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 lock window. */
35 extern xcb_window_t win;
37 /* The current resolution of the X11 root window. */
38 extern uint32_t last_resolution[2];
40 /* Whether the unlock indicator is enabled (defaults to true). */
41 extern bool unlock_indicator;
43 /* A Cairo surface containing the specified image (-i), if any. */
44 extern cairo_surface_t *img;
46 /* Whether the image should be tiled. */
48 /* The background color to use (in hex). */
51 /*******************************************************************************
53 ******************************************************************************/
55 /* Cache the screen’s visual, necessary for creating a Cairo context. */
56 static xcb_visualtype_t *vistype;
58 /* Maintain the current unlock/PAM state to draw the appropriate unlock
60 unlock_state_t unlock_state;
61 pam_state_t pam_state;
64 * Draws global image with fill color onto a pixmap with the given
65 * resolution and returns it.
68 xcb_pixmap_t draw_image(uint32_t *resolution) {
69 xcb_pixmap_t bg_pixmap = XCB_NONE;
72 vistype = get_root_visual_type(screen);
73 bg_pixmap = create_bg_pixmap(conn, screen, resolution, color);
74 /* Initialize cairo: Create one in-memory surface to render the unlock
75 * indicator on, create one XCB surface to actually draw (one or more,
76 * depending on the amount of screens) unlock indicators on. */
77 cairo_surface_t *output = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, BUTTON_DIAMETER, BUTTON_DIAMETER);
78 cairo_t *ctx = cairo_create(output);
80 cairo_surface_t *xcb_output = cairo_xcb_surface_create(conn, bg_pixmap, vistype, resolution[0], resolution[1]);
81 cairo_t *xcb_ctx = cairo_create(xcb_output);
85 cairo_set_source_surface(xcb_ctx, img, 0, 0);
88 /* create a pattern and fill a rectangle as big as the screen */
89 cairo_pattern_t *pattern;
90 pattern = cairo_pattern_create_for_surface(img);
91 cairo_set_source(xcb_ctx, pattern);
92 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
93 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
95 cairo_pattern_destroy(pattern);
98 char strgroups[3][3] = {{color[0], color[1], '\0'},
99 {color[2], color[3], '\0'},
100 {color[4], color[5], '\0'}};
101 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
102 (strtol(strgroups[1], NULL, 16)),
103 (strtol(strgroups[2], NULL, 16))};
104 cairo_set_source_rgb(xcb_ctx, rgb16[0] / 255.0, rgb16[1] / 255.0, rgb16[2] / 255.0);
105 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
109 if (unlock_state >= STATE_KEY_PRESSED && unlock_indicator) {
110 /* Draw a (centered) circle with transparent background. */
111 cairo_set_line_width(ctx, 10.0);
113 BUTTON_CENTER /* x */,
114 BUTTON_CENTER /* y */,
115 BUTTON_RADIUS /* radius */,
119 /* Use the appropriate color for the different PAM states
120 * (currently verifying, wrong password, or default) */
122 case STATE_PAM_VERIFY:
123 cairo_set_source_rgba(ctx, 0, 114.0/255, 255.0/255, 0.75);
125 case STATE_PAM_WRONG:
126 cairo_set_source_rgba(ctx, 250.0/255, 0, 0, 0.75);
129 cairo_set_source_rgba(ctx, 0, 0, 0, 0.75);
132 cairo_fill_preserve(ctx);
135 case STATE_PAM_VERIFY:
136 cairo_set_source_rgb(ctx, 51.0/255, 0, 250.0/255);
138 case STATE_PAM_WRONG:
139 cairo_set_source_rgb(ctx, 125.0/255, 51.0/255, 0);
142 cairo_set_source_rgb(ctx, 51.0/255, 125.0/255, 0);
147 /* Draw an inner seperator line. */
148 cairo_set_source_rgb(ctx, 0, 0, 0);
149 cairo_set_line_width(ctx, 2.0);
151 BUTTON_CENTER /* x */,
