package elements import "time" import "io/fs" import "image" import "git.tebibyte.media/sashakoshka/tomo" import "git.tebibyte.media/sashakoshka/tomo/input" import "git.tebibyte.media/sashakoshka/tomo/artist" import "git.tebibyte.media/sashakoshka/tomo/canvas" import "git.tebibyte.media/sashakoshka/tomo/default/theme" import "git.tebibyte.media/sashakoshka/tomo/default/config" type fileEntity interface { tomo.SelectableEntity tomo.FocusableEntity } // File displays an interactive visual representation of a file within any // file system. type File struct { entity fileEntity config config.Wrapped theme theme.Wrapped lastClick time.Time pressed bool enabled bool iconID tomo.Icon filesystem fs.StatFS location string onChoose func () } // NewFile creates a new file element. If within is nil, it will use the OS file // system func NewFile ( location string, within fs.StatFS, ) ( element *File, err error, ) { element = &File { enabled: true } element.theme.Case = tomo.C("files", "file") element.entity = tomo.NewEntity(element).(fileEntity) err = element.SetLocation(location, within) return } // Entity returns this element's entity. func (element *File) Entity () tomo.Entity { return element.entity } // Draw causes the element to draw to the specified destination canvas. func (element *File) Draw (destination canvas.Canvas) { // background state := element.state() bounds := element.entity.Bounds() sink := element.theme.Sink(tomo.PatternButton) element.theme. Pattern(tomo.PatternButton, state). Draw(destination, bounds) // icon icon := element.icon() if icon != nil { iconBounds := icon.Bounds() offset := image.Pt ( (bounds.Dx() - iconBounds.Dx()) / 2, (bounds.Dy() - iconBounds.Dy()) / 2) if element.pressed { offset = offset.Add(sink) } icon.Draw ( destination, element.theme.Color(tomo.ColorForeground, state), bounds.Min.Add(offset)) } } // Location returns the file's location and filesystem. func (element *File) Location () (string, fs.StatFS) { return element.location, element.filesystem } // SetLocation sets the file's location and filesystem. If within is nil, it // will use the OS file system. func (element *File) SetLocation ( location string, within fs.StatFS, ) error { if within == nil { within = defaultFS { } } element.location = location element.filesystem = within return element.Update() } // Update refreshes the element to match the file it represents. func (element *File) Update () error { info, err := element.filesystem.Stat(element.location) if err != nil { element.iconID = tomo.IconError } else if info.IsDir() { element.iconID = tomo.IconDirectory } else { // TODO: choose icon based on file mime type element.iconID = tomo.IconFile } element.updateMinimumSize() element.entity.Invalidate() return err } func (element *File) HandleKeyDown (key input.Key, modifiers input.Modifiers) { if !element.Enabled() { return } if key == input.KeyEnter { element.pressed = true element.entity.Invalidate() } } func (element *File) HandleKeyUp(key input.Key, modifiers input.Modifiers) { if key == input.KeyEnter && element.pressed { element.pressed = false if !element.Enabled() { return } element.entity.Invalidate() if element.onChoose != nil { element.onChoose() } } } func (element *File) HandleFocusChange () { element.entity.Invalidate() } func (element *File) HandleSelectionChange () { element.entity.Invalidate() } func (element *File) OnChoose (callback func ()) { element.onChoose = callback } // Focus gives this element input focus. func (element *File) Focus () { if !element.entity.Focused() { element.entity.Focus() } } // Enabled returns whether this file is enabled or not. func (element *File) Enabled () bool { return element.enabled } // SetEnabled sets whether this file is enabled or not. func (element *File) SetEnabled (enabled bool) { if element.enabled == enabled { return } element.enabled = enabled element.entity.Invalidate() } func (element *File) HandleMouseDown (x, y int, button input.Button) { if !element.Enabled() { return } if !element.entity.Focused() { element.Focus() } if button != input.ButtonLeft { return } element.pressed = true element.entity.Invalidate() } func (element *File) HandleMouseUp (x, y int, button input.Button) { if button != input.ButtonLeft { return } element.pressed = false within := image.Point { x, y }.In(element.entity.Bounds()) if time.Since(element.lastClick) < element.config.DoubleClickDelay() { if element.Enabled() && within && element.onChoose != nil { element.onChoose() } } else { element.lastClick = time.Now() } element.entity.Invalidate() } // SetTheme sets the element's theme. func (element *File) SetTheme (theme tomo.Theme) { if theme == element.theme.Theme { return } element.theme.Theme = theme element.entity.Invalidate() } // SetConfig sets the element's configuration. func (element *File) SetConfig (config tomo.Config) { if config == element.config.Config { return } element.config.Config = config element.entity.Invalidate() } func (element *File) state () tomo.State { return tomo.State { Disabled: !element.Enabled(), Focused: element.entity.Focused(), Pressed: element.pressed, On: element.entity.Selected(), } } func (element *File) icon () artist.Icon { return element.theme.Icon(element.iconID, tomo.IconSizeLarge) } func (element *File) updateMinimumSize () { padding := element.theme.Padding(tomo.PatternButton) icon := element.icon() if icon == nil { element.entity.SetMinimumSize ( padding.Horizontal(), padding.Vertical()) } else { bounds := padding.Inverse().Apply(icon.Bounds()) element.entity.SetMinimumSize(bounds.Dx(), bounds.Dy()) } }