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GNU GENERAL PUBLIC LICENSE
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# nasin
Nasin provides an easy way to write applications with Tomo. Parts of Tomo that
aren't the GUI toolkit may be found here.

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package nasin
import "image"
import "git.tebibyte.media/tomo/tomo"
// Application represents an application object.
type Application interface {
// Describe returns a description of the application.
Describe () ApplicationDescription
// Init performs the initial setup of the application.
Init ()
}
// ApplicationDescription describes the name and type of an application.
type ApplicationDescription struct {
// The name of the application.
Name string
// The ID of the application. This should be a well-known name, that is,
// a reversed domain name owned by the author with the application name
// as the subdomain.
//
// For example:
// com.example.Application
ID string
// Role describes what the application does.
Role ApplicationRole
}
// String satisfies the fmt.Stringer interface.
func (application ApplicationDescription) String () string {
if application.Name == "" {
return application.Role.String()
} else {
return application.Name
}
}
// ApplicationRole describes what an application does.
type ApplicationRole int; const (
RoleUnknown ApplicationRole = iota
RoleWebBrowser
RoleMesssanger
RolePhone
RoleMail
RoleTerminalEmulator
RoleFileBrowser
RoleTextEditor
RoleDocumentViewer
RoleWordProcessor
RoleSpreadsheet
RoleSlideshow
RoleCalculator
RolePreferences
RoleProcessManager
RoleSystemInformation
RoleManual
RoleCamera
RoleImageViewer
RoleMediaPlayer
RoleImageEditor
RoleAudioEditor
RoleVideoEditor
RoleClock
RoleCalendar
RoleChecklist
)
// String satisfies the fmt.Stringer interface.
func (role ApplicationRole) String () string {
switch role {
case RoleWebBrowser: return "Web Browser"
case RoleMesssanger: return "Messsanger"
case RolePhone: return "Phone"
case RoleMail: return "Mail"
case RoleTerminalEmulator: return "Terminal Emulator"
case RoleFileBrowser: return "File Browser"
case RoleTextEditor: return "Text Editor"
case RoleDocumentViewer: return "Document Viewer"
case RoleWordProcessor: return "Word Processor"
case RoleSpreadsheet: return "Spreadsheet"
case RoleSlideshow: return "Slideshow"
case RoleCalculator: return "Calculator"
case RolePreferences: return "Preferences"
case RoleProcessManager: return "Process Manager"
case RoleSystemInformation: return "System Information"
case RoleManual: return "Manual"
case RoleCamera: return "Camera"
case RoleImageViewer: return "Image Viewer"
case RoleMediaPlayer: return "Media Player"
case RoleImageEditor: return "Image Editor"
case RoleAudioEditor: return "Audio Editor"
case RoleVideoEditor: return "Video Editor"
case RoleClock: return "Clock"
case RoleCalendar: return "Calendar"
case RoleChecklist: return "Checklist"
default: return "unknown"
}
}
// RunApplication is like Run, but runs an application.
func RunApplication (application Application) error {
return tomo.Run(application.Init)
}
// NewApplicationWindow creates a window for an application. It will
// automatically set window information to signal to the OS that the window is
// owned by the application.
func NewApplicationWindow (application Application, bounds image.Rectangle) (tomo.MainWindow, error) {
window, err := tomo.NewWindow(bounds)
if err != nil { return nil, err }
window.SetTitle(application.Describe().String())
return window, nil
}

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module git.tebibyte.media/fspl/nasin
go 1.20
require git.tebibyte.media/tomo/tomo v0.29.0
require golang.org/x/image v0.11.0 // indirect

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git.tebibyte.media/tomo/tomo v0.29.0 h1:uvdPaEQYcWH965y85SjIKwhLklnTbs+x6MRwLfdRvfo=
git.tebibyte.media/tomo/tomo v0.29.0/go.mod h1:C9EzepS9wjkTJjnZaPBh22YvVPyA4hbBAJVU20Rdmps=
github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/image v0.11.0 h1:ds2RoQvBvYTiJkwpSFDwCcDFNX7DqjL2WsUgTNk0Ooo=
golang.org/x/image v0.11.0/go.mod h1:bglhjqbqVuEb9e9+eNR45Jfu7D+T4Qan+NhQk8Ck2P8=
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

