firefox-main/widget/nsIWidget.h (file symbol)

Source code

Revision control

Copy as Markdown

Other Tools

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsIWidget_h_
#define nsIWidget_h_
#include <cmath>
#include <cstdint>
#include "imgIContainer.h"
#include "ErrorList.h"
#include "Units.h"
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/Assertions.h"
#include "mozilla/Attributes.h"
#include "mozilla/EventForwards.h"
#include "mozilla/Maybe.h"
#include "mozilla/RefPtr.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/gfx/Matrix.h"
#include "mozilla/gfx/Rect.h"
#include "mozilla/layers/LayersTypes.h"
#include "mozilla/layers/ScrollableLayerGuid.h"
#include "mozilla/layers/ZoomConstraints.h"
#include "mozilla/image/Resolution.h"
#include "mozilla/widget/IMEData.h"
#include "nsCOMPtr.h"
#include "nsColor.h"
#include "nsDebug.h"
#include "nsID.h"
#include "nsIDOMWindowUtils.h"
#include "nsISupports.h"
#include "nsITheme.h"
#include "nsITimer.h"
#include "nsIWidgetListener.h"
#include "nsRect.h"
#include "nsSize.h"
#include "nsStringFwd.h"
#include "nsTArray.h"
#include "nsTHashMap.h"
#include "nsWeakReference.h"
#include "mozilla/widget/InitData.h"
#include "nsXULAppAPI.h"
// Windows specific constant indicating the maximum number of touch points the
// inject api will allow. This also sets the maximum numerical value for touch
// ids we can use when injecting touch points on Windows.
#define TOUCH_INJECT_MAX_POINTS 256
// forward declarations
class nsIBidiKeyboard;
class nsIRollupListener;
class nsIContent;
class nsMenuPopupFrame;
class nsIRunnable;
class nsIWidget;
namespace mozilla {
class CompositorVsyncDispatcher;
class FallbackRenderer;
class LiveResizeListener;
class PanGestureInput;
class MultiTouchInput;
class Mutex;
class PinchGestureInput;
class SwipeTracker;
class VsyncDispatcher;
class WidgetGUIEvent;
class WidgetInputEvent;
class WidgetKeyboardEvent;
enum ScreenRotation : uint8_t;
enum class ColorScheme : uint8_t;
enum class NativeKeyBindingsType : uint8_t;
enum class WindowButtonType : uint8_t;
struct FontRange;
struct SwipeEventQueue;
enum class HapticFeedbackType : uint8_t {
ShortPress = 0,
LongPress = 1,
TextHandleMove = 2,
End, // Not a feedback type, only to mark the upper boundary
};
enum class WindowShadow : uint8_t {
None,
Menu,
Panel,
Tooltip,
};
namespace dom {
class BrowserChild;
enum class CallerType : uint32_t;
} // namespace dom
class WindowRenderer;
namespace gfx {
class DrawTarget;
class SourceSurface;
} // namespace gfx
namespace layers {
class APZEventState;
class AsyncDragMetrics;
class Compositor;
class CompositorBridgeChild;
class CompositorBridgeParent;
class CompositorOptions;
class CompositorSession;
class GeckoContentController;
class IAPZCTreeManager;
class ImageContainer;
class LayerManager;
class NativeLayer;
class NativeLayerRoot;
class RemoteCompositorSession;
class WebRenderBridgeChild;
class WebRenderLayerManager;
struct APZEventResult;
struct CompositorScrollUpdate;
struct FrameMetrics;
struct ScrollableLayerGuid;
} // namespace layers
namespace widget {
enum class ThemeChangeKind : uint8_t;
enum class OcclusionState : uint8_t;
class TextEventDispatcher;
class TextEventDispatcherListener;
class LocalesChangedObserver;
class WidgetShutdownObserver;
class CompositorWidget;
class CompositorWidgetInitData;
class CompositorWidgetDelegate;
class InProcessCompositorWidget;
class WidgetRenderingContext;
class Screen;
} // namespace widget
namespace wr {
class DisplayListBuilder;
class IpcResourceUpdateQueue;
enum class RenderRoot : uint8_t;
} // namespace wr
#ifdef ACCESSIBILITY
namespace a11y {
class LocalAccessible;
}
#endif
} // namespace mozilla
/**
* Callback function that processes events.
*
* The argument is actually a subtype (subclass) of WidgetEvent which carries
* platform specific information about the event. Platform specific code
* knows how to deal with it.
*
* The return value determines whether or not the default action should take
* place.
*/
typedef nsEventStatus (*EVENT_CALLBACK)(mozilla::WidgetGUIEvent* aEvent);
// Hide the native window system's real window type so as to avoid
// including native window system types and APIs. This is necessary
// to ensure cross-platform code.
typedef void* nsNativeWidget;
/*
* TouchPointerState states for SynthesizeNativeTouchPoint. Match
* touch states in nsIDOMWindowUtils.idl.
*/
enum TouchPointerState : uint8_t {
// The pointer is in a hover state above the digitizer
TOUCH_HOVER = (1 << 0),
// The pointer is in contact with the digitizer
TOUCH_CONTACT = (1 << 1),
// The pointer has been removed from the digitizer detection area
TOUCH_REMOVE = (1 << 2),
// The pointer has been canceled. Will cancel any pending os level
// gestures that would triggered as a result of completion of the
// input sequence. This may not cancel moz platform related events
// that might get tirggered by input already delivered.
TOUCH_CANCEL = (1 << 3),
// ALL_BITS used for validity checking during IPC serialization
ALL_BITS = (1 << 4) - 1
};
/**
* Values for the GetNativeData function
*/
#define NS_NATIVE_WINDOW 0
#define NS_NATIVE_GRAPHIC 1
#define NS_NATIVE_WIDGET 3
#define NS_NATIVE_REGION 5
#define NS_NATIVE_OFFSETX 6
#define NS_NATIVE_OFFSETY 7
#define NS_NATIVE_SCREEN 9
// The toplevel GtkWidget containing this nsIWidget:
#define NS_NATIVE_SHELLWIDGET 10
#define NS_NATIVE_OPENGL_CONTEXT 12
// This is available only with GetNativeData() in parent process. Anybody
// shouldn't access this pointer as a valid pointer since the result may be
// special value like NS_ONLY_ONE_NATIVE_IME_CONTEXT. So, the result is just
// an identifier of distinguishing a text composition is caused by which native
// IME context. Note that the result is only valid in the process. So,
// XP code should use nsIWidget::GetNativeIMEContext() instead of using this.
#define NS_RAW_NATIVE_IME_CONTEXT 14
#define NS_NATIVE_WINDOW_WEBRTC_DEVICE_ID 15
#ifdef XP_WIN
# define NS_NATIVE_ICOREWINDOW 103 // winrt specific
#endif
#if defined(MOZ_WIDGET_GTK)
# define NS_NATIVE_EGL_WINDOW 106
#endif
#ifdef MOZ_WIDGET_ANDROID
# define NS_JAVA_SURFACE 100
#endif
#define MOZ_WIDGET_MAX_SIZE 16384
#define MOZ_WIDGET_INVALID_SCALE 0.0
// Must be kept in sync with xpcom/rust/xpcom/src/interfaces/nonidl.rs
#define NS_IWIDGET_IID \
{0x06396bf6, 0x2dd8, 0x45e5, {0xac, 0x45, 0x75, 0x26, 0x53, 0xb1, 0xc9, 0x80}}
/**
* Cursor types.
*/
enum nsCursor { ///(normal cursor, usually rendered as an arrow)
eCursor_standard,
///(system is busy, usually rendered as a hourglass or watch)
eCursor_wait,
///(Selecting something, usually rendered as an IBeam)
eCursor_select,
///(can hyper-link, usually rendered as a human hand)
eCursor_hyperlink,
///(north/south/west/east edge sizing)
eCursor_n_resize,
eCursor_s_resize,
eCursor_w_resize,
eCursor_e_resize,
///(corner sizing)
eCursor_nw_resize,
eCursor_se_resize,
eCursor_ne_resize,
eCursor_sw_resize,
eCursor_crosshair,
eCursor_move,
eCursor_help,
eCursor_copy, // CSS3
eCursor_alias,
eCursor_context_menu,
eCursor_cell,
eCursor_grab,
eCursor_grabbing,
eCursor_spinning,
eCursor_zoom_in,
eCursor_zoom_out,
eCursor_not_allowed,
eCursor_col_resize,
eCursor_row_resize,
eCursor_no_drop,
eCursor_vertical_text,
eCursor_all_scroll,
eCursor_nesw_resize,
eCursor_nwse_resize,
eCursor_ns_resize,
eCursor_ew_resize,
eCursor_none,
// This one is used for array sizing, and so better be the last
// one in this list...
eCursorCount,
// ...except for this one.
eCursorInvalid = eCursorCount + 1
};
/**
* Before the OS goes to sleep, this topic is notified.
*/
#define NS_WIDGET_SLEEP_OBSERVER_TOPIC "sleep_notification"
/**
* After the OS wakes up, this topic is notified.
*/
#define NS_WIDGET_WAKE_OBSERVER_TOPIC "wake_notification"
/**
* Before the OS suspends the current process, this topic is notified. Some
* OS will kill processes that are suspended instead of resuming them.
* For that reason this topic may be useful to safely close down resources.
*/
#define NS_WIDGET_SUSPEND_PROCESS_OBSERVER_TOPIC "suspend_process_notification"
/**
* After the current process resumes from being suspended, this topic is
* notified.
*/
#define NS_WIDGET_RESUME_PROCESS_OBSERVER_TOPIC "resume_process_notification"
/**
* When an app(-shell) is activated by the OS, this topic is notified.
* Currently, this only happens on Mac OSX.
*/
#define NS_WIDGET_MAC_APP_ACTIVATE_OBSERVER_TOPIC "mac_app_activate"
namespace mozilla::widget {
/**
* Size constraints for setting the minimum and maximum size of a widget.
* Values are in device pixels.
*/
struct SizeConstraints {
SizeConstraints()
: mMaxSize(MOZ_WIDGET_MAX_SIZE, MOZ_WIDGET_MAX_SIZE),
mScale(MOZ_WIDGET_INVALID_SCALE) {}
SizeConstraints(mozilla::LayoutDeviceIntSize aMinSize,
mozilla::LayoutDeviceIntSize aMaxSize,
mozilla::DesktopToLayoutDeviceScale aScale)
: mMinSize(aMinSize), mMaxSize(aMaxSize), mScale(aScale) {
if (mMaxSize.width > MOZ_WIDGET_MAX_SIZE) {
mMaxSize.width = MOZ_WIDGET_MAX_SIZE;
}
if (mMaxSize.height > MOZ_WIDGET_MAX_SIZE) {
mMaxSize.height = MOZ_WIDGET_MAX_SIZE;
}
}
mozilla::LayoutDeviceIntSize mMinSize;
mozilla::LayoutDeviceIntSize mMaxSize;
/*
* The scale used to convert from desktop to device dimensions.
