2 * vim:ts=4:sw=4:expandtab
4 * © 2010-2012 Michael Stapelberg
6 * See LICENSE for licensing information
15 #include <cairo/cairo-xcb.h>
18 #include "unlock_indicator.h"
21 #define BUTTON_RADIUS 90
22 #define BUTTON_SPACE (BUTTON_RADIUS + 5)
23 #define BUTTON_CENTER (BUTTON_RADIUS + 5)
24 #define BUTTON_DIAMETER (2 * BUTTON_SPACE)
26 /*******************************************************************************
27 * Variables defined in i3lock.c.
28 ******************************************************************************/
30 /* The current position in the input buffer. Useful to determine if any
31 * characters of the password have already been entered or not. */
34 /* The ev main loop. */
35 struct ev_loop *main_loop;
37 /* The lock window. */
38 extern xcb_window_t win;
40 /* The current resolution of the X11 root window. */
41 extern uint32_t last_resolution[2];
43 /* Whether the unlock indicator is enabled (defaults to true). */
44 extern bool unlock_indicator;
46 /* A Cairo surface containing the specified image (-i), if any. */
47 extern cairo_surface_t *img;
49 /* Whether the image should be tiled. */
51 /* The background color to use (in hex). */
54 /*******************************************************************************
56 ******************************************************************************/
58 static struct ev_timer *clear_indicator_timeout;
60 /* Cache the screen’s visual, necessary for creating a Cairo context. */
61 static xcb_visualtype_t *vistype;
63 /* Maintain the current unlock/PAM state to draw the appropriate unlock
65 unlock_state_t unlock_state;
66 pam_state_t pam_state;
69 * Draws global image with fill color onto a pixmap with the given
70 * resolution and returns it.
73 xcb_pixmap_t draw_image(uint32_t *resolution) {
74 xcb_pixmap_t bg_pixmap = XCB_NONE;
77 vistype = get_root_visual_type(screen);
78 bg_pixmap = create_bg_pixmap(conn, screen, resolution, color);
79 /* Initialize cairo: Create one in-memory surface to render the unlock
80 * indicator on, create one XCB surface to actually draw (one or more,
81 * depending on the amount of screens) unlock indicators on. */
82 cairo_surface_t *output = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, BUTTON_DIAMETER, BUTTON_DIAMETER);
83 cairo_t *ctx = cairo_create(output);
85 cairo_surface_t *xcb_output = cairo_xcb_surface_create(conn, bg_pixmap, vistype, resolution[0], resolution[1]);
86 cairo_t *xcb_ctx = cairo_create(xcb_output);
90 cairo_set_source_surface(xcb_ctx, img, 0, 0);
93 /* create a pattern and fill a rectangle as big as the screen */
94 cairo_pattern_t *pattern;
95 pattern = cairo_pattern_create_for_surface(img);
96 cairo_set_source(xcb_ctx, pattern);
97 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
98 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
100 cairo_pattern_destroy(pattern);
103 char strgroups[3][3] = {{color[0], color[1], '\0'},
104 {color[2], color[3], '\0'},
105 {color[4], color[5], '\0'}};
106 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
107 (strtol(strgroups[1], NULL, 16)),
108 (strtol(strgroups[2], NULL, 16))};
109 cairo_set_source_rgb(xcb_ctx, rgb16[0] / 255.0, rgb16[1] / 255.0, rgb16[2] / 255.0);
110 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
114 if (unlock_state >= STATE_KEY_PRESSED && unlock_indicator) {
115 /* Draw a (centered) circle with transparent background. */
116 cairo_set_line_width(ctx, 10.0);
118 BUTTON_CENTER /* x */,
119 BUTTON_CENTER /* y */,
120 BUTTON_RADIUS /* radius */,
124 /* Use the appropriate color for the different PAM states
125 * (currently verifying, wrong password, or default) */
127 case STATE_PAM_VERIFY:
128 cairo_set_source_rgba(ctx, 0, 114.0/255, 255.0/255, 0.75);
130 case STATE_PAM_WRONG:
131 cairo_set_source_rgba(ctx, 250.0/255, 0, 0, 0.75);
134 cairo_set_source_rgba(ctx, 0, 0, 0, 0.75);
137 cairo_fill_preserve(ctx);
140 case STATE_PAM_VERIFY:
141 cairo_set_source_rgb(ctx, 51.0/255, 0, 250.0/255);
143 case STATE_PAM_WRONG:
144 cairo_set_source_rgb(ctx, 125.0/255, 51.0/255, 0);
147 cairo_set_source_rgb(ctx, 51.0/255, 125.0/255, 0);
152 /* Draw an inner seperator line. */
153 cairo_set_source_rgb(ctx, 0, 0, 0);
154 cairo_set_line_width(ctx, 2.0);
156 BUTTON_CENTER /* x */,
157 BUTTON_CENTER /* y */,
158 BUTTON_RADIUS - 5 /* radius */,
163 cairo_set_line_width(ctx, 10.0);
165 /* Display a (centered) text of the current PAM state. */
