323 lines
8.6 KiB
Go
323 lines
8.6 KiB
Go
package elements
|
|
|
|
import "image"
|
|
import "path/filepath"
|
|
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/ability"
|
|
import "git.tebibyte.media/sashakoshka/tomo/shatter"
|
|
|
|
// TODO: base on flow implementation of list. also be able to switch to a table
|
|
// variant for a more information dense view.
|
|
|
|
var directoryCase = tomo.C("tomo", "list")
|
|
|
|
type historyEntry struct {
|
|
location string
|
|
filesystem ReadDirStatFS
|
|
}
|
|
|
|
// Directory displays a list of files within a particular directory and
|
|
// file system.
|
|
type Directory struct {
|
|
container
|
|
entity tomo.Entity
|
|
|
|
scroll image.Point
|
|
contentBounds image.Rectangle
|
|
|
|
history []historyEntry
|
|
historyIndex int
|
|
|
|
onChoose func (file string)
|
|
onScrollBoundsChange func ()
|
|
}
|
|
|
|
// NewDirectory creates a new directory view. If within is nil, it will use
|
|
// the OS file system.
|
|
func NewDirectory (
|
|
location string,
|
|
within ReadDirStatFS,
|
|
) (
|
|
element *Directory,
|
|
err error,
|
|
) {
|
|
element = &Directory { }
|
|
element.entity = tomo.GetBackend().NewEntity(element)
|
|
element.container.entity = element.entity
|
|
element.minimumSize = element.updateMinimumSize
|
|
element.init()
|
|
err = element.SetLocation(location, within)
|
|
return
|
|
}
|
|
|
|
func (element *Directory) Draw (destination artist.Canvas) {
|
|
rocks := make([]image.Rectangle, element.entity.CountChildren())
|
|
for index := 0; index < element.entity.CountChildren(); index ++ {
|
|
rocks[index] = element.entity.Child(index).Entity().Bounds()
|
|
}
|
|
|
|
tiles := shatter.Shatter(element.entity.Bounds(), rocks...)
|
|
for _, tile := range tiles {
|
|
element.DrawBackground(artist.Cut(destination, tile))
|
|
}
|
|
}
|
|
|
|
func (element *Directory) Layout () {
|
|
if element.scroll.Y > element.maxScrollHeight() {
|
|
element.scroll.Y = element.maxScrollHeight()
|
|
}
|
|
|
|
margin := element.entity.Theme().Margin(tomo.PatternPinboard, directoryCase)
|
|
padding := element.entity.Theme().Padding(tomo.PatternPinboard, directoryCase)
|
|
bounds := padding.Apply(element.entity.Bounds())
|
|
element.contentBounds = image.Rectangle { }
|
|
|
|
dot := bounds.Min.Sub(element.scroll)
|
|
xStart := dot.X
|
|
rowHeight := 0
|
|
|
|
nextLine := func () {
|
|
dot.X = xStart
|
|
dot.Y += margin.Y
|
|
dot.Y += rowHeight
|
|
rowHeight = 0
|
|
}
|
|
|
|
for index := 0; index < element.entity.CountChildren(); index ++ {
|
|
child := element.entity.Child(index)
|
|
entry := element.scratch[child]
|
|
|
|
width := int(entry.minBreadth)
|
|
height := int(entry.minSize)
|
|
if width + dot.X > bounds.Max.X {
|
|
nextLine()
|
|
}
|
|
if typedChild, ok := child.(ability.Flexible); ok {
|
|
height = typedChild.FlexibleHeightFor(width)
|
|
}
|
|
if rowHeight < height {
|
|
rowHeight = height
|
|
}
|
|
|
|
childBounds := tomo.Bounds (
|
|
dot.X, dot.Y,
|
|
width, height)
|
|
element.entity.PlaceChild(index, childBounds)
|
|
element.contentBounds = element.contentBounds.Union(childBounds)
|
|
|
|
dot.X += width + margin.X
|
|
}
|
|
|
|
element.contentBounds =