* MOZ_WIDGET_INVALID_SCALE if the value is not known.
*
* Bug 1701109 is filed to revisit adding of 'mScale' and deal
* with multi-monitor scaling issues in more complete way across
* all widget implementations.
*/
mozilla::DesktopToLayoutDeviceScale mScale;
};
class MOZ_RAII AutoSynthesizedEventCallbackNotifier final {
public:
explicit AutoSynthesizedEventCallbackNotifier(
nsISynthesizedEventCallback* aCallback)
: mCallback(aCallback) {}
void SkipNotification() { mCallback = nullptr; }
Maybe<uint64_t> SaveCallback() {
if (!mCallback) {
return Nothing();
}
uint64_t callbackId = ++sCallbackId;
sSavedCallbacks.InsertOrUpdate(callbackId, mCallback);
SkipNotification();
return Some(callbackId);
}
~AutoSynthesizedEventCallbackNotifier() {
if (mCallback) {
mCallback->OnCompleteDispatch();
}
}
static void NotifySavedCallback(const uint64_t& aCallbackId) {
MOZ_ASSERT(aCallbackId > 0, "Callback ID must be non-zero");
auto entry = sSavedCallbacks.Extract(aCallbackId);
if (!entry) {
MOZ_ASSERT_UNREACHABLE("We should always find a saved callback");
return;
}
entry.value()->OnCompleteDispatch();
}
private:
nsCOMPtr<nsISynthesizedEventCallback> mCallback;
static uint64_t sCallbackId;
static nsTHashMap<uint64_t, nsCOMPtr<nsISynthesizedEventCallback>>
sSavedCallbacks;
};
} // namespace mozilla::widget
/**
* The base class for all the widgets. It provides the interface for
* all basic and necessary functionality.
*/
class nsIWidget : public nsSupportsWeakReference {
public:
template <class EventType, class InputType>
friend class DispatchEventOnMainThread;
friend class mozilla::widget::InProcessCompositorWidget;
friend class mozilla::layers::RemoteCompositorSession;
typedef mozilla::gfx::DrawTarget DrawTarget;
typedef mozilla::gfx::SourceSurface SourceSurface;
typedef mozilla::layers::CompositorBridgeChild CompositorBridgeChild;
typedef mozilla::layers::CompositorBridgeParent CompositorBridgeParent;
typedef mozilla::layers::IAPZCTreeManager IAPZCTreeManager;
typedef mozilla::layers::GeckoContentController GeckoContentController;
typedef mozilla::layers::ScrollableLayerGuid ScrollableLayerGuid;
typedef mozilla::layers::APZEventState APZEventState;
typedef mozilla::CSSIntRect CSSIntRect;
typedef mozilla::ScreenRotation ScreenRotation;
typedef mozilla::widget::CompositorWidgetDelegate CompositorWidgetDelegate;
typedef mozilla::layers::CompositorSession CompositorSession;
typedef mozilla::layers::ImageContainer ImageContainer;
typedef mozilla::dom::BrowserChild BrowserChild;
typedef mozilla::layers::AsyncDragMetrics AsyncDragMetrics;
typedef mozilla::layers::FrameMetrics FrameMetrics;
typedef mozilla::layers::LayerManager LayerManager;
typedef mozilla::WindowRenderer WindowRenderer;
typedef mozilla::layers::LayersBackend LayersBackend;
typedef mozilla::layers::LayersId LayersId;
typedef mozilla::layers::ZoomConstraints ZoomConstraints;
typedef mozilla::widget::IMEEnabled IMEEnabled;
typedef mozilla::widget::IMEMessage IMEMessage;
typedef mozilla::widget::IMENotification IMENotification;
typedef mozilla::widget::IMENotificationRequest IMENotificationRequest;
typedef mozilla::widget::IMENotificationRequests IMENotificationRequests;
typedef mozilla::widget::IMEState IMEState;
typedef mozilla::widget::InputContext InputContext;
typedef mozilla::widget::InputContextAction InputContextAction;
typedef mozilla::widget::NativeIMEContext NativeIMEContext;
typedef mozilla::widget::SizeConstraints SizeConstraints;
typedef mozilla::widget::TextEventDispatcher TextEventDispatcher;
typedef mozilla::widget::TextEventDispatcherListener
TextEventDispatcherListener;
typedef mozilla::LayoutDeviceMargin LayoutDeviceMargin;
typedef mozilla::LayoutDeviceIntMargin LayoutDeviceIntMargin;
typedef mozilla::LayoutDeviceIntPoint LayoutDeviceIntPoint;
typedef mozilla::LayoutDeviceIntRect LayoutDeviceIntRect;
typedef mozilla::LayoutDeviceRect LayoutDeviceRect;
typedef mozilla::LayoutDeviceIntRegion LayoutDeviceIntRegion;
typedef mozilla::LayoutDeviceIntSize LayoutDeviceIntSize;
typedef mozilla::ScreenIntPoint ScreenIntPoint;
typedef mozilla::ScreenIntMargin ScreenIntMargin;
typedef mozilla::ScreenIntSize ScreenIntSize;
typedef mozilla::ScreenPoint ScreenPoint;
typedef mozilla::CSSToScreenScale CSSToScreenScale;
typedef mozilla::DesktopIntRect DesktopIntRect;
typedef mozilla::DesktopPoint DesktopPoint;
typedef mozilla::DesktopIntPoint DesktopIntPoint;
typedef mozilla::DesktopIntSize DesktopIntSize;
typedef mozilla::DesktopIntMargin DesktopIntMargin;
typedef mozilla::DesktopRect DesktopRect;
typedef mozilla::DesktopSize DesktopSize;
typedef mozilla::CSSPoint CSSPoint;
typedef mozilla::CSSRect CSSRect;
NS_DECL_THREADSAFE_ISUPPORTS
using TouchPointerState = ::TouchPointerState;
using InitData = mozilla::widget::InitData;
using WindowType = mozilla::widget::WindowType;
using PopupType = mozilla::widget::PopupType;
using PopupLevel = mozilla::widget::PopupLevel;
using BorderStyle = mozilla::widget::BorderStyle;
using TransparencyMode = mozilla::widget::TransparencyMode;
using Screen = mozilla::widget::Screen;
// Used in UpdateThemeGeometries.
struct ThemeGeometry {
// The ThemeGeometryType value for the themed widget, see
// nsITheme::ThemeGeometryTypeForWidget.
nsITheme::ThemeGeometryType mType;
// The device-pixel rect within the window for the themed widget
LayoutDeviceIntRect mRect;
ThemeGeometry(nsITheme::ThemeGeometryType aType,
const LayoutDeviceIntRect& aRect)
: mType(aType), mRect(aRect) {}
};
NS_INLINE_DECL_STATIC_IID(NS_IWIDGET_IID)
/**
* Create and initialize a widget.
*
* All the arguments can be null in which case a top level window
* with size 0 is created. The event callback function has to be
* provided only if the caller wants to deal with the events this
* widget receives. The event callback is basically a preprocess
* hook called synchronously. The return value determines whether
* the event goes to the default window procedure or it is hidden
* to the os. The assumption is that if the event handler returns
* false the widget does not see the event. The widget should not
* automatically clear the window to the background color. The
* calling code must handle paint messages and clear the background
* itself.
*
* If aParent is null, the widget isn't parented (e.g. context menus or
* independent top level windows).
*
* The dimensions given in aRect are specified in the parent's
* device coordinate system.
* This must not be called for parentless widgets such as top-level
* windows, which use the desktop pixel coordinate system; a separate
* method is provided for these.
*
* @param aParent parent nsIWidget
* @param aRect the widget dimension
* @param aInitData data that is used for widget initialization
*
*/
[[nodiscard]] virtual nsresult Create(nsIWidget* aParent,
const LayoutDeviceIntRect& aRect,
const InitData&) = 0;
/*
* As above, but with aRect specified in DesktopPixel units (for top-level
* widgets).
* Default implementation just converts aRect to device pixels and calls
* through to device-pixel Create, but platforms may override this if the
* mapping is not straightforward or the native platform needs to use the
* desktop pixel values directly.
*/
[[nodiscard]] virtual nsresult Create(nsIWidget* aParent,
const DesktopIntRect& aRect,
const InitData& aInitData) {
LayoutDeviceIntRect devPixRect =
RoundedToInt(aRect * GetDesktopToDeviceScale());
return Create(aParent, devPixRect, aInitData);
}
/**
* Allocate, initialize, and return a widget that is a child of
* |this|. The returned widget (if nonnull) has gone through the
* equivalent of CreateInstance(widgetCID) + Create(...).
*
* |CreateChild()| lets widget backends decide whether to parent
* the new child widget to this, nonnatively parent it, or both.
* This interface exists to support the PuppetWidget backend,
* which is entirely non-native. All other params are the same as
* for |Create()|.
*/
already_AddRefed<nsIWidget> CreateChild(const LayoutDeviceIntRect& aRect,
const InitData&);
/**
* Accessor functions to get and set the attached listener.
*/
void SetAttachedWidgetListener(nsIWidgetListener* aListener) {
mAttachedWidgetListener = aListener;
}
nsIWidgetListener* GetAttachedWidgetListener() const {
return mAttachedWidgetListener;
}
void SetPreviouslyAttachedWidgetListener(nsIWidgetListener* aListener) {
mPreviouslyAttachedWidgetListener = aListener;
}
nsIWidgetListener* GetPreviouslyAttachedWidgetListener() {
return mPreviouslyAttachedWidgetListener;
}
/**
* Notifies the root widget of a non-blank paint.
*/
virtual void DidGetNonBlankPaint() {}
/**
* Accessor functions to get and set the listener which handles various
* actions for the widget.
*/
nsIWidgetListener* GetWidgetListener() const { return mWidgetListener; }
void SetWidgetListener(nsIWidgetListener* aListener) {
mWidgetListener = aListener;
}
/** Returns the listener used for painting */
nsIWidgetListener* GetPaintListener() const;
/**
* Close and destroy the internal native window.
* This method does not delete the widget.
*/
virtual void Destroy();
/**
* Destroyed() returns true if Destroy() has been called already.
* Otherwise, false.
*/
bool Destroyed() const { return mOnDestroyCalled; }
/** Clear the widget's parent. */
void ClearParent();
/**
* Return the parent Widget of this Widget or nullptr if this is a
* top level window
*
* @return the parent widget or nullptr if it does not have a parent
*
*/
nsIWidget* GetParent() const { return mParent; }
/** Gets called when mParent is cleared. */
virtual void DidClearParent(nsIWidget* aOldParent) {}
/**
* Return the top level Widget of this Widget
*
* @return the closest top level widget, as in IsTopLevelWidget().
