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// MIT License, Copyright (c) 2020 Marvin Borner
// Mostly GFX function wrappers
#include <def.h>
#include <gfx.h>
#include <gui.h>
#include <list.h>
#include <mem.h>
#include <print.h>
#include <str.h>
#include <sys.h>
// TODO: Use list (and add index-based access)
#define MAX_WINDOWS 10
u32 window_count = 0;
static struct window windows[MAX_WINDOWS] = { 0 };
static struct window *new_window(const char *title, int x, int y, u32 width, u32 height, int flags)
{
if (window_count + 1 >= MAX_WINDOWS)
return NULL;
struct window *win = &windows[window_count + 1];
win->ctx = malloc(sizeof(*win->ctx));
win->ctx->x = x > 0 ? x : 50;
win->ctx->y = y > 0 ? y : 50;
win->ctx->width = width > 0 ? width : 600;
win->ctx->height = height > 0 ? height : 400;
win->ctx->flags = flags;
win->id = window_count + 1;
win->title = title;
win->childs = list_new();
gfx_new_ctx(win->ctx);
if (!win->ctx->fb)
return NULL;
window_count++;
return win;
}
static struct element *get_root(u32 window_id)
{
struct list *childs = windows[window_id].childs;
if (!childs || !childs->head || !childs->head->data)
return NULL;
return childs->head->data;
}
static void merge_elements(struct element *container)
{
if (!container || !container->childs || !container->childs->head)
return;
struct node *iterator = container->childs->head;
while (iterator != NULL) {
struct element *elem = iterator->data;
struct context *ctx = elem->ctx;
merge_elements(elem);
gfx_ctx_on_ctx(container->ctx, ctx, ctx->x, ctx->y);
iterator = iterator->next;
}
}
static struct element *element_at(struct element *container, int x, int y)
{
if (!container || !container->childs || !container->childs->head)
return NULL;
struct node *iterator = container->childs->head;
while (iterator != NULL) {
struct context *ctx = ((struct element *)iterator->data)->ctx;
int relative_x, relative_y;
if (container->type == GUI_TYPE_ROOT) {
relative_x = ctx->x;
relative_y = ctx->y;
} else {
relative_x = ctx->x + container->ctx->x;
relative_y = ctx->y + container->ctx->y;
}
if (ctx != container->ctx && ctx->flags & WF_RELATIVE && x >= relative_x &&
x <= relative_x + (int)ctx->width && y >= relative_y &&
y <= relative_y + (int)ctx->height) {
struct element *recursive = NULL;
if ((recursive = element_at(iterator->data, x, y)))
return recursive;
else
return iterator->data;
}
iterator = iterator->next;
}
return NULL;
}
void gui_sync_button(struct element *elem)
{
struct element_button *button = elem->data;
gfx_fill(elem->ctx, button->color_bg);
gfx_write(elem->ctx, 0, 0, button->font_type, button->color_fg, button->text);
}
void gui_sync_container(struct element *elem)
{
struct element_container *container = elem->data;
gfx_fill(elem->ctx, container->color_bg);
// TODO: Handle container flags
}
struct element *gui_add_button(struct element *container, int x, int y, enum font_type font_type,
char *text, u32 color_bg, u32 color_fg)
{
if (!container || !container->childs)
return NULL;
gfx_resolve_font(font_type);
struct element *button = malloc(sizeof(*button));
button->type = GUI_TYPE_BUTTON;
button->window_id = container->window_id;
button->ctx = malloc(sizeof(*button->ctx));
button->ctx->x = x;
button->ctx->y = y;
button->ctx->width = strlen(text) * gfx_font_width(font_type);
button->ctx->height = gfx_font_height(font_type);
button->ctx->flags = WF_RELATIVE;
button->childs = list_new();
button->data = malloc(sizeof(struct element_button));
((struct element_button *)button->data)->text = text;
((struct element_button *)button->data)->color_fg = color_fg;
((struct element_button *)button->data)->color_bg = color_bg;
((struct element_button *)button->data)->font_type = font_type;
gfx_new_ctx(button->ctx);
list_add(container->childs, button);
gui_sync_button(button);
merge_elements(get_root(container->window_id));
return button;
}
struct element *gui_add_container(struct element *container, int x, int y, u32 width, u32 height,
u32 color_bg)
{
if (!container || !container->childs)
return NULL;
struct element *new_container = malloc(sizeof(*new_container));
new_container->type = GUI_TYPE_CONTAINER;
new_container->window_id = container->window_id;
new_container->ctx = malloc(sizeof(*new_container->ctx));
new_container->ctx->x = x;
new_container->ctx->y = y;
new_container->ctx->width = width;
new_container->ctx->height = height;
new_container->ctx->flags = WF_RELATIVE;
new_container->childs = list_new();
new_container->data = malloc(sizeof(struct element_container));
((struct element_container *)new_container->data)->color_bg = color_bg;
((struct element_container *)new_container->data)->flags = 0;
gfx_new_ctx(new_container->ctx);
list_add(container->childs, new_container);
gui_sync_container(new_container);
merge_elements(get_root(container->window_id));
return new_container;
}
void gui_event_loop(struct element *container)
{
if (!container)
return;
struct message *msg;
while (1) {
if (!(msg = msg_receive())) {
yield();
continue;
}
switch (msg->type) {
case GUI_MOUSE: {
struct gui_event_mouse *event = msg->data;
struct element *elem = element_at(container, event->x, event->y);
if (!elem)
continue;
if (elem->type == GUI_TYPE_BUTTON) {
struct element_button *button = elem->data;
if (event->but1 && button->on_click)
button->on_click();
}
}
}
}
}
struct element *gui_init(const char *title, u32 width, u32 height)
{
if (window_count != 0)
return NULL;
// TODO: Add center flag
struct window *win = new_window(title, 30, 30, width, height, WF_DEFAULT);
if (!win)
return NULL;
gfx_fill(win->ctx, COLOR_BG);
struct element *container = malloc(sizeof(*container));
container->type = GUI_TYPE_ROOT;
container->window_id = win->id;
container->ctx = win->ctx;
container->childs = list_new();
container->data = NULL;
list_add(win->childs, container);
return container;
}
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