Null objects

src/text_editor/text_editor.cpp

@@ -81,6 +81,19 @@ int main(void) {
     Font            = LoadFontEx("c:\\Windows\\Fonts\\consola.ttf", (int)FontSize, NULL, 500);
     FontCharSpacing = GetCharSpacing(Font, FontSize, FontSpacing);
 
+    // Create null
+    {
+        CreateBuffer(GetSystemAllocator());
+
+        View view = {AllocViewID()};
+        Add(&view.carets, {0, 0});
+        Add(&Views, view);
+
+        Window window = {AllocWindowID()};
+        Add(&window.views, {0});
+        Add(&Windows, window);
+    }
+
     {
         Window window = {AllocWindowID()};
         {
@@ -99,8 +112,7 @@ int main(void) {
     {
         Window window = {AllocWindowID()};
         {
-            View view = {};
+            View view = {AllocViewID()};
-            view.id   = AllocViewID();
             Add(&view.carets, {0, 0});
             view.buffer_id = CreateBuffer(Perm);
             Buffer *buffer = GetBuffer(view.buffer_id);
@@ -133,25 +145,27 @@ int main(void) {
         Rect2I screen_rect       = GetScreenRect();
         float  line_numbers_size = MeasureTextEx(Font, "12345", (float)FontSize, (float)FontSpacing).x;
         {
-            Windows[0].total_rect        = CutLeft(&screen_rect, (Int)((double)GetSize(screen_rect).x * 0.33));
+            Windows[1].total_rect        = CutLeft(&screen_rect, (Int)((double)GetSize(screen_rect).x * 0.33));
-            Windows[0].document_rect     = Windows[0].total_rect;
-            Windows[0].scrollbar_rect    = CutRight(&Windows[0].document_rect, 10);
-            Windows[0].infobar_rect      = CutBottom(&Windows[0].document_rect, (Int)MenuFontSize);
-            Windows[0].line_numbers_rect = CutLeft(&Windows[0].document_rect, (Int)line_numbers_size);
-        }
-        {
-            Windows[1].total_rect        = CutLeft(&screen_rect, (Int)((double)GetSize(screen_rect).x * 0.5));
             Windows[1].document_rect     = Windows[1].total_rect;
             Windows[1].scrollbar_rect    = CutRight(&Windows[1].document_rect, 10);
             Windows[1].infobar_rect      = CutBottom(&Windows[1].document_rect, (Int)MenuFontSize);
             Windows[1].line_numbers_rect = CutLeft(&Windows[1].document_rect, (Int)line_numbers_size);
         }
         {
-            Windows[2].total_rect        = CutLeft(&screen_rect, (Int)((double)GetSize(screen_rect).x * 1.0));
+            int i                        = 2;
-            Windows[2].document_rect     = Windows[2].total_rect;
+            Windows[i].total_rect        = CutLeft(&screen_rect, (Int)((double)GetSize(screen_rect).x * 0.5));
-            Windows[2].scrollbar_rect    = CutRight(&Windows[2].document_rect, 10);
+            Windows[i].document_rect     = Windows[i].total_rect;
-            Windows[2].infobar_rect      = CutBottom(&Windows[2].document_rect, (Int)MenuFontSize);
+            Windows[i].scrollbar_rect    = CutRight(&Windows[i].document_rect, 10);
-            Windows[2].line_numbers_rect = CutLeft(&Windows[2].document_rect, (Int)line_numbers_size);
+            Windows[i].infobar_rect      = CutBottom(&Windows[i].document_rect, (Int)MenuFontSize);
+            Windows[i].line_numbers_rect = CutLeft(&Windows[i].document_rect, (Int)line_numbers_size);
+        }
+        {
+            int i                        = 3;
+            Windows[i].total_rect        = CutLeft(&screen_rect, (Int)((double)GetSize(screen_rect).x * 1.0));
+            Windows[i].document_rect     = Windows[i].total_rect;
+            Windows[i].scrollbar_rect    = CutRight(&Windows[i].document_rect, 10);
+            Windows[i].infobar_rect      = CutBottom(&Windows[i].document_rect, (Int)MenuFontSize);
+            Windows[i].line_numbers_rect = CutLeft(&Windows[i].document_rect, (Int)line_numbers_size);
         }
 
         BeginDrawing();

src/text_editor/text_editor.h

@@ -70,13 +70,13 @@ Rect2I   GetVisibleCells(Window &window);
 void     AfterEdit(View *view, Array<Edit> edits);
 Scroller ComputeScrollerRect(Window &window);
 
-WindowID WindowIDs = {1};
+WindowID WindowIDs = {0};
-BufferID BufferIDs = {1};
+BufferID BufferIDs = {0};
-ViewID   ViewIDs   = {1};
+ViewID   ViewIDs   = {0};
 
-Window NullWindow = {};
+WindowID NullWindowID = {0};
-View   NullView   = {};
+BufferID NullBufferID = {0};
-Buffer NullBuffer = {};
+ViewID   NullViewID   = {0};
 
 Array<Buffer> Buffers      = {};
 Array<View>   Views        = {};
@@ -85,17 +85,17 @@ WindowID      ActiveWindow = {};
 
 inline Window *GetWindow(WindowID id) {
     For(Windows) if (it.id.id == id.id) return &it;
-    return &NullWindow;
+    return &Windows[0];
 }
 
 inline Buffer *GetBuffer(BufferID id) {
     For(Buffers) if (it.id.id == id.id) return &it;
-    return &NullBuffer;
+    return &Buffers[0];
 }
 
 inline View *GetView(ViewID id) {
     For(Views) if (it.id.id == id.id) return &it;
-    return &NullView;
+    return &Views[0];
 }
 
 inline ViewID   AllocViewID() { return {ViewIDs.id++}; }