diff options
author | Florian Franzen <Florian.Franzen@gmail.com> | 2022-04-23 10:27:47 +0200 |
---|---|---|
committer | Simon Ser <contact@emersion.fr> | 2022-05-30 12:20:43 +0200 |
commit | cab2189aa64d04ba79dc2cbf19400435b47cdbd2 (patch) | |
tree | 450ac51fbc75c73ed1dc6728bc05b08366ace785 /common | |
parent | Add a Hindi (हिन्दी) translation to the README (diff) | |
download | sway-cab2189aa64d04ba79dc2cbf19400435b47cdbd2.tar.gz sway-cab2189aa64d04ba79dc2cbf19400435b47cdbd2.tar.zst sway-cab2189aa64d04ba79dc2cbf19400435b47cdbd2.zip |
sway: add bindgesture command
Co-authored-by: Michael Weiser <michael.weiser@gmx.de>
Diffstat (limited to 'common')
-rw-r--r-- | common/gesture.c | 350 | ||||
-rw-r--r-- | common/meson.build | 1 |
2 files changed, 351 insertions, 0 deletions
diff --git a/common/gesture.c b/common/gesture.c new file mode 100644 index 00000000..8c2efe99 --- /dev/null +++ b/common/gesture.c | |||
@@ -0,0 +1,350 @@ | |||
1 | #define _POSIX_C_SOURCE 200809L | ||
2 | #include "gesture.h" | ||
3 | |||
4 | #include <math.h> | ||
5 | #include <stdarg.h> | ||
6 | #include <stdio.h> | ||
7 | #include <stdlib.h> | ||
8 | #include <string.h> | ||
9 | #include "list.h" | ||
10 | #include "log.h" | ||
11 | #include "stringop.h" | ||
12 | |||
13 | const uint8_t GESTURE_FINGERS_ANY = 0; | ||
14 | |||
15 | // Helper to easily allocate and format string | ||
16 | static char *strformat(const char *format, ...) { | ||
17 | va_list args; | ||
18 | va_start(args, format); | ||
19 | int length = vsnprintf(NULL, 0, format, args) + 1; | ||
20 | va_end(args); | ||
21 | |||
22 | char *result = malloc(length); | ||
23 | if (result) { | ||
24 | va_start(args, format); | ||
25 | vsnprintf(result, length, format, args); | ||
26 | va_end(args); | ||
27 | } | ||
28 | |||
29 | return result; | ||
30 | } | ||
31 | |||
32 | char *gesture_parse(const char *input, struct gesture *output) { | ||
33 | // Clear output in case of failure | ||
34 | output->type = GESTURE_TYPE_NONE; | ||
35 | output->fingers = GESTURE_FINGERS_ANY; | ||
36 | output->directions = GESTURE_DIRECTION_NONE; | ||
37 | |||
38 | // Split input type, fingers and directions | ||
39 | list_t *split = split_string(input, ":"); | ||
40 | if (split->length < 1 || split->length > 3) { | ||
41 | return strformat( | ||
42 | "expected <gesture>[:<fingers>][:direction], got %s", | ||
43 | input); | ||
44 | } | ||
45 | |||
46 | // Parse gesture type | ||
47 | if (strcmp(split->items[0], "hold") == 0) { | ||
48 | output->type = GESTURE_TYPE_HOLD; | ||
49 | } else if (strcmp(split->items[0], "pinch") == 0) { | ||
50 | output->type = GESTURE_TYPE_PINCH; | ||
51 | } else if (strcmp(split->items[0], "swipe") == 0) { | ||
52 | output->type = GESTURE_TYPE_SWIPE; | ||
53 | } else { | ||
54 | return strformat("expected hold|pinch|swipe, got %s", | ||
55 | split->items[0]); | ||
56 | } | ||
57 | |||
58 | // Parse optional arguments | ||
59 | if (split->length > 1) { | ||
60 | char *next = split->items[1]; | ||
61 | |||
62 | // Try to parse as finger count (1-9) | ||
63 | if (strlen(next) == 1 && '1' <= next[0] && next[0] <= '9') { | ||
64 | output->fingers = atoi(next); | ||
65 | |||
66 | // Move to next if available | ||
67 | next = split->length == 3 ? split->items[2] : NULL; | ||
68 | } else if (split->length == 3) { | ||
69 | // Fail here if argument can only be finger count | ||
70 | return strformat("expected 1-9, got %s", next); | ||
71 | } | ||
72 | |||
