ppapi/proxy/flash_clipboard_resource.cc

   1 // Copyright (c) 2012 The Chromium Authors. 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 #include "ppapi/proxy/flash_clipboard_resource.h"
   6
   7 #include "ipc/ipc_message.h"
   8 #include "ppapi/c/pp_errors.h"
   9 #include "ppapi/proxy/ppapi_messages.h"
  10 #include "ppapi/shared_impl/ppapi_globals.h"
  11 #include "ppapi/shared_impl/var.h"
  12 #include "ppapi/shared_impl/var_tracker.h"
  13
  14 namespace ppapi {
  15 namespace proxy {
  16
  17 namespace {
  18
  19 // Returns whether the given clipboard type is valid.
  20 bool IsValidClipboardType(PP_Flash_Clipboard_Type type) {
  21   return type == PP_FLASH_CLIPBOARD_TYPE_STANDARD ||
  22          type == PP_FLASH_CLIPBOARD_TYPE_SELECTION;
  23 }
  24
  25 // Convert a PP_Var to/from a string which is transmitted to the pepper host.
  26 // These functions assume the format is valid.
  27 bool PPVarToClipboardString(int32_t format,
  28                             const PP_Var& var,
  29                             std::string* string_out) {
  30   if (format == PP_FLASH_CLIPBOARD_FORMAT_PLAINTEXT ||
  31       format == PP_FLASH_CLIPBOARD_FORMAT_HTML) {
  32     StringVar* string_var = StringVar::FromPPVar(var);
  33     if (!string_var)
  34       return false;
  35     *string_out = string_var->value();
  36     return true;
  37   } else {
  38     // All other formats are expected to be array buffers.
  39     ArrayBufferVar* array_buffer_var = ArrayBufferVar::FromPPVar(var);
  40     if (!array_buffer_var)
  41       return false;
  42     *string_out = std::string(static_cast<const char*>(array_buffer_var->Map()),
  43                               array_buffer_var->ByteLength());
  44     return true;
  45   }
  46 }
  47
  48 PP_Var ClipboardStringToPPVar(int32_t format,
  49                               const std::string& string) {
  50   if (format == PP_FLASH_CLIPBOARD_FORMAT_PLAINTEXT ||
  51       format == PP_FLASH_CLIPBOARD_FORMAT_HTML) {
  52     return StringVar::StringToPPVar(string);
  53   } else {
  54     // All other formats are expected to be array buffers.
  55     return PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferPPVar(
  56         string.size(), string.data());
  57   }
  58 }
  59 }  // namespace
  60
  61 FlashClipboardResource::FlashClipboardResource(
  62     Connection connection, PP_Instance instance)
  63     : PluginResource(connection, instance) {
  64   SendCreate(BROWSER, PpapiHostMsg_FlashClipboard_Create());
  65 }
  66
  67 FlashClipboardResource::~FlashClipboardResource() {
  68 }
  69
  70 thunk::PPB_Flash_Clipboard_API*
  71 FlashClipboardResource::AsPPB_Flash_Clipboard_API() {
  72   return this;
  73 }
  74
  75 uint32_t FlashClipboardResource::RegisterCustomFormat(
  76     PP_Instance instance,
  77     const char* format_name) {
  78   // Check to see if the format has already been registered.
  79   uint32_t format = clipboard_formats_.GetFormatID(format_name);
  80   if (format != PP_FLASH_CLIPBOARD_FORMAT_INVALID)
  81     return format;
  82   int32_t result =
  83       SyncCall<PpapiPluginMsg_FlashClipboard_RegisterCustomFormatReply>(
  84           BROWSER,
  85           PpapiHostMsg_FlashClipboard_RegisterCustomFormat(format_name),
  86           &format);
  87   if (result != PP_OK || format == PP_FLASH_CLIPBOARD_FORMAT_INVALID)
  88     return PP_FLASH_CLIPBOARD_FORMAT_INVALID;
  89   clipboard_formats_.SetRegisteredFormat(format_name, format);
  90   return format;
  91 }
  92
  93 PP_Bool FlashClipboardResource::IsFormatAvailable(
  94     PP_Instance instance,
  95     PP_Flash_Clipboard_Type clipboard_type,
  96     uint32_t format) {
  97   if (IsValidClipboardType(clipboard_type) &&
  98       (FlashClipboardFormatRegistry::IsValidPredefinedFormat(format) ||
  99        clipboard_formats_.IsFormatRegistered(format))) {
 100     int32_t result = SyncCall<IPC::Message>(BROWSER,
 101         PpapiHostMsg_FlashClipboard_IsFormatAvailable(clipboard_type, format));
 102     return result == PP_OK ? PP_TRUE : PP_FALSE;
 103   }
 104   return PP_FALSE;
 105 }
 106
 107 PP_Var FlashClipboardResource::ReadData(
 108     PP_Instance instance,
 109     PP_Flash_Clipboard_Type clipboard_type,
 110     uint32_t format) {
 111   std::string value;
 112   int32_t result =
 113       SyncCall<PpapiPluginMsg_FlashClipboard_ReadDataReply>(
 114           BROWSER,
 115           PpapiHostMsg_FlashClipboard_ReadData(clipboard_type, format),
 116           &value);
 117   if (result != PP_OK)
 118     return PP_MakeUndefined();
 119
 120   return ClipboardStringToPPVar(format, value);
 121 }
 122
 123 int32_t FlashClipboardResource::WriteData(
 124     PP_Instance instance,
 125     PP_Flash_Clipboard_Type clipboard_type,
 126     uint32_t data_item_count,
 127     const uint32_t formats[],
 128     const PP_Var data_items[]) {
 129   if (!IsValidClipboardType(clipboard_type))
 130       return PP_ERROR_BADARGUMENT;
 131   std::vector<uint32_t> formats_vector;
 132   std::vector<std::string> data_items_vector;
 133   for (size_t i = 0; i < data_item_count; ++i) {
 134     if (!clipboard_formats_.IsFormatRegistered(formats[i]) &&
 135         !FlashClipboardFormatRegistry::IsValidPredefinedFormat(formats[i])) {
 136       return PP_ERROR_BADARGUMENT;
 137     }
 138     formats_vector.push_back(formats[i]);
 139     std::string string;
 140     if (!PPVarToClipboardString(formats[i], data_items[i], &string))
 141       return PP_ERROR_BADARGUMENT;
 142     data_items_vector.push_back(string);
 143   }
 144
 145   Post(BROWSER,
 146        PpapiHostMsg_FlashClipboard_WriteData(
 147            static_cast<uint32_t>(clipboard_type),
 148            formats_vector,
 149            data_items_vector));
 150
 151   // Assume success, since it allows us to avoid a sync IPC.
 152   return PP_OK;
 153 }
 154
 155 }  // namespace proxy
 156 }  // namespace ppapi