Organize the header files

2 files changed, 268 insertions, 2 deletions

diff --git a/src/ui/CMakeLists.txt b/src/ui/CMakeLists.txt
index 05b2648..23dcae6 100644
--- a/src/ui/CMakeLists.txt
+++ b/src/ui/CMakeLists.txt
@@ -1,4 +1,6 @@
 add_library(daw_ui
-  positioning.c
-  rendering.c
+  src/positioning.c
+  src/rendering.c
   )
+
+target_include_directories(daw_ui PRIVATE include)
diff --git a/src/ui/include/engine/ui/ui.h b/src/ui/include/engine/ui/ui.h
new file mode 100644
index 0000000..4a3cd3e
--- /dev/null
+++ b/src/ui/include/engine/ui/ui.h
@@ -0,0 +1,264 @@
+#ifndef ENGINE_UI_H
+#define ENGINE_UI_H
+
+#include "list.h"
+#include "types.h"
+#include "vector.h"
+
+#define DIRECTION_HORIZONTAL true
+#define DIRECTION_VERTICAL false
+
+/* Ui positioning constraints */
+typedef enum {
+  ui_size_pixel,
+  ui_size_percent,
+} ui_size_t;
+
+typedef union {
+  ui_size_t type;
+  struct {
+    ui_size_t type;
+    i32 value;
+  } pixel;
+  struct {
+    ui_size_t type;
+    f32 value;
+  } percent;
+} ui_size;
+
+typedef enum {
+  ui_constraint_width,
+  ui_constraint_height,
+
+  ui_constraint_horizontal_align,
+  ui_constraint_vertical_align,
+
+  ui_constraint_left,
+  ui_constraint_right,
+  ui_constraint_top,
+  ui_constraint_bottom,
+} ui_constraint_t;
+
+typedef enum {
+  ui_constraint_vertical_align_top,
+  ui_constraint_vertical_align_center,
+  ui_constraint_vertical_align_bottom,
+} ui_constraint_vertical_align_t;
+
+typedef enum {
+  ui_constraint_horizontal_align_left,
+  ui_constraint_horizontal_align_center,
+  ui_constraint_horizontal_align_right,
+} ui_constraint_horizontal_align_t;
+
+typedef union {
+  struct {
+    ui_size size;
+  } width;
+  struct {
+    ui_size size;
+  } height;
+
+  /* spacing is the padding between the aligned edge and the container itself */
+  struct {
+    ui_constraint_horizontal_align_t align;
+    ui_size spacing;
+  } horizontal_align;
+  struct {
+    ui_constraint_vertical_align_t align;
+    ui_size spacing;
+  } vertical_align;
+
+  struct {
+    ui_size pos;
+  } left;
+  struct {
+    ui_size pos;
+  } top;
+  struct {
+    ui_size pos;
+  } right;
+  struct {
+    ui_size pos;
+  } bottom;
+} constraintval_t;
+
+#define CONSTRAINT_POSITION(axis, alignment_sub, margin, cnext)                \
+  {                                                                            \
+    .value =                                                                   \
+        {                                                                      \
+            .type = ui_constraint_##axis##_align,                              \
+            .constraint.axis##_align =                                         \
+                {                                                              \
+                    .align = ui_constraint_##axis##_align_##alignment_sub,     \
+                    .spacing = margin,                                         \
+                },                                                             \
+        },                                                                     \
+    .next = cnext,                                                             \
+  }
+
+#define CONSTRAINT_SIZE(c_type, csize, cnext)                                  \
+  {                                                                            \
+    .value =                                                                   \
+        {                                                                      \
+            .type = ui_constraint_##c_type,                                    \
+            .constraint.c_type =                                               \
+                {                                                              \
+                    .size = csize,                                             \
+                },                                                             \
+        },                                                                     \
