81 lines
1.3 KiB
Go
81 lines
1.3 KiB
Go
package main
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import (
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"embed"
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"io/ioutil"
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"path"
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"strings"
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)
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// Embed the built-in icons into the binary.
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//
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//go:embed icons/*
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var fs embed.FS
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// Icon implements a fyne.Resource and provides built-in icon data.
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type Icon struct {
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name string
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data []byte
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}
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func (i Icon) Empty() bool {
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return len(i.data) == 0
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}
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func (i Icon) Name() string {
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return i.name
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}
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func (i Icon) Content() []byte {
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return i.data
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}
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// A map of all the built-in icons by name.
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var (
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icons = map[string]Icon{}
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iconNames = []string{}
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)
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// LoadIcons parses the built-in icons into memory.
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func LoadIcons() {
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filenames, err := fs.ReadDir("icons")
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if err != nil {
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panic(err)
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}
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for _, icon := range filenames {
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basename := strings.TrimSuffix(icon.Name(), ".png")
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iconNames = append(iconNames, basename)
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// Populate the icons map too.
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if _, ok := icons[basename]; !ok {
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bin, err := fs.ReadFile("icons/" + icon.Name())
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if err != nil {
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panic(err)
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}
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i := Icon{
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name: basename,
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data: bin,
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}
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icons[basename] = i
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}
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}
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}
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// LoadCustomIcon adds a custom icon (PNG image) from disk.
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func LoadCustomIcon(filename string) (basename string, err error) {
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basename = path.Base(filename)
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data, err := ioutil.ReadFile(filename)
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if err != nil {
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return
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}
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i := Icon{
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name: basename,
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data: data,
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}
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icons[basename] = i
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return
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}
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