Crate inset_embedder 

Flutter’s dart:ui: host traits (Platform, View) and value types (Offset, Color, Canvas, Paint, Shadow).

The framework depends on this crate. This crate does not depend on the framework. Hosts implement Platform and View, and invoke EmbedderClient on the client the start closure returns. They do not name App.

Re-exports

pub use valo;

Structs

ApplicationSwitcherDescription

Specifies a description of the application that is pertinent to the embedder’s application switcher (also known as “recent tasks”) user interface.

AutofillConfiguration

A collection of autofill related information that represents an AutofillClient.

Backdrop

Backdrop filters the sampled scene before a save layer’s children paint.

Color

An immutable color value in ARGB format.

FontCollection

FontCollection owns registered faces and sources for resolving missing fonts.

FontDemand

FontDemand describes font requests that no registered face could satisfy.

FontFeature

A feature tag and value that affect the selection of glyphs in a font.

FontId

FontId identifies a registered font within a FaceSet or FontCollection.

FontVariation

An axis tag and value that can be used to customize variable fonts.

FontWeight

The thickness of the glyphs used to draw the text.

Frame

One complete engine frame delivered to the client.

GestureSettings

A null field indicates that the platform or view does not have a preference and the fallback constants should be used instead.

GlyphInfo

The measurements of a character (or a sequence of visually connected characters) within a paragraph.

Image

Image is a cheap-to-clone handle to an immutable GPU image.

ImageFrame

One decoded frame, prepared and ready to draw. Flutter dart:ui FrameInfo.

InertPlatform

Platform for hand-pumped tests.

Instant

A measurement of a monotonically nondecreasing clock. Opaque and useful only with Duration.

KeyData

Information about a key event.

LineMetrics

LineMetrics stores the measurements and statistics of a single line in the paragraph.

Locale

An identifier used to select a user’s language and formatting preferences.

MaskBlur

MaskBlur applies a Gaussian blur to a draw’s coverage mask.

Matrix4

Matrix is a full 4×4 column-major transform.

Offset

An immutable 2D floating-point offset.

Paint

Paint describes how a drawing operation produces and composites pixels.

Paragraph

A paragraph of text.

ParagraphBuilder

Builds a Paragraph containing text with the given styling information.

ParagraphConstraints

Layout constraints for Paragraph objects.

ParagraphStyle

An opaque object that determines the configuration used by ParagraphBuilder to position lines within a Paragraph of text.

Path

Path is an immutable collection of line and Bézier contours.

PathBuilder

PathBuilder records commands used to create an immutable Path.

PointerData

Information about the state of a pointer.

PointerDataPacket

A sequence of reports about the state of pointers.

Quaternion

A rotation as a unit quaternion.

RRect

An immutable rounded rectangle with the custom radii for all four corners.

RSuperellipse

An immutable rounded superellipse.

Radius

A radius for either circular or elliptical shapes.

RawFloatingCursorPoint

The current state and position of the floating cursor.

Rect

An immutable, 2D, axis-aligned, floating-point rectangle whose coordinates are relative to a given origin.

RestorationUpdate

What the host answers when the framework asks for the restoration data it stored.

SceneBuilder

Builds a Scene containing the given visuals.

Shadow

A representation of a shadow.

Size

Holds a 2D floating-point size.

Stroke

Stroke describes the width, ends, joins, and optional dash pattern of a line.

SystemFontSource

The engine’s font manager: the platform’s installed fonts through a FontManager, and the two family names Flutter’s engine defines for the platform’s own user-interface font.

SystemUiOverlayStyle

Specifies a system overlay style for a portion of the app.

TextBox

A rectangle enclosing a run of text.

TextDecoration

A linear decoration to draw near the text.

TextEditingValue

The current text, selection, and composing state for editing a run of text.

TextHeightBehavior

Defines how to apply TextStyle.height over and under text.

TextInputConfiguration

Controls the visual appearance of the text input control.

TextInputType

The type of information for which to optimize the text input control.

TextPosition

A position in a string of text.

