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Side by Side Diff: Source/modules/webusb/USBController.cpp

Issue 1262163003: Add WebUSB bindings and client interface [part 1] (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: Handle null navigator.frame() without ASSERT Created 5 years, 4 months ago
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1 // Copyright 2015 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 "config.h"
6 #include "modules/webusb/USBController.h"
7
8 #include "platform/RuntimeEnabledFeatures.h"
9 #include "public/platform/modules/webusb/WebUSBClient.h"
10
11 namespace blink {
12
13 USBController::~USBController()
14 {
15 }
16
17 void USBController::provideTo(LocalFrame& frame, WebUSBClient* client)
18 {
19 ASSERT(RuntimeEnabledFeatures::webUSBEnabled());
20 USBController* controller = new USBController(frame, client);
21 WillBeHeapSupplement<LocalFrame>::provideTo(frame, supplementName(), adoptPt rWillBeNoop(controller));
22 }
23
24 USBController& USBController::from(LocalFrame& frame)
25 {
26 USBController* controller = static_cast<USBController*>(WillBeHeapSupplement <LocalFrame>::from(frame, supplementName()));
27 ASSERT(controller);
28 return *controller;
29 }
30
31 const char* USBController::supplementName()
32 {
33 return "USBController";
34 }
35
36 USBController::USBController(LocalFrame& frame, WebUSBClient* client)
37 : LocalFrameLifecycleObserver(&frame)
38 , m_client(client)
39 {
40 }
41
42 void USBController::willDetachFrameHost()
43 {
44 m_client = nullptr;
45 }
46
47 DEFINE_TRACE(USBController)
48 {
49 WillBeHeapSupplement<LocalFrame>::trace(visitor);
50 LocalFrameLifecycleObserver::trace(visitor);
51 }
52
53 } // namespace blink
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