Jonas Ådahl | 61831f4 | 2016-03-15 18:14:00 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2010 Intel Corporation |
| 3 | * Copyright © 2012 Collabora, Ltd. |
| 4 | * Copyright © 2012 Jonas Ådahl |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice (including the next |
| 14 | * paragraph) shall be included in all copies or substantial portions of the |
| 15 | * Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 23 | * DEALINGS IN THE SOFTWARE. |
| 24 | */ |
| 25 | |
| 26 | #include "config.h" |
| 27 | |
Jonas Ådahl | fdeb2bb | 2014-11-26 17:47:29 +0800 | [diff] [blame^] | 28 | #include <stdbool.h> |
Jonas Ådahl | 61831f4 | 2016-03-15 18:14:00 +0800 | [diff] [blame] | 29 | #include <stdint.h> |
| 30 | #include <stdio.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <string.h> |
| 33 | #include <cairo.h> |
| 34 | #include <math.h> |
| 35 | #include <assert.h> |
| 36 | #include <sys/timerfd.h> |
| 37 | #include <sys/epoll.h> |
| 38 | #include <unistd.h> |
| 39 | |
| 40 | #include <linux/input.h> |
| 41 | #include <wayland-client.h> |
| 42 | |
| 43 | #include "window.h" |
| 44 | #include "shared/helpers.h" |
| 45 | #include "shared/xalloc.h" |
| 46 | |
| 47 | struct confine { |
| 48 | struct display *display; |
| 49 | struct window *window; |
| 50 | struct widget *widget; |
| 51 | |
| 52 | cairo_surface_t *buffer; |
| 53 | |
| 54 | struct { |
| 55 | int32_t x, y; |
| 56 | int32_t old_x, old_y; |
| 57 | } line; |
| 58 | |
| 59 | int reset; |
| 60 | |
| 61 | struct input *cursor_timeout_input; |
| 62 | int cursor_timeout_fd; |
| 63 | struct task cursor_timeout_task; |
Jonas Ådahl | fdeb2bb | 2014-11-26 17:47:29 +0800 | [diff] [blame^] | 64 | |
| 65 | bool pointer_confined; |
Jonas Ådahl | 61831f4 | 2016-03-15 18:14:00 +0800 | [diff] [blame] | 66 | }; |
| 67 | |
| 68 | static void |
| 69 | draw_line(struct confine *confine, cairo_t *cr, |
| 70 | struct rectangle *allocation) |
| 71 | { |
| 72 | cairo_t *bcr; |
| 73 | cairo_surface_t *tmp_buffer = NULL; |
| 74 | |
| 75 | if (confine->reset) { |
| 76 | tmp_buffer = confine->buffer; |
| 77 | confine->buffer = NULL; |
| 78 | confine->line.x = -1; |
| 79 | confine->line.y = -1; |
| 80 | confine->line.old_x = -1; |
| 81 | confine->line.old_y = -1; |
| 82 | confine->reset = 0; |
| 83 | } |
| 84 | |
| 85 | if (confine->buffer == NULL) { |
| 86 | confine->buffer = |
| 87 | cairo_image_surface_create(CAIRO_FORMAT_ARGB32, |
| 88 | allocation->width, |
| 89 | allocation->height); |
| 90 | bcr = cairo_create(confine->buffer); |
| 91 | cairo_set_source_rgba(bcr, 0, 0, 0, 0); |
| 92 | cairo_rectangle(bcr, |
| 93 | 0, 0, |
| 94 | allocation->width, allocation->height); |
| 95 | cairo_fill(bcr); |
| 96 | } |
| 97 | else |
| 98 | bcr = cairo_create(confine->buffer); |
| 99 | |
| 100 | if (tmp_buffer) { |
| 101 | cairo_set_source_surface(bcr, tmp_buffer, 0, 0); |
| 102 | cairo_rectangle(bcr, 0, 0, |
| 103 | allocation->width, allocation->height); |
| 104 | cairo_clip(bcr); |
| 105 | cairo_paint(bcr); |
| 106 | |
| 107 | cairo_surface_destroy(tmp_buffer); |
