2 * vim:ts=4:sw=4:expandtab
4 * © 2010-2012 Michael Stapelberg
6 * See LICENSE for licensing information
13 #include <xcb/xcb_keysyms.h>
18 #include <cairo/cairo-xcb.h>
22 #include "unlock_indicator.h"
25 #define BUTTON_RADIUS 90
26 #define BUTTON_SPACE (BUTTON_RADIUS + 5)
27 #define BUTTON_CENTER (BUTTON_RADIUS + 5)
28 #define BUTTON_DIAMETER (2 * BUTTON_SPACE)
30 /*******************************************************************************
31 * Variables defined in i3lock.c.
32 ******************************************************************************/
34 /* The current position in the input buffer. Useful to determine if any
35 * characters of the password have already been entered or not. */
38 /* The ev main loop. */
39 struct ev_loop *main_loop;
41 /* The lock window. */
42 extern xcb_window_t win;
44 /* The current resolution of the X11 root window. */
45 extern uint32_t last_resolution[2];
47 /* Whether the unlock indicator is enabled (defaults to true). */
48 extern bool unlock_indicator;
50 /* A Cairo surface containing the specified image (-i), if any. */
51 extern cairo_surface_t *img;
52 /* Whether the image should be tiled. */
54 /* The background color to use (in hex). */
57 /*******************************************************************************
59 ******************************************************************************/
61 static struct ev_timer *clear_indicator_timeout;
63 /* Cache the screen’s visual, necessary for creating a Cairo context. */
64 static xcb_visualtype_t *vistype;
66 /* Maintain the current unlock/PAM state to draw the appropriate unlock
68 unlock_state_t unlock_state;
69 pam_state_t pam_state;
72 * Draws global image with fill color onto a pixmap with the given
73 * resolution and returns it.
76 xcb_pixmap_t draw_image(uint32_t *resolution) {
77 xcb_pixmap_t bg_pixmap = XCB_NONE;
81 vistype = get_root_visual_type(screen);
82 bg_pixmap = create_bg_pixmap(conn, screen, resolution, color);
83 /* Initialize cairo: Create one in-memory surface to render the unlock
84 * indicator on, create one XCB surface to actually draw (one or more,
85 * depending on the amount of screens) unlock indicators on. */
86 cairo_surface_t *output = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, BUTTON_DIAMETER, BUTTON_DIAMETER);
87 cairo_t *ctx = cairo_create(output);
89 cairo_surface_t *xcb_output = cairo_xcb_surface_create(conn, bg_pixmap, vistype, resolution[0], resolution[1]);
90 cairo_t *xcb_ctx = cairo_create(xcb_output);
94 cairo_set_source_surface(xcb_ctx, img, 0, 0);
97 /* create a pattern and fill a rectangle as big as the screen */
98 cairo_pattern_t *pattern;
99 pattern = cairo_pattern_create_for_surface(img);
100 cairo_set_source(xcb_ctx, pattern);
101 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
102 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
104 cairo_pattern_destroy(pattern);
107 char strgroups[3][3] = {{color[0], color[1], '\0'},
108 {color[2], color[3], '\0'},
109 {color[4], color[5], '\0'}};
110 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
111 (strtol(strgroups[1], NULL, 16)),
112 (strtol(strgroups[2], NULL, 16))};
113 cairo_set_source_rgb(xcb_ctx, rgb16[0], rgb16[1], rgb16[2]);
114 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
118 if (unlock_state >= STATE_KEY_PRESSED && unlock_indicator) {
119 /* Draw a (centered) circle with transparent background. */
120 cairo_set_line_width(ctx, 10.0);
122 BUTTON_CENTER /* x */,
123 BUTTON_CENTER /* y */,
124 BUTTON_RADIUS /* radius */,
128 /* Use the appropriate color for the different PAM states
129 * (currently verifying, wrong password, or default) */
131 case STATE_PAM_VERIFY:
132 cairo_set_source_rgba(ctx, 0, 114.0/255, 255.0/255, 0.75);
134 case STATE_PAM_WRONG:
135 cairo_set_source_rgba(ctx, 250.0/255, 0, 0, 0.75);
138 cairo_set_source_rgba(ctx, 0, 0, 0, 0.75);
141 cairo_fill_preserve(ctx);
144 case STATE_PAM_VERIFY:
145 cairo_set_source_rgb(ctx, 51.0/255, 0, 250.0/255);
147 case STATE_PAM_WRONG:
148 cairo_set_source_rgb(ctx, 125.0/255, 51.0/255, 0);
151 cairo_set_source_rgb(ctx, 51.0/255, 125.0/255, 0);
156 /* Draw an inner seperator line. */
157 cairo_set_source_rgb(ctx, 0, 0, 0);
158 cairo_set_line_width(ctx, 2.0);
160 BUTTON_CENTER /* x */,
161 BUTTON_CENTER /* y */,
162 BUTTON_RADIUS - 5 /* radius */,
167 cairo_set_line_width(ctx, 10.0);
169 /* Display a (centered) text of the current PAM state. */
