type PendingChangesBarProps = {
    hasPendingDrafts: boolean;
    draftStateKey: string;
    onSave: () => void;
    onDiscard: () => void;
    isSaving: boolean;
    saveDisabled: boolean;
    discardDisabled: boolean;
};
type UnsavedChangesDialogProps = {
    open: boolean;
    onClose: () => void;
    onSave: () => void;
    onDiscard: () => void;
    saveDisabled: boolean;
    isSaving: boolean;
};
type CanvasPanelController = {
    projectId: string | null;
    previewUrlWithPreviewToken: URL | null;
    sandboxInstrumented: boolean;
    isInProgress: boolean;
    uiMode: "preview" | "code";
    displayWorkspaceStateOverlay: boolean;
    codeSelectedFile: string | null;
    setCodeSelectedFile: (path: string | null) => void;
    onRequestModeChange: (mode: "preview" | "code") => void;
    pendingChangesBarProps: PendingChangesBarProps;
    unsavedDialogProps: UnsavedChangesDialogProps;
    previewUrl: URL | null;
};
export declare function useCanvasPanelController(): CanvasPanelController;
export {};
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