From f027ebe2aaaa8da1171bba81e750fed494557d99 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mirek=20Wr=C3=B3bel?= <mirek@wrobel.it>
Date: Wed, 14 Oct 2026 22:21:09 +0200
Subject: [PATCH] Resizable sidebar remembered in settings.json; nest tags by /
 like branches

---
 src-tauri/src/lib.rs       | 19 ++++++++++++-
 src-tauri/src/settings.rs  | 26 ++++++++++++++++++
 src/App.vue                | 55 ++++++++++++++++++++++++++++++++++++++
 src/components/RefTree.vue | 14 +++++-----
 src/components/Sidebar.vue |  5 ++--
 src/lib/tree.test.ts       |  7 +++++
 src/lib/tree.ts            | 14 +++++++---
 7 files changed, 127 insertions(+), 13 deletions(-)
 create mode 100644 src-tauri/src/settings.rs

diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index f8bc4e4..67fcac3 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -1,5 +1,6 @@
 mod filters;
 mod git;
+mod settings;
 
 use std::path::PathBuf;
 
@@ -21,6 +22,16 @@ fn save_filters(repo: String, value: serde_json::Value) -> Result<(), String> {
     filters::save(&repo, value)
 }
 
+#[tauri::command]
+fn load_settings() -> Result<serde_json::Value, String> {
+    settings::load()
+}
+
+#[tauri::command]
+fn save_settings(value: serde_json::Value) -> Result<(), String> {
+    settings::save(value)
+}
+
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     let path = std::env::args_os()
@@ -31,7 +42,13 @@ pub fn run() {
     tauri::Builder::default()
         .plugin(tauri_plugin_clipboard_manager::init())
         .manage(RepoArg(path))
-        .invoke_handler(tauri::generate_handler![load_repo, load_filters, save_filters])
+        .invoke_handler(tauri::generate_handler![
+            load_repo,
+            load_filters,
+            save_filters,
+            load_settings,
+            save_settings
+        ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
 }
diff --git a/src-tauri/src/settings.rs b/src-tauri/src/settings.rs
new file mode 100644
index 0000000..54ec158
--- /dev/null
+++ b/src-tauri/src/settings.rs
@@ -0,0 +1,26 @@
+//! App-wide settings, such as the sidebar width, in `~/.local/share/gites/settings.json`.
+
+use serde_json::Value;
+use std::path::PathBuf;
+
+fn file() -> Result<PathBuf, String> {
+    Ok(dirs::data_dir().ok_or("no data folder found")?.join("gites").join("settings.json"))
+}
+
+pub fn load() -> Result<Value, String> {
+    let path = file()?;
+    match std::fs::read_to_string(&path) {
+        Ok(text) => Ok(serde_json::from_str(&text).unwrap_or(Value::Null)),
+        Err(e) if e.kind() == std::io::ErrorKind::NotFound => Ok(Value::Null),
+        Err(e) => Err(format!("could not read {}: {e}", path.display())),
+    }
+}
+
+pub fn save(value: Value) -> Result<(), String> {
+    let path = file()?;
+    if let Some(dir) = path.parent() {
+        std::fs::create_dir_all(dir).map_err(|e| e.to_string())?;
+    }
+    let text = serde_json::to_string_pretty(&value).map_err(|e| e.to_string())?;
+    std::fs::write(&path, text).map_err(|e| format!("could not write {}: {e}", path.display()))
+}
diff --git a/src/App.vue b/src/App.vue
index 42ffb0c..3b2b0bf 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -25,6 +25,48 @@ const selected = ref(0);
 const toast = ref<string | null>(null);
 const sidebar = ref<InstanceType<typeof Sidebar>>();
 
