gf/os/gview/gview_instance.go

// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.

package gview

import "github.com/gogf/gf/v2/container/gmap"

const (
	// DefaultName is the default group name for instance usage.
	DefaultName = "default"
)

var (
	checker = func(v *View) bool { return v == nil }
	// Instances map.
	instances = gmap.NewKVMapWithChecker[string, *View](checker, true)
)

// Instance returns an instance of View with default settings.
// The parameter `name` is the name for the instance.
func Instance(name ...string) *View {
	key := DefaultName
	if len(name) > 0 && name[0] != "" {
		key = name[0]
	}
	return instances.GetOrSetFuncLock(key, func() *View {
		return New()
	})
}