From fa83f224e2ec2541e45cf9ab2afc5a2b3b5f06cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=AB=8F=E8=A8=AA=E5=AD=90?= <suwako@076.moe>
Date: Sat, 17 Jan 2026 18:35:27 +0900
Subject: [PATCH] =?UTF-8?q?=E7=B6=BA=E9=BA=97=E3=81=AB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 main.c        | 112 +++++++++++++++++++++++-------------------------
 src/control.c | 115 +++++++++++++++++++++++++++-----------------------
 src/control.h |  13 +++---
 src/display.c |  18 ++++----
 src/display.h |   4 +-
 src/program.h |   3 --
 src/ui.h      |  16 +++++++
 src/utils.c   |  29 ++++++-------
 src/utils.h   |   5 +--
 9 files changed, 164 insertions(+), 151 deletions(-)

diff --git a/main.c b/main.c
index 456c304..6b4876f 100644
--- a/main.c
+++ b/main.c
@@ -4,73 +4,67 @@
 #include "src/utils.h"
 #include "src/control.h"
 
-XftColor color, btncolor;
-Colormap colormap;
-XftFont *font;
-XftFont *prbfont;
-XftFont *disfont;
-Visual *visual;
-
 const char *sofname = "ucalc";
 const char *version = "0.0.0";
 const char *disname = "Unix Calc";
 
 int main() {
-  Display *display;
-  Window window;
+  UiSystem ui;
   XEvent event;
   int screen;
-  GC gc = NULL;
   XGCValues values;
 
-  display = XOpenDisplay(NULL);
-  if (display == NULL) {
+  ui.display = XOpenDisplay(NULL);
+  if (ui.display == NULL) {
     fprintf(stderr, "画面を開けられません。\n");
     exit(1);
   }
 
-  screen = DefaultScreen(display);
+  screen = DefaultScreen(ui.display);
 
-  int sw = DisplayWidth(display, screen);
-  int sh = DisplayHeight(display, screen);
+  int sw = DisplayWidth(ui.display, screen);
+  int sh = DisplayHeight(ui.display, screen);
   int window_x = (sw - window_width) / 3;
   int window_y = (sh - window_height) / 2;
 
-  window = XCreateSimpleWindow(display, RootWindow(display, screen),
+  ui.window = XCreateSimpleWindow(ui.display,
+      RootWindow(ui.display, screen),
       window_x, window_y, window_width, window_height, 1, BTCOL, BGCOL);
-  if (!window) {
-    cleanup(display, window, gc, &color, &btncolor, font, disfont, prbfont, colormap, visual, backbuf);
+  if (!ui.window) {
+    cleanup(&ui);
     fprintf(stderr, "ウィンドウを作成に失敗。\n");
     exit(1);
   }
 
-  backbuf = XCreatePixmap(display, window, window_width, window_height, DefaultDepth(display, screen));
+  ui.backbuf = XCreatePixmap(ui.display, ui.window, window_width, window_height,
+      DefaultDepth(ui.display, screen));
+  ui.target = ui.backbuf;
 
-  Atom net_wm_window_type = XInternAtom(display, "_NET_WM_WINDOW_TYPE", False);
-  Atom dialog = XInternAtom(display, "_NET_WM_WINDOW_TYPE_DIALOG", False);
+  Atom net_wm_window_type = XInternAtom(ui.display, "_NET_WM_WINDOW_TYPE", False);
+  Atom dialog = XInternAtom(ui.display, "_NET_WM_WINDOW_TYPE_DIALOG", False);
 
-  XChangeProperty(display, window, net_wm_window_type, XA_ATOM, 32,
+  XChangeProperty(ui.display, ui.window, net_wm_window_type, XA_ATOM, 32,
       PropModeReplace, (unsigned char *)&dialog, 1);
 
-  XStoreName(display, window, disname);
-  Atom net_wm_name = XInternAtom(display, "_NET_WM_NAME", False);
+  XStoreName(ui.display, ui.window, disname);
+  Atom net_wm_name = XInternAtom(ui.display, "_NET_WM_NAME", False);
   char displayname[16];
   snprintf(displayname, 16, "%s %s", disname, version);
-  XChangeProperty(display, window, net_wm_name,
-      XInternAtom(display, "UTF8_STRING", False), 8,
+  XChangeProperty(ui.display, ui.window, net_wm_name,
+      XInternAtom(ui.display, "UTF8_STRING", False), 8,
       PropModeReplace, (unsigned char *)displayname, strlen(displayname));
 
