duk_push_boolean(CTX, false); + LOG("Returning %s", duk_get_boolean(CTX, 0) ? "true" : "false"); + return duk_get_boolean(CTX, 0); +} + +bool js_fire_event(jscontext *ctx, const char *type, struct dom_document *doc, struct dom_node *target) +{ + /* La La La */ + LOG("Oh arse, an event: %s", type); + return true; +} |