shell

package
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 Go to latest Published: May 14, 2026 License: MIT Imports: 7 Imported by: 0

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Index

Constants

View Source 
const NativeBridgeContractSchemaVersion = "vango.native_bridge_contract.v1"

Variables

This section is empty.

Functions

func AllowsCommand 

func AllowsCommand(capabilities CapabilitySet, kind CommandKind) bool

AllowsCommand reports whether the capability set permits the shell command.

func AllowsRequest 

func AllowsRequest(capabilities CapabilitySet, kind RequestKind) bool

AllowsRequest reports whether the capability set permits the shell request.

func IsUnsupported 

func IsUnsupported(err error) bool

IsUnsupported reports whether err indicates an unavailable shell operation.

Types

type Bridge 

type Bridge interface {
	Surface() surface.Info
	Capabilities() CapabilitySet
	Events() *EventStream
	Dispatch(cmd Command) error
	Request(ctx context.Context, req Request) (Response, error)
}

Bridge normalizes native shell capabilities across surfaces.

func UnavailableBridge 

func UnavailableBridge(info surface.Info) Bridge

UnavailableBridge returns a bridge that exposes no capabilities and fails explicitly.

type Capability 

type Capability string

Capability identifies a normalized shell feature. 

const (
	CapabilityWindowTitle        Capability = "window.title"
	CapabilityWindowDefaultSize  Capability = "window.default_size"
	CapabilityWindowMinimumSize  Capability = "window.minimum_size"
	CapabilityMenu               Capability = "app.menu"
	CapabilityOpenFileDialog     Capability = "dialog.open_file"
	CapabilitySaveFileDialog     Capability = "dialog.save_file"
	CapabilityClipboardReadText  Capability = "clipboard.read_text"
	CapabilityClipboardWriteText Capability = "clipboard.write_text"
	CapabilityNotification       Capability = "notification.show"
	CapabilityOpenExternalURL    Capability = "url.open_external"
	CapabilityRevealFile         Capability = "file.reveal"
	CapabilityDeepLinks          Capability = "deep_link.receive"
	CapabilitySignInWithApple    Capability = "auth.sign_in_with_apple"
	CapabilityRemotePushRegister Capability = "push.register_remote"
	CapabilityIAPProductsQuery   Capability = "iap.products.query"
	CapabilityIAPPurchase        Capability = "iap.purchase"
	CapabilityIAPRestore         Capability = "iap.restore"
	CapabilityIAPCurrentEnts     Capability = "iap.current_entitlements"
	CapabilityIAPManageSubs      Capability = "iap.manage_subscriptions"
)

type CapabilitySet 

type CapabilitySet struct {
	// contains filtered or unexported fields
}

CapabilitySet reports the capabilities offered by a shell bridge.

func NewCapabilitySet 

func NewCapabilitySet(capabilities ...Capability) CapabilitySet

NewCapabilitySet constructs a set from the provided capabilities.

func (CapabilitySet) Clone 

func (s CapabilitySet) Clone() CapabilitySet

Clone returns a deep copy of the set.

func (CapabilitySet) Has 

func (s CapabilitySet) Has(capability Capability) bool

Has reports whether the capability is present.

func (CapabilitySet) Map 

func (s CapabilitySet) Map() map[string]bool

Map returns the capability manifest as a bool map suitable for bootstrap payloads.

func (CapabilitySet) Merge 

func (s CapabilitySet) Merge(other CapabilitySet) CapabilitySet

Merge returns a new set containing both sets' capabilities.

func (CapabilitySet) Strings 

func (s CapabilitySet) Strings() []string

Strings returns the capability names in deterministic order.

type ClipboardTextResult 

type ClipboardTextResult struct {
	Text string `json:"text,omitempty"`
}

ClipboardTextResult returns text read from the system clipboard.

type Command 

type Command struct {
	Kind    CommandKind     `json:"kind"`
	Payload json.RawMessage `json:"payload,omitempty"`
}

Command is a serialized shell command envelope.

func OpenExternalURL 

func OpenExternalURL(url string) Command

OpenExternalURL builds an external URL command.

func RevealFile 

func RevealFile(path string) Command

RevealFile builds a Finder reveal command.

func SetMenu 

func SetMenu(menu Menu) Command

SetMenu builds a menu definition command.

