src/mojo/services/native_viewport/native_viewport_win.cc

   1 // Copyright 2013 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 "mojo/services/native_viewport/native_viewport.h"
   6
   7 #include "ui/events/event.h"
   8 #include "ui/gfx/win/msg_util.h"
   9 #include "ui/gfx/win/window_impl.h"
  10
  11 namespace mojo {
  12 namespace services {
  13 namespace {
  14
  15 gfx::Rect GetWindowBoundsForClientBounds(DWORD style, DWORD ex_style,
  16                                          const gfx::Rect& bounds) {
  17   RECT wr;
  18   wr.left = bounds.x();
  19   wr.top = bounds.y();
  20   wr.right = bounds.x() + bounds.width();
  21   wr.bottom = bounds.y() + bounds.height();
  22   AdjustWindowRectEx(&wr, style, FALSE, ex_style);
  23
  24   // Make sure to keep the window onscreen, as AdjustWindowRectEx() may have
  25   // moved part of it offscreen.
  26   gfx::Rect window_bounds(wr.left, wr.top,
  27                           wr.right - wr.left, wr.bottom - wr.top);
  28   window_bounds.set_x(std::max(0, window_bounds.x()));
  29   window_bounds.set_y(std::max(0, window_bounds.y()));
  30   return window_bounds;
  31 }
  32
  33 }
  34
  35 class NativeViewportWin : public gfx::WindowImpl,
  36                           public NativeViewport {
  37  public:
  38   explicit NativeViewportWin(NativeViewportDelegate* delegate)
  39       : delegate_(delegate) {
  40   }
  41   virtual ~NativeViewportWin() {
  42     if (IsWindow(hwnd()))
  43       DestroyWindow(hwnd());
  44   }
  45
  46  private:
  47   // Overridden from NativeViewport:
  48   virtual void Init(const gfx::Rect& bounds) OVERRIDE {
  49     gfx::Rect window_bounds = GetWindowBoundsForClientBounds(
  50         WS_OVERLAPPEDWINDOW, window_ex_style(), bounds);
  51     gfx::WindowImpl::Init(NULL, window_bounds);
  52     SetWindowText(hwnd(), L"native_viewport::NativeViewportWin!");
  53   }
  54
  55   virtual void Show() OVERRIDE {
  56     ShowWindow(hwnd(), SW_SHOWNORMAL);
  57   }
  58
  59   virtual void Hide() OVERRIDE {
  60     ShowWindow(hwnd(), SW_HIDE);
  61   }
  62
  63   virtual void Close() OVERRIDE {
  64     DestroyWindow(hwnd());
  65   }
  66
  67   virtual gfx::Size GetSize() OVERRIDE {
  68     RECT cr;
  69     GetClientRect(hwnd(), &cr);
  70     return gfx::Size(cr.right - cr.left, cr.bottom - cr.top);
  71   }
  72
  73   virtual void SetBounds(const gfx::Rect& bounds) OVERRIDE {
  74     gfx::Rect window_bounds = GetWindowBoundsForClientBounds(
  75         GetWindowLong(hwnd(), GWL_STYLE),
  76         GetWindowLong(hwnd(), GWL_EXSTYLE),
  77         bounds);
  78     SetWindowPos(hwnd(), NULL, window_bounds.x(), window_bounds.y(),
  79                  window_bounds.width(), window_bounds.height(),
  80                  SWP_NOREPOSITION);
  81   }
  82
  83   virtual void SetCapture() OVERRIDE {
  84     DCHECK(::GetCapture() != hwnd());
  85     ::SetCapture(hwnd());
