Allow renaming of towns during gameplay

CHANGELOG.md

@@ -0,0 +1,4 @@
+0.1.0 (in development)
+------------------------------------------------------------------------
+- Feature: Towns can now always be renamed (As seen in OpenTTD).
+- Feature: Playable in a resizable window.

src/openloco/interop/hooks.cpp

@@ -48,6 +48,13 @@ void register_hooks()
             return 0;
         });
 
+    register_hook(0x00498E9B,
+        [](registers &regs) -> uint8_t
+        {
+            openloco::ui::windows::sub_498E9B((openloco::ui::window *)regs.esi);
+            return 0;
+        });
+
     // Remove the set window pos function, we do not want it as it
     // keeps moving the process window to 0, 0
     // Can be removed when windowmgr:update() is hooked

src/openloco/openloco.cpp

@@ -63,6 +63,11 @@ namespace openloco
         return glpCmdLine;
     }
 
+    bool is_editor_mode()
+    {
+        return (_screen_flags & screen_flags::editor) != 0;
+    }
+
     bool is_paused()
     {
         return paused_state;

src/openloco/openloco.h

@@ -16,6 +16,8 @@ namespace openloco
 
     void * hInstance();
     const char * lpCmdLine();
+    bool is_editor_mode();
+    bool is_paused();
 
     void prompt_tick_loop(std::function<bool()> tickAction);
     void sub_48A18C();

src/openloco/openloco.vcxproj

@@ -33,6 +33,7 @@
     <ClCompile Include="windows\promptbrowsewnd.cpp" />
     <ClCompile Include="windows\promptokcancelwnd.cpp" />
     <ClCompile Include="windows\textinputwnd.cpp" />
+    <ClCompile Include="windows\townwnd.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="audio\audio.h" />

src/openloco/windowmgr.h

@@ -42,8 +42,12 @@ namespace openloco::ui::windows
         save = 2
     };
 
+    window * open_town_window(uint16_t townId);
+    void sub_498E9B(window * w);
+
     bool prompt_browse(browse_type type, char * path, const char * filter, const char * title);
     bool prompt_ok_cancel(string_id okButtonStringId);
+
 }
 
 namespace openloco::ui::textinput

src/openloco/windows/townwnd.cpp

@@ -0,0 +1,29 @@
+#include "../interop/interop.hpp"
+#include "../openloco.h"
+#include "../windowmgr.h"
+
+namespace openloco::ui::windows
+{
+    // 0x00498E9B
+    void sub_498E9B(window * w)
+    {
+        w->enabled_widgets |= 2;
+#ifdef _DISABLE_TOWN_RENAME_
+        if (is_editor_mode())
+        {
+            w->enabled_widgets &= ~2;
+        }
+#endif
+    }
+
+    // 0x00446F6B
+    // dx: townId
+    // esi: {return}
+    window * open_town_window(uint16_t townId)
+    {
+        registers regs;
+        regs.dx = townId;
+        LOCO_CALLPROC_X(0x00446F6B, regs);
+        return (window *)regs.esi;
+    }
+}