func SetWindowDefaultSize 

func SetWindowDefaultSize(size Size) Command

SetWindowDefaultSize builds a default window size command.

func SetWindowMinimumSize 

func SetWindowMinimumSize(size Size) Command

SetWindowMinimumSize builds a minimum window size command.

func SetWindowTitle 

func SetWindowTitle(title string) Command

SetWindowTitle builds a window title command.

func ShowNotification 

func ShowNotification(notification Notification) Command

ShowNotification builds a notification command.

func WriteClipboardText 

func WriteClipboardText(text string) Command

WriteClipboardText builds a clipboard write command.

type CommandKind 

type CommandKind string

CommandKind identifies a fire-and-forget shell command. 

const (
	CommandSetWindowTitle       CommandKind = "window.set_title"
	CommandSetWindowDefaultSize CommandKind = "window.set_default_size"
	CommandSetWindowMinimumSize CommandKind = "window.set_minimum_size"
	CommandSetMenu              CommandKind = "app.set_menu"
	CommandShowNotification     CommandKind = "notification.show"
	CommandWriteClipboardText   CommandKind = "clipboard.write_text"
	CommandOpenExternalURL      CommandKind = "url.open_external"
	CommandRevealFile           CommandKind = "file.reveal"
)
type DeepLink struct {
	URL  string `json:"url"`
	Path string `json:"path,omitempty"`
}

DeepLink reports that the app was opened via a native deep link.

type Event 

type Event struct {
	Kind         EventKind          `json:"kind"`
	WindowID     string             `json:"windowID,omitempty"`
	Menu         *MenuEvent         `json:"menu,omitempty"`
	DeepLink     *DeepLink          `json:"deepLink,omitempty"`
	Files        *FilesEvent        `json:"files,omitempty"`
	Notification *NotificationEvent `json:"notification,omitempty"`
	Push         *PushEvent         `json:"push,omitempty"`
}

Event is delivered from the native host back into Vango app code.

func DeepLinkOpened 

func DeepLinkOpened(windowID, rawURL, path string) Event

DeepLinkOpened builds a deep-link event.

func EventFromRelay 

func EventFromRelay(msg RelayMessage) (Event, error)

EventFromRelay converts an event relay message into a normalized shell event.

func FilesOpened 

func FilesOpened(windowID string, paths []string) Event

FilesOpened builds a file-open event. 

func MenuItemSelected(windowID, itemID string) Event

MenuItemSelected builds a menu selection event.

func NotificationOpened added in v0.2.0 

func NotificationOpened(windowID string, notification NotificationEvent) Event

NotificationOpened builds a local-notification opened event.

func NotificationReceived added in v0.2.0 

func NotificationReceived(windowID string, notification NotificationEvent) Event

NotificationReceived builds a local-notification received event.

func PushOpened added in v0.2.0 

func PushOpened(windowID string, push PushEvent) Event

PushOpened builds a remote-push opened event.

func PushReceived added in v0.2.0 

func PushReceived(windowID string, push PushEvent) Event

PushReceived builds a remote-push received event.

type EventKind 

type EventKind string

EventKind identifies a host-originated shell event. 

const (
	EventMenuItemSelected     EventKind = "menu.item_selected"
	EventDeepLinkOpened       EventKind = "deep_link.opened"
	EventFilesOpened          EventKind = "files.opened"
	EventNotificationReceived EventKind = "notification.received"
	EventNotificationOpened   EventKind = "notification.opened"
	EventPushReceived         EventKind = "push.received"
	EventPushOpened           EventKind = "push.opened"
)

type EventStream 

type EventStream struct {
	// contains filtered or unexported fields
}

EventStream delivers host-originated shell events to subscribers in order.

func NewEventStream 

func NewEventStream(capacity int) *EventStream

NewEventStream constructs an event stream with a bounded replay buffer.

func (*EventStream) Publish 

func (s *EventStream) Publish(event Event)

Publish records and broadcasts an event.

func (*EventStream) Subscribe 

func (s *EventStream) Subscribe(handler func(Event)) (unsubscribe func())

Subscribe registers a handler and replays the recent buffered events in order.