73 | // If there is an argument left, try to parse as direction | ||
74 | if (next) { | ||
75 | list_t *directions = split_string(next, "+"); | ||
76 | |||
77 | for (int i = 0; i < directions->length; ++i) { | ||
78 | const char *item = directions->items[i]; | ||
79 | if (strcmp(item, "any") == 0) { | ||
80 | continue; | ||
81 | } else if (strcmp(item, "up") == 0) { | ||
82 | output->directions |= GESTURE_DIRECTION_UP; | ||
83 | } else if (strcmp(item, "down") == 0) { | ||
84 | output->directions |= GESTURE_DIRECTION_DOWN; | ||
85 | } else if (strcmp(item, "left") == 0) { | ||
86 | output->directions |= GESTURE_DIRECTION_LEFT; | ||
87 | } else if (strcmp(item, "right") == 0) { | ||
88 | output->directions |= GESTURE_DIRECTION_RIGHT; | ||
89 | } else if (strcmp(item, "inward") == 0) { | ||
90 | output->directions |= GESTURE_DIRECTION_INWARD; | ||
91 | } else if (strcmp(item, "outward") == 0) { | ||
92 | output->directions |= GESTURE_DIRECTION_OUTWARD; | ||
93 | } else if (strcmp(item, "clockwise") == 0) { | ||
94 | output->directions |= GESTURE_DIRECTION_CLOCKWISE; | ||
95 | } else if (strcmp(item, "counterclockwise") == 0) { | ||
96 | output->directions |= GESTURE_DIRECTION_COUNTERCLOCKWISE; | ||
97 | } else { | ||
98 | return strformat("expected direction, got %s", item); | ||
99 | } | ||
100 | } | ||
101 | list_free_items_and_destroy(directions); | ||
102 | } | ||
103 | } // if optional args | ||
104 | |||
105 | list_free_items_and_destroy(split); | ||
106 | |||
107 | return NULL; | ||
108 | } | ||
109 | |||
110 | const char *gesture_type_string(enum gesture_type type) { | ||
111 | switch (type) { | ||
112 | case GESTURE_TYPE_NONE: | ||
113 | return "none"; | ||
114 | case GESTURE_TYPE_HOLD: | ||
115 | return "hold"; | ||
116 | case GESTURE_TYPE_PINCH: | ||
117 | return "pinch"; | ||
118 | case GESTURE_TYPE_SWIPE: | ||
119 | return "swipe"; | ||
120 | } | ||
121 | |||
122 | return NULL; | ||
123 | } | ||
124 | |||
125 | const char *gesture_direction_string(enum gesture_direction direction) { | ||
126 | switch (direction) { | ||
127 | case GESTURE_DIRECTION_NONE: | ||
128 | return "none"; | ||
129 | case GESTURE_DIRECTION_UP: | ||
130 | return "up"; | ||
131 | case GESTURE_DIRECTION_DOWN: | ||
132 | return "down"; | ||
133 | case GESTURE_DIRECTION_LEFT: | ||
134 | return "left"; | ||
135 | case GESTURE_DIRECTION_RIGHT: | ||
136 | return "right"; | ||
137 | case GESTURE_DIRECTION_INWARD: | ||
138 | return "inward"; | ||
139 | case GESTURE_DIRECTION_OUTWARD: | ||
140 | return "outward"; | ||
141 | case GESTURE_DIRECTION_CLOCKWISE: | ||
142 | return "clockwise"; | ||
143 | case GESTURE_DIRECTION_COUNTERCLOCKWISE: | ||
144 | return "counterclockwise"; | ||
145 | } | ||
146 | |||
147 | return NULL; | ||
148 | } | ||
149 | |||
150 | // Helper to turn combination of directions flags into string representation. | ||
151 | static char *gesture_directions_to_string(uint32_t directions) { | ||
152 | char *result = NULL; | ||
153 | |||
154 | for (uint8_t bit = 0; bit < 32; bit++) { | ||
155 | uint32_t masked = directions & (1 << bit); | ||
156 | if (masked) { | ||
157 | const char *name = gesture_direction_string(masked); | ||
158 | |||
159 | if (!name) { | ||
160 | name = "unknown"; | ||
161 | } | ||
162 | |||
163 | if (!result) { | ||
164 | result = strdup(name); | ||
165 | } else { | ||
166 | char *new = strformat("%s+%s", result, name); | ||
167 | free(result); | ||
168 | result = new; | ||
169 | } | ||
170 | } | ||
171 | } | ||
