| /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
| /* |
| * Copyright (c) 2004, Apple Inc. and The Mozilla Foundation. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the names of Apple Inc. ("Apple") or The Mozilla |
| * Foundation ("Mozilla") nor the names of their contributors may be used |
| * to endorse or promote products derived from this software without |
| * specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE, MOZILLA AND THEIR CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
| * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE, MOZILLA OR |
| * THEIR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED |
| * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| #ifndef _NP_RUNTIME_H_ |
| #define _NP_RUNTIME_H_ |
| |
| #include "npapi.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* |
| This API is used to facilitate binding code written in C to script |
| objects. The API in this header does not assume the presence of a |
| user agent. That is, it can be used to bind C code to scripting |
| environments outside of the context of a user agent. |
| |
| However, the normal use of the this API is in the context of a |
| scripting environment running in a browser or other user agent. |
| In particular it is used to support the extended Netscape |
| script-ability API for plugins (NP-SAP). NP-SAP is an extension |
| of the Netscape plugin API. As such we have adopted the use of |
| the "NP" prefix for this API. |
| |
| The following NP{N|P}Variables were added to the Netscape plugin |
| API (in npapi.h): |
| |
| NPNVWindowNPObject |
| NPNVPluginElementNPObject |
| NPPVpluginScriptableNPObject |
| |
| These variables are exposed through NPN_GetValue() and |
| NPP_GetValue() (respectively) and are used to establish the |
| initial binding between the user agent and native code. The DOM |
| objects in the user agent can be examined and manipulated using |
| the NPN_ functions that operate on NPObjects described in this |
| header. |
| |
| To the extent possible the assumptions about the scripting |
| language used by the scripting environment have been minimized. |
| */ |
| |
| #define NP_BEGIN_MACRO do { |
| #define NP_END_MACRO } while (0) |
| |
| /* |
| Objects (non-primitive data) passed between 'C' and script is |
| always wrapped in an NPObject. The 'interface' of an NPObject is |
| described by an NPClass. |
| */ |
| typedef struct NPObject NPObject; |
| typedef struct NPClass NPClass; |
| |
| typedef char NPUTF8; |
| typedef struct _NPString { |
| const NPUTF8 *UTF8Characters; |
| uint32_t UTF8Length; |
| } NPString; |
| |
| typedef enum { |
| NPVariantType_Void, |
| NPVariantType_Null, |
| NPVariantType_Bool, |
| NPVariantType_Int32, |
| NPVariantType_Double, |
| NPVariantType_String, |
| NPVariantType_Object |
| } NPVariantType; |
| |
| typedef struct _NPVariant { |
| NPVariantType type; |
| union { |
| bool boolValue; |
| int32_t intValue; |
| double doubleValue; |
| NPString stringValue; |
| NPObject *objectValue; |
| } value; |
| } NPVariant; |
| |
| /* |
| NPN_ReleaseVariantValue is called on all 'out' parameters |
| references. Specifically it is to be called on variants that own |
| their value, as is the case with all non-const NPVariant* |
| arguments after a successful call to any methods (except this one) |
| in this API. |
| |
| After calling NPN_ReleaseVariantValue, the type of the variant |