   XClassHint *classHint = XAllocClassHint();
   if (classHint) {
     classHint->res_name = "unixcalc";
     classHint->res_class = "UnixCalc";
-    XSetClassHint(display, window, classHint);
+    XSetClassHint(ui.display, ui.window, classHint);
     XFree(classHint);
   }
 
-  XSetWindowBackground(display, window, BGCOL);
+  XSetWindowBackground(ui.display, ui.window, BGCOL);
 
-  XSelectInput(display, window,
+  XSelectInput(ui.display, ui.window,
       ExposureMask
     | ButtonPressMask
     | ButtonReleaseMask
@@ -80,84 +74,84 @@ int main() {
     // | StructureNotifyMask
   );
 
-  gc = XCreateGC(display, window, 0, &values);
-  if (!gc) {
-    cleanup(display, window, gc, &color, &btncolor, font, disfont, prbfont, colormap, visual, backbuf);
+  ui.gc = XCreateGC(ui.display, ui.window, 0, &values);
+  if (!ui.gc) {
+    cleanup(&ui);
     fprintf(stderr, "GCを作成に失敗。\n");
     exit(1);
   }
 
-  visual = DefaultVisual(display, screen);
+  ui.visual = *DefaultVisual(ui.display, screen);
 
-  colormap = XCreateColormap(display, window, visual, AllocNone);
-  if (colormap == None) {
-    cleanup(display, window, gc, &color, &btncolor, font, disfont, prbfont, colormap, visual, backbuf);
+  ui.colormap = XCreateColormap(ui.display, ui.window, &ui.visual, AllocNone);
+  if (ui.colormap == None) {
+    cleanup(&ui);
     fprintf(stderr, "カラーマップを作成に失敗。\n");
     exit(1);
   }
 
-  font = XftFontOpenName(display, screen, "Noto Sans CJK-12");
-  if (!font) {
-    cleanup(display, window, gc, &color, &btncolor, font, disfont, prbfont, colormap, visual, backbuf);
+  ui.font = XftFontOpenName(ui.display, screen, "Noto Sans CJK-12");
+  if (!ui.font) {
+    cleanup(&ui);
     fprintf(stderr, "フォントの読み込みに失敗。\n");
     exit(1);
   }
 
-  prbfont = XftFontOpenName(display, screen, "Noto Sans CJK-24");
-  if (!prbfont) {
-    cleanup(display, window, gc, &color, &btncolor, font, disfont, prbfont, colormap, visual, backbuf);
+  ui.prbfont = XftFontOpenName(ui.display, screen, "Noto Sans CJK-24");
+  if (!ui.prbfont) {
+    cleanup(&ui);
     fprintf(stderr, "問題フォントの読み込みに失敗。\n");
     exit(1);
   }
 
-  disfont = XftFontOpenName(display, screen, "Noto Sans CJK-72");
-  if (!disfont) {
-    cleanup(display, window, gc, &color, &btncolor, font, disfont, prbfont, colormap, visual, backbuf);
+  ui.disfont = XftFontOpenName(ui.display, screen, "Noto Sans CJK-72");
+  if (!ui.disfont) {
+    cleanup(&ui);
     fprintf(stderr, "解決フォントの読み込みに失敗。\n");
     exit(1);
   }
 
-  if (!XftColorAllocName(display, visual, colormap, "#232020", &color)) {
-    cleanup(display, window, gc, &color, &btncolor, font, disfont, prbfont, colormap, visual, backbuf);
+  if (!XftColorAllocName(ui.display, &ui.visual, ui.colormap, "#232020", &ui.color)) {
+    cleanup(&ui);
     fprintf(stderr, "色の役割に失敗。\n");
     exit(1);
   }
 