*/
nsIWidget* GetTopLevelWidget();
bool IsTopLevelWidget() const {
return mWindowType == WindowType::TopLevel ||
mWindowType == WindowType::Dialog ||
mWindowType == WindowType::Invisible;
}
/**
* Return the physical DPI of the screen containing the window ...
* the number of device pixels per inch.
*/
virtual float GetDPI();
/**
* Fallback DPI for when there's no widget available.
*/
static float GetFallbackDPI();
/**
* Return the scaling factor between device pixels and the platform-
* dependent "desktop pixels" used to manage window positions on a
* potentially multi-screen, mixed-resolution desktop.
*/
virtual mozilla::DesktopToLayoutDeviceScale GetDesktopToDeviceScale() {
return mozilla::DesktopToLayoutDeviceScale(1.0);
}
// Utility function for derived-class overrides of ConstrainPosition.
static DesktopIntPoint ConstrainPositionToBounds(
const DesktopIntPoint&, const mozilla::DesktopIntSize&,
const DesktopIntRect&);
void DynamicToolbarOffsetChanged(mozilla::ScreenIntCoord aOffset);
/**
* Return the default scale factor for the window. This is the
* default number of device pixels per CSS pixel to use. This should
* depend on OS/platform settings such as the Mac's "UI scale factor"
* or Windows' "font DPI". This will take into account Gecko preferences
* overriding the system setting.
*/
mozilla::CSSToLayoutDeviceScale GetDefaultScale();
/**
* Fallback default scale for when there's no widget available.
*/
static mozilla::CSSToLayoutDeviceScale GetFallbackDefaultScale();
/**
* Return the first child of this widget. Will return null if
* there are no children.
*/
nsIWidget* GetFirstChild() const { return mFirstChild; }
/**
* Return the last child of this widget. Will return null if
* there are no children.
*/
nsIWidget* GetLastChild() const { return mLastChild; }
/**
* Return the next sibling of this widget
*/
nsIWidget* GetNextSibling() const { return mNextSibling; }
/**
* Set the next sibling of this widget
*/
void SetNextSibling(nsIWidget* aSibling) { mNextSibling = aSibling; }
/**
* Return the previous sibling of this widget
*/
nsIWidget* GetPrevSibling() const { return mPrevSibling; }
/**
* Set the previous sibling of this widget
*/
void SetPrevSibling(nsIWidget* aSibling) { mPrevSibling = aSibling; }
/**
* Show or hide this widget
*
* @param aState true to show the Widget, false to hide it
*
*/
virtual void Show(bool aState) = 0;
/**
* Whether or not a widget must be recreated after being hidden to show
* again properly.
*/
virtual bool NeedsRecreateToReshow() { return false; }
/**
* Make the window modal.
*/
virtual void SetModal(bool aModal) {}
/**
* Are we app modal. Currently only implemented on Cocoa.
*/
virtual bool IsRunningAppModal() { return false; }
/**
* The maximum number of simultaneous touch contacts supported by the device.
* In the case of devices with multiple digitizers (e.g. multiple touch
* screens), the value will be the maximum of the set of maximum supported
* contacts by each individual digitizer.
*/
virtual uint32_t GetMaxTouchPoints() const;
/**
* Returns whether the window is visible
*
*/
virtual bool IsVisible() const = 0;
/**
* Perform platform-dependent sanity check on a potential window position.
* This is guaranteed to work only for top-level windows.
*/
virtual void ConstrainPosition(DesktopIntPoint&) {}
/**
* NOTE:
*
* For a top-level window widget, the "parent's coordinate system" is the
* "global" display pixel coordinate space, *not* device pixels (which
* may be inconsistent between multiple screens, at least in the Mac OS
* case with mixed hi-dpi and lo-dpi displays). This applies to all the
* following Move and Resize widget APIs.
*
* The display-/device-pixel distinction becomes important for (at least)
* macOS with Hi-DPI (retina) displays, and Windows when the UI scale factor
* is set to other than 100%.
*
* The Move and Resize methods take floating-point parameters, rather than
* integer ones. This is important when manipulating top-level widgets,
* where the coordinate system may not be an integral multiple of the
* device-pixel space.
**/
/**
* Move this widget.
*
* Coordinates refer to the top-left of the widget. For toplevel windows
* with decorations, this is the top-left of the titlebar and frame .
*
* @param aX the new x position expressed in the parent's coordinate system
* @param aY the new y position expressed in the parent's coordinate system
*
**/
virtual void Move(const DesktopPoint&) = 0;
/**
* Reposition this widget so that the client area has the given offset.
*
* @param aOffset the new offset of the client area expressed as an
* offset from the origin of the client area of the parent
* widget (for root widgets and popup widgets it is in
* screen coordinates)
**/
void MoveClient(const DesktopPoint& aOffset);
/**
* Resize this widget. Any size constraints set for the window by a
* previous call to SetSizeConstraints will be applied.
*
* @param aWidth the new width expressed in the parent's coordinate system
* @param aHeight the new height expressed in the parent's coordinate
* system
* @param aRepaint whether the widget should be repainted
*/
virtual void Resize(const DesktopSize&, bool aRepaint) = 0;
/**
* Lock the aspect ratio of a Window
* @param aShouldLock bool
*/
virtual void LockAspectRatio(bool aShouldLock) {}
/**
* Move or resize this widget. Any size constraints set for the window by
* a previous call to SetSizeConstraints will be applied.
*
* @param aRepaint whether the widget should be repainted if the size
* changes
*
*/
virtual void Resize(const DesktopRect&, bool aRepaint) = 0;
/**
* Resize the widget so that the inner client area has the given size.
*
* @param aSize the new size of the client area.
* @param aRepaint whether the widget should be repainted
*/
void ResizeClient(const DesktopSize& aSize, bool aRepaint);
/**
* Resize and reposition the widget so tht inner client area has the given
* offset and size.
*
* @param aRect the new offset and size of the client area. The offset is
* expressed as an offset from the origin of the client area
* of the parent widget (for root widgets and popup widgets it
* is in screen coordinates).
* @param aRepaint whether the widget should be repainted
*/
void ResizeClient(const DesktopRect& aRect, bool aRepaint);
/**
* Minimize, maximize or normalize the window size.
* Takes a value from nsSizeMode (see nsIWidgetListener.h)
*/
virtual void SetSizeMode(nsSizeMode aMode) = 0;
virtual void GetWorkspaceID(nsAString& aWorkspaceID) {
aWorkspaceID.Truncate();
}
virtual void MoveToWorkspace(const nsAString& aWorkspaceID) {}
// Assume that it is not, since most widgets are not cloaked.
virtual bool IsCloaked() const { return false; }
/**
* Suppress animations that are applied to a window by OS.
*/
virtual void SuppressAnimation(bool aSuppress) {}
/** Sets windows-specific mica backdrop on this widget. */
virtual void SetMicaBackdrop(bool) {}
/**
* Return size mode (minimized, maximized, normalized).
* Returns a value from nsSizeMode (see nsIWidgetListener.h)
*/
virtual nsSizeMode SizeMode() = 0;
/** Ask whether the window is tiled. */
bool IsTiled() const { return mIsTiled; }
/** Ask whether the widget is fully occluded */
bool IsFullyOccluded() const { return mIsFullyOccluded; }
/**
* Enable or disable this Widget
*
* @param aState true to enable the Widget, false to disable it.
*/
virtual void Enable(bool aState) = 0;
/**
* Ask whether the widget is enabled
*/
virtual bool IsEnabled() const = 0;
/*
* Whether we should request activation of this widget's toplevel window.
*/
enum class Raise {
No,
Yes,
};
/**
* Request activation of this window or give focus to this widget.
*/
virtual void SetFocus(Raise, mozilla::dom::CallerType aCallerType) = 0;
/**
* Get this widget's outside dimensions relative to its parent widget. For
* popup widgets the returned rect is in screen coordinates and not
* relative to its parent widget.
*
* @return the x, y, width and height of this widget.
*/
virtual LayoutDeviceIntRect GetBounds() = 0;
/**
* Get this widget's outside dimensions in device coordinates. This
* includes any title bar on the window.
*
* @return the x, y, width and height of this widget.
*/
virtual LayoutDeviceIntRect GetScreenBounds() { return GetBounds(); }
/**
* Similar to GetScreenBounds except that this function will always
* get the size when the widget is in the nsSizeMode_Normal size mode
* even if the current size mode is not nsSizeMode_Normal.
*
* If PersistClientBounds() is true, then the returned size are client sizes.
*
* This method will fail if the size mode is not nsSizeMode_Normal and
* the platform doesn't have the ability.
* This method will always succeed if the current size mode is
* nsSizeMode_Normal.
*
* @param aRect On return it holds the x, y, width and height of
* this widget.
*/
[[nodiscard]] virtual nsresult GetRestoredBounds(LayoutDeviceIntRect& aRect);
/**
* On some platforms (namely, GTK), we can't know the bounds of the client
* decorations before actually showing the window. For that reason, we instead
* persist client (inner) sizes.
*/
virtual bool PersistClientBounds() const { return false; }
/**
* Get this widget's client area bounds, if the window has a 3D border
* appearance this returns the area inside the border. The position is the
* position of the client area relative to the client area of the parent
* widget (for root widgets and popup widgets it is in screen coordinates).
*
* @return the x, y, width and height of the client area of this widget.
*/
virtual LayoutDeviceIntRect GetClientBounds() { return GetBounds(); }
/** Whether to extend the client area into the titlebar. */
virtual void SetCustomTitlebar(bool) {}
/**
* Sets the region around the edges of the window that can be dragged to
* resize the window. All four sides of the window will get the same margin.
*/
virtual void SetResizeMargin(mozilla::LayoutDeviceIntCoord) {}
/**
* Get the client offset from the window origin.
*
* @return the x and y of the offset.
*/
virtual LayoutDeviceIntPoint GetClientOffset();
/**
* Returns the slop from the screen edges in device pixels.
* @see Window.screenEdgeSlop{X,Y}
*/
virtual LayoutDeviceIntPoint GetScreenEdgeSlop() { return {}; }
/**
* Equivalent to GetClientBounds but only returns the size.
*/
virtual LayoutDeviceIntSize GetClientSize() {
// Depending on the backend, overloading this method may be useful if
// requesting the client offset is expensive.
return GetClientBounds().Size();
}
/**
* Set the native background color for this widget.
*
* Deprecated. Currently only implemented for iOS. (See bug 1901896.)
