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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/requirements_checker.h"
#include "base/bind.h"
#include "chrome/browser/gpu/gpu_feature_checker.h"
#include "chrome/grit/generated_resources.h"
#include "content/public/browser/browser_thread.h"
#include "extensions/common/extension.h"
#include "extensions/common/manifest.h"
#include "extensions/common/manifest_handlers/requirements_info.h"
#include "gpu/config/gpu_feature_type.h"
#include "ui/base/l10n/l10n_util.h"
#if defined(OS_WIN)
#include "base/win/metro.h"
#endif
namespace extensions {
RequirementsChecker::RequirementsChecker()
: pending_requirement_checks_(0) {
}
RequirementsChecker::~RequirementsChecker() {
}
void RequirementsChecker::Check(scoped_refptr<const Extension> extension,
base::Callback<void(std::vector<std::string> errors)> callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
callback_ = callback;
const RequirementsInfo& requirements =
RequirementsInfo::GetRequirements(extension.get());
if (requirements.npapi) {
#if defined(OS_POSIX) && !defined(OS_MACOSX)
errors_.push_back(
l10n_util::GetStringUTF8(IDS_EXTENSION_NPAPI_NOT_SUPPORTED));
#endif
#if defined(OS_WIN)
if (base::win::IsMetroProcess()) {
errors_.push_back(
l10n_util::GetStringUTF8(IDS_EXTENSION_NPAPI_NOT_SUPPORTED));
}
#endif
}
if (requirements.window_shape) {
#if !defined(USE_AURA)
errors_.push_back(
l10n_util::GetStringUTF8(IDS_EXTENSION_WINDOW_SHAPE_NOT_SUPPORTED));
#endif
}
if (requirements.webgl) {
++pending_requirement_checks_;
webgl_checker_ = new GPUFeatureChecker(
gpu::GPU_FEATURE_TYPE_WEBGL,
base::Bind(&RequirementsChecker::SetWebGLAvailability,
AsWeakPtr()));
}
if (pending_requirement_checks_ == 0) {
content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
base::Bind(callback_, errors_));
// Reset the callback so any ref-counted bound parameters will get released.
callback_.Reset();
return;
}
// Running the GPU checkers down here removes any race condition that arises
// from the use of pending_requirement_checks_.
if (webgl_checker_.get())
webgl_checker_->CheckGPUFeatureAvailability();
}
void RequirementsChecker::SetWebGLAvailability(bool available) {
if (!available) {
errors_.push_back(
l10n_util::GetStringUTF8(IDS_EXTENSION_WEBGL_NOT_SUPPORTED));
}
MaybeRunCallback();
}
void RequirementsChecker::MaybeRunCallback() {
if (--pending_requirement_checks_ == 0) {
content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
base::Bind(callback_, errors_));
// Reset the callback so any ref-counted bound parameters will get released.
callback_.Reset();
errors_.clear();
}
}
} // namespace extensions
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