Fix #15.
This commit is contained in:
Nuno Cruces
parent
c98b30d2e7
commit
e26955a5bb
75
file.go
75
file.go
@ -62,7 +62,8 @@ func Filename(filename string) Option {
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// FileFilter is an Option that sets a filename filter.
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//
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// macOS hides filename filters from the user,
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// and only supports filtering by extension (or "type").
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// and only supports filtering by extension
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// (or "uniform type identifiers").
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//
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// Patterns may use the GTK syntax on all platforms:
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// https://developer.gnome.org/pygtk/stable/class-gtkfilefilter.html#method-gtkfilefilter--add-pattern
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@ -92,11 +93,14 @@ func (f FileFilters) name() {
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}
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// Windows' patterns are case insensitive, don't support character classes or escaping.
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// First we remove character classes, then escaping. Patterns with literal wildcards are invalid (match nothing).
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//
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// First we remove character classes, then escaping. Patterns with literal wildcards are invalid.
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// The semicolon is a separator, so we replace it with the single character wildcard.
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// Empty and invalid patterns are ignored.
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func (f FileFilters) simplify() {
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for _, filter := range f {
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for i, pattern := range filter.Patterns {
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for i, filter := range f {
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var n = 0
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for _, pattern := range filter.Patterns {
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var escape, invalid bool
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var buf strings.Builder
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for _, r := range removeClasses(pattern) {
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@ -114,22 +118,35 @@ func (f FileFilters) simplify() {
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buf.WriteRune(r)
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escape = false
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}
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if invalid {
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filter.Patterns[i] = ""
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} else {
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filter.Patterns[i] = buf.String()
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if buf.Len() > 0 && !invalid {
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filter.Patterns[n] = buf.String()
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n++
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}
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}
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if n == 0 {
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f[i].Patterns = nil
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} else {
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f[i].Patterns = filter.Patterns[:n]
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}
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}
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}
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// macOS filters by "type"; the case insensitive literal extension is a good proxy.
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// So we extract the extension from each pattern, remove character classes, then escaping.
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// macOS types may be specified as extension strings without the leading period,
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// or as uniform type identifiers:
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// https://developer.apple.com/library/archive/documentation/LanguagesUtilities/Conceptual/MacAutomationScriptingGuide/PromptforaFileorFolder.html
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//
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// First check for uniform type identifiers.
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// Then we extract the extension from each pattern, remove character classes, then escaping.
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// If an extension contains a wildcard, any type is accepted.
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func (f FileFilters) types() []string {
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var res []string
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for _, filter := range f {
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for _, pattern := range filter.Patterns {
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if isUniformTypeIdentifier(pattern) {
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res = append(res, pattern)
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continue
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}
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ext := pattern[strings.LastIndexByte(pattern, '.')+1:]
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var escape bool
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@ -146,10 +163,16 @@ func (f FileFilters) types() []string {
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}
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buf.WriteRune(r)
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}
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res = append(res, buf.String())
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if buf.Len() > 0 {
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res = append(res, buf.String())
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}
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}
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}
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return res
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if res == nil {
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return nil
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}
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// Workaround for macOS bug: first type cannot be a four letter extension, so prepend empty string.
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return append([]string{""}, res...)
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}
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// Remove character classes from pattern, assuming case insensitivity.
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@ -213,6 +236,34 @@ func findClass(pattern string) (start, end int) {
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return -1, -1
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}
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// Uniform type identifiers use the reverse-DNS format:
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// https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/understanding_utis/understand_utis_conc/understand_utis_conc.html
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func isUniformTypeIdentifier(pattern string) bool {
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labels := strings.Split(pattern, ".")
