Initial commit

6 files changed, 283 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..16d3c4d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.cache
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..0d6154b
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1760878510,
+        "narHash": "sha256-K5Osef2qexezUfs0alLvZ7nQFTGS9DL2oTVsIXsqLgs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "5e2a59a5b1a82f89f2c7e598302a9cacebb72a67",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..2be9687
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,68 @@
+{
+  description = "Minimal Gio (gioui.org) development environment with Go support";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+      ...
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          config.allowUnfree = true;
+        };
+
+        gioDeps = with pkgs; [
+          go
+          gopls
+          git
+          pkg-config
+          # X11 + Wayland deps
+          xorg.libX11
+          xorg.libXcursor
+          xorg.libXrandr
+          xorg.libXinerama
+          xorg.libXi
+          xorg.libXext
+          libGL
+          wayland
+          wayland-protocols
+          libxkbcommon
+          # Text rendering
+          cairo
+          pango
+          harfbuzz
+          freetype
+          fontconfig
+        ];
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          name = "gio-dev";
+          packages = gioDeps;
+
+          shellHook = ''
+            export CGO_ENABLED=1
+            export PKG_CONFIG_PATH=${pkgs.lib.makeSearchPath "lib/pkgconfig" gioDeps}
+            export GIO_USE_WAYLAND=1
+            echo "✅ Gio development shell ready."
+            echo "Run 'go run .' to start your app."
+          '';
+        };
+
+        apps.default = {
+          type = "app";
+          program = "${pkgs.go}/bin/go run .";
+        };
+      }
+    );
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..3b20ab9
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,17 @@
+module copper
+
+go 1.24.6
+
+require (
+	gioui.org v0.9.0
+	golang.org/x/net v0.39.0
+)
+
+require (
+	gioui.org/shader v1.0.8 // indirect
+	github.com/go-text/typesetting v0.3.0 // indirect
+	golang.org/x/exp/shiny v0.0.0-20250408133849-7e4ce0ab07d0 // indirect
+	golang.org/x/image v0.26.0 // indirect
+	golang.org/x/sys v0.33.0 // indirect
+	golang.org/x/text v0.24.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..cb8d10f
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,23 @@
+eliasnaur.com/font v0.0.0-20230308162249-dd43949cb42d h1:ARo7NCVvN2NdhLlJE9xAbKweuI9L6UgfTbYb0YwPacY=
+eliasnaur.com/font v0.0.0-20230308162249-dd43949cb42d/go.mod h1:OYVuxibdk9OSLX8vAqydtRPP87PyTFcT9uH3MlEGBQA=
+gioui.org v0.9.0 h1:4u7XZwnb5kzQW91Nz/vR0wKD6LdW9CaVF96r3rfy4kc=
+gioui.org v0.9.0/go.mod h1:CjNig0wAhLt9WZxOPAusgFD8x8IRvqt26LdDBa3Jvao=
+gioui.org/cpu v0.0.0-20210808092351-bfe733dd3334/go.mod h1:A8M0Cn5o+vY5LTMlnRoK3O5kG+rH0kWfJjeKd9QpBmQ=
+gioui.org/shader v1.0.8 h1:6ks0o/A+b0ne7RzEqRZK5f4Gboz2CfG+mVliciy6+qA=
+gioui.org/shader v1.0.8/go.mod h1:mWdiME581d/kV7/iEhLmUgUK5iZ09XR5XpduXzbePVM=
+github.com/go-text/typesetting v0.3.0 h1:OWCgYpp8njoxSRpwrdd1bQOxdjOXDj9Rqart9ML4iF4=
+github.com/go-text/typesetting v0.3.0/go.mod h1:qjZLkhRgOEYMhU9eHBr3AR4sfnGJvOXNLt8yRAySFuY=
+github.com/go-text/typesetting-utils v0.0.0-20241103174707-87a29e9e6066 h1:qCuYC+94v2xrb1PoS4NIDe7DGYtLnU2wWiQe9a1B1c0=