152 BUTTON_CENTER /* y */,
153 BUTTON_RADIUS - 5 /* radius */,
158 cairo_set_line_width(ctx, 10.0);
160 /* Display a (centered) text of the current PAM state. */
163 case STATE_PAM_VERIFY:
166 case STATE_PAM_WRONG:
174 cairo_text_extents_t extents;
177 cairo_set_source_rgb(ctx, 0, 0, 0);
178 cairo_set_font_size(ctx, 28.0);
180 cairo_text_extents(ctx, text, &extents);
181 x = BUTTON_CENTER - ((extents.width / 2) + extents.x_bearing);
182 y = BUTTON_CENTER - ((extents.height / 2) + extents.y_bearing);
184 cairo_move_to(ctx, x, y);
185 cairo_show_text(ctx, text);
186 cairo_close_path(ctx);
189 /* After the user pressed any valid key or the backspace key, we
190 * highlight a random part of the unlock indicator to confirm this
192 if (unlock_state == STATE_KEY_ACTIVE ||
193 unlock_state == STATE_BACKSPACE_ACTIVE) {
194 cairo_new_sub_path(ctx);
195 double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0;
197 BUTTON_CENTER /* x */,
198 BUTTON_CENTER /* y */,
199 BUTTON_RADIUS /* radius */,
201 highlight_start + (M_PI / 3.0));
202 if (unlock_state == STATE_KEY_ACTIVE) {
203 /* For normal keys, we use a lighter green. */
204 cairo_set_source_rgb(ctx, 51.0/255, 219.0/255, 0);
206 /* For backspace, we use red. */
207 cairo_set_source_rgb(ctx, 219.0/255, 51.0/255, 0);
211 /* Draw two little separators for the highlighted part of the
212 * unlock indicator. */
213 cairo_set_source_rgb(ctx, 0, 0, 0);
215 BUTTON_CENTER /* x */,
216 BUTTON_CENTER /* y */,
217 BUTTON_RADIUS /* radius */,
218 highlight_start /* start */,
219 highlight_start + (M_PI / 128.0) /* end */);
222 BUTTON_CENTER /* x */,
223 BUTTON_CENTER /* y */,
224 BUTTON_RADIUS /* radius */,
225 highlight_start + (M_PI / 3.0) /* start */,
226 (highlight_start + (M_PI / 3.0)) + (M_PI / 128.0) /* end */);
231 if (xr_screens > 0) {
232 /* Composite the unlock indicator in the middle of each screen. */
233 for (int screen = 0; screen < xr_screens; screen++) {
234 int x = (xr_resolutions[screen].x + ((xr_resolutions[screen].width / 2) - (BUTTON_DIAMETER / 2)));
235 int y = (xr_resolutions[screen].y + ((xr_resolutions[screen].height / 2) - (BUTTON_DIAMETER / 2)));
236 cairo_set_source_surface(xcb_ctx, output, x, y);
237 cairo_rectangle(xcb_ctx, x, y, BUTTON_DIAMETER, BUTTON_DIAMETER);
241 /* We have no information about the screen sizes/positions, so we just
242 * place the unlock indicator in the middle of the X root window and
243 * hope for the best. */
244 int x = (last_resolution[0] / 2) - (BUTTON_DIAMETER / 2);
245 int y = (last_resolution[1] / 2) - (BUTTON_DIAMETER / 2);
246 cairo_set_source_surface(xcb_ctx, output, x, y);
247 cairo_rectangle(xcb_ctx, x, y, BUTTON_DIAMETER, BUTTON_DIAMETER);
251 cairo_surface_destroy(xcb_output);
252 cairo_surface_destroy(output);
254 cairo_destroy(xcb_ctx);
259 * Calls draw_image on a new pixmap and swaps that with the current pixmap
262 void redraw_screen(void) {
263 xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
264 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap });
265 /* XXX: Possible optimization: Only update the area in the middle of the
266 * screen instead of the whole screen. */
267 xcb_clear_area(conn, 0, win, 0, 0, last_resolution[0], last_resolution[1]);
268 xcb_free_pixmap(conn, bg_pixmap);
273 * Hides the unlock indicator completely when there is no content in the
277 void clear_indicator(void) {
278 if (input_position == 0) {
279 unlock_state = STATE_STARTED;
280 } else unlock_state = STATE_KEY_PRESSED;