From f5faf5ae8c4f36a8e8845ba2f5b93fc53be07eda Mon Sep 17 00:00:00 2001
From: Artsiom Dzenisiuk <artsiom.d@icloud.com>
Date: Sat, 18 Oct 2025 18:18:29 +0200
Subject: [PATCH] I decided that using 4 SPACES is better than mixing with
 tabs.

---
 box.c  | 237 +++++++++++++++++++++++++++++----------------------------
 box.h  |  27 +++----
 main.c |  66 ++++++++--------
 ui.c   |  29 +++----
 4 files changed, 182 insertions(+), 177 deletions(-)

diff --git a/box.c b/box.c
index 893da97..3d17b10 100644
--- a/box.c
+++ b/box.c
@@ -23,199 +23,206 @@ static void draw_container(struct box *, double x, double y, double width, doubl
 static void draw_button(struct box *, double x, double y, double width, double height);
 
 
+void
+append_box(struct box *parent, struct box *child)
+{
+    parent->children[parent->length++] = child;
+}
+
+
 static void
 draw_rectangle(double fx, double fy, double fwidth, double fheight)
 {
-	size_t x = llround(fx);
-	size_t y = llround(fy);
-	size_t w = llround(fwidth) - 1;
-	size_t h = llround(fheight) - 1;
+    size_t x = llround(fx);
+    size_t y = llround(fy);
+    size_t w = llround(fwidth) - 1;
+    size_t h = llround(fheight) - 1;
 
-	/* corners */
+    /* corners */
 
-	ui_char(x, y, '+');
-	ui_char(x, y + h, '+');
-	ui_char(x + w, y + h, '+');
-	ui_char(x + w, y, '+');
+    ui_char(x, y, '+');
+    ui_char(x, y + h, '+');
+    ui_char(x + w, y + h, '+');
+    ui_char(x + w, y, '+');
 
-	/* vertical borders */
+    /* vertical borders */
 
-	for (size_t i = 1; i < h; i++) {
-		ui_char(x, y + i, '|');
-	}
+    for (size_t i = 1; i < h; i++) {
+        ui_char(x, y + i, '|');
+    }
 
-	for (size_t i = 1; i < h; i++) {
-		ui_char(x + w, y + i, '|');
-	}
+    for (size_t i = 1; i < h; i++) {
+    ui_char(x + w, y + i, '|');
+    }
 
-	/* horizontal borders */
+    /* horizontal borders */
 
-	for (size_t i = 1; i < w; i++) {
-		ui_char(x + i, y, '-');
-	}
+    for (size_t i = 1; i < w; i++) {
+    ui_char(x + i, y, '-');
+    }
 
-	for (size_t i = 1; i < w; i++) {
-		ui_char(x + i, y + h, '-');
-	}
-}	
+    for (size_t i = 1; i < w; i++) {
+    ui_char(x + i, y + h, '-');
+    }
+}    
 
 
 static void
 draw_chart(struct box *chart, double x, double y, double width, double height)
 {
-	char c = '@';
-	long int actual_diff;
-	double diff, price;
-	enum ui_color color;
+    char c = '@';
+    long int actual_diff;
+    double diff, price;
+    enum ui_color color;
 
-	draw_rectangle(x, y, width, height);
+    draw_rectangle(x, y, width, height);
 
-	x += 1;
-	y += 1;
-	width -= 2;
-	height -= 2;
-	
-	price = height / 2;
-	actual_diff = 0;
+    x += 1;
+    y += 1;
+    width -= 2;
+    height -= 2;
+    
+    price = height / 2;
+    actual_diff = 0;
 
-	for (size_t i = 0; i < width; i++) {
-		diff = (double)rand() / RAND_MAX - 0.6;
-		actual_diff =  (size_t)(height + y - price) - (size_t)(height + y - (price + diff));
+    for (size_t i = 0; i < width; i++) {
+    diff = (double)rand() / RAND_MAX - 0.6;
+    actual_diff =  (size_t)(height + y - price) - (size_t)(height + y - (price + diff));
 
-		if (actual_diff > 0)  {
-			color = UI_GREEN;
-		} else if (actual_diff == 0) {
-			color = UI_NONE;
-		} else if (actual_diff < 0) {
-			color = UI_RED;
-		}
+    if (actual_diff > 0)  {
+    color = UI_GREEN;
+    } else if (actual_diff == 0) {
+    color = UI_NONE;
+    } else if (actual_diff < 0) {
+    color = UI_RED;
+    }
 
-		ui_color_on(color);
-		ui_char(x + i, height + y - price, c);
-		ui_color_off(color);
+    ui_color_on(color);
+    ui_char(x + i, height + y - price, c);
+    ui_color_off(color);
 
