3 #include "edit_field.h"
4 #include "game/camera.h"
5 #include "game/sprite_font.h"
6 #include "sdl/renderer.h"
8 #include "system/nth_alloc.h"
9 #include "system/stacktrace.h"
11 #define BUFFER_CAPACITY 256
23 static void edit_field_left(Edit_field *edit_field);
24 static void edit_field_right(Edit_field *edit_field);
25 static void edit_field_backspace(Edit_field *edit_field);
26 static void edit_field_delete(Edit_field *edit_field);
27 static void edit_field_insert_char(Edit_field *edit_field, char c);
29 Edit_field *create_edit_field(Vec font_size,
34 Edit_field *const edit_field = PUSH_LT(lt, nth_calloc(1, sizeof(Edit_field)), free);
35 if (edit_field == NULL) {
40 edit_field->buffer = PUSH_LT(lt, nth_calloc(1, sizeof(char) * (BUFFER_CAPACITY + 10)), free);
41 if (edit_field->buffer == NULL) {
45 edit_field->buffer_size = 0;
46 edit_field->cursor = 0;
47 edit_field->font_size = font_size;
48 edit_field->font_color = font_color;
50 edit_field->buffer[edit_field->buffer_size] = 0;
55 void destroy_edit_field(Edit_field *edit_field)
57 trace_assert(edit_field);
58 RETURN_LT0(edit_field->lt);
61 int edit_field_render(const Edit_field *edit_field,
63 Point screen_position)
65 trace_assert(edit_field);
68 const float cursor_y_overflow = 10.0f;
69 const float cursor_width = 2.0f;
71 if (camera_render_text_screen(
74 edit_field->font_size,
75 edit_field->font_color,
76 screen_position) < 0) {
80 /* TODO(#363): the size of the cursor does not correspond to font size */
81 if (camera_fill_rect_screen(
83 rect(screen_position.x + (float) edit_field->cursor * (float) FONT_CHAR_WIDTH * edit_field->font_size.x,
84 screen_position.y - cursor_y_overflow,
86 FONT_CHAR_HEIGHT * edit_field->font_size.y + cursor_y_overflow * 2.0f),
87 edit_field->font_color) < 0) {
94 const char *edit_field_as_text(const Edit_field *edit_field)
96 trace_assert(edit_field);
97 return edit_field->buffer;
100 static void edit_field_left(Edit_field *edit_field)
102 if (edit_field->cursor > 0) {
103 edit_field->cursor--;
107 static void edit_field_right(Edit_field *edit_field)
109 trace_assert(edit_field);
110 if (edit_field->cursor < edit_field->buffer_size) {
111 edit_field->cursor++;
115 static void edit_field_backspace(Edit_field *edit_field)
117 trace_assert(edit_field);
119 if (edit_field->cursor == 0) {
123 for (size_t i = edit_field->cursor; i < edit_field->buffer_size; ++i) {
124 edit_field->buffer[i - 1] = edit_field->buffer[i];
127 edit_field->cursor--;
128 edit_field->buffer[--edit_field->buffer_size] = 0;
131 static void edit_field_delete(Edit_field *edit_field)
133 trace_assert(edit_field);
135 if (edit_field->cursor >= edit_field->buffer_size) {
139 for (size_t i = edit_field->cursor; i < edit_field->buffer_size; ++i) {
140 edit_field->buffer[i] = edit_field->buffer[i + 1];
143 edit_field->buffer[--edit_field->buffer_size] = 0;
146 static void edit_field_insert_char(Edit_field *edit_field, char c)
148 trace_assert(edit_field);
150 if (edit_field->buffer_size >= BUFFER_CAPACITY) {
154 for (int64_t i = (int64_t) edit_field->buffer_size - 1; i >= (int64_t) edit_field->cursor; --i) {
155 edit_field->buffer[i + 1] = edit_field->buffer[i];
158 edit_field->buffer[edit_field->cursor++] = c;
159 edit_field->buffer[++edit_field->buffer_size] = 0;
162 void edit_field_clean(Edit_field *edit_field)
164 trace_assert(edit_field);
166 edit_field->cursor = 0;
167 edit_field->buffer_size = 0;
168 edit_field->buffer[0] = 0;
171 void edit_field_replace(Edit_field *edit_field, const char *text)
173 trace_assert(edit_field);
175 edit_field_clean(edit_field);
181 size_t n = strlen(text);
182 for (size_t i = 0; i < n; ++i) {
183 edit_field_insert_char(edit_field, text[i]);
187 int edit_field_keyboard(Edit_field *edit_field,
188 const SDL_KeyboardEvent *key)
190 trace_assert(edit_field);
193 if (key->type == SDL_KEYDOWN) {
194 switch (key->keysym.sym) {
196 edit_field_left(edit_field);
200 edit_field_right(edit_field);
204 edit_field_backspace(edit_field);
208 edit_field_delete(edit_field);
218 int edit_field_text_input(Edit_field *edit_field,
219 const SDL_TextInputEvent *text_input)
221 trace_assert(edit_field);
222 trace_assert(text_input);
224 size_t n = strlen(text_input->text);
225 for (size_t i = 0; i < n; ++i) {
226 edit_field_insert_char(edit_field, text_input->text[i]);