New splitting

src/text_editor/lua_api.cpp

@@ -378,6 +378,16 @@ int Lua_GetDir(lua_State *L) {
     return 1;
 }
 
+int Lua_SplitSize(lua_State *L) {
+    lua_Number num = lua_tonumber(L, 1);
+    lua_pop(L, 1);
+
+    BSet set = GetActiveMainSet();
+    WindowSplit *split = set.window->split_ref;
+    split->parent->value = num;
+    return 0;
+}
+
 static void HookLuaForceExit(lua_State *L, lua_Debug *debug) {
     SDL_PumpEvents();
     int            numkeys = 0;

src/text_editor/lua_api_generated.cpp

@@ -25,6 +25,7 @@ luaL_Reg LuaFunctions[] = {
     {"FileExists", Lua_FileExists},
     {"GetWorkingDir", Lua_GetWorkingDir},
     {"GetDir", Lua_GetDir},
+    {"SplitSize", Lua_SplitSize},
     {"Play", Lua_Play},
     {NULL, NULL},
 };

src/text_editor/window.cpp

@@ -60,10 +60,11 @@ Int GetTitleBarSize(Window *window) {
     return (Int)result;
 }
 
-WindowSplit *CreateSplitForWindow(Window *window) {
+WindowSplit *CreateSplitForWindow(WindowSplit *parent, Window *window) {
     WindowSplit *split = AllocType(Perm, WindowSplit);
     split->kind = WindowSplitKind_Window;
     split->window = window;
+    split->parent = parent;
     window->split_ref = split;
     return split;
 }
@@ -79,11 +80,12 @@ void SplitWindowEx(WindowSplit **node, WindowSplit *split, Window *target, Windo
         }
 
         WindowSplit *hori = AllocType(Perm, WindowSplit);
+        hori->parent = node[0]->parent;
         hori->kind = kind;
         hori->value_kind = ValueKind_Proportion;
         hori->value = 0.5;
         hori->left = *node;
-        hori->right = CreateSplitForWindow(new_window);
+        hori->right = CreateSplitForWindow(hori, new_window);
         *node = hori;
     }
 }
@@ -182,7 +184,7 @@ void InitWindows() {
         CreateTitlebar(window->id);
         CreateSearchBar(window->id);
 
-        split->left = CreateSplitForWindow(window);
+        split->left = CreateSplitForWindow(split, window);
     }
 
     {
@@ -195,7 +197,7 @@ void InitWindows() {
         CreateSearchBar(window->id);
         ActiveWindow = window->id;
 
-        split->right = CreateSplitForWindow(window);
+        split->right = CreateSplitForWindow(split, window);
     }