ditty/gui_key.go

package main

import (
	"path"

	"github.com/faiface/beep/speaker"
	"github.com/gdamore/tcell"
)

func handleKeyPress(event *tcell.EventKey) *tcell.EventKey {
	switch event.Rune() {
	case '-':
		audioLock.Lock()
		defer audioLock.Unlock()

		if volume == nil {
			return nil
		}

		speaker.Lock()
		volume.Volume -= 0.5
		if volume.Volume <= -7.5 {
			volume.Volume = -7.5
			volume.Silent = true
		}
		speaker.Unlock()

		go app.QueueUpdateDraw(updateStatus)
		return nil
	case '+':
		audioLock.Lock()
		defer audioLock.Unlock()

		if ctrl == nil {
			return nil
		}

		speaker.Lock()
		volume.Volume += 0.5
		if volume.Volume > 0 {
			volume.Volume = 0
		}
		volume.Silent = false
		speaker.Unlock()

		go app.QueueUpdateDraw(updateStatus)
		return nil
	case ' ':
		audioLock.Lock()
		defer audioLock.Unlock()

		if ctrl == nil {
			return nil
		}

		speaker.Lock()
		ctrl.Paused = !ctrl.Paused
		speaker.Unlock()

		go app.QueueUpdateDraw(updateStatus)
		return nil
	case 'j':
		listNext()
		return nil
	case 'k':
		listPrevious()
		return nil
	case 'p':
		if mainBufferCursor > 1 {
			if offsetEntry(-1).File.IsDir() {
				return nil
			}

			listPrevious()
			go listSelect()
		}
		return nil
	case 'n':
		if mainBufferCursor < len(mainBufferFiles) {
			if offsetEntry(1).File.IsDir() {
				return nil
			}

			listNext()
			go listSelect()
		}
		return nil
	case 'q':
		// Queue non-recursively
		return nil
	case 'Q':
		// Queue recursively
		return nil
	}

	switch event.Key() {
	case tcell.KeyEscape:
		done <- true
		return nil
	case tcell.KeyBackspace, tcell.KeyBackspace2:
		mainBufferAutoFocus = mainBufferDirectory

		go browseFolder(path.Join(mainBufferDirectory, ".."))
		return nil
	case tcell.KeyEnter:
		go listSelect()
		return nil
	case tcell.KeyDown:
		listNext()
		return nil
	case tcell.KeyUp:
		listPrevious()
		return nil
	case tcell.KeyPgDn:
		numEntries := len(mainBufferFiles)

		if mainBufferOrigin >= numEntries-(mainBufHeight-1) {
			mainBufferCursor = numEntries

			go app.QueueUpdateDraw(updateMain)
			return nil
		}

		mainBufferOrigin += (mainBufHeight - 1) - 2
		if mainBufferOrigin > (numEntries-(mainBufHeight-1))+2 {
			mainBufferOrigin = (numEntries - (mainBufHeight - 1)) + 2
		}
		mainBufferCursor = mainBufferOrigin

		go app.QueueUpdateDraw(updateMain)
		return nil
	case tcell.KeyPgUp:
		if mainBufferOrigin == 0 {
			mainBufferCursor = 0

			go app.QueueUpdateDraw(updateMain)
			return nil
		}

		mainBufferOrigin -= (mainBufHeight - 1) - 2
		if mainBufferOrigin < 0 {
			mainBufferOrigin = 0
		}
		mainBufferCursor = mainBufferOrigin

		go app.QueueUpdateDraw(updateMain)
		return nil
	}
	return event
}