/
core.go
126 lines (99 loc) · 2.26 KB
/
core.go
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package core
import (
"time"
termbox "github.com/nsf/termbox-go"
)
const escWaitDuration = 10 * time.Millisecond
type Core struct {
quit bool
ex Executor
win Window
log Logger
ctx *context
cmd *Command
}
func New() *Core {
c := Core{
ex: newExecutor(),
log: newLogger(),
}
c.ctx = &context{
core: &c,
buf: newBuffer(0, 0),
}
return &c
}
func (c *Core) SetExecutor(ex Executor) {
c.ex = ex
}
func (c *Core) SetWindow(win Window) {
c.win = win
}
func (c *Core) SetLogger(log Logger) {
c.log = log
}
func (c *Core) Run() {
if err := termbox.Init(); err != nil {
c.log.Errorf("core: could not initialize termbox: %v", err)
return
}
defer termbox.Close()
if c.win == nil {
panic("core: window cannot be nil")
}
defer c.win.Close(c.newContext())
defer c.ex.Close()
termbox.SetInputMode(termbox.InputEsc | termbox.InputMouse)
termbox.SetOutputMode(termbox.OutputNormal)
for !c.quit {
if c.cmd != nil {
c.ex.Execute(func() { c.win.Command(c.newContext(), *c.cmd) })
c.cmd = nil
}
switch ev := termbox.PollEvent(); ev.Type {
case termbox.EventKey:
if ev.Ch == 0 && ev.Key == termbox.KeyEsc {
next := make(chan termbox.Event, 1)
go func() {
next <- termbox.PollEvent()
}()
select {
case ev = <-next:
ev.Mod |= termbox.ModAlt
case <-time.After(escWaitDuration):
break
}
}
c.ex.Execute(func() { c.win.Key(c.newContext(), newKey(ev)) })
case termbox.EventMouse:
c.ex.Execute(func() { c.win.Mouse(c.newContext(), newMouse(ev)) })
case termbox.EventResize:
c.ex.Execute(func() { c.win.Resize(c.newContext()) })
case termbox.EventInterrupt:
break
case termbox.EventError:
c.log.Errorf("core: polled termbox error event: %v", ev.Err)
default:
c.log.Errorf("core: polled termbox unknown event")
}
}
}
func (c *Core) newContext() *context {
c.ctx.expired = true
c.ctx = &context{
core: c,
buf: c.ctx.buf,
}
cols, rows := termbox.Size()
if c.ctx.buf.Cols != cols || c.ctx.buf.Rows != rows {
buf := newBuffer(cols, rows)
for row := 0; row < c.ctx.buf.Rows && row < buf.Rows; row++ {
for col := 0; col < c.ctx.buf.Cols && col < buf.Cols; col++ {
c := c.ctx.buf.Get(col, row)
buf.Set(col, row, c)
}
}
c.ctx.buf = buf
}
return c.ctx
}