spidermonkey.c

一个很有名的浏览器

		/* jsform ('form') is input's parent */
		/* FIXME: That is NOT correct since the real containing element
		 * should be its parent, but gimme DOM first. --pasky */
		JSObject *jsinput = JS_NewObject(ctx, (JSClass *) &input_class, NULL, jsform);

		JS_DefineProperties(ctx, jsinput, (JSPropertySpec *) input_props);
		JS_DefineFunctions(ctx, jsinput, (JSFunctionSpec *) input_funcs);
		JS_SetPrivate(ctx, jsinput, fs);
		fs->ecmascript_obj = jsinput;
	}
	return fs->ecmascript_obj;
}


static JSObject *
get_form_control_object(JSContext *ctx, JSObject *jsform, enum form_type type, struct form_state *fs)
{
	switch (type) {
		case FC_TEXT:
		case FC_PASSWORD:
		case FC_FILE:
		case FC_CHECKBOX:
		case FC_RADIO:
		case FC_SUBMIT:
		case FC_IMAGE:
		case FC_RESET:
		case FC_BUTTON:
		case FC_HIDDEN:
			return get_input_object(ctx, jsform, fs);

		case FC_TEXTAREA:
		case FC_SELECT:
			/* TODO */
			return NULL;

		default:
			INTERNAL("Weird fc->type %d", type);
			return NULL;
	}
}



static JSBool form_elements_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp);

static const JSClass form_elements_class = {
	"elements",
	JSCLASS_HAS_PRIVATE,
	JS_PropertyStub, JS_PropertyStub,
	form_elements_get_property, JS_PropertyStub,
	JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub
};

static JSBool form_elements_item(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
static JSBool form_elements_namedItem(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);

static const JSFunctionSpec form_elements_funcs[] = {
	{ "item",		form_elements_item,		1 },
	{ "namedItem",		form_elements_namedItem,	1 },
	{ NULL }
};

/* INTs from 0 up are equivalent to item(INT), so we have to stuff length out
 * of the way. */
enum form_elements_prop { JSP_FORM_ELEMENTS_LENGTH = -1 };
static const JSPropertySpec form_elements_props[] = {
	{ "length",	JSP_FORM_ELEMENTS_LENGTH,	JSPROP_ENUMERATE | JSPROP_READONLY},
	{ NULL }
};

static JSBool
form_elements_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct form_view *form_view = JS_GetPrivate(ctx, parent_form);
	struct form *form = find_form_by_form_view(document, form_view);
	struct jsval_property prop;

	set_prop_undef(&prop);

	if (JSVAL_IS_STRING(id)) {
		form_elements_namedItem(ctx, obj, 1, &id, vp);
		return JS_TRUE;
	} else if (!JSVAL_IS_INT(id))
		return JS_TRUE;

	switch (JSVAL_TO_INT(id)) {
	case JSP_FORM_ELEMENTS_LENGTH:
	{
		struct form_control *fc;
		int counter = 0;

		foreach (fc, form->items)
			counter++;

		set_prop_int(&prop, counter);
		break;
	}
	default:
		/* Array index. */
		form_elements_item(ctx, obj, 1, &id, vp);
		return JS_TRUE;
	}

	value_to_jsval(ctx, vp, &prop);
	return JS_TRUE;
}

static JSBool
form_elements_item(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct form_view *form_view = JS_GetPrivate(ctx, parent_form);
	struct form *form = find_form_by_form_view(document, form_view);
	struct form_control *fc;
	union jsval_union v;
	int counter = -1;
	int index;
	struct jsval_property prop;

	set_prop_undef(&prop);

	if (argc != 1)
		return JS_TRUE;

	jsval_to_value(ctx, &argv[0], JSTYPE_STRING, &v);
	index = atol(v.string);

	foreach (fc, form->items) {
		counter++;
		if (counter == index) {
			JSObject *fcobj = get_form_control_object(ctx, parent_form, fc->type, find_form_state(doc_view, fc));

			if (fcobj) {
				set_prop_object(&prop, fcobj);
			} else {
				set_prop_undef(&prop);
			}

			value_to_jsval(ctx, rval, &prop);
			return JS_TRUE;
		}
	}

	return JS_TRUE;
}

static JSBool
form_elements_namedItem(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct form_view *form_view = JS_GetPrivate(ctx, parent_form);
	struct form *form = find_form_by_form_view(document, form_view);
	struct form_control *fc;
	union jsval_union v;
	struct jsval_property prop;