-  XMapWindow(display, window);
+  XMapWindow(ui.display, ui.window);
   {
     XWindowAttributes attr;
-    XGetWindowAttributes(display, window, &attr);
+    XGetWindowAttributes(ui.display, ui.window, &attr);
     XEvent fake = { .type = Expose };
-    fake.xexpose.window = window;
+    fake.xexpose.window = ui.window;
     fake.xexpose.width = attr.width;
     fake.xexpose.height = attr.height;
-    control_expose(display, window, gc, &event, &color, font, disfont, prbfont);
+    control_expose(&ui, &event);
   }
 
   while (isrunning) {
-    XNextEvent(display, &event);
+    XNextEvent(ui.display, &event);
 
     switch (event.type) {
       case Expose:
       case ConfigureNotify:
-        XClearWindow(display, window);
-        control_expose(display, window, gc, &event, &color, font, disfont, prbfont);
+        XClearWindow(ui.display, ui.window);
+        control_expose(&ui, &event);
         break;
       case ButtonPress:
         if (event.xbutton.button == Button1) {
-          handle_button_press(display, gc, event.xbutton.x, event.xbutton.y, &color, font);
+          handle_button_press(&ui, event.xbutton.x, event.xbutton.y);
           break;
         }
       case ButtonRelease:
         if (event.xbutton.button == Button1) {
-          handle_button_release(display, window, gc, event.xbutton.x, event.xbutton.y, &color, font, disfont, prbfont);
+          handle_button_release(&ui, event.xbutton.x, event.xbutton.y);
           break;
         }
       case KeyPress:
-        handle_key_press(display, window, gc, &event, &color, font, disfont, prbfont);
+        handle_key_press(&ui, &event);
         break;
       // case MotionNotify:
-      //   handle_mouse_hover(display, window, gc, &event, &color, font);
+      //   handle_mouse_hover(&ui, &event);
       //   break;
       case ClientMessage:
         // WM_DELETE_WINDOW
@@ -165,7 +159,7 @@ int main() {
     }
   }
 
-  cleanup(display, window, gc, &color, &btncolor, font, disfont, prbfont, colormap, visual, backbuf);
+  cleanup(&ui);
 
   return 0;
 }
diff --git a/src/control.c b/src/control.c
index dff9fef..9e93a25 100644
--- a/src/control.c
+++ b/src/control.c
@@ -120,78 +120,85 @@ double evaluate_simple(const char *expr) {
   return res;
 }
 
-void control_expose(Display *dpy, Window wnd, GC gc, XEvent *e, XftColor *color, XftFont *f, XftFont *df, XftFont *pf) {
-  (void)color;
+void control_expose(UiSystem *ui, XEvent *e) {
   if (e->type != Expose && e->type != ConfigureNotify) return;
 
   XWindowAttributes attr;
-  XGetWindowAttributes(dpy, wnd, &attr);
+  XGetWindowAttributes(ui->display, ui->window, &attr);
   int w = attr.width;
   int h = attr.height;
 
-  if (backbuf != None) {
-    XFreePixmap(dpy, backbuf);
+  if (ui->backbuf != None) {
+    XFreePixmap(ui->display, ui->backbuf);
+    ui->backbuf = None;
   }
 
-  backbuf = XCreatePixmap(dpy, wnd, w, h, DefaultDepth(dpy, DefaultScreen(dpy)));
+  ui->backbuf = XCreatePixmap(ui->display, ui->window, w, h,
+      DefaultDepth(ui->display, DefaultScreen(ui->display)));
 
-  if (backbuf == None) {
-    backbuf = wnd;
+  if (ui->backbuf == None) {
+    fprintf(stderr, "バックバッファ作成失敗！\n");
+    ui->backbuf = ui->window;
   }
 
-  XftDraw *backdraw = XftDrawCreate(dpy, backbuf,
-      DefaultVisual(dpy, DefaultScreen(dpy)), DefaultColormap(dpy, DefaultScreen(dpy)));
+  ui->target = ui->backbuf;
+
+  XftDraw *backdraw = XftDrawCreate(ui->display, ui->backbuf,
+      DefaultVisual(ui->display, DefaultScreen(ui->display)),
+        DefaultColormap(ui->display, DefaultScreen(ui->display)));
   if (!backdraw) {
     fprintf(stderr, "Pixmap向けXftDrawの作成に失敗。\n");
-    XFreePixmap(dpy, backbuf);
-    backbuf = None;
+    XFreePixmap(ui->display, ui->backbuf);
+    ui->backbuf = None;
     return;
   }
 