*
* @param aColor the new background color
*/
virtual void SetBackgroundColor(const nscolor& aColor) {}
struct Cursor {
// The system cursor chosen by the page. This is used if there's no custom
// cursor, or if we fail to use the custom cursor in some way (if the image
// fails to load, for example).
nsCursor mDefaultCursor = eCursor_standard;
// May be null, to represent no custom cursor image.
nsCOMPtr<imgIContainer> mContainer;
uint32_t mHotspotX = 0;
uint32_t mHotspotY = 0;
mozilla::ImageResolution mResolution;
bool IsCustom() const { return !!mContainer; }
bool operator==(const Cursor& aOther) const {
return mDefaultCursor == aOther.mDefaultCursor &&
mContainer.get() == aOther.mContainer.get() &&
mHotspotX == aOther.mHotspotX && mHotspotY == aOther.mHotspotY &&
mResolution == aOther.mResolution;
}
bool operator!=(const Cursor& aOther) const { return !(*this == aOther); }
};
/**
* Sets the cursor for this widget.
*/
virtual void SetCursor(const Cursor&);
virtual void SetCustomCursorAllowed(bool);
/**
* If a cursor type is currently cached locally for this widget, clear the
* cached cursor to force an update on the next SetCursor call.
*/
void ClearCachedCursor() {
mCursor = {};
mUpdateCursor = true;
}
static nsIntSize CustomCursorSize(const Cursor&);
/**
* Get the window type of this widget.
*/
WindowType GetWindowType() const { return mWindowType; }
PopupType GetPopupType() const { return mPopupType; }
bool HasRemoteContent() const { return mHasRemoteContent; }
/**
* Set the transparency mode of the top-level window containing this widget.
* So, e.g., if you call this on the widget for an IFRAME, the top level
* browser window containing the IFRAME actually gets set. Be careful.
*
* This can fail if the platform doesn't support
* transparency/glass. By default widgets are not
* transparent. This will also fail if the toplevel window is not
* a Mozilla window, e.g., if the widget is in an embedded
* context.
*
* After transparency/glass has been enabled, the initial alpha channel
* value for all pixels is 1, i.e., opaque.
* If the window is resized then the alpha channel values for
* all pixels are reset to 1.
* Pixel RGB color values are already premultiplied with alpha channel values.
*/
virtual void SetTransparencyMode(TransparencyMode aMode);
/**
* Get the transparency mode of the top-level window that contains this
* widget.
*/
virtual TransparencyMode GetTransparencyMode();
// Cocoa and GTK round widget coordinates to the nearest global "display
// pixel" integer value; see bug 892994. So we avoid fractional display pixel
// values by rounding to the nearest value that won't yield a fractional
// display pixel.
virtual int32_t RoundsWidgetCoordinatesTo() { return 1; }
static LayoutDeviceIntRect MaybeRoundToDisplayPixels(
const LayoutDeviceIntRect& aRect, TransparencyMode aTransparency,
int32_t aRound);
LayoutDeviceIntRect MaybeRoundToDisplayPixels(
const LayoutDeviceIntRect& aRect) {
return MaybeRoundToDisplayPixels(aRect, GetTransparencyMode(),
RoundsWidgetCoordinatesTo());
}
/**
* Set the shadow style of the window.
*
* Ignored on child widgets and on non-Mac platforms.
*/
virtual void SetWindowShadowStyle(mozilla::WindowShadow aStyle) {}
/**
* Set the opacity of the window.
* Values need to be between 0.0f (invisible) and 1.0f (fully opaque).
*
* Ignored on child widgets and on non-Mac platforms.
*/
virtual void SetWindowOpacity(float aOpacity) {}
/**
* Set the transform of the window. Values are in device pixels,
* the origin is the top left corner of the window.
*
* Ignored on child widgets and on non-Mac platforms.
*/
virtual void SetWindowTransform(const mozilla::gfx::Matrix& aTransform) {}
/**
* Set the preferred color-scheme for the widget. Nothing() means system
* default. Implemented on Windows and macOS.
*/
virtual void SetColorScheme(const mozilla::Maybe<mozilla::ColorScheme>&) {}
/**
* Set whether the window should ignore mouse events or not, and if it should
* not, what input margin should it use.
*
* This is only used on popup windows. The margin is only implemented on
* Linux.
*/
struct InputRegion {
bool mFullyTransparent = false;
mozilla::LayoutDeviceIntCoord mMargin = 0;
};
virtual void SetInputRegion(const InputRegion&) {}
/*
* On macOS, this method shows or hides the pill button in the titlebar
* that's used to collapse the toolbar.
*
* Ignored on child widgets and on non-Mac platforms.
*/
virtual void SetShowsToolbarButton(bool aShow) {}
/*
* On macOS, this method determines whether we tell cocoa that the window
* supports native full screen. If we do so, and another window is in
* native full screen, this window will also appear in native full screen.
*
* We generally only want to do this for primary application windows.
*
* Ignored on child widgets and on non-Mac platforms.
*/
virtual void SetSupportsNativeFullscreen(bool aSupportsNativeFullscreen) {}
enum WindowAnimationType {
eGenericWindowAnimation,
eDocumentWindowAnimation
};
/**
* Sets the kind of top-level window animation this widget should have. On
* macOS, this causes a particular kind of animation to be shown when the
* window is first made visible.
*
* Ignored on child widgets and on non-Mac platforms.
*/
virtual void SetWindowAnimationType(WindowAnimationType aType) {}
/**
* Specifies whether the titlebar separator should be hidden.
* Only implemented on macOS.
*/
virtual void SetHideTitlebarSeparator(bool) {}
// Returns whether the macOS titlebar direction is RTL instead of LTR.
// TODO(emilio): Maybe generalize to other OSes?
virtual bool IsMacTitlebarDirectionRTL() { return false; }
/**
* Hide window chrome (borders, buttons) for this widget.
*/
virtual void HideWindowChrome(bool aShouldHide) {}
enum FullscreenTransitionStage {
eBeforeFullscreenToggle,
eAfterFullscreenToggle
};
/**
* Prepares for fullscreen transition and returns whether the widget
* supports fullscreen transition. If this method returns false,
* PerformFullscreenTransition() must never be called. Otherwise,
* caller should call that method twice with "before" and "after"
* stages respectively in order. In the latter case, this method may
* return some data via aData pointer. Caller must pass that data to
* PerformFullscreenTransition() if any, and caller is responsible
* for releasing that data.
*/
virtual bool PrepareForFullscreenTransition(nsISupports** aData) {
return false;
}
/**
* Performs fullscreen transition. This method returns immediately,
* and will post aCallback to the main thread when the transition
* finishes.
*/
virtual void PerformFullscreenTransition(FullscreenTransitionStage aStage,
uint16_t aDuration,
nsISupports* aData,
nsIRunnable* aCallback);
/**
* Perform any actions needed after the fullscreen transition has ended.
*/
virtual void CleanupFullscreenTransition() {}
/**
* Return the screen the widget is in, or null if we don't know.
*/
virtual already_AddRefed<Screen> GetWidgetScreen();
/**
* Put the toplevel window into or out of fullscreen mode.
*
* @return NS_OK if the widget is setup properly for fullscreen and
* FullscreenChanged callback has been or will be called. If other
* value is returned, the caller should continue the change itself.
*/
virtual nsresult MakeFullScreen(bool aFullScreen);
void InfallibleMakeFullScreen(bool aFullScreen);
/**
* Same as MakeFullScreen, except that, on systems which natively
* support fullscreen transition, calling this method explicitly
* requests that behavior.
* It is currently only supported on macOS 10.7+.
*/
virtual nsresult MakeFullScreenWithNativeTransition(bool aFullScreen) {
return MakeFullScreen(aFullScreen);
}
/**
* Invalidate a specified rect for a widget so that it will be repainted
* later.
*/
virtual void Invalidate(const LayoutDeviceIntRect& aRect) = 0;
enum LayerManagerPersistence {
LAYER_MANAGER_CURRENT = 0,
LAYER_MANAGER_PERSISTENT
};
/**
* Return the widget's LayerManager. The layer tree for that LayerManager is
* what gets rendered to the widget.
*
* Note that this tries to create a renderer if it doesn't exist.
*/
virtual WindowRenderer* GetWindowRenderer();
/**
* Returns whether there's an existing window renderer.
*/
bool HasWindowRenderer() const { return !!mWindowRenderer; }
/**
* Called before each layer manager transaction to allow any preparation
* for DrawWindowUnderlay/Overlay that needs to be on the main thread.
*
* Always called on the main thread.
*/
virtual void PrepareWindowEffects() {}
/**
* Called when Gecko knows which themed widgets exist in this window.
* The passed array contains an entry for every themed widget of the right
* type (currently only StyleAppearance::Toolbar) within the window, except
* for themed widgets which are transformed or have effects applied to them
* (e.g. CSS opacity or filters).
* This could sometimes be called during display list construction
* outside of painting.
* If called during painting, it will be called before we actually
* paint anything.
*/
virtual void UpdateThemeGeometries(const nsTArray<ThemeGeometry>&) {}
/**
* Informs the widget about the region of the window that is opaque.
*
* @param aOpaqueRegion the region of the window that is opaque.
*/
virtual void UpdateOpaqueRegion(const LayoutDeviceIntRegion& aOpaqueRegion) {}
virtual LayoutDeviceIntRegion GetOpaqueRegionForTesting() const { return {}; }
/**
* Informs the widget about the region of the window that is draggable.
*/
virtual void UpdateWindowDraggingRegion(
const LayoutDeviceIntRegion& aRegion) {}
/**
* Tells the widget whether the given input block results in a swipe.
* Should be called in response to a WidgetWheelEvent that has
* mFlags.mCanTriggerSwipe set on it.