+github.com/go-text/typesetting-utils v0.0.0-20241103174707-87a29e9e6066/go.mod h1:DDxDdQEnB70R8owOx3LVpEFvpMK9eeH1o2r0yZhFI9o=
+golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0 h1:R84qjqJb5nVJMxqWYb3np9L5ZsaDtB+a39EqjV0JSUM=
+golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0/go.mod h1:S9Xr4PYopiDyqSyp5NjCrhFrqg6A5zA2E/iPHPhqnS8=
+golang.org/x/exp/shiny v0.0.0-20250408133849-7e4ce0ab07d0 h1:tMSqXTK+AQdW3LpCbfatHSRPHeW6+2WuxaVQuHftn80=
+golang.org/x/exp/shiny v0.0.0-20250408133849-7e4ce0ab07d0/go.mod h1:ygj7T6vSGhhm/9yTpOQQNvuAUFziTH7RUiH74EoE2C8=
+golang.org/x/image v0.26.0 h1:4XjIFEZWQmCZi6Wv8BoxsDhRU3RVnLX04dToTDAEPlY=
+golang.org/x/image v0.26.0/go.mod h1:lcxbMFAovzpnJxzXS3nyL83K27tmqtKzIJpctK8YO5c=
+golang.org/x/net v0.39.0 h1:ZCu7HMWDxpXpaiKdhzIfaltL9Lp31x/3fCP11bc6/fY=
+golang.org/x/net v0.39.0/go.mod h1:X7NRbYVEA+ewNkCNyJ513WmMdQ3BineSwVtN2zD/d+E=
+golang.org/x/sys v0.33.0 h1:q3i8TbbEz+JRD9ywIRlyRAQbM0qF7hu24q3teo2hbuw=
+golang.org/x/sys v0.33.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/text v0.24.0 h1:dd5Bzh4yt5KYA8f9CJHCP4FB4D51c2c6JvN37xJJkJ0=
+golang.org/x/text v0.24.0/go.mod h1:L8rBsPeo2pSS+xqN0d5u2ikmjtmoJbDBT1b7nHvFCdU=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..7b55ae3
--- /dev/null
+++ b/main.go
@@ -0,0 +1,113 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	"golang.org/x/net/html"
+
+	"gioui.org/app"
+	"gioui.org/font/gofont"
+	"gioui.org/io/system"
+	"gioui.org/layout"
+	"gioui.org/op"
+	"gioui.org/unit"
+	"gioui.org/widget/material"
+)
+
+// FeedItem represents a single RSS entry
+type FeedItem struct {
+	Title string
+	Link  string
+}
+
+// Simple RSS fetcher (parses only <item><title> and <link>)
+func fetchRSS(url string) ([]FeedItem, error) {
+	resp, err := http.Get(url)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	doc, err := html.Parse(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	var items []FeedItem
+	var f func(*html.Node)
+	f = func(n *html.Node) {
+		if n.Type == html.ElementNode && n.Data == "item" {
+			var item FeedItem
+			for c := n.FirstChild; c != nil; c = c.NextSibling {
+				if c.Type == html.ElementNode {
+					switch c.Data {
+					case "title":
+						if c.FirstChild != nil {
+							item.Title = c.FirstChild.Data
+						}
+					case "link":
+						if c.FirstChild != nil {
+							item.Link = c.FirstChild.Data
+						}
+					}
+				}
+			}
+			items = append(items, item)
+		}
+		for c := n.FirstChild; c != nil; c = c.NextSibling {
+			f(c)
+		}
+	}
+	f(doc)
+	return items, nil
+}
+
+func main() {
+	go func() {
+		w := app.NewWindow(
+			app.Title("MiniRSS"),
+			app.Size(unit.Dp(400), unit.Dp(600)),
+		)
+		if err := loop(w); err != nil {
+			log.Fatal(err)
+		}
+		os.Exit(0)
+	}()
+	app.Main()
+}
+
+func loop(w *app.Window) error {
+	th := material.NewTheme(gofont.Collection())
+
+	// Replace with any RSS feed you want to test
+	feedURL := "https://xkcd.com/atom.xml"
+	items, err := fetchRSS(feedURL)
+	if err != nil {
+		return fmt.Errorf("failed to fetch RSS: %w", err)
+	}
+
+	list := layout.List{
+		Axis: layout.Vertical,
+	}
+
+	var ops op.Ops
+	for {
+		e := <-w.Events()
+		switch e := e.(type) {
+		case system.DestroyEvent:
+			return e.Err
+		case system.FrameEvent:
+			gtx := layout.NewContext(&ops, e)
+
+			list.Layout(gtx, len(items), func(gtx layout.Context, i int) layout.Dimensions {
+				title := material.H6(th, items[i].Title)
+				return title.Layout(gtx)
+			})
+
+			e.Frame(gtx.Ops)
+		}
+	}
+}