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tomo-old/elements/file/file.go

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package fileElements
import "time"
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import "io/fs"
import "image"
import "git.tebibyte.media/sashakoshka/tomo/input"
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import "git.tebibyte.media/sashakoshka/tomo/theme"
import "git.tebibyte.media/sashakoshka/tomo/artist"
import "git.tebibyte.media/sashakoshka/tomo/config"
import "git.tebibyte.media/sashakoshka/tomo/elements/core"
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// File displays an interactive visual representation of a file within any
// file system.
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type File struct {
*core.Core
*core.FocusableCore
core core.CoreControl
focusableControl core.FocusableCoreControl
config config.Wrapped
theme theme.Wrapped
lastClick time.Time
pressed bool
iconID theme.Icon
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filesystem fs.StatFS
location string
selected bool
onChoose func ()
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}
// NewFile creates a new file element. If within is nil, it will use the OS file
// system
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func NewFile (
location string,
within fs.StatFS,
) (
element *File,
err error,
) {
element = &File { }
element.theme.Case = theme.C("files", "file")
element.Core, element.core = core.NewCore(element, element.drawAll)
element.FocusableCore,
element.focusableControl = core.NewFocusableCore(element.core, element.drawAndPush)
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err = element.SetLocation(location, within)
return
}
// Location returns the file's location and filesystem.
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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.
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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.
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func (element *File) Update () error {
element.iconID = theme.IconError
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info, err := element.filesystem.Stat(element.location)
if err != nil { return err }
// TODO: choose icon based on file mime type
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if info.IsDir() {
element.iconID = theme.IconDirectory
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} else {
element.iconID = theme.IconFile
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}
element.updateMinimumSize()
element.drawAndPush()
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return err
}
func (element *File) Selected () bool {
return element.selected
}
func (element *File) SetSelected (selected bool) {
if element.selected == selected { return }
element.selected = selected
element.drawAndPush()
}
func (element *File) HandleKeyDown (key input.Key, modifiers input.Modifiers) {
if !element.Enabled() { return }
if key == input.KeyEnter {
element.pressed = true
element.drawAndPush()
}
}
func (element *File) HandleKeyUp(key input.Key, modifiers input.Modifiers) {
if key == input.KeyEnter && element.pressed {
element.pressed = false
element.drawAndPush()
if !element.Enabled() { return }
if element.onChoose != nil {
element.onChoose()
}
}
}
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func (element *File) OnChoose (callback func ()) {
element.onChoose = callback
}
func (element *File) HandleMouseDown (x, y int, button input.Button) {
if !element.Enabled() { return }
if !element.Focused() { element.Focus() }
if button != input.ButtonLeft { return }
element.pressed = true
element.drawAndPush()
}
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.Bounds())
if time.Since(element.lastClick) < time.Second / 2 {
if element.Enabled() && within && element.onChoose != nil {
element.onChoose()
}
} else {
element.lastClick = time.Now()
}
element.drawAndPush()
}
func (element *File) state () theme.State {
return theme.State {
Disabled: !element.Enabled(),
Focused: element.Focused(),
Pressed: element.pressed,
On: element.selected,
}
}
func (element *File) icon () artist.Icon {
return element.theme.Icon(element.iconID, theme.IconSizeLarge)
}
func (element *File) updateMinimumSize () {
padding := element.theme.Padding(theme.PatternButton)
icon := element.icon()
if icon == nil {
element.core.SetMinimumSize (
padding.Horizontal(),
padding.Vertical())
} else {
bounds := padding.Inverse().Apply(icon.Bounds())
element.core.SetMinimumSize(bounds.Dx(), bounds.Dy())
}
}
func (element *File) drawAndPush () {
if element.core.HasImage() {
element.drawAll()
element.core.DamageAll()
}
}
func (element *File) drawAll () {
// background
state := element.state()
bounds := element.Bounds()
sink := element.theme.Sink(theme.PatternButton)
element.theme.
Pattern(theme.PatternButton, state).
Draw(element.core, 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 (
element.core,
element.theme.Color (
theme.ColorForeground, state),
bounds.Min.Add(offset))
}
}