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|
/* property generation
*
* This file is part of nsgenbind.
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
* Copyright 2012 Vincent Sanders <vince@netsurf-browser.org>
*/
#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include "options.h"
#include "nsgenbind-ast.h"
#include "webidl-ast.h"
#include "jsapi-libdom.h"
static int webidl_property_spec_cb(struct webidl_node *node, void *ctx)
{
struct binding *binding = ctx;
struct webidl_node *ident_node;
struct webidl_node *modifier_node;
ident_node = webidl_node_find(webidl_node_getnode(node),
NULL,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_IDENT);
modifier_node = webidl_node_find(webidl_node_getnode(node),
NULL,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_MODIFIER);
if (ident_node == NULL) {
/* properties must have an operator
* http://www.w3.org/TR/WebIDL/#idl-attributes
*/
return 1;
} else {
if (webidl_node_getint(modifier_node) == WEBIDL_TYPE_READONLY) {
fprintf(binding->outfile,
"\tJSAPI_PS_RO(%s, 0, JSPROP_ENUMERATE | JSPROP_SHARED),\n",
webidl_node_gettext(ident_node));
} else {
fprintf(binding->outfile,
"\tJSAPI_PS(%s, 0, JSPROP_ENUMERATE | JSPROP_SHARED),\n",
webidl_node_gettext(ident_node));
}
}
return 0;
}
static int generate_property_spec(struct binding *binding, const char *interface);
/* callback to emit implements property spec */
static int webidl_property_spec_implements_cb(struct webidl_node *node, void *ctx)
{
struct binding *binding = ctx;
return generate_property_spec(binding, webidl_node_gettext(node));
}
static int
generate_property_spec(struct binding *binding, const char *interface)
{
struct webidl_node *interface_node;
struct webidl_node *members_node;
struct webidl_node *inherit_node;
int res = 0;
/* find interface in webidl with correct ident attached */
interface_node = webidl_node_find_type_ident(binding->wi_ast,
WEBIDL_NODE_TYPE_INTERFACE,
interface);
if (interface_node == NULL) {
fprintf(stderr,
"Unable to find interface %s in loaded WebIDL\n",
interface);
return -1;
}
members_node = webidl_node_find(webidl_node_getnode(interface_node),
NULL,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_LIST);
while (members_node != NULL) {
fprintf(binding->outfile,"\t/**** %s ****/\n", interface);
/* for each function emit a JSAPI_FS()*/
webidl_node_for_each_type(webidl_node_getnode(members_node),
WEBIDL_NODE_TYPE_ATTRIBUTE,
webidl_property_spec_cb,
binding);
members_node = webidl_node_find(webidl_node_getnode(interface_node),
members_node,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_LIST);
}
/* check for inherited nodes and insert them too */
inherit_node = webidl_node_find(webidl_node_getnode(interface_node),
NULL,
webidl_cmp_node_type,
(void *)WEBIDL_NODE_TYPE_INTERFACE_INHERITANCE);
if (inherit_node != NULL) {
res = generate_property_spec(binding,
webidl_node_gettext(inherit_node));
}
if (res == 0) {
res = webidl_node_for_each_type(webidl_node_getnode(interface_node),
WEBIDL_NODE_TYPE_INTERFACE_IMPLEMENTS,
webidl_property_spec_implements_cb,
binding);
}
return res;
}
int
output_property_spec(struct binding *binding)
{
int res;
fprintf(binding->outfile,
"static JSPropertySpec jsclass_properties[] = {\n");
res = generate_property_spec(binding, binding->interface);
fprintf(binding->outfile, "\tJSAPI_PS_END\n};\n\n");
return res;
}
static int output_return(struct binding *binding,
const char *ident,
struct webidl_node *node)
{
struct webidl_node *type_node = NULL;
struct webidl_node *type_base = NULL;
enum webidl_type webidl_arg_type;
type_node = webidl_node_find_type(webidl_node_getnode(node),
NULL,
WEBIDL_NODE_TYPE_TYPE);
type_base = webidl_node_find_type(webidl_node_getnode(type_node),
NULL,
WEBIDL_NODE_TYPE_TYPE_BASE);
webidl_arg_type = webidl_node_getint(type_base);
switch (webidl_arg_type) {
case WEBIDL_TYPE_USER:
/* User type are represented with jsobject */
fprintf(binding->outfile,
"\tJS_SET_RVAL(cx, vp, OBJECT_TO_JSVAL(%s));\n",
ident);
break;
case WEBIDL_TYPE_BOOL:
/* JSBool */
fprintf(binding->outfile,
