File: macglobalshortcutbackend.mm

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/* This file is part of Clementine.
   Copyright 2010, David Sansome <davidsansome@gmail.com>
   Copyright 2010-2011, 2014, John Maguire <john.maguire@gmail.com>

   Clementine is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   Clementine is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with Clementine.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "macglobalshortcutbackend.h"

#ifndef Q_MOC_RUN
#include <boost/noncopyable.hpp>
#endif

#include <AppKit/NSEvent.h>
#include <AppKit/NSWorkspace.h>
#include <ApplicationServices/ApplicationServices.h>
#include <Foundation/NSString.h>
#include <IOKit/hidsystem/ev_keymap.h>

#include <QAction>
#include <QList>
#include <QMessageBox>
#include <QPushButton>
#include <QtDebug>

#include "config.h"
#include "core/globalshortcuts.h"
#include "core/logging.h"
#include "core/mac_startup.h"
#include "core/utilities.h"

#import "core/mac_utilities.h"
#import "mac/SBSystemPreferences.h"

class MacGlobalShortcutBackendPrivate : boost::noncopyable {
 public:
  explicit MacGlobalShortcutBackendPrivate(MacGlobalShortcutBackend* backend)
      : global_monitor_(nil), local_monitor_(nil), backend_(backend) {}

  bool Register() {
    global_monitor_ = [NSEvent addGlobalMonitorForEventsMatchingMask:NSKeyDownMask
                                                             handler:^(NSEvent* event) {
                                                               HandleKeyEvent(event);
                                                             }];
    local_monitor_ =
        [NSEvent addLocalMonitorForEventsMatchingMask:NSKeyDownMask
                                              handler:^(NSEvent* event) {
                                                // Filter event if we handle
                                                // it as a global shortcut.
                                                return HandleKeyEvent(event) ? nil : event;
                                              }];
    return true;
  }

  void Unregister() {
    [NSEvent removeMonitor:global_monitor_];
    [NSEvent removeMonitor:local_monitor_];
  }

 private:
  bool HandleKeyEvent(NSEvent* event) {
    QKeySequence sequence = mac::KeySequenceFromNSEvent(event);
    return backend_->KeyPressed(sequence);
  }

  id global_monitor_;
  id local_monitor_;
  MacGlobalShortcutBackend* backend_;
};

MacGlobalShortcutBackend::MacGlobalShortcutBackend(GlobalShortcuts* parent)
    : GlobalShortcutBackend(parent), p_(new MacGlobalShortcutBackendPrivate(this)) {}

MacGlobalShortcutBackend::~MacGlobalShortcutBackend() {}

bool MacGlobalShortcutBackend::DoRegister() {
  // Always enable media keys.
  mac::SetShortcutHandler(this);

  for (const GlobalShortcuts::Shortcut& shortcut : manager_->shortcuts().values()) {
    shortcuts_[shortcut.action->shortcut()] = shortcut.action;
  }
  return p_->Register();
}

void MacGlobalShortcutBackend::DoUnregister() {
  p_->Unregister();
  shortcuts_.clear();
}

void MacGlobalShortcutBackend::MacMediaKeyPressed(int key) {
  switch (key) {
    case NX_KEYTYPE_PLAY:
      KeyPressed(Qt::Key_MediaPlay);
      break;
    case NX_KEYTYPE_FAST:
      KeyPressed(Qt::Key_MediaNext);
      break;
    case NX_KEYTYPE_REWIND:
      KeyPressed(Qt::Key_MediaPrevious);
      break;
  }
}

bool MacGlobalShortcutBackend::KeyPressed(const QKeySequence& sequence) {
  if (sequence.isEmpty()) {
    return false;
  }
  QAction* action = shortcuts_[sequence];
  if (action) {
    action->trigger();
    return true;
  }
  return false;
}

bool MacGlobalShortcutBackend::IsAccessibilityEnabled() const {
  bool accessibilityEnabled;
  try {
    accessibilityEnabled = AXAPIEnabled();
  } catch (...) {
    NSDictionary* options = @{(id)kAXTrustedCheckOptionPrompt : @YES};
    accessibilityEnabled = AXIsProcessTrustedWithOptions((CFDictionaryRef)options);
  }
  return accessibilityEnabled;
}

void MacGlobalShortcutBackend::ShowAccessibilityDialog() {
  NSArray* paths =
      NSSearchPathForDirectoriesInDomains(NSPreferencePanesDirectory, NSSystemDomainMask, YES);
  if ([paths count] == 1) {
    SBSystemPreferencesApplication* system_prefs =
        [SBApplication applicationWithBundleIdentifier:@"com.apple.systempreferences"];
    [system_prefs activate];

    SBElementArray* panes = [system_prefs panes];
    SBSystemPreferencesPane* security_pane = nil;
    for (SBSystemPreferencesPane* pane : panes) {
      if ([[pane id] isEqualToString:@"com.apple.preference.security"]) {
        security_pane = pane;
        break;
      }
    }
    [system_prefs setCurrentPane:security_pane];

    SBElementArray* anchors = [security_pane anchors];
    for (SBSystemPreferencesAnchor* anchor : anchors) {
      if ([[anchor name] isEqualToString:@"Privacy_Accessibility"]) {
        [anchor reveal];
      }
    }
  }
}