Add XDG icon theme loader
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package xdgIcons
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import "os"
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import "fmt"
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import "log"
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import "image"
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import "regexp"
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import "strings"
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import _ "image/png"
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import "git.tebibyte.media/tomo/tomo"
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import xdgIconTheme "git.tebibyte.media/tomo/xdg/icon-theme"
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import "git.tebibyte.media/tomo/tomo/data"
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import "git.tebibyte.media/tomo/tomo/canvas"
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import "git.tebibyte.media/tomo/nasin/internal/theme"
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type iconTheme struct {
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xdg xdgIconTheme.Theme
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texturesSmall map[tomo.Icon] canvas.Texture
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texturesMedium map[tomo.Icon] canvas.Texture
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texturesLarge map[tomo.Icon] canvas.Texture
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}
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func FindThemeWarn (name string, path ...string) (theme.IconTheme, error) {
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this := &iconTheme {
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texturesLarge: make(map[tomo.Icon] canvas.Texture),
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texturesMedium: make(map[tomo.Icon] canvas.Texture),
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texturesSmall: make(map[tomo.Icon] canvas.Texture),
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}
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xdg, err := xdgIconTheme.FindThemeWarn(name, path...)
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if err != nil { return nil, err }
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this.xdg = xdg
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return this, nil
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}
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func (this *iconTheme) selectSource (size tomo.IconSize) map[tomo.Icon] canvas.Texture {
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switch size {
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case tomo.IconSizeMedium: return this.texturesMedium
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case tomo.IconSizeLarge: return this.texturesLarge
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default: return this.texturesSmall
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}
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}
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func (this *iconTheme) xdgIcon (name string, size tomo.IconSize) (canvas.Texture, bool) {
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// TODO use scaling factor instead of 1
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// find icon file
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icon, err := this.xdg.FindIcon(name, iconSizePixels(size), 1, xdgIconTheme.PNG)
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if err != nil { return nil, false }
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// open icon file
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iconFile, err := os.Open(icon.Path)
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if err != nil {
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// this failing indicates a broken icon theme
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log.Println("nasin: icon file '%s' is inaccessible: %v", icon.Path, err)
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return nil, false
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}
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iconImage, _, err := image.Decode(iconFile)
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if err != nil {
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// this failing indicates a broken icon theme
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log.Println("nasin: icon file '%s' is broken: %v", icon.Path, err)
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return nil, false
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}
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return tomo.NewTexture(iconImage), true
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}
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func (this *iconTheme) Icon (icon tomo.Icon, size tomo.IconSize) canvas.Texture {
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source := this.selectSource(size)
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if texture, ok := source[icon]; ok { return texture }
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texture := this.icon(icon, size)
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source[icon] = texture
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return texture
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}
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func (this *iconTheme) MimeIcon (mime data.Mime, size tomo.IconSize) canvas.Texture {
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icon := tomo.Icon(mime.String())
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source := this.selectSource(size)
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if texture, ok := source[icon]; ok { return texture }
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texture := this.mimeIcon(mime, size)
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source[icon] = texture
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return texture
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}
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func (this *iconTheme) icon (icon tomo.Icon, size tomo.IconSize) canvas.Texture {
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if texture, ok := this.xdgIcon(XdgIconName(icon), size); ok {
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return texture
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}
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if texture, ok := this.xdgIcon(XdgIconName(generalizeIcon(icon)), size); ok {
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return texture
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}
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return nil
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}
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func (this *iconTheme) mimeIcon (mime data.Mime, size tomo.IconSize) canvas.Texture {
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if texture, ok := this.xdgIcon(xdgFormatMime(mime), size); ok {
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return texture
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}
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if texture, ok := this.xdgIcon(xdgFormatMime(generalizeMimeType(mime)), size); ok {
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return texture
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}
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if texture, ok := this.xdgIcon(xdgFormatMime(data.M("text", "x-generic")), size); ok {
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return texture
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}
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return nil
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}
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var kebabMatchFirstCap = regexp.MustCompile("(.)([A-Z][a-z]+)")
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var kebabMatchAllCaps = regexp.MustCompile("([a-z0-9])([A-Z])")
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// XdgIconName returns the best XDG name for the given icon.