-		price += diff;
-	}
+    price += diff;
+    }
 }
 
 
 static void
 draw_button(struct box *b, double x, double y, double width, double height)
 {
-	ui_color_on(b->color);
-	draw_rectangle(x, y, width, height);
-	ui_string(x + width / 2 - strlen(b->name) / 2, y + height / 2, b->name);
-	ui_color_off(b->color);
+    ui_color_on(b->color);
+    draw_rectangle(x, y, width, height);
+    ui_string(x + width / 2 - strlen(b->name) / 2, y + height / 2, b->name);
+    ui_color_off(b->color);
 }
 
 
 static void
 draw_container(struct box *b, double x, double y, double width, double height)
 {
-	double       current, length, total_fills, pixels_per_fill;
-	struct box  *child;
+    double       current, length, total_fills, pixels_per_fill;
+    struct box  *child;
 
-	switch (b->type) {
-	case BOX_VERTICAL:
-		length = height;
-		current = y;
-		break;
-	case BOX_HORIZONTAL:
-		length = width;
-		current = x;
-		break;
-	}
-	
-	total_fills = 0;
-	for (size_t i = 0; i < b->length; i++) {
-		total_fills += b->children[i]->fills;
-	}
+    switch (b->type) {
+    case BOX_VERTICAL:
+    length = height;
+    current = y;
+    break;
+    case BOX_HORIZONTAL:
+    length = width;
+    current = x;
+    break;
+    }
+    
+    total_fills = 0;
+    for (size_t i = 0; i < b->length; i++) {
+    total_fills += b->children[i]->fills;
+    }
 
-	pixels_per_fill = length / total_fills;
+    pixels_per_fill = length / total_fills;
 
-	for (size_t i = 0; i < b->length; i++) {
-		child = b->children[i];
-		length = child->fills * pixels_per_fill;
+    for (size_t i = 0; i < b->length; i++) {
+    child = b->children[i];
+    length = child->fills * pixels_per_fill;
 
-		switch (b->type) {
-		case BOX_VERTICAL:   draw_box(child, x, current, width, length);  break;
-		case BOX_HORIZONTAL: draw_box(child, current, y, length, height); break;
-		}
+    switch (b->type) {
+    case BOX_VERTICAL:   draw_box(child, x, current, width, length);  break;
+    case BOX_HORIZONTAL: draw_box(child, current, y, length, height); break;
+    }
 
-		current += length;
-	}
+    current += length;
+    }
 }
 
 
 struct box *
 new_chart_box(void)
 {
-	struct box *chart = malloc(sizeof(struct box));
+    struct box *chart = malloc(sizeof(struct box));
 
-	chart->type = BOX_CHART;
-	chart->prices = emalloc(sizeof(double) * 100);
-	chart->fills = 1;
-	chart->color = UI_NONE;
+    chart->type = BOX_CHART;
+    chart->prices = emalloc(sizeof(double) * 100);
+    chart->fills = 1;
+    chart->color = UI_NONE;
 
-	return chart;
+    return chart;
 }
 
 
 struct box *
 new_button_box(char *name)
 {
-	struct box *button = malloc(sizeof(struct box));
+    struct box *button = malloc(sizeof(struct box));
 
-	button->type = BOX_BUTTON;
-	button->name = name;
-	button->fills = 1;
-	button->color = UI_NONE;
+    button->type = BOX_BUTTON;
+    button->name = name;
+    button->fills = 1;
+    button->color = UI_NONE;
 
-	return button;
+    return button;
 }
 
 
 struct box *
 new_container_box(enum box_type type)
 {
-	struct box *box = emalloc(sizeof(struct box));
+    struct box *box = emalloc(sizeof(struct box));
 
-	box->type = type;
-	box->fills = 1;
-	box->color = UI_NONE;
-	box->children = emalloc(sizeof(struct box *) * 100);
-	box->length = 0;
+    box->type = type;
+    box->fills = 1;
+    box->color = UI_NONE;
+    box->children = emalloc(sizeof(struct box *) * 100);
+    box->length = 0;
 
-	return box;
+    return box;
 }
 
 struct box *
 new_horizontal_box(void)
 {
-	return new_container_box(BOX_HORIZONTAL);
+    return new_container_box(BOX_HORIZONTAL);
 }
 
 
 struct box *
 new_vertical_box(void)
 {
-	return new_container_box(BOX_VERTICAL);
+    return new_container_box(BOX_VERTICAL);
 }
 
 
 void
 draw_box(struct box *b, double x, double y, double width, double height)
 {
-	switch (b->type) {
-	case BOX_BUTTON:
-		draw_button(b, x, y, width, height);
-		break;
-	case BOX_CHART:
-		draw_chart(b, x, y, width, height);
-		break;
-	case BOX_HORIZONTAL:
-	case BOX_VERTICAL:
-		draw_container(b, x, y, width, height);
-		break;
-	}
+    switch (b->type) {
+    case BOX_BUTTON:
+        draw_button(b, x, y, width, height);
+        break;
+    case BOX_CHART:
+        draw_chart(b, x, y, width, height);
+        break;
+    case BOX_HORIZONTAL:
+    case BOX_VERTICAL:
+        draw_container(b, x, y, width, height);
+        break;
+    }
 }
diff --git a/box.h b/box.h
index 22f33c4..a0495c4 100644
--- a/box.h
+++ b/box.h
@@ -24,22 +24,22 @@ struct box {
     double fills;
 
     union {
-    	/* button */
-	    char *name;
+        /* button */
+        char *name;
 