	set_prop_undef(&prop);

	if (argc != 1)
		return JS_TRUE;

	jsval_to_value(ctx, &argv[0], JSTYPE_STRING, &v);
	if (!v.string || !*v.string)
		return JS_TRUE;

	foreach (fc, form->items) {
		if (fc->name && !strcasecmp(v.string, fc->name)) {
			JSObject *fcobj = get_form_control_object(ctx, parent_form, fc->type, find_form_state(doc_view, fc));

			if (fcobj) {
				set_prop_object(&prop, fcobj);
			} else {
				set_prop_undef(&prop);
			}

			value_to_jsval(ctx, rval, &prop);
			return JS_TRUE;
		}
	}

	return JS_TRUE;
}



static JSBool form_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp);
static JSBool form_set_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp);

static const JSClass form_class = {
	"form",
	JSCLASS_HAS_PRIVATE,
	JS_PropertyStub, JS_PropertyStub,
	form_get_property, form_set_property,
	JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub
};

enum form_prop {
	JSP_FORM_ACTION,
	JSP_FORM_ELEMENTS,
	JSP_FORM_ENCODING,
	JSP_FORM_LENGTH,
	JSP_FORM_METHOD,
	JSP_FORM_NAME,
	JSP_FORM_TARGET
};

static const JSPropertySpec form_props[] = {
	{ "action",	JSP_FORM_ACTION,	JSPROP_ENUMERATE },
	{ "elements",	JSP_FORM_ELEMENTS,	JSPROP_ENUMERATE },
	{ "encoding",	JSP_FORM_ENCODING,	JSPROP_ENUMERATE },
	{ "length",	JSP_FORM_LENGTH,	JSPROP_ENUMERATE | JSPROP_READONLY },
	{ "method",	JSP_FORM_METHOD,	JSPROP_ENUMERATE },
	{ "name",	JSP_FORM_NAME,		JSPROP_ENUMERATE },
	{ "target",	JSP_FORM_TARGET,	JSPROP_ENUMERATE },
	{ NULL }
};

static JSBool form_reset(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
static JSBool form_submit(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);

static const JSFunctionSpec form_funcs[] = {
	{ "reset",	form_reset,	0 },
	{ "submit",	form_submit,	0 },
	{ NULL }
};

static JSBool
form_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp)
{
	/* DBG("doc %p %s\n", parent_doc, JS_GetStringBytes(JS_ValueToString(ctx, OBJECT_TO_JSVAL(parent_doc)))); */
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct form_view *fv = JS_GetPrivate(ctx, obj);
	struct form *form = find_form_by_form_view(doc_view->document, fv);
	struct jsval_property prop;

	set_prop_undef(&prop);

	assert(form);

	if (JSVAL_IS_STRING(id)) {
		struct form_control *fc;
		union jsval_union v;

		jsval_to_value(ctx, &id, JSTYPE_STRING, &v);
		foreach (fc, form->items) {
			JSObject *fcobj = NULL;

			if (!fc->name || strcasecmp(v.string, fc->name))
				continue;

			fcobj = get_form_control_object(ctx, obj, fc->type, find_form_state(doc_view, fc));
			if (fcobj) {
				set_prop_object(&prop, fcobj);
			} else {
				set_prop_undef(&prop);
			}
			goto convert;
		}
		return JS_TRUE;
	} else if (!JSVAL_IS_INT(id))
		return JS_TRUE;

	switch (JSVAL_TO_INT(id)) {
	case JSP_FORM_ACTION:
		set_prop_string(&prop, form->action);
		break;

	case JSP_FORM_ELEMENTS:
	{
		/* jsform ('form') is form_elements' parent; who knows is that's correct */
		JSObject *jsform_elems = JS_NewObject(ctx, (JSClass *) &form_elements_class, NULL, obj);

