move ui to ui/

src/ui/ui.h

@@ -0,0 +1,116 @@
+typedef struct ui_code_loc_t ui_code_loc_t;
+struct ui_code_loc_t {
+    char *file;
+    int line;
+    int counter;
+};
+
+typedef struct ui_id_t ui_id_t;
+struct ui_id_t {
+    u64 value;
+};
+
+typedef struct ui_box_flags_t ui_box_flags_t;
+struct ui_box_flags_t {
+    b8 draw_rect: 1;
+    b8 draw_border: 1;
+    b8 draw_text: 1;
+
+    b8 clip_rect : 1;
+};
+
+typedef enum {
+    ui_text_align_left,
+    ui_text_align_center,
+} ui_text_align_t;
+
+typedef enum {
+    ui_op_cut_top,
+    ui_op_cut_bottom,
+    ui_op_cut_left,
+    ui_op_cut_right,
+    ui_op_idle,
+} ui_op_t;
+
+typedef struct ui_box_t ui_box_t;
+struct ui_box_t {
+    ui_box_t *next;
+    ui_box_t *prev;
+    ui_box_t *first;
+    ui_box_t *last;
+    ui_box_t *parent;
+    i32       node_count;
+
+    ui_code_loc_t loc;
+    s8_t          string;
+
+    ui_box_flags_t  flags;
+    b8              created_new;
+    ui_text_align_t text_align;
+
+    ui_op_t op;
+    r2f32_t full_rect;
+    r2f32_t rect;
+
+    // state
+    ui_id_t   id;
+    ui_box_t *hash_next;
+    ui_box_t *hash_prev;
+    u64       last_touched_event_id;
+
+    r2f32_t final_rect;
+    b32     expanded;
+};
+
+typedef struct ui_signal_t ui_signal_t;
+struct ui_signal_t {
+    ui_box_t *box;
+    b8 clicked;
+    b8 dragging;
+};
+
+typedef struct ui_t ui_t;
+struct ui_t {
+    // building
+    ui_box_t root;
+    ui_box_t *top;
+    app_event_t *event;
+    stack_t(ui_id_t, 32) id_stack;
+    ui_text_align_t pref_text_align;
+
+    // allocation
+    ma_arena_t *box_arena;
+    i32 allocated_boxes;
+    ui_box_t *free_first;
+    ui_box_t *hash_first;
+    ui_box_t *hash_last;
+
+    // interaction
+    ui_id_t hot;
+    ui_id_t active;
+
+    // drawing
+    r2f32_t clip_rect;
+};
+
+ui_t *ui;
+
+gb_read_only ui_id_t ui_null_id;
+gb_read_only ui_box_t ui_null_box;
+gb_read_only ui_box_flags_t ui_null_flags;
+
+fn b32 ui_is_null_id(ui_id_t id) { return id.value == 0; }
+fn b32 ui_is_null_box(ui_box_t *box) { return box->id.value == 0; }
+fn b32 ui_is_hot_box(ui_box_t *box) { return !ui_is_null_box(box) && box->id.value == ui->hot.value; }
+fn b32 ui_is_active_box(ui_box_t *box) { return !ui_is_null_box(box) && box->id.value == ui->active.value; }
+
+#define ev_left(ev) ((ev)->mouse_button == app_mouse_button_left)
+#define ev_left_up(ev) ((ev)->kind == app_event_kind_mouse_up && ev_left(ev))
+#define ev_left_down(ev) ((ev)->kind == app_event_kind_mouse_down && ev_left(ev))
+
+fn void ui_set_rect(ui_box_t *box, r2f32_t rect) { box->rect = box->full_rect = rect; }
+
+#define UILOC (ui_code_loc_t){.file = __FILE__, .line = __LINE__, .counter = __COUNTER__}
+#define ui_em(x) ((x) * rn_state.main_font->size)
+#define ui_max 200000000.f
+#define ui_box_flags(...) (ui_box_flag_t){__VA_ARGS__}