-  XSetForeground(dpy, gc, BGCOL);
-  XFillRectangle(dpy, backbuf, gc, 0, 0, w, h);
+  XSetForeground(ui->display, ui->gc, BGCOL);
+  XFillRectangle(ui->display, ui->backbuf, ui->gc, 0, 0, w, h);
 
   // 出力
-  if (displaytxt[0] != '\0' && df) {
+  if (displaytxt[0] != '\0' && ui->disfont) {
     const FcChar8 *text = (const FcChar8 *)displaytxt;
     int len = strlen((const char *)text);
 
     XGlyphInfo extents;
-    XftTextExtentsUtf8(dpy, df, text, len, &extents);
+    XftTextExtentsUtf8(ui->display, ui->disfont, text, len, &extents);
 
     int tx = w - 20 - extents.xOff;
     int ty = 160;
 
     XftColor discol;
-    XftColorAllocName(dpy, DefaultVisual(dpy, DefaultScreen(dpy)),
-                      DefaultColormap(dpy, DefaultScreen(dpy)),
+    XftColorAllocName(ui->display, DefaultVisual(ui->display, DefaultScreen(ui->display)),
+                      DefaultColormap(ui->display, DefaultScreen(ui->display)),
                       "#ee4030", &discol);
 
-    XftDrawStringUtf8(backdraw, &discol, df, tx, ty, text, len);
+    XftDrawStringUtf8(backdraw, &discol, ui->disfont, tx, ty, text, len);
 
-    XftColorFree(dpy, DefaultVisual(dpy, DefaultScreen(dpy)),
-                 DefaultColormap(dpy, DefaultScreen(dpy)), &discol);
+    XftColorFree(ui->display, DefaultVisual(ui->display, DefaultScreen(ui->display)),
+                 DefaultColormap(ui->display, DefaultScreen(ui->display)), &discol);
   }
 
-  if (displayprb[0] != '\0' && pf) {
+  if (displayprb[0] != '\0' && ui->prbfont) {
     const FcChar8 *text = (const FcChar8 *)displayprb;
     int len = strlen((const char *)text);
 
     XGlyphInfo extents;
-    XftTextExtentsUtf8(dpy, pf, text, len, &extents);
+    XftTextExtentsUtf8(ui->display, ui->prbfont, text, len, &extents);
 
     int tx = w - 20 - extents.xOff;
     int ty = 80;
 
     XftColor discol;
-    XftColorAllocName(dpy, DefaultVisual(dpy, DefaultScreen(dpy)),
-                      DefaultColormap(dpy, DefaultScreen(dpy)),
-                      "#b61729", &discol);
+    XftColorAllocName(ui->display,
+        DefaultVisual(ui->display, DefaultScreen(ui->display)),
+        DefaultColormap(ui->display, DefaultScreen(ui->display)),
+        "#b61729", &discol);
 
-    XftDrawStringUtf8(backdraw, &discol, pf, tx, ty, text, len);
+    XftDrawStringUtf8(backdraw, &discol, ui->prbfont, tx, ty, text, len);
 
-    XftColorFree(dpy, DefaultVisual(dpy, DefaultScreen(dpy)),
-                 DefaultColormap(dpy, DefaultScreen(dpy)), &discol);
+    XftColorFree(ui->display,
+        DefaultVisual(ui->display, DefaultScreen(ui->display)),
+        DefaultColormap(ui->display, DefaultScreen(ui->display)), &discol);
   }
 
   int width = 93;
@@ -219,50 +226,54 @@ void control_expose(Display *dpy, Window wnd, GC gc, XEvent *e, XftColor *color,
       btn.label = label;
       btn.pressed = 0;
 
-      drawbuttons(dpy, backbuf, gc, &btn, backdraw, color, f);
+      drawbuttons(ui, &btn, backdraw);
     }
   }
 
