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(
  40     const Message* m,
  41     PickleIterator* iter,
  42     WebGamepad* p) {
  43   int length;
  44   const char* data;
  45   if (!iter->ReadData(&data, &length) || length != sizeof(WebGamepad))
  46     return false;
  47   memcpy(p, data, sizeof(WebGamepad));
  48
  49   return true;
  50 }
  51
  52 void ParamTraits<WebGamepad>::Log(
  53     const WebGamepad& p,
  54     std::string* l) {
  55   l->append("WebGamepad(");
  56   LogParam(p.connected, l);
  57   LogWebUCharString(p.id, WebGamepad::idLengthCap, l);
  58   l->append(",");
  59   LogWebUCharString(p.mapping, WebGamepad::mappingLengthCap, l);
  60   l->append(",");
  61   LogParam(p.timestamp, l);
  62   l->append(",");
  63   LogParam(p.axesLength, l);
  64   l->append(", [");
  65   for (size_t i = 0; i < arraysize(p.axes); ++i) {
  66     l->append(base::StringPrintf("%f%s", p.axes[i],
  67         i < (arraysize(p.axes) - 1) ? ", " : "], "));
  68   }
  69   LogParam(p.buttonsLength, l);
  70   l->append(", [");
  71   for (size_t i = 0; i < arraysize(p.buttons); ++i) {
  72     l->append(base::StringPrintf("(%u, %f)%s",
  73         p.buttons[i].pressed, p.buttons[i].value,
  74         i < (arraysize(p.buttons) - 1) ? ", " : "], "));
  75   }
  76   l->append(")");
  77 }
  78
  79 } // namespace IPC