From a44d2c53cae8f39975a7e2ecb7c254618aec4ae8 Mon Sep 17 00:00:00 2001
From: Gabriel Schneider <gbrls@0x4200.cafe>
Date: Mon, 29 Jun 2026 11:07:01 -0300
Subject: scrollbar

---
 main.zig | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

(limited to 'main.zig')

diff --git a/main.zig b/main.zig
index 60bc1290..1181daf7 100644
--- a/main.zig
+++ b/main.zig
@@ -81,6 +81,7 @@ fn readPty(io: std.Io, gpa: std.mem.Allocator, pty: std.Io.File, loop: *Loop) !v
 
 const nrows = 64;
 const ncols = 100;
+const term_x_padding = 3;
 
 pub fn main(init: std.process.Init) !void {
     const io = init.io;
@@ -139,6 +140,15 @@ pub fn main(init: std.process.Init) !void {
                 if (mouse.button == .wheel_up) {
                     term.screens.active.scroll(.{ .delta_row = -1 });
                 }
+
+                if (mouse.type == .press) {
+                    if (mouse.button == .left and mouse.col <= term_x_padding) {
+                        term.screens.active.scroll(.{ .delta_row = -(mouse.row) });
+                    }
+                    if (mouse.button == .right and mouse.col <= term_x_padding) {
+                        term.screens.active.scroll(.{ .delta_row = mouse.row });
+                    }
+                }
             },
             .key_press => |key| {
                 if (key.matches('c', .{ .ctrl = true })) {
@@ -191,12 +201,37 @@ pub fn main(init: std.process.Init) !void {
 
         const win_child = win.child(.{
             .border = .{ .where = .bottom },
+            .x_off = term_x_padding,
             .height = nrows + 2,
             .width = ncols + 2,
         });
+
+        const win_scroll = win.child(.{
+            .border = .{ .where = .none },
+            .height = nrows + 2,
+            .width = term_x_padding - 1,
+        });
+
+        const scroll_pos = (@as(usize, win_scroll.height) * term.screens.active.pages.scrollbar().offset) / term.screens.active.pages.scrollbar().total;
+        const scroll_height = @max(1, (@as(usize, win_scroll.height) * term.screens.active.pages.scrollbar().len) / term.screens.active.pages.scrollbar().total);
+
+        win_scroll.fill(.{
+            .char = .{ .grapheme = " " },
+            .style = .{ .bg = .{ .index = 4 } },
+        });
+
+        for (0..term_x_padding) |col| {
+            for (0..scroll_height) |row| {
+                win_scroll.writeCell(@intCast(col), @intCast(scroll_pos + row), .{
+                    .char = .{ .grapheme = " " },
+                    .style = .{ .bg = .{ .index = 0 }, .fg = .{ .index = 6 } },
+                });
+            }
+        }
+
         const win_dbg = win.child(.{
             .border = .{ .where = .all },
-            .x_off = ncols + 2,
+            .x_off = ncols + 2 + term_x_padding,
             .height = nrows + 2,
             .width = ncols + 2,
         });
@@ -207,9 +242,14 @@ pub fn main(init: std.process.Init) !void {
 
         const dbg_str = try std.fmt.bufPrintSentinel(
             &dbg_print_buf,
-            "c {} {}\npty pid {}\nwow it's working! debugging things will show here",
+            "c {} {}\npty pid {}\n wow it's working! debugging things will show here\n scroll {}/{} vis: {}\n",
             .{
-                pty_master.handle, term.screens.active.cursor.x, term.screens.active.cursor.y,
+                pty_master.handle,
+                term.screens.active.cursor.x,
+                term.screens.active.cursor.y,
+                term.screens.active.pages.scrollbar().offset,
+                term.screens.active.pages.scrollbar().total,
+                term.screens.active.pages.scrollbar().len,
             },
             0,
         );
-- 
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