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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/screen_win.h"
#include <windows.h>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/hash.h"
#include "base/logging.h"
#include "base/strings/utf_string_conversions.h"
#include "base/win/win_util.h"
#include "ui/gfx/display.h"
#include "ui/gfx/win/dpi.h"
namespace {
MONITORINFOEX GetMonitorInfoForMonitor(HMONITOR monitor) {
MONITORINFOEX monitor_info;
ZeroMemory(&monitor_info, sizeof(MONITORINFOEX));
monitor_info.cbSize = sizeof(monitor_info);
GetMonitorInfo(monitor, &monitor_info);
return monitor_info;
}
gfx::Display GetDisplay(MONITORINFOEX& monitor_info) {
int64 id = static_cast<int64>(
base::Hash(base::WideToUTF8(monitor_info.szDevice)));
gfx::Rect bounds = gfx::Rect(monitor_info.rcMonitor);
gfx::Display display(id, bounds);
display.set_work_area(gfx::Rect(monitor_info.rcWork));
display.SetScaleAndBounds(gfx::GetDPIScale(), bounds);
DEVMODE mode;
memset(&mode, 0, sizeof(DEVMODE));
mode.dmSize = sizeof(DEVMODE);
mode.dmDriverExtra = 0;
if (EnumDisplaySettings(monitor_info.szDevice,
ENUM_CURRENT_SETTINGS,
&mode)) {
switch (mode.dmDisplayOrientation) {
case DMDO_DEFAULT:
display.set_rotation(gfx::Display::ROTATE_0);
break;
case DMDO_90:
display.set_rotation(gfx::Display::ROTATE_90);
break;
case DMDO_180:
display.set_rotation(gfx::Display::ROTATE_180);
break;
case DMDO_270:
display.set_rotation(gfx::Display::ROTATE_270);
break;
default:
NOTREACHED();
}
}
return display;
}
BOOL CALLBACK EnumMonitorCallback(HMONITOR monitor,
HDC hdc,
LPRECT rect,
LPARAM data) {
std::vector<gfx::Display>* all_displays =
reinterpret_cast<std::vector<gfx::Display>*>(data);
DCHECK(all_displays);
MONITORINFOEX monitor_info = GetMonitorInfoForMonitor(monitor);
gfx::Display display = GetDisplay(monitor_info);
all_displays->push_back(display);
return TRUE;
}
std::vector<gfx::Display> GetDisplays() {
std::vector<gfx::Display> displays;
EnumDisplayMonitors(NULL, NULL, EnumMonitorCallback,
reinterpret_cast<LPARAM>(&displays));
return displays;
}
} // namespace
namespace gfx {
ScreenWin::ScreenWin()
: displays_(GetDisplays()),
singleton_hwnd_observer_(new SingletonHwndObserver(
base::Bind(&ScreenWin::OnWndProc, base::Unretained(this)))) {}
ScreenWin::~ScreenWin() {}
gfx::Point ScreenWin::GetCursorScreenPoint() {
POINT pt;
GetCursorPos(&pt);
gfx::Point cursor_pos_pixels(pt);
return gfx::win::ScreenToDIPPoint(cursor_pos_pixels);
}
gfx::NativeWindow ScreenWin::GetWindowUnderCursor() {
POINT cursor_loc;
HWND hwnd = GetCursorPos(&cursor_loc) ? WindowFromPoint(cursor_loc) : NULL;
return GetNativeWindowFromHWND(hwnd);
}
gfx::NativeWindow ScreenWin::GetWindowAtScreenPoint(const gfx::Point& point) {
gfx::Point point_in_pixels = gfx::win::DIPToScreenPoint(point);
return GetNativeWindowFromHWND(WindowFromPoint(point_in_pixels.ToPOINT()));
}
int ScreenWin::GetNumDisplays() const {
return GetSystemMetrics(SM_CMONITORS);
}
std::vector<gfx::Display> ScreenWin::GetAllDisplays() const {
return displays_;
}
gfx::Display ScreenWin::GetDisplayNearestWindow(gfx::NativeView window) const {
HWND window_hwnd = GetHWNDFromNativeView(window);
if (!window_hwnd) {
// When |window| isn't rooted to a display, we should just return the
// default display so we get some correct display information like the
// scaling factor.
return GetPrimaryDisplay();
}
MONITORINFOEX monitor_info;
monitor_info.cbSize = sizeof(monitor_info);
GetMonitorInfo(MonitorFromWindow(window_hwnd, MONITOR_DEFAULTTONEAREST),
&monitor_info);
return GetDisplay(monitor_info);
}
gfx::Display ScreenWin::GetDisplayNearestPoint(const gfx::Point& point) const {
gfx::Point point_in_pixels = gfx::win::DIPToScreenPoint(point);
POINT initial_loc = { point_in_pixels.x(), point_in_pixels.y() };
HMONITOR monitor = MonitorFromPoint(initial_loc, MONITOR_DEFAULTTONEAREST);
MONITORINFOEX mi;
ZeroMemory(&mi, sizeof(MONITORINFOEX));
mi.cbSize = sizeof(mi);
if (monitor && GetMonitorInfo(monitor, &mi)) {
return GetDisplay(mi);
}
return gfx::Display();
}
gfx::Display ScreenWin::GetDisplayMatching(const gfx::Rect& match_rect) const {
RECT other_bounds_rect = match_rect.ToRECT();
MONITORINFOEX monitor_info = GetMonitorInfoForMonitor(MonitorFromRect(
&other_bounds_rect, MONITOR_DEFAULTTONEAREST));
return GetDisplay(monitor_info);
}
gfx::Display ScreenWin::GetPrimaryDisplay() const {
MONITORINFOEX mi = GetMonitorInfoForMonitor(
MonitorFromWindow(NULL, MONITOR_DEFAULTTOPRIMARY));
gfx::Display display = GetDisplay(mi);
// TODO(kevers|girard): Test if these checks can be reintroduced for high-DIP
// once more of the app is DIP-aware.
if (GetDPIScale() == 1.0) {
DCHECK_EQ(GetSystemMetrics(SM_CXSCREEN), display.size().width());
DCHECK_EQ(GetSystemMetrics(SM_CYSCREEN), display.size().height());
}
return display;
}
void ScreenWin::AddObserver(DisplayObserver* observer) {
change_notifier_.AddObserver(observer);
}
void ScreenWin::RemoveObserver(DisplayObserver* observer) {
change_notifier_.RemoveObserver(observer);
}
void ScreenWin::OnWndProc(HWND hwnd,
UINT message,
WPARAM wparam,
LPARAM lparam) {
if (message != WM_DISPLAYCHANGE)
return;
std::vector<gfx::Display> old_displays = displays_;
displays_ = GetDisplays();
change_notifier_.NotifyDisplaysChanged(old_displays, displays_);
}
HWND ScreenWin::GetHWNDFromNativeView(NativeView window) const {
NOTREACHED();
return NULL;
}
NativeWindow ScreenWin::GetNativeWindowFromHWND(HWND hwnd) const {
NOTREACHED();
return NULL;
}
} // namespace gfx
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