gecko-dev/lib/libmocha/lm_cmpnt.c

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C

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
/*
* JS reflection of Navigator Components.
*
* Created: Tom Pixley, 4/22/97
*
*/
#include "lm.h"
#include "prmem.h"
#include "np.h"
#include "net.h"
#include "fe_proto.h"
/*
* -----------------------------------------------------------------------
*
* Data types
*
* -----------------------------------------------------------------------
*/
typedef struct JSComponent
{
MochaDecoder *decoder;
JSObject *obj;
JSString *name;
ETBoolPtrFunc active_callback;
ETVoidPtrFunc startup_callback;
} JSComponent;
typedef struct JSComponentArray
{
MochaDecoder *decoder;
JSObject *obj;
jsint length;
} JSComponentArray;
typedef struct JSPreDefComponent
{
const char *name;
ETVerifyComponentFunc func;
} JSPreDefComponent;
static JSPreDefComponent predef_components[] =
{
{0}
};
/*
* -----------------------------------------------------------------------
*
* Reflection of an installed component.
*
* -----------------------------------------------------------------------
*/
enum component_slot
{
COMPONENT_NAME = -1,
COMPONENT_ACTIVE = -2
};
static JSPropertySpec component_props[] =
{
{"name", COMPONENT_NAME, JSPROP_ENUMERATE | JSPROP_READONLY},
{"active", COMPONENT_ACTIVE, JSPROP_ENUMERATE | JSPROP_READONLY},
{0}
};
extern JSClass lm_component_class;
PR_STATIC_CALLBACK(JSBool)
component_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSComponent *component;
JSString *str;
jsint slot;
if (!JSVAL_IS_INT(id))
return JS_TRUE;
slot = JSVAL_TO_INT(id);
component = JS_GetInstancePrivate(cx, obj, &lm_component_class, NULL);
if (!component)
return JS_TRUE;
switch (slot) {
case COMPONENT_NAME:
str = component->name;
if (str)
*vp = STRING_TO_JSVAL(str);
else
*vp = JS_GetEmptyStringValue(cx);
break;
case COMPONENT_ACTIVE:
*vp = JSVAL_FALSE;
if (ET_moz_CallFunctionBool((ETBoolPtrFunc)component->active_callback, NULL))
*vp = JSVAL_TRUE;
break;
default:
break;
}
return JS_TRUE;
}
PR_STATIC_CALLBACK(JSBool)
component_mozilla_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
char *name, *type_str, *get_str;
jsval type, func;
if (!JSVAL_IS_STRING(id))
return JS_TRUE;
name = JS_GetStringBytes(JSVAL_TO_STRING(id));
type_str = JS_malloc(cx, XP_STRLEN(lm_typePrefix_str) + XP_STRLEN(name) + 1);
get_str = JS_malloc(cx, XP_STRLEN(lm_getPrefix_str) + XP_STRLEN(name) + 1);
if (!type_str || !get_str)
return JS_TRUE;
XP_STRCPY(type_str, lm_typePrefix_str);
XP_STRCAT(type_str, name);
XP_STRCPY(get_str, lm_getPrefix_str);
XP_STRCAT(get_str, name);
if (!JS_GetProperty(cx, obj, type_str, &type) ||
!JSVAL_IS_INT(type) ||
!JS_GetProperty(cx, obj, get_str, &func))
return JS_TRUE;
JS_free(cx, type_str);
JS_free(cx, get_str);
switch(JSVAL_TO_INT(type)) {
case ARGTYPE_INT32:
*vp = INT_TO_JSVAL((int32)ET_moz_CompGetterFunction((ETCompPropGetterFunc)JSVAL_TO_INT(func), name));
break;
case ARGTYPE_BOOL:
*vp = BOOLEAN_TO_JSVAL((JSBool)ET_moz_CompGetterFunction((ETCompPropGetterFunc)JSVAL_TO_INT(func), name));
break;
