use std::ffi::{c_uint, c_void}; use ::util::ResultExt;use windows::Win32::UI::{    Shell::{SHAppBarMessage, ABM_GETSTATE, ABM_GETTASKBARPOS, ABS_AUTOHIDE, APPBARDATA},    WindowsAndMessaging::{        SystemParametersInfoW, SPI_GETWHEELSCROLLCHARS, SPI_GETWHEELSCROLLLINES,        SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS,    },}; use crate::*; use super::WindowsDisplay; /// Windows settings pulled from SystemParametersInfo/// https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-systemparametersinfow#[derive(Default, Debug, Clone, Copy)]pub(crate) struct WindowsSystemSettings {    pub(crate) mouse_wheel_settings: MouseWheelSettings,    pub(crate) auto_hide_taskbar_position: Option<AutoHideTaskbarPosition>,} #[derive(Default, Debug, Clone, Copy)]pub(crate) struct MouseWheelSettings {    /// SEE: SPI_GETWHEELSCROLLCHARS    pub(crate) wheel_scroll_chars: u32,    /// SEE: SPI_GETWHEELSCROLLLINES    pub(crate) wheel_scroll_lines: u32,} impl WindowsSystemSettings {    pub(crate) fn new(display: WindowsDisplay) -> Self {        let mut settings = Self::default();        settings.update(display);        settings    }     pub(crate) fn update(&mut self, display: WindowsDisplay) {        self.mouse_wheel_settings.update();        self.auto_hide_taskbar_position = AutoHideTaskbarPosition::new(display).log_err().flatten();    }} impl MouseWheelSettings {    fn update(&mut self) {        self.update_wheel_scroll_chars();        self.update_wheel_scroll_lines();    }     fn update_wheel_scroll_chars(&mut self) {        let mut value = c_uint::default();        let result = unsafe {            SystemParametersInfoW(                SPI_GETWHEELSCROLLCHARS,                0,                Some((&mut value) as *mut c_uint as *mut c_void),                SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS::default(),            )        };         if result.log_err() != None && self.wheel_scroll_chars != value {            self.wheel_scroll_chars = value;        }    }     fn update_wheel_scroll_lines(&mut self) {        let mut value = c_uint::default();        let result = unsafe {            SystemParametersInfoW(                SPI_GETWHEELSCROLLLINES,                0,                Some((&mut value) as *mut c_uint as *mut c_void),                SYSTEM_PARAMETERS_INFO_UPDATE_FLAGS::default(),            )        };         if result.log_err() != None && self.wheel_scroll_lines != value {            self.wheel_scroll_lines = value;        }    }} #[derive(Debug, Clone, Copy, Default)]pub(crate) enum AutoHideTaskbarPosition {    Left,    Right,    Top,    #[default]    Bottom,} impl AutoHideTaskbarPosition {    fn new(display: WindowsDisplay) -> anyhow::Result<Option<Self>> {        if !check_auto_hide_taskbar_enable() {            // If auto hide taskbar is not enable, we do nothing in this case.            return Ok(None);        }        let mut info = APPBARDATA {            cbSize: std::mem::size_of::<APPBARDATA>() as u32,            ..Default::default()        };        let ret = unsafe { SHAppBarMessage(ABM_GETTASKBARPOS, &mut info) };        if ret == 0 {            anyhow::bail!(                "Unable to retrieve taskbar position: {}",                std::io::Error::last_os_error()            );        }        let taskbar_bounds: Bounds<DevicePixels> = Bounds::new(            point(info.rc.left.into(), info.rc.top.into()),            size(                (info.rc.right - info.rc.left).into(),                (info.rc.bottom - info.rc.top).into(),            ),        );        let display_bounds = display.physical_bounds();        if display_bounds.intersect(&taskbar_bounds) != taskbar_bounds {            // This case indicates that taskbar is not on the current monitor.            return Ok(None);        }        if taskbar_bounds.bottom() == display_bounds.bottom()            && taskbar_bounds.right() == display_bounds.right()        {            if taskbar_bounds.size.height < display_bounds.size.height                && taskbar_bounds.size.width == display_bounds.size.width            {                return Ok(Some(Self::Bottom));            }            if taskbar_bounds.size.width < display_bounds.size.width                && taskbar_bounds.size.height == display_bounds.size.height            {                return Ok(Some(Self::Right));            }            log::error!(                "Unrecognized taskbar bounds {:?} give display bounds {:?}",                taskbar_bounds,                display_bounds            );            return Ok(None);        }        if taskbar_bounds.top() == display_bounds.top()            && taskbar_bounds.left() == display_bounds.left()        {            if taskbar_bounds.size.height < display_bounds.size.height                && taskbar_bounds.size.width == display_bounds.size.width            {                return Ok(Some(Self::Top));            }            if taskbar_bounds.size.width < display_bounds.size.width                && taskbar_bounds.size.height == display_bounds.size.height            {                return Ok(Some(Self::Left));            }            log::error!(                "Unrecognized taskbar bounds {:?} give display bounds {:?}",                taskbar_bounds,                display_bounds            );            return Ok(None);        }        log::error!(            "Unrecognized taskbar bounds {:?} give display bounds {:?}",            taskbar_bounds,            display_bounds        );        Ok(None)    }} /// Check if auto hide taskbar is enable or not.fn check_auto_hide_taskbar_enable() -> bool {    let mut info = APPBARDATA {        cbSize: std::mem::size_of::<APPBARDATA>() as u32,        ..Default::default()    };    let ret = unsafe { SHAppBarMessage(ABM_GETSTATE, &mut info) } as u32;    ret == ABS_AUTOHIDE}