TextRange

A range of characters in a string of text.

TextSelection

A range of text that represents a selection.

TextStyle

An opaque object that determines the size, position, and rendering of text.

Typeface

Typeface is one face the platform matched: a font file, the face’s index in it, and how the platform names and styles that face.

Vector3

A three-dimensional vector.

ViewConstraints

Immutable layout constraints for a view (dart:ui ViewConstraints).

ViewFocusEvent

An event for the engine to communicate view focus changes to the app. Flutter counterpart: ViewFocusEvent in dart:ui/platform_dispatcher.dart.

ViewId

Opaque id for one View (FlutterView.viewId).

ViewMetrics

Per-view geometry the host reports (_ViewConfiguration fields we use).

ViewPadding

Physical padding on each side of a view (dart:ui ViewPadding).

WindowConfig

How a window is made. Sizes and positions are logical, in the host’s screen space with the origin at the top left of the primary screen.

Enums

AppExitResponse

The possible responses to a request to exit the application.

AppLifecycleState

States that an application can be in once it is running.

BlendMode

BlendMode controls how source pixels combine with destination pixels.

BlurStyle

BlurStyle controls where blurred coverage appears relative to a shape.

BoxHeightStyle

Defines various ways to vertically bound the boxes returned by Paragraph::get_boxes_for_range.

BoxWidthStyle

Defines various ways to horizontally bound the boxes returned by Paragraph::get_boxes_for_range.

Brightness

Describes the contrast of a theme or color palette.

Clip

Different ways to clip content.

ClipOp

ClipOp controls how a clip shape changes the current clip.

ColorFilter

A description of a color filter to apply when drawing a shape or compositing a layer with a particular Paint. A color filter is a function that takes two colors, and outputs one color. When applied during compositing, it is independently applied to each pixel of the layer being drawn before the entire layer is merged with the destination.

ColorSpace

The color space describes the colors that are available to an Image.

FillRule

FillRule determines which regions of overlapping contours are filled.

FloatingCursorDragState

The state of a “floating cursor” drag on an iOS soft keyboard.

FontStyle

Whether to use the italic type variation of glyphs in the font.

HapticFeedbackType

The kind of haptic feedback to play.

ImageDecodeError

Why an image could not be read. Flutter reports these as an exception on the codec future.

ImageFilter

A filter operation to apply to a raster image.

ImageRepetition

How an animation repeats once it has played through.

KeyEventDeviceType

The source device for the key event.

KeyEventType

The type of a key event.

MatrixKind

MatrixKind classifies the behavior relevant to two-dimensional rendering.

PaintStyle

PaintStyle selects filled geometry or a stroked outline.

PlaceholderAlignment

Where to vertically align the placeholder relative to the surrounding text.

PointerChange

How the pointer has changed since the last report.

PointerDeviceKind

The kind of pointer device.

PointerSignalKind

The kind of pointer signal event.

PopupMenuEntry

One line of a popup menu the host shows with its own menu system.

RawWindowHandle

A window handle for a particular windowing system.

RestorationData

One value in the restoration data, of the kinds StandardMessageCodec can carry.

SmartDashesType

Indicates how to handle the intelligent replacement of dashes in text input.

SmartQuotesType

Indicates how to handle the intelligent replacement of quotes in text input.

SystemContextMenuItem

A button to show in the system-rendered context menu.

SystemMouseCursorKind

A system cursor kind (SystemMouseCursor.kind). The host maps each to its native cursor and shows the basic arrow for one it lacks; None hides the cursor.

TargetPlatform

The platform that user interaction should adapt to target.

TextAffinity

A way to disambiguate a TextPosition when its offset could match two different locations in the rendered string.

TextAlign

Whether and how to align text horizontally.

TextBaseline

A horizontal line used for aligning text.

TextCapitalization

Configures how the platform keyboard will select an uppercase or lowercase keyboard.

TextDecorationStyle

The style in which to draw a text decoration

TextDirection

A direction in which text flows.