*/
virtual void ReportSwipeStarted(uint64_t aInputBlockId, bool aStartSwipe);
// Returns true if |aPanInput| event was used for SwipeTracker, false
// otherwise.
bool MayStartSwipeForNonAPZ(const mozilla::PanGestureInput& aPanInput);
void TrackScrollEventAsSwipe(const mozilla::PanGestureInput& aSwipeStartEvent,
uint32_t aAllowedDirections,
uint64_t aInputBlockId);
struct SwipeInfo {
bool wantsSwipe;
uint32_t allowedDirections;
};
SwipeInfo SendMayStartSwipe(const mozilla::PanGestureInput& aSwipeStartEvent);
// Returns a WidgetWheelEvent which needs to be handled by APZ regardless of
// whether |aPanInput| event was used for SwipeTracker or not.
mozilla::WidgetWheelEvent MayStartSwipeForAPZ(
const mozilla::PanGestureInput& aPanInput,
const mozilla::layers::APZEventResult& aApzResult);
void NotifyWindowDestroyed();
void NotifySizeMoveDone();
using ByMoveToRect = nsIWidgetListener::ByMoveToRect;
void NotifyWindowMoved(const LayoutDeviceIntPoint&,
ByMoveToRect = ByMoveToRect::No);
void NotifyWindowMoved(const DesktopIntPoint&,
ByMoveToRect = ByMoveToRect::No);
// Should be called by derived implementations to notify on system color and
// theme changes. (Only one invocation per change is needed, not one
// invocation per change per window.)
void NotifyThemeChanged(mozilla::widget::ThemeChangeKind);
void NotifyAPZOfDPIChange();
// Return true if this is a simple widget (that is typically not worth
// accelerating)
bool IsSmallPopup() const;
PopupLevel GetPopupLevel() { return mPopupLevel; }
/**
* Internal methods
*/
virtual void* GetNativeData(uint32_t aDataType) = 0;
protected:
nsIWidget();
virtual ~nsIWidget();
explicit nsIWidget(BorderStyle);
// These are methods for CompositorWidgetWrapper, and should only be
// accessed from that class. Derived widgets can choose which methods to
// implement, or none if supporting out-of-process compositing.
virtual bool PreRender(mozilla::widget::WidgetRenderingContext* aContext) {
return true;
}
virtual void PostRender(mozilla::widget::WidgetRenderingContext* aContext) {}
virtual mozilla::layers::NativeLayerRoot* GetNativeLayerRoot() {
return nullptr;
}
virtual already_AddRefed<DrawTarget> StartRemoteDrawing();
virtual already_AddRefed<DrawTarget> StartRemoteDrawingInRegion(
const LayoutDeviceIntRegion& aInvalidRegion) {
return StartRemoteDrawing();
}
virtual void EndRemoteDrawing() {}
virtual void EndRemoteDrawingInRegion(
DrawTarget* aDrawTarget, const LayoutDeviceIntRegion& aInvalidRegion) {
EndRemoteDrawing();
}
virtual void CleanupRemoteDrawing() {}
virtual void CleanupWindowEffects() {}
virtual bool InitCompositor(mozilla::layers::Compositor* aCompositor) {
return true;
}
virtual uint32_t GetGLFrameBufferFormat();
virtual bool CompositorInitiallyPaused() { return false; }
void AddToChildList(nsIWidget* aChild);
void RemoveFromChildList(nsIWidget* aChild);
void RemoveAllChildren();
void ResolveIconName(const nsAString& aIconName, const nsAString& aIconSuffix,
nsIFile** aResult);
virtual void OnDestroy();
void BaseCreate(nsIWidget* aParent, const InitData& aInitData);
virtual void ConfigureAPZCTreeManager();
virtual void ConfigureAPZControllerThread();
virtual already_AddRefed<GeckoContentController>
CreateRootContentController();
mozilla::dom::Document* GetDocument() const;
void EnsureTextEventDispatcher();
// Notify the compositor that a device reset has occurred.
void OnRenderingDeviceReset();
bool UseAPZ() const;
bool AllowWebRenderForThisWindow();
/**
* Dispatch the given MultiTouchInput through APZ to Gecko (if APZ is enabled)
* or directly to gecko (if APZ is not enabled). This function must only
* be called from the main thread, and if APZ is enabled, that must also be
* the APZ controller thread.
*/
void DispatchTouchInput(mozilla::MultiTouchInput& aInput);
/**
* Dispatch the given PanGestureInput through APZ to Gecko (if APZ is enabled)
* or directly to gecko (if APZ is not enabled). This function must only
* be called from the main thread, and if APZ is enabled, that must also be
* the APZ controller thread.
*/
void DispatchPanGestureInput(mozilla::PanGestureInput& aInput);
void DispatchPinchGestureInput(mozilla::PinchGestureInput& aInput);
static bool ConvertStatus(nsEventStatus aStatus) {
return aStatus == nsEventStatus_eConsumeNoDefault;
}
protected:
// Returns whether compositing should use an external surface size.
virtual bool UseExternalCompositingSurface() const { return false; }
/**
* Starts the OMTC compositor destruction sequence.
*
* When this function returns, the compositor should not be
* able to access the opengl context anymore.
* It is safe to call it several times if platform implementations
* require the compositor to be destroyed before ~nsIWidget is
* reached (This is the case with gtk2 for instance).
*/
virtual void DestroyCompositor();
void DestroyLayerManager();
void ReleaseContentController();
void RevokeTransactionIdAllocator();
void FreeShutdownObserver();
void FreeLocalesChangedObserver();
public:
/**
* Set the widget's title.
* Must be called after Create.
*
* @param aTitle string displayed as the title of the widget
*/
virtual nsresult SetTitle(const nsAString& aTitle) = 0;
/**
* Set the widget's icon.
* Must be called after Create.
*
* @param aIconSpec string specifying the icon to use; convention is to
* pass a resource: URL from which a platform-dependent
* resource file name will be constructed
*/
virtual void SetIcon(const nsAString& aIconSpec) {}
/**
* Return this widget's client origin in screen coordinates.
*
* @return screen coordinates stored in the x,y members
*/
virtual LayoutDeviceIntPoint WidgetToScreenOffset() = 0;
/**
* The same as WidgetToScreenOffset(), except in the case of
* PuppetWidget where this method omits the chrome offset.
*/
virtual LayoutDeviceIntPoint TopLevelWidgetToScreenOffset() {
return WidgetToScreenOffset();
}
/**
* For a PuppetWidget, returns the transform from the coordinate
* space of the PuppetWidget to the coordinate space of the
* top-level native widget.
*
* Identity transform in other cases.
*/
virtual mozilla::LayoutDeviceToLayoutDeviceMatrix4x4
WidgetToTopLevelWidgetTransform() {
return mozilla::LayoutDeviceToLayoutDeviceMatrix4x4();
}
mozilla::LayoutDeviceIntPoint WidgetToTopLevelWidgetOffset() {
return mozilla::LayoutDeviceIntPoint::Round(
WidgetToTopLevelWidgetTransform().TransformPoint(
mozilla::LayoutDevicePoint()));
}
/**
* Returns the margins that are applied to go from client sizes to window
* sizes on a normal sizemode window (which includes window borders and
* titlebar).
*
* This method should work even when the window is not yet visible.
*/
virtual LayoutDeviceIntMargin NormalSizeModeClientToWindowMargin() {
return {};
}
/**
* Returns the size difference from client area to window area of a
* normal-sizemode window.
*/
LayoutDeviceIntSize NormalSizeModeClientToWindowSizeDifference();
/**
* Dispatches an event to the widget
*/
virtual nsEventStatus DispatchEvent(mozilla::WidgetGUIEvent*);
/**
* Dispatches an event to APZ only.
* No-op in the child process.
*/
virtual void DispatchEventToAPZOnly(mozilla::WidgetInputEvent* aEvent);
/*
* Dispatch a gecko event for this widget.
* Returns true if it's consumed. Otherwise, false.
*/
virtual bool DispatchWindowEvent(mozilla::WidgetGUIEvent& event);
// A structure that groups the statuses from APZ dispatch and content
// dispatch.
struct ContentAndAPZEventStatus {
// Either of these may not be set if the event was not dispatched
// to APZ or to content.
nsEventStatus mApzStatus = nsEventStatus_eIgnore;
nsEventStatus mContentStatus = nsEventStatus_eIgnore;
};
/**
* Dispatches an event that must be handled by APZ first, when APZ is
* enabled. If invoked in the child process, it is forwarded to the
* parent process synchronously.
*/
virtual ContentAndAPZEventStatus DispatchInputEvent(
mozilla::WidgetInputEvent* aEvent);
/**
* Confirm an APZ-aware event target. This should be used when APZ will
* not need a layers update to process the event.
*/
virtual void SetConfirmedTargetAPZC(
uint64_t aInputBlockId,
const nsTArray<ScrollableLayerGuid>& aTargets) const;
/**
* Returns true if APZ is in use, false otherwise.
*/
virtual bool AsyncPanZoomEnabled() const;
/**
*/
virtual void SwipeFinished();
/**
* Enables the dropping of files to a widget.
*/
virtual void EnableDragDrop(bool aEnable) {}
void AsyncEnableDragDrop(bool aEnable);
/**
* Classify the window for the window manager. Mostly for X11.
*
* @param xulWinType The window type. Characters other than [A-Za-z0-9_-] are
* converted to '_'. Anything before the first colon is
* assigned to name, anything after it to role. If there's
* no colon, assign the whole thing to both role and name.
*
* @param xulWinClass The window class. If set, overrides the normal value.
* Otherwise, the program class it used.
*
* @param xulWinName The window name. If set, overrides the value specified in
* window type. Otherwise, name from window type is used.
*
*/
virtual void SetWindowClass(const nsAString& xulWinType,
const nsAString& xulWinClass,
const nsAString& xulWinName) {}
virtual void SetIsEarlyBlankWindow(bool) {}
/**
* Enables/Disables system capture of any and all events that would cause a
* popup to be rolled up. aListener should be set to a non-null value for
* any popups that are not managed by the popup manager.
* @param aDoCapture true enables capture, false disables capture
*
*/
virtual void CaptureRollupEvents(bool aDoCapture) {}
/**
* Bring this window to the user's attention. This is intended to be a more
* gentle notification than popping the window to the top or putting up an
* alert. See, for example, Win32 FlashWindow or the NotificationManager on
* the Mac. The notification should be suppressed if the window is already
* in the foreground and should be dismissed when the user brings this window
* to the foreground.
* @param aCycleCount Maximum number of times to animate the window per system
* conventions. If set to -1, cycles indefinitely until
* window is brought into the foreground.
*/
[[nodiscard]] virtual nsresult GetAttention(int32_t aCycleCount) {
return NS_OK;
}
/**
* Ask whether there user input events pending. All input events are
* included, including those not targeted at this nsIwidget instance.
*/
virtual bool HasPendingInputEvent();
/*
* Determine whether the widget shows a resize widget. If it does,
* aResizerRect returns the resizer's rect.
*
* Returns false on any platform that does not support it.
*
* @param aResizerRect The resizer's rect in device pixels.
* @return Whether a resize widget is shown.
*/
virtual bool ShowsResizeIndicator(LayoutDeviceIntRect* aResizerRect);
// Dispatch an event that has already been routed through APZ.
nsEventStatus ProcessUntransformedAPZEvent(
mozilla::WidgetInputEvent* aEvent,
const mozilla::layers::APZEventResult& aApzResult);
// TODO: Make this an enum class with MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS or
// EnumSet class.
enum Modifiers : uint32_t {
NO_MODIFIERS = 0x00000000,
CAPS_LOCK = 0x00000001, // when CapsLock is active
NUM_LOCK = 0x00000002, // when NumLock is active
SHIFT_L = 0x00000100,
SHIFT_R = 0x00000200,
CTRL_L = 0x00000400,
CTRL_R = 0x00000800,
ALT_L = 0x00001000, // includes Option
ALT_R = 0x00002000,
COMMAND_L = 0x00004000,
COMMAND_R = 0x00008000,
HELP = 0x00010000,
ALTGRAPH = 0x00020000, // AltGr key on Windows. This emulates
// AltRight key behavior of keyboard
// layouts which maps AltGr to AltRight
// key.
