/
ui.go
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/
ui.go
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package widgets
import (
"fmt"
"strings"
"github.com/ambientsound/pms/api"
"github.com/ambientsound/pms/console"
"github.com/ambientsound/pms/constants"
"github.com/ambientsound/pms/options"
"github.com/ambientsound/pms/songlist"
"github.com/ambientsound/pms/style"
"github.com/gdamore/tcell/v2"
"github.com/gdamore/tcell/v2/views"
)
type UI struct {
// UI elements
Screen tcell.Screen
App *views.Application
Layout *views.BoxLayout
Topbar *Topbar
Columnheaders *ColumnheadersWidget
Multibar *MultibarWidget
Songlist *SonglistWidget
// Input events
EventInputCommand chan string
EventKeyInput chan *tcell.EventKey
// Data resources
api api.API
options *options.Options // FIXME: use api instead
searchResult songlist.Songlist
// TCell
view views.View
style.Styled
views.WidgetWatchers
}
func NewUI(a api.API) (*UI, error) {
var err error
ui := &UI{}
ui.Screen, err = tcell.NewScreen()
if err != nil {
return nil, err
}
ui.EventInputCommand = make(chan string, 16)
ui.EventKeyInput = make(chan *tcell.EventKey, 16)
ui.App = &views.Application{}
ui.api = a
ui.options = ui.api.Options()
ui.Topbar = NewTopbar()
ui.Columnheaders = NewColumnheadersWidget()
ui.Multibar = NewMultibarWidget(ui.api, ui.EventKeyInput)
ui.Songlist = NewSonglistWidget(ui.api)
ui.Multibar.Watch(ui)
ui.Songlist.Watch(ui)
// Set styles
ui.SetStylesheet(ui.api.Styles())
ui.Topbar.SetStylesheet(ui.api.Styles())
ui.Columnheaders.SetStylesheet(ui.api.Styles())
ui.Songlist.SetStylesheet(ui.api.Styles())
ui.Multibar.SetStylesheet(ui.api.Styles())
ui.CreateLayout()
ui.App.SetScreen(ui.Screen)
ui.App.SetRootWidget(ui)
return ui, nil
}
func (ui *UI) CreateLayout() {
ui.Layout = views.NewBoxLayout(views.Vertical)
ui.Layout.AddWidget(ui.Topbar, 1)
ui.Layout.AddWidget(ui.Columnheaders, 0)
ui.Layout.AddWidget(ui.Songlist, 2)
ui.Layout.AddWidget(ui.Multibar, 0)
ui.Layout.SetView(ui.view)
}
func (ui *UI) Refresh() {
ui.App.Refresh()
}
func (ui *UI) CurrentSonglistWidget() api.SonglistWidget {
return ui.Songlist
}
func (ui *UI) Start() {
ui.App.Start()
}
func (ui *UI) Wait() error {
return ui.App.Wait()
}
func (ui *UI) Quit() {
ui.App.Quit()
}
func (ui *UI) Draw() {
ui.Layout.Draw()
}
func (ui *UI) Resize() {
ui.api.Db().Left().SetUpdated()
ui.api.Db().Right().SetUpdated()
ui.CreateLayout()
ui.Layout.Resize()
ui.PostEventWidgetResize(ui)
}
func (ui *UI) SetView(v views.View) {
ui.view = v
ui.Layout.SetView(v)
}
func (ui *UI) Size() (int, int) {
return ui.view.Size()
}
func (ui *UI) UpdateCursor() {
switch ui.Multibar.Mode() {
case constants.MultibarModeInput, constants.MultibarModeSearch:
_, ymax := ui.Screen.Size()
ui.Screen.ShowCursor(ui.Multibar.Cursor()+1, ymax-1)
default:
ui.Screen.HideCursor()
}
}
func (ui *UI) PostFunc(f func()) {
ui.App.PostFunc(f)
}
func (ui *UI) HandleEvent(ev tcell.Event) bool {
switch ev.(type) {
// If a list was changed, make sure we obtain the correct column widths.
case *EventListChanged:
tags := strings.Split(ui.options.StringValue("columns"), ",")
cols := ui.api.Songlist().Columns(tags)
ui.Songlist.SetColumns(tags)
ui.Columnheaders.SetColumns(cols)
return true
case *EventInputChanged:
term := ui.Multibar.RuneString()
mode := ui.Multibar.Mode()
switch mode {
case constants.MultibarModeSearch:
if err := ui.runIndexSearch(term); err != nil {
console.Log("Error while searching: %s", err)
}
}
ui.UpdateCursor()
return true
case *EventInputFinished:
term := ui.Multibar.RuneString()
mode := ui.Multibar.Mode()
switch mode {
case constants.MultibarModeInput:
ui.EventInputCommand <- term
case constants.MultibarModeSearch:
if ui.searchResult != nil {
if ui.searchResult.Len() > 0 {
ui.api.Db().Panel().Add(ui.searchResult)
} else {
ui.searchResult = nil
}
}
ui.showSearchResult()
}
ui.Multibar.SetMode(constants.MultibarModeNormal)
return true
case *EventScroll:
ui.refreshPositionReadout()
return true
}
if ui.Layout.HandleEvent(ev) {
return true
}
return false
}
func (ui *UI) refreshPositionReadout() {
str := ui.Songlist.PositionReadout()
ui.Multibar.SetRight(str, ui.Style("readout"))
}
func (ui *UI) runIndexSearch(term string) error {
var err error
library := ui.api.Library()
if library == nil {
return fmt.Errorf("Song library is not present.")
}
ui.searchResult, err = library.Search(term)
ui.showSearchResult()
return err
}
func (ui *UI) showSearchResult() {
panel := ui.api.Db().Panel()
if ui.searchResult != nil {
panel.Activate(ui.searchResult)
} else if panel.Last() != nil {
panel.Activate(panel.Last())
} else {
panel.ActivateIndex(0)
}
}