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Comments and cleanup

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This commit is contained in:
Christian Rocha
2020-06-19 14:14:15 -04:00
parent bbcdb3ac1f
commit 673752658f
3 changed files with 44 additions and 9 deletions
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28
examples/pager/main.go
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@@ -34,12 +34,14 @@ func main() {
os.Exit(1)
}
// Set PAGER_LOG to a path to log to a file. For example,
// Set PAGER_LOG to a path to log to a file. For example:
//
// export PAGER_LOG=debug.log
//
if os.Getenv("PAGER_LOG") != "" {
p := os.Getenv("PAGER_LOG")
// This becomes handy when debugging stuff since you can't debug to stdout
// because the UI is occupying it!
p := os.Getenv("PAGER_LOG")
if p != "" {
f, err := tea.LogToFile(p, "pager")
if err != nil {
fmt.Printf("Could not open file %s: %v", p, err)
@@ -48,7 +50,7 @@ func main() {
defer f.Close()
}
// Use the full size of the terminal in its "Alternate Screen Buffer"
// Use the full size of the terminal in its "alternate screen buffer"
tea.AltScreen()
defer tea.ExitAltScreen()
@@ -71,7 +73,9 @@ type model struct {
func initialize(content string) func() (tea.Model, tea.Cmd) {
return func() (tea.Model, tea.Cmd) {
return model{
content: content, // keep content in the model
// Store content in the model so we can hand it off to the viewport
// later.
content: content,
}, nil
}
}
@@ -86,6 +90,7 @@ func update(msg tea.Msg, mdl tea.Model) (tea.Model, tea.Cmd) {
switch msg := msg.(type) {
case tea.KeyMsg:
// Ctrl+c exits
if msg.Type == tea.KeyCtrlC {
return m, tea.Quit
}
@@ -94,6 +99,11 @@ func update(msg tea.Msg, mdl tea.Model) (tea.Model, tea.Cmd) {
verticalMargins := headerHeight + footerHeight
if !m.ready {
// Since this program is using the full size of the viewport we need
// to wait until we've received the window dimensions before we
// can initialize the viewport. The initial dimensions come in
// quickly, though asynchronously, which is why we wait for them
// here.
m.viewport = viewport.NewModel(msg.Width, msg.Height-verticalMargins)
m.viewport.YPosition = headerHeight
m.viewport.HighPerformanceRendering = useHighPerformanceRenderer
@@ -104,8 +114,11 @@ func update(msg tea.Msg, mdl tea.Model) (tea.Model, tea.Cmd) {
m.viewport.Height = msg.Height - verticalMargins
}
// Render (or re-render) the whole viewport
if useHighPerformanceRenderer {
// Render (or re-render) the whole viewport. Necessary both to
// initialize the viewport and when the window is resized.
//
// This is needed for high-performance rendering only.
cmds = append(cmds, viewport.Sync(m.viewport))
}
}
@@ -115,6 +128,7 @@ func update(msg tea.Msg, mdl tea.Model) (tea.Model, tea.Cmd) {
//
// * Recieves messages from the Bubble Tea runtime
// * Returns commands to the Bubble Tea runtime
//
m.viewport, cmd = viewport.Update(msg, m.viewport)
if useHighPerformanceRenderer {
cmds = append(cmds, cmd)
@@ -143,7 +157,7 @@ func view(mdl tea.Model) string {
footerTop = strings.Repeat(" ", gapSize) + footerTop
footerMid = strings.Repeat("─", gapSize) + footerMid
footerBot = strings.Repeat(" ", gapSize) + footerBot
footer := footerTop + "\n" + footerMid + "\n" + footerBot
footer := fmt.Sprintf("%s\n%s\n%s", footerTop, footerMid, footerBot)
return fmt.Sprintf("%s\n%s\n%s", header, viewport.View(m.viewport), footer)
}