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notify_icon_host.cc
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notify_icon_host.cc
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// Copyright (c) 2014 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/browser/ui/win/notify_icon_host.h"
#include <commctrl.h>
#include <winuser.h>
#include "base/bind.h"
#include "base/stl_util.h"
#include "base/win/win_util.h"
#include "base/win/wrapped_window_proc.h"
#include "shell/browser/ui/win/notify_icon.h"
#include "ui/events/event_constants.h"
#include "ui/events/win/system_event_state_lookup.h"
#include "ui/gfx/win/hwnd_util.h"
namespace electron {
namespace {
const UINT kNotifyIconMessage = WM_APP + 1;
// |kBaseIconId| is 2 to avoid conflicts with plugins that hard-code id 1.
const UINT kBaseIconId = 2;
const wchar_t kNotifyIconHostWindowClass[] = L"Electron_NotifyIconHostWindow";
bool IsWinPressed() {
return ((::GetKeyState(VK_LWIN) & 0x8000) == 0x8000) ||
((::GetKeyState(VK_RWIN) & 0x8000) == 0x8000);
}
int GetKeyboardModifers() {
int modifiers = ui::EF_NONE;
if (ui::win::IsShiftPressed())
modifiers |= ui::EF_SHIFT_DOWN;
if (ui::win::IsCtrlPressed())
modifiers |= ui::EF_CONTROL_DOWN;
if (ui::win::IsAltPressed())
modifiers |= ui::EF_ALT_DOWN;
if (IsWinPressed())
modifiers |= ui::EF_COMMAND_DOWN;
return modifiers;
}
} // namespace
NotifyIconHost::NotifyIconHost() {
// Register our window class
WNDCLASSEX window_class;
base::win::InitializeWindowClass(
kNotifyIconHostWindowClass,
&base::win::WrappedWindowProc<NotifyIconHost::WndProcStatic>, 0, 0, 0,
NULL, NULL, NULL, NULL, NULL, &window_class);
instance_ = window_class.hInstance;
atom_ = RegisterClassEx(&window_class);
CHECK(atom_);
// If the taskbar is re-created after we start up, we have to rebuild all of
// our icons.
taskbar_created_message_ = RegisterWindowMessage(TEXT("TaskbarCreated"));
// Create an offscreen window for handling messages for the status icons. We
// create a hidden WS_POPUP window instead of an HWND_MESSAGE window, because
// only top-level windows such as popups can receive broadcast messages like
// "TaskbarCreated".
window_ = CreateWindow(MAKEINTATOM(atom_), 0, WS_POPUP, 0, 0, 0, 0, 0, 0,
instance_, 0);
gfx::CheckWindowCreated(window_);
gfx::SetWindowUserData(window_, this);
}
NotifyIconHost::~NotifyIconHost() {
if (window_)
DestroyWindow(window_);
if (atom_)
UnregisterClass(MAKEINTATOM(atom_), instance_);
for (NotifyIcon* ptr : notify_icons_)
delete ptr;
}
NotifyIcon* NotifyIconHost::CreateNotifyIcon() {
NotifyIcon* notify_icon =
new NotifyIcon(this, NextIconId(), window_, kNotifyIconMessage);
notify_icons_.push_back(notify_icon);
return notify_icon;
}
void NotifyIconHost::Remove(NotifyIcon* icon) {
NotifyIcons::iterator i(
std::find(notify_icons_.begin(), notify_icons_.end(), icon));
if (i == notify_icons_.end()) {
NOTREACHED();
return;
}
notify_icons_.erase(i);
}
LRESULT CALLBACK NotifyIconHost::WndProcStatic(HWND hwnd,
UINT message,
WPARAM wparam,
LPARAM lparam) {
NotifyIconHost* msg_wnd =
reinterpret_cast<NotifyIconHost*>(GetWindowLongPtr(hwnd, GWLP_USERDATA));
if (msg_wnd)
return msg_wnd->WndProc(hwnd, message, wparam, lparam);
else
return ::DefWindowProc(hwnd, message, wparam, lparam);
}
LRESULT CALLBACK NotifyIconHost::WndProc(HWND hwnd,
UINT message,
WPARAM wparam,
LPARAM lparam) {
if (message == taskbar_created_message_) {
// We need to reset all of our icons because the taskbar went away.
for (NotifyIcons::const_iterator i(notify_icons_.begin());
i != notify_icons_.end(); ++i) {
NotifyIcon* win_icon = static_cast<NotifyIcon*>(*i);
win_icon->ResetIcon();
}
return TRUE;
} else if (message == kNotifyIconMessage) {
NotifyIcon* win_icon = NULL;
// Find the selected status icon.
for (NotifyIcons::const_iterator i(notify_icons_.begin());
i != notify_icons_.end(); ++i) {
NotifyIcon* current_win_icon = static_cast<NotifyIcon*>(*i);
if (current_win_icon->icon_id() == wparam) {
win_icon = current_win_icon;
break;
}
}
// It is possible for this procedure to be called with an obsolete icon
// id. In that case we should just return early before handling any
// actions.
if (!win_icon)
return TRUE;
switch (lparam) {
case NIN_BALLOONSHOW:
win_icon->NotifyBalloonShow();
return TRUE;
case NIN_BALLOONUSERCLICK:
win_icon->NotifyBalloonClicked();
return TRUE;
case NIN_BALLOONTIMEOUT:
win_icon->NotifyBalloonClosed();
return TRUE;
case WM_LBUTTONDOWN:
case WM_RBUTTONDOWN:
case WM_LBUTTONDBLCLK:
case WM_RBUTTONDBLCLK:
case WM_CONTEXTMENU:
// Walk our icons, find which one was clicked on, and invoke its
// HandleClickEvent() method.
win_icon->HandleClickEvent(
GetKeyboardModifers(),
(lparam == WM_LBUTTONDOWN || lparam == WM_LBUTTONDBLCLK),
(lparam == WM_LBUTTONDBLCLK || lparam == WM_RBUTTONDBLCLK));
return TRUE;
case WM_MOUSEMOVE:
win_icon->HandleMouseMoveEvent(GetKeyboardModifers());
return TRUE;
}
}
return ::DefWindowProc(hwnd, message, wparam, lparam);
}
UINT NotifyIconHost::NextIconId() {
UINT icon_id = next_icon_id_++;
return kBaseIconId + icon_id;
}
} // namespace electron