3 #include "edit_field.h"
4 #include "game/sprite_font.h"
5 #include "sdl/renderer.h"
6 #include "system/error.h"
9 #define BUFFER_CAPACITY 256
17 const Sprite_font *font;
22 static void edit_field_left(Edit_field *edit_field);
23 static void edit_field_right(Edit_field *edit_field);
24 static void edit_field_backspace(Edit_field *edit_field);
25 static void edit_field_delete(Edit_field *edit_field);
26 static void edit_field_insert_char(Edit_field *edit_field, char c);
28 Edit_field *create_edit_field(const Sprite_font *font,
40 Edit_field *const edit_field = PUSH_LT(lt, malloc(sizeof(Edit_field)), free);
41 if (edit_field == NULL) {
42 throw_error(ERROR_TYPE_LIBC);
47 edit_field->buffer = PUSH_LT(lt, malloc(sizeof(char) * (BUFFER_CAPACITY + 10)), free);
48 if (edit_field->buffer == NULL) {
49 throw_error(ERROR_TYPE_LIBC);
53 edit_field->buffer_size = 0;
54 edit_field->cursor = 0;
55 edit_field->font = font;
56 edit_field->font_size = font_size;
57 edit_field->font_color = font_color;
59 edit_field->buffer[edit_field->buffer_size] = 0;
64 void destroy_edit_field(Edit_field *edit_field)
67 RETURN_LT0(edit_field->lt);
70 int edit_field_render(const Edit_field *edit_field,
71 SDL_Renderer *renderer,
77 const float cursor_y_overflow = 10.0f;
78 const float cursor_width = 2.0f;
80 if (sprite_font_render_text(edit_field->font,
83 edit_field->font_size,
84 edit_field->font_color,
85 edit_field->buffer) < 0) {
91 rect(position.x + (float) edit_field->cursor * (float) FONT_CHAR_WIDTH * edit_field->font_size.x,
92 position.y - cursor_y_overflow,
94 FONT_CHAR_HEIGHT * edit_field->font_size.y + cursor_y_overflow * 2.0f),
95 edit_field->font_color) < 0) {
102 int edit_field_handle_event(Edit_field *edit_field,
103 const SDL_Event *event)
108 switch (event->type) {
110 switch (event->key.keysym.sym) {
112 edit_field_left(edit_field);
116 edit_field_right(edit_field);
120 edit_field_backspace(edit_field);
124 edit_field_delete(edit_field);
128 edit_field_insert_char(edit_field, (char) event->key.keysym.sym);
139 const char *edit_field_as_text(const Edit_field *edit_field)
142 return edit_field->buffer;
145 static void edit_field_left(Edit_field *edit_field)
147 if (edit_field->cursor > 0) {
148 edit_field->cursor--;
152 static void edit_field_right(Edit_field *edit_field)
155 if (edit_field->cursor < edit_field->buffer_size) {
156 edit_field->cursor++;
160 static void edit_field_backspace(Edit_field *edit_field)
164 if (edit_field->cursor == 0) {
168 for (size_t i = edit_field->cursor; i < edit_field->buffer_size; ++i) {
169 edit_field->buffer[i - 1] = edit_field->buffer[i];
172 edit_field->cursor--;
173 edit_field->buffer[--edit_field->buffer_size] = 0;
176 static void edit_field_delete(Edit_field *edit_field)
180 if (edit_field->cursor >= edit_field->buffer_size) {
184 for (size_t i = edit_field->cursor; i < edit_field->buffer_size; ++i) {
185 edit_field->buffer[i] = edit_field->buffer[i + 1];
188 edit_field->buffer[--edit_field->buffer_size] = 0;
191 static void edit_field_insert_char(Edit_field *edit_field, char c)
195 if (edit_field->buffer_size >= BUFFER_CAPACITY) {
199 for (int64_t i = (int64_t) edit_field->buffer_size - 1; i >= (int64_t) edit_field->cursor; --i) {
200 edit_field->buffer[i + 1] = edit_field->buffer[i];
203 edit_field->buffer[edit_field->cursor++] = c;
204 edit_field->buffer[++edit_field->buffer_size] = 0;