122 lines
2.4 KiB
Go
122 lines
2.4 KiB
Go
/**
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* vaxis/widget/list, edited to support wraparounds and number seeking
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* soon to support confirmations, once i get around to that
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*/
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package ui
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import (
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"fmt"
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"strconv"
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"git.sr.ht/~rockorager/vaxis"
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)
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type List struct {
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index int
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items [][]vaxis.Segment
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offset int
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}
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func NewList(items [][]vaxis.Segment, index int) List {
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return List{
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items: items,
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index: index,
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}
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}
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func (m *List) Draw(win vaxis.Window) {
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_, height := win.Size()
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if m.index >= m.offset+height {
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m.offset = m.index - height + 1
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} else if m.index < m.offset {
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m.offset = m.index
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}
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defaultStyle := vaxis.Style{Attribute: vaxis.AttrNone}
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selectedStyle := vaxis.Style{Attribute: vaxis.AttrReverse}
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index := m.index - m.offset
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for i, subject := range m.items[m.offset:] {
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var style vaxis.Style
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if i == index {
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style = selectedStyle
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} else {
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style = defaultStyle
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}
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var styledSubject []vaxis.Segment
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length := 0
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for _, chunk := range subject {
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length += len(chunk.Text)
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styledSubject = append(styledSubject, vaxis.Segment{Text: chunk.Text, Style: vaxis.Style{Attribute: style.Attribute | chunk.Style.Attribute}})
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}
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styledSubject = append([]vaxis.Segment{{Text: " ", Style: style}}, styledSubject...)
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styledSubject = append(styledSubject, vaxis.Segment{Text: fmt.Sprintf("%"+strconv.Itoa(win.Width-length-2)+"s", ""), Style: style})
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win.Println(i, styledSubject...)
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}
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}
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func (m *List) Down() {
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if m.index == len(m.items)-1 {
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m.index = 0
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} else {
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m.index++
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}
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}
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func (m *List) Up() {
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if m.index == 0 {
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m.index = len(m.items) - 1
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} else {
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m.index--
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}
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}
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func (m *List) Home() {
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m.index = 0
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}
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func (m *List) End() {
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m.index = len(m.items) - 1
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}
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func (m *List) PageDown(win vaxis.Window) {
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_, height := win.Size()
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m.index = min(len(m.items)-1, m.index+height)
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}
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func (m *List) PageUp(win vaxis.Window) {
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_, height := win.Size()
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m.index = max(0, m.index-height)
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}
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func (m *List) Items() []string {
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var items []string
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for _, item := range m.items {
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var text string
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for _, chunk := range item {
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text += chunk.Text
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}
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items = append(items, text)
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}
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return items
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}
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func (m *List) SetItems(items [][]vaxis.Segment) {
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m.items = items
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m.index = min(len(items)-1, m.index)
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}
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func (m *List) SetItem(index int, item []vaxis.Segment) {
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m.items[index] = item
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}
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// Returns the index of the currently selected item.
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func (m *List) Index() int {
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return m.index
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}
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func (m *List) SetIndex(index int) {
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m.index = index
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}
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