168 case STATE_PAM_VERIFY:
171 case STATE_PAM_WRONG:
179 cairo_text_extents_t extents;
182 cairo_set_source_rgb(ctx, 0, 0, 0);
183 cairo_set_font_size(ctx, 28.0);
185 cairo_text_extents(ctx, text, &extents);
186 x = BUTTON_CENTER - ((extents.width / 2) + extents.x_bearing);
187 y = BUTTON_CENTER - ((extents.height / 2) + extents.y_bearing);
189 cairo_move_to(ctx, x, y);
190 cairo_show_text(ctx, text);
191 cairo_close_path(ctx);
194 /* After the user pressed any valid key or the backspace key, we
195 * highlight a random part of the unlock indicator to confirm this
197 if (unlock_state == STATE_KEY_ACTIVE ||
198 unlock_state == STATE_BACKSPACE_ACTIVE) {
199 cairo_new_sub_path(ctx);
200 double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0;
202 BUTTON_CENTER /* x */,
203 BUTTON_CENTER /* y */,
204 BUTTON_RADIUS /* radius */,
206 highlight_start + (M_PI / 3.0));
207 if (unlock_state == STATE_KEY_ACTIVE) {
208 /* For normal keys, we use a lighter green. */
209 cairo_set_source_rgb(ctx, 51.0/255, 219.0/255, 0);
211 /* For backspace, we use red. */
212 cairo_set_source_rgb(ctx, 219.0/255, 51.0/255, 0);
216 /* Draw two little separators for the highlighted part of the
217 * unlock indicator. */
218 cairo_set_source_rgb(ctx, 0, 0, 0);
220 BUTTON_CENTER /* x */,
221 BUTTON_CENTER /* y */,
222 BUTTON_RADIUS /* radius */,
223 highlight_start /* start */,
224 highlight_start + (M_PI / 128.0) /* end */);
227 BUTTON_CENTER /* x */,
228 BUTTON_CENTER /* y */,
229 BUTTON_RADIUS /* radius */,
230 highlight_start + (M_PI / 3.0) /* start */,
231 (highlight_start + (M_PI / 3.0)) + (M_PI / 128.0) /* end */);
236 if (xr_screens > 0) {
237 /* Composite the unlock indicator in the middle of each screen. */
238 for (int screen = 0; screen < xr_screens; screen++) {
239 int x = (xr_resolutions[screen].x + ((xr_resolutions[screen].width / 2) - (BUTTON_DIAMETER / 2)));
240 int y = (xr_resolutions[screen].y + ((xr_resolutions[screen].height / 2) - (BUTTON_DIAMETER / 2)));
241 cairo_set_source_surface(xcb_ctx, output, x, y);
242 cairo_rectangle(xcb_ctx, x, y, BUTTON_DIAMETER, BUTTON_DIAMETER);
246 /* We have no information about the screen sizes/positions, so we just
247 * place the unlock indicator in the middle of the X root window and
248 * hope for the best. */
249 int x = (last_resolution[0] / 2);
250 int y = (last_resolution[1] / 2);
251 cairo_set_source_surface(xcb_ctx, output, x, y);
252 cairo_rectangle(xcb_ctx, x, y, BUTTON_DIAMETER, BUTTON_DIAMETER);
256 cairo_surface_destroy(xcb_output);
257 cairo_surface_destroy(output);
259 cairo_destroy(xcb_ctx);
264 * Calls draw_image on a new pixmap and swaps that with the current pixmap
267 void redraw_screen(void) {
268 xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
269 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap });
270 /* XXX: Possible optimization: Only update the area in the middle of the
271 * screen instead of the whole screen. */
272 xcb_clear_area(conn, 0, win, 0, 0, last_resolution[0], last_resolution[1]);
273 xcb_free_pixmap(conn, bg_pixmap);
278 * Hides the unlock indicator completely when there is no content in the
282 static void clear_indicator(EV_P_ ev_timer *w, int revents) {
283 if (input_position == 0) {
284 unlock_state = STATE_STARTED;
285 } else unlock_state = STATE_KEY_PRESSED;
288 ev_timer_stop(main_loop, clear_indicator_timeout);
289 free(clear_indicator_timeout);
290 clear_indicator_timeout = NULL;
294 * (Re-)starts the clear_indicator timeout. Called after pressing backspace or
295 * after an unsuccessful authentication attempt.
298 void start_clear_indicator_timeout(void) {
299 if (clear_indicator_timeout) {
300 ev_timer_stop(main_loop, clear_indicator_timeout);
301 ev_timer_set(clear_indicator_timeout, 1.0, 0.);
302 ev_timer_start(main_loop, clear_indicator_timeout);
304 /* When there is no memory, we just don’t have a timeout. We cannot
305 * exit() here, since that would effectively unlock the screen. */
306 if (!(clear_indicator_timeout = calloc(sizeof(struct ev_timer), 1)))
308 ev_timer_init(clear_indicator_timeout, clear_indicator, 1.0, 0.);
309 ev_timer_start(main_loop, clear_indicator_timeout);
314 * Stops the clear_indicator timeout.
317 void stop_clear_indicator_timeout(void) {
318 if (clear_indicator_timeout) {
319 ev_timer_stop(main_loop, clear_indicator_timeout);
320 free(clear_indicator_timeout);
321 clear_indicator_timeout = NULL;