From d7e7f559562f681747792fb4c58ab070a9345127 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <m@mitchellh.com>
Date: Mon, 26 Aug 2024 20:09:45 -0700
Subject: [PATCH] apprt/gtk: support last_tab

---
 src/apprt/gtk/Surface.zig | 33 +++++++--------------------------
 src/apprt/gtk/Window.zig  |  7 +++++++
 2 files changed, 14 insertions(+), 26 deletions(-)

diff --git a/src/apprt/gtk/Surface.zig b/src/apprt/gtk/Surface.zig
index 7ae690ce5..8e393a2bc 100644
--- a/src/apprt/gtk/Surface.zig
+++ b/src/apprt/gtk/Surface.zig
@@ -795,31 +795,7 @@ pub fn hasTabs(self: *const Surface) bool {
     return window.hasTabs();
 }
 
-pub fn gotoPreviousTab(self: *Surface) void {
-    const window = self.container.window() orelse {
-        log.info(
-            "gotoPreviousTab invalid for container={s}",
-            .{@tagName(self.container)},
-        );
-        return;
-    };
-
-    window.gotoPreviousTab(self);
-}
-
-pub fn gotoNextTab(self: *Surface) void {
-    const window = self.container.window() orelse {
-        log.info(
-            "gotoNextTab invalid for container={s}",
-            .{@tagName(self.container)},
-        );
-        return;
-    };
-
-    window.gotoNextTab(self);
-}
-
-pub fn gotoTab(self: *Surface, n: usize) void {
+pub fn gotoTab(self: *Surface, tab: apprt.GotoTab) void {
     const window = self.container.window() orelse {
         log.info(
             "gotoTab invalid for container={s}",
@@ -828,7 +804,12 @@ pub fn gotoTab(self: *Surface, n: usize) void {
         return;
     };
 
-    window.gotoTab(n);
+    switch (tab) {
+        .previous => window.gotoPreviousTab(self),
+        .next => window.gotoNextTab(self),
+        .last => window.gotoLastTab(),
+        else => window.gotoTab(@intFromEnum(tab)),
+    }
 }
 
 pub fn setShouldClose(self: *Surface) void {
diff --git a/src/apprt/gtk/Window.zig b/src/apprt/gtk/Window.zig
index 1615b986f..9df7a04ed 100644
--- a/src/apprt/gtk/Window.zig
+++ b/src/apprt/gtk/Window.zig
@@ -288,6 +288,13 @@ pub fn gotoNextTab(self: *Window, surface: *Surface) void {
     self.focusCurrentTab();
 }
 
+/// Go to the next tab for a surface.
+pub fn gotoLastTab(self: *Window) void {
+    const max = c.gtk_notebook_get_n_pages(self.notebook) -| 1;
+    c.gtk_notebook_set_current_page(self.notebook, max);
+    self.focusCurrentTab();
+}
+
 /// Go to the specific tab index.
 pub fn gotoTab(self: *Window, n: usize) void {
     if (n == 0) return;