Add Widget-Content-Frameless option to extension widget

docs/extensions.md

@@ -29,6 +29,9 @@ Used to specify the title of the widget. If not provided, the widget's title wil
 ### `Widget-Content-Type`
 Used to specify the content type that will be returned by the extension. If not provided, the content will be shown as plain text.
 
+### `Widget-Content-Frameless`
+When set to `true`, the widget's content will be displayed without the default background or "frame".
+
 ## Content Types
 
 > [!NOTE]

internal/glance/templates/extension.html

@@ -1,5 +1,7 @@
 {{ template "widget-base.html" . }}
 
+{{ define "widget-content-classes" }}{{ if .Extension.Frameless }}widget-content-frameless{{ end }}{{ end }}
+
 {{ define "widget-content" }}
 {{ .Extension.Content }}
 {{ end }}

internal/glance/widget-extension.go

@@ -76,8 +76,9 @@ var extensionStringToType = map[string]extensionType{
 }
 
 const (
-	extensionHeaderTitle       = "Widget-Title"
-	extensionHeaderContentType = "Widget-Content-Type"
+	extensionHeaderTitle            = "Widget-Title"
+	extensionHeaderContentType      = "Widget-Content-Type"
+	extensionHeaderContentFrameless = "Widget-Content-Frameless"
 )
 
 type extensionRequestOptions struct {
@@ -88,8 +89,9 @@ type extensionRequestOptions struct {
 }
 
 type extension struct {
-	Title   string
-	Content template.HTML
+	Title     string
+	Content   template.HTML
+	Frameless bool
 }
 
 func convertExtensionContent(options extensionRequestOptions, content []byte, contentType extensionType) template.HTML {
@@ -148,6 +150,10 @@ func fetchExtension(options extensionRequestOptions) (extension, error) {
 		}
 	}
 
+	if stringToBool(response.Header.Get(extensionHeaderContentFrameless)) {
+		extension.Frameless = true
+	}
+
 	extension.Content = convertExtensionContent(options, body, contentType)
 
 	return extension, nil