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fix: window bounds not scaled from screen coordinates (#29162)

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This commit is contained in:
Samuel Maddock 2021-05-18 21:34:40 -04:00 committed by GitHub
parent 2806664bd0
commit d518b6abc8
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 30 additions and 20 deletions
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28
shell/browser/native_window_views.cc
View file

@ -82,6 +82,22 @@
namespace electron {
#if defined(OS_WIN)
// Similar to the ones in display::win::ScreenWin, but with rounded values
// These help to avoid problems that arise from unresizable windows where the
// original ceil()-ed values can cause calculation errors, since converting
// both ways goes through a ceil() call. Related issue: #15816
gfx::Rect ScreenToDIPRect(HWND hwnd, const gfx::Rect& pixel_bounds) {
float scale_factor = display::win::ScreenWin::GetScaleFactorForHWND(hwnd);
gfx::Rect dip_rect = ScaleToRoundedRect(pixel_bounds, 1.0f / scale_factor);
dip_rect.set_origin(
display::win::ScreenWin::ScreenToDIPRect(hwnd, pixel_bounds).origin());
return dip_rect;
}
#endif
namespace {
#if defined(OS_WIN)
@ -96,18 +112,6 @@ void FlipWindowStyle(HWND handle, bool on, DWORD flag) {
::SetWindowLong(handle, GWL_STYLE, style);
}
// Similar to the ones in display::win::ScreenWin, but with rounded values
// These help to avoid problems that arise from unresizable windows where the
// original ceil()-ed values can cause calculation errors, since converting
// both ways goes through a ceil() call. Related issue: #15816
gfx::Rect ScreenToDIPRect(HWND hwnd, const gfx::Rect& pixel_bounds) {
float scale_factor = display::win::ScreenWin::GetScaleFactorForHWND(hwnd);
gfx::Rect dip_rect = ScaleToRoundedRect(pixel_bounds, 1.0f / scale_factor);
dip_rect.set_origin(
display::win::ScreenWin::ScreenToDIPRect(hwnd, pixel_bounds).origin());
return dip_rect;
}
gfx::Rect DIPToScreenRect(HWND hwnd, const gfx::Rect& pixel_bounds) {
float scale_factor = display::win::ScreenWin::GetScaleFactorForHWND(hwnd);
gfx::Rect screen_rect = ScaleToRoundedRect(pixel_bounds, scale_factor);

4
shell/browser/native_window_views.h
View file

@ -35,6 +35,10 @@ class WindowStateWatcher;
class EventDisabler;
#endif
#if defined(OS_WIN)
gfx::Rect ScreenToDIPRect(HWND hwnd, const gfx::Rect& pixel_bounds);
#endif
class NativeWindowViews : public NativeWindow,
public views::WidgetObserver,
public ui::EventHandler {

18
shell/browser/native_window_views_win.cc
View file

@ -260,11 +260,12 @@ bool NativeWindowViews::PreHandleMSG(UINT message,
case WM_SIZING: {
is_resizing_ = true;
bool prevent_default = false;
NotifyWindowWillResize(gfx::Rect(*reinterpret_cast<RECT*>(l_param)),
&prevent_default);
gfx::Rect bounds = gfx::Rect(*reinterpret_cast<RECT*>(l_param));
HWND hwnd = GetAcceleratedWidget();
gfx::Rect dpi_bounds = ScreenToDIPRect(hwnd, bounds);
NotifyWindowWillResize(dpi_bounds, &prevent_default);
if (prevent_default) {
::GetWindowRect(GetAcceleratedWidget(),
reinterpret_cast<RECT*>(l_param));
::GetWindowRect(hwnd, reinterpret_cast<RECT*>(l_param));
return true; // Tells Windows that the Sizing is handled.
}
return false;
@ -288,11 +289,12 @@ bool NativeWindowViews::PreHandleMSG(UINT message,
case WM_MOVING: {
is_moving_ = true;
bool prevent_default = false;
NotifyWindowWillMove(gfx::Rect(*reinterpret_cast<RECT*>(l_param)),
&prevent_default);
gfx::Rect bounds = gfx::Rect(*reinterpret_cast<RECT*>(l_param));
HWND hwnd = GetAcceleratedWidget();
gfx::Rect dpi_bounds = ScreenToDIPRect(hwnd, bounds);
NotifyWindowWillMove(dpi_bounds, &prevent_default);
if (!movable_ || prevent_default) {
::GetWindowRect(GetAcceleratedWidget(),
reinterpret_cast<RECT*>(l_param));
::GetWindowRect(hwnd, reinterpret_cast<RECT*>(l_param));
return true; // Tells Windows that the Move is handled. If not true,
// frameless windows can be moved using
// -webkit-app-region: drag elements.