import { AcApContext } from '../../app';
import { AcEdCommand } from '../../editor';
/**
 * AutoCAD-like `LAYFRZ` command.
 *
 * The command repeatedly asks the user to pick an entity and freezes the
 * corresponding layer. It also supports the AutoCAD-style `Settings` and
 * `Undo` branches during the same command session.
 *
 * Current viewer limitations:
 * - Only one global viewport is available, so `Vpfreeze` behaves like
 *   `Freeze`.
 * - Nested block/xref sub-entity picking is not exposed yet, so the block
 *   selection setting is stored for future use but does not currently change
 *   the resolved target layer.
 */
export declare class AcApLayerFreezeCmd extends AcEdCommand {
    private static _settings;
    private _history;
    private _vpfreezeHintShown;
    /**
     * Creates a write-enabled `LAYFRZ` command instance.
     */
    constructor();
    /**
     * Runs the interactive freeze-layer workflow until the user cancels.
     *
     * The command keeps its per-run undo stack in memory and reuses the static
     * settings selected in previous `LAYFRZ` invocations.
     *
     * @param context - Active application context used to read and update the current drawing.
     * @returns Resolves when the command loop ends.
     */
    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 an entity or keyword prompt.
     *
     * @param prompt - Prompt instance that should expose the keyword to the user.
     * @param key - I18n keyword identifier under `jig.layfrz.keywords`.
     */
    private addKeyword;
    /**
     * Prompts for either a picked entity or one of the top-level command keywords.
     *
     * @returns Resolved selection or keyword action, or `undefined` when the user cancels.
     */
    private promptSelection;
    /**
     * Opens the `Settings` branch and keeps prompting until the user exits it.
     *
     * @returns Resolves when the settings submenu is closed.
     */
    private runSettings;
    /**
     * Prompts for the viewport-freeze mode to store for subsequent selections.
     *
     * `Vpfreeze` currently falls back to a global freeze because the viewer does
     * not expose per-viewport layer state.
     *
     * @returns Resolves when the prompt is dismissed or the setting is updated.
     */
    private promptViewportMode;
    /**
     * Prompts for how nested block selections should resolve their target layer.
     *
     * The chosen value is persisted for later use even though nested selection is
     * not yet implemented in the viewer.
     *
     * @returns Resolves when the prompt is dismissed or the setting is updated.
     */
    private promptBlockSelectionMode;
    /**
     * Toggles the frozen flag on a layer table record.
     *
     * @param layer - Layer record to update.
     * @param frozen - Whether the layer should be marked frozen.
     */
    private setLayerFrozen;
    /**
     * Resolves the picked entity's layer and freezes it when allowed.
     *
     * The method validates the selection, prevents freezing the current layer,
     * records undo history, and clears the selection set after a successful edit.
     *
     * @param context - Active application context containing the current database and view.
     * @param objectId - Identifier of the entity selected by the user.
     */
    private freezeEntityLayer;
    /**
     * Restores the most recently frozen layer state captured during this run.
     *
     * @param context - Active application context containing the current database and view.
     */
    private runUndo;
}
//# sourceMappingURL=AcApLayerFreezeCmd.d.ts.map