82 lines
1.5 KiB
Go
82 lines
1.5 KiB
Go
package screen
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import (
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"fmt"
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"os"
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"sync"
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"github.com/zyedidia/micro/internal/config"
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"github.com/zyedidia/tcell"
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)
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// Screen is the tcell screen we use to draw to the terminal
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// Synchronization is used because we poll the screen on a separate
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// thread and sometimes the screen is shut down by the main thread
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// (for example on TermMessage) so we don't want to poll a nil/shutdown
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// screen. TODO: maybe we should worry about polling and drawing at the
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// same time too.
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var Screen tcell.Screen
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var lock sync.Mutex
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var DrawChan chan bool
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func Lock() {
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lock.Lock()
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}
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func Unlock() {
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lock.Unlock()
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}
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func Redraw() {
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DrawChan <- true
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}
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// TempFini shuts the screen down temporarily
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func TempFini() bool {
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screenWasNil := Screen == nil
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if !screenWasNil {
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Screen.Fini()
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Lock()
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Screen = nil
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}
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return screenWasNil
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}
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// TempStart restarts the screen after it was temporarily disabled
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func TempStart(screenWasNil bool) {
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if !screenWasNil {
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Init()
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Unlock()
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}
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}
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// Init creates and initializes the tcell screen
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func Init() {
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DrawChan = make(chan bool, 8)
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// Should we enable true color?
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truecolor := os.Getenv("MICRO_TRUECOLOR") == "1"
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if !truecolor {
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os.Setenv("TCELL_TRUECOLOR", "disable")
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}
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// Initilize tcell
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var err error
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Screen, err = tcell.NewScreen()
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if err != nil {
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fmt.Println(err)
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fmt.Println("Fatal: Micro could not initialize a Screen.")
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os.Exit(1)
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}
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if err = Screen.Init(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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if config.GetGlobalOption("mouse").(bool) {
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Screen.EnableMouse()
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}
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}
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