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97 lines
3.4 KiB
97 lines
3.4 KiB
9 years ago
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/* Copyright 2014 The Chromium Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* From ppp_message_handler.idl modified Wed Sep 24 10:48:49 2014. */
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#ifndef PPAPI_C_PPP_MESSAGE_HANDLER_H_
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#define PPAPI_C_PPP_MESSAGE_HANDLER_H_
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#include "pp_bool.h"
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#include "pp_instance.h"
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#include "pp_macros.h"
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#include "pp_stdint.h"
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#include "pp_var.h"
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/**
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* @file
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* This file defines the <code>PPP_MessageHandler</code> interface that plugins
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* can implement and register using PPB_Messaging::RegisterMessageHandler in
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* order to handle messages sent from JavaScript via postMessage() or
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* postMessageAndAwaitResponse().
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*/
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/**
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* @addtogroup Interfaces
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* @{
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*/
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/**
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* The <code>PPP_MessageHandler</code> interface is implemented by the plugin
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* if the plugin wants to receive messages from a thread other than the main
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* Pepper thread, or if the plugin wants to handle blocking messages which
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* JavaScript may send via postMessageAndAwaitResponse().
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*
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* This interface struct should not be returned by PPP_GetInterface; instead it
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* must be passed as a parameter to PPB_Messaging::RegisterMessageHandler.
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*/
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struct PPP_MessageHandler_0_2 {
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/**
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* Invoked as a result of JavaScript invoking postMessage() on the plugin's
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* DOM element.
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*
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* @param[in] instance A <code>PP_Instance</code> identifying one instance
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* of a module.
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* @param[in] user_data is the same pointer which was provided by a call to
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* RegisterMessageHandler().
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* @param[in] message A copy of the parameter that JavaScript provided to
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* postMessage().
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*/
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void (*HandleMessage)(PP_Instance instance,
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void* user_data,
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const struct PP_Var* message);
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/**
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* Invoked as a result of JavaScript invoking postMessageAndAwaitResponse()
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* on the plugin's DOM element.
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*
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* NOTE: JavaScript execution is blocked during the duration of this call.
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* Hence, the plugin should respond as quickly as possible. For this reason,
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* blocking completion callbacks are disallowed while handling a blocking
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* message.
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*
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* @param[in] instance A <code>PP_Instance</code> identifying one instance
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* of a module.
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* @param[in] user_data is the same pointer which was provided by a call to
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* RegisterMessageHandler().
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* @param[in] message is a copy of the parameter that JavaScript provided
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* to postMessageAndAwaitResponse().
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* @param[out] response will be copied to a JavaScript object which is
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* returned as the result of postMessageAndAwaitResponse() to the invoking
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*
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*/
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void (*HandleBlockingMessage)(PP_Instance instance,
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void* user_data,
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const struct PP_Var* message,
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struct PP_Var* response);
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/**
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* Invoked when the handler object is no longer needed. After this, no more
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* calls will be made which pass this same value for <code>instance</code>
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* and <code>user_data</code>.
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*
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* @param[in] instance A <code>PP_Instance</code> identifying one instance
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* of a module.
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* @param[in] user_data is the same pointer which was provided by a call to
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* RegisterMessageHandler.
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*/
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void (*Destroy)(PP_Instance instance, void* user_data);
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};
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typedef struct PPP_MessageHandler_0_2 PPP_MessageHandler;
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/**
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* @}
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*/
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#endif /* PPAPI_C_PPP_MESSAGE_HANDLER_H_ */
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