FUNCTION = 0x00100000,
NUMERIC_KEY_PAD = 0x01000000 // when the key is coming from the keypad
};
/**
* Utility method intended for testing. Dispatches native key events
* to this widget to simulate the press and release of a key.
* @param aNativeKeyboardLayout a *platform-specific* constant.
* On Mac, this is the resource ID for a 'uchr' or 'kchr' resource.
* On Windows, it is converted to a hex string and passed to
* LoadKeyboardLayout, see
* @param aNativeKeyCode a *platform-specific* keycode.
* On Windows, this is the virtual key code.
* @param aModifiers some combination of the above 'Modifiers' flags;
* not all flags will apply to all platforms. Mac ignores the _R
* modifiers. Windows ignores COMMAND, NUMERIC_KEY_PAD, HELP and
* FUNCTION.
* @param aCharacters characters that the OS would decide to generate
* from the event. On Windows, this is the charCode passed by
* WM_CHAR.
* @param aUnmodifiedCharacters characters that the OS would decide
* to generate from the event if modifier keys (other than shift)
* were assumed inactive. Needed on Mac, ignored on Windows.
* @param aCallback the callback that will get notified once the events
* have been dispatched.
* @return NS_ERROR_NOT_AVAILABLE to indicate that the keyboard
* layout is not supported and the event was not fired
*/
virtual nsresult SynthesizeNativeKeyEvent(
int32_t aNativeKeyboardLayout, int32_t aNativeKeyCode,
uint32_t aModifierFlags, const nsAString& aCharacters,
const nsAString& aUnmodifiedCharacters,
nsISynthesizedEventCallback* aCallback) {
mozilla::widget::AutoSynthesizedEventCallbackNotifier notifier(aCallback);
return NS_ERROR_UNEXPECTED;
}
/**
* Utility method intended for testing. Dispatches native mouse events
* may even move the mouse cursor. On Mac the events are guaranteed to
* be sent to the window containing this widget, but on Windows they'll go
* to whatever's topmost on the screen at that position, so for
* cross-platform testing ensure that your window is at the top of the
* z-order.
* @param aPoint screen location of the mouse, in device
* pixels, with origin at the top left
* @param aNativeMessage abstract native message.
* @param aButton Mouse button defined by DOM UI Events.
* @param aModifierFlags Some values of nsIWidget::Modifiers.
* FYI: On Windows, Android and Headless widget on all
* platroms, this hasn't been handled yet.
* @param aCallback the callback that will get notified once the events
* have been dispatched.
*/
enum class NativeMouseMessage : uint32_t {
ButtonDown, // button down
ButtonUp, // button up
Move, // mouse cursor move
EnterWindow, // mouse cursor comes into a window
LeaveWindow, // mouse cursor leaves from a window
};
virtual nsresult SynthesizeNativeMouseEvent(
LayoutDeviceIntPoint aPoint, NativeMouseMessage aNativeMessage,
mozilla::MouseButton aButton, nsIWidget::Modifiers aModifierFlags,
nsISynthesizedEventCallback* aCallback) {
mozilla::widget::AutoSynthesizedEventCallbackNotifier notifier(aCallback);
return NS_ERROR_UNEXPECTED;
}
/**
* A shortcut to SynthesizeNativeMouseEvent, abstracting away the native
* message. aPoint is location in device pixels to which the mouse pointer
* moves to.
* @param aCallback the callback that will get notified once the events
* have been dispatched.
*/
virtual nsresult SynthesizeNativeMouseMove(
LayoutDeviceIntPoint aPoint, nsISynthesizedEventCallback* aCallback) {
mozilla::widget::AutoSynthesizedEventCallbackNotifier notifier(aCallback);
return NS_ERROR_UNEXPECTED;
}
/**
* Utility method intended for testing. Dispatching native mouse scroll
* events may move the mouse cursor.
*
* @param aPoint Mouse cursor position in screen coordinates.
* In device pixels, the origin at the top left of
* the primary display.
* @param aNativeMessage Platform native message.
* @param aDeltaX The delta value for X direction. If the native
* message doesn't indicate X direction scrolling,
* this may be ignored.
* @param aDeltaY The delta value for Y direction. If the native
* message doesn't indicate Y direction scrolling,
* this may be ignored.
* @param aDeltaZ The delta value for Z direction. If the native
* message doesn't indicate Z direction scrolling,
* this may be ignored.
* @param aModifierFlags Must be values of Modifiers, or zero.
* @param aAdditionalFlags See nsIDOMWidnowUtils' consts and their
* document.
* @param aCallback The callback that will get notified once the
* events have been dispatched.
*/
virtual nsresult SynthesizeNativeMouseScrollEvent(
LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage, double aDeltaX,
double aDeltaY, double aDeltaZ, uint32_t aModifierFlags,
uint32_t aAdditionalFlags, nsISynthesizedEventCallback* aCallback) {
mozilla::widget::AutoSynthesizedEventCallbackNotifier notifier(aCallback);
return NS_ERROR_UNEXPECTED;
}
/*
* TouchpadGesturePhase states for SynthesizeNativeTouchPadPinch and
* SynthesizeNativeTouchpadPan. Match phase states in nsIDOMWindowUtils.idl.
*/
enum TouchpadGesturePhase {
PHASE_BEGIN = 0,
PHASE_UPDATE = 1,
PHASE_END = 2
};
/*
* Create a new or update an existing touch pointer on the digitizer.
* To trigger os level gestures, individual touch points should
* transition through a complete set of touch states which should be
* sent as individual messages.
*
* @param aPointerId The touch point id to create or update.
* @param aPointerState one or more of the touch states listed above
* @param aPoint coords of this event
* @param aPressure 0.0 -> 1.0 float val indicating pressure
* @param aOrientation 0 -> 359 degree value indicating the
* orientation of the pointer. Use 90 for normal taps.
* @param aCallback The callback that will get notified once the events
* have been dispatched.
*/
virtual nsresult SynthesizeNativeTouchPoint(
uint32_t aPointerId, TouchPointerState aPointerState,
LayoutDeviceIntPoint aPoint, double aPointerPressure,
uint32_t aPointerOrientation, nsISynthesizedEventCallback* aCallback) {
mozilla::widget::AutoSynthesizedEventCallbackNotifier notifier(aCallback);
return NS_ERROR_UNEXPECTED;
}
/*
* See nsIDOMWindowUtils.sendNativeTouchpadPinch().
*/
virtual nsresult SynthesizeNativeTouchPadPinch(
TouchpadGesturePhase aEventPhase, float aScale,
LayoutDeviceIntPoint aPoint, int32_t aModifierFlags) {
MOZ_CRASH("SynthesizeNativeTouchPadPinch not implemented on this platform");
return NS_ERROR_UNEXPECTED;
}
/*
* Helper for simulating a simple tap event with one touch point. When
* aLongTap is true, simulates a native long tap with a duration equal to
* ui.click_hold_context_menus.delay. This pref is compatible with the
* apzc long tap duration. Defaults to 1.5 seconds.
* @param aCallback The callback that will get notified once the events
* have been dispatched.
*/
virtual nsresult SynthesizeNativeTouchTap(
LayoutDeviceIntPoint aPoint, bool aLongTap,
nsISynthesizedEventCallback* aCallback);
virtual nsresult SynthesizeNativePenInput(
uint32_t aPointerId, TouchPointerState aPointerState,
LayoutDeviceIntPoint aPoint, double aPressure, uint32_t aRotation,
int32_t aTiltX, int32_t aTiltY, int32_t aButton,
nsISynthesizedEventCallback* aCallback) {
MOZ_CRASH("SynthesizeNativePenInput not implemented on this platform");
return NS_ERROR_UNEXPECTED;
}
/*
* Send a native event as if the user double tapped the touchpad with two
* fingers.
*/
virtual nsresult SynthesizeNativeTouchpadDoubleTap(
LayoutDeviceIntPoint aPoint, uint32_t aModifierFlags) {
MOZ_CRASH(
"SynthesizeNativeTouchpadDoubleTap not implemented on this platform");
return NS_ERROR_UNEXPECTED;
}
/*
* See nsIDOMWindowUtils.sendNativeTouchpadPan().
*/
virtual nsresult SynthesizeNativeTouchpadPan(
TouchpadGesturePhase aEventPhase, LayoutDeviceIntPoint aPoint,
double aDeltaX, double aDeltaY, int32_t aModifierFlags,
nsISynthesizedEventCallback* aCallback) {
MOZ_CRASH("SynthesizeNativeTouchpadPan not implemented on this platform");
return NS_ERROR_UNEXPECTED;
}
virtual void StartAsyncScrollbarDrag(const AsyncDragMetrics& aDragMetrics);
/**
* Notify APZ to start autoscrolling.
* @param aAnchorLocation the location of the autoscroll anchor
* @param aGuid identifies the scroll frame to be autoscrolled
* @return true if APZ has been successfully notified
*/
virtual bool StartAsyncAutoscroll(const ScreenPoint& aAnchorLocation,
const ScrollableLayerGuid& aGuid);
/**
* Notify APZ to stop autoscrolling.
* @param aGuid identifies the scroll frame which is being autoscrolled.
*/
virtual void StopAsyncAutoscroll(const ScrollableLayerGuid& aGuid);
virtual LayersId GetRootLayerTreeId();
/**
* Use this when GetLayerManager() returns a BasicLayerManager
* (nsIWidget::GetLayerManager() does). This sets up the widget's
* layer manager to temporarily render into aTarget.
*
* |aNaturalWidgetBounds| is the un-rotated bounds of |aWidget|.
* |aRotation| is the "virtual rotation" to apply when rendering to
* the target. When |aRotation| is ROTATION_0,
* |aNaturalWidgetBounds| is not used.
*/
class AutoLayerManagerSetup {
public:
AutoLayerManagerSetup(nsIWidget* aWidget, gfxContext* aTarget);
~AutoLayerManagerSetup();
private:
nsIWidget* mWidget;
mozilla::FallbackRenderer* mRenderer = nullptr;
};
friend class AutoLayerManagerSetup;
virtual bool ShouldUseOffMainThreadCompositing();
static nsIRollupListener* GetActiveRollupListener();
void Shutdown();
void QuitIME();
// These functions should be called at the start and end of a "live" widget
// resize (i.e. when the window contents are repainting during the resize,
// such as when the user drags a window border). It will suppress the
// displayport during the live resize to avoid unneccessary overpainting.
void NotifyLiveResizeStarted();
void NotifyLiveResizeStopped();
// If this widget supports out-of-process compositing, it can override
// this method to provide additional information to the compositor.
virtual void GetCompositorWidgetInitData(
mozilla::widget::CompositorWidgetInitData* aInitData) {}
// A remote compositor session tied to this window has been lost and IPC
// messages will no longer work. The widget must clean up any lingering
// resources and possibly schedule another paint.