|
|
element.contentBounds.Sub(element.contentBounds.Min)
|
|
|
|
element.entity.NotifyScrollBoundsChange()
|
|
if element.onScrollBoundsChange != nil {
|
|
element.onScrollBoundsChange()
|
|
}
|
|
}
|
|
|
|
func (element *Directory) HandleMouseDown (
|
|
position image.Point,
|
|
button input.Button,
|
|
modifiers input.Modifiers,
|
|
) {
|
|
element.selectNone()
|
|
}
|
|
|
|
func (element *Directory) HandleMouseUp (
|
|
position image.Point,
|
|
button input.Button,
|
|
modifiers input.Modifiers,
|
|
) { }
|
|
|
|
func (element *Directory) HandleChildMouseDown (
|
|
position image.Point,
|
|
button input.Button,
|
|
modifiers input.Modifiers,
|
|
child tomo.Element,
|
|
) {
|
|
element.selectNone()
|
|
if child, ok := child.(ability.Selectable); ok {
|
|
index := element.entity.IndexOf(child)
|
|
element.entity.SelectChild(index, true)
|
|
}
|
|
}
|
|
|
|
func (element *Directory) HandleChildMouseUp (
|
|
position image.Point,
|
|
button input.Button,
|
|
modifiers input.Modifiers,
|
|
child tomo.Element,
|
|
) { }
|
|
|
|
func (element *Directory) HandleChildFlexibleHeightChange (child ability.Flexible) {
|
|
element.updateMinimumSize()
|
|
element.entity.Invalidate()
|
|
element.entity.InvalidateLayout()
|
|
}
|
|
|
|
// ScrollContentBounds returns the full content size of the element.
|
|
func (element *Directory) ScrollContentBounds () image.Rectangle {
|
|
return element.contentBounds
|
|
}
|
|
|
|
// ScrollViewportBounds returns the size and position of the element's
|
|
// viewport relative to ScrollBounds.
|
|
func (element *Directory) ScrollViewportBounds () image.Rectangle {
|
|
padding := element.entity.Theme().Padding(tomo.PatternPinboard, directoryCase)
|
|
bounds := padding.Apply(element.entity.Bounds())
|
|
bounds = bounds.Sub(bounds.Min).Add(element.scroll)
|
|
return bounds
|
|
}
|
|
|
|
// ScrollTo scrolls the viewport to the specified point relative to
|
|
// ScrollBounds.
|
|
func (element *Directory) ScrollTo (position image.Point) {
|
|
if position.Y < 0 {
|
|
position.Y = 0
|
|
}
|
|
maxScrollHeight := element.maxScrollHeight()
|
|
if position.Y > maxScrollHeight {
|
|
position.Y = maxScrollHeight
|
|
}
|
|
element.scroll = position
|
|
element.entity.Invalidate()
|
|
element.entity.InvalidateLayout()
|
|
}
|
|
|
|
// OnScrollBoundsChange sets a function to be called when the element's viewport
|
|
// bounds, content bounds, or scroll axes change.
|
|
func (element *Directory) OnScrollBoundsChange (callback func ()) {
|
|
element.onScrollBoundsChange = callback
|
|
}
|
|
|
|
// ScrollAxes returns the supported axes for scrolling.
|
|
func (element *Directory) ScrollAxes () (horizontal, vertical bool) {
|
|
return false, true
|
|
}
|
|
|
|
func (element *Directory) DrawBackground (destination artist.Canvas) {
|
|
element.entity.Theme().Pattern(tomo.PatternPinboard, tomo.State { }, directoryCase).
|
|
Draw(destination, element.entity.Bounds())
|
|
}
|
|
|
|
func (element *Directory) HandleThemeChange () {
|
|
element.updateMinimumSize()
|
|
element.entity.Invalidate()
|
|
element.entity.InvalidateLayout()
|
|
}
|
|
|
|
// Location returns the directory's location and filesystem.