-    	/* chart and vertical/horizontal box */
-    	struct {
-    	    /* chart and vertical/horizontal box */
-    	    size_t length;
+        /* chart and vertical/horizontal box */
+        struct {
+            /* chart and vertical/horizontal box */
+            size_t length;
 
-    	    union {
-        	    /* vertical/horizontal box */
-        	    struct box **children;
+            union {
+                /* vertical/horizontal box */
+                struct box **children;
 
-            	/* chart */
-        	    double *prices;
-        	};
-    	};
+                /* chart */
+                double *prices;
+            };
+        };
     };
 };
 
@@ -49,5 +49,6 @@ struct box *new_vertical_box(void);
 struct box *new_horizontal_box(void);
 struct box *new_chart_box(void);
 
+void append_box(struct box *parent, struct box *child);
 
 void draw_box(struct box *, double x, double y, double width, double height);
diff --git a/main.c b/main.c
index f92e837..d299ba1 100644
--- a/main.c
+++ b/main.c
@@ -16,50 +16,46 @@
 int
 main(void)
 {
-	struct box *ui, *top, *bottom, *left, *right, *buy, *sell, *scam, *title, *desc;
+    struct box *ui, *top, *bottom, *left, *right, *buy, *sell, *scam, *title, *desc;
 
-	ui_init();
+    ui_init();
 
-	title = new_button_box("Bitcoin");
-	desc = new_button_box("A crypto-scam :-)");
+    title = new_button_box("Bitcoin");
+    desc = new_button_box("A crypto-scam :-)");
 
-	top = new_vertical_box();
-	top->length = 2;
-	top->children[0] = title;
-	top->children[1] = desc;
+    top = new_vertical_box();
+    append_box(top, title);
+    append_box(top, desc);
 
-	left = new_chart_box();
-	left->fills = 5;
+    left = new_chart_box();
+    left->fills = 5;
 
-	buy = new_button_box("buy");
-	buy->color = UI_GREEN;
-	sell = new_button_box("sell");
-	sell->color = UI_RED;
-	scam = new_button_box("scam");
-	sell->color = UI_BLUE;
+    buy = new_button_box("buy");
+    buy->color = UI_GREEN;
+    sell = new_button_box("sell");
+    sell->color = UI_RED;
+    scam = new_button_box("scam");
+    sell->color = UI_BLUE;
 
-	right = new_vertical_box();
-	right->length = 3;
-	right->children[0] = buy;
-	right->children[1] = sell;
-	right->children[2] = scam;
+    right = new_vertical_box();
+    append_box(right, buy);
+    append_box(right, sell);
+    append_box(right, scam);
 
-	bottom = new_horizontal_box();
-	bottom->fills = 3;
-	bottom->length = 2;
-	bottom->children[0] = left;
-	bottom->children[1] = right;
+    bottom = new_horizontal_box();
+    bottom->fills = 3;
+    append_box(bottom, left);
+    append_box(bottom, right);
 
-	ui = new_vertical_box();
-	ui->length = 2;
-	ui->children[0] = top;
-	ui->children[1] = bottom;
+    ui = new_vertical_box();
+    append_box(ui, top);
+    append_box(ui, bottom);
 
-	draw_box(ui, 0, 0, ui_width(), 40);
+    draw_box(ui, 0, 0, ui_width()-1, ui_height()-1);
 
-	ui_refresh();
-	
-	sleep(300);
+    ui_refresh();
+    
+    sleep(300);
 
-	ui_end();
+    ui_end();
 }
diff --git a/ui.c b/ui.c
index eaa4de4..bd556b2 100644
--- a/ui.c
+++ b/ui.c
@@ -11,26 +11,27 @@
 #include "ui.h"
 
 
-void ui_init(void)
+void
+ui_init(void)
 {
     srand(time(NULL));
-	initscr();
-	start_color();
-	init_pair(UI_GREEN, COLOR_GREEN, COLOR_BLACK);
-	init_pair(UI_RED,   COLOR_RED,   COLOR_BLACK);
-	init_pair(UI_BLUE,  COLOR_BLUE,  COLOR_BLACK);
-	cbreak();
-	noecho();
-	nonl();
-	intrflush(stdscr, FALSE);
-	keypad(stdscr, TRUE);
-	clear();
-	refresh();
+    initscr();
+    start_color();
+    init_pair(UI_GREEN, COLOR_GREEN, COLOR_BLACK);
+    init_pair(UI_RED,   COLOR_RED,   COLOR_BLACK);
+    init_pair(UI_BLUE,  COLOR_BLUE,  COLOR_BLACK);
+    cbreak();
+    noecho();
+    nonl();
+    intrflush(stdscr, FALSE);
+    keypad(stdscr, TRUE);
+    clear();
+    refresh();
 }
 
 void ui_end()
 {
-	endwin();
+    endwin();
 }
 
 void ui_string(size_t x, size_t y, char *s)