/* * vim:ts=4:sw=4:expandtab * * © 2010-2012 Michael Stapelberg * * See LICENSE for licensing information * */ #include #include #include #include #include #include #ifndef NOLIBCAIRO #include #include #endif #include "xcb.h" #include "unlock_indicator.h" #define BUTTON_RADIUS 90 #define BUTTON_SPACE (BUTTON_RADIUS + 5) #define BUTTON_CENTER (BUTTON_RADIUS + 5) #define BUTTON_DIAMETER (5 * BUTTON_SPACE) /******************************************************************************* * Variables defined in i3lock.c. ******************************************************************************/ /* The current position in the input buffer. Useful to determine if any * characters of the password have already been entered or not. */ int input_position; /* The ev main loop. */ struct ev_loop *main_loop; /* The lock window. */ extern xcb_window_t win; /* The current resolution of the X11 root window. */ extern uint