ppapi/cpp/dev/file_chooser_dev.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/cpp/dev/file_chooser_dev.h"
   6
   7 #include <string.h>
   8
   9 #include "ppapi/c/dev/ppb_file_chooser_dev.h"
  10 #include "ppapi/c/pp_errors.h"
  11 #include "ppapi/cpp/completion_callback.h"
  12 #include "ppapi/cpp/file_ref.h"
  13 #include "ppapi/cpp/instance_handle.h"
  14 #include "ppapi/cpp/module.h"
  15 #include "ppapi/cpp/module_impl.h"
  16
  17 namespace pp {
  18
  19 namespace {
  20
  21 template <> const char* interface_name<PPB_FileChooser_Dev_0_5>() {
  22   return PPB_FILECHOOSER_DEV_INTERFACE_0_5;
  23 }
  24
  25 template <> const char* interface_name<PPB_FileChooser_Dev_0_6>() {
  26   return PPB_FILECHOOSER_DEV_INTERFACE_0_6;
  27 }
  28
  29 }  // namespace
  30
  31 FileChooser_Dev::FileChooser_Dev(const InstanceHandle& instance,
  32                                  PP_FileChooserMode_Dev mode,
  33                                  const Var& accept_types) {
  34   if (has_interface<PPB_FileChooser_Dev_0_6>()) {
  35     PassRefFromConstructor(get_interface<PPB_FileChooser_Dev_0_6>()->Create(
  36         instance.pp_instance(), mode, accept_types.pp_var()));
  37   } else if (has_interface<PPB_FileChooser_Dev_0_5>()) {
  38     PassRefFromConstructor(get_interface<PPB_FileChooser_Dev_0_5>()->Create(
  39         instance.pp_instance(), mode, accept_types.pp_var()));
  40   }
  41 }
  42
  43 FileChooser_Dev::FileChooser_Dev(const FileChooser_Dev& other)
  44     : Resource(other) {
  45 }
  46
  47 int32_t FileChooser_Dev::Show(
  48     const CompletionCallbackWithOutput< std::vector<FileRef> >& callback) {
  49   if (has_interface<PPB_FileChooser_Dev_0_6>()) {
  50     return get_interface<PPB_FileChooser_Dev_0_6>()->Show(
  51         pp_resource(),
  52         callback.output(),
  53         callback.pp_completion_callback());
  54   }
  55   if (has_interface<PPB_FileChooser_Dev_0_5>()) {
  56     // Data for our callback wrapper. The callback handler will delete it.
  57     ChooseCallbackData0_5* data = new ChooseCallbackData0_5;
  58     data->file_chooser = pp_resource();
  59     data->output = callback.output();
  60     data->original_callback = callback.pp_completion_callback();
  61
  62     return get_interface<PPB_FileChooser_Dev_0_5>()->Show(
  63         pp_resource(), PP_MakeCompletionCallback(&CallbackConverter, data));
  64   }
  65   return callback.MayForce(PP_ERROR_NOINTERFACE);
  66 }
  67
  68 // static
  69 void FileChooser_Dev::CallbackConverter(void* user_data, int32_t result) {
  70   ChooseCallbackData0_5* data = static_cast<ChooseCallbackData0_5*>(user_data);
  71
  72   // Get all of the selected file resources using the iterator API.
  73   std::vector<PP_Resource> selected_files;
  74   if (result == PP_OK) {
  75     const PPB_FileChooser_Dev_0_5* chooser =
  76         get_interface<PPB_FileChooser_Dev_0_5>();
  77     while (PP_Resource cur = chooser->GetNextChosenFile(data->file_chooser))
  78       selected_files.push_back(cur);
  79   }
  80
  81   // Need to issue the "GetDataBuffer" even for error cases & when the
  82   // number of items is 0.
  83   void* output_buf = data->output.GetDataBuffer(
  84       data->output.user_data,
  85       static_cast<uint32_t>(selected_files.size()), sizeof(PP_Resource));
  86   if (output_buf) {
  87     if (!selected_files.empty()) {
  88       memcpy(output_buf, &selected_files[0],
  89              sizeof(PP_Resource) * selected_files.size());
  90     }
  91   } else {
  92     // Error allocating, need to free the resource IDs.
  93     for (size_t i = 0; i < selected_files.size(); i++)
  94       Module::Get()->core()->ReleaseResource(selected_files[i]);
  95   }
  96
  97   // Now execute the original callback.
  98   PP_RunCompletionCallback(&data->original_callback, result);
  99   delete data;
 100 }
 101
 102 }  // namespace pp