File Content: platform.base.d.ts /** * @typedef { import('../core/core.controller.js').default } Chart */ /** * Abstract class that allows abstracting platform dependencies away from the chart. */ export default class BasePlatform { /** * Called at chart construction time, returns a context2d instance implementing * the [W3C Canvas 2D Context API standard]{@link https://www.w3.org/TR/2dcontext/}. * @param {HTMLCanvasElement} canvas - The canvas from which to acquire context (platform specific) * @param {number} [aspectRatio] - The chart options */ acquireContext(canvas: HTMLCanvasElement, aspectRatio?: number): void; /** * Called at chart destruction time, releases any resources associated to the context * previously returned by the acquireContext() method. * @param {CanvasRenderingContext2D} context - The context2d instance * @returns {boolean} true if the method succeeded, else false */ releaseContext(context: CanvasRenderingContext2D): boolean; /** * Registers the specified listener on the given chart. * @param {Chart} chart - Chart from which to listen for event * @param {string} type - The ({@link ChartEvent}) type to listen for * @param {function} listener - Receives a notification (an object that implements * the {@link ChartEvent} interface) when an event of the specified type occurs. */ addEventListener(chart: Chart, type: string, listener: Function): void; /** * Removes the specified listener previously registered with addEventListener. * @param {Chart} chart - Chart from which to remove the listener * @param {string} type - The ({@link ChartEvent}) type to remove * @param {function} listener - The listener function to remove from the event target. */ removeEventListener(chart: Chart, type: string, listener: Function): void; /** * @returns {number} the current devicePixelRatio of the device this platform is connected to. */ getDevicePixelRatio(): number; /** * Returns the maximum size in pixels of given canvas element. * @param {HTMLCanvasElement} element * @param {number} [width] - content width of parent element * @param {number} [height] - content height of parent element * @param {number} [aspectRatio] - aspect ratio to maintain */ getMaximumSize(element: HTMLCanvasElement, width?: number, height?: number, aspectRatio?: number): { width: number; height: number; }; /** * @param {HTMLCanvasElement} canvas * @returns {boolean} true if the canvas is attached to the platform, false if not. */ isAttached(canvas: HTMLCanvasElement): boolean; /** * Updates config with platform specific requirements * @param {import('../core/core.config.js').default} config */ updateConfig(config: import('../core/core.config.js').default): void; } export type Chart = import('../core/core.controller.js').default; Submit