172 case STATE_PAM_VERIFY:
175 case STATE_PAM_WRONG:
183 cairo_text_extents_t extents;
186 cairo_set_source_rgb(ctx, 0, 0, 0);
187 cairo_set_font_size(ctx, 28.0);
189 cairo_text_extents(ctx, text, &extents);
190 x = BUTTON_CENTER - ((extents.width / 2) + extents.x_bearing);
191 y = BUTTON_CENTER - ((extents.height / 2) + extents.y_bearing);
193 cairo_move_to(ctx, x, y);
194 cairo_show_text(ctx, text);
195 cairo_close_path(ctx);
198 /* After the user pressed any valid key or the backspace key, we
199 * highlight a random part of the unlock indicator to confirm this
201 if (unlock_state == STATE_KEY_ACTIVE ||
202 unlock_state == STATE_BACKSPACE_ACTIVE) {
203 cairo_new_sub_path(ctx);
204 double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0;
206 BUTTON_CENTER /* x */,
207 BUTTON_CENTER /* y */,
208 BUTTON_RADIUS /* radius */,
210 highlight_start + (M_PI / 3.0));
211 if (unlock_state == STATE_KEY_ACTIVE) {
212 /* For normal keys, we use a lighter green. */
213 cairo_set_source_rgb(ctx, 51.0/255, 219.0/255, 0);
215 /* For backspace, we use red. */
216 cairo_set_source_rgb(ctx, 219.0/255, 51.0/255, 0);
220 /* Draw two little separators for the highlighted part of the
221 * unlock indicator. */
222 cairo_set_source_rgb(ctx, 0, 0, 0);
224 BUTTON_CENTER /* x */,
225 BUTTON_CENTER /* y */,
226 BUTTON_RADIUS /* radius */,
227 highlight_start /* start */,
228 highlight_start + (M_PI / 128.0) /* end */);
231 BUTTON_CENTER /* x */,
232 BUTTON_CENTER /* y */,
233 BUTTON_RADIUS /* radius */,
234 highlight_start + (M_PI / 3.0) /* start */,
235 (highlight_start + (M_PI / 3.0)) + (M_PI / 128.0) /* end */);
240 if (xr_screens > 0) {
241 /* Composite the unlock indicator in the middle of each screen. */
242 for (int screen = 0; screen < xr_screens; screen++) {
243 int x = (xr_resolutions[screen].x + ((xr_resolutions[screen].width / 2) - (BUTTON_DIAMETER / 2)));
244 int y = (xr_resolutions[screen].y + ((xr_resolutions[screen].height / 2) - (BUTTON_DIAMETER / 2)));
245 cairo_set_source_surface(xcb_ctx, output, x, y);
246 cairo_rectangle(xcb_ctx, x, y, BUTTON_DIAMETER, BUTTON_DIAMETER);
250 /* We have no information about the screen sizes/positions, so we just
251 * place the unlock indicator in the middle of the X root window and
252 * hope for the best. */
253 int x = (last_resolution[0] / 2);
254 int y = (last_resolution[1] / 2);
255 cairo_set_source_surface(xcb_ctx, output, x, y);
256 cairo_rectangle(xcb_ctx, x, y, BUTTON_DIAMETER, BUTTON_DIAMETER);
260 cairo_surface_destroy(xcb_output);
261 cairo_surface_destroy(output);
263 cairo_destroy(xcb_ctx);
269 * Calls draw_image on a new pixmap and swaps that with the current pixmap
272 void redraw_screen() {
273 xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
274 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap });
275 /* XXX: Possible optimization: Only update the area in the middle of the
276 * screen instead of the whole screen. */
277 xcb_clear_area(conn, 0, win, 0, 0, screen->width_in_pixels, screen->height_in_pixels);
278 xcb_free_pixmap(conn, bg_pixmap);
283 * Hides the unlock indicator completely when there is no content in the
287 static void clear_indicator(EV_P_ ev_timer *w, int revents) {
288 if (input_position == 0) {
289 unlock_state = STATE_STARTED;
290 } else unlock_state = STATE_KEY_PRESSED;
293 ev_timer_stop(main_loop, clear_indicator_timeout);
294 free(clear_indicator_timeout);
295 clear_indicator_timeout = NULL;
299 * (Re-)starts the clear_indicator timeout. Called after pressing backspace or
300 * after an unsuccessful authentication attempt.
303 void start_clear_indicator_timeout() {
304 if (clear_indicator_timeout) {
305 ev_timer_stop(main_loop, clear_indicator_timeout);
306 ev_timer_set(clear_indicator_timeout, 1.0, 0.);
307 ev_timer_start(main_loop, clear_indicator_timeout);
309 /* When there is no memory, we just don’t have a timeout. We cannot
310 * exit() here, since that would effectively unlock the screen. */
311 if (!(clear_indicator_timeout = calloc(sizeof(struct ev_timer), 1)))
313 ev_timer_init(clear_indicator_timeout, clear_indicator, 1.0, 0.);
314 ev_timer_start(main_loop, clear_indicator_timeout);
319 * Stops the clear_indicator timeout.
322 void stop_clear_indicator_timeout() {
323 if (clear_indicator_timeout) {
324 ev_timer_stop(main_loop, clear_indicator_timeout);
325 free(clear_indicator_timeout);
326 clear_indicator_timeout = NULL;