case ARGTYPE_STRING:
*vp = STRING_TO_JSVAL(JS_NewStringCopyZ(cx,
(char*)ET_moz_CompGetterFunction((ETCompPropGetterFunc)JSVAL_TO_INT(func), name)));
break;
}
return JS_TRUE;
}
PR_STATIC_CALLBACK(JSBool)
component_mozilla_setProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
char *name, *type_str, *set_str, *prop_val;
jsval type, func;
if (!JSVAL_IS_STRING(id))
return JS_TRUE;
name = JS_GetStringBytes(JSVAL_TO_STRING(id));
type_str = JS_malloc(cx, XP_STRLEN(lm_typePrefix_str) + XP_STRLEN(name) + 1);
set_str = JS_malloc(cx, XP_STRLEN(lm_setPrefix_str) + XP_STRLEN(name) + 1);
if (!type_str || !set_str)
return JS_TRUE;
XP_STRCPY(type_str, lm_typePrefix_str);
XP_STRCAT(type_str, name);
XP_STRCPY(set_str, lm_setPrefix_str);
XP_STRCAT(set_str, name);
if (!JS_GetProperty(cx, obj, type_str, &type) ||
!JSVAL_IS_INT(type) ||
!JS_GetProperty(cx, obj, set_str, &func))
return JS_TRUE;
JS_free(cx, type_str);
JS_free(cx, set_str);
switch(JSVAL_TO_INT(type)) {
case ARGTYPE_INT32:
if (JSVAL_IS_INT(*vp))
ET_moz_CompSetterFunction((ETCompPropSetterFunc)JSVAL_TO_INT(func), name, (void*)JSVAL_TO_INT(*vp));
break;
case ARGTYPE_BOOL:
if (JSVAL_IS_BOOLEAN(*vp))
ET_moz_CompSetterFunction((ETCompPropSetterFunc)JSVAL_TO_INT(func), name, (void*)JSVAL_TO_BOOLEAN(*vp));
break;
case ARGTYPE_STRING:
if (JSVAL_IS_STRING(*vp)) {
prop_val = JS_GetStringBytes(JSVAL_TO_STRING(*vp));
ET_moz_CompSetterFunction((ETCompPropSetterFunc)JSVAL_TO_INT(func), name, (void*)prop_val);
}
break;
}
return JS_TRUE;
}
void
lm_RegisterComponentProp(const char *comp, const char *targetName,
uint8 retType, ETCompPropSetterFunc setter,
ETCompPropGetterFunc getter)
{
JSContext *cx;
JSObject *arrayObj, *obj;
jsval val;
char *type, *set, *get;
MochaDecoder *cd = LM_GetCrippledDecoder();
if (!comp || !targetName || !(cx = cd->js_context))
return;
arrayObj = lm_DefineComponents(cd);
if (!arrayObj)
return;
if (!JS_GetProperty(cx, arrayObj, comp, &val) ||
!JSVAL_IS_OBJECT(val))
return;
obj = JSVAL_TO_OBJECT(val);
if (!JS_DefineProperty(cx, obj, targetName, JSVAL_VOID, component_mozilla_getProperty,
component_mozilla_setProperty, 0)) {
}
type = JS_malloc(cx, XP_STRLEN(lm_typePrefix_str) + XP_STRLEN(targetName) + 1);
if (type) {
XP_STRCPY(type, lm_typePrefix_str);
XP_STRCAT(type, targetName);
if (!JS_DefineProperty(cx, obj, type,
INT_TO_JSVAL((int32)retType), 0, 0, JSPROP_READONLY)) {
}
JS_free(cx, type);
}
get = JS_malloc(cx, XP_STRLEN(lm_getPrefix_str) + XP_STRLEN(targetName) + 1);
if (get) {
XP_STRCPY(get, lm_getPrefix_str);
XP_STRCAT(get, targetName);
if (!JS_DefineProperty(cx, obj, get,
INT_TO_JSVAL(getter), 0, 0, JSPROP_READONLY)) {
}
JS_free(cx, get);
}
set = JS_malloc(cx, XP_STRLEN(lm_setPrefix_str) + XP_STRLEN(targetName) + 1);
if (set) {
XP_STRCPY(set, lm_setPrefix_str);
XP_STRCAT(set, targetName);
if (!JS_DefineProperty(cx, obj, set,
INT_TO_JSVAL(setter), 0, 0, JSPROP_READONLY)) {
}
JS_free(cx, set);
}
}
PR_STATIC_CALLBACK(JSBool)
component_resolve_name(JSContext *cx, JSObject *obj, jsval id)
{
return JS_TRUE;
}
PR_STATIC_CALLBACK(void)