type FileDialogOptions 

type FileDialogOptions struct {
	Title             string   `json:"title,omitempty"`
	Prompt            string   `json:"prompt,omitempty"`
	DefaultPath       string   `json:"defaultPath,omitempty"`
	SuggestedName     string   `json:"suggestedName,omitempty"`
	AllowedFileTypes  []string `json:"allowedFileTypes,omitempty"`
	AllowsMultiple    bool     `json:"allowsMultiple,omitempty"`
	AllowsDirectories bool     `json:"allowsDirectories,omitempty"`
	AllowsFiles       bool     `json:"allowsFiles,omitempty"`
	CreateDirectories bool     `json:"createDirectories,omitempty"`
}

FileDialogOptions configures open/save panels.

type FileDialogResult 

type FileDialogResult struct {
	Paths []string `json:"paths,omitempty"`
}

FileDialogResult contains file paths chosen by the user.

type FilesEvent 

type FilesEvent struct {
	Paths []string `json:"paths,omitempty"`
}

FilesEvent reports that one or more local files were opened via the host shell.

type IAPEntitlementsResult added in v0.2.0 

type IAPEntitlementsResult struct {
	Entitlements []IAPTransaction `json:"entitlements,omitempty"`
}

IAPEntitlementsResult returns the active entitlements visible to the native host.

type IAPManageSubscriptionsResult added in v0.2.0 

type IAPManageSubscriptionsResult struct {
	Opened bool `json:"opened,omitempty"`
}

IAPManageSubscriptionsResult reports whether the native host opened subscription management UI.

type IAPProduct added in v0.2.0 

type IAPProduct struct {
	ProductID           string `json:"productId,omitempty"`
	DisplayName         string `json:"displayName,omitempty"`
	Description         string `json:"description,omitempty"`
	DisplayPrice        string `json:"displayPrice,omitempty"`
	CurrencyCode        string `json:"currencyCode,omitempty"`
	ProductType         string `json:"productType,omitempty"`
	SubscriptionGroupID string `json:"subscriptionGroupId,omitempty"`
}

IAPProduct describes a StoreKit product surfaced through the native shell.

type IAPProductQueryOptions added in v0.2.0 

type IAPProductQueryOptions struct {
	ProductIDs []string `json:"productIds,omitempty"`
}

IAPProductQueryOptions configures a StoreKit product query.

type IAPProductsQueryResult added in v0.2.0 

type IAPProductsQueryResult struct {
	Products          []IAPProduct `json:"products,omitempty"`
	MissingProductIDs []string     `json:"missingProductIds,omitempty"`
}

IAPProductsQueryResult returns the products resolved by the native StoreKit host.

type IAPPurchaseOptions added in v0.2.0 

type IAPPurchaseOptions struct {
	ProductID       string `json:"productId,omitempty"`
	AppAccountToken string `json:"appAccountToken,omitempty"`
}

IAPPurchaseOptions configures a StoreKit purchase request.

type IAPPurchaseResult added in v0.2.0 

type IAPPurchaseResult struct {
	Status      string          `json:"status,omitempty"`
	ProductID   string          `json:"productId,omitempty"`
	Transaction *IAPTransaction `json:"transaction,omitempty"`
}

IAPPurchaseResult returns the outcome of a StoreKit purchase attempt.

type IAPTransaction added in v0.2.0 

type IAPTransaction struct {
	ProductID             string `json:"productId,omitempty"`
	TransactionID         string `json:"transactionId,omitempty"`
	OriginalTransactionID string `json:"originalTransactionId,omitempty"`
	OwnershipType         string `json:"ownershipType,omitempty"`
	Environment           string `json:"environment,omitempty"`
	PurchaseDate          string `json:"purchaseDate,omitempty"`
	ExpirationDate        string `json:"expirationDate,omitempty"`
	RevocationDate        string `json:"revocationDate,omitempty"`
}

IAPTransaction describes a normalized StoreKit transaction or entitlement. 

type Menu struct {
	Sections []MenuSection `json:"sections,omitempty"`
}

Menu describes the native application menu. 

type MenuEvent struct {
	ID string `json:"id"`
}

MenuEvent reports that a native menu item was selected. 

type MenuItem struct {
	ID       string `json:"id"`
	Title    string `json:"title"`
	Shortcut string `json:"shortcut,omitempty"`
	Disabled bool   `json:"disabled,omitempty"`
	Checked  bool   `json:"checked,omitempty"`
}

MenuItem describes a single native menu item. 

type MenuSection struct {
	Title string     `json:"title,omitempty"`
	Items []MenuItem `json:"items,omitempty"`
}

