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 "ui/events/ozone/evdev/libgestures_glue/event_reader_libevdev_cros.h" 6 7 #include <errno.h> 8 #include <libevdev/libevdev.h> 9 #include <linux/input.h> 10 11 #include "base/message_loop/message_loop.h" 12 #include "base/strings/string_util.h" 13 #include "base/strings/stringprintf.h" 14 15 namespace ui { 16 17 namespace { 18 19 std::string FormatLog(const char* fmt, va_list args) { 20 std::string msg = base::StringPrintV(fmt, args); 21 if (!msg.empty() && msg[msg.size() - 1] == '\n') 22 msg.erase(msg.end() - 1, msg.end()); 23 return msg; 24 } 25 26 } // namespace 27 28 EventReaderLibevdevCros::EventReaderLibevdevCros(int fd, 29 const base::FilePath& path, 30 scoped_ptr<Delegate> delegate) 31 : EventConverterEvdev(fd, path), delegate_(delegate.Pass()) { 32 memset(&evdev_, 0, sizeof(evdev_)); 33 evdev_.log = OnLogMessage; 34 evdev_.log_udata = this; 35 evdev_.syn_report = OnSynReport; 36 evdev_.syn_report_udata = this; 37 evdev_.fd = fd; 38 39 memset(&evstate_, 0, sizeof(evstate_)); 40 evdev_.evstate = &evstate_; 41 Event_Init(&evdev_); 42 43 Event_Open(&evdev_); 44 45 delegate_->OnLibEvdevCrosOpen(&evdev_, &evstate_); 46 } 47 48 EventReaderLibevdevCros::~EventReaderLibevdevCros() { 49 Stop(); 50 EvdevClose(&evdev_); 51 } 52 53 EventReaderLibevdevCros::Delegate::~Delegate() {} 54 55 void EventReaderLibevdevCros::OnFileCanReadWithoutBlocking(int fd) { 56 if (EvdevRead(&evdev_)) { 57 if (errno == EINTR || errno == EAGAIN) 58 return; 59 if (errno != ENODEV) 60 PLOG(ERROR) << "error reading device " << path_.value(); 61 Stop(); 62 return; 63 } 64 } 65 66 // static 67 void EventReaderLibevdevCros::OnSynReport(void* data, 68 EventStateRec* evstate, 69 struct timeval* tv) { 70 EventReaderLibevdevCros* reader = static_cast<EventReaderLibevdevCros*>(data); 71 reader->delegate_->OnLibEvdevCrosEvent(&reader->evdev_, evstate, *tv); 72 } 73 74 // static 75 void EventReaderLibevdevCros::OnLogMessage(void* data, 76 int level, 77 const char* fmt, 78 ...) { 79 va_list args; 80 va_start(args, fmt); 81 if (level >= LOGLEVEL_ERROR) 82 LOG(ERROR) << "libevdev: " << FormatLog(fmt, args); 83 else if (level >= LOGLEVEL_WARNING) 84 LOG(WARNING) << "libevdev: " << FormatLog(fmt, args); 85 else 86 VLOG(3) << "libevdev: " << FormatLog(fmt, args); 87 va_end(args); 88 } 89 90 } // namespace ui 91
