npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@bplok20010/viewbox

v0.5.2

Published

a tool class for matrix transformation of views (rotate, scale, translate, skew, etc.)

Downloads

26

Readme

ViewBox

一个对视图进行矩阵变换(旋转、缩放、平移、斜切等)的工具类

Install

npm install @bplok20010/viewbox

Usage

import { ViewBox } from "@bplok20010/viewbox";

const viewBox = new ViewBox({
  transformOrigin: {
    x: 100,
    y: 100,
  },
});

viewBox.setZoom(2);
viewBox.rotate(30);
viewBox.flipX();
viewBox.translate(200, 200);

console.log(viewBox.toCSS());
console.log(viewBox.getTransform());

types

import { Matrix2D } from "matrix2d.js";
import type { IPoint, IRect, ISize } from "./types";
export interface Transform {
  a: number;
  b: number;
  c: number;
  d: number;
  x: number;
  y: number;
  scaleX: number;
  scaleY: number;
  rotation: number;
  flipX: boolean;
  flipY: boolean;
  skewX: number;
  skewY: number;
}

export interface IZoomToRectOptions {
  /**
   * 基于指定矩阵重置再进行缩放
   */
  matrix?: [number, number, number, number, number, number];
  /**
   * 视图宽高,默认400x400
   */
  viewBoxSize?: ISize;
  /**
   * 自定义缩放值,优先级高于objectFit
   */
  scale?: number;
  /**
   * 5种缩放模式,默认:contain
   * https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit
   *
   */
  objectFit?: "fill" | "contain" | "cover" | "none" | "scale-down";
  /**
   * 相对视图的边界距离
   */
  padding?: number;
  /**
   * 自定义缩放中心坐标
   */
  transformOrigin?: IPoint;
}

export interface IViewBoxOptions {
  transform?: Partial<Transform>;
  transformOrigin?: IPoint;
}
/**
 * ViewBox
 */
export declare class ViewBox {
  protected options: IViewBoxOptions;
  protected _matrix: Matrix2D;
  protected _transform: Transform;
  protected transformOrigin: IPoint;
  protected get matrix(): Matrix2D;
  protected set matrix(mtx: Matrix2D);
  protected get transform(): Transform;
  protected set transform(value: Partial<Transform>);
  constructor(options?: IViewBoxOptions);
  protected decompose(): import("matrix2d.js").Transform;
  protected get cx(): number;
  protected get cy(): number;
  setTransformOrigin(x: number, y: number): void;
  getTransformOrigin(): {
    x: number;
    y: number;
  };
  get x(): number;
  set x(value: number);
  get y(): number;
  set y(value: number);
  getPosition(): {
    x: number;
    y: number;
  };
  setPosition(x: number, y: number): this;
  getTransform(): {
    a: number;
    b: number;
    c: number;
    d: number;
    x: number;
    y: number;
    scaleX: number;
    scaleY: number;
    rotation: number;
    flipX: boolean;
    flipY: boolean;
    skewX: number;
    skewY: number;
  };
  setTransform(transform: Partial<Transform>): this;
  getMatrixObject(): Matrix2D;
  getMatrix(): [a: number, b: number, c: number, d: number, tx: number, ty: number];
  /**
   * 绝对坐标(相对viewBox)转本地坐标(viewBox内容实际坐标)
   * @examples
   * viewBox.translate(100, 100)
   * viewBox.globalToLocal(0, 0) // {x: -100, y: -100}
   */
  globalToLocal(x: number, y: number): import("matrix2d.js").Point;
  /**
   * 本地坐标(viewBox内容实际坐标)转绝对坐标(相对viewBox)
   * @examples
   * viewBox.translate(100, 100)
   * viewBox.localToGlobal(-100, -100) // {x: 0, y: 0}
   */
  localToGlobal(x: number, y: number): import("matrix2d.js").Point;
  /**
   * 对viewBox内容进行平移
   * @param x 相对viewBox的(绝对坐标)x偏移量
   * @param y 同上 y偏移量
   * @returns
   */
  translate(x: number, y: number): this;
  translateX(x: number): this;
  translateY(y: number): this;
  /**
   * 对viewBox内容进行缩放,cx,cy均指相对viewBox(绝对坐标)
   * 缩放值scaleX 和 scaleY 叠加上一个缩放值,eg: scale(2,2) scale(3,3) 实际缩放内容为:x、y都缩放了6倍
   * @param scaleX
   * @param scaleY
   */
  scale(scaleX: number, scaleY: number): ViewBox;
  scale(scaleX: number, scaleY: number, cx: number, cy: number): ViewBox;
  /**
   * 对viewBox内容进行旋转,cx,cy均指相对viewBox(绝对坐标)
   * @param rotation 需要旋转的角度,该值会和上一次选择值叠加,eg: rotate(10) rotate(10),实际旋转角度为:20
   */
  rotate(rotation: number): ViewBox;
  rotate(rotation: number, cx: number, cy: number): ViewBox;
  /**
   * x 轴翻转,多次调用侧反复翻转
   * cx,cy均指相对viewBox(绝对坐标)
   */
  flipX(): ViewBox;
  flipX(cx: number, cy: number): ViewBox;
  /**
   * y 轴翻转,多次调用侧反复翻转
   * cx,cy均指相对viewBox(绝对坐标)
   */
  flipY(): ViewBox;
  flipY(cx: number, cy: number): ViewBox;
  skewX(value: number): ViewBox;
  skewX(value: number, cx: number, cy: number): ViewBox;
  /**
   * 注意:如果有初始矩阵系数尽量不要使用该API
   */
  setSkewX(value: number): ViewBox;
  setSkewX(value: number, cx: number, cy: number): ViewBox;
  skewY(value: number): ViewBox;
  skewY(value: number, cx: number, cy: number): ViewBox;
  /**
   * 注意:如果有初始矩阵系数尽量不要使用该API
   */
  setSkewY(value: number): ViewBox;
  setSkewY(value: number, cx: number, cy: number): ViewBox;
  /**
   * 获取当前缩放值
   * @returns
   */
  getZoom(): number;
  /**
   * 视图缩放,该缩放值是全量值,多次调用会覆盖上一次,如:setZoom(2) setZoom(4),实际的缩放值为:4
   * 注意:如果有初始矩阵系数尽量不要使用该API
   * @param value 缩放值,全量值
   */
  setZoom(value: number): ViewBox;
  setZoom(value: number, cx: number, cy: number): ViewBox;
  /**
   * 视图旋转,该缩放值是全量值,多次调用会覆盖上一次,如:setRotation(10) setZoom(30),实际的缩放值为:30
   * 注意:如果有初始矩阵系数尽量不要使用该API
   * @param value 旋转角度,全量值
   */
  setRotation(rotation: number): ViewBox;
  setRotation(rotation: number, cx: number, cy: number): ViewBox;
  /**
   * 缩放以显示指定矩形区域(基于视图的区域)内容,并将区域中心移动到指定的坐标(transformOrigin)
   * @param rect
   */
  zoomToRect(rect: IRect, options?: IZoomToRectOptions): this;
  /**
   * 缩放以居中显示指定矩形区域内容
   * @returns
   */
  zoomToFit(rect: IRect, options?: Omit<IZoomToRectOptions, "transformOrigin">): this;
  reset(): this;
  toCSS(): string;
  clone(): ViewBox;
}

Dev

yarn

# ./examples
yarn start

# publish
yarn release