MenuSection groups menu items under a visible title.

type NativeBridgeCapabilityContract added in v0.2.0 

type NativeBridgeCapabilityContract struct {
	Name        Capability `json:"name"`
	Platforms   []string   `json:"platforms"`
	Description string     `json:"description"`
}

NativeBridgeCapabilityContract describes one semantic native shell capability.

type NativeBridgeContractArtifact added in v0.2.0 

type NativeBridgeContractArtifact struct {
	SchemaVersion string                           `json:"schema_version"`
	Capabilities  []NativeBridgeCapabilityContract `json:"capabilities"`
	Commands      []NativeBridgeMessageContract    `json:"commands"`
	Requests      []NativeBridgeMessageContract    `json:"requests"`
	Events        []NativeBridgeEventContract      `json:"events"`
}

NativeBridgeContractArtifact is the machine-readable native shell contract.

func NativeBridgeContract added in v0.2.0 

func NativeBridgeContract() NativeBridgeContractArtifact

NativeBridgeContract returns a defensive copy of Vango's native shell contract.

type NativeBridgeEventContract added in v0.2.0 

type NativeBridgeEventContract struct {
	Kind        EventKind `json:"kind"`
	Platforms   []string  `json:"platforms"`
	PayloadKey  string    `json:"payload_key"`
	PayloadType string    `json:"payload_type"`
	Description string    `json:"description"`
}

NativeBridgeEventContract describes a native-to-app event.

type NativeBridgeMessageContract added in v0.2.0 

type NativeBridgeMessageContract struct {
	Kind         string     `json:"kind"`
	Capability   Capability `json:"capability,omitempty"`
	Platforms    []string   `json:"platforms"`
	PayloadType  string     `json:"payload_type"`
	ResponseType string     `json:"response_type,omitempty"`
	Description  string     `json:"description"`
}

NativeBridgeMessageContract describes an app-to-native command or request.

type Notification 

type Notification struct {
	Title      string `json:"title"`
	Subtitle   string `json:"subtitle,omitempty"`
	Body       string `json:"body,omitempty"`
	Identifier string `json:"identifier,omitempty"`
}

Notification describes a user-visible native notification.

type NotificationEvent added in v0.2.0 

type NotificationEvent = PushEvent

NotificationEvent reports a local notification lifecycle event emitted by the native host.

type PushEvent added in v0.2.0 

type PushEvent struct {
	NotificationID string         `json:"notificationId,omitempty"`
	ActionID       string         `json:"actionId,omitempty"`
	Title          string         `json:"title,omitempty"`
	Subtitle       string         `json:"subtitle,omitempty"`
	Body           string         `json:"body,omitempty"`
	Route          string         `json:"route,omitempty"`
	URL            string         `json:"url,omitempty"`
	Payload        map[string]any `json:"payload,omitempty"`
}

PushEvent reports a remote notification lifecycle event emitted by the native host.

type RelayError 

type RelayError struct {
	Code    string `json:"code,omitempty"`
	Message string `json:"message,omitempty"`
}

RelayError describes a typed relay failure.

func (*RelayError) Error 

func (e *RelayError) Error() string

type RelayMessage 

type RelayMessage struct {
	ID       string           `json:"id,omitempty"`
	Kind     RelayMessageKind `json:"kind,omitempty"`
	WindowID string           `json:"windowID,omitempty"`
	Name     string           `json:"name,omitempty"`
	Payload  json.RawMessage  `json:"payload,omitempty"`
	Error    *RelayError      `json:"error,omitempty"`
}

RelayMessage is the topology-neutral shell RPC envelope used by hosted shells.

func RelayEvent 

func RelayEvent(windowID string, event Event) (RelayMessage, error)

RelayEvent builds a host-originated event relay message.

func RelayFromCommand 

func RelayFromCommand(id, windowID string, cmd Command) RelayMessage

RelayFromCommand converts a fire-and-forget shell command into a relay message.

func RelayFromRequest 

func RelayFromRequest(id, windowID string, req Request) RelayMessage

RelayFromRequest converts a blocking shell request into a relay message.

func RelayResponse 

func RelayResponse(id, windowID, name string, payload json.RawMessage, err *RelayError) RelayMessage

RelayResponse builds a response relay message for the given id/name.

