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+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Copyright � 2004, Apple Computer, 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 Computer, 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.
+ *
+ * Revision 1 (March 4, 2004):
+ * Initial proposal.
+ *
+ * Revision 2 (March 10, 2004):
+ * All calls into script were made asynchronous. Results are
+ * provided via the NPScriptResultFunctionPtr callback.
+ *
+ * Revision 3 (March 10, 2004):
+ * Corrected comments to not refer to class retain/release FunctionPtrs.
+ *
+ * Revision 4 (March 11, 2004):
+ * Added additional convenience NPN_SetExceptionWithUTF8().
+ * Changed NPHasPropertyFunctionPtr and NPHasMethodFunctionPtr to take NPClass
+ * pointers instead of NPObject pointers.
+ * Added NPIsValidIdentifier().
+ *
+ * Revision 5 (March 17, 2004):
+ * Added context parameter to result callbacks from ScriptObject functions.
+ *
+ * Revision 6 (March 29, 2004):
+ * Renamed functions implemented by user agent to NPN_*. Removed _ from
+ * type names.
+ * Renamed "JavaScript" types to "Script".
+ *
+ * Revision 7 (April 21, 2004):
+ * NPIdentifier becomes a void*, was int32_t
+ * Remove NP_IsValidIdentifier, renamed NP_IdentifierFromUTF8 to NP_GetIdentifier
+ * Added NPVariant and modified functions to use this new type.
+ *
+ * Revision 8 (July 9, 2004):
+ * Updated to joint Apple-Mozilla license.
+ *
+ */
+#ifndef _NP_RUNTIME_H_
+#define _NP_RUNTIME_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "nptypes.h"
+
+/*
+ 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;
+ uint32_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, 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, _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 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);
+
+/*
+ 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.)
+*/
+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;
+};
+
+#define NP_CLASS_STRUCT_VERSION 1
+
+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);
+
+/*
+ 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
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