90 lines
2.4 KiB
Go
90 lines
2.4 KiB
Go
package tui
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import (
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"os"
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"os/exec"
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"strings"
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"github.com/charmbracelet/bubbles/viewport"
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tea "github.com/charmbracelet/bubbletea"
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"github.com/muesli/reflow/ansi"
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)
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type msgTempfileEditorClosed string
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// openTempfileEditor opens an $EDITOR on a new temporary file with the given
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// content. Upon closing, the contents of the file are read back returned
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// wrapped in a msgTempfileEditorClosed returned by the tea.Cmd
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func openTempfileEditor(pattern string, content string, placeholder string) tea.Cmd {
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msgFile, _ := os.CreateTemp("/tmp", pattern)
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err := os.WriteFile(msgFile.Name(), []byte(placeholder+content), os.ModeAppend)
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if err != nil {
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return wrapError(err)
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}
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editor := os.Getenv("EDITOR")
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if editor == "" {
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editor = "vim"
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}
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c := exec.Command(editor, msgFile.Name())
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return tea.ExecProcess(c, func(err error) tea.Msg {
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bytes, err := os.ReadFile(msgFile.Name())
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if err != nil {
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return msgError(err)
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}
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os.Remove(msgFile.Name())
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fileContents := string(bytes)
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if strings.HasPrefix(fileContents, placeholder) {
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fileContents = fileContents[len(placeholder):]
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}
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stripped := strings.Trim(fileContents, "\n \t")
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return msgTempfileEditorClosed(stripped)
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})
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}
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// similar to lipgloss.Height, except returns 0 on empty strings
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func height(str string) int {
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if str == "" {
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return 0
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}
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return strings.Count(str, "\n") + 1
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}
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// truncate a string until its rendered cell width + the provided tail fits
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// within the given width
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func truncateToCellWidth(str string, width int, tail string) string {
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cellWidth := ansi.PrintableRuneWidth(str)
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if cellWidth <= width {
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return str
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}
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tailWidth := ansi.PrintableRuneWidth(tail)
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for {
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str = str[:len(str)-((cellWidth+tailWidth)-width)]
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cellWidth = ansi.PrintableRuneWidth(str)
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if cellWidth+tailWidth <= max(width, 0) {
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break
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}
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}
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return str + tail
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}
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// fraction is the fraction of the total screen height into view the offset
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// should be scrolled into view. 0.5 = items will be snapped to middle of
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// view
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func scrollIntoView(vp *viewport.Model, offset int, edge int) {
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currentOffset := vp.YOffset
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if offset >= currentOffset && offset < currentOffset+vp.Height {
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return
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}
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distance := currentOffset - offset
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if distance < 0 {
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// we should scroll down until it just comes into view
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vp.SetYOffset(currentOffset - (distance + (vp.Height - edge)) + 1)
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} else {
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// we should scroll up
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vp.SetYOffset(currentOffset - distance - edge)
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}
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}
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