-  XCopyArea(dpy, backbuf, wnd, gc, 0, 0, w, h, 0, 0);
+  XCopyArea(ui->display, ui->backbuf, ui->window, ui->gc, 0, 0, w, h, 0, 0);
   XftDrawDestroy(backdraw);
-  XFlush(dpy);
+  XFlush(ui->display);
 }
 
-void handle_button_press(Display *dpy, GC gc, int mx, int my, XftColor *col, XftFont *f) {
+void handle_button_press(UiSystem *ui, int mx, int my) {
   SuwaButton *btn = find_button_at(mx, my);
   if (!btn) return;
 
   btn->pressed = 1;
-  XftDraw *backdraw = XftDrawCreate(dpy, backbuf,
-      DefaultVisual(dpy, DefaultScreen(dpy)), DefaultColormap(dpy, DefaultScreen(dpy)));
+  XftDraw *backdraw = XftDrawCreate(ui->display, ui->backbuf,
+      DefaultVisual(ui->display, DefaultScreen(ui->display)),
+        DefaultColormap(ui->display, DefaultScreen(ui->display)));
   if (!backdraw) {
     fprintf(stderr, "Pixmap向けXftDrawの作成に失敗。\n");
-    XFreePixmap(dpy, backbuf);
-    backbuf = None;
+    XFreePixmap(ui->display, ui->backbuf);
+    ui->backbuf = None;
     return;
   }
 
-  drawbuttons(dpy, backbuf, gc, btn, backdraw, col, f);
-  XFlush(dpy);
+  drawbuttons(ui, btn, backdraw);
+  XFlush(ui->display);
 }
 
-void handle_button_release(Display *dpy, Window wnd, GC gc, int mx, int my, XftColor *col, XftFont *f, XftFont *df, XftFont *pf) {
+void handle_button_release(UiSystem *ui, int mx, int my) {
   SuwaButton *btn = find_button_at(mx, my);
   if (!btn) return;
 
   btn->pressed = 0;
 
-  XftDraw *backdraw = XftDrawCreate(dpy, backbuf,
-      DefaultVisual(dpy, DefaultScreen(dpy)), DefaultColormap(dpy, DefaultScreen(dpy)));
+  XftDraw *backdraw = XftDrawCreate(ui->display, ui->backbuf,
+      DefaultVisual(ui->display, DefaultScreen(ui->display)),
+        DefaultColormap(ui->display, DefaultScreen(ui->display)));
   if (!backdraw) {
     fprintf(stderr, "Pixmap向けXftDrawの作成に失敗。\n");
-    XFreePixmap(dpy, backbuf);
-    backbuf = None;
+    XFreePixmap(ui->display, ui->backbuf);
+    ui->backbuf = None;
     return;
   }
-  drawbuttons(dpy, backbuf, gc, btn, backdraw, col, f);
+
+  ui->target = ui->backbuf;
+  drawbuttons(ui, btn, backdraw);
   XftDrawDestroy(backdraw);
-  XFlush(dpy);
+  XFlush(ui->display);
 
   const char *label = btn->label;
   if (strcmp(label, "C") == 0) {
@@ -283,10 +294,10 @@ void handle_button_release(Display *dpy, Window wnd, GC gc, int mx, int my, XftC
     append_to_input(label[0]);
   }
 
-  control_expose(dpy, wnd, gc, &(XEvent){.type = Expose}, col, f, df, pf);
+  control_expose(ui, &(XEvent){.type = Expose});
 }
 
-void handle_key_press(Display *dpy, Window wnd, GC gc, XEvent *event, XftColor *col, XftFont *f, XftFont *df, XftFont *pf) {
+void handle_key_press(UiSystem *ui, XEvent *event) {
   KeySym keysym;
   char buf[32];
   int len;
@@ -369,21 +380,21 @@ void handle_key_press(Display *dpy, Window wnd, GC gc, XEvent *event, XftColor *
   return;
 
 redraw:
-  control_expose(dpy, wnd, gc, &(XEvent){.type = Expose}, col, f, df, pf);
+  control_expose(ui, &(XEvent){.type = Expose});
 }
 