component_finalize(JSContext *cx, JSObject *obj)
{
JSComponent* component;
component = JS_GetPrivate(cx, obj);
if (!component)
return;
JS_UnlockGCThing(cx, component->name);
DROP_BACK_COUNT(component->decoder);
JS_free(cx, component);
}
JSClass lm_component_class =
{
"Component", JSCLASS_HAS_PRIVATE,
JS_PropertyStub, JS_PropertyStub,
component_getProperty, component_getProperty, JS_EnumerateStub,
component_resolve_name, JS_ConvertStub, component_finalize
};
PR_STATIC_CALLBACK(JSBool)
component_activate(JSContext *cx, JSObject *obj, uint argc, jsval *argv, jsval *rval)
{
JSComponent *component;
component = JS_GetInstancePrivate(cx, obj, &lm_component_class, argv);
if (!component)
return JS_FALSE;
ET_moz_CallFunctionAsync((ETVoidPtrFunc)component->startup_callback, NULL);
return JS_TRUE;
}
static JSFunctionSpec component_methods[] =
{
{"activate", component_activate, 0},
{0}
};
PR_STATIC_CALLBACK(JSBool)
component_mozilla_method_stub(JSContext *cx, JSObject *obj, uint argc,
jsval *argv, jsval *rval)
{
JSFunction *func;
JSObject *func_obj;
jsval type, native;
uint i;
JSCompArg *comp_argv;
func = JS_ValueToFunction(cx, argv[-2]);
func_obj = JS_GetFunctionObject(func);
if (!JS_GetProperty(cx, func_obj, lm_typePrefix_str, &type) ||
!JSVAL_IS_INT(type) ||
!JS_GetProperty(cx, func_obj, lm_methodPrefix_str, &native) ||
!(comp_argv = JS_malloc(cx, argc * sizeof(JSCompArg))))
return JS_TRUE;
for (i=0; i<argc; i++) {
if (JSVAL_IS_INT(argv[i])) {
comp_argv[i].type = ARGTYPE_INT32;
comp_argv[i].value.intArg = JSVAL_TO_INT(argv[i]);
}
else if (JSVAL_IS_BOOLEAN(argv[i])) {
comp_argv[i].type = ARGTYPE_BOOL;
comp_argv[i].value.boolArg = JSVAL_TO_BOOLEAN(argv[i]);
}
else if (JSVAL_IS_STRING(argv[i])) {
comp_argv[i].type = ARGTYPE_STRING;
comp_argv[i].value.stringArg = JS_GetStringBytes(JSVAL_TO_STRING(argv[i]));
}
else {
comp_argv[i].type = ARGTYPE_NULL;
comp_argv[i].value.intArg = 0;
}
}
switch(JSVAL_TO_INT(type)) {
case ARGTYPE_NULL:
ET_moz_CompMethodFunction((ETCompMethodFunc)JSVAL_TO_INT(native), argc, NULL);
*rval = 0;
break;
case ARGTYPE_INT32:
*rval = INT_TO_JSVAL((int32)ET_moz_CompMethodFunction((ETCompMethodFunc)JSVAL_TO_INT(native), argc, comp_argv));
break;
case ARGTYPE_BOOL:
*rval = BOOLEAN_TO_JSVAL((JSBool)ET_moz_CompMethodFunction((ETCompMethodFunc)JSVAL_TO_INT(native), argc, comp_argv));
break;
case ARGTYPE_STRING:
*rval = STRING_TO_JSVAL(JS_NewStringCopyZ(cx,
(char*)ET_moz_CompMethodFunction((ETCompMethodFunc)JSVAL_TO_INT(native), argc, comp_argv)));
break;
}
return JS_TRUE;
}
void
lm_RegisterComponentMethod(const char *comp, const char *targetName,
uint8 retType, ETCompMethodFunc method, int32 argc)
{
JSContext *cx;
JSObject *arrayObj, *obj, *func_obj;
JSFunction *func;
jsval val;
MochaDecoder *cd = LM_GetCrippledDecoder();
if (!comp || !targetName || !(cx = cd->js_context))
return;
arrayObj = lm_DefineComponents(cd);
if (!arrayObj)
return;
if (!JS_GetProperty(cx, arrayObj, comp, &val) ||
!JSVAL_IS_OBJECT(val))
return;
obj = JSVAL_TO_OBJECT(val);
if (!(func = JS_DefineFunction(cx, obj, targetName, component_mozilla_method_stub, argc, 0))){