		JS_DefineProperties(ctx, jsform_elems, (JSPropertySpec *) form_elements_props);
		JS_DefineFunctions(ctx, jsform_elems, (JSFunctionSpec *) form_elements_funcs);
		set_prop_object(&prop, jsform_elems);
		/* SM will cache this property value for us so we create this
		 * just once per form. */
	}
		break;

	case JSP_FORM_ENCODING:
		switch (form->method) {
		case FORM_METHOD_GET:
		case FORM_METHOD_POST:
			set_prop_string(&prop, "application/x-www-form-urlencoded");
			break;
		case FORM_METHOD_POST_MP:
			set_prop_string(&prop, "multipart/form-data");
			break;
		case FORM_METHOD_POST_TEXT_PLAIN:
			set_prop_string(&prop, "text/plain");
			break;
		}
		break;

	case JSP_FORM_LENGTH:
	{
		struct form_control *fc;
		int counter = 0;

		foreach (fc, form->items)
			counter++;
		set_prop_int(&prop, counter);
		break;
	}

	case JSP_FORM_METHOD:
		switch (form->method) {
		case FORM_METHOD_GET:
			set_prop_string(&prop, "GET");
			break;

		case FORM_METHOD_POST:
		case FORM_METHOD_POST_MP:
		case FORM_METHOD_POST_TEXT_PLAIN:
			set_prop_string(&prop, "POST");
			break;
		}
		break;

	case JSP_FORM_NAME:
		set_prop_string(&prop, form->name);
		break;

	case JSP_FORM_TARGET:
		set_prop_string(&prop, form->target);
		break;

	default:
		INTERNAL("Invalid ID %d in form_get_property().", JSVAL_TO_INT(id));
		return JS_TRUE;
	}

convert:
	value_to_jsval(ctx, vp, &prop);
	return JS_TRUE;
}

static JSBool
form_set_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp)
{
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct form_view *fv = JS_GetPrivate(ctx, obj);
	struct form *form = find_form_by_form_view(doc_view->document, fv);
	union jsval_union v;

	assert(form);

	if (!JSVAL_IS_INT(id))
		return JS_TRUE;

	switch (JSVAL_TO_INT(id)) {
	case JSP_FORM_ACTION:
		jsval_to_value(ctx, vp, JSTYPE_STRING, &v);
		mem_free_set(&form->action, stracpy(v.string));
		break;

	case JSP_FORM_ENCODING:
		jsval_to_value(ctx, vp, JSTYPE_STRING, &v);
		if (!strcasecmp(v.string, "application/x-www-form-urlencoded")) {
			form->method = form->method == FORM_METHOD_GET ? FORM_METHOD_GET
			                                               : FORM_METHOD_POST;
		} else if (!strcasecmp(v.string, "multipart/form-data")) {
			form->method = FORM_METHOD_POST_MP;
		} else if (!strcasecmp(v.string, "text/plain")) {
			form->method = FORM_METHOD_POST_TEXT_PLAIN;
		}
		break;

	case JSP_FORM_METHOD:
		jsval_to_value(ctx, vp, JSTYPE_STRING, &v);
		if (!strcasecmp(v.string, "GET")) {
			form->method = FORM_METHOD_GET;
		} else if (!strcasecmp(v.string, "POST")) {
			form->method = FORM_METHOD_POST;
		}
		break;

	case JSP_FORM_NAME:
		jsval_to_value(ctx, vp, JSTYPE_STRING, &v);
		mem_free_set(&form->name, stracpy(v.string));
		break;

	case JSP_FORM_TARGET:
		jsval_to_value(ctx, vp, JSTYPE_STRING, &v);
		mem_free_set(&form->target, stracpy(v.string));
		break;

	default:
		INTERNAL("Invalid ID %d in form_set_property().", JSVAL_TO_INT(id));
		break;
	}

	return JS_TRUE;
}

static JSBool
form_reset(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct form_view *fv = JS_GetPrivate(ctx, obj);
	struct form *form = find_form_by_form_view(doc_view->document, fv);
	struct jsval_property prop;

	set_prop_boolean(&prop, 0);

	assert(form);

	do_reset_form(doc_view, form);
	draw_forms(doc_view->session->tab->term, doc_view);

	value_to_jsval(ctx, rval, &prop);

	return JS_TRUE;
}

static JSBool
form_submit(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct session *ses = doc_view->session;
	struct form_view *fv = JS_GetPrivate(ctx, obj);
	struct form *form = find_form_by_form_view(doc_view->document, fv);
	struct jsval_property prop;

	set_prop_boolean(&prop, 0);

	assert(form);
	submit_given_form(ses, doc_view, form);

	value_to_jsval(ctx, rval, &prop);

	return JS_TRUE;
}

static JSObject *
get_form_object(JSContext *ctx, JSObject *jsdoc, struct form_view *fv)