| 108 | } |
| 109 | |
| 110 | if (confine->line.x != -1 && confine->line.y != -1) { |
| 111 | if (confine->line.old_x != -1 && |
| 112 | confine->line.old_y != -1) { |
| 113 | cairo_set_line_width(bcr, 2.0); |
| 114 | cairo_set_source_rgb(bcr, 1, 1, 1); |
| 115 | cairo_translate(bcr, |
| 116 | -allocation->x, -allocation->y); |
| 117 | |
| 118 | cairo_move_to(bcr, |
| 119 | confine->line.old_x, |
| 120 | confine->line.old_y); |
| 121 | cairo_line_to(bcr, |
| 122 | confine->line.x, |
| 123 | confine->line.y); |
| 124 | |
| 125 | cairo_stroke(bcr); |
| 126 | } |
| 127 | |
| 128 | confine->line.old_x = confine->line.x; |
| 129 | confine->line.old_y = confine->line.y; |
| 130 | } |
| 131 | cairo_destroy(bcr); |
| 132 | |
| 133 | cairo_set_source_surface(cr, confine->buffer, |
| 134 | allocation->x, allocation->y); |
| 135 | cairo_set_operator(cr, CAIRO_OPERATOR_ADD); |
| 136 | cairo_rectangle(cr, |
| 137 | allocation->x, allocation->y, |
| 138 | allocation->width, allocation->height); |
| 139 | cairo_clip(cr); |
| 140 | cairo_paint(cr); |
| 141 | } |
| 142 | |
| 143 | static void |
| 144 | redraw_handler(struct widget *widget, void *data) |
| 145 | { |
| 146 | struct confine *confine = data; |
| 147 | cairo_surface_t *surface; |
| 148 | cairo_t *cr; |
| 149 | struct rectangle allocation; |
| 150 | |
| 151 | widget_get_allocation(confine->widget, &allocation); |
| 152 | |
| 153 | surface = window_get_surface(confine->window); |
| 154 | |
| 155 | cr = cairo_create(surface); |
| 156 | cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE); |
| 157 | cairo_rectangle(cr, |
| 158 | allocation.x, |
| 159 | allocation.y, |
| 160 | allocation.width, |
| 161 | allocation.height); |
| 162 | cairo_set_source_rgba(cr, 0, 0, 0, 0.8); |
| 163 | cairo_fill(cr); |
| 164 | |
| 165 | draw_line(confine, cr, &allocation); |
| 166 | |
| 167 | cairo_destroy(cr); |
| 168 | |
| 169 | cairo_surface_destroy(surface); |
| 170 | } |
| 171 | |
| 172 | static void |
| 173 | keyboard_focus_handler(struct window *window, |
| 174 | struct input *device, void *data) |
| 175 | { |
| 176 | struct confine *confine = data; |
| 177 | |
| 178 | window_schedule_redraw(confine->window); |
| 179 | } |
| 180 | |
| 181 | static void |
| 182 | key_handler(struct window *window, struct input *input, uint32_t time, |
| 183 | uint32_t key, uint32_t sym, |
| 184 | enum wl_keyboard_key_state state, void *data) |
| 185 | { |
| 186 | struct confine *confine = data; |
| 187 | |
| 188 | if (state == WL_KEYBOARD_KEY_STATE_RELEASED) |
| 189 | return; |
| 190 | |
| 191 | switch (sym) { |
| 192 | case XKB_KEY_Escape: |
| 193 | display_exit(confine->display); |
| 194 | break; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | static void |
Jonas Ådahl | fdeb2bb | 2014-11-26 17:47:29 +0800 | [diff] [blame^] | 199 | toggle_pointer_confine(struct confine *confine, struct input *input) |
| 200 | { |
| 201 | if (confine->pointer_confined) { |
| 202 | window_unconfine_pointer(confine->window); |
| 203 | } else { |
| 204 | window_confine_pointer_to_widget(confine->window, |