//
// A reference to the session object is held until this function has
// returned. Callers should hold a reference to the widget, since this
// function could deallocate the widget if it is unparented.
virtual void NotifyCompositorSessionLost(
mozilla::layers::CompositorSession* aSession);
already_AddRefed<mozilla::CompositorVsyncDispatcher>
GetCompositorVsyncDispatcher();
virtual void CreateCompositorVsyncDispatcher();
virtual void CreateCompositor();
virtual void CreateCompositor(int aWidth, int aHeight);
virtual void SetCompositorWidgetDelegate(CompositorWidgetDelegate*) {}
WindowRenderer* CreateFallbackRenderer();
/**
* Returns a FallbackRenderer which is intended to be temporary while
* backgrounded without a GPU process. It listens to GPUProcessManager events
* in order to destroy itself when the GPU process becomes available.
*/
WindowRenderer* CreateBackgroundedFallbackRenderer();
/**
* Setter/Getter of the system font setting for testing.
*/
virtual nsresult SetSystemFont(const nsCString& aFontName) {
return NS_ERROR_NOT_IMPLEMENTED;
}
virtual nsresult GetSystemFont(nsCString& aFontName) {
return NS_ERROR_NOT_IMPLEMENTED;
}
/**
* Wayland specific routines.
*/
virtual LayoutDeviceIntSize GetMoveToRectPopupSize() {
NS_WARNING("GetLayoutPopupRect implemented only for wayland");
return LayoutDeviceIntSize();
}
/**
* If this widget uses native pointer lock instead of warp-to-center
* (currently only GTK on Wayland), these methods provide access to that
* functionality.
*/
virtual void SetNativePointerLockCenter(
const LayoutDeviceIntPoint& aLockCenter) {}
virtual void LockNativePointer() {}
virtual void UnlockNativePointer() {}
/*
* Get safe area insets except to cutout.
*/
virtual mozilla::LayoutDeviceIntMargin GetSafeAreaInsets() const {
return mozilla::LayoutDeviceIntMargin();
}
private:
class LongTapInfo {
public:
LongTapInfo(int32_t aPointerId, LayoutDeviceIntPoint& aPoint,
mozilla::TimeDuration aDuration,
nsISynthesizedEventCallback* aCallback)
: mPointerId(aPointerId),
mPosition(aPoint),
mDuration(aDuration),
mCallback(aCallback),
mStamp(mozilla::TimeStamp::Now()) {}
int32_t mPointerId;
LayoutDeviceIntPoint mPosition;
mozilla::TimeDuration mDuration;
nsCOMPtr<nsISynthesizedEventCallback> mCallback;
mozilla::TimeStamp mStamp;
};
static void OnLongTapTimerCallback(nsITimer* aTimer, void* aClosure);
static already_AddRefed<nsIBidiKeyboard> CreateBidiKeyboardContentProcess();
static already_AddRefed<nsIBidiKeyboard> CreateBidiKeyboardInner();
mozilla::UniquePtr<LongTapInfo> mLongTapTouchPoint;
nsCOMPtr<nsITimer> mLongTapTimer;
static int32_t sPointerIdCounter;
public:
/**
* If key events have not been handled by content or XBL handlers, they can
* be offered to the system (for custom application shortcuts set in system
* preferences, for example).
*/
virtual void PostHandleKeyEvent(mozilla::WidgetKeyboardEvent* aEvent);
/**
* Activates a native menu item at the position specified by the index
* string. The index string is a string of positive integers separated
* by the "|" (pipe) character. The last integer in the string represents
* the item index in a submenu located using the integers preceding it.
*
* Example: 1|0|4
* In this string, the first integer represents the top-level submenu
* in the native menu bar. Since the integer is 1, it is the second submeu
* in the native menu bar. Within that, the first item (index 0) is a
* submenu, and we want to activate the 5th item within that submenu.
*/
virtual nsresult ActivateNativeMenuItemAt(const nsAString& indexString) {
return NS_ERROR_NOT_IMPLEMENTED;
}
/**
* This is used for native menu system testing.
*
* Updates a native menu at the position specified by the index string.
* The index string is a string of positive integers separated by the "|"
* (pipe) character.
*
* Example: 1|0|4
* In this string, the first integer represents the top-level submenu
* in the native menu bar. Since the integer is 1, it is the second submeu
* in the native menu bar. Within that, the first item (index 0) is a
* submenu, and we want to update submenu at index 4 within that submenu.
*
* If this is called with an empty string it forces a full reload of the
* menu system.
*/
virtual nsresult ForceUpdateNativeMenuAt(const nsAString& indexString) {
return NS_ERROR_NOT_IMPLEMENTED;
}
/**
* This is used for testing macOS service menu code.
*
* @param aResult - the current text selection. Is empty if no selection.
* @return nsresult - whether or not aResult was assigned the selected text.
*/
[[nodiscard]] virtual nsresult GetSelectionAsPlaintext(nsAString& aResult) {
return NS_ERROR_NOT_IMPLEMENTED;
}
/**
* Notify IME of the specified notification.
*
* @return If the notification is mouse button event and it's consumed by
* IME, this returns NS_SUCCESS_EVENT_CONSUMED.
*/
nsresult NotifyIME(const IMENotification& aIMENotification);
/**
* MaybeDispatchInitialFocusEvent will dispatch a focus event after creation
* of the widget, in the event that we were not able to observe and respond to
* the initial focus event. This is necessary for the early skeleton UI
* window, which is displayed and receives its initial focus event before we
* can actually respond to it.
*/
virtual void MaybeDispatchInitialFocusEvent() {}
/*
* Notifies the input context changes.
*/
virtual void SetInputContext(const InputContext& aContext,
const InputContextAction& aAction) = 0;
/*
* Get current input context.
*/
virtual InputContext GetInputContext() = 0;
/**
* Get native IME context. This is different from GetNativeData() with
* NS_RAW_NATIVE_IME_CONTEXT, the result is unique even if in a remote
* process.
*/
virtual NativeIMEContext GetNativeIMEContext();
/**
* GetPseudoIMEContext() returns pseudo IME context when TextEventDispatcher
* has non-native input transaction. Otherwise, returns nullptr.
*/
void* GetPseudoIMEContext();
/*
* Given a WidgetKeyboardEvent, this method synthesizes a corresponding
* native (OS-level) event for it. This method allows tests to simulate
* keystrokes that trigger native key bindings (which require a native
* event).
*/
[[nodiscard]] virtual nsresult AttachNativeKeyEvent(
mozilla::WidgetKeyboardEvent& aEvent) {
return NS_ERROR_NOT_IMPLEMENTED;
}
/**
* Retrieve edit commands when the key combination of aEvent is used
* in platform native applications.
*/
MOZ_CAN_RUN_SCRIPT virtual bool GetEditCommands(
mozilla::NativeKeyBindingsType aType,
const mozilla::WidgetKeyboardEvent& aEvent,
nsTArray<mozilla::CommandInt>& aCommands);
/*
* Retrieves a reference to notification requests of IME. Note that the
* reference is valid while the nsIWidget instance is alive. So, if you
* need to store the reference for a long time, you need to grab the widget
* instance too.
*/
const IMENotificationRequests& IMENotificationRequestsRef();
bool ComputeShouldAccelerate();
virtual bool WidgetTypeSupportsAcceleration() { return true; }
virtual bool WidgetTypeSupportsNativeCompositing() { return true; }
/*
* Call this method when a dialog is opened which has a default button.
* The button's rectangle should be supplied in aButtonRect.
*/
[[nodiscard]] virtual nsresult OnDefaultButtonLoaded(
const LayoutDeviceIntRect& aButtonRect) {
return NS_ERROR_NOT_IMPLEMENTED;
}
/**
* Return true if this process shouldn't use platform widgets, and
* so should use PuppetWidgets instead. If this returns true, the
* result of creating and using a platform widget is undefined,
* and likely to end in crashes or other buggy behavior.
*/
static bool UsePuppetWidgets() { return XRE_IsContentProcess(); }
static already_AddRefed<nsIWidget> CreateTopLevelWindow();
static already_AddRefed<nsIWidget> CreateChildWindow();
/**
* Allocate and return a "puppet widget" that doesn't directly
* correlate to a platform widget; platform events and data must
* be fed to it. Currently used in content processes. NULL is
* returned if puppet widgets aren't supported in this build
* config, on this platform, or for this process type.
*
* This function is called "Create" to match CreateInstance().
* The returned widget must still be nsIWidget::Create()d.
*/
static already_AddRefed<nsIWidget> CreatePuppetWidget(
BrowserChild* aBrowserChild);
static already_AddRefed<nsIWidget> CreateHeadlessWidget();
/**
* Return true if widget has it's own GL context
*/
virtual bool HasGLContext() { return false; }
/**
* Returns true to indicate that this widget paints an opaque background
* that we want to be visible under the page, so layout should not force
* a default background.
*/
virtual bool WidgetPaintsBackground() { return false; }
virtual bool NeedsPaint() { return IsVisible() && !GetBounds().IsEmpty(); }
/**
* Get the natural bounds of this widget. This method is only
* meaningful for widgets for which Gecko implements screen
* rotation natively. When this is the case, GetBounds() returns
* the widget bounds taking rotation into account, and
* GetNaturalBounds() returns the bounds *not* taking rotation
* into account.
*
* No code outside of the composition pipeline should know or care
* about this. If you're not an agent of the compositor, you
* probably shouldn't call this method.
*/
virtual LayoutDeviceIntRect GetNaturalBounds() { return GetBounds(); }
/**
* Set size constraints on the window size such that it is never less than
* the specified minimum size and never larger than the specified maximum
* size. The size constraints are sizes of the outer rectangle including
* the window frame and title bar. Use 0 for an unconstrained minimum size
* and NS_MAXSIZE for an unconstrained maximum size. Note that this method
* does not necessarily change the size of a window to conform to this size,
* thus Resize should be called afterwards.
*
* @param aConstraints: the size constraints in device pixels
*/
virtual void SetSizeConstraints(const SizeConstraints& aConstraints);
#ifdef ACCESSIBILITY
// Get the accessible for the window.
mozilla::a11y::LocalAccessible* GetRootAccessible();
#endif
/**
* Return the size constraints currently observed by the widget.
*
* @return the constraints in device pixels
*/
virtual const SizeConstraints GetSizeConstraints();
/**
* Apply the current size constraints to the given size.
