95 lines
1.6 KiB
Go
95 lines
1.6 KiB
Go
// Copyright 2017 Zack Guo <zack.y.guo@gmail.com>. All rights reserved.
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// Use of this source code is governed by a MIT license that can
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// be found in the LICENSE file.
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package termui
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import (
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"fmt"
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"sync"
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)
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// event mixins
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type WgtMgr map[string]WgtInfo
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type WgtInfo struct {
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Handlers map[string]func(Event)
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WgtRef Widget
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Id string
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}
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type Widget interface {
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Id() string
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}
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func NewWgtInfo(wgt Widget) WgtInfo {
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return WgtInfo{
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Handlers: make(map[string]func(Event)),
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WgtRef: wgt,
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Id: wgt.Id(),
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}
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}
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func NewWgtMgr() WgtMgr {
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wm := WgtMgr(make(map[string]WgtInfo))
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return wm
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}
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func (wm WgtMgr) AddWgt(wgt Widget) {
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wm[wgt.Id()] = NewWgtInfo(wgt)
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}
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func (wm WgtMgr) RmWgt(wgt Widget) {
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wm.RmWgtById(wgt.Id())
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}
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func (wm WgtMgr) RmWgtById(id string) {
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delete(wm, id)
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}
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func (wm WgtMgr) AddWgtHandler(id, path string, h func(Event)) {
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if w, ok := wm[id]; ok {
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w.Handlers[path] = h
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}
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}
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func (wm WgtMgr) RmWgtHandler(id, path string) {
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if w, ok := wm[id]; ok {
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delete(w.Handlers, path)
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}
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}
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var counter struct {
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sync.RWMutex
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count int
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}
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func GenId() string {
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counter.Lock()
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defer counter.Unlock()
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counter.count += 1
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return fmt.Sprintf("%d", counter.count)
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}
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func (wm WgtMgr) WgtHandlersHook() func(Event) {
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return func(e Event) {
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for _, v := range wm {
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if k := findMatch(v.Handlers, e.Path); k != "" {
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v.Handlers[k](e)
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}
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}
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}
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}
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var DefaultWgtMgr WgtMgr
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func (b *Block) Handle(path string, handler func(Event)) {
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if _, ok := DefaultWgtMgr[b.Id()]; !ok {
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DefaultWgtMgr.AddWgt(b)
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}
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DefaultWgtMgr.AddWgtHandler(b.Id(), path, handler)
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}
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