-// void handle_mouse_hover(Display *dpy, Window wnd, GC gc, XEvent *event, XftColor *col, XftFont *f) {
+// void handle_mouse_hover(UiSystem *ui, XEvent *event) {
 //   SuwaButton *hover = find_button_at(event->xmotion.x, event->xmotion.y);
 
 //   if (hover != hovered_btn) {
 //     if (hovered_btn) {
 //       hovered_btn->pressed = 0;
-//       redraw_single_button(dpy, wnd, gc, col, f, hovered_btn);
+//       redraw_single_button(&ui, hovered_btn);
 //     }
 //     hovered_btn = hover;
 
 //     if (hovered_btn) {
-//       redraw_single_button(dpy, wnd, gc, col, f, hovered_btn);
+//       redraw_single_button(&ui, hovered_btn);
 //     }
 //   }
 // }
diff --git a/src/control.h b/src/control.h
index e313856..c8d430a 100644
--- a/src/control.h
+++ b/src/control.h
@@ -1,10 +1,9 @@
 #pragma once
 
-#include <X11/Xlib.h>
-#include <X11/Xft/Xft.h>
+#include "ui.h"
 
-void control_expose(Display *dpy, Window wnd, GC gc, XEvent *event, XftColor *color, XftFont *f, XftFont *df, XftFont *pf);
-void handle_button_press(Display *dpy, GC gc, int mx, int my, XftColor *col, XftFont *f);
-void handle_button_release(Display *dpy, Window wnd, GC gc, int mx, int my, XftColor *col, XftFont *f, XftFont *df, XftFont *pf);
-void handle_key_press(Display *dpy, Window wnd, GC gc, XEvent *event, XftColor *col, XftFont *f, XftFont *df, XftFont *pf);
-void handle_mouse_hover(Display *dpy, Window wnd, GC gc, XEvent *event, XftColor *col, XftFont *f);
+void control_expose(UiSystem *ui, XEvent *event);
+void handle_button_press(UiSystem *ui, int mx, int my);
+void handle_button_release(UiSystem *ui, int mx, int my);
+void handle_key_press(UiSystem *ui, XEvent *event);
+void handle_mouse_hover(UiSystem *ui, XEvent *event);
diff --git a/src/display.c b/src/display.c
index 0080708..d6ae93d 100644
--- a/src/display.c
+++ b/src/display.c
@@ -3,28 +3,28 @@
 
 #include <string.h>
 
-void drawbuttons(Display *dpy, Drawable target, GC gc, SuwaButton *btn,
-    XftDraw *xftdraw, XftColor *textcolor, XftFont *font) {
+void drawbuttons(UiSystem *ui, SuwaButton *btn, XftDraw *xftdraw) {
   unsigned long curbg = btn->pressed ? BTSEL : BTCOL;
-  XSetForeground(dpy, gc, curbg);
-  XFillRectangle(dpy, target, gc, btn->x, btn->y, btn->width, btn->height);
+  XSetForeground(ui->display, ui->gc, curbg);
+  XFillRectangle(ui->display, ui->target, ui->gc, btn->x, btn->y, btn->width, btn->height);
 
   // 文字の中央に
-  if (btn->label && font && xftdraw) {
+  if (btn->label && ui->font && xftdraw) {
     const FcChar8 *str = (const FcChar8 *)btn->label;
     int len = strlen((const char *)str);
 
     XGlyphInfo extents;
-    XftTextExtentsUtf8(dpy, font, str, len, &extents);
+    XftTextExtentsUtf8(ui->display, ui->font, str, len, &extents);
 
     int text_w = extents.xOff;
-    int text_h = font->ascent + font->descent;
+    int text_h = ui->font->ascent + ui->font->descent;
 
     int tx = btn->x + (btn->width - text_w) / 2;
-    int ty = btn->y + (btn->height - text_h) / 2 + font->ascent;
+    int ty = btn->y + (btn->height - text_h) / 2 + ui->font->ascent;
 
     // tx -= extents.x;
 
-    XftDrawStringUtf8(xftdraw, textcolor, font, tx, ty, (FcChar8 *)btn->label, len);
+    XftDrawStringUtf8(xftdraw, &ui->textcolor, ui->font, tx, ty,
+        (FcChar8 *)btn->label, len);
   }
 }
diff --git a/src/display.h b/src/display.h
index f164249..c67db60 100644
--- a/src/display.h
+++ b/src/display.h
@@ -1,6 +1,6 @@
 #pragma once
 