"\tJS_SET_RVAL(cx, vp, BOOLEAN_TO_JSVAL(%s));\n",
ident);
break;
case WEBIDL_TYPE_BYTE:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_BYTE");
break;
case WEBIDL_TYPE_OCTET:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_OCTET");
break;
case WEBIDL_TYPE_FLOAT:
case WEBIDL_TYPE_DOUBLE:
/* double */
fprintf(binding->outfile,
"\tJS_SET_RVAL(cx, vp, DOUBLE_TO_JSVAL(%s));\n",
ident);
break;
case WEBIDL_TYPE_SHORT:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_SHORT");
break;
case WEBIDL_TYPE_LONGLONG:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_LONGLONG");
break;
case WEBIDL_TYPE_LONG:
/* int32_t */
fprintf(binding->outfile,
"\tJS_SET_RVAL(cx, vp, INT_TO_JSVAL(%s));\n",
ident);
break;
case WEBIDL_TYPE_STRING:
/* JSString * */
fprintf(binding->outfile,
"\tJS_SET_RVAL(cx, vp, JSAPI_STRING_TO_JSVAL(%s));\n",
ident);
break;
case WEBIDL_TYPE_SEQUENCE:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_SEQUENCE");
break;
case WEBIDL_TYPE_OBJECT:
/* JSObject * */
fprintf(binding->outfile,
"\tJS_SET_RVAL(cx, vp, OBJECT_TO_JSVAL(%s));\n",
ident);
break;
case WEBIDL_TYPE_DATE:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_DATE");
break;
case WEBIDL_TYPE_VOID:
/* specifically requires no value */
break;
default:
break;
}
return 0;
}
/* generate variable declaration of the correct type with appropriate default */
static int output_return_declaration(struct binding *binding,
const char *ident,
struct webidl_node *node)
{
struct webidl_node *type_node = NULL;
struct webidl_node *type_base = NULL;
struct webidl_node *type_name = NULL;
struct webidl_node *type_mod = NULL;
enum webidl_type webidl_arg_type;
type_node = webidl_node_find_type(webidl_node_getnode(node),
NULL,
WEBIDL_NODE_TYPE_TYPE);
type_base = webidl_node_find_type(webidl_node_getnode(type_node),
NULL,
WEBIDL_NODE_TYPE_TYPE_BASE);
webidl_arg_type = webidl_node_getint(type_base);
switch (webidl_arg_type) {
case WEBIDL_TYPE_USER:
/* User type are represented with jsobject */
type_name = webidl_node_find_type(webidl_node_getnode(type_node),
NULL,
WEBIDL_NODE_TYPE_IDENT);
fprintf(binding->outfile,
"\tJSObject *%s = NULL; /* %s */\n",
ident,
webidl_node_gettext(type_name));
break;
case WEBIDL_TYPE_BOOL:
/* JSBool */
fprintf(binding->outfile, "\tJSBool %s = JS_FALSE;\n",ident);
break;
case WEBIDL_TYPE_BYTE:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_BYTE");
break;
case WEBIDL_TYPE_OCTET:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_OCTET");
break;
case WEBIDL_TYPE_FLOAT:
case WEBIDL_TYPE_DOUBLE:
/* double */
fprintf(binding->outfile, "\tdouble %s = 0;\n", ident);
break;
case WEBIDL_TYPE_SHORT:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_SHORT");
break;
case WEBIDL_TYPE_LONGLONG:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_LONGLONG");
break;
case WEBIDL_TYPE_LONG:
/* int32_t */
type_mod = webidl_node_find_type(webidl_node_getnode(type_node),
NULL,
WEBIDL_NODE_TYPE_MODIFIER);
if ((type_mod != NULL) &&
(webidl_node_getint(type_mod) == WEBIDL_TYPE_MODIFIER_UNSIGNED)) {
fprintf(binding->outfile,
"\tuint32_t %s = 0;\n",
ident);
} else {
fprintf(binding->outfile,
"\tint32_t %s = 0;\n",
ident);
}
break;
case WEBIDL_TYPE_STRING:
/* JSString * */
fprintf(binding->outfile,
"\tJSString *%s = NULL;\n",
ident);
break;
case WEBIDL_TYPE_SEQUENCE:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_SEQUENCE");
break;
case WEBIDL_TYPE_OBJECT:
/* JSObject * */
fprintf(binding->outfile, "\tJSObject *%s = NULL;\n", ident);
break;
case WEBIDL_TYPE_DATE:
WARN(WARNING_UNIMPLEMENTED, "Unhandled type WEBIDL_TYPE_DATE");
break;
case WEBIDL_TYPE_VOID:
/* specifically requires no value */
break;
default:
break;
}
return 0;
}
static int
output_property_placeholder(struct binding *binding,
struct webidl_node* oplist,
const char *ident)
{
oplist=oplist;
WARN(WARNING_UNIMPLEMENTED,
"property %s.%s has no implementation\n",
binding->interface,
ident);
fprintf(binding->outfile,
"\tJSLOG(\"property %s.%s has no implementation\");\n",
binding->interface,
ident);
return 0;
}
static int output_property_getter(struct binding *binding,