| will be NPVariantType_Void. |
| */ |
| void NPN_ReleaseVariantValue(NPVariant *variant); |
| |
| #define NPVARIANT_IS_VOID(_v) ((_v).type == NPVariantType_Void) |
| #define NPVARIANT_IS_NULL(_v) ((_v).type == NPVariantType_Null) |
| #define NPVARIANT_IS_BOOLEAN(_v) ((_v).type == NPVariantType_Bool) |
| #define NPVARIANT_IS_INT32(_v) ((_v).type == NPVariantType_Int32) |
| #define NPVARIANT_IS_DOUBLE(_v) ((_v).type == NPVariantType_Double) |
| #define NPVARIANT_IS_STRING(_v) ((_v).type == NPVariantType_String) |
| #define NPVARIANT_IS_OBJECT(_v) ((_v).type == NPVariantType_Object) |
| |
| #define NPVARIANT_TO_BOOLEAN(_v) ((_v).value.boolValue) |
| #define NPVARIANT_TO_INT32(_v) ((_v).value.intValue) |
| #define NPVARIANT_TO_DOUBLE(_v) ((_v).value.doubleValue) |
| #define NPVARIANT_TO_STRING(_v) ((_v).value.stringValue) |
| #define NPVARIANT_TO_OBJECT(_v) ((_v).value.objectValue) |
| |
| #define VOID_TO_NPVARIANT(_v) \ |
| NP_BEGIN_MACRO \ |
| (_v).type = NPVariantType_Void; \ |
| (_v).value.objectValue = NULL; \ |
| NP_END_MACRO |
| |
| #define NULL_TO_NPVARIANT(_v) \ |
| NP_BEGIN_MACRO \ |
| (_v).type = NPVariantType_Null; \ |
| (_v).value.objectValue = NULL; \ |
| NP_END_MACRO |
| |
| #define BOOLEAN_TO_NPVARIANT(_val, _v) \ |
| NP_BEGIN_MACRO \ |
| (_v).type = NPVariantType_Bool; \ |
| (_v).value.boolValue = !!(_val); \ |
| NP_END_MACRO |
| |
| #define INT32_TO_NPVARIANT(_val, _v) \ |
| NP_BEGIN_MACRO \ |
| (_v).type = NPVariantType_Int32; \ |
| (_v).value.intValue = _val; \ |
| NP_END_MACRO |
| |
| #define DOUBLE_TO_NPVARIANT(_val, _v) \ |
| NP_BEGIN_MACRO \ |
| (_v).type = NPVariantType_Double; \ |
| (_v).value.doubleValue = _val; \ |
| NP_END_MACRO |
| |
| #define STRINGZ_TO_NPVARIANT(_val, _v) \ |
| NP_BEGIN_MACRO \ |
| (_v).type = NPVariantType_String; \ |
| NPString str = { _val, uint32_t(strlen(_val)) }; \ |
| (_v).value.stringValue = str; \ |
| NP_END_MACRO |
| |
| #define STRINGN_TO_NPVARIANT(_val, _len, _v) \ |
| NP_BEGIN_MACRO \ |
| (_v).type = NPVariantType_String; \ |
| NPString str = { _val, uint32_t(_len) }; \ |
| (_v).value.stringValue = str; \ |
| NP_END_MACRO |
| |
| #define OBJECT_TO_NPVARIANT(_val, _v) \ |
| NP_BEGIN_MACRO \ |
| (_v).type = NPVariantType_Object; \ |
| (_v).value.objectValue = _val; \ |
| NP_END_MACRO |
| |
| |
| /* |
| Type mappings (JavaScript types have been used for illustration |
| purposes): |
| |
| JavaScript to C (NPVariant with type:) |
| undefined NPVariantType_Void |
| null NPVariantType_Null |
| Boolean NPVariantType_Bool |
| Number NPVariantType_Double or NPVariantType_Int32 |
| String NPVariantType_String |
| Object NPVariantType_Object |
| |
| C (NPVariant with type:) to JavaScript |
| NPVariantType_Void undefined |
| NPVariantType_Null null |
| NPVariantType_Bool Boolean |
| NPVariantType_Int32 Number |
| NPVariantType_Double Number |
| NPVariantType_String String |
| NPVariantType_Object Object |
| */ |
| |
| typedef void *NPIdentifier; |
| |
| /* |
| NPObjects have methods and properties. Methods and properties are |
| identified with NPIdentifiers. These identifiers may be reflected |
| in script. NPIdentifiers can be either strings or integers, IOW, |
| methods and properties can be identified by either strings or |
| integers (i.e. foo["bar"] vs foo[1]). NPIdentifiers can be |
| compared using ==. In case of any errors, the requested |
