83 lines
2.0 KiB
Go
83 lines
2.0 KiB
Go
package ui
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import (
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"image"
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"github.com/gdamore/tcell/v2"
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"github.com/rivo/tview"
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)
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const (
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coverRows = 18 // poster height in terminal rows (36 pixels)
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minCoverRows = 6 // a smaller poster is not worth showing
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minTextRows = 10 // the poster never takes these rows from the text
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)
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// detailPane shows a poster above a text. The poster shrinks on short panes
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// and is dropped when the text would get too little room.
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type detailPane struct {
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*tview.Flex
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app *App
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cover *coverView
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text *tview.TextView
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want string // key of the poster that should be shown
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hasCover bool // a poster (or its loading note) is part of the content
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coverSize int // rows currently given to the poster
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}
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func newDetailPane(app *App) *detailPane {
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d := &detailPane{
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Flex: tview.NewFlex().SetDirection(tview.FlexRow),
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app: app,
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cover: newCoverView(),
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text: tview.NewTextView().SetDynamicColors(true).SetWordWrap(true),
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}
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d.AddItem(d.cover, 0, 0, false).AddItem(d.text, 0, 1, false)
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d.SetBorder(true).SetTitle(" Details ")
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return d
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}
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// Show displays the text and, if there is one, the poster.
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func (d *detailPane) Show(text string, ref coverRef) {
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d.text.SetText(text).ScrollToBeginning()
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if !d.app.covers || ref.fetch == nil {
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d.want, d.hasCover = "", false
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d.cover.setImage(nil)
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return
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}
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d.want, d.hasCover = ref.key, true
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d.cover.setNote("loading cover…")
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want := ref.key
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d.app.loadCover(ref, func(img *image.RGBA, err error) {
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if d.want != want {
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return // the selection moved on
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}
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if err != nil {
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d.hasCover = false // nothing to show: give the room back to the text
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d.cover.setImage(nil)
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return
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}
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d.cover.setImage(img)
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})
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}
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// Clear empties the pane.
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func (d *detailPane) Clear() { d.Show("", coverRef{}) }
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func (d *detailPane) Draw(screen tcell.Screen) {
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_, _, _, h := d.GetInnerRect()
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rows := 0
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if d.hasCover {
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rows = min(coverRows, h-minTextRows)
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if rows < minCoverRows {
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rows = 0
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}
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}
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if rows != d.coverSize {
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d.coverSize = rows
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d.ResizeItem(d.cover, rows, 0)
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}
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d.Flex.Draw(screen)
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}
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