From 5051a19c7f9fcb402335ae0f3a6d003e167c17a2 Mon Sep 17 00:00:00 2001
From: pnodet <paul.nodet@gmail.com>
Date: Sat, 28 Dec 2024 21:06:34 +0100
Subject: [PATCH] feat: add basic state keep

---
 src/apprt/glfw.zig          | 24 +++++++++++++++++
 src/terminal/closedtabs.zig | 53 +++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100644 src/terminal/closedtabs.zig

diff --git a/src/apprt/glfw.zig b/src/apprt/glfw.zig
index cb2189339..e73cabbf8 100644
--- a/src/apprt/glfw.zig
+++ b/src/apprt/glfw.zig
@@ -23,6 +23,8 @@ const CoreSurface = @import("../Surface.zig");
 const configpkg = @import("../config.zig");
 const Config = @import("../config.zig").Config;
 
+const LastClosedTabs = @import("../terminal/closedtabs.zig").LastClosedTabs;
+
 // Get native API access on certain platforms so we can do more customization.
 const glfwNative = glfw.Native(.{
     .cocoa = builtin.target.isDarwin(),
@@ -38,6 +40,9 @@ pub const App = struct {
     /// Mac-specific state.
     darwin: if (Darwin.enabled) Darwin else void,
 
+    /// Store information about the last closed tabs
+    last_closed_tabs: LastClosedTabs = .{},
+
     pub const Options = struct {};
 
     pub fn init(core_app: *CoreApp, _: Options) !App {
@@ -105,6 +110,7 @@ pub const App = struct {
     }
 
     pub fn terminate(self: *App) void {
+        self.last_closed_tabs.deinit(self.app.alloc);
         self.config.deinit();
         glfw.terminate();
     }
@@ -604,6 +610,24 @@ pub const Surface = struct {
     }
 
     pub fn deinit(self: *Surface) void {
+        // Save the closing tab information
+        const title = if (self.title_text) |t|
+            self.core_surface.alloc.dupe(u8, t) catch null
+        else
+            null;
+        errdefer if (title) |t| self.core_surface.alloc.free(t);
+
+        const cwd = self.core_surface.alloc.dupe(u8, "~") catch null;
+        errdefer if (cwd) |c| self.core_surface.alloc.free(c);
+
+        self.app.last_closed_tabs.push(.{
+            .title = title,
+            .cwd = cwd,
+        }, self.core_surface.alloc);
+
+        log.debug("all last closed tab: {?}", .{self.app.last_closed_tabs.this});
+        log.debug("last closed tab: {?}", .{self.app.last_closed_tabs.getLast()});
+
         if (self.title_text) |t| self.core_surface.alloc.free(t);
 
         // Remove ourselves from the list of known surfaces in the app.
diff --git a/src/terminal/closedtabs.zig b/src/terminal/closedtabs.zig
new file mode 100644
index 000000000..6e0b0205b
--- /dev/null
+++ b/src/terminal/closedtabs.zig
@@ -0,0 +1,53 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+
+const max_closed_tabs = 10;
+
+pub const LastClosedTab = struct {
+    title: ?[]const u8,
+    cwd: ?[]const u8,
+
+    pub fn deinit(self: *LastClosedTab, alloc: Allocator) void {
+        if (self.title) |t| alloc.free(t);
+        if (self.cwd) |c| alloc.free(c);
+    }
+};
+
+pub const LastClosedTabs = struct {
+    this: std.BoundedArray(LastClosedTab, max_closed_tabs) = std.BoundedArray(LastClosedTab, max_closed_tabs).init(0) catch unreachable,
+
+    pub fn push(self: *LastClosedTabs, tab: LastClosedTab, alloc: Allocator) void {
+        if (self.this.len == max_closed_tabs) {
+            // Remove oldest tab and free its memory
+            self.this.buffer[0].deinit(alloc);
+            // Shift all elements left
+            for (0..self.this.len - 1) |i| {
+                self.this.buffer[i] = self.this.buffer[i + 1];
+            }
+            // Add new tab at the end
+            self.this.buffer[self.this.len - 1] = tab;
+        } else {
+            self.this.append(tab) catch unreachable;
+        }
+    }
+
+    pub fn deinit(self: *LastClosedTabs, alloc: Allocator) void {
+        for (0..self.this.len) |i| {
+            self.this.buffer[i].deinit(alloc);
+        }
+        self.this.len = 0;
+    }
+
+    pub fn get(self: *LastClosedTabs, index: usize) ?*LastClosedTab {
+        return self.this.get(index);
+    }
+
+    pub fn len(self: *LastClosedTabs) usize {
+        return self.this.len;
+    }
+
+    pub fn getLast(self: *LastClosedTabs) ?*LastClosedTab {
+        if (self.this.len == 0) return null;
+        return &self.this.buffer[self.this.len - 1];
+    }
+};