Fix scrolling when application or category list too long #8

This can be tested with `XDGCTL_DEV=100 xdgctl`.

Author Mitja Felicijan <mitja.felicijan@gmail.com> 2026-01-26 12:47:19 +0100
Committer Mitja Felicijan <mitja.felicijan@gmail.com> 2026-01-26 12:47:19 +0100
Commit 7f75293b2a10a94933f63e095b23af0d3ac60cbc (patch)
-rw-r--r-- main.c 42
1 files changed, 33 insertions, 9 deletions
diff --git a/main.c b/main.c
...
30 
typedef struct {
 30 
typedef struct {
31 
	int category_idx;
 31 
	int category_idx;
32 
	int app_idx;
 32 
	int app_idx;
 
  
 33 
	int category_offset;
 
  
 34 
	int app_offset;
33 
	int col; // 0 for category, 1 for app
 35 
	int col; // 0 for category, 1 for app
34 
	char message[512];
 36 
	char message[512];
35 
	GList *cached_apps;
 37 
	GList *cached_apps;
...
105 
  
 107 
  
106 
void draw_categories(State *state) {
 108 
void draw_categories(State *state) {
107 
	int count = get_category_count(state);
 109 
	int count = get_category_count(state);
108 
	for (int i = 0; i < count; ++i) {
 110 
	int height = tb_height() - Y_OFF_START - 1;
 
  
 111 
	for (int i = 0; i < height && (i + state->category_offset) < count; ++i) {
 
  
 112 
		int idx = i + state->category_offset;
109 
		uint16_t fg = COLOR_DEFAULT;
 113 
		uint16_t fg = COLOR_DEFAULT;
110 
		uint16_t bg = TB_DEFAULT;
 114 
		uint16_t bg = TB_DEFAULT;
111 
		if (state->col == 0 && state->category_idx == i) {
 115 
		if (state->col == 0 && state->category_idx == idx) {
112 
			bg = COLOR_SELECTED;
 116 
			bg = COLOR_SELECTED;
113 
		} else if (state->category_idx == i) {
 117 
		} else if (state->category_idx == idx) {
114 
			fg = COLOR_SELECTED;
 118 
			fg = COLOR_SELECTED;
115 
			bg = COLOR_DEFAULT;
 119 
			bg = COLOR_DEFAULT;
116 
		}
 120 
		}
117 
		tb_print(X_OFF_CATEGORIES, Y_OFF_START + i, fg, bg, get_category_name(state, i));
 121 
		tb_print(X_OFF_CATEGORIES, Y_OFF_START + i, fg, bg, get_category_name(state, idx));
118 
	}
 122 
	}
119 
}
 123 
}
120 
  
 124 
  
121 
void draw_apps_list(State *state) {
 125 
void draw_apps_list(State *state) {
 
  
 126 
	int height = tb_height() - Y_OFF_START - 1;
122 
	if (state->is_dev_mode) {
 127 
	if (state->is_dev_mode) {
123 
		int i = 0;
 128 
		int i = 0;
124 
		for (GList *l = state->cached_apps; l != NULL; l = l->next, ++i) {
 129 
		GList *l = g_list_nth(state->cached_apps, state->app_offset);
 
  
 130 
		for (; l != NULL && i < height; l = l->next, ++i) {
 
  
 131 
			int idx = i + state->app_offset;
125 
			char *app_name = (char *)l->data;
 132 
			char *app_name = (char *)l->data;
126 
			uint16_t fg = COLOR_DEFAULT;
 133 
			uint16_t fg = COLOR_DEFAULT;
127 
			uint16_t bg = TB_DEFAULT;
 134 
			uint16_t bg = TB_DEFAULT;
128 
			if (state->col == 1 && state->app_idx == i) {
 135 
			if (state->col == 1 && state->app_idx == idx) {
129 
				bg = COLOR_SELECTED;
 136 
				bg = COLOR_SELECTED;
130 
			}
 137 
			}
131 
			char name[256];
 138 
			char name[256];
...
154 
	}
 161 
	}
155 
  
