Improving window/view/buffer management

src/text_editor/commands.cpp

@@ -226,26 +226,3 @@ void HandleGlobalCommands() {
         SetActiveWindow({2});
     }
 }
-
-void ChangeActiveWindowAndScroll(Array<Int> &order) {
-    For(order) {
-        Window *window = &Windows[it];
-        View   *view   = GetActiveView(window);
-
-        Vec2 mouse           = GetMousePosition();
-        bool mouse_in_window = CheckCollisionPointRec(mouse, ToRectangle(window->total_rect));
-        if (mouse_in_window) {
-            if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
-                SetActiveWindow(window->id);
-            }
-            if (LastFrameIDWhenSwitchedActiveWindow != FrameID) {
-                if (IsKeyDown(KEY_F1)) {
-                    view->scroll.x -= (Int)(GetMouseWheelMove() * 48);
-                } else {
-                    view->scroll.y -= (Int)(GetMouseWheelMove() * 48);
-                }
-                LastFrameIDWhenSwitchedActiveWindow = FrameID;
-            }
-        }
-    }
-}

src/text_editor/commands_window.cpp

@@ -507,4 +507,27 @@ void HandleWindowBindings(Window *window) {
         // calculating this value incrementally but do we even need X scrollbar or x clipping?
         view.scroll.x = ClampBottom(view.scroll.x, (Int)0);
     }
-}
+}
+
+void ChangeActiveWindowAndScroll(Array<Int> &order) {
+    For(order) {
+        Window *window = &Windows[it];
+        View   *view   = GetActiveView(window);
+
+        Vec2 mouse           = GetMousePosition();
+        bool mouse_in_window = CheckCollisionPointRec(mouse, ToRectangle(window->total_rect));
+        if (mouse_in_window) {
+            if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
+                SetActiveWindow(window->id);
+            }
+            if (LastFrameIDWhenSwitchedActiveWindow != FrameID) {
+                if (IsKeyDown(KEY_F1)) {
+                    view->scroll.x -= (Int)(GetMouseWheelMove() * 48);
+                } else {
+                    view->scroll.y -= (Int)(GetMouseWheelMove() * 48);
+                }
+                LastFrameIDWhenSwitchedActiveWindow = FrameID;
+            }
+        }
+    }
+}

src/text_editor/lua_api.cpp

@@ -3,10 +3,8 @@ lua_State *LuaState = NULL;
 int LuaOpenFile(lua_State *L) {
     const char *text = luaL_checkstring(L, 1);
 
-    View   *view   = ViewOpenFile(text);
     Window *window = GetWindow(LastActiveWindow);
-    AddView(window, view->id);
-    window->active_view = view->id;
+    View   *view   = ViewOpenFile(window, text);
     SetActiveWindow(window->id);
     return 0; // number of results
 }

src/text_editor/management.cpp

@@ -18,9 +18,7 @@ inline View *GetView(ViewID id) {
     return &Views[0];
 }
 
-inline bool IsNull(Buffer *buffer) { return buffer->id.id == NullBufferID.id; }
-
-void           SetActiveWindow(WindowID window);
+inline bool    IsNull(Buffer *buffer) { return buffer->id.id == NullBufferID.id; }
 inline bool    IsActive(Window *window) { return window->id.id == ActiveWindow.id; }
 inline bool    IsActive(Window *window, View *view) { return window->active_view.id == view->id.id; }
 inline Window *GetActiveWindow() { return GetWindow(ActiveWindow); }
@@ -145,40 +143,50 @@ Buffer *BufferOpenFile(String path) {
     }
 }
 
-View *ViewOpenFile(String name) {
-    // if there is no view for this file, create one
-    View *view = FindViewWithBufferName(name);
-    if (!view) {
-        Buffer *buffer = BufferOpenFile(name);
-        if (IsNull(buffer)) Assert(0); // @todo
-        view = CreateView(buffer->id);
-        return view;
-    }
+View *_WindowOpenViewAndBuffer(Window *window, String name, bool set_active = true) {
+    Buffer *buffer = BufferOpenFile(name);
+    if (IsNull(buffer)) Assert(0); // @todo
+    View *view = CreateView(buffer->id);
+    Add(&window->views, view->id);
+    if (set_active) window->active_view = view->id;
+    return view;
+}
 
-    // If there is a buffer and view for this file then figure out
-    // if we need another view or can we reuse
-    Window *window = FindParentWindow(view->id);
-    if (!window) {
-        Buffer *buffer = BufferOpenFile(name);
-        if (IsNull(buffer)) Assert(0); // @todo
-        view = CreateView(buffer->id);
-        return view;
-    }
-
-    // Create new view, 2 view into same buffer at the same time
-    if (window->active_view.id == view->id.id) {
-        Buffer *buffer = BufferOpenFile(name);
-        if (IsNull(buffer)) Assert(0); // @todo
-        view = CreateView(buffer->id);
-        return view;
-    }
-
-    // Unlink and reuse
+void UnlinkView(Window *window, ViewID view) {
     For(window->views) {
-        if (it.id == view->id.id) {
+        if (it.id == view.id) {
             UnorderedRemove(&window->views, it);
             break;
         }
     }
+    Assert(window->active_view.id != view.id);
+}
+
+View *ViewOpenFile(Window *new_parent_window, String name) {
+    For(new_parent_window->views) {
+        View   *it_view   = GetView(it);
+        Buffer *it_buffer = GetBuffer(it_view->buffer_id);
+        if (it_buffer->name == name) {
+            new_parent_window->active_view = it;
+            return it_view;
+        }
+    }
+
+    View *view = FindViewWithBufferName(name);
+    if (!view) return _WindowOpenViewAndBuffer(new_parent_window, name);
+
+    Window *window = FindParentWindow(view->id);
+    if (!window) {
+        Add(&new_parent_window->views, view->id);
+        new_parent_window->active_view = view->id;
+        return view;
+    }
+
+    bool view_actively_used = window->active_view.id == view->id.id;
+    if (view_actively_used) return _WindowOpenViewAndBuffer(new_parent_window, name);
+
+    UnlinkView(window, view->id);
+    Add(&new_parent_window->views, view->id);
+    new_parent_window->active_view = view->id;
     return view;
 }

src/text_editor/text_editor.cpp

@@ -18,8 +18,8 @@
 #include "buffer_multi_cursor.cpp"
 #include "buffer_history.cpp"
 #include "buffer_test_load.cpp"
-#include "management.cpp"
 
+#include "management.cpp"
 #include "commands.cpp"
 #include "commands_clipboard.cpp"
 #include "commands_window.cpp"