172 | |||
173 | if(!result) { | ||
174 | return strdup("any"); | ||
175 | } | ||
176 | |||
177 | return result; | ||
178 | } | ||
179 | |||
180 | char *gesture_to_string(struct gesture *gesture) { | ||
181 | char *directions = gesture_directions_to_string(gesture->directions); | ||
182 | char *result = strformat("%s:%u:%s", | ||
183 | gesture_type_string(gesture->type), | ||
184 | gesture->fingers, directions); | ||
185 | free(directions); | ||
186 | return result; | ||
187 | } | ||
188 | |||
189 | bool gesture_check(struct gesture *target, enum gesture_type type, uint8_t fingers) { | ||
190 | // Check that gesture type matches | ||
191 | if (target->type != type) { | ||
192 | return false; | ||
193 | } | ||
194 | |||
195 | // Check that finger count matches | ||
196 | if (target->fingers != GESTURE_FINGERS_ANY && target->fingers != fingers) { | ||
197 | return false; | ||
198 | } | ||
199 | |||
200 | return true; | ||
201 | } | ||
202 | |||
203 | bool gesture_match(struct gesture *target, struct gesture *to_match, bool exact) { | ||
204 | // Check type and fingers | ||
205 | if (!gesture_check(target, to_match->type, to_match->fingers)) { | ||
206 | return false; | ||
207 | } | ||
208 | |||
209 | // Enforce exact matches ... | ||
210 | if (exact && target->directions != to_match->directions) { | ||
211 | return false; | ||
212 | } | ||
213 | |||
214 | // ... or ensure all target directions are matched | ||
215 | return (target->directions & to_match->directions) == target->directions; | ||
216 | } | ||
217 | |||
218 | bool gesture_equal(struct gesture *a, struct gesture *b) { | ||
219 | return a->type == b->type | ||
220 | && a->fingers == b->fingers | ||
221 | && a->directions == b->directions; | ||
222 | } | ||
223 | |||
224 | // Return count of set bits in directions bit field. | ||
225 | static uint8_t gesture_directions_count(uint32_t directions) { | ||
226 | uint8_t count = 0; | ||
227 | for (; directions; directions >>= 1) { | ||
228 | count += directions & 1; | ||
229 | } | ||
230 | return count; | ||
231 | } | ||
232 | |||
233 | // Compare direction bit count of two direction. | ||
234 | static int8_t gesture_directions_compare(uint32_t a, uint32_t b) { | ||
235 | return gesture_directions_count(a) - gesture_directions_count(b); | ||
236 | } | ||
237 | |||
238 | // Compare two direction based on their direction bit count | ||
239 | int8_t gesture_compare(struct gesture *a, struct gesture *b) { | ||
240 | return gesture_directions_compare(a->directions, b->directions); | ||
241 | } | ||
242 | |||
243 | void gesture_tracker_begin(struct gesture_tracker *tracker, | ||
244 | enum gesture_type type, uint8_t fingers) { | ||
245 | tracker->type = type; | ||
246 | tracker->fingers = fingers; | ||
247 | |||
248 | tracker->dx = 0.0; | ||
249 | tracker->dy = 0.0; | ||
250 | tracker->scale = 1.0; | ||
251 | tracker->rotation = 0.0; | ||
252 | |||
253 | sway_log(SWAY_DEBUG, "begin tracking %s:%u:? gesture", | ||
254 | gesture_type_string(type), fingers); | ||
255 | } | ||
256 | |||
257 | bool gesture_tracker_check(struct gesture_tracker *tracker, enum gesture_type type) { | ||
258 | return tracker->type == type; | ||
259 | } | ||
260 | |||
261 | void gesture_tracker_update(struct gesture_tracker *tracker, | ||
262 | double dx, double dy, double scale, double rotation) { | ||
263 | if (tracker->type == GESTURE_TYPE_HOLD) { | ||
264 | sway_assert(false, "hold does not update."); | ||
265 | return; | ||
266 | } | ||