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func XdgIconName (icon tomo.Icon) string {
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if name, ok := xdgIconNames[icon]; ok {
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return name
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}
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name := kebabMatchFirstCap.ReplaceAllString(string(icon), "${1}-${2}")
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name = kebabMatchAllCaps.ReplaceAllString(string(name), "${1}-${2}")
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return strings.ToLower(name)
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}
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func generalizeIcon (icon tomo.Icon) tomo.Icon {
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name := string(icon)
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switch {
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case strings.HasPrefix(name, "Application"): return tomo.IconApplication
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case strings.HasPrefix(name, "Preferences"): return tomo.IconPreferences
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case strings.HasPrefix(name, "Device"): return tomo.IconDevice
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case strings.HasPrefix(name, "Hardware"): return tomo.IconHardware
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case strings.HasPrefix(name, "Storage"): return tomo.IconStorageHardDisk
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case strings.HasPrefix(name, "Input"): return tomo.IconInputMouse
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case strings.HasPrefix(name, "Network"): return tomo.IconNetworkWired
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case strings.HasPrefix(name, "Place"): return tomo.IconPlaceDirectory
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case strings.HasPrefix(name, "Directory"): return tomo.IconPlaceDirectory
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case strings.HasPrefix(name, "Trash"): return tomo.IconPlaceTrash
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case strings.HasPrefix(name, "Help"): return tomo.IconHelpContents
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}
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switch icon {
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case tomo.IconCellularSignal0: return tomo.IconWirelessSignal0
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case tomo.IconCellularSignal1: return tomo.IconWirelessSignal1
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case tomo.IconCellularSignal2: return tomo.IconWirelessSignal2
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case tomo.IconCellularSignal3: return tomo.IconWirelessSignal3
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}
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return icon
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}
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func xdgFormatMime (mime data.Mime) string {
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return fmt.Sprintf("%s-%s", mime.Type, mime.Subtype)
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}
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func generalizeMimeType (mime data.Mime) data.Mime {
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// FIXME make this more accurate
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// https://specifications.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
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mime.Subtype = "x-generic"
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return mime
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}
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func iconSizePixels (size tomo.IconSize) int {
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// TODO: once Tomo has scaling support, take that into account here
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switch size {
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case tomo.IconSizeMedium: return 24
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case tomo.IconSizeLarge: return 48
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default: return 16
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}
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}
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@ -0,0 +1,136 @@
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package xdgIcons
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import "git.tebibyte.media/tomo/tomo"
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// icons that can't be directly translated with regex
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var xdgIconNames = map[tomo.Icon] string {
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tomo.IconUnknown: "image-missing",
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tomo.IconFileNew: "document-new",
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tomo.IconDirectoryNew: "folder-new",
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tomo.IconFileOpen: "document-open",
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tomo.IconFileOpenRecent: "document-open-recent",
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tomo.IconFilePageSetup: "document-page-setup",
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tomo.IconFilePrint: "document-print",
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tomo.IconFilePrintPreview: "document-print-preview",
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tomo.IconFilePermissions: "document-permissions", // non-standard
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tomo.IconFileProperties: "document-properties",
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tomo.IconFileRename: "document-rename", // non-standard
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tomo.IconFileRevert: "document-revert",
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tomo.IconFileSave: "document-save",
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tomo.IconFileSaveAs: "document-save-as",
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tomo.IconFileSend: "document-send",
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tomo.IconFormatAlignCenter: "format-justify-center",
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tomo.IconFormatAlignEven: "format-justify-fill",
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tomo.IconFormatAlignLeft: "format-justify-left",
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tomo.IconFormatAlignRight: "format-justify-right",
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tomo.IconMailReceive: "mail-send-receive",
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tomo.IconValueIncrement: "list-add",
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tomo.IconValueDecrement: "list-remove",
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tomo.IconValueReset: "value-reset", // non-standard
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tomo.IconApplication: "system-run",
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tomo.IconApplicationWebBrowser: "web-browser",
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tomo.IconApplicationMesssanger: "internet-messanger", // non-standard
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tomo.IconApplicationPhone: "accessories-phone", // non-standard
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tomo.IconApplicationMail: "internet-mail-client", // non-standard
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tomo.IconApplicationTerminalEmulator: "utilities-terminal",
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tomo.IconApplicationFileBrowser: "system-file-manager",
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tomo.IconApplicationTextEditor: "accessories-text-editor",
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tomo.IconApplicationDocumentViewer: "office-document-viewer", // non-standard
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tomo.IconApplicationWordProcessor: "office-word-processor", // non-standard
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tomo.IconApplicationSpreadsheet: "office-spreadsheet", // non-standard
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tomo.IconApplicationSlideshow: "office-slideshow", // non-standard
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tomo.IconApplicationCalculator: "accessories-calculator",
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tomo.IconApplicationPreferences: "preferences-system",
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tomo.IconApplicationProcessManager: "utilities-system-monitor",
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tomo.IconApplicationSystemInformation: "distributor-logo", // non-standard
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tomo.IconApplicationManual: "help-browser",