struct webidl_node *node,
const char *ident)
{
struct genbind_node *property_node;
fprintf(binding->outfile,
"static JSBool JSAPI_PROPERTYGET(%s, JSContext *cx, JSObject *obj, jsval *vp)\n"
"{\n",
ident);
/* return value declaration */
output_return_declaration(binding, "jsret", node);
if (binding->has_private) {
/* get context */
fprintf(binding->outfile,
"\tstruct jsclass_private *private;\n"
"\n"
"\tprivate = JS_GetInstancePrivate(cx,\n"
"\t\tobj,\n"
"\t\t&JSClass_%s,\n"
"\t\tNULL);\n"
"\tif (private == NULL)\n"
"\t\treturn JS_FALSE;\n\n",
binding->interface);
}
property_node = genbind_node_find_type_ident(binding->gb_ast,
NULL,
GENBIND_NODE_TYPE_GETTER,
ident);
if (property_node != NULL) {
/* binding source block */
output_code_block(binding, genbind_node_getnode(property_node));
} else {
/* examine internal variables and see if they are gettable */
struct genbind_node *binding_node;
struct genbind_node *internal_node = NULL;
binding_node = genbind_node_find_type(binding->gb_ast,
NULL,
GENBIND_NODE_TYPE_BINDING);
if (binding_node != NULL) {
internal_node = genbind_node_find_type_ident(genbind_node_getnode(binding_node),
NULL,
GENBIND_NODE_TYPE_BINDING_INTERNAL,
ident);
}
if (internal_node != NULL) {
/** @todo fetching from internal entries ought to be type sensitive */
fprintf(binding->outfile,
"\tjsret = private->%s;\n",
ident);
} else {
output_property_placeholder(binding, node, ident);
}
}
output_return(binding, "jsret", node);
fprintf(binding->outfile,
"\treturn JS_TRUE;\n"
"}\n\n");
return 0;
}
static int webidl_property_body_cb(struct webidl_node *node, void *ctx)
{
struct binding *binding = ctx;
struct webidl_node *ident_node;
struct webidl_node *modifier_node;
ident_node = webidl_node_find_type(webidl_node_getnode(node),
NULL,
WEBIDL_NODE_TYPE_IDENT);
if (ident_node == NULL) {
/* properties must have an operator
* http://www.w3.org/TR/WebIDL/#idl-attributes
*/
return 1;
}
modifier_node = webidl_node_find_type(webidl_node_getnode(node),
NULL,
WEBIDL_NODE_TYPE_MODIFIER);
if (webidl_node_getint(modifier_node) != WEBIDL_TYPE_READONLY) {
/* no readonly so a set function is required */
fprintf(binding->outfile,
"static JSBool JSAPI_PROPERTYSET(%s, JSContext *cx, JSObject *obj, jsval *vp)\n",
webidl_node_gettext(ident_node));
fprintf(binding->outfile,
"{\n"
" return JS_FALSE;\n"
"}\n\n");
}
/* property getter */
return output_property_getter(binding, node, webidl_node_gettext(ident_node));
}
/* callback to emit implements property bodys */
static int webidl_implements_cb(struct webidl_node *node, void *ctx)
{
struct binding *binding = ctx;
return output_property_body(binding, webidl_node_gettext(node));
}
int
output_property_body(struct binding *binding, const char *interface)
{
struct webidl_node *interface_node;
struct webidl_node *members_node;
struct webidl_node *inherit_node;
int res = 0;
/* find interface in webidl with correct ident attached */
interface_node = webidl_node_find_type_ident(binding->wi_ast,
WEBIDL_NODE_TYPE_INTERFACE,
interface);
if (interface_node == NULL) {
fprintf(stderr,
"Unable to find interface %s in loaded WebIDL\n",
interface);
return -1;
}
members_node = webidl_node_find_type(webidl_node_getnode(interface_node),
NULL,
WEBIDL_NODE_TYPE_LIST);
while (members_node != NULL) {
fprintf(binding->outfile,"/**** %s ****/\n", interface);
/* for each function emit property body */
webidl_node_for_each_type(webidl_node_getnode(members_node),
WEBIDL_NODE_TYPE_ATTRIBUTE,
webidl_property_body_cb,
binding);
members_node = webidl_node_find_type(webidl_node_getnode(interface_node),
members_node,
WEBIDL_NODE_TYPE_LIST);
}
/* check for inherited nodes and insert them too */
inherit_node = webidl_node_find_type(webidl_node_getnode(interface_node),
NULL,
WEBIDL_NODE_TYPE_INTERFACE_INHERITANCE);
if (inherit_node != NULL) {
res = output_property_body(binding,
webidl_node_gettext(inherit_node));
}
if (res == 0) {
res = webidl_node_for_each_type(webidl_node_getnode(interface_node),
WEBIDL_NODE_TYPE_INTERFACE_IMPLEMENTS,
webidl_implements_cb,
binding);
}
return res;
}
|