| 205 | confine->widget, |
| 206 | input); |
| 207 | } |
| 208 | |
| 209 | confine->pointer_confined = !confine->pointer_confined; |
| 210 | } |
| 211 | |
| 212 | static void |
| 213 | button_handler(struct widget *widget, |
| 214 | struct input *input, uint32_t time, |
| 215 | uint32_t button, |
| 216 | enum wl_pointer_button_state state, void *data) |
| 217 | { |
| 218 | struct confine *confine = data; |
| 219 | bool is_pressed = state == WL_POINTER_BUTTON_STATE_PRESSED; |
| 220 | |
| 221 | if (is_pressed && button == BTN_LEFT) |
| 222 | toggle_pointer_confine(confine, input); |
| 223 | widget_schedule_redraw(widget); |
| 224 | } |
| 225 | |
| 226 | static void |
Jonas Ådahl | 61831f4 | 2016-03-15 18:14:00 +0800 | [diff] [blame] | 227 | cursor_timeout_reset(struct confine *confine) |
| 228 | { |
| 229 | const long cursor_timeout = 500; |
| 230 | struct itimerspec its; |
| 231 | |
| 232 | its.it_interval.tv_sec = 0; |
| 233 | its.it_interval.tv_nsec = 0; |
| 234 | its.it_value.tv_sec = cursor_timeout / 1000; |
| 235 | its.it_value.tv_nsec = (cursor_timeout % 1000) * 1000 * 1000; |
| 236 | timerfd_settime(confine->cursor_timeout_fd, 0, &its, NULL); |
| 237 | } |
| 238 | |
| 239 | static int |
| 240 | motion_handler(struct widget *widget, |
| 241 | struct input *input, uint32_t time, |
| 242 | float x, float y, void *data) |
| 243 | { |
| 244 | struct confine *confine = data; |
| 245 | confine->line.x = x; |
| 246 | confine->line.y = y; |
| 247 | |
| 248 | window_schedule_redraw(confine->window); |
| 249 | |
| 250 | cursor_timeout_reset(confine); |
| 251 | confine->cursor_timeout_input = input; |
| 252 | |
| 253 | return CURSOR_BLANK; |
| 254 | } |
| 255 | |
| 256 | static void |
| 257 | resize_handler(struct widget *widget, |
| 258 | int32_t width, int32_t height, |
| 259 | void *data) |
| 260 | { |
| 261 | struct confine *confine = data; |
| 262 | |
| 263 | confine->reset = 1; |
| 264 | } |
| 265 | |
| 266 | static void |
| 267 | leave_handler(struct widget *widget, |
| 268 | struct input *input, void *data) |
| 269 | { |
| 270 | struct confine *confine = data; |
| 271 | |
| 272 | confine->reset = 1; |
| 273 | } |
| 274 | |
| 275 | static void |
| 276 | cursor_timeout_func(struct task *task, uint32_t events) |
| 277 | { |
| 278 | struct confine *confine = |
| 279 | container_of(task, struct confine, cursor_timeout_task); |
| 280 | uint64_t exp; |
| 281 | |
| 282 | if (read(confine->cursor_timeout_fd, &exp, sizeof (uint64_t)) != |
| 283 | sizeof(uint64_t)) |
| 284 | abort(); |
| 285 | |
| 286 | input_set_pointer_image(confine->cursor_timeout_input, |
| 287 | CURSOR_LEFT_PTR); |
| 288 | } |
| 289 | |
Jonas Ådahl | fdeb2bb | 2014-11-26 17:47:29 +0800 | [diff] [blame^] | 290 | static void |
| 291 | pointer_unconfined(struct window *window, struct input *input, void *data) |
| 292 | { |
| 293 | struct confine *confine = data; |
| 294 | |
| 295 | confine->pointer_confined = false; |
| 296 | } |
| 297 | |
Jonas Ådahl | 61831f4 | 2016-03-15 18:14:00 +0800 | [diff] [blame] | 298 | static struct confine * |