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tomo.IconApplicationCamera: "accessories-camera", // non-standard
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tomo.IconApplicationImageViewer: "graphics-image-viewer", // non-standard
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tomo.IconApplicationMediaPlayer: "audio-video-media-player", // non-standard
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tomo.IconApplicationImageEditor: "graphics-image-editor", // non-standard
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tomo.IconApplicationAudioEditor: "audio-audio-editor", // non-standard
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tomo.IconApplicationVideoEditor: "video-video-editor", // non-standard
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tomo.IconApplicationClock: "accessories-clock", // non-standard
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tomo.IconApplicationCalendar: "accessories-calendar", // non-standard
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tomo.IconApplicationChecklist: "accessories-checklist", // non-standard
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tomo.IconApplications: "applications-other",
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tomo.IconPreferences: "preferences-other",
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tomo.IconPreferencesNetwork: "preferences-system-network",
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tomo.IconDevice: "device", // non-standard
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tomo.IconDeviceCamera: "camera-photo",
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tomo.IconDeviceWebCamera: "camera-web",
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tomo.IconDeviceComputer: "computer",
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tomo.IconDevicePda: "pda",
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tomo.IconDevicePhone: "phone",
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tomo.IconDevicePrinter: "printer",
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tomo.IconDeviceScanner: "scanner",
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tomo.IconDeviceMultimediaPlayer: "multimedia-player",
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tomo.IconDeviceVideoDisplay: "video-display",
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tomo.IconDeviceAudioInput: "audio-input-microphone",
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tomo.IconDeviceAudioOutput: "audio-speakers",
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tomo.IconHardware: "card", // non-standard
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tomo.IconHardwareCPU: "cpu",
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tomo.IconHardwareGPU: "video-card",
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tomo.IconHardwareRAM: "ram",
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tomo.IconHardwareSoundCard: "audio-card",
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tomo.IconHardwareNetworkAdapter: "network-card",
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tomo.IconPowerBattery: "battery",
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tomo.IconStorageHardDisk: "drive-harddisk",
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tomo.IconStorageFloppyDisk: "media-floppy",
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tomo.IconStorageSolidState: "drive-solid",
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tomo.IconStorageOptical: "media-optical",
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tomo.IconStorageFlashStick: "media-removable",
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tomo.IconStorageFlashCard: "media-flash",
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tomo.IconStorageMagneticTape: "media-tape",
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tomo.IconEmblemReadOnly: "emblem-readonly",
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tomo.IconPlaceDirectory: "folder",
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tomo.IconPlaceRemote: "folder-remote",
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tomo.IconPlaceHome: "user-home",
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tomo.IconPlaceDownloads: "folder-downloads", // common
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tomo.IconPlaceDesktop: "user-desktop",
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tomo.IconPlacePhotos: "folder-pictures", // common
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tomo.IconPlaceBooks: "folder-books", // non-standard
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tomo.IconPlaceBookmarks: "user-bookmarks",
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tomo.IconPlaceTrash: "user-trash",
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tomo.IconPlaceDocuments: "folder-documents", // common
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tomo.IconPlaceRepositories: "folder-repositories", // non-standard
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tomo.IconPlaceMusic: "folder-music", // common
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tomo.IconPlaceArchives: "folder-archives", // non-standard
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tomo.IconPlaceFonts: "folder-fonts", // non-standard
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tomo.IconPlaceBinaries: "folder-executables", // non-standard
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tomo.IconPlaceVideos: "folder-videos", // common
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tomo.IconPlace3DObjects: "folder-3d-objects", // non-standard
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tomo.IconPlaceHistory: "folder-history", // non-standard
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tomo.IconPlacePreferences: "preferences-other",
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tomo.IconDirectoryDragAccept: "folder-drag-accept",
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tomo.IconDirectoryFull: "folder-full",
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tomo.IconDirectoryOpen: "folder-open",
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tomo.IconDirectoryVisiting: "folder-visiting",
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tomo.IconTrashFull: "user-trash-full",
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tomo.IconResourceLoading: "image-loading",
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tomo.IconResourceMissing: "image-missing",
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tomo.IconCellularSignal0: "nm-signal-00", // common
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tomo.IconCellularSignal1: "nm-signal-25", // common
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tomo.IconCellularSignal2: "nm-signal-75", // common
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tomo.IconCellularSignal3: "nm-signal-100", // common
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tomo.IconWirelessSignal0: "wifi-signal-00", // common
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tomo.IconWirelessSignal1: "wifi-signal-25", // common
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tomo.IconWirelessSignal2: "wifi-signal-75", // common
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tomo.IconWirelessSignal3: "wifi-signal-100", // common
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tomo.IconPrintError: "printer-error",
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tomo.IconPrintPrinting: "printer-printing",
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tomo.IconBattery0: "battery-caution",
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tomo.IconBattery1: "battery-low",
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tomo.IconBattery2: "battery-good", // common
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tomo.IconBattery3: "battery-full", // common
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tomo.IconBrightness0: "brightness-dim", // non-standard
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tomo.IconBrightness1: "brightness-medium", // non-standard
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tomo.IconBrightness2: "brightness-bright", // non-standard
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tomo.IconBrightness3: "brightness-full", // non-standard
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tomo.IconVolume0: "audio-volume-muted",
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tomo.IconVolume1: "audio-volume-low",
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tomo.IconVolume2: "audio-volume-medium",
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tomo.IconVolume3: "audio-volume-high",
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tomo.IconPlaylistRepeat: "media-playlist-repeat",
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tomo.IconPlaylistShuffle: "media-playlist-shuffle",
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}
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