}
func_obj = JS_GetFunctionObject(func);
if (!JS_DefineProperty(cx, func_obj, lm_typePrefix_str,
INT_TO_JSVAL((int32)retType), 0, 0, JSPROP_READONLY))
return;
if (!JS_DefineProperty(cx, func_obj, lm_methodPrefix_str,
INT_TO_JSVAL(method), 0, 0, JSPROP_READONLY))
return;
if (!JS_DefineProperty(cx, func_obj, lm_methodArgc_str,
INT_TO_JSVAL(argc), 0, 0, JSPROP_READONLY))
return;
}
/* Constructor method for a JSComponent object */
static JSComponent*
component_create_self(JSContext *cx, MochaDecoder* decoder, JSComponent *component, const char *name)
{
JSObject *obj;
/* JSComponent may be malloc'd previous to this to make it easier
* to fill in the struct with data from the Mozilla thread
*/
if (!component) {
component = JS_malloc(cx, sizeof(JSComponent));
if (!component)
return NULL;
}
obj = JS_NewObject(cx, &lm_component_class, NULL, NULL);
if (!obj || !JS_SetPrivate(cx, obj, component)) {
JS_free(cx, component);
return NULL;
}
if (!JS_DefineProperties(cx, obj, component_props))
return NULL;
if (!JS_DefineFunctions(cx, obj, component_methods))
return NULL;
/* Fill out static property fields */
component->decoder = HOLD_BACK_COUNT(decoder);
component->obj = obj;
component->name = JS_NewStringCopyZ(cx, name);
if (!component->name || !JS_LockGCThing(cx, component->name))
return NULL;
return component;
}
/*
* -----------------------------------------------------------------------
*
* Reflection of the list of installed components.
* The only static property is the array length;
* the array elements (JSComponents) are added
* lazily when referenced.
*
* -----------------------------------------------------------------------
*/
enum componentarray_slot
{
COMPONENTLIST_ARRAY_LENGTH = -1
};
static JSPropertySpec componentarray_props[] =
{
{"length", COMPONENTLIST_ARRAY_LENGTH, JSPROP_READONLY},
{0}
};
/* Look up the component for the specified slot of the plug-in list */
static JSComponent*
componentarray_create_component(JSContext *cx, JSComponentArray *array,
JSComponent *component, const char *targetName, jsint targetSlot)
{
component = component_create_self(cx, array->decoder, component, targetName);
if (component) {
char *name;
jsval val;
name = JS_GetStringBytes(component->name);
val = OBJECT_TO_JSVAL(component->obj);
JS_DefineProperty(cx, array->obj, name, val, NULL, NULL,
JSPROP_ENUMERATE);
JS_AliasElement(cx, array->obj, name, targetSlot);
array->length++;
return component;
}
return NULL;
}
extern JSClass lm_component_array_class;
void
lm_RegisterComponent(const char *targetName, ETBoolPtrFunc active_callback,
ETVoidPtrFunc startup_callback)
{
JSContext *cx;
JSObject *arrayObj;
JSComponentArray *array;
JSComponent *component;
jsval val;
MochaDecoder *cd = LM_GetCrippledDecoder();
if (!(cx = cd->js_context) || !targetName)
return;
arrayObj = lm_DefineComponents(cd);
if (!arrayObj)
return;
array = JS_GetInstancePrivate(cx, arrayObj, &lm_component_array_class, NULL);
if (!array)
return;
if (JS_GetProperty(cx, arrayObj, targetName, &val) && JSVAL_IS_OBJECT(val)) {
/* We already have a component by this name. Update the active and
