library: add SourceView example

src/Library/demos/Source View/main.blp

@@ -0,0 +1,24 @@
+using Gtk 4.0;
+using Adw 1;
+using GtkSource 5;
+
+Adw.StatusPage {
+  title: "Source View";
+  description: _("Widget that enables text-editing with advanced features like syntax highlighting");
+
+  Box {
+    orientation: vertical;
+    halign: center;
+
+    ScrolledWindow source_view {
+      height-request: 180;
+      width-request: 600;
+      has-frame: true;
+    }
+
+    LinkButton {
+      label: "API Reference";
+      uri: "https://gnome.pages.gitlab.gnome.org/gtksourceview/gtksourceview5/class.View.html";
+    }
+  }
+}

src/Library/demos/Source View/main.js

@@ -0,0 +1,25 @@
+import GtkSource from "gi://GtkSource";
+
+// Strictly speaking we don't _have_ to do this here since WorkBench does this for us.
+// However, you _have_ to call this once during the startup in your application - e.g. in GApplication::startup
+GtkSource.init();
+
+// Get the language we want to use
+const language_manager = GtkSource.LanguageManager.get_default();
+const language = language_manager.get_language("js");
+
+// Create the buffer - this holds the text that's used in the SourceView
+const buffer = GtkSource.Buffer.new_with_language(language);
+buffer.set_text('console.log("Hello World!");', -1);
+
+// Create the SourceView which displays the buffer's display
+const source_view = GtkSource.View.new({
+  auto_indent: true,
+  indent_width: 4,
+  buffer,
+  show_line_numbers: true,
+});
+
+// Add the SourceView to our ScrolledView so its displayed
+const scrolled_window = workbench.builder.get_object("scrolled_window");
+scrolled_window.set_child(source_view);

src/Library/demos/Source View/main.json

@@ -0,0 +1,7 @@
+{
+  "name": "Source View",
+  "category": "controls",
+  "description": "Widget that enables text-editing with advanced features like syntax highlighting",
+  "panels": ["code", "preview"],
+  "autorun": true
+}

src/Library/demos/Source View/main.vala

@@ -0,0 +1,23 @@
+#!/usr/bin/env -S vala workbench.vala --pkg gtk4 --pkg libadwaita-1 --pkg gtksourceview-5
+
+public void main () {
+    Gtk.init ();
+    GtkSource.init ();
+
+    // Get the language we want to use
+    var language_manager = GtkSource.LanguageManager.get_default();
+    var language = language_manager.get_language("js");
+    // Create the buffer - this holds the text that's used in the SourceView
+    var buffer = new GtkSource.Buffer.with_language(language);
+    buffer.set_text("console.log(\"Hello World!\");");
+
+    // Create the SourceView which displays the buffer's display
+    var source_view = new GtkSource.View.with_buffer(buffer);
+    source_view.auto_indent = true;
+    source_view.indent_width = 4;
+    source_view.show_line_numbers = true;
+
+    // Add the SourceView to our ScrolledView so its displayed
+    var scrolled_window = workbench.builder.get_object ("scrolled_window") as Gtk.ScrolledWindow;
+    scrolled_window.child = source_view;
+}

src/about.js

@@ -70,6 +70,7 @@ ${getBlueprintVersion()}
     "JCWasmx86 https://github.com/JCWasmx86",
     "Alex (PaladinDev) https://github.com/SpikedPaladin",
     "Diego Iván M.E https://github.com/Diego-Ivan",
+    "Rasmus Thomsen <oss@cogitri.dev>",
     "Marvin W https://github.com/mar-v-in",
     // Add yourself as
     // "John Doe",