『结构型』桥接模式

package main

import "fmt"

// Platform 是平台接口
type Platform interface {
	DrawCircle(radius int)
	DrawRectangle(width, height int)
}

// WindowsPlatform 是 Windows 平台的实现
type WindowsPlatform struct{}

func (w *WindowsPlatform) DrawCircle(radius int) {
	fmt.Printf("Drawing Circle on Windows platform with radius %d\n", radius)
}

func (w *WindowsPlatform) DrawRectangle(width, height int) {
	fmt.Printf("Drawing Rectangle on Windows platform with width %d and height %d\n", width, height)
}

// LinuxPlatform 是 Linux 平台的实现
type LinuxPlatform struct{}

func (l *LinuxPlatform) DrawCircle(radius int) {
	fmt.Printf("Drawing Circle on Linux platform with radius %d\n", radius)
}

func (l *LinuxPlatform) DrawRectangle(width, height int) {
	fmt.Printf("Drawing Rectangle on Linux platform with width %d and height %d\n", width, height)
}

// Shape 是图形抽象类
type Shape interface {
	Draw()
}

// Circle 是圆形
type Circle struct {
	platform Platform
	radius   int
}

func (c *Circle) Draw() {
	c.platform.DrawCircle(c.radius)
}

// Rectangle 是矩形
type Rectangle struct {
	platform Platform
	width    int
	height   int
}

func (r *Rectangle) Draw() {
	r.platform.DrawRectangle(r.width, r.height)
}

func main() {
	// 在 Windows 平台上绘制圆形
	windowsPlatform := &WindowsPlatform{}
	circle := &Circle{platform: windowsPlatform, radius: 5}
	circle.Draw()

	// 在 Linux 平台上绘制矩形
	linuxPlatform := &LinuxPlatform{}
	rectangle := &Rectangle{platform: linuxPlatform, width: 10, height: 5}
	rectangle.Draw()
}