func (RelayMessage) Clone 

func (m RelayMessage) Clone() RelayMessage

Clone returns a deep copy of the relay message.

func (RelayMessage) DecodePayload 

func (m RelayMessage) DecodePayload(dst any) error

DecodePayload decodes the message payload into dst.

type RelayMessageKind 

type RelayMessageKind string

RelayMessageKind identifies the direction and semantics of a shell relay message. 

const (
	RelayMessageCommand  RelayMessageKind = "command"
	RelayMessageRequest  RelayMessageKind = "request"
	RelayMessageResponse RelayMessageKind = "response"
	RelayMessageEvent    RelayMessageKind = "event"
)

type RelayReceiver 

type RelayReceiver interface {
	HandleRelayMessage(RelayMessage) error
}

RelayReceiver consumes relay responses and host-originated shell events.

type RemotePushRegistrationOptions added in v0.2.0 

type RemotePushRegistrationOptions struct {
	Alerts      bool `json:"alerts,omitempty"`
	Badges      bool `json:"badges,omitempty"`
	Sounds      bool `json:"sounds,omitempty"`
	Provisional bool `json:"provisional,omitempty"`
}

RemotePushRegistrationOptions configures an APNs registration request.

type RemotePushRegistrationResult added in v0.2.0 

type RemotePushRegistrationResult struct {
	Status              string `json:"status,omitempty"`
	DeviceToken         string `json:"deviceToken,omitempty"`
	Environment         string `json:"environment,omitempty"`
	AuthorizationStatus string `json:"authorizationStatus,omitempty"`
	AlertsEnabled       bool   `json:"alertsEnabled,omitempty"`
	BadgesEnabled       bool   `json:"badgesEnabled,omitempty"`
	SoundsEnabled       bool   `json:"soundsEnabled,omitempty"`
}

RemotePushRegistrationResult returns the current APNs registration outcome.

type Request 

type Request struct {
	Kind    RequestKind     `json:"kind"`
	Payload json.RawMessage `json:"payload,omitempty"`
}

Request is a serialized shell request envelope.

func CurrentIAPEntitlements added in v0.2.0 

func CurrentIAPEntitlements() Request

CurrentIAPEntitlements builds a StoreKit entitlement refresh request.

func ManageIAPSubscriptions added in v0.2.0 

func ManageIAPSubscriptions() Request

ManageIAPSubscriptions builds a StoreKit manage-subscriptions request.

func OpenFileDialog 

func OpenFileDialog(options FileDialogOptions) Request

OpenFileDialog builds a file open request.

func PurchaseIAP added in v0.2.0 

func PurchaseIAP(options IAPPurchaseOptions) Request

PurchaseIAP builds a StoreKit purchase request.

func QueryIAPProducts added in v0.2.0 

func QueryIAPProducts(options IAPProductQueryOptions) Request

QueryIAPProducts builds a StoreKit product query request.

func ReadClipboardText 

func ReadClipboardText() Request

ReadClipboardText builds a clipboard read request.

func RegisterRemotePush added in v0.2.0 

func RegisterRemotePush(options RemotePushRegistrationOptions) Request

RegisterRemotePush builds an APNs registration request.

func RestoreIAP added in v0.2.0 

func RestoreIAP() Request

RestoreIAP builds a StoreKit restore request.

func SaveFileDialog 

func SaveFileDialog(options FileDialogOptions) Request

SaveFileDialog builds a file save request.

func SignInWithApple added in v0.2.0 

func SignInWithApple(options SignInWithAppleOptions) Request

SignInWithApple builds a native Apple sign-in request.

type RequestKind 

type RequestKind string

RequestKind identifies a blocking or user-mediated shell request. 

const (
	RequestOpenFileDialog     RequestKind = "dialog.open_file"
	RequestSaveFileDialog     RequestKind = "dialog.save_file"
	RequestReadClipboard      RequestKind = "clipboard.read_text"
	RequestSignInWithApple    RequestKind = "auth.sign_in_with_apple"
	RequestRegisterRemotePush RequestKind = "push.register_remote"
	RequestQueryIAPProducts   RequestKind = "iap.products.query"
	RequestPurchaseIAP        RequestKind = "iap.purchase"
	RequestRestoreIAP         RequestKind = "iap.restore"
	RequestCurrentIAPEnts     RequestKind = "iap.current_entitlements"
	RequestManageIAPSubs      RequestKind = "iap.manage_subscriptions"
)

type Response 

type Response struct {
	Kind    RequestKind     `json:"kind"`
	Payload json.RawMessage `json:"payload,omitempty"`
}