| 299 | confine_create(struct display *display) |
| 300 | { |
| 301 | struct confine *confine; |
| 302 | |
| 303 | confine = xzalloc(sizeof *confine); |
| 304 | confine->window = window_create(display); |
| 305 | confine->widget = window_frame_create(confine->window, confine); |
| 306 | window_set_title(confine->window, "Wayland Confine"); |
| 307 | confine->display = display; |
| 308 | confine->buffer = NULL; |
| 309 | |
| 310 | window_set_key_handler(confine->window, key_handler); |
| 311 | window_set_user_data(confine->window, confine); |
| 312 | window_set_keyboard_focus_handler(confine->window, |
| 313 | keyboard_focus_handler); |
Jonas Ådahl | fdeb2bb | 2014-11-26 17:47:29 +0800 | [diff] [blame^] | 314 | window_set_pointer_confined_handler(confine->window, |
| 315 | NULL, |
| 316 | pointer_unconfined); |
Jonas Ådahl | 61831f4 | 2016-03-15 18:14:00 +0800 | [diff] [blame] | 317 | |
| 318 | widget_set_redraw_handler(confine->widget, redraw_handler); |
Jonas Ådahl | fdeb2bb | 2014-11-26 17:47:29 +0800 | [diff] [blame^] | 319 | widget_set_button_handler(confine->widget, button_handler); |
Jonas Ådahl | 61831f4 | 2016-03-15 18:14:00 +0800 | [diff] [blame] | 320 | widget_set_motion_handler(confine->widget, motion_handler); |
| 321 | widget_set_resize_handler(confine->widget, resize_handler); |
| 322 | widget_set_leave_handler(confine->widget, leave_handler); |
| 323 | |
| 324 | widget_schedule_resize(confine->widget, 500, 400); |
| 325 | confine->line.x = -1; |
| 326 | confine->line.y = -1; |
| 327 | confine->line.old_x = -1; |
| 328 | confine->line.old_y = -1; |
| 329 | confine->reset = 0; |
| 330 | |
| 331 | confine->cursor_timeout_fd = |
| 332 | timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC); |
| 333 | confine->cursor_timeout_task.run = cursor_timeout_func; |
| 334 | display_watch_fd(window_get_display(confine->window), |
| 335 | confine->cursor_timeout_fd, |
| 336 | EPOLLIN, &confine->cursor_timeout_task); |
| 337 | |
| 338 | return confine; |
| 339 | } |
| 340 | |
| 341 | static void |
| 342 | confine_destroy(struct confine *confine) |
| 343 | { |
| 344 | display_unwatch_fd(window_get_display(confine->window), |
| 345 | confine->cursor_timeout_fd); |
| 346 | close(confine->cursor_timeout_fd); |
| 347 | if (confine->buffer) |
| 348 | cairo_surface_destroy(confine->buffer); |
| 349 | widget_destroy(confine->widget); |
| 350 | window_destroy(confine->window); |
| 351 | free(confine); |
| 352 | } |
| 353 | |
| 354 | int |
| 355 | main(int argc, char *argv[]) |
| 356 | { |
| 357 | struct display *display; |
| 358 | struct confine *confine; |
| 359 | |
| 360 | display = display_create(&argc, argv); |
| 361 | if (display == NULL) { |
| 362 | fprintf(stderr, "failed to create display: %m\n"); |
| 363 | return -1; |
| 364 | } |
| 365 | |
| 366 | confine = confine_create(display); |
| 367 | |
| 368 | display_run(display); |
| 369 | |
| 370 | confine_destroy(confine); |
| 371 | display_destroy(display); |
| 372 | |
| 373 | return 0; |
| 374 | } |