+// ---- settings: the sidebar width -------------------------------------------
+
+const SIDEBAR_MIN = 160;
+const SIDEBAR_MAX = 700;
+const sidebarWidth = ref(270);
+let settingsLoaded = false;
+
+async function loadSettings() {
+  const saved = await invoke<{ sidebarWidth?: number } | null>("load_settings").catch(() => null);
+  if (typeof saved?.sidebarWidth === "number") {
+    sidebarWidth.value = Math.min(SIDEBAR_MAX, Math.max(SIDEBAR_MIN, saved.sidebarWidth));
+  }
+  settingsLoaded = true;
+}
+
+let settingsTimer: number | undefined;
+watch(sidebarWidth, () => {
+  if (!settingsLoaded) return;
+  clearTimeout(settingsTimer);
+  settingsTimer = window.setTimeout(() => {
+    invoke("save_settings", { value: { sidebarWidth: sidebarWidth.value } }).catch((e) =>
+      showToast(`could not save settings: ${e}`),
+    );
+  }, 300);
+});
+
+function startResize(e: PointerEvent) {
+  const handle = e.currentTarget as HTMLElement;
+  handle.setPointerCapture(e.pointerId);
+  const startX = e.clientX;
+  const startWidth = sidebarWidth.value;
+  const move = (ev: PointerEvent) => {
+    sidebarWidth.value = Math.min(SIDEBAR_MAX, Math.max(SIDEBAR_MIN, startWidth + ev.clientX - startX));
+  };
+  const stop = () => {
+    handle.removeEventListener("pointermove", move);
+    handle.removeEventListener("pointerup", stop);
+  };
+  handle.addEventListener("pointermove", move);
+  handle.addEventListener("pointerup", stop);
+}
+
 // ---- loading and saving -------------------------------------------------
 
 let filtersLoadedFor: string | null = null;
@@ -228,6 +270,7 @@ onMounted(() => {
     viewWidth.value = scroller.value?.clientWidth ?? 1000;
   });
   if (scroller.value) resizeObserver.observe(scroller.value);
+  loadSettings();
   load();
 });
 onUnmounted(() => {
@@ -270,8 +313,10 @@ onUnmounted(() => {
         :filters="filters"
         :head-ref="repo.head_ref"
         :time-of="timeOf"
+        :style="{ width: sidebarWidth + 'px' }"
         @jump="jumpTo"
       />
+      <div v-if="repo" class="splitter" title="drag to resize" @pointerdown.prevent="startResize" />
 
       <div v-if="error" class="error">
         <h2>Could not open the repository</h2>
@@ -372,6 +417,16 @@ onUnmounted(() => {
 .collapse:disabled { opacity: 0.4; cursor: default; background: none; }
 .collapse.on { border-color: var(--accent); color: var(--accent); background: #b197fc1a; }
 .main { flex: 1; display: flex; min-height: 0; }
+.splitter {
+  flex: none;
+  width: 5px;
+  margin-left: -3px;
+  margin-right: -2px;
+  cursor: col-resize;
+  position: relative;
+  z-index: 5;
+}
+.splitter:hover, .splitter:active { background: var(--accent); opacity: 0.6; }
 .list { flex: 1; overflow: auto; position: relative; }
 .spacer-rows { position: relative; min-width: 700px; }
 .row {
diff --git a/src/components/RefTree.vue b/src/components/RefTree.vue
index bd1ebde..a295fa0 100644
--- a/src/components/RefTree.vue
+++ b/src/components/RefTree.vue
@@ -19,8 +19,10 @@ const emit = defineEmits<{ jump: [ref: Ref]; toggle: [names: string[]] }>();
 const allHidden = (n: TreeNode) => refsUnder(n).every((r) => props.filters.hidden.includes(r.name));
 const anyVisible = (n: TreeNode) => refsUnder(n).some((r) => isRefVisible(r.name, props.filters));
 
-function toggleFolder(path: string) {
-  if (!props.closed.delete(path)) props.closed.add(path);
+// Keyed by kind too, so a `backup` tag folder and a `backup` branch folder are separate.
+const key = (n: TreeNode) => `${props.kind}:${n.path}`;
+function toggleFolder(n: TreeNode) {
+  if (!props.closed.delete(key(n))) props.closed.add(key(n));
 }
 </script>
 
