Struct xpcom::interfaces::nsIScreen

#[repr(C)]
pub struct nsIScreen { /* fields omitted */ }

interface nsIScreen : nsISupports

Methods

impl nsIScreen

pub fn coerce<T: nsIScreenCoerce>(&self) -> &T

Cast this nsIScreen to one of its base interfaces.

impl nsIScreen

pub unsafe fn GetRect(
    &self,
    left: *mut int32_t,
    top: *mut int32_t,
    width: *mut int32_t,
    height: *mut int32_t
) -> nsresult

/**
   * These report screen dimensions in (screen-specific) device pixels
   */

void GetRect (out long left, out long top, out long width, out long height);

pub unsafe fn GetAvailRect(
    &self,
    left: *mut int32_t,
    top: *mut int32_t,
    width: *mut int32_t,
    height: *mut int32_t
) -> nsresult

void GetAvailRect (out long left, out long top, out long width, out long height);

pub unsafe fn GetRectDisplayPix(
    &self,
    left: *mut int32_t,
    top: *mut int32_t,
    width: *mut int32_t,
    height: *mut int32_t
) -> nsresult

/**
   * And these report in desktop pixels
   */

void GetRectDisplayPix (out long left, out long top, out long width, out long height);

pub unsafe fn GetAvailRectDisplayPix(
    &self,
    left: *mut int32_t,
    top: *mut int32_t,
    width: *mut int32_t,
    height: *mut int32_t
) -> nsresult

void GetAvailRectDisplayPix (out long left, out long top, out long width, out long height);

pub unsafe fn GetPixelDepth(&self, aPixelDepth: *mut int32_t) -> nsresult

readonly attribute long pixelDepth;

pub unsafe fn GetColorDepth(&self, aColorDepth: *mut int32_t) -> nsresult

readonly attribute long colorDepth;

pub unsafe fn GetContentsScaleFactor(
    &self,
    aContentsScaleFactor: *mut c_double
) -> nsresult

/**
   * The number of device pixels per desktop pixel for this screen (for
   * hidpi configurations where there may be multiple device pixels per
   * desktop px and/or per CSS px).
   *
   * This seems poorly named (something like devicePixelsPerDesktopPixel
   * would be more accurate/explicit), but given that it is exposed to
   * front-end code and may also be used by add-ons, it's probably not
   * worth the disruption of changing it.
   *
   * Returns 1.0 if HiDPI mode is disabled or unsupported, or if the
   * host OS uses device pixels as its desktop pixel units (e.g. Windows 7 or
   * GTK/X11). Per-monitor DPI is available in Windows 8.1+, GTK/Wayland or
   * macOS.
   */

readonly attribute double contentsScaleFactor;

pub unsafe fn GetDefaultCSSScaleFactor(
    &self,
    aDefaultCSSScaleFactor: *mut c_double
) -> nsresult

/**
   * The default number of device pixels per unscaled CSS pixel for this
   * screen. This is probably what contentsScaleFactor originally meant
   * to be, prior to confusion between CSS pixels and desktop pixel units.
   */

readonly attribute double defaultCSSScaleFactor;

pub unsafe fn GetDpi(&self, aDpi: *mut c_float) -> nsresult

/**
   * The DPI of the screen.
   */

readonly attribute float dpi;

Methods from Deref<Target = nsISupports>

pub fn coerce<T: nsISupportsCoerce>(&self) -> &T

Cast this nsISupports to one of its base interfaces.

pub unsafe fn QueryInterface(
    &self,
    uuid: &nsIID,
    result: *mut *mut c_void
) -> nsresult

void QueryInterface (in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result);

pub unsafe fn AddRef(&self) -> nsrefcnt

[noscript,notxpcom] nsrefcnt AddRef ();

pub unsafe fn Release(&self) -> nsrefcnt

[noscript,notxpcom] nsrefcnt Release ();

Trait Implementations

impl XpCom for nsIScreen

const IID: nsIID

IID: nsIID = nsID(2188280008, 55055, 17122, [138, 169, 130, 192, 95, 42, 55, 10])

fn query_interface<T: XpCom>(&self) -> Option<RefPtr<T>>

Perform a QueryInterface call on this object, attempting to dynamically cast it to the requested interface type. Returns Some(RefPtr) if the cast succeeded, and None otherwise.

impl RefCounted for nsIScreen

unsafe fn addref(&self)

Increment the reference count.

unsafe fn release(&self)

Decrement the reference count, potentially freeing backing memory.

impl Deref for nsIScreen

type Target = nsISupports

The resulting type after dereferencing.

fn deref(&self) -> &nsISupports

Dereferences the value.