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package core
import (
"strings"
"github.com/charmbracelet/bubbles/key"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
"github.com/kujtimiihoxha/termai/internal/tui/styles"
)
type HelpCmp interface {
tea.Model
SetBindings(bindings []key.Binding)
Height() int
}
const (
helpWidgetHeight = 12
)
type helpCmp struct {
width int
bindings []key.Binding
}
func (h *helpCmp) Init() tea.Cmd {
return nil
}
func (h *helpCmp) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
switch msg := msg.(type) {
case tea.WindowSizeMsg:
h.width = msg.Width
}
return h, nil
}
func (h *helpCmp) View() string {
helpKeyStyle := styles.Bold.Foreground(styles.Rosewater).Margin(0, 1, 0, 0)
helpDescStyle := styles.Regular.Foreground(styles.Flamingo)
// Compile list of bindings to render
bindings := removeDuplicateBindings(h.bindings)
// Enumerate through each group of bindings, populating a series of
// pairs of columns, one for keys, one for descriptions
var (
pairs []string
width int
rows = helpWidgetHeight - 2
)
for i := 0; i < len(bindings); i += rows {
var (
keys []string
descs []string
)
for j := i; j < min(i+rows, len(bindings)); j++ {
keys = append(keys, helpKeyStyle.Render(bindings[j].Help().Key))
descs = append(descs, helpDescStyle.Render(bindings[j].Help().Desc))
}
// Render pair of columns; beyond the first pair, render a three space
// left margin, in order to visually separate the pairs.
var cols []string
if len(pairs) > 0 {
cols = []string{" "}
}
cols = append(cols,
strings.Join(keys, "\n"),
strings.Join(descs, "\n"),
)
pair := lipgloss.JoinHorizontal(lipgloss.Top, cols...)
// check whether it exceeds the maximum width avail (the width of the
// terminal, subtracting 2 for the borders).
width += lipgloss.Width(pair)
if width > h.width-2 {
break
}
pairs = append(pairs, pair)
}
// Join pairs of columns and enclose in a border
content := lipgloss.JoinHorizontal(lipgloss.Top, pairs...)
return styles.DoubleBorder.Height(rows).PaddingLeft(1).Width(h.width - 2).Render(content)
}
func removeDuplicateBindings(bindings []key.Binding) []key.Binding {
seen := make(map[string]struct{})
result := make([]key.Binding, 0, len(bindings))
// Process bindings in reverse order
for i := len(bindings) - 1; i >= 0; i-- {
b := bindings[i]
k := strings.Join(b.Keys(), " ")
if _, ok := seen[k]; ok {
// duplicate, skip
continue
}
seen[k] = struct{}{}
// Add to the beginning of result to maintain original order
result = append([]key.Binding{b}, result...)
}
return result
}
func (h *helpCmp) SetBindings(bindings []key.Binding) {
h.bindings = bindings
}
func (h helpCmp) Height() int {
return helpWidgetHeight
}
func NewHelpCmp() HelpCmp {
return &helpCmp{
width: 0,
bindings: make([]key.Binding, 0),
}
}
|
