import { AcApContext } from '../../app';
import { AcEdCommand } from '../../editor';
/**
 * AutoCAD-like `LAYISO` command.
 *
 * The command isolates the layers of selected objects. Non-isolated layers are
 * either turned off or locked, depending on the persisted `Settings` choice.
 *
 * Current viewer limitations:
 * - Per-viewport layer freezing is not represented, so `Vpfreeze` falls back to
 *   global layer-off behavior.
 * - Locked-layer fading is not rendered, so `Lock and fade` falls back to
 *   locking non-isolated layers without changing their visibility.
 */
export declare class AcApLayerIsoCmd extends AcEdCommand {
    private static _settings;
    private _vpfreezeHintShown;
    private _lockFadeHintShown;
    /**
     * Creates a write-enabled `LAYISO` command instance.
     */
    constructor();
    /**
     * Runs the isolate-layer workflow.
     *
     * Preselected entities are consumed immediately. Otherwise the command keeps
     * prompting until the user either changes settings, selects objects, or
     * cancels the command.
     *
     * @param context - Active application context used to update layer states.
     * @returns Resolves when layer isolation is applied or the command exits.
     */
    execute(context: AcApContext): Promise<void>;
    /**
     * Sends a localized status message through the command-line output.
     *
     * @param message - Text to display to the user.
     * @param type - Visual severity mapped to command-line message styles.
     */
    private notify;
    /**
     * Registers a localized keyword on a prompt.
     *
     * @param prompt - Prompt instance that should expose the keyword.
     * @param key - I18n keyword identifier under `jig.layiso.keywords`.
     */
    private addKeyword;
    /**
     * Prompts for selected entities or the `Settings` keyword.
     *
     * @returns Selection or keyword action, or `undefined` when canceled.
     */
    private promptSelection;
    /**
     * Opens the `Settings` branch for choosing how non-isolated layers behave.
     *
     * @returns Resolves when the setting prompt is dismissed or updated.
     */
    private runSettings;
    /**
     * Prompts for viewport behavior used by the `Off` isolation mode.
     *
     * `Vpfreeze` falls back to ordinary layer-off behavior because the viewer has
     * no per-viewport layer state.
     *
     * @returns Resolves when the prompt is dismissed or the setting is updated.
     */
    private promptOffMode;
    /**
     * Sets or clears the frozen bit while preserving other layer flags.
     *
     * @param layer - Target layer table record.
     * @param frozen - Whether the layer should be marked frozen.
     */
    private setLayerFrozen;
    /**
     * Sets or clears the locked bit while preserving other layer flags.
     *
     * @param layer - Target layer table record.
     * @param locked - Whether the layer should be marked locked.
     */
    private setLayerLocked;
    /**
     * Resolves selected entities to layer names and applies isolation.
     *
     * @param context - Active application context containing database and view.
     * @param objectIds - Entity ids selected by the user.
     */
    private isolateSelectedObjectLayers;
    /**
     * Collects distinct layer names from selected entity ids.
     *
     * @param context - Active application context containing the drawing database.
     * @param objectIds - Selected entity identifiers.
     * @returns Layer names resolved from valid selected entities.
     */
    private collectSelectedLayerNames;
}
//# sourceMappingURL=AcApLayerIsoCmd.d.ts.map