 #include "program.h"
+#include "ui.h"
 
-void drawbuttons(Display *dpy, Drawable target, GC gc, SuwaButton *btn,
-    XftDraw *xftdraw, XftColor *textcolor, XftFont *font);
+void drawbuttons(UiSystem *ui, SuwaButton *btn, XftDraw *xftdraw);
diff --git a/src/program.h b/src/program.h
index 67b0dc2..9b6cf45 100644
--- a/src/program.h
+++ b/src/program.h
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <X11/Xlib.h>
-#include <X11/Xft/Xft.h>
 #include "ui.h"
 
 #define FGCOL 0xfcfcfc
@@ -17,6 +15,5 @@ extern char displayprb[128];
 extern char curinput[256];
 extern char displaytxt[64];
 extern int input_pos;
-extern Pixmap backbuf;
 extern SuwaButton *hovered_btn;
 extern SuwaButton *pressed_btn;
diff --git a/src/ui.h b/src/ui.h
index 7a3236f..66cb489 100644
--- a/src/ui.h
+++ b/src/ui.h
@@ -1,5 +1,21 @@
 #pragma once
 
+#include <X11/Xlib.h>
+#include <X11/Xft/Xft.h>
+
+typedef struct {
+  Display *display;
+  Window window;
+  Drawable target;
+  GC gc;
+  Visual visual;
+  XftDraw *xftdraw;
+  XftColor color, btncolor, textcolor;
+  XftFont *font, *prbfont, *disfont;
+  Colormap colormap;
+  Pixmap backbuf;
+} UiSystem;
+
 typedef struct {
   int x, y, width, height;
   const char *label;
diff --git a/src/utils.c b/src/utils.c
index db9a542..7c2bb44 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -1,19 +1,18 @@
 #include "utils.h"
 
-void cleanup(Display *display, Window window, GC gc,
-    XftColor *color, XftColor *btncolor, XftFont *font,
-    XftFont *disfont, XftFont *prbfont, Colormap colormap, Visual *visual,
-    Pixmap backbuf) {
-  if (btncolor) XftColorFree(display, visual, colormap, btncolor);
-  if (color) XftColorFree(display, visual, colormap, color);
-  if (disfont) XftFontClose(display, disfont);
-  if (prbfont) XftFontClose(display, prbfont);
-  if (font) XftFontClose(display, font);
-  if (gc) XFreeGC(display, gc);
-  if (backbuf) {
-    XFreePixmap(display, backbuf);
-    backbuf = None;
+void cleanup(UiSystem *ui) {
+  if (ui->btncolor.pixel != 0)
+    XftColorFree(ui->display, &ui->visual, ui->colormap, &ui->btncolor);
+  if (ui->color.pixel != 0)
+    XftColorFree(ui->display, &ui->visual, ui->colormap, &ui->color);
+  if (ui->disfont) XftFontClose(ui->display, ui->disfont);
+  if (ui->prbfont) XftFontClose(ui->display, ui->prbfont);
+  if (ui->font) XftFontClose(ui->display, ui->font);
+  if (ui->gc) XFreeGC(ui->display, ui->gc);
+  if (ui->backbuf) {
+    XFreePixmap(ui->display, ui->backbuf);
+    ui->backbuf = None;
   }
-  if (window) XDestroyWindow(display, window);
-  if (display) XCloseDisplay(display);
+  if (ui->window) XDestroyWindow(ui->display, ui->window);
+  if (ui->display) XCloseDisplay(ui->display);
 }
diff --git a/src/utils.h b/src/utils.h
index fdf356f..b97648f 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -2,7 +2,4 @@
 
 #include "program.h"
 
-void cleanup(Display *display, Window window, GC gc,
-    XftColor *color, XftColor *btncolor, XftFont *font,
-    XftFont *disfont, XftFont *prbfont, Colormap colormap, Visual *visual,
-    Pixmap backbuf);
+void cleanup(UiSystem *ui);