*
* @param aWidth width to constrain
* @param aHeight height to constrain
*/
virtual void ConstrainSize(int32_t* aWidth, int32_t* aHeight) {
SizeConstraints c = GetSizeConstraints();
*aWidth = std::clamp(*aWidth, c.mMinSize.width, c.mMaxSize.width);
*aHeight = std::clamp(*aHeight, c.mMinSize.height, c.mMaxSize.height);
}
/**
* If this is owned by a BrowserChild, return that. Otherwise return
* null.
*/
virtual BrowserChild* GetOwningBrowserChild() { return nullptr; }
/*
* Returns the layersId for this widget.
*/
virtual LayersId GetLayersId() const;
/**
* If this isn't directly compositing to its window surface,
* return the compositor which is doing that on our behalf.
*/
virtual CompositorBridgeChild* GetRemoteRenderer();
/**
* If there is a remote renderer, pause or resume it.
*/
virtual void PauseOrResumeCompositor(bool aPause);
/**
* Clear WebRender resources
*/
virtual void ClearCachedWebrenderResources();
/**
* Request fast snapshot at RenderCompositor of WebRender.
* Since readback of Windows DirectComposition is very slow.
*/
virtual bool SetNeedFastSnaphot();
/** Notify the widget that this window is being used with OMTC. */
virtual void WindowUsesOMTC() {}
virtual void RegisterTouchWindow() {}
/**
* If this widget has its own vsync dispatcher, return it, otherwise return
* nullptr. An example of such a local vsync dispatcher would be Wayland frame
* callbacks.
*/
virtual RefPtr<mozilla::VsyncDispatcher> GetVsyncDispatcher();
/**
* Returns true if the widget requires synchronous repaints on resize,
* false otherwise.
*/
virtual bool SynchronouslyRepaintOnResize() { return true; }
virtual void UpdateZoomConstraints(
const uint32_t& aPresShellId, const ScrollableLayerGuid::ViewID& aViewId,
const mozilla::Maybe<ZoomConstraints>& aConstraints);
/**
* GetTextEventDispatcher() returns TextEventDispatcher belonging to the
* widget. Note that this never returns nullptr.
*/
TextEventDispatcher* GetTextEventDispatcher();
// Gets the pres shell this widget is managed by.
mozilla::PresShell* GetPresShell() const;
/**
* GetNativeTextEventDispatcherListener() returns a
* TextEventDispatcherListener instance which is used when the widget
* instance handles native IME and/or keyboard events.
*/
virtual TextEventDispatcherListener* GetNativeTextEventDispatcherListener();
/**
* Trigger an animation to zoom to the given |aRect|.
* |aRect| should be relative to the layout viewport of the widget's root
* document
*/
virtual void ZoomToRect(const uint32_t& aPresShellId,
const ScrollableLayerGuid::ViewID& aViewId,
const CSSRect& aRect, const uint32_t& aFlags);
/**
* LookUpDictionary shows the dictionary for the word around current point.
*
* @param aText the word to look up dictiorary.
* @param aFontRangeArray text decoration of aText
* @param aIsVertical true if the word is vertical layout
* @param aPoint top-left point of aText
*/
virtual void LookUpDictionary(
const nsAString& aText,
const nsTArray<mozilla::FontRange>& aFontRangeArray,
const bool aIsVertical, const LayoutDeviceIntPoint& aPoint) {}
virtual void RequestFxrOutput() {
MOZ_ASSERT(false, "This function should only execute in Windows");
}
/**
* NotifyCompositorScrollUpdate notify widget about an update to the
* composited scroll offset and zoom
*/
virtual void NotifyCompositorScrollUpdate(
const mozilla::layers::CompositorScrollUpdate& aUpdate) {}
#if defined(MOZ_WIDGET_ANDROID)
/**
* RecvToolbarAnimatorMessageFromCompositor receive message from compositor
* thread.
*
* @param aMessage message being sent to Android UI thread.
*/
virtual void RecvToolbarAnimatorMessageFromCompositor(int32_t aMessage) {}
virtual void UpdateDynamicToolbarMaxHeight(mozilla::ScreenIntCoord aHeight) {}
virtual mozilla::ScreenIntCoord GetDynamicToolbarMaxHeight() const {
return 0;
}
#endif
void EnsureLocalesChangedObserver();
virtual void LocalesChanged() {}
virtual void NotifyOcclusionState(mozilla::widget::OcclusionState) {}
static already_AddRefed<nsIBidiKeyboard> CreateBidiKeyboard();
// If this is a popup, returns the associated frame if any.
nsMenuPopupFrame* GetPopupFrame() const;
// Returns the frame currently associated to this widget.
nsIFrame* GetFrame() const;
/**
* Like GetDefaultScale, but taking into account only the system settings
* and ignoring Gecko preferences.
*/
virtual double GetDefaultScaleInternal() { return 1.0; }
// On a given platform, we might have three kinds of widgets:
// In the parent process, we might have native, puppet, or headless widgets.
// In child processes, we only have Puppet widgets.
enum class WidgetType : uint8_t {
Native,
Headless,
Puppet,
};
bool IsPuppetWidget() const { return mWidgetType == WidgetType::Puppet; }
bool IsHeadlessWidget() const { return mWidgetType == WidgetType::Headless; }
bool IsNativeWidget() const { return mWidgetType == WidgetType::Native; }
using WindowButtonType = mozilla::WindowButtonType;
/**
* Layout uses this to alert the widget to the client rect representing
* the window maximize button. An empty rect indicates there is no
* maximize button (for example, in fullscreen). This is only implemented
* on Windows.
*/
virtual void SetWindowButtonRect(WindowButtonType aButtonType,
const LayoutDeviceIntRect& aClientRect) {}
/**
* Provide haptic feedback for this widget.
*/
virtual void PerformHapticFeedback(mozilla::HapticFeedbackType aType) {}
#ifdef DEBUG
virtual nsresult SetHiDPIMode(bool aHiDPI) {
return NS_ERROR_NOT_IMPLEMENTED;
}
virtual nsresult RestoreHiDPIMode() { return NS_ERROR_NOT_IMPLEMENTED; }
#endif
protected:
// keep the list of children. We also keep track of our siblings.
// The ownership model is as follows: parent holds a strong ref to
// the first element of the list, and each element holds a strong
// ref to the next element in the list. The prevsibling and
// lastchild pointers are weak, which is fine as long as they are
// maintained properly.
nsCOMPtr<nsIWidget> mFirstChild;
nsIWidget* MOZ_NON_OWNING_REF mLastChild = nullptr;
nsCOMPtr<nsIWidget> mNextSibling;
nsIWidget* MOZ_NON_OWNING_REF mPrevSibling = nullptr;
// Keeps us alive.
nsIWidget* MOZ_NON_OWNING_REF mParent = nullptr;
// When Destroy() is called, the sub class should set this true.
bool mOnDestroyCalled = false;
WindowType mWindowType = WindowType::TopLevel;
WidgetType mWidgetType = WidgetType::Native;
nsIWidgetListener* mWidgetListener = nullptr;
nsIWidgetListener* mAttachedWidgetListener = nullptr;
nsIWidgetListener* mPreviouslyAttachedWidgetListener = nullptr;
RefPtr<WindowRenderer> mWindowRenderer;
RefPtr<CompositorSession> mCompositorSession;
RefPtr<CompositorBridgeChild> mCompositorBridgeChild;
mozilla::UniquePtr<mozilla::Mutex> mCompositorVsyncDispatcherLock;
RefPtr<mozilla::CompositorVsyncDispatcher> mCompositorVsyncDispatcher;
RefPtr<IAPZCTreeManager> mAPZC;
RefPtr<GeckoContentController> mRootContentController;
RefPtr<APZEventState> mAPZEventState;
RefPtr<mozilla::widget::WidgetShutdownObserver> mShutdownObserver;
RefPtr<mozilla::widget::LocalesChangedObserver> mLocalesChangedObserver;
RefPtr<TextEventDispatcher> mTextEventDispatcher;
RefPtr<mozilla::SwipeTracker> mSwipeTracker;
mozilla::UniquePtr<mozilla::SwipeEventQueue> mSwipeEventQueue;
Cursor mCursor;
bool mCustomCursorAllowed = true;
BorderStyle mBorderStyle;
bool mIsTiled;
PopupLevel mPopupLevel;
PopupType mPopupType;
SizeConstraints mSizeConstraints;
bool mHasRemoteContent;
struct FullscreenSavedState {
DesktopRect windowRect;
DesktopRect screenRect;
};
mozilla::Maybe<FullscreenSavedState> mSavedBounds;
bool mUpdateCursor;
bool mIMEHasFocus;
bool mIMEHasQuit;
// if the window is fully occluded (rendering may be paused in response)
bool mIsFullyOccluded;
bool mNeedFastSnaphot;
// This flag is only used when APZ is off. It indicates that the current pan
// gesture was processed as a swipe. Sometimes the swipe animation can finish
// before momentum events of the pan gesture have stopped firing, so this
// flag tells us that we shouldn't allow the remaining events to cause
// scrolling. It is reset to false once a new gesture starts (as indicated by
// a PANGESTURE_(MAY)START event).
bool mCurrentPanGestureBelongsToSwipe;
mozilla::widget::PiPType mPiPType;
struct InitialZoomConstraints {
InitialZoomConstraints(const uint32_t& aPresShellID,
const ScrollableLayerGuid::ViewID& aViewID,
const ZoomConstraints& aConstraints)
: mPresShellID(aPresShellID),
mViewID(aViewID),
mConstraints(aConstraints) {}
uint32_t mPresShellID;
ScrollableLayerGuid::ViewID mViewID;
ZoomConstraints mConstraints;
};
mozilla::Maybe<InitialZoomConstraints> mInitialZoomConstraints;
// This points to the resize listeners who have been notified that a live
// resize is in progress. This should always be empty when a live-resize is
// not in progress.
nsTArray<RefPtr<mozilla::LiveResizeListener>> mLiveResizeListeners;
#ifdef DEBUG
protected:
static void debug_DumpInvalidate(FILE* aFileOut, nsIWidget* aWidget,
const LayoutDeviceIntRect* aRect,
const char* aWidgetName, int32_t aWindowID);
static void debug_DumpEvent(FILE* aFileOut, nsIWidget* aWidget,
mozilla::WidgetGUIEvent* aGuiEvent,
const char* aWidgetName, int32_t aWindowID);
static void debug_DumpPaintEvent(FILE* aFileOut, nsIWidget* aWidget,
const nsIntRegion& aPaintEvent,
const char* aWidgetName, int32_t aWindowID);
static bool debug_GetCachedBoolPref(const char* aPrefName);
#endif
private:
already_AddRefed<mozilla::layers::WebRenderLayerManager>
CreateCompositorSession(int aWidth, int aHeight,
mozilla::layers::CompositorOptions* aOptionsOut);
};
#endif // nsIWidget_h_