@mlightcad/data-model/lib/database/AcDbSysVarManager.d.ts

The data-model package provides the core classes for interacting with AutoCAD's database and entities. This package mimics AutoCAD ObjectARX's AcDb (Database) classes and implements the drawing database structure that AutoCAD developers are familiar with.

import { AcCmEventManager } from '@mlightcad/common';
import { AcGePointLike } from '@mlightcad/geometry-engine';
/**
 * Supported AutoCAD system variable data type name.
 */
export type AcDbSysVarTypeName = 'string' | 'number' | 'boolean' | 'point' | 'unknown';
/**
 * Supported AutoCAD system variable data type name.
 */
export type AcDbSysVarType = string | number | boolean | AcGePointLike;
/**
 * Definition for a system variable in our registry.
 */
export interface AcDbSysVarDescriptor {
    /** System variable name, e.g., "CLAYER" */
    name: string;
    /** Expected variable type */
    type: AcDbSysVarTypeName;
    /** Optional description (documentation) */
    description?: string;
    /** Optional default value */
    defaultValue?: AcDbSysVarType;
}
/**
 * Event arguments for system variable related events.
 */
export interface AcDbSysVarEventArgs {
    /** The system variable name */
    name: string;
    /** The new value of system variable */
    newVal: AcDbSysVarType;
    /** The old value of system variable */
    oldVal?: AcDbSysVarType;
}
/**
 * Main manager responsible for:
 * - registry of known system variables
 * - caching values
 * - invoking backend getVar/setVar
 * - dispatching sysvar change events
 */
export declare class AcDbSysVarManager {
    private static _instance;
    /** Singleton accessor */
    static instance(): AcDbSysVarManager;
    /** Registered system variable metadata */
    private registry;
    /** Cached current values */
    private cache;
    /** System variable related events */
    readonly events: {
        /**
         * Fired after a system variable is changed directly through the SETVAR command or
         * by entering the variable name at the command line.
         */
        sysVarChanged: AcCmEventManager<AcDbSysVarEventArgs>;
    };
    private constructor();
    /**
     * Register one system variable metadata entry.
     */
    registerVar(desc: AcDbSysVarDescriptor): void;
    /**
     * Register many system variables.
     */
    registerMany(vars: AcDbSysVarDescriptor[]): void;
    /**
     * Get system variable value.
     */
    getVar(name: string): AcDbSysVarType | undefined;
    /**
     * Set system variable value.
     */
    setVar(name: string, value: AcDbSysVarType): void;
    /**
     * Get system variable metadata descriptor (if registered).
     */
    getDescriptor(name: string): AcDbSysVarDescriptor | undefined;
    /**
     * Get all registered system variable descriptors.
     */
    getAllDescriptors(): AcDbSysVarDescriptor[];
    /**
     * Parse one string as one boolean value with case-insensitive by ignoring extra spaces
     * - "true" / "false"
     * - "t" / "f"
     * - "1" / "0"
     * - "yes" / "no"
     * - "y" / "n"
     * @param value - One string
     * @returns - The parsed boolean value
     */
    private parseBoolean;
}
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