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#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;
u8 border_thickness;
} 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;
ENUM_U16 {
MENU_NONE,
MENU_OPEN
} ENUM_U16_END(Menu);
typedef struct Ted {
Font *font;
TextBuffer *active_buffer;
// while a menu or something is open, there is no active buffer. when the menu is closed,
// the old active buffer needs to be restored. that's what this stores.
TextBuffer *prev_active_buffer;
Settings settings;
float window_width, window_height;
Menu menu;
KeyAction key_actions[KEY_COMBO_COUNT];
char error[256];
} Ted;
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