TextInputAction

An action the user has requested the text input control to perform.

TextLeadingDistribution

How the leading of the text is distributed over and under the text.

ViewFocusDirection

Represents the direction in which focus transitioned across views.

ViewFocusState

Represents the focus state of a given view.

WindowBackground

What the window shows behind the app’s painting. Anything but Solid lets what is behind the window show where the app paints nothing.

WindowError

WindowLevel

Constants

K_TEXT_HEIGHT_NONE

A TextStyle.height value that indicates the text span should take the height defined by the font, which may not be exactly the height of fontSize.

Traits

CanvasText

Paragraph drawing on a Canvas (Dart’s Canvas.drawParagraph).

Clipboard

The system clipboard: Flutter’s Clipboard over the platform channel.

EmbedderClient

Complete frames and typed view lifecycle notifications.

FontManager

FontManager is the platform’s font lookup, in the shape of Skia’s SkFontMgr.

FontSource

FontSource locates fonts that are not already registered.

Haptics

Flutter’s HapticFeedback.

HostWindow

A window the host has on screen. Its view is what the framework draws into and receives input from, like the implicit view.

ImageCodec

One encoded image, opened and ready to give up its frames. Flutter dart:ui Codec.

MouseCursor

Flutter’s mouse cursor channel.

Platform

The long-lived host object held by the application.

PopupMenus

A native pop-up menu shown at the pointer, answered with the index chosen.

Restoration

Flutter’s restoration channel: state kept across relaunches.

SystemChrome

Flutter’s SystemChrome: the system UI around the app.

SystemContextMenu

Flutter’s SystemContextMenu: the system’s own menu over a text selection.

TextInputHost

The host side of Flutter’s text input connection for one view.

TextServices

The text services a selection toolbar offers: Flutter’s LookUp, SearchWeb and Share platform-channel calls.

View

A stable handle to one host-provided view.

WindowingOwner

The host’s window maker. None from crate::Platform::windowing_owner where the implicit view is the only one there can be.

Functions

clamp_double

Same as f64::clamp but maps NaN to max.

compose

Composes a matrix from translation, rotation and scale.

decompose

Decomposes matrix into its translation, rotation and scale components.

default_font_families

Flutter txt::GetDefaultFontFamilies(): the family names FontCollection::setDefaultFontManager looks up when a style leaves fontFamily unset.

flattened_ops

The picture’s operations in replay order with every embedded list’s following its embedding op, for a test or a diagnostic that asks what a scene draws regardless of how its layers nested it.

lerp_double

Linearly interpolate between two numbers, a and b, by an extrapolation factor t.

lerp_int

Linearly interpolate between two integers.

rrect_radii_elliptical

Per-corner elliptical radii in valo’s order (clockwise from top-left).

rsuperellipse_radii_elliptical

Per-corner elliptical radii in valo’s order (clockwise from top-left).

set_default_font_manager

Flutter skia::textlayout::FontCollection::setDefaultFontManager: register the default family’s faces as the collection’s fallback chain, then keep source for later lookups.

transform3

Transforms a point as a 3-vector, with no perspective division.

Type Aliases

Canvas

Flutter Canvas — valo records into a display list.

EngineLayer

Flutter EngineLayer — the display list a layer’s subtree recorded when it was last added to a scene, which SceneBuilder::add_retained embeds again while nothing in it changed. The engine keeps a node of its layer tree; valo keeps a nested list.

ImageCodecFuture

A codec being opened. Flutter’s Future<ui.Codec>.

ImageFrameFuture

A frame being decoded. Flutter’s Future<ui.FrameInfo>.

Picture

Flutter Picture — a finished display list, what crate::View::present takes (Flutter FlutterView.render takes a Scene).

PlatformRef

RestorationMap

Flutter’s Map<Object?, Object?> of restoration data: insertion-ordered, keyed by value.

Scene

Flutter Scene — what SceneBuilder::build produces and crate::View::present takes.

ViewRef

WindowFuture

A window being made: the host finishes it on its own loop.

WindowRef