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4adca84d68
We refresh the view after reading just enough to fill it, so that we see the initial content as quickly as possible, but then we continue reading enough lines so that we can tell how long the scrollbar needs to be, and then we refresh again. This can result in slight flicker of the scrollbar when it is first drawn with a bigger size and then jumps to a smaller size; however, that's a good tradeoff for a solution that provides both good speed and accuracy.
89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
//go:build !windows
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// +build !windows
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package gui
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import (
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"io"
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"os"
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"os/exec"
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"strings"
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"github.com/creack/pty"
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"github.com/jesseduffield/gocui"
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"github.com/jesseduffield/lazygit/pkg/utils"
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)
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func (gui *Gui) desiredPtySize() *pty.Winsize {
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width, height := gui.Views.Main.Size()
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return &pty.Winsize{Cols: uint16(width), Rows: uint16(height)}
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}
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func (gui *Gui) onResize() error {
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gui.Mutexes.PtyMutex.Lock()
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defer gui.Mutexes.PtyMutex.Unlock()
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for _, ptmx := range gui.viewPtmxMap {
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// TODO: handle resizing properly: we need to actually clear the main view
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// and re-read the output from our pty. Or we could just re-run the original
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// command from scratch
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if err := pty.Setsize(ptmx, gui.desiredPtySize()); err != nil {
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return utils.WrapError(err)
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}
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}
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return nil
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}
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// Some commands need to output for a terminal to active certain behaviour.
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// For example, git won't invoke the GIT_PAGER env var unless it thinks it's
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// talking to a terminal. We typically write cmd outputs straight to a view,
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// which is just an io.Reader. the pty package lets us wrap a command in a
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// pseudo-terminal meaning we'll get the behaviour we want from the underlying
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// command.
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func (gui *Gui) newPtyTask(view *gocui.View, cmd *exec.Cmd, prefix string) error {
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width, _ := gui.Views.Main.Size()
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pager := gui.git.Config.GetPager(width)
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if pager == "" {
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// if we're not using a custom pager we don't need to use a pty
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return gui.newCmdTask(view, cmd, prefix)
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}
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cmdStr := strings.Join(cmd.Args, " ")
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cmd.Env = append(cmd.Env, "GIT_PAGER="+pager)
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manager := gui.getManager(view)
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var ptmx *os.File
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start := func() (*exec.Cmd, io.Reader) {
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var err error
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ptmx, err = pty.StartWithSize(cmd, gui.desiredPtySize())
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if err != nil {
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gui.c.Log.Error(err)
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}
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gui.Mutexes.PtyMutex.Lock()
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gui.viewPtmxMap[view.Name()] = ptmx
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gui.Mutexes.PtyMutex.Unlock()
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return cmd, ptmx
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}
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onClose := func() {
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gui.Mutexes.PtyMutex.Lock()
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ptmx.Close()
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delete(gui.viewPtmxMap, view.Name())
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gui.Mutexes.PtyMutex.Unlock()
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}
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linesToRead := gui.linesToReadFromCmdTask(view)
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if err := manager.NewTask(manager.NewCmdTask(start, prefix, linesToRead, onClose), cmdStr); err != nil {
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return err
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}
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return nil
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}
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