From 613557a535e08d149fcd08bc474b1e99f572f0a1 Mon Sep 17 00:00:00 2001
From: Bastiaan van der Plaat <bastiaan.v.d.plaat@gmail.com>
Date: Sun, 27 Aug 2023 19:12:34 +0200
Subject: [PATCH] LibGUI: Add window remember state that loads and saves from
 config

---
 Userland/Libraries/LibGUI/Window.cpp | 40 ++++++++++++++++++++++++++++
 Userland/Libraries/LibGUI/Window.h   |  7 +++++
 2 files changed, 47 insertions(+)

diff --git a/Userland/Libraries/LibGUI/Window.cpp b/Userland/Libraries/LibGUI/Window.cpp
index d9d7d3c036..df4c7c491c 100644
--- a/Userland/Libraries/LibGUI/Window.cpp
+++ b/Userland/Libraries/LibGUI/Window.cpp
@@ -10,6 +10,7 @@
 #include <AK/JsonObject.h>
 #include <AK/NeverDestroyed.h>
 #include <AK/ScopeGuard.h>
+#include <LibConfig/Client.h>
 #include <LibCore/EventLoop.h>
 #include <LibCore/MimeData.h>
 #include <LibGUI/Action.h>
@@ -111,6 +112,8 @@ Window::~Window()
 void Window::close()
 {
     hide();
+    if (m_save_size_and_position_on_close)
+        save_size_and_position(m_save_domain, m_save_group);
     if (on_close)
         on_close();
 }
@@ -522,6 +525,43 @@ void Window::propagate_shortcuts(KeyEvent& event, Widget* widget, ShortcutPropag
     event.ignore();
 }
 
+void Window::restore_size_and_position(StringView domain, StringView group, Optional<Gfx::IntSize> fallback_size, Optional<Gfx::IntPoint> fallback_position)
+{
+    int x = Config::read_i32(domain, group, "X"sv, INT_MIN);
+    int y = Config::read_i32(domain, group, "Y"sv, INT_MIN);
+    if (x != INT_MIN && y != INT_MIN) {
+        move_to(x, y);
+    } else if (fallback_position.has_value()) {
+        move_to(fallback_position.release_value());
+    }
+
+    int width = Config::read_i32(domain, group, "Width"sv, INT_MIN);
+    int height = Config::read_i32(domain, group, "Height"sv, INT_MIN);
+    if (width != INT_MIN && height != INT_MIN) {
+        resize(width, height);
+    } else if (fallback_size.has_value()) {
+        resize(fallback_size.release_value());
+    }
+
+    set_maximized(Config::read_bool(domain, group, "Maximized"sv, false));
+}
+
+void Window::save_size_and_position(StringView domain, StringView group) const
+{
+    Config::write_i32(domain, group, "X"sv, x());
+    Config::write_i32(domain, group, "Y"sv, y());
+    Config::write_i32(domain, group, "Width"sv, width());
+    Config::write_i32(domain, group, "Height"sv, height());
+    Config::write_bool(domain, group, "Maximized"sv, is_maximized());
+}
+
+void Window::save_size_and_position_on_close(StringView domain, StringView group)
+{
+    m_save_size_and_position_on_close = true;
+    m_save_domain = domain;
+    m_save_group = group;
+}
+
 void Window::handle_key_event(KeyEvent& event)
 {
     if (!m_focused_widget && event.type() == Event::KeyDown && event.key() == Key_Tab && !event.ctrl() && !event.alt() && !event.super()) {
diff --git a/Userland/Libraries/LibGUI/Window.h b/Userland/Libraries/LibGUI/Window.h
index d67523b898..d298d1e0f8 100644
--- a/Userland/Libraries/LibGUI/Window.h
+++ b/Userland/Libraries/LibGUI/Window.h
@@ -240,6 +240,10 @@ public:
 
     void propagate_shortcuts(KeyEvent& event, Widget* widget, ShortcutPropagationBoundary = ShortcutPropagationBoundary::Application);
 
+    void restore_size_and_position(StringView domain, StringView group = "Window"sv, Optional<Gfx::IntSize> fallback_size = {}, Optional<Gfx::IntPoint> fallback_position = {});
+    void save_size_and_position(StringView domain, StringView group = "Window"sv) const;
+    void save_size_and_position_on_close(StringView domain, StringView group = "Window"sv);
+
 protected:
     Window(Core::EventReceiver* parent = nullptr);
     virtual void wm_event(WMEvent&);
@@ -323,6 +327,9 @@ private:
     bool m_blocks_emoji_input { false };
     bool m_resizing { false };
     bool m_auto_shrink { false };
+    bool m_save_size_and_position_on_close { false };
+    StringView m_save_domain;
+    StringView m_save_group;
 };
 
 }