76 lines
2.1 KiB
Go
76 lines
2.1 KiB
Go
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package fyne
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import (
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"io"
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"net/http"
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"os"
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"path/filepath"
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)
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// Resource represents a single binary resource, such as an image or font.
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// A resource has an identifying name and byte array content.
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// The serialised path of a resource can be obtained which may result in a
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// blocking filesystem write operation.
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type Resource interface {
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Name() string
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Content() []byte
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}
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// StaticResource is a bundled resource compiled into the application.
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// These resources are normally generated by the fyne_bundle command included in
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// the Fyne toolkit.
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type StaticResource struct {
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StaticName string
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StaticContent []byte
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}
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// Name returns the unique name of this resource, usually matching the file it
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// was generated from.
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func (r *StaticResource) Name() string {
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return r.StaticName
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}
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// Content returns the bytes of the bundled resource, no compression is applied
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// but any compression on the resource is retained.
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func (r *StaticResource) Content() []byte {
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return r.StaticContent
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}
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// NewStaticResource returns a new static resource object with the specified
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// name and content. Creating a new static resource in memory results in
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// sharable binary data that may be serialised to the system cache location.
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func NewStaticResource(name string, content []byte) *StaticResource {
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return &StaticResource{
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StaticName: name,
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StaticContent: content,
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}
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}
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// LoadResourceFromPath creates a new StaticResource in memory using the contents of the specified file.
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func LoadResourceFromPath(path string) (Resource, error) {
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bytes, err := os.ReadFile(filepath.Clean(path))
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if err != nil {
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return nil, err
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}
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name := filepath.Base(path)
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return NewStaticResource(name, bytes), nil
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}
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// LoadResourceFromURLString creates a new StaticResource in memory using the body of the specified URL.
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func LoadResourceFromURLString(urlStr string) (Resource, error) {
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res, err := http.Get(urlStr)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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bytes, err := io.ReadAll(res.Body)
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if err != nil {
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return nil, err
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}
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name := filepath.Base(urlStr)
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return NewStaticResource(name, bytes), nil
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}
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