 162 
  
156 
	int i = 0;
 163 
	int i = 0;
157 
	for (GList *l = state->cached_apps; l != NULL; l = l->next, ++i) {
 164 
	GList *l = g_list_nth(state->cached_apps, state->app_offset);
 
  
 165 
	for (; l != NULL && i < height; l = l->next, ++i) {
 
  
 166 
		int idx = i + state->app_offset;
158 
		GAppInfo *app = (GAppInfo *)l->data;
 167 
		GAppInfo *app = (GAppInfo *)l->data;
159 
		uint16_t fg = COLOR_DEFAULT;
 168 
		uint16_t fg = COLOR_DEFAULT;
160 
		uint16_t bg = TB_DEFAULT;
 169 
		uint16_t bg = TB_DEFAULT;
161 
		if (state->col == 1 && state->app_idx == i) {
 170 
		if (state->col == 1 && state->app_idx == idx) {
162 
			bg = COLOR_SELECTED;
 171 
			bg = COLOR_SELECTED;
163 
		}
 172 
		}
164 
  
 173 
  
...
206 
		return 1;
 215 
		return 1;
207 
	}
 216 
	}
208 
  
 217 
  
209 
	State state = {0, 0, 0, {0}, NULL, 0, 0};
 218 
	State state = {0, 0, 0, 0, 0, {0}, NULL, 0, 0};
210 
	char *dev_env = getenv("XDGCTL_DEV");
 219 
	char *dev_env = getenv("XDGCTL_DEV");
211 
	if (dev_env) {
 220 
	if (dev_env) {
212 
		state.is_dev_mode = 1;
 221 
		state.is_dev_mode = 1;
...
219 
  
 228 
  
220 
	struct tb_event ev;
 229 
	struct tb_event ev;
221 
	while (1) {
 230 
	while (1) {
 
  
 231 
		int visible_height = tb_height() - Y_OFF_START - 1;
 
  
 232 
		if (state.category_idx < state.category_offset) {
 
  
 233 
			state.category_offset = state.category_idx;
 
  
 234 
		} else if (state.category_idx >= state.category_offset + visible_height) {
 
  
 235 
			state.category_offset = state.category_idx - visible_height + 1;
 
  
 236 
		}
 
  
 237 
		if (state.app_idx < state.app_offset) {
 
  
 238 
			state.app_offset = state.app_idx;
 
  
 239 
		} else if (state.app_idx >= state.app_offset + visible_height) {
 
  
 240 
			state.app_offset = state.app_idx - visible_height + 1;
 
  
 241 
		}
 
  
 242 
  
222 
		draw(&state);
 243 
		draw(&state);
223 
		tb_poll_event(&ev);
 244 
		tb_poll_event(&ev);
224 
  
 245 
  
...
232 
					if (state.category_idx > 0) {
 253 
					if (state.category_idx > 0) {
233 
						state.category_idx--;
 254 
						state.category_idx--;
234 
						update_cached_apps(&state);
 255 
						update_cached_apps(&state);
 
  
 256 
						state.app_offset = 0;
235 
						state.message[0] = '\0';
 257 
						state.message[0] = '\0';
236 
					}
 258 
					}
237 
				} else {
 259 
				} else {
...
246 
					if (state.category_idx < count - 1) {
 268 
					if (state.category_idx < count - 1) {
247 
						state.category_idx++;
 269 
						state.category_idx++;
248 
						update_cached_apps(&state);
 270 
						update_cached_apps(&state);
 
  
 271 
						state.app_offset = 0;
249 
						state.message[0] = '\0';
 272 
						state.message[0] = '\0';
250 
					}
 273 
					}
251 
				} else {
 274 
				} else {
...
259 
				if (state.col == 0) {
 282 
				if (state.col == 0) {
260 
					state.col = 1;
 283 
					state.col = 1;
261 
					state.app_idx = 0;
 284 
					state.app_idx = 0;
 
  
 285 
					state.app_offset = 0;
262 
				}
 286 
				}
263 
			} else if (ev.key == TB_KEY_ARROW_LEFT) {
 287 
			} else if (ev.key == TB_KEY_ARROW_LEFT) {
264 
				if (state.col == 1) {
 288 
				if (state.col == 1) {
...