+    .next = cnext,                                                             \
+  }
+
+typedef struct {
+  ui_constraint_t type;
+  constraintval_t constraint;
+} ui_constraint;
+
+typedef DEFINE_LLIST(ui_constraint);
+
+enum uitype {
+  uitype_container,
+  uitype_button,
+  uitype_title,
+  uitype_text,
+
+  uitype_MAX,
+};
+
+typedef struct UITree_container {
+  enum uitype type;
+  bool visible;
+  bool direction;
+  i32 x, y, w, h;
+  i32 padding;
+  i32 margin;
+
+  Engine_color fg;
+  Engine_color bg;
+  Engine_color bordercolor;
+
+  usize children_len;  /* Number of children */
+  usize children_size; /* Memory size */
+  union UITree** children;
+  struct List_ui_constraint* constraints;
+} UITree_container;
+
+typedef struct UITree_button {
+  enum uitype type;
+
+  bool enabled;
+  u64 id;
+
+  i32 x, y, w, h;
+  i32 padding;
+  i32 margin;
+
+  Engine_color fg;
+  Engine_color bg;
+
+  i32 font_id;
+  const char* text_original;
+  u64 text_texture_index;
+  v2_i32 texture_size;
+  struct List_ui_constraint* constraints;
+} UITree_button;
+
+typedef struct UITree_title {
+  enum uitype type;
+  i32 x, y, w, h;
+
+  i32 padding;
+  i32 margin;
+
+  Engine_color fg;
+
+  i32 font_id;
+  const char* text_original;
+  u64 text_texture_index;
+  v2_i32 texture_size;
+  struct List_ui_constraint* constraints;
+} UITree_title;
+
+typedef struct UITree_text {
+  enum uitype type;
+  i32 x, y, w, h;
+
+  i32 padding;
+  i32 margin;
+
+  Engine_color fg;
+
+  i32 font_id;
+  const char* text_original;
+  u64 text_texture_index;
+  v2_i32 texture_size;
+  struct List_ui_constraint* constraints;
+} UITree_text;
+
+typedef union UITree {
+  enum uitype type;
+
+  UITree_container container;
+  UITree_button button;
+  UITree_title title;
+  UITree_text text;
+  struct List_ui_constraint constraints;
+} UITree;
+
+/* Sizes */
+f32 ui_size_pixel_to_percent_width(i32 pixels);
+f32 ui_size_pixel_to_percent_height(i32 pixels);
+f32 ui_size_pixel_to_percent(i32 pixels);
+i32 ui_size_percent_width_to_pixel(f32 percent);
+i32 ui_size_percent_height_to_pixel(f32 percent);
+i32 ui_size_percent_to_pixel(f32 percent);
+i32 ui_size_to_pixel(ui_size s);
+
+#define ui_size_percent_new(p)                                                 \
+  {                                                                            \
+    .percent = {.type = ui_size_percent, .value = p }                          \
+  }
+#define ui_size_pixel_new(p)                                                   \
+  {                                                                            \
+    .pixel = {.type = ui_size_pixel, .value = p }                              \
+  }
+
+/* Constructors */
+UITree* ui_container(bool direction, struct List_ui_constraint* constraints);
+UITree* ui_button(u64 id, i32 font_id, char* text,
+                  struct List_ui_constraint* constraints);
+UITree* ui_title(i32 font_id, const char* text,
+                 struct List_ui_constraint* constraints);
+UITree* ui_text(i32 font_id, const char* text,
+                struct List_ui_constraint* constraints);
+
+/* Extended Constructors */
+UITree* ui_container_new_ex(Engine_color fg, Engine_color bg,
+                            Engine_color border, bool direction,
+                            struct List_ui_constraint* constraints);
+
+/* Destructors */
+void clear_ui(void);
+void uitree_free(UITree* t);
+
+/* Manipulation */
+void ui_container_attach(UITree* container, UITree* child);
+
+void ui_resolve_constraints(void);
+
+void ui_button_enable(UITree_button* b);
+void ui_button_disable(UITree_button* b);
+
+/* Tweaking default colors */
+void ui_set_default_colors(Engine_color fg, Engine_color bg);
+void ui_set_default_padding(i32 padding);
+Engine_color ui_get_default_fg(void);
+Engine_color ui_get_default_bg(void);
+
+#define ELEM_NOT_FOUND (-1)
+#define NO_CLICK (-2)
+/* Returns -1 if not found */
+u64 ui_check_click(UITree* root);
+
+#endif