|
|
func (element *Directory) Location () (string, ReadDirStatFS) {
|
|
if len(element.history) < 1 { return "", nil }
|
|
current := element.history[element.historyIndex]
|
|
return current.location, current.filesystem
|
|
}
|
|
|
|
// SetLocation sets the directory's location and filesystem. If within is nil,
|
|
// it will use the OS file system.
|
|
func (element *Directory) SetLocation (
|
|
location string,
|
|
within ReadDirStatFS,
|
|
) error {
|
|
if within == nil {
|
|
within = defaultFS { }
|
|
}
|
|
element.scroll = image.Point { }
|
|
|
|
if element.history != nil {
|
|
element.historyIndex ++
|
|
}
|
|
element.history = append (
|
|
element.history[:element.historyIndex],
|
|
historyEntry { location, within })
|
|
return element.Update()
|
|
}
|
|
|
|
// Backward goes back a directory in history
|
|
func (element *Directory) Backward () (bool, error) {
|
|
if element.historyIndex > 1 {
|
|
element.historyIndex --
|
|
return true, element.Update()
|
|
} else {
|
|
return false, nil
|
|
}
|
|
}
|
|
|
|
// Forward goes forward a directory in history
|
|
func (element *Directory) Forward () (bool, error) {
|
|
if element.historyIndex < len(element.history) - 1 {
|
|
element.historyIndex ++
|
|
return true, element.Update()
|
|
} else {
|
|
return false, nil
|
|
}
|
|
}
|
|
|
|
// Update refreshes the directory's contents.
|
|
func (element *Directory) Update () error {
|
|
location, filesystem := element.Location()
|
|
entries, err := filesystem.ReadDir(location)
|
|
|
|
children := make([]tomo.Element, len(entries))
|
|
for index, entry := range entries {
|
|
filePath := filepath.Join(location, entry.Name())
|
|
file, _ := NewFile(filePath, filesystem)
|
|
file.OnChoose (func () {
|
|
if element.onChoose != nil {
|
|
element.onChoose(filePath)
|
|
}
|
|
})
|
|
|
|
children[index] = file
|
|
}
|
|
|
|
element.DisownAll()
|
|
element.Adopt(children...)
|
|
return err
|
|
}
|
|
|
|
// OnChoose sets a function to be called when the user double-clicks a file or
|
|
// sub-directory within the directory view.
|
|
func (element *Directory) OnChoose (callback func (file string)) {
|
|
element.onChoose = callback
|
|
}
|
|
|
|
func (element *Directory) selectNone () {
|
|
for index := 0; index < element.entity.CountChildren(); index ++ {
|
|
element.entity.SelectChild(index, false)
|
|
}
|
|
}
|
|
|
|
func (element *Directory) maxScrollHeight () (height int) {
|
|
padding := element.entity.Theme().Padding(tomo.PatternSunken, directoryCase)
|
|
viewportHeight := element.entity.Bounds().Dy() - padding.Vertical()
|
|
height = element.contentBounds.Dy() - viewportHeight
|
|
if height < 0 { height = 0 }
|
|
return
|
|
}
|
|
|
|
|
|
func (element *Directory) updateMinimumSize () {
|
|
padding := element.entity.Theme().Padding(tomo.PatternPinboard, directoryCase)
|
|
minimumWidth := 0
|
|
for index := 0; index < element.entity.CountChildren(); index ++ {
|
|
width, height := element.entity.ChildMinimumSize(index)
|
|
if width > minimumWidth {
|
|
minimumWidth = width
|
|
}
|
|
|
|
key := element.entity.Child(index)
|
|
entry := element.scratch[key]
|
|
entry.minSize = float64(height)
|
|
entry.minBreadth = float64(width)
|
|
element.scratch[key] = entry
|
|
}
|
|
element.entity.SetMinimumSize (
|
|
minimumWidth + padding.Horizontal(),
|
|
padding.Vertical())
|
|
}
|