129 lines
3.2 KiB
Go
129 lines
3.2 KiB
Go
package main
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import (
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"fmt"
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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/charmbracelet/lipgloss"
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)
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const useHighPerformanceRenderer = false
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var (
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titleStyle = func() lipgloss.Style {
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b := lipgloss.RoundedBorder()
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b.Right = "├"
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return lipgloss.NewStyle().BorderStyle(b).Padding(0, 1)
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}()
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infoStyle = func() lipgloss.Style {
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b := lipgloss.RoundedBorder()
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b.Left = "┤"
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return titleStyle.Copy().BorderStyle(b)
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}()
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)
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type jview struct {
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title string
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content string
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ready bool
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lastSize tea.WindowSizeMsg
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viewport viewport.Model
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}
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func newJView(title, content string) jview {
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return jview{title: title, content: content}
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}
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func (m jview) Init() tea.Cmd {
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return nil
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}
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func (m jview) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
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var (
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cmd tea.Cmd
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cmds []tea.Cmd
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)
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switch msg := msg.(type) {
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case tea.KeyMsg:
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if k := msg.String(); k == "ctrl+c" || k == "q" || k == "esc" {
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return initMainscreen(), tea.Batch(m.GetSize, heartbeat())
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}
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case tea.WindowSizeMsg:
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m.lastSize = msg
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headerHeight := lipgloss.Height(m.headerView())
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footerHeight := lipgloss.Height(m.footerView())
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verticalMarginHeight := headerHeight + footerHeight
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if !m.ready {
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// Since this program is using the full size of the viewport we
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// need to wait until we've received the window dimensions before
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// we can initialize the viewport. The initial dimensions come in
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// quickly, though asynchronously, which is why we wait for them
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// here.
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m.viewport = viewport.New(msg.Width, msg.Height-verticalMarginHeight)
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m.viewport.YPosition = headerHeight
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m.viewport.HighPerformanceRendering = useHighPerformanceRenderer
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m.viewport.SetContent(m.content)
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m.ready = true
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// This is only necessary for high performance rendering, which in
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// most cases you won't need.
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//
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// Render the viewport one line below the header.
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m.viewport.YPosition = headerHeight + 1
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} else {
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m.viewport.Width = msg.Width
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m.viewport.Height = msg.Height - verticalMarginHeight
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}
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if useHighPerformanceRenderer {
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// Render (or re-render) the whole viewport. Necessary both to
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// initialize the viewport and when the window is resized.
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//
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// This is needed for high-performance rendering only.
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cmds = append(cmds, viewport.Sync(m.viewport))
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}
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}
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// Handle keyboard and mouse events in the viewport
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m.viewport, cmd = m.viewport.Update(msg)
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cmds = append(cmds, cmd)
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return m, tea.Batch(cmds...)
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}
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func (m jview) View() string {
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if !m.ready {
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return "\n Initializing..."
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}
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return fmt.Sprintf("%s\n%s\n%s", m.headerView(), m.viewport.View(), m.footerView())
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}
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func (m jview) headerView() string {
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title := titleStyle.Render(m.title)
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line := strings.Repeat("─", max(0, m.viewport.Width-lipgloss.Width(title)))
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return lipgloss.JoinHorizontal(lipgloss.Center, title, line)
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}
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func (m jview) footerView() string {
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info := infoStyle.Render(fmt.Sprintf("%3.f%%", m.viewport.ScrollPercent()*100))
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line := strings.Repeat("─", max(0, m.viewport.Width-lipgloss.Width(info)))
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return lipgloss.JoinHorizontal(lipgloss.Center, line, info)
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}
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func max(a, b int) int {
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if a > b {
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return a
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}
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return b
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}
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func (m jview) GetSize() tea.Msg {
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return m.lastSize
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}
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