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/*
* Copyright (C) 2025 dwlr <dweller@cabin.digital>
*
* BSD 3-Clause License (BSD-3-Clause)
* See LICENSE for details
*/
#define IUI_TXT_CENTER bit(0)
#define IUI_CLIP_CLEAR bit(0)
typedef struct
{
enum
{
IUI_ILL,
IUI_BOX,
IUI_FILL,
IUI_LINE,
IUI_TEXT,
IUI_CLIP,
} type;
u32 color;
u16 x, y, w, h;
u16 size;
u16 flags;
char* text;
} iui_cmd;
#define IUI_CMDBUF_LEN 512
typedef struct
{
arena* ar;
void* usr;
usize hot;
usize active;
usize kbdfocus;
/* mouse */
u16 x;
u16 y;
u8 pbtns;
u8 btns;
/* TODO: event pump */
usize ncmds;
iui_cmd cmds[IUI_CMDBUF_LEN]; /* TODO: arena? */
} iui;
void iui_init(iui* ui, arena* ar, void* usr)
{
if(!ui)
{
report(WARN, "iui: iui_init() ui == NULL!\n");
return;
}
ui->ar = ar;
ui->usr = usr;
}
void iui_start(iui* ui)
{
assert(ui);
ui->hot = 0;
ar_clear(ui->ar);
}
void iui_end(iui* ui)
{
assert(ui);
if(!ui->btns) ui->active = 0;
else if(!ui->active) ui->kbdfocus = 0;
ui->pbtns = ui->btns;
}
bool iui_mouse_inside(iui* ui, u16 x, u16 y, u16 w, u16 h)
{
return !(ui->x < x || ui->y < y || ui->x >= x + w || ui->y >= y + h);
}
int iui_button(iui* ui, u16 x, u16 y, int w, int h, char* label)
{
xctx* x11 = (xctx*)ui->usr;
usize id = (usize)label;
bool imhot, imactive;
if(iui_mouse_inside(ui, x, y, w, h))
{
bool click = ui->btns & bit(1) && !(ui->pbtns & bit(1));
if(!ui->active && click) ui->active = id;
ui->hot = id;
}
imhot = ui->hot == id;
imactive = ui->active == id;
{
iui_cmd cmd = {0};
cmd.type = IUI_FILL;
cmd.x = x;
cmd.y = y;
cmd.w = w;
cmd.h = h;
if(imhot) cmd.size = 2;
else cmd.size = 1;
if(imactive) cmd.color = x11->cols.as.fg;
else cmd.color = x11->cols.as.bg;
ui->cmds[ui->ncmds++] = cmd;
cmd.type = IUI_BOX;
cmd.color = x11->cols.as.fg;
ui->cmds[ui->ncmds++] = cmd;
cmd.type = IUI_TEXT;
cmd.size = 14;
cmd.text = label;
cmd.flags = IUI_TXT_CENTER;
if(imactive) cmd.color = x11->cols.as.bg;
else cmd.color = x11->cols.as.fg;
ui->cmds[ui->ncmds++] = cmd;
}
return imhot && imactive && !(ui->btns & bit(1));
}
void iui_label(iui* ui, u16 x, u16 y, int w, int h, char* fmt, ...)
{
int len = 0;
char* buf = NULL;
va_list ap = {0};
xctx* x11 = (xctx*)ui->usr;
buf = ar_push(ui->ar, 512);
va_start(ap, fmt);
len = vsnprintf(buf, 511, fmt, ap);
va_end(ap);
{
iui_cmd cmd = {0};
cmd.type = IUI_FILL;
cmd.x = x;
cmd.y = y;
cmd.w = w;
cmd.h = h;
{
iui_cmd clip = cmd;
clip.type = IUI_CLIP;
clip.flags = 0;
clip.x++;
clip.y++;
clip.w--;
clip.h--;
ui->cmds[ui->ncmds++] = clip;
}
{
cmd.type = IUI_TEXT;
cmd.size = 14;
cmd.text = buf;
cmd.flags = 0;
cmd.x = x + 6;
cmd.y = y;
cmd.w = w;
cmd.h = h;
cmd.color = x11->cols.as.fg;
ui->cmds[ui->ncmds++] = cmd;
}
cmd.type = IUI_CLIP;
cmd.flags = IUI_CLIP_CLEAR;
ui->cmds[ui->ncmds++] = cmd;
}
}
int iui_editbox(iui* ui, u16 x, u16 y, int w, int h, char* buf, usize buflen)
{
xctx* x11 = (xctx*)ui->usr;
usize id = (usize)buf;
bool imhot, imactive;
usize len;
len = strlen(buf);
if(iui_mouse_inside(ui, x, y, w, h))
{
bool click = ui->btns & bit(1) && !(ui->pbtns & bit(1));
if(!ui->active && click) ui->active = id;
ui->hot = id;
}
imhot = ui->hot == id;
imactive = ui->active == id;
{
iui_cmd cmd = {0};
cmd.type = IUI_FILL;
cmd.x = x;
cmd.y = y;
cmd.w = w;
cmd.h = h;
if(imhot) cmd.size = 2;
else cmd.size = 1;
cmd.color = x11->cols.as.bg;
ui->cmds[ui->ncmds++] = cmd;
cmd.type = IUI_BOX;
cmd.color = x11->cols.as.fg;
ui->cmds[ui->ncmds++] = cmd;
{
iui_cmd clip = cmd;
clip.type = IUI_CLIP;
clip.flags = 0;
clip.x++;
clip.y++;
clip.w--;
clip.h--;
ui->cmds[ui->ncmds++] = clip;
}
if(imactive) ui->kbdfocus = id;
if(ui->kbdfocus == id)
{
cmd.type = IUI_FILL;
cmd.x = x + 6 + 6 * len;
cmd.y = y + 6;
cmd.w = 10;
cmd.h = h - 12;
cmd.color = x11->cols.as.fg;
ui->cmds[ui->ncmds++] = cmd;
}
else
{
cmd.type = IUI_BOX;
cmd.x = x + 6 + 6 * len;
cmd.y = y + 6;
cmd.w = 9;
cmd.h = h - 13;
cmd.color = x11->cols.as.fg;
cmd.size = 1;
ui->cmds[ui->ncmds++] = cmd;
}
{
cmd.type = IUI_TEXT;
cmd.size = 14;
cmd.text = buf;
cmd.flags = 0;
cmd.x = x + 6;
cmd.y = y;
cmd.w = w;
cmd.h = h;
cmd.color = x11->cols.as.fg;
ui->cmds[ui->ncmds++] = cmd;
}
cmd.type = IUI_CLIP;
cmd.flags = IUI_CLIP_CLEAR;
ui->cmds[ui->ncmds++] = cmd;
}
return imhot && imactive && !(ui->btns & bit(1));
}
void iui_draw(iui* ui);
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