chrome/browser/extensions/requirements_checker.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 "chrome/browser/extensions/requirements_checker.h"
   6
   7 #include "base/bind.h"
   8 #include "base/strings/utf_string_conversions.h"
   9 #include "chrome/browser/gpu/gpu_feature_checker.h"
  10 #include "content/public/browser/browser_thread.h"
  11 #include "extensions/common/extension.h"
  12 #include "extensions/common/manifest.h"
  13 #include "extensions/common/manifest_handlers/requirements_info.h"
  14 #include "gpu/config/gpu_feature_type.h"
  15 #include "grit/generated_resources.h"
  16 #include "ui/base/l10n/l10n_util.h"
  17
  18 #if defined(OS_WIN)
  19 #include "base/win/metro.h"
  20 #endif // defined(OS_WIN)
  21
  22 namespace extensions {
  23
  24 RequirementsChecker::RequirementsChecker()
  25     : pending_requirement_checks_(0) {
  26 }
  27
  28 RequirementsChecker::~RequirementsChecker() {
  29 }
  30
  31 void RequirementsChecker::Check(scoped_refptr<const Extension> extension,
  32     base::Callback<void(std::vector<std::string> errors)> callback) {
  33   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  34
  35   callback_ = callback;
  36   const RequirementsInfo& requirements =
  37       RequirementsInfo::GetRequirements(extension.get());
  38
  39   if (requirements.npapi) {
  40 #if defined(OS_CHROMEOS)
  41     errors_.push_back(
  42         l10n_util::GetStringUTF8(IDS_EXTENSION_NPAPI_NOT_SUPPORTED));
  43 #endif  // defined(OS_CHROMEOS)
  44 #if defined(OS_WIN)
  45     if (base::win::IsMetroProcess()) {
  46       errors_.push_back(
  47           l10n_util::GetStringUTF8(IDS_EXTENSION_NPAPI_NOT_SUPPORTED));
  48     }
  49 #endif  // defined(OS_WIN)
  50   }
  51
  52   if (requirements.webgl) {
  53     ++pending_requirement_checks_;
  54     webgl_checker_ = new GPUFeatureChecker(
  55       gpu::GPU_FEATURE_TYPE_WEBGL,
  56       base::Bind(&RequirementsChecker::SetWebGLAvailability,
  57                  AsWeakPtr()));
  58   }
  59
  60   if (requirements.css3d) {
  61     ++pending_requirement_checks_;
  62     css3d_checker_ = new GPUFeatureChecker(
  63       gpu::GPU_FEATURE_TYPE_ACCELERATED_COMPOSITING,
  64       base::Bind(&RequirementsChecker::SetCSS3DAvailability,
  65                  AsWeakPtr()));
  66   }
  67
  68   if (pending_requirement_checks_ == 0) {
  69     content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
  70                                      base::Bind(callback_, errors_));
  71     // Reset the callback so any ref-counted bound parameters will get released.
  72     callback_.Reset();
  73     return;
  74   }
  75   // Running the GPU checkers down here removes any race condition that arises
  76   // from the use of pending_requirement_checks_.
  77   if (webgl_checker_.get())
  78     webgl_checker_->CheckGPUFeatureAvailability();
  79   if (css3d_checker_.get())
  80     css3d_checker_->CheckGPUFeatureAvailability();
  81 }
  82
  83 void RequirementsChecker::SetWebGLAvailability(bool available) {
  84   if (!available) {
  85     errors_.push_back(
  86         l10n_util::GetStringUTF8(IDS_EXTENSION_WEBGL_NOT_SUPPORTED));
  87   }
  88   MaybeRunCallback();
  89 }
  90
  91 void RequirementsChecker::SetCSS3DAvailability(bool available) {
  92   if (!available) {
  93     errors_.push_back(
  94         l10n_util::GetStringUTF8(IDS_EXTENSION_CSS3D_NOT_SUPPORTED));
  95   }
  96   MaybeRunCallback();
  97 }
  98
  99 void RequirementsChecker::MaybeRunCallback() {
 100   if (--pending_requirement_checks_ == 0) {
 101     content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
 102                                      base::Bind(callback_, errors_));
 103     // Reset the callback so any ref-counted bound parameters will get released.
 104     callback_.Reset();
 105     errors_.clear();
 106   }
 107 }
 108
 109 }  // namespace extensions