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if len(labels) < 2 {
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return false
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}
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for _, label := range labels {
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if len := len(label); len == 0 || label[0] == '-' || label[len-1] == '-' {
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return false
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}
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for _, r := range label {
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switch {
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case r == '-' || r > '\x7f' ||
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'a' <= r && r <= 'z' ||
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'A' <= r && r <= 'Z' ||
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'0' <= r && r <= '9':
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continue
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default:
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return false
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}
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}
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}
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return true
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}
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func splitDirAndName(path string) (dir, name string) {
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if path != "" {
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path = filepath.Clean(path)
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@ -10,10 +10,11 @@ func TestFileFilters_simplify(t *testing.T) {
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data FileFilters
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want []string
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}{
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{FileFilters{{"", []string{``}}}, nil},
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{FileFilters{{"", []string{`*.png`}}}, []string{"*.png"}},
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{FileFilters{{"", []string{`*.pn?`}}}, []string{"*.pn?"}},
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{FileFilters{{"", []string{`*.pn;`}}}, []string{"*.pn?"}},
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{FileFilters{{"", []string{`*.pn\?`}}}, []string{""}},
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{FileFilters{{"", []string{`*.pn\?`}}}, nil},
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{FileFilters{{"", []string{`*.[PpNnGg]`}}}, []string{"*.?"}},
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{FileFilters{{"", []string{`*.[Pp][Nn][Gg]`}}}, []string{"*.PNG"}},
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{FileFilters{{"", []string{`*.[Pp][\Nn][G\g]`}}}, []string{"*.PNG"}},
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@ -23,6 +24,7 @@ func TestFileFilters_simplify(t *testing.T) {
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{FileFilters{{"", []string{`*.[]]PNG`}}}, []string{"*.]PNG"}},
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{FileFilters{{"", []string{`*.[\[]PNG`}}}, []string{"*.[PNG"}},
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{FileFilters{{"", []string{`*.[\]]PNG`}}}, []string{"*.]PNG"}},
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{FileFilters{{"", []string{`public.png`}}}, []string{"public.png"}},
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}
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for i, tt := range tests {
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tt.data.simplify()
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@ -37,19 +39,21 @@ func TestFileFilters_types(t *testing.T) {
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data FileFilters
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want []string
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}{
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{FileFilters{{"", []string{`*.png`}}}, []string{"png"}},
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{FileFilters{{"", []string{``}}}, nil},
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{FileFilters{{"", []string{`*.png`}}}, []string{"", "png"}},
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{FileFilters{{"", []string{`*.pn?`}}}, nil},
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{FileFilters{{"", []string{`*.pn;`}}}, []string{"pn;"}},
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{FileFilters{{"", []string{`*.pn\?`}}}, []string{"pn?"}},
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{FileFilters{{"", []string{`*.pn;`}}}, []string{"", "pn;"}},
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{FileFilters{{"", []string{`*.pn\?`}}}, []string{"", "pn?"}},
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{FileFilters{{"", []string{`*.[PpNnGg]`}}}, nil},
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{FileFilters{{"", []string{`*.[Pp][Nn][Gg]`}}}, []string{"PNG"}},
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{FileFilters{{"", []string{`*.[Pp][\Nn][G\g]`}}}, []string{"PNG"}},
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{FileFilters{{"", []string{`*.[PNG`}}}, []string{"[PNG"}},
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{FileFilters{{"", []string{`*.]PNG`}}}, []string{"]PNG"}},
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{FileFilters{{"", []string{`*.[[]PNG`}}}, []string{"[PNG"}},
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{FileFilters{{"", []string{`*.[]]PNG`}}}, []string{"]PNG"}},
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{FileFilters{{"", []string{`*.[\[]PNG`}}}, []string{"[PNG"}},
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{FileFilters{{"", []string{`*.[\]]PNG`}}}, []string{"]PNG"}},
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{FileFilters{{"", []string{`*.[Pp][Nn][Gg]`}}}, []string{"", "PNG"}},
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{FileFilters{{"", []string{`*.[Pp][\Nn][G\g]`}}}, []string{"", "PNG"}},
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{FileFilters{{"", []string{`*.[PNG`}}}, []string{"", "[PNG"}},
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{FileFilters{{"", []string{`*.]PNG`}}}, []string{"", "]PNG"}},
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{FileFilters{{"", []string{`*.[[]PNG`}}}, []string{"", "[PNG"}},
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{FileFilters{{"", []string{`*.[]]PNG`}}}, []string{"", "]PNG"}},
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{FileFilters{{"", []string{`*.[\[]PNG`}}}, []string{"", "[PNG"}},
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{FileFilters{{"", []string{`*.[\]]PNG`}}}, []string{"", "]PNG"}},
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{FileFilters{{"", []string{`public.png`}}}, []string{"", "public.png"}},
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}
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for i, tt := range tests {
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if got := tt.data.types(); !reflect.DeepEqual(got, tt.want) {
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