content/common/gamepad_param_traits.cc

   1 // Copyright 2014 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 "content/common/gamepad_param_traits.h"
   6
   7 #include "base/pickle.h"
   8 #include "base/strings/string16.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "ipc/ipc_message_utils.h"
  11 #include "third_party/WebKit/public/platform/WebGamepad.h"
  12
  13 using blink::WebGamepad;
  14
  15 namespace {
  16
  17 void LogWebUCharString(
  18     const blink::WebUChar web_string[],
  19     const size_t array_size,
  20     std::string* log) {
  21   base::string16 utf16;
  22   utf16.reserve(array_size);
  23   for (size_t i = 0; i < array_size && web_string[i]; ++i) {
  24     utf16[i] = web_string[i];
  25   }
  26   log->append(base::UTF16ToUTF8(utf16));
  27 }
  28
  29 }
  30
  31 namespace IPC {
  32
  33 void ParamTraits<WebGamepad>::Write(
  34     Message* m,
  35     const WebGamepad& p) {
  36   m->WriteData(reinterpret_cast<const char*>(&p), sizeof(WebGamepad));
  37 }
  38
  39 bool ParamTraits<WebGamepad>::Read(const Message* m,
  40                                    base::PickleIterator* iter,
  41                                    WebGamepad* p) {
  42   int length;
  43   const char* data;
  44   if (!iter->ReadData(&data, &length) || length != sizeof(WebGamepad))
  45     return false;
  46   memcpy(p, data, sizeof(WebGamepad));
  47
  48   return true;
  49 }
  50
  51 void ParamTraits<WebGamepad>::Log(
  52     const WebGamepad& p,
  53     std::string* l) {
  54   l->append("WebGamepad(");
  55   LogParam(p.connected, l);
  56   LogWebUCharString(p.id, WebGamepad::idLengthCap, l);
  57   l->append(",");
  58   LogWebUCharString(p.mapping, WebGamepad::mappingLengthCap, l);
  59   l->append(",");
  60   LogParam(p.timestamp, l);
  61   l->append(",");
  62   LogParam(p.axesLength, l);
  63   l->append(", [");
  64   for (size_t i = 0; i < arraysize(p.axes); ++i) {
  65     l->append(base::StringPrintf("%f%s", p.axes[i],
  66         i < (arraysize(p.axes) - 1) ? ", " : "], "));
  67   }
  68   LogParam(p.buttonsLength, l);
  69   l->append(", [");
  70   for (size_t i = 0; i < arraysize(p.buttons); ++i) {
  71     l->append(base::StringPrintf("(%u, %f)%s",
  72         p.buttons[i].pressed, p.buttons[i].value,
  73         i < (arraysize(p.buttons) - 1) ? ", " : "], "));
  74   }
  75   l->append(")");
  76 }
  77
  78 } // namespace IPC