1 files changed, 74 insertions, 0 deletions
diff --git a/ted.h b/ted.h
new file mode 100644
index 0000000..0f5b72c
--- /dev/null
+++ b/ted.h
@@ -0,0 +1,74 @@
+#define TEXT_SIZE_MIN 6
+#define TEXT_SIZE_MAX 70
+
+typedef struct {
+	float cursor_blink_time_on, cursor_blink_time_off;
+	u32 colors[COLOR_COUNT];
+	u16 text_size;
+	u8 tab_width;
+	u8 cursor_width;
+	u8 undo_save_time;
+} Settings;
+
+#define SCANCODE_COUNT 0x120 // SDL scancodes should be less than this value.
+// a "key combo" is some subset of {control, shift, alt} + some key.
+#define KEY_COMBO_COUNT (SCANCODE_COUNT << 3)
+#define KEY_MODIFIER_CTRL_BIT 0
+#define KEY_MODIFIER_SHIFT_BIT 1
+#define KEY_MODIFIER_ALT_BIT 2
+#define KEY_MODIFIER_CTRL (1<<KEY_MODIFIER_CTRL_BIT)
+#define KEY_MODIFIER_SHIFT (1<<KEY_MODIFIER_SHIFT_BIT)
+#define KEY_MODIFIER_ALT (1<<KEY_MODIFIER_ALT_BIT)
+// ctrl+alt+c is encoded as SDL_SCANCODE_C << 3 | KEY_MODIFIER_CTRL | KEY_MODIFIER_ALT
+
+typedef struct {
+	u32 line_number; // config line number where this was set
+	Command command; // this will be 0 (COMMAND_UNKNOWN) if there's no action for the key
+	i64 argument;
+} KeyAction;
+
+// a position in the buffer
+typedef struct {
+	u32 line;
+	u32 index; // index of character in line (not the same as column, since a tab is settings->tab_width columns)
+} BufferPos;
+
+typedef struct {
+	u32 len;
+	u32 capacity;
+	char32_t *str;
+} Line;
+
+// this refers to replacing prev_len characters (found in prev_text) at pos with new_len characters
+typedef struct BufferEdit {
+	BufferPos pos;
+	u32 new_len;
+	u32 prev_len;
+	char32_t *prev_text;
+	double time; // time at start of edit (i.e. the time just before the edit), in seconds since epoch
+} BufferEdit;
+
+typedef struct {
+	char const *filename;
+	struct Ted *ted; // we keep a back-pointer to the ted instance so we don't have to pass it in to every buffer function
+	double scroll_x, scroll_y; // number of characters scrolled in the x/y direction
+	BufferPos cursor_pos;
+	BufferPos selection_pos; // if selection is true, the text between selection_pos and cursor_pos is selected.
+	bool selection;
+	bool store_undo_events; // set to false to disable undo events
+	float x1, y1, x2, y2;
+	u32 nlines;
+	u32 lines_capacity;
+	Line *lines;
+	char error[128];
+	BufferEdit *undo_history; // dynamic array of undo history
+	BufferEdit *redo_history; // dynamic array of redo history
+} TextBuffer;
+
+typedef struct Ted {
+	Font *font;
+	TextBuffer *active_buffer;
+	Settings settings;
+	KeyAction key_actions[KEY_COMBO_COUNT];
+	char error[256];
+} Ted;