* startup callback funcs in case ours are out of date
*/
component = JS_GetPrivate(cx, JSVAL_TO_OBJECT(val));
if (!component)
return;
component->active_callback = active_callback;
component->startup_callback = startup_callback;
return;
}
component = JS_malloc(cx, sizeof(JSComponent));
if (!component)
return;
component->active_callback = active_callback;
component->startup_callback = startup_callback;
componentarray_create_component(cx, array, component, targetName, array->length);
}
PR_STATIC_CALLBACK(JSBool)
componentarray_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
JSComponentArray *array;
jsint slot;
if (!JSVAL_IS_INT(id))
return JS_TRUE;
slot = JSVAL_TO_INT(id);
array = JS_GetInstancePrivate(cx, obj, &lm_component_array_class, NULL);
if (!array)
return JS_TRUE;
switch (slot) {
case COMPONENTLIST_ARRAY_LENGTH:
*vp = INT_TO_JSVAL(array->length);
break;
default:
/* Don't mess with a user-defined property. */
if (slot >= 0 && slot < (jsint) array->length) {
/* Search for an existing JSComponent for this slot */
JSObject* componentObj = NULL;
jsval val = *vp;
if (JSVAL_IS_OBJECT(val)) {
componentObj = JSVAL_TO_OBJECT(val);
}
else {
JSComponent* component;
component = componentarray_create_component(cx, array, NULL,
NULL, slot);
if (component)
componentObj = component->obj;
}
*vp = OBJECT_TO_JSVAL(componentObj);
break;
}
}
return JS_TRUE;
}
PR_STATIC_CALLBACK(void)
componentarray_finalize(JSContext *cx, JSObject *obj)
{
JSComponentArray* array;
array = JS_GetPrivate(cx, obj);
if (!array)
return;
DROP_BACK_COUNT(array->decoder);
JS_free(cx, array);
}
JSClass lm_component_array_class =
{
"ComponentArray", JSCLASS_HAS_PRIVATE,
JS_PropertyStub, JS_PropertyStub,
componentarray_getProperty, componentarray_getProperty, JS_EnumerateStub,
JS_ResolveStub, JS_ConvertStub, componentarray_finalize
};
JSObject*
lm_DefineComponents(MochaDecoder *decoder)
{
JSObject *obj;
JSComponentArray *array;
JSContext *cx = decoder->js_context;
JSPreDefComponent def_comps;
JSComponent *component;
jsint slot;
obj = decoder->components;
if (obj)
return obj;
array = JS_malloc(cx, sizeof(JSComponentArray));
if (!array)
return NULL;
XP_BZERO(array, sizeof *array);
obj = JS_NewObject(cx, &lm_component_array_class, NULL,
decoder->window_object);
if (!obj || !JS_SetPrivate(cx, obj, array)) {
JS_free(cx, array);
return NULL;
}
if (!JS_DefineProperties(cx, obj, componentarray_props))
return NULL;
array->decoder = HOLD_BACK_COUNT(decoder);
array->obj = obj;
/* Components can be added dynamically but some are predefined */
slot = 0;
array->length = 0;
def_comps = predef_components[slot];
while (def_comps.name) {
component = JS_malloc(cx, sizeof(JSComponent));
if (!component)
return NULL;
if (ET_moz_VerifyComponentFunction(def_comps.func, &(component->active_callback),
&(component->startup_callback))) {
componentarray_create_component(cx, array, component, def_comps.name, array->length);
}
else {
/*Component call failed somewhere.*/
JS_free(cx, component);
}
def_comps = predef_components[++slot];
}
return obj;
}