267 | |||
268 | tracker->dx += dx; | ||
269 | tracker->dy += dy; | ||
270 | |||
271 | if (tracker->type == GESTURE_TYPE_PINCH) { | ||
272 | tracker->scale = scale; | ||
273 | tracker->rotation += rotation; | ||
274 | } | ||
275 | |||
276 | sway_log(SWAY_DEBUG, "update tracking %s:%u:? gesture: %f %f %f %f", | ||
277 | gesture_type_string(tracker->type), | ||
278 | tracker->fingers, | ||
279 | tracker->dx, tracker->dy, | ||
280 | tracker->scale, tracker->rotation); | ||
281 | } | ||
282 | |||
283 | void gesture_tracker_cancel(struct gesture_tracker *tracker) { | ||
284 | sway_log(SWAY_DEBUG, "cancel tracking %s:%u:? gesture", | ||
285 | gesture_type_string(tracker->type), tracker->fingers); | ||
286 | |||
287 | tracker->type = GESTURE_TYPE_NONE; | ||
288 | } | ||
289 | |||
290 | struct gesture *gesture_tracker_end(struct gesture_tracker *tracker) { | ||
291 | struct gesture *result = calloc(1, sizeof(struct gesture)); | ||
292 | |||
293 | // Ignore gesture under some threshold | ||
294 | // TODO: Make configurable | ||
295 | const double min_rotation = 5; | ||
296 | const double min_scale_delta = 0.1; | ||
297 | |||
298 | // Determine direction | ||
299 | switch(tracker->type) { | ||
300 | // Gestures with scale and rotation | ||
301 | case GESTURE_TYPE_PINCH: | ||
302 | if (tracker->rotation > min_rotation) { | ||
303 | result->directions |= GESTURE_DIRECTION_CLOCKWISE; | ||
304 | } | ||
305 | if (tracker->rotation < -min_rotation) { | ||
306 | result->directions |= GESTURE_DIRECTION_COUNTERCLOCKWISE; | ||
307 | } | ||
308 | |||
309 | if (tracker->scale > (1.0 + min_scale_delta)) { | ||
310 | result->directions |= GESTURE_DIRECTION_OUTWARD; | ||
311 | } | ||
312 | if (tracker->scale < (1.0 - min_scale_delta)) { | ||
313 | result->directions |= GESTURE_DIRECTION_INWARD; | ||
314 | } | ||
315 | __attribute__ ((fallthrough)); | ||
316 | // Gestures with dx and dy | ||
317 | case GESTURE_TYPE_SWIPE: | ||
318 | if (fabs(tracker->dx) > fabs(tracker->dy)) { | ||
319 | if (tracker->dx > 0) { | ||
320 | result->directions |= GESTURE_DIRECTION_RIGHT; | ||
321 | } else { | ||
322 | result->directions |= GESTURE_DIRECTION_LEFT; | ||
323 | } | ||
324 | } else { | ||
325 | if (tracker->dy > 0) { | ||
326 | result->directions |= GESTURE_DIRECTION_DOWN; | ||
327 | } else { | ||
328 | result->directions |= GESTURE_DIRECTION_UP; | ||
329 | } | ||
330 | } | ||
331 | // Gesture without any direction | ||
332 | case GESTURE_TYPE_HOLD: | ||
333 | break; | ||
334 | // Not tracking any gesture | ||
335 | case GESTURE_TYPE_NONE: | ||
336 | sway_assert(false, "Not tracking any gesture."); | ||
337 | return result; | ||
338 | } | ||
339 | |||
340 | result->type = tracker->type; | ||
341 | result->fingers = tracker->fingers; | ||
342 | |||
343 | char *description = gesture_to_string(result); | ||
344 | sway_log(SWAY_DEBUG, "end tracking gesture: %s", description); | ||
345 | free(description); | ||
346 | |||
347 | tracker->type = GESTURE_TYPE_NONE; | ||
348 | |||
349 | return result; | ||
350 | } | ||
diff --git a/common/meson.build b/common/meson.build index c653dd72..3756075a 100644 --- a/common/meson.build +++ b/common/meson.build | |||
@@ -3,6 +3,7 @@ lib_sway_common = static_library( | |||
3 | files( | 3 | files( |
4 | 'background-image.c', | 4 | 'background-image.c', |
5 | 'cairo.c', | 5 | 'cairo.c', |
6 | 'gesture.c', | ||
6 | 'ipc-client.c', | 7 | 'ipc-client.c', |
7 | 'log.c', | 8 | 'log.c', |
8 | 'loop.c', | 9 | 'loop.c', |