| NPIdentifier(s) will be NULL. NPIdentifier lifetime is controlled |
| by the browser. Plugins do not need to worry about memory management |
| with regards to NPIdentifiers. |
| */ |
| NPIdentifier NPN_GetStringIdentifier(const NPUTF8 *name); |
| void NPN_GetStringIdentifiers(const NPUTF8 **names, int32_t nameCount, |
| NPIdentifier *identifiers); |
| NPIdentifier NPN_GetIntIdentifier(int32_t intid); |
| bool NPN_IdentifierIsString(NPIdentifier identifier); |
| |
| /* |
| The NPUTF8 returned from NPN_UTF8FromIdentifier SHOULD be freed. |
| */ |
| NPUTF8 *NPN_UTF8FromIdentifier(NPIdentifier identifier); |
| |
| /* |
| Get the integer represented by identifier. If identifier is not an |
| integer identifier, the behaviour is undefined. |
| */ |
| int32_t NPN_IntFromIdentifier(NPIdentifier identifier); |
| |
| /* |
| NPObject behavior is implemented using the following set of |
| callback functions. |
| |
| The NPVariant *result argument of these functions (where |
| applicable) should be released using NPN_ReleaseVariantValue(). |
| */ |
| typedef NPObject *(*NPAllocateFunctionPtr)(NPP npp, NPClass *aClass); |
| typedef void (*NPDeallocateFunctionPtr)(NPObject *npobj); |
| typedef void (*NPInvalidateFunctionPtr)(NPObject *npobj); |
| typedef bool (*NPHasMethodFunctionPtr)(NPObject *npobj, NPIdentifier name); |
| typedef bool (*NPInvokeFunctionPtr)(NPObject *npobj, NPIdentifier name, |
| const NPVariant *args, uint32_t argCount, |
| NPVariant *result); |
| typedef bool (*NPInvokeDefaultFunctionPtr)(NPObject *npobj, |
| const NPVariant *args, |
| uint32_t argCount, |
| NPVariant *result); |
| typedef bool (*NPHasPropertyFunctionPtr)(NPObject *npobj, NPIdentifier name); |
| typedef bool (*NPGetPropertyFunctionPtr)(NPObject *npobj, NPIdentifier name, |
| NPVariant *result); |
| typedef bool (*NPSetPropertyFunctionPtr)(NPObject *npobj, NPIdentifier name, |
| const NPVariant *value); |
| typedef bool (*NPRemovePropertyFunctionPtr)(NPObject *npobj, |
| NPIdentifier name); |
| typedef bool (*NPEnumerationFunctionPtr)(NPObject *npobj, NPIdentifier **value, |
| uint32_t *count); |
| typedef bool (*NPConstructFunctionPtr)(NPObject *npobj, |
| const NPVariant *args, |
| uint32_t argCount, |
| NPVariant *result); |
| |
| /* |
| NPObjects returned by create, retain, invoke, and getProperty pass |
| a reference count to the caller. That is, the callee adds a |
| reference count which passes to the caller. It is the caller's |
| responsibility to release the returned object. |
| |
| NPInvokeFunctionPtr function may return 0 to indicate a void |
| result. |
| |
| NPInvalidateFunctionPtr is called by the scripting environment |
| when the native code is shutdown. Any attempt to message a |
| NPObject instance after the invalidate callback has been |
| called will result in undefined behavior, even if the native code |
| is still retaining those NPObject instances. (The runtime |
| will typically return immediately, with 0 or NULL, from an attempt |
| to dispatch to a NPObject, but this behavior should not be |
| depended upon.) |
| |
| The NPEnumerationFunctionPtr function may pass an array of |
| NPIdentifiers back to the caller. The callee allocs the memory of |
| the array using NPN_MemAlloc(), and it's the caller's responsibility |
| to release it using NPN_MemFree(). |
| */ |
| struct NPClass |
| { |
| uint32_t structVersion; |
| NPAllocateFunctionPtr allocate; |
