mirror of https://github.com/gizak/termui.git
137 lines
2.6 KiB
Go
137 lines
2.6 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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"image"
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"runtime/debug"
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"sync"
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tb "github.com/nsf/termbox-go"
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)
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// Bufferer should be implemented by all renderable components.
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type Bufferer interface {
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Buffer() Buffer
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}
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// Init initializes termui library. This function should be called before any others.
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// After initialization, the library must be finalized by 'Close' function.
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func Init() error {
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if err := tb.Init(); err != nil {
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return err
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}
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tb.SetInputMode(tb.InputEsc | tb.InputMouse)
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// DefaultEvtStream = NewEvtStream()
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// sysEvtChs = make([]chan Event, 0)
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// go hookTermboxEvt()
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renderJobs = make(chan []Bufferer)
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//renderLock = new(sync.RWMutex)
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Body = NewGrid()
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Body.X = 0
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Body.Y = 0
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Body.BgColor = ThemeAttr("bg")
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Body.Width = TermWidth()
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Handle("<Resize>", func(e Event) {
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payload := e.Payload.(Resize)
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Body.Width = payload.Width
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})
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DefaultWgtMgr = NewWgtMgr()
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EventHook(DefaultWgtMgr.WgtHandlersHook())
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go func() {
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for bs := range renderJobs {
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render(bs...)
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}
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}()
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return nil
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}
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// Close finalizes termui library,
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// should be called after successful initialization when termui's functionality isn't required anymore.
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func Close() {
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tb.Close()
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}
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var renderLock sync.Mutex
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func termSync() {
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renderLock.Lock()
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tb.Sync()
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termWidth, termHeight = tb.Size()
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renderLock.Unlock()
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}
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// TermWidth returns the current terminal's width.
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func TermWidth() int {
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termSync()
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return termWidth
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}
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// TermHeight returns the current terminal's height.
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func TermHeight() int {
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termSync()
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return termHeight
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}
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// Render renders all Bufferer in the given order from left to right,
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// right could overlap on left ones.
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func render(bs ...Bufferer) {
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defer func() {
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if e := recover(); e != nil {
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Close()
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panic(debug.Stack())
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}
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}()
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for _, b := range bs {
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buf := b.Buffer()
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// set cels in buf
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for p, c := range buf.CellMap {
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if p.In(buf.Area) {
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tb.SetCell(p.X, p.Y, c.Ch, toTmAttr(c.Fg), toTmAttr(c.Bg))
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}
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}
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}
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renderLock.Lock()
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// render
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tb.Flush()
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renderLock.Unlock()
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}
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func Clear() {
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tb.Clear(tb.ColorDefault, toTmAttr(ThemeAttr("bg")))
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}
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func clearArea(r image.Rectangle, bg Attribute) {
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for i := r.Min.X; i < r.Max.X; i++ {
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for j := r.Min.Y; j < r.Max.Y; j++ {
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tb.SetCell(i, j, ' ', tb.ColorDefault, toTmAttr(bg))
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}
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}
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}
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func ClearArea(r image.Rectangle, bg Attribute) {
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clearArea(r, bg)
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tb.Flush()
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}
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var renderJobs chan []Bufferer
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func Render(bs ...Bufferer) {
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//go func() { renderJobs <- bs }()
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renderJobs <- bs
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}
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