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When suspending with ctrl+z, the suspend keybinding handler disengages the screen and then sends SIGSTOP to the process group, so the UI thread freezes at the return from kill(2) with the handler's follow-up flush still pending. When fg continues the process, that pending flush races the SIGCONT handler's Resume. If the flush wins, Show() draws against the disengaged screen, whose cell buffer tcell has released to 0x0 while its width/height still hold the old size; drawCell() then reports width 0 for the out-of-range cell, the draw loop's 'x += width - 1' never advances, and the UI thread spins forever while holding the tcell screen lock. Resume in turn blocks forever on that lock, so the screen never re-engages and no input is ever read again: the hard stall of #5309, only recoverable by killing the process. Guard both flush paths with the suspended flag. For the flag to guarantee that the screen is engaged whenever it is false, Resume must clear it only after re-engaging (it used to clear it before); Suspend already sets it before disengaging. This also covers the pre-existing unsynchronized suspended check in draw(), which is subsumed by the guards and can go. The regression test cannot use the demonstrate-then-fix pattern: on unfixed code the flush goroutine spins holding the screen lock, which deadlocks any subsequent screen call including the test cleanup's Close(). |
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|---|---|---|
| .. | ||
| attribute.go | ||
| AUTHORS | ||
| block_events_test.go | ||
| CHANGES_tcell.md | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| doc.go | ||
| edit.go | ||
| escape.go | ||
| escape_test.go | ||
| flush_test.go | ||
| gui.go | ||
| gui_others.go | ||
| gui_windows.go | ||
| key.go | ||
| keybinding.go | ||
| LICENSE | ||
| README.md | ||
| scrollbar.go | ||
| scrollbar_test.go | ||
| suspend_test.go | ||
| task.go | ||
| task_manager.go | ||
| task_manager_test.go | ||
| tcell_driver.go | ||
| text_area.go | ||
| text_area_test.go | ||
| user_event_queue_test.go | ||
| view.go | ||
| view_test.go | ||
GOCUI - Go Console User Interface
Minimalist Go package aimed at creating Console User Interfaces. A community fork based on the amazing work of jroimartin
Features
- Minimalist API.
- Views (the "windows" in the GUI) implement the interface io.ReadWriter.
- Support for overlapping views.
- The GUI can be modified at runtime (concurrent-safe).
- Global and view-level keybindings.
- Mouse support.
- Colored text.
- Customizable editing mode.
- Easy to build reusable widgets, complex layouts...
About fork
This fork has many improvements over the original work from jroimartin.
- Written ontop of TCell
- Better wide character support
- Support for 1 Line height views
- Better support for running in docker container
- Customize frame colors
- Improved code comments and quality
- Many small improvements
- Change Visibility of views
For information about this org see: awesome-gocui/about.
Installation
Execute:
$ go get github.com/awesome-gocui/gocui
Documentation
Execute:
$ go doc github.com/awesome-gocui/gocui
Or visit godoc.org to read it online.
Example
See the _example folder for more examples
package main
import (
"fmt"
"log"
"github.com/awesome-gocui/gocui"
)
func main() {
g, err := gocui.NewGui(gocui.OutputNormal, true)
if err != nil {
log.Panicln(err)
}
defer g.Close()
g.SetManagerFunc(layout)
if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
log.Panicln(err)
}
if err := g.MainLoop(); err != nil && !gocui.IsQuit(err) {
log.Panicln(err)
}
}
func layout(g *gocui.Gui) error {
maxX, maxY := g.Size()
if v, err := g.SetView("hello", maxX/2-7, maxY/2, maxX/2+7, maxY/2+2, 0); err != nil {
if !gocui.IsUnknownView(err) {
return err
}
if _, err := g.SetCurrentView("hello"); err != nil {
return err
}
fmt.Fprintln(v, "Hello world!")
}
return nil
}
func quit(g *gocui.Gui, v *gocui.View) error {
return gocui.ErrQuit
}
Screenshots
Projects using gocui
- komanda-cli: IRC Client For Developers.
- vuls: Agentless vulnerability scanner for Linux/FreeBSD.
- wuzz: Interactive cli tool for HTTP inspection.
- httplab: Interactive web server.
- domainr: Tool that checks the availability of domains based on keywords.
- gotime: Time tracker for projects and tasks.
- claws: Interactive command line client for testing websockets.
- terminews: Terminal based RSS reader.
- diagram: Tool to convert ascii arts into hand drawn diagrams.
- pody: CLI app to manage Pods in a Kubernetes cluster.
- kubexp: Kubernetes client.
- kcli: Tool for inspecting kafka topics/partitions/messages.
- fac: git merge conflict resolver
- jsonui: Interactive JSON explorer for your terminal.
- cointop: Interactive terminal based UI application for tracking cryptocurrencies.
- lazygit: simple terminal UI for git commands.
- lazydocker: The lazier way to manage everything docker.
Note: if your project is not listed here, let us know! :)