| NPDeallocateFunctionPtr deallocate; |
| NPInvalidateFunctionPtr invalidate; |
| NPHasMethodFunctionPtr hasMethod; |
| NPInvokeFunctionPtr invoke; |
| NPInvokeDefaultFunctionPtr invokeDefault; |
| NPHasPropertyFunctionPtr hasProperty; |
| NPGetPropertyFunctionPtr getProperty; |
| NPSetPropertyFunctionPtr setProperty; |
| NPRemovePropertyFunctionPtr removeProperty; |
| NPEnumerationFunctionPtr enumerate; |
| NPConstructFunctionPtr construct; |
| }; |
| |
| #define NP_CLASS_STRUCT_VERSION 3 |
| |
| #define NP_CLASS_STRUCT_VERSION_ENUM 2 |
| #define NP_CLASS_STRUCT_VERSION_CTOR 3 |
| |
| #define NP_CLASS_STRUCT_VERSION_HAS_ENUM(npclass) \ |
| ((npclass)->structVersion >= NP_CLASS_STRUCT_VERSION_ENUM) |
| |
| #define NP_CLASS_STRUCT_VERSION_HAS_CTOR(npclass) \ |
| ((npclass)->structVersion >= NP_CLASS_STRUCT_VERSION_CTOR) |
| |
| struct NPObject { |
| NPClass *_class; |
| uint32_t referenceCount; |
| /* |
| * Additional space may be allocated here by types of NPObjects |
| */ |
| }; |
| |
| /* |
| If the class has an allocate function, NPN_CreateObject invokes |
| that function, otherwise a NPObject is allocated and |
| returned. This method will initialize the referenceCount member of |
| the NPObject to 1. |
| */ |
| NPObject *NPN_CreateObject(NPP npp, NPClass *aClass); |
| |
| /* |
| Increment the NPObject's reference count. |
| */ |
| NPObject *NPN_RetainObject(NPObject *npobj); |
| |
| /* |
| Decremented the NPObject's reference count. If the reference |
| count goes to zero, the class's destroy function is invoke if |
| specified, otherwise the object is freed directly. |
| */ |
| void NPN_ReleaseObject(NPObject *npobj); |
| |
| /* |
| Functions to access script objects represented by NPObject. |
| |
| Calls to script objects are synchronous. If a function returns a |
| value, it will be supplied via the result NPVariant |
| argument. Successful calls will return true, false will be |
| returned in case of an error. |
| |
| Calls made from plugin code to script must be made from the thread |
| on which the plugin was initialized. |
| */ |
| |
| bool NPN_Invoke(NPP npp, NPObject *npobj, NPIdentifier methodName, |
| const NPVariant *args, uint32_t argCount, NPVariant *result); |
| bool NPN_InvokeDefault(NPP npp, NPObject *npobj, const NPVariant *args, |
| uint32_t argCount, NPVariant *result); |
| bool NPN_Evaluate(NPP npp, NPObject *npobj, NPString *script, |
| NPVariant *result); |
| bool NPN_GetProperty(NPP npp, NPObject *npobj, NPIdentifier propertyName, |
| NPVariant *result); |
| bool NPN_SetProperty(NPP npp, NPObject *npobj, NPIdentifier propertyName, |
| const NPVariant *value); |
| bool NPN_RemoveProperty(NPP npp, NPObject *npobj, NPIdentifier propertyName); |
| bool NPN_HasProperty(NPP npp, NPObject *npobj, NPIdentifier propertyName); |
| bool NPN_HasMethod(NPP npp, NPObject *npobj, NPIdentifier methodName); |
| bool NPN_Enumerate(NPP npp, NPObject *npobj, NPIdentifier **identifier, |
| uint32_t *count); |
| bool NPN_Construct(NPP npp, NPObject *npobj, const NPVariant *args, |
| uint32_t argCount, NPVariant *result); |
| |
| /* |
| NPN_SetException may be called to trigger a script exception upon |
| return from entry points into NPObjects. Typical usage: |
| |
| NPN_SetException (npobj, message); |
| */ |
| void NPN_SetException(NPObject *npobj, const NPUTF8 *message); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |
