2 * vim:ts=4:sw=4:expandtab
4 * © 2010 Michael Stapelberg
6 * See LICENSE for licensing information
17 #include <cairo/cairo-xcb.h>
21 #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 extern bool debug_mode;
36 /* The current position in the input buffer. Useful to determine if any
37 * characters of the password have already been entered or not. */
40 /* The lock window. */
41 extern xcb_window_t win;
43 /* The current resolution of the X11 root window. */
44 extern uint32_t last_resolution[2];
46 /* Whether the unlock indicator is enabled (defaults to true). */
47 extern bool unlock_indicator;
49 /* List of pressed modifiers, or NULL if none are pressed. */
50 extern char *modifier_string;
52 /* A Cairo surface containing the specified image (-i), if any. */
53 extern cairo_surface_t *img;
55 /* Whether the image should be tiled. */
57 /* The background color to use (in hex). */
60 /* Whether the failed attempts should be displayed. */
61 extern bool show_failed_attempts;
62 /* Number of failed unlock attempts. */
63 extern int failed_attempts;
65 /*******************************************************************************
66 * Variables defined in xcb.c.
67 ******************************************************************************/
69 /* The root screen, to determine the DPI. */
70 extern xcb_screen_t *screen;
72 /*******************************************************************************
74 ******************************************************************************/
76 /* Cache the screen’s visual, necessary for creating a Cairo context. */
77 static xcb_visualtype_t *vistype;
79 /* Maintain the current unlock/PAM state to draw the appropriate unlock
81 unlock_state_t unlock_state;
82 auth_state_t auth_state;
85 * Draws global image with fill color onto a pixmap with the given
86 * resolution and returns it.
89 xcb_pixmap_t draw_image(uint32_t *resolution) {
90 xcb_pixmap_t bg_pixmap = XCB_NONE;
91 const double scaling_factor = get_dpi_value() / 96.0;
92 int button_diameter_physical = ceil(scaling_factor * BUTTON_DIAMETER);
93 DEBUG("scaling_factor is %.f, physical diameter is %d px\n",
94 scaling_factor, button_diameter_physical);
97 vistype = get_root_visual_type(screen);
98 bg_pixmap = create_bg_pixmap(conn, screen, resolution, color);
99 /* Initialize cairo: Create one in-memory surface to render the unlock
100 * indicator on, create one XCB surface to actually draw (one or more,
101 * depending on the amount of screens) unlock indicators on. */
102 cairo_surface_t *output = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, button_diameter_physical, button_diameter_physical);
103 cairo_t *ctx = cairo_create(output);
105 cairo_surface_t *xcb_output = cairo_xcb_surface_create(conn, bg_pixmap, vistype, resolution[0], resolution[1]);
106 cairo_t *xcb_ctx = cairo_create(xcb_output);
110 cairo_set_source_surface(xcb_ctx, img, 0, 0);
111 cairo_paint(xcb_ctx);
113 /* create a pattern and fill a rectangle as big as the screen */
114 cairo_pattern_t *pattern;
115 pattern = cairo_pattern_create_for_surface(img);
116 cairo_set_source(xcb_ctx, pattern);
117 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
118 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
120 cairo_pattern_destroy(pattern);
123 char strgroups[3][3] = {{color[0], color[1], '\0'},
124 {color[2], color[3], '\0'},
125 {color[4], color[5], '\0'}};
126 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
127 (strtol(strgroups[1], NULL, 16)),
128 (strtol(strgroups[2], NULL, 16))};
129 cairo_set_source_rgb(xcb_ctx, rgb16[0] / 255.0, rgb16[1] / 255.0, rgb16[2] / 255.0);
130 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
134 if (unlock_indicator &&
135 (unlock_state >= STATE_KEY_PRESSED || auth_state > STATE_AUTH_IDLE)) {
136 cairo_scale(ctx, scaling_factor, scaling_factor);
137 /* Draw a (centered) circle with transparent background. */
138 cairo_set_line_width(ctx, 10.0);
140 BUTTON_CENTER /* x */,
141 BUTTON_CENTER /* y */,
142 BUTTON_RADIUS /* radius */,
146 /* Use the appropriate color for the different PAM states
147 * (currently verifying, wrong password, or default) */
148 switch (auth_state) {
149 case STATE_AUTH_VERIFY:
150 case STATE_AUTH_LOCK:
151 cairo_set_source_rgba(ctx, 0, 114.0 / 255, 255.0 / 255, 0.75);
153 case STATE_AUTH_WRONG:
154 case STATE_I3LOCK_LOCK_FAILED:
155 cairo_set_source_rgba(ctx, 250.0 / 255, 0, 0, 0.75);
158 if (unlock_state == STATE_NOTHING_TO_DELETE) {
159 cairo_set_source_rgba(ctx, 250.0 / 255, 0, 0, 0.75);
162 cairo_set_source_rgba(ctx, 0, 0, 0, 0.75);
165 cairo_fill_preserve(ctx);
167 switch (auth_state) {
168 case STATE_AUTH_VERIFY:
169 case STATE_AUTH_LOCK:
170 cairo_set_source_rgb(ctx, 51.0 / 255, 0, 250.0 / 255);
172 case STATE_AUTH_WRONG:
173 case STATE_I3LOCK_LOCK_FAILED:
174 cairo_set_source_rgb(ctx, 125.0 / 255, 51.0 / 255, 0);
176 case STATE_AUTH_IDLE:
177 if (unlock_state == STATE_NOTHING_TO_DELETE) {
178 cairo_set_source_rgb(ctx, 125.0 / 255, 51.0 / 255, 0);
182 cairo_set_source_rgb(ctx, 51.0 / 255, 125.0 / 255, 0);
187 /* Draw an inner seperator line. */
188 cairo_set_source_rgb(ctx, 0, 0, 0);
189 cairo_set_line_width(ctx, 2.0);
191 BUTTON_CENTER /* x */,
192 BUTTON_CENTER /* y */,
193 BUTTON_RADIUS - 5 /* radius */,
198 cairo_set_line_width(ctx, 10.0);
200 /* Display a (centered) text of the current PAM state. */
202 /* We don't want to show more than a 3-digit number. */
205 cairo_set_source_rgb(ctx, 0, 0, 0);
206 cairo_select_font_face(ctx, "sans-serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
207 cairo_set_font_size(ctx, 28.0);
208 switch (auth_state) {
209 case STATE_AUTH_VERIFY:
212 case STATE_AUTH_LOCK:
215 case STATE_AUTH_WRONG:
218 case STATE_I3LOCK_LOCK_FAILED:
219 text = "lock failed!";
222 if (unlock_state == STATE_NOTHING_TO_DELETE) {
225 if (show_failed_attempts && failed_attempts > 0) {
226 if (failed_attempts > 999) {
229 snprintf(buf, sizeof(buf), "%d", failed_attempts);
232 cairo_set_source_rgb(ctx, 1, 0, 0);
233 cairo_set_font_size(ctx, 32.0);
239 cairo_text_extents_t extents;
242 cairo_text_extents(ctx, text, &extents);
243 x = BUTTON_CENTER - ((extents.width / 2) + extents.x_bearing);
244 y = BUTTON_CENTER - ((extents.height / 2) + extents.y_bearing);
246 cairo_move_to(ctx, x, y);
247 cairo_show_text(ctx, text);
248 cairo_close_path(ctx);
251 if (auth_state == STATE_AUTH_WRONG && (modifier_string != NULL)) {
252 cairo_text_extents_t extents;
255 cairo_set_font_size(ctx, 14.0);
257 cairo_text_extents(ctx, modifier_string, &extents);
258 x = BUTTON_CENTER - ((extents.width / 2) + extents.x_bearing);
259 y = BUTTON_CENTER - ((extents.height / 2) + extents.y_bearing) + 28.0;
261 cairo_move_to(ctx, x, y);
262 cairo_show_text(ctx, modifier_string);
263 cairo_close_path(ctx);
266 /* After the user pressed any valid key or the backspace key, we
267 * highlight a random part of the unlock indicator to confirm this
269 if (unlock_state == STATE_KEY_ACTIVE ||
270 unlock_state == STATE_BACKSPACE_ACTIVE) {
271 cairo_new_sub_path(ctx);
272 double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0;
274 BUTTON_CENTER /* x */,
275 BUTTON_CENTER /* y */,
276 BUTTON_RADIUS /* radius */,
278 highlight_start + (M_PI / 3.0));
279 if (unlock_state == STATE_KEY_ACTIVE) {
280 /* For normal keys, we use a lighter green. */
281 cairo_set_source_rgb(ctx, 51.0 / 255, 219.0 / 255, 0);
283 /* For backspace, we use red. */
284 cairo_set_source_rgb(ctx, 219.0 / 255, 51.0 / 255, 0);
288 /* Draw two little separators for the highlighted part of the
289 * unlock indicator. */
290 cairo_set_source_rgb(ctx, 0, 0, 0);
292 BUTTON_CENTER /* x */,
293 BUTTON_CENTER /* y */,
294 BUTTON_RADIUS /* radius */,
295 highlight_start /* start */,
296 highlight_start + (M_PI / 128.0) /* end */);
299 BUTTON_CENTER /* x */,
300 BUTTON_CENTER /* y */,
301 BUTTON_RADIUS /* radius */,
302 (highlight_start + (M_PI / 3.0)) - (M_PI / 128.0) /* start */,
303 highlight_start + (M_PI / 3.0) /* end */);
308 if (xr_screens > 0) {
309 /* Composite the unlock indicator in the middle of each screen. */
310 for (int screen = 0; screen < xr_screens; screen++) {
311 int x = (xr_resolutions[screen].x + ((xr_resolutions[screen].width / 2) - (button_diameter_physical / 2)));
312 int y = (xr_resolutions[screen].y + ((xr_resolutions[screen].height / 2) - (button_diameter_physical / 2)));
313 cairo_set_source_surface(xcb_ctx, output, x, y);
314 cairo_rectangle(xcb_ctx, x, y, button_diameter_physical, button_diameter_physical);
318 /* We have no information about the screen sizes/positions, so we just
319 * place the unlock indicator in the middle of the X root window and
320 * hope for the best. */
321 int x = (last_resolution[0] / 2) - (button_diameter_physical / 2);
322 int y = (last_resolution[1] / 2) - (button_diameter_physical / 2);
323 cairo_set_source_surface(xcb_ctx, output, x, y);
324 cairo_rectangle(xcb_ctx, x, y, button_diameter_physical, button_diameter_physical);
328 cairo_surface_destroy(xcb_output);
329 cairo_surface_destroy(output);
331 cairo_destroy(xcb_ctx);
336 * Calls draw_image on a new pixmap and swaps that with the current pixmap
339 void redraw_screen(void) {
340 DEBUG("redraw_screen(unlock_state = %d, auth_state = %d)\n", unlock_state, auth_state);
341 xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
342 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){bg_pixmap});
343 /* XXX: Possible optimization: Only update the area in the middle of the
344 * screen instead of the whole screen. */
345 xcb_clear_area(conn, 0, win, 0, 0, last_resolution[0], last_resolution[1]);
346 xcb_free_pixmap(conn, bg_pixmap);
351 * Hides the unlock indicator completely when there is no content in the
355 void clear_indicator(void) {
356 if (input_position == 0) {
357 unlock_state = STATE_STARTED;
359 unlock_state = STATE_KEY_PRESSED;