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file.go
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file.go
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package mobile
import (
"io"
"fyne.io/fyne/v2"
"fyne.io/fyne/v2/internal/driver/mobile/app"
"fyne.io/fyne/v2/storage"
)
type fileOpen struct {
io.ReadCloser
uri fyne.URI
done func()
}
func (f *fileOpen) URI() fyne.URI {
return f.uri
}
func fileReaderForURI(u fyne.URI) (fyne.URIReadCloser, error) {
file := &fileOpen{uri: u}
read, err := nativeFileOpen(file)
if read == nil {
return nil, err
}
file.ReadCloser = read
return file, err
}
func mobileFilter(filter storage.FileFilter) *app.FileFilter {
mobile := &app.FileFilter{}
if f, ok := filter.(*storage.MimeTypeFileFilter); ok {
mobile.MimeTypes = f.MimeTypes
} else if f, ok := filter.(*storage.ExtensionFileFilter); ok {
mobile.Extensions = f.Extensions
} else if filter != nil {
fyne.LogError("Custom filter types not supported on mobile", nil)
}
return mobile
}
type hasOpenPicker interface {
ShowFileOpenPicker(func(string, func()), *app.FileFilter)
}
// ShowFileOpenPicker loads the native file open dialog and returns the chosen file path via the callback func.
func ShowFileOpenPicker(callback func(fyne.URIReadCloser, error), filter storage.FileFilter) {
drv := fyne.CurrentApp().Driver().(*mobileDriver)
if a, ok := drv.app.(hasOpenPicker); ok {
a.ShowFileOpenPicker(func(uri string, closer func()) {
if uri == "" {
callback(nil, nil)
return
}
f, err := fileReaderForURI(nativeURI(uri))
if f != nil {
f.(*fileOpen).done = closer
}
callback(f, err)
}, mobileFilter(filter))
}
}
// ShowFolderOpenPicker loads the native folder open dialog and calls back the chosen directory path as a ListableURI.
func ShowFolderOpenPicker(callback func(fyne.ListableURI, error)) {
filter := storage.NewMimeTypeFileFilter([]string{"application/x-directory"})
drv := fyne.CurrentApp().Driver().(*mobileDriver)
if a, ok := drv.app.(hasOpenPicker); ok {
a.ShowFileOpenPicker(func(path string, _ func()) {
if path == "" {
callback(nil, nil)
return
}
uri, err := storage.ParseURI(path)
if err != nil {
callback(nil, err)
return
}
callback(listerForURI(uri))
}, mobileFilter(filter))
}
}
type fileSave struct {
io.WriteCloser
uri fyne.URI
done func()
}
func (f *fileSave) URI() fyne.URI {
return f.uri
}
func fileWriterForURI(u fyne.URI) (fyne.URIWriteCloser, error) {
file := &fileSave{uri: u}
write, err := nativeFileSave(file)
if write == nil {
return nil, err
}
file.WriteCloser = write
return file, err
}
type hasSavePicker interface {
ShowFileSavePicker(func(string, func()), *app.FileFilter, string)
}
// ShowFileSavePicker loads the native file save dialog and returns the chosen file path via the callback func.
func ShowFileSavePicker(callback func(fyne.URIWriteCloser, error), filter storage.FileFilter, filename string) {
drv := fyne.CurrentApp().Driver().(*mobileDriver)
if a, ok := drv.app.(hasSavePicker); ok {
a.ShowFileSavePicker(func(path string, closer func()) {
if path == "" {
callback(nil, nil)
return
}
uri, err := storage.ParseURI(path)
if err != nil {
callback(nil, err)
return
}
f, err := fileWriterForURI(uri)
if f != nil {
f.(*fileSave).done = closer
}
callback(f, err)
}, mobileFilter(filter), filename)
}
}