PowerToys/src/modules/fancyzones/lib/Zone.cpp
Ivan Stošić 629ba763d7
Basic support for snapping to multiple zones (#1955)
* Refactor a method which resizes windows

* Completed initial work for MultiZones

Without changing any test, they all pass!

* Implemented a basic version of Multizones, updated some tests

* Reduced the sensitivity radius

* Added a few must-have unit tests for Multizones

* Some fixups

* Took care of the conflict between this and #1938

* Improved how zones are detected, reverted a change in one unit test

* Resolved another merge conflict

* Fixed bugs related to stamping
2020-04-10 16:09:08 +02:00

134 lines
4.3 KiB
C++

#include "pch.h"
#include <common/dpi_aware.h>
#include <common/monitors.h>
#include "Zone.h"
#include "Settings.h"
#include "util.h"
struct Zone : winrt::implements<Zone, IZone>
{
public:
Zone(RECT zoneRect) :
m_zoneRect(zoneRect)
{
}
IFACEMETHODIMP_(RECT) GetZoneRect() noexcept { return m_zoneRect; }
IFACEMETHODIMP_(bool) IsEmpty() noexcept { return m_windows.empty(); };
IFACEMETHODIMP_(bool) ContainsWindow(HWND window) noexcept;
IFACEMETHODIMP_(void) AddWindowToZone(HWND window, HWND zoneWindow, bool stampZone) noexcept;
IFACEMETHODIMP_(void) RemoveWindowFromZone(HWND window, bool restoreSize) noexcept;
IFACEMETHODIMP_(void) SetId(size_t id) noexcept { m_id = id; }
IFACEMETHODIMP_(size_t) Id() noexcept { return m_id; }
IFACEMETHODIMP_(RECT) ComputeActualZoneRect(HWND window, HWND zoneWindow) noexcept;
private:
void SizeWindowToZone(HWND window, HWND zoneWindow) noexcept;
void StampZone(HWND window, bool stamp) noexcept;
RECT m_zoneRect{};
size_t m_id{};
std::map<HWND, RECT> m_windows{};
};
IFACEMETHODIMP_(bool) Zone::ContainsWindow(HWND window) noexcept
{
return (m_windows.find(window) != m_windows.end());
}
IFACEMETHODIMP_(void) Zone::AddWindowToZone(HWND window, HWND zoneWindow, bool stampZone) noexcept
{
WINDOWPLACEMENT placement;
::GetWindowPlacement(window, &placement);
::GetWindowRect(window, &placement.rcNormalPosition);
m_windows.emplace(std::pair<HWND, RECT>(window, placement.rcNormalPosition));
SizeWindowToZone(window, zoneWindow);
if (stampZone)
{
StampZone(window, true);
}
}
IFACEMETHODIMP_(void) Zone::RemoveWindowFromZone(HWND window, bool restoreSize) noexcept
{
auto iter = m_windows.find(window);
if (iter != m_windows.end())
{
m_windows.erase(iter);
StampZone(window, false);
}
}
void Zone::SizeWindowToZone(HWND window, HWND zoneWindow) noexcept
{
SizeWindowToRect(window, ComputeActualZoneRect(window, zoneWindow));
}
RECT Zone::ComputeActualZoneRect(HWND window, HWND zoneWindow) noexcept
{
// Take care of 1px border
RECT newWindowRect = m_zoneRect;
RECT windowRect{};
::GetWindowRect(window, &windowRect);
RECT frameRect{};
const auto level = DPIAware::GetAwarenessLevel(GetWindowDpiAwarenessContext(window));
const bool accountForUnawareness = level < DPIAware::PER_MONITOR_AWARE;
if (SUCCEEDED(DwmGetWindowAttribute(window, DWMWA_EXTENDED_FRAME_BOUNDS, &frameRect, sizeof(frameRect))))
{
const auto left_margin = frameRect.left - windowRect.left;
const auto right_margin = frameRect.right - windowRect.right;
const auto bottom_margin = frameRect.bottom - windowRect.bottom;
newWindowRect.left -= left_margin;
newWindowRect.right -= right_margin;
newWindowRect.bottom -= bottom_margin;
}
// Map to screen coords
MapWindowRect(zoneWindow, nullptr, &newWindowRect);
MONITORINFO mi{ sizeof(mi) };
if (GetMonitorInfoW(MonitorFromWindow(zoneWindow, MONITOR_DEFAULTTONEAREST), &mi))
{
const auto taskbar_left_size = std::abs(mi.rcMonitor.left - mi.rcWork.left);
const auto taskbar_top_size = std::abs(mi.rcMonitor.top - mi.rcWork.top);
OffsetRect(&newWindowRect, -taskbar_left_size, -taskbar_top_size);
if (accountForUnawareness)
{
newWindowRect.left = max(mi.rcMonitor.left, newWindowRect.left);
newWindowRect.right = min(mi.rcMonitor.right - taskbar_left_size, newWindowRect.right);
newWindowRect.top = max(mi.rcMonitor.top, newWindowRect.top);
newWindowRect.bottom = min(mi.rcMonitor.bottom - taskbar_top_size, newWindowRect.bottom);
}
}
if ((::GetWindowLong(window, GWL_STYLE) & WS_SIZEBOX) == 0)
{
newWindowRect.right = newWindowRect.left + (windowRect.right - windowRect.left);
newWindowRect.bottom = newWindowRect.top + (windowRect.bottom - windowRect.top);
}
return newWindowRect;
}
void Zone::StampZone(HWND window, bool stamp) noexcept
{
if (stamp)
{
SetProp(window, ZONE_STAMP, reinterpret_cast<HANDLE>(m_id));
}
else
{
RemoveProp(window, ZONE_STAMP);
}
}
winrt::com_ptr<IZone> MakeZone(const RECT& zoneRect) noexcept
{
return winrt::make_self<Zone>(zoneRect);
}