src/ui/views/linux_ui/window_button_order_provider.cc

   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/views/window/window_button_order_provider.h"
   6
   7 #include "ui/views/linux_ui/linux_ui.h"
   8 #include "ui/views/linux_ui/window_button_order_observer.h"
   9
  10 namespace views {
  11
  12 namespace {
  13
  14 class WindowButtonOrderObserverDelegate : public WindowButtonOrderProvider,
  15                                           public WindowButtonOrderObserver {
  16  public:
  17   WindowButtonOrderObserverDelegate();
  18   ~WindowButtonOrderObserverDelegate() override;
  19
  20   // WindowButtonOrderObserver:
  21   void OnWindowButtonOrderingChange(
  22       const std::vector<views::FrameButton>& leading_buttons,
  23       const std::vector<views::FrameButton>& trailing_buttons) override;
  24
  25  private:
  26   DISALLOW_COPY_AND_ASSIGN(WindowButtonOrderObserverDelegate);
  27 };
  28
  29 ///////////////////////////////////////////////////////////////////////////////
  30 // WindowButtonOrderObserverDelegate, public:
  31
  32 WindowButtonOrderObserverDelegate::WindowButtonOrderObserverDelegate() {
  33   views::LinuxUI* ui = views::LinuxUI::instance();
  34   if (ui)
  35     ui->AddWindowButtonOrderObserver(this);
  36 }
  37
  38 WindowButtonOrderObserverDelegate::~WindowButtonOrderObserverDelegate() {
  39   views::LinuxUI* ui = views::LinuxUI::instance();
  40   if (ui)
  41     ui->RemoveWindowButtonOrderObserver(this);
  42 }
  43
  44 void WindowButtonOrderObserverDelegate::OnWindowButtonOrderingChange(
  45     const std::vector<views::FrameButton>& leading_buttons,
  46     const std::vector<views::FrameButton>& trailing_buttons) {
  47   SetWindowButtonOrder(leading_buttons, trailing_buttons);
  48 }
  49
  50 }  // namespace
  51
  52 // static
  53 WindowButtonOrderProvider* WindowButtonOrderProvider::instance_ = NULL;
  54
  55 ///////////////////////////////////////////////////////////////////////////////
  56 // WindowButtonOrderProvider, public:
  57
  58 // static
  59 WindowButtonOrderProvider* WindowButtonOrderProvider::GetInstance() {
  60   if (!instance_)
  61     instance_ = new WindowButtonOrderObserverDelegate;
  62   return instance_;
  63 }
  64
  65 ///////////////////////////////////////////////////////////////////////////////
  66 // WindowButtonOrderProvider, protected:
  67
  68 WindowButtonOrderProvider::WindowButtonOrderProvider() {
  69   trailing_buttons_.push_back(views::FRAME_BUTTON_MINIMIZE);
  70   trailing_buttons_.push_back(views::FRAME_BUTTON_MAXIMIZE);
  71   trailing_buttons_.push_back(views::FRAME_BUTTON_CLOSE);
  72 }
  73
  74 WindowButtonOrderProvider::~WindowButtonOrderProvider() {
  75 }
  76
  77 void WindowButtonOrderProvider::SetWindowButtonOrder(
  78     const std::vector<views::FrameButton>& leading_buttons,
  79     const std::vector<views::FrameButton>& trailing_buttons) {
  80   leading_buttons_ = leading_buttons;
  81   trailing_buttons_ = trailing_buttons;
  82 }
  83
  84 }  // namespace views