declare type StyleMap = {
  [key: string]: any;
};

/**
 * @class mxStylesheet
 *
 * Defines the appearance of the cells in a graph. See {@link putCellStyle} for an
 * example of creating a new cell style. It is recommended to use objects, not
 * arrays for holding cell styles. Existing styles can be cloned using
 * {@link mxUtils.clone} and turned into a string for debugging using
 * {@link mxUtils.toString}.
 *
 * ### Default Styles
 *
 * The stylesheet contains two built-in styles, which are used if no style is
 * defined for a cell:
 *
 * - defaultVertex Default style for vertices
 * - defaultEdge Default style for edges
 *
 * ### Example
 *
 * ```javascript
 * var vertexStyle = stylesheet.getDefaultVertexStyle();
 * vertexStyle[mxConstants.STYLE_ROUNDED] = true;
 * var edgeStyle = stylesheet.getDefaultEdgeStyle();
 * edgeStyle[mxConstants.STYLE_EDGE] = mxEdgeStyle.EntityRelation;
 * ```
 *
 * Modifies the built-in default styles.
 *
 * To avoid the default style for a cell, add a leading semicolon
 * to the style definition, eg.
 *
 * ```javascript
 * ;shadow=1
 * ```
 *
 * ### Removing keys
 *
 * For removing a key in a cell style of the form [stylename;|key=value;] the
 * special value none can be used, eg. highlight;fillColor=none
 *
 * See also the helper methods in mxUtils to modify strings of this format,
 * namely {@link mxUtils.setStyle}, {@link mxUtils.indexOfStylename},
 * {@link mxUtils.addStylename}, {@link mxUtils.removeStylename},
 * {@link mxUtils.removeAllStylenames} and {@link mxUtils.setStyleFlag}.
 *
 * Constructor: mxStylesheet
 *
 * Constructs a new stylesheet and assigns default styles.
 */
declare class mxStylesheet {
  constructor();

  /**
   * Maps from names to cell styles. Each cell style is a map of key,
   * value pairs.
   */
  styles: StyleMap;

  /**
   * Creates and returns the default vertex style.
   */
  createDefaultVertexStyle(): StyleMap;

  /**
   * Creates and returns the default edge style.
   */
  createDefaultEdgeStyle(): StyleMap;

  /**
   * Sets the default style for vertices using defaultVertex as the
   * stylename.
   * @param style Key, value pairs that define the style.
   */
  putDefaultVertexStyle(style: StyleMap): void;

  /**
   * Sets the default style for edges using defaultEdge as the stylename.
   */
  putDefaultEdgeStyle(style: StyleMap): void;

  /**
   * Returns the default style for vertices.
   */
  getDefaultVertexStyle(): StyleMap;

  /**
   * Sets the default style for edges.
   */
  getDefaultEdgeStyle(): StyleMap;

  /**
   * Stores the given map of key, value pairs under the given name in
   * {@link styles}.
   *
   * Example:
   *
   * The following example adds a new style called 'rounded' into an
   * existing stylesheet:
   *
   * ```javascript
   * var style = new Object();
   * style[mxConstants.STYLE_SHAPE] = mxConstants.SHAPE_RECTANGLE;
   * style[mxConstants.STYLE_PERIMETER] = mxPerimeter.RectanglePerimeter;
   * style[mxConstants.STYLE_ROUNDED] = true;
   * graph.getStylesheet().putCellStyle('rounded', style);
   * ```
   *
   * In the above example, the new style is an object. The possible keys of
   * the object are all the constants in {@link mxConstants} that start with STYLE
   * and the values are either JavaScript objects, such as
   * {@link mxPerimeter.RightAngleRectanglePerimeter} (which is in fact a function)
   * or expressions, such as true. Note that not all keys will be
   * interpreted by all shapes (eg. the line shape ignores the fill color).
   * The final call to this method associates the style with a name in the
   * stylesheet. The style is used in a cell with the following code:
   *
   * ```javascript
   * model.setStyle(cell, 'rounded');
   * ```
   *
   * @param name Name for the style to be stored.
   * @param style Key, value pairs that define the style.
   */
  putCellStyle(name: string, style: StyleMap): void;

  /**
   * Returns the cell style for the specified stylename or the given
   * defaultStyle if no style can be found for the given stylename.
   *
   * @param name String of the form [(stylename|key=value);] that represents the style.
   * @param defaultStyle Default style to be returned if no style can be found.
   */
  getCellStyle(name: string, defaultStyle?: StyleMap): StyleMap;
}