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refreshViewLinesIfNeeded re-wrapped every line of the buffer whenever the view was tainted. That's cheap for short content, but scrolling a long diff calls it constantly: adjustDownwardScrollAmount queries ViewLinesHeight on every scroll event, and each newly-read line taints the view, so every notch re-wrapped the entire buffer. Wrapping measures each cell's width (uniseg) and allocates per line, so once you'd scrolled far enough down the diff, scrolling turned sluggish - the cost grew with how much had been read. (A CPU profile of scrolling deep in a long diff put 77% of the time in lineWrap, reached almost entirely via ViewLinesHeight rather than draw.) Cache each line's wrapped result on the lineType, keyed by the width it was wrapped at, and only re-wrap lines that have actually changed since the last refresh. A firstDirtyLine index, updated in the same three places that set `tainted` (write, clearViewLines' callers, SetHighlight), marks the lowest line that might have changed; lines below it with a matching cached width reuse their cached wrapping. The cache lives on the line, so it's freed with the line when the view's content is replaced (e.g. selecting a different commit) - it doesn't accumulate across a session. The wrapping cost per scroll now scales with the number of lines just read, not with the total size of the buffer, so scrolling stays smooth no matter how far down you are. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> |
||
|---|---|---|
| .. | ||
| attribute.go | ||
| AUTHORS | ||
| 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 | ||
| task.go | ||
| task_manager.go | ||
| task_manager_test.go | ||
| tcell_driver.go | ||
| text_area.go | ||
| text_area_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! :)