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package tomo
import "io"
import "os"
import "io/fs"
import "strings"
import "path/filepath"
// FS is Tomo's implementation of fs.FS. It provides access to a specific part
// of the filesystem.
type FS struct {
path string
}
// FileWriter is a writable version of fs.File.
type FileWriter interface {
fs.File
io.Writer
}
// ApplicationUserDataFS returns an FS that an application can use to store user
// data files.
func ApplicationUserDataFS (app ApplicationDescription) (*FS, error) {
return appFs(userDataDir, app)
}
// ApplicationUserConfigFS returns an FS that an application can use to store
// user configuration files.
func ApplicationUserConfigFS (app ApplicationDescription) (*FS, error) {
configDir, err := os.UserConfigDir()
if err != nil { return nil, err }
return appFs(configDir, app)
}
// ApplicationUserCacheFS returns an FS that an application can use to store
// user cache files.
func ApplicationUserCacheFS (app ApplicationDescription) (*FS, error) {
cacheDir, err := os.UserCacheDir()
if err != nil { return nil, err }
return appFs(cacheDir, app)
}
func pathErr (op, path string, err error) error {
return &fs.PathError {
Op: op,
Path: path,
Err: err,
}
}
func appFs (root string, app ApplicationDescription) (*FS, error) {
// remove slashes
appname := app.String()
appname = strings.ReplaceAll(appname, "/", "-")
appname = strings.ReplaceAll(appname, "\\", "-")
path := filepath.Join(root, appname)
// ensure the directory actually exists
err := os.MkdirAll(path, 755)
if err != nil { return nil, err }
return &FS { path: path }, nil
}
func (this FS) subPath (name string) (string, error) {
if !fs.ValidPath(name) { return "", fs.ErrInvalid }
if strings.Contains(name, "/") { return "", fs.ErrInvalid }
return filepath.Join(this.path, name), nil
}
// Open opens the named file.
func (this FS) Open (name string) (fs.File, error) {
path, err := this.subPath(name)
if err != nil {
return nil, pathErr("open", name, err)
}
return os.Open(path)
}
// Create creates or truncates the named file.
func (this FS) Create (name string) (FileWriter, error) {
path, err := this.subPath(name)
if err != nil {
return nil, pathErr("create", name, err)
}
return os.Create(path)
}
// OpenFile is the generalized open call; most users will use Open or Create
// instead.
func (this FS) OpenFile (
name string,
flag int,
perm os.FileMode,
) (
FileWriter,
error,
) {
path, err := this.subPath(name)
if err != nil {
return nil, pathErr("open", name, err)
}
return os.OpenFile(path, flag, perm)
}
// ReadDir reads the named directory and returns a list of directory entries
// sorted by filename.
func (this FS) ReadDir (name string) ([]fs.DirEntry, error) {
path, err := this.subPath(name)
if err != nil {
return nil, pathErr("readdir", name, err)
}
return os.ReadDir(path)
}
// ReadFile reads the named file and returns its contents.
// A successful call returns a nil error, not io.EOF.
// (Because ReadFile reads the whole file, the expected EOF
// from the final Read is not treated as an error to be reported.)
//
// The caller is permitted to modify the returned byte slice.
func (this FS) ReadFile (name string) ([]byte, error) {
path, err := this.subPath(name)
if err != nil {
return nil, pathErr("readfile", name, err)
}
return os.ReadFile(path)
}
// WriteFile writes data to the named file, creating it if necessary.
func (this FS) WriteFile (name string, data []byte, perm os.FileMode) error {
path, err := this.subPath(name)
if err != nil {
return pathErr("writefile", name, err)
}
return os.WriteFile(path, data, perm)
}
// Stat returns a FileInfo describing the file.
func (this FS) Stat (name string) (fs.FileInfo, error) {
path, err := this.subPath(name)
if err != nil {
return nil, pathErr("stat", name, err)
}
return os.Stat(path)
}
// Remove removes the named file or (empty) directory.
func (this FS) Remove (name string) error {
path, err := this.subPath(name)
if err != nil {
return pathErr("remove", name, err)
}
return os.Remove(path)
}
// RemoveAll removes name and any children it contains.
func (this FS) RemoveAll (name string) error {
path, err := this.subPath(name)
if err != nil {
return pathErr("removeall", name, err)
}
return os.RemoveAll(path)
}
// Rename renames (moves) oldname to newname.
func (this FS) Rename (oldname, newname string) error {
oldpath, err := this.subPath(oldname)
if err != nil {
return pathErr("rename", oldname, err)
}
newpath, err := this.subPath(newname)
if err != nil {
return pathErr("rename", newname, err)
}
return os.Rename(oldpath, newpath)
}