4 #include "edit_field.h"
5 #include "game/sprite_font.h"
6 #include "sdl/renderer.h"
7 #include "system/error.h"
10 #define BUFFER_CAPACITY 256
18 const Sprite_font *font;
24 static void edit_field_left(Edit_field *edit_field);
25 static void edit_field_right(Edit_field *edit_field);
26 static void edit_field_backspace(Edit_field *edit_field);
27 static void edit_field_delete(Edit_field *edit_field);
28 static void edit_field_insert_char(Edit_field *edit_field, char c);
30 static char shift_char(char c)
34 } else if (c == '0') {
36 } else if (c == '=') {
38 } else if (c == '\'') {
45 Edit_field *create_edit_field(const Sprite_font *font,
57 Edit_field *const edit_field = PUSH_LT(lt, malloc(sizeof(Edit_field)), free);
58 if (edit_field == NULL) {
59 throw_error(ERROR_TYPE_LIBC);
64 edit_field->buffer = PUSH_LT(lt, malloc(sizeof(char) * (BUFFER_CAPACITY + 10)), free);
65 if (edit_field->buffer == NULL) {
66 throw_error(ERROR_TYPE_LIBC);
70 edit_field->buffer_size = 0;
71 edit_field->cursor = 0;
72 edit_field->font = font;
73 edit_field->font_size = font_size;
74 edit_field->font_color = font_color;
75 edit_field->shift_key = false;
77 edit_field->buffer[edit_field->buffer_size] = 0;
82 void destroy_edit_field(Edit_field *edit_field)
85 RETURN_LT0(edit_field->lt);
88 int edit_field_render(const Edit_field *edit_field,
89 SDL_Renderer *renderer,
95 const float cursor_y_overflow = 10.0f;
96 const float cursor_width = 2.0f;
98 if (sprite_font_render_text(edit_field->font,
101 edit_field->font_size,
102 edit_field->font_color,
103 edit_field->buffer) < 0) {
109 rect(position.x + (float) edit_field->cursor * (float) FONT_CHAR_WIDTH * edit_field->font_size.x,
110 position.y - cursor_y_overflow,
112 FONT_CHAR_HEIGHT * edit_field->font_size.y + cursor_y_overflow * 2.0f),
113 edit_field->font_color) < 0) {
120 int edit_field_handle_event(Edit_field *edit_field,
121 const SDL_Event *event)
126 switch (event->type) {
128 switch (event->key.keysym.sym) {
130 edit_field_left(edit_field);
134 edit_field_right(edit_field);
138 edit_field_backspace(edit_field);
143 edit_field->shift_key = true;
147 edit_field_delete(edit_field);
151 edit_field_insert_char(edit_field, (char) event->key.keysym.sym);
157 switch (event->key.keysym.sym) {
160 edit_field->shift_key = false;
173 const char *edit_field_as_text(const Edit_field *edit_field)
176 return edit_field->buffer;
179 static void edit_field_left(Edit_field *edit_field)
181 if (edit_field->cursor > 0) {
182 edit_field->cursor--;
186 static void edit_field_right(Edit_field *edit_field)
189 if (edit_field->cursor < edit_field->buffer_size) {
190 edit_field->cursor++;
194 static void edit_field_backspace(Edit_field *edit_field)
198 if (edit_field->cursor == 0) {
202 for (size_t i = edit_field->cursor; i < edit_field->buffer_size; ++i) {
203 edit_field->buffer[i - 1] = edit_field->buffer[i];
206 edit_field->cursor--;
207 edit_field->buffer[--edit_field->buffer_size] = 0;
210 static void edit_field_delete(Edit_field *edit_field)
214 if (edit_field->cursor >= edit_field->buffer_size) {
218 for (size_t i = edit_field->cursor; i < edit_field->buffer_size; ++i) {
219 edit_field->buffer[i] = edit_field->buffer[i + 1];
222 edit_field->buffer[--edit_field->buffer_size] = 0;
225 static void edit_field_insert_char(Edit_field *edit_field, char c)
229 if (edit_field->shift_key) {
233 if (edit_field->buffer_size >= BUFFER_CAPACITY) {
237 for (int64_t i = (int64_t) edit_field->buffer_size - 1; i >= (int64_t) edit_field->cursor; --i) {
238 edit_field->buffer[i + 1] = edit_field->buffer[i];
241 edit_field->buffer[edit_field->cursor++] = c;
242 edit_field->buffer[++edit_field->buffer_size] = 0;
245 void edit_field_clean(Edit_field *edit_field)
247 edit_field->cursor = 0;
248 edit_field->buffer_size = 0;
249 edit_field->buffer[0] = 0;