Response is a serialized shell response envelope.

func (Response) DecodeClipboardTextResult 

func (r Response) DecodeClipboardTextResult() (ClipboardTextResult, error)

DecodeClipboardTextResult decodes a clipboard-read response payload.

func (Response) DecodeFileDialogResult 

func (r Response) DecodeFileDialogResult() (FileDialogResult, error)

DecodeFileDialogResult decodes a file-dialog response payload.

func (Response) DecodeIAPEntitlementsResult added in v0.2.0 

func (r Response) DecodeIAPEntitlementsResult() (IAPEntitlementsResult, error)

DecodeIAPEntitlementsResult decodes a StoreKit restore/current-entitlements response payload.

func (Response) DecodeIAPManageSubscriptionsResult added in v0.2.0 

func (r Response) DecodeIAPManageSubscriptionsResult() (IAPManageSubscriptionsResult, error)

DecodeIAPManageSubscriptionsResult decodes a StoreKit manage-subscriptions response payload.

func (Response) DecodeIAPProductsQueryResult added in v0.2.0 

func (r Response) DecodeIAPProductsQueryResult() (IAPProductsQueryResult, error)

DecodeIAPProductsQueryResult decodes a StoreKit product query response payload.

func (Response) DecodeIAPPurchaseResult added in v0.2.0 

func (r Response) DecodeIAPPurchaseResult() (IAPPurchaseResult, error)

DecodeIAPPurchaseResult decodes a StoreKit purchase response payload.

func (Response) DecodeJSON 

func (r Response) DecodeJSON(dst any) error

DecodeJSON decodes a shell response into the provided destination.

func (Response) DecodeRemotePushRegistrationResult added in v0.2.0 

func (r Response) DecodeRemotePushRegistrationResult() (RemotePushRegistrationResult, error)

DecodeRemotePushRegistrationResult decodes an APNs registration response payload.

func (Response) DecodeSignInWithAppleResult added in v0.2.0 

func (r Response) DecodeSignInWithAppleResult() (SignInWithAppleResult, error)

DecodeSignInWithAppleResult decodes a native Sign in with Apple response payload.

type SignInWithAppleOptions added in v0.2.0 

type SignInWithAppleOptions struct {
	Scopes []SignInWithAppleScope `json:"scopes,omitempty"`
	Nonce  string                 `json:"nonce,omitempty"`
	State  string                 `json:"state,omitempty"`
}

SignInWithAppleOptions configures a native Sign in with Apple request.

type SignInWithAppleResult added in v0.2.0 

type SignInWithAppleResult struct {
	UserID                  string                 `json:"userId,omitempty"`
	IdentityToken           string                 `json:"identityToken,omitempty"`
	IdentityTokenBase64     string                 `json:"identityTokenBase64,omitempty"`
	AuthorizationCode       string                 `json:"authorizationCode,omitempty"`
	AuthorizationCodeBase64 string                 `json:"authorizationCodeBase64,omitempty"`
	Email                   string                 `json:"email,omitempty"`
	GivenName               string                 `json:"givenName,omitempty"`
	FamilyName              string                 `json:"familyName,omitempty"`
	State                   string                 `json:"state,omitempty"`
	AuthorizedScopes        []SignInWithAppleScope `json:"authorizedScopes,omitempty"`
	RealUserStatus          string                 `json:"realUserStatus,omitempty"`
}

SignInWithAppleResult returns the credential payload emitted by the native iOS shell.

type SignInWithAppleScope added in v0.2.0 

type SignInWithAppleScope string

SignInWithAppleScope identifies an Apple ID scope requested from the native shell. 

const (
	SignInWithAppleScopeEmail    SignInWithAppleScope = "email"
	SignInWithAppleScopeFullName SignInWithAppleScope = "full_name"
)

type Size 

type Size struct {
	Width  float64 `json:"width"`
	Height float64 `json:"height"`
}

Size describes a shell-controlled window size in device-independent points.

type UnsupportedError 

type UnsupportedError struct {
	Operation string
}

UnsupportedError reports that a shell bridge or capability is unavailable.

func (*UnsupportedError) Error 

func (e *UnsupportedError) Error() string

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