  86   }
  87
  88   virtual void ReleaseCapture() OVERRIDE {
  89     if (::GetCapture() == hwnd())
  90       ::ReleaseCapture();
  91   }
  92
  93   CR_BEGIN_MSG_MAP_EX(NativeViewportWin)
  94     CR_MESSAGE_RANGE_HANDLER_EX(WM_MOUSEFIRST, WM_MOUSELAST, OnMouseRange)
  95
  96     CR_MESSAGE_HANDLER_EX(WM_KEYDOWN, OnKeyEvent)
  97     CR_MESSAGE_HANDLER_EX(WM_KEYUP, OnKeyEvent)
  98     CR_MESSAGE_HANDLER_EX(WM_SYSKEYDOWN, OnKeyEvent)
  99     CR_MESSAGE_HANDLER_EX(WM_SYSKEYUP, OnKeyEvent)
 100     CR_MESSAGE_HANDLER_EX(WM_CHAR, OnKeyEvent)
 101     CR_MESSAGE_HANDLER_EX(WM_SYSCHAR, OnKeyEvent)
 102     CR_MESSAGE_HANDLER_EX(WM_IME_CHAR, OnKeyEvent)
 103
 104     CR_MSG_WM_CREATE(OnCreate)
 105     CR_MSG_WM_DESTROY(OnDestroy)
 106     CR_MSG_WM_PAINT(OnPaint)
 107     CR_MSG_WM_WINDOWPOSCHANGED(OnWindowPosChanged)
 108   CR_END_MSG_MAP()
 109
 110   LRESULT OnMouseRange(UINT message, WPARAM w_param, LPARAM l_param) {
 111     MSG msg = { hwnd(), message, w_param, l_param, 0,
 112                 { CR_GET_X_LPARAM(l_param), CR_GET_Y_LPARAM(l_param) } };
 113     ui::MouseEvent event(msg);
 114     SetMsgHandled(delegate_->OnEvent(&event));
 115     return 0;
 116   }
 117   LRESULT OnKeyEvent(UINT message, WPARAM w_param, LPARAM l_param) {
 118     MSG msg = { hwnd(), message, w_param, l_param };
 119     ui::KeyEvent event(msg, message == WM_CHAR);
 120     SetMsgHandled(delegate_->OnEvent(&event));
 121     return 0;
 122   }
 123   LRESULT OnCreate(CREATESTRUCT* create_struct) {
 124     delegate_->OnAcceleratedWidgetAvailable(hwnd());
 125     return 0;
 126   }
 127   void OnDestroy() {
 128     delegate_->OnDestroyed();
 129   }
 130   void OnPaint(HDC) {
 131     RECT cr;
 132     GetClientRect(hwnd(), &cr);
 133
 134     PAINTSTRUCT ps;
 135     HDC dc = BeginPaint(hwnd(), &ps);
 136     HBRUSH red_brush = CreateSolidBrush(RGB(255, 0, 0));
 137     HGDIOBJ old_object = SelectObject(dc, red_brush);
 138     Rectangle(dc, cr.left, cr.top, cr.right, cr.bottom);
 139     SelectObject(dc, old_object);
 140     DeleteObject(red_brush);
 141     EndPaint(hwnd(), &ps);
 142   }
 143   void OnWindowPosChanged(WINDOWPOS* window_pos) {
 144     if (!(window_pos->flags & SWP_NOSIZE) ||
 145         !(window_pos->flags & SWP_NOMOVE)) {
 146       RECT cr;
 147       GetClientRect(hwnd(), &cr);
 148       delegate_->OnBoundsChanged(
 149           gfx::Rect(window_pos->x, window_pos->y,
 150                     cr.right - cr.left, cr.bottom - cr.top));
 151     }
 152   }
 153
 154   NativeViewportDelegate* delegate_;
 155
 156   DISALLOW_COPY_AND_ASSIGN(NativeViewportWin);
 157 };
 158
 159 // static
 160 scoped_ptr<NativeViewport> NativeViewport::Create(
 161     shell::Context* context,
 162     NativeViewportDelegate* delegate) {
 163   return scoped_ptr<NativeViewport>(new NativeViewportWin(delegate)).Pass();
 164 }
 165
 166 }  // namespace services
 167 }  // namespace mojo