@@ -30,13 +32,13 @@ function toggleFolder(path: string) {
       class="item"
       :class="{ off: !anyVisible(n), head: n.ref?.name === headRef, folder: n.children.length }"
       :style="{ paddingLeft: 10 + depth * 14 + 'px' }"
-      @click="n.ref ? emit('jump', n.ref) : toggleFolder(n.path)"
+      @click="n.ref ? emit('jump', n.ref) : toggleFolder(n)"
     >
       <span
         v-if="n.children.length"
         class="arrow"
-        :class="{ open: !closed.has(n.path) }"
-        @click.stop="toggleFolder(n.path)"
+        :class="{ open: !closed.has(key(n)) }"
+        @click.stop="toggleFolder(n)"
       >▸</span>
       <span v-else class="arrow" />
       <RefIcon v-if="n.ref" :kind="kind" />
@@ -47,7 +49,7 @@ function toggleFolder(path: string) {
       <EyeButton :shut="allHidden(n)" @click.stop="emit('toggle', refsUnder(n).map((r) => r.name))" />
     </div>
     <RefTree
-      v-if="n.children.length && !closed.has(n.path)"
+      v-if="n.children.length && !closed.has(key(n))"
       :nodes="n.children"
       :kind="kind"
       :depth="depth + 1"
diff --git a/src/components/Sidebar.vue b/src/components/Sidebar.vue
index 94f3850..5c431c5 100644
--- a/src/components/Sidebar.vue
+++ b/src/components/Sidebar.vue
@@ -34,7 +34,7 @@ const byKind = computed(() => {
 
 const trees = computed((): Record<RefKind, TreeNode[]> => {
   const tree = (refs: Ref[]) => buildTree(refs.map((ref) => ({ short: shortName(ref.name), ref })));
-  // Tags stay a flat list, newest first; equal times fall back to the higher version.
+  // Tags are newest first; equal times fall back to the higher version.
   const tags = [...byKind.value.tag].sort(
     (a, b) =>
       props.timeOf(b.target) - props.timeOf(a.target) ||
@@ -43,7 +43,7 @@ const trees = computed((): Record<RefKind, TreeNode[]> => {
   return {
     local: tree(byKind.value.local),
     remote: tree(byKind.value.remote),
-    tag: tags.map((ref) => ({ label: shortName(ref.name), path: ref.name, children: [], ref })),
+    tag: buildTree(tags.map((ref) => ({ short: shortName(ref.name), ref })), true),
   };
 });
 
@@ -115,7 +115,6 @@ function onPatternKey(e: KeyboardEvent) {
 
 <style scoped>
 .side {
-  width: 270px;
   flex: none;
   background: var(--bg-side);
   border-right: 1px solid var(--border);
diff --git a/src/lib/tree.test.ts b/src/lib/tree.test.ts
index df8deb2..ba1480f 100644
--- a/src/lib/tree.test.ts
+++ b/src/lib/tree.test.ts
@@ -22,6 +22,13 @@ describe("buildTree", () => {
   });
 });
 
+describe("buildTree with keepOrder", () => {
+  it("keeps the given order, folders first, each folder placed by its first item", () => {
+    const t = buildTree(["v3", "backup/new", "v2", "backup/old", "rc/x"].map(item), true);
+    expect(shape(t)).toEqual([{ backup: ["new", "old"] }, { rc: ["x"] }, "v3", "v2"]);
+  });
+});
+
 describe("refsUnder", () => {
   it("collects every ref in a subtree", () => {
     const t = buildTree(["feat/a", "feat/b/c", "main"].map(item));
diff --git a/src/lib/tree.ts b/src/lib/tree.ts
index 8e3d0d0..fc1387c 100644
--- a/src/lib/tree.ts
+++ b/src/lib/tree.ts
@@ -10,8 +10,11 @@ export interface TreeNode {
   ref?: Ref;
 }
 
-/** Splits short names by `/` into a tree. Folders come before refs, each sorted by name. */
-export function buildTree(items: { short: string; ref: Ref }[]): TreeNode[] {
+/**
+ * Splits short names by `/` into a tree. Folders come before refs, each sorted by name,
+ * or, with `keepOrder`, in the order of `items` (a folder takes the place of its first item).
+ */
+export function buildTree(items: { short: string; ref: Ref }[], keepOrder = false): TreeNode[] {
   const root: TreeNode = { label: "", path: "", children: [] };
   for (const { short, ref } of items) {
     let node = root;
@@ -32,7 +35,12 @@ export function buildTree(items: { short: string; ref: Ref }[]): TreeNode[] {
     );
     nodes.forEach((n) => sort(n.children));
   };
-  sort(root.children);
+  const foldersFirst = (nodes: TreeNode[]) => {
+    // Array.prototype.sort is stable, so items keep their order within each group.
+    nodes.sort((a, b) => Number(b.children.length > 0) - Number(a.children.length > 0));
+    nodes.forEach((n) => foldersFirst(n.children));
+  };
+  (keepOrder ? foldersFirst : sort)(root.children);
   return root.children;
 }