# all files / src/widgets/ OutlineOptionWidget.js

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     /**
     * OutlineOptionWidget is an item in an {@link OO.ui.OutlineSelectWidget OutlineSelectWidget}.
     *
     * Currently, this class is only used by {@link OO.ui.BookletLayout booklet layouts}, which contain
     * {@link OO.ui.PageLayout page layouts}. See {@link OO.ui.BookletLayout BookletLayout}
     * for an example.
     *
     * @class
     * @extends OO.ui.DecoratedOptionWidget
     *
     * @constructor
     * @param {Object} [config] Configuration options
     * @cfg {number} [level] Indentation level
     * @cfg {boolean} [movable] Allow modification from {@link OO.ui.OutlineControlsWidget outline controls}.
     */
    OO.ui.OutlineOptionWidget = function OoUiOutlineOptionWidget( config ) {
    	// Configuration initialization
    	config = config || {};

    	// Parent constructor
    	OO.ui.OutlineOptionWidget.parent.call( this, config );

    	// Properties
    	this.level = 0;
    	this.movable = !!config.movable;
    	this.removable = !!config.removable;

    	// Initialization
    	this.$element.addClass( 'oo-ui-outlineOptionWidget' );
    	this.setLevel( config.level );
    };

    /* Setup */

    OO.inheritClass( OO.ui.OutlineOptionWidget, OO.ui.DecoratedOptionWidget );

    /* Static Properties */

    /**
     * @static
     * @inheritdoc
     */
    OO.ui.OutlineOptionWidget.static.highlightable = true;

    /**
     * @static
     * @inheritdoc
     */
    OO.ui.OutlineOptionWidget.static.scrollIntoViewOnSelect = true;

    /**
     * @static
     * @inheritable
     * @property {string}
     */
    OO.ui.OutlineOptionWidget.static.levelClass = 'oo-ui-outlineOptionWidget-level-';

    /**
     * @static
     * @inheritable
     * @property {number}
     */
    OO.ui.OutlineOptionWidget.static.levels = 3;

    /* Methods */

    /**
     * Check if item is movable.
     *
     * Movability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
     *
     * @return {boolean} Item is movable
     */
    OO.ui.OutlineOptionWidget.prototype.isMovable = function () {
    	return this.movable;
    };

    /**
     * Check if item is removable.
     *
     * Removability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
     *
     * @return {boolean} Item is removable
     */
    OO.ui.OutlineOptionWidget.prototype.isRemovable = function () {
    	return this.removable;
    };

    /**
     * Get indentation level.
     *
     * @return {number} Indentation level
     */
    OO.ui.OutlineOptionWidget.prototype.getLevel = function () {
    	return this.level;
    };

    /**
     * @inheritdoc
     */
    OO.ui.OutlineOptionWidget.prototype.setPressed = function ( state ) {
    	OO.ui.OutlineOptionWidget.parent.prototype.setPressed.call( this, state );
    	return this;
    };

    /**
     * Set movability.
     *
     * Movability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
     *
     * @param {boolean} movable Item is movable
     * @chainable
     */
    OO.ui.OutlineOptionWidget.prototype.setMovable = function ( movable ) {
    	this.movable = !!movable;
    	this.updateThemeClasses();
    	return this;
    };

    /**
     * Set removability.
     *
     * Removability is used by {@link OO.ui.OutlineControlsWidget outline controls}.
     *
     * @param {boolean} removable Item is removable
     * @chainable
     */
    OO.ui.OutlineOptionWidget.prototype.setRemovable = function ( removable ) {
    	this.removable = !!removable;
    	this.updateThemeClasses();
    	return this;
    };

    /**
     * @inheritdoc
     */
    OO.ui.OutlineOptionWidget.prototype.setSelected = function ( state ) {
    	OO.ui.OutlineOptionWidget.parent.prototype.setSelected.call( this, state );
    	return this;
    };

    /**
     * Set indentation level.
     *
     * @param {number} [level=0] Indentation level, in the range of [0,#maxLevel]
     * @chainable
     */
    OO.ui.OutlineOptionWidget.prototype.setLevel = function ( level ) {
    	var levels = this.constructor.static.levels,
    		levelClass = this.constructor.static.levelClass,
    		i = levels;

    	this.level = level ? Math.max( 0, Math.min( levels - 1, level ) ) : 0;
    	while ( i-- ) {
    		if ( this.level === i ) {
    			this.$element.addClass( levelClass + i );
    		} else {
    			this.$element.removeClass( levelClass + i );
    		}
    	}
    	this.updateThemeClasses();

    	return this;
    };