From 2704ec407202477b4a87403cd40aa3e751f12831 Mon Sep 17 00:00:00 2001
From: Herman Semenoff <GermanAizek@yandex.ru>
Date: Sat, 18 Apr 2026 13:52:00 +0300
Subject: [PATCH] panel: decrease build time using C/C++ incomplete
 types/forward declaration

References:
- https://www.gnu.org/software/c-intro-and-ref/manual/html_node/Incomplete-Types.html
- https://stackoverflow.com/questions/73586567/how-does-forward-declaration-save-compile-time
- https://www.reddit.com/r/cpp/comments/84ewn5/forward_declarations_to_reduce_compiletime/
- https://arne-mertz.de/2018/03/forward-declarations/
---
 Panel.c |  8 +++++---
 Panel.h | 17 ++++++++---------
 2 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/Panel.c b/Panel.c
index f0c38af65..e066145dc 100644
--- a/Panel.c
+++ b/Panel.c
@@ -18,10 +18,12 @@ in the source distribution for its full text.
 #include <strings.h>
 
 #include "CRT.h"
+#include "FunctionBar.h"
 #include "ListItem.h"
 #include "Macros.h"
 #include "ProvideCurses.h"
 #include "RichString.h"
+#include "Vector.h"
 #include "XUtils.h"
 
 
@@ -33,7 +35,7 @@ const PanelClass Panel_class = {
    .eventHandler = Panel_selectByTyping,
 };
 
-Panel* Panel_new(int x, int y, int w, int h, const ObjectClass* type, bool owner, FunctionBar* fuBar) {
+Panel* Panel_new(int x, int y, int w, int h, const ObjectClass* type, bool owner, struct FunctionBar_* fuBar) {
    Panel* this;
    this = xMalloc(sizeof(Panel));
    Object_setClass(this, Class(Panel));
@@ -47,7 +49,7 @@ void Panel_delete(Object* cast) {
    free(this);
 }
 
-void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type, bool owner, FunctionBar* fuBar) {
+void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type, bool owner, struct FunctionBar_* fuBar) {
    this->x = x;
    this->y = y;
    this->w = w;
@@ -211,7 +213,7 @@ void Panel_setSelected(Panel* this, int selected) {
    }
 }
 
-void Panel_splice(Panel* this, Vector* from) {
+void Panel_splice(Panel* this, struct Vector_* from) {
    assert (this != NULL);
    assert (from != NULL);
 
diff --git a/Panel.h b/Panel.h
index e7620e08a..e565d8583 100644
--- a/Panel.h
+++ b/Panel.h
@@ -11,13 +11,12 @@ in the source distribution for its full text.
 #include <stdbool.h>
 
 #include "CRT.h"
-#include "FunctionBar.h"
 #include "Object.h"
 #include "RichString.h"
-#include "Vector.h"
 
+struct FunctionBar_;
+struct Vector_;
 
-struct Panel_;
 typedef struct Panel_ Panel;
 
 typedef enum HandlerResult_ {
@@ -64,7 +63,7 @@ struct Panel_ {
    Object super;
    int x, y, w, h;
    int cursorX, cursorY;
-   Vector* items;
+   struct Vector_* items;
    int selected;
    int oldSelected;
    size_t selectedLen;
@@ -74,8 +73,8 @@ struct Panel_ {
    bool needsRedraw;
    bool cursorOn;
    bool wasFocus;
-   FunctionBar* currentBar;
-   FunctionBar* defaultBar;
+   struct FunctionBar_* currentBar;
+   struct FunctionBar_* defaultBar;
    RichString header;
    ColorElements selectionColorId;
 };
@@ -86,11 +85,11 @@ struct Panel_ {
 
 extern const PanelClass Panel_class;
 
-Panel* Panel_new(int x, int y, int w, int h, const ObjectClass* type, bool owner, FunctionBar* fuBar);
+Panel* Panel_new(int x, int y, int w, int h, const ObjectClass* type, bool owner, struct FunctionBar_* fuBar);
 
 void Panel_delete(Object* cast);
 
-void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type, bool owner, FunctionBar* fuBar);
+void Panel_init(Panel* this, int x, int y, int w, int h, const ObjectClass* type, bool owner, struct FunctionBar_* fuBar);
 
 void Panel_done(Panel* this);
 
@@ -130,7 +129,7 @@ void Panel_setSelected(Panel* this, int selected);
 
 void Panel_draw(Panel* this, bool force_redraw, bool focus, bool highlightSelected, bool hideFunctionBar);
 
-void Panel_splice(Panel* this, Vector* from);
+void Panel_splice(Panel* this, struct Vector_* from);
 
 bool Panel_onKey(Panel* this, int key);