nasin/internal/registrar/registrar_unix.go

//go:build unix && (!darwin)
package registrar

import "log"
import "git.tebibyte.media/tomo/tomo"
import "git.tebibyte.media/tomo/backend/x"
import "git.tebibyte.media/tomo/tomo/event"
import "git.tebibyte.media/sashakoshka/goparse"
import "git.tebibyte.media/tomo/nasin/internal/icons/xdg"
import "git.tebibyte.media/tomo/nasin/internal/styles/tss"
import "git.tebibyte.media/tomo/nasin/internal/icons/fallback"
import "git.tebibyte.media/tomo/nasin/internal/styles/fallback"
import "git.tebibyte.media/tomo/nasin/internal/faces/fallback"

type Registrar struct {
	backend *x.Backend
	iconSetCookie event.Cookie
	styleCookie   event.Cookie
}

func (this *Registrar) SetBackend () (tomo.Backend, error) {
	backend, err := x.New()
	if err != nil { return nil, err }
	this.backend = backend.(*x.Backend)
	tomo.SetBackend(backend)
	return backend, nil
}

func (this *Registrar) SetStyle (name string) error {
	if this.styleCookie != nil {
		this.styleCookie.Close()
		this.styleCookie = nil
	}

	if name != "" {
		styl, cookie, err := tss.LoadFile(name)
		if err == nil {
			this.backend.SetStyle(styl)
			this.styleCookie = cookie
			return nil
		} else {
			log.Printf (
				"nasin: could not load style sheet '%s'\n%v",
				name, parse.Format(err))
		}
	}
	
	styl, cookie := fallbackStyle.New()
	this.styleCookie = cookie
	this.backend.SetStyle(styl)
	return nil
}

func (this *Registrar) SetIconSet (name string) error {
	if this.iconSetCookie != nil {
		this.iconSetCookie.Close()
		this.iconSetCookie = nil
	}
	
	iconSet, cookie := fallbackIcons.New()
	if name != "" {
		xdgIconSet, xdgCookie, err := xdgIcons.FindThemeWarn(name, iconSet)
		cookie = event.MultiCookie(cookie, xdgCookie)
		if err == nil {
			iconSet = xdgIconSet
		} else {
			log.Printf("nasin: could not load icon theme '%s': %v", name, err)
		}
	}
	
	this.backend.SetIconSet(iconSet)
	this.iconSetCookie = cookie
	return nil
}

func (this *Registrar) SetFaceSet () error {
	// TODO replace this with something that uses findfont, and caches and
	// refcounts the faces
	faceSet := fallbackFaces.New()
	this.backend.SetFaceSet(faceSet)
	return nil
}