src/xwalk/extensions/test/get_runtime_variable.c

   1 // Copyright (c) 2013 Intel Corporation. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #if defined(__cplusplus)
   6 #error "This file is written in C to make sure the C API works as intended."
   7 #endif
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include "xwalk/extensions/public/XW_Extension.h"
  12 #include "xwalk/extensions/public/XW_Extension_Runtime.h"
  13 #include "xwalk/extensions/public/XW_Extension_SyncMessage.h"
  14
  15 static XW_Extension g_extension;
  16 static const XW_CoreInterface* g_core;
  17 static const XW_MessagingInterface* g_messaging;
  18 static const XW_Internal_SyncMessagingInterface* g_sync_messaging;
  19 static const XW_Internal_RuntimeInterface* g_runtime;
  20
  21 void instance_created(XW_Instance instance) {
  22   printf("Instance %d created!\n", instance);
  23 }
  24
  25 void instance_destroyed(XW_Instance instance) {
  26   printf("Instance %d destroyed!\n", instance);
  27 }
  28
  29 void handle_message(XW_Instance instance, const char* message) {
  30   g_messaging->PostMessage(instance, message);
  31 }
  32
  33 void handle_sync_message(XW_Instance instance, const char* message) {
  34   static char out[8192];
  35   g_runtime->GetRuntimeVariableString(g_extension, message, out, sizeof(out));
  36   g_sync_messaging->SetSyncReply(instance, out);
  37 }
  38
  39 void shutdown(XW_Extension extension) {
  40   printf("Shutdown\n");
  41 }
  42
  43 int32_t XW_Initialize(XW_Extension extension, XW_GetInterface get_interface) {
  44   static const char* kAPI =
  45       "exports.getVariable = function(name) {"
  46       "  return JSON.parse(extension.internal.sendSyncMessage(name));"
  47       "};";
  48
  49   g_extension = extension;
  50   g_core = get_interface(XW_CORE_INTERFACE);
  51   g_core->SetExtensionName(extension, "runtime");
  52   g_core->SetJavaScriptAPI(extension, kAPI);
  53   g_core->RegisterInstanceCallbacks(
  54       extension, instance_created, instance_destroyed);
  55   g_core->RegisterShutdownCallback(extension, shutdown);
  56
  57   g_messaging = get_interface(XW_MESSAGING_INTERFACE);
  58   g_messaging->Register(extension, handle_message);
  59
  60   g_sync_messaging = get_interface(XW_INTERNAL_SYNC_MESSAGING_INTERFACE);
  61   g_sync_messaging->Register(extension, handle_sync_message);
  62
  63   g_runtime = get_interface(XW_INTERNAL_RUNTIME_INTERFACE);
  64   if (!g_runtime)
  65     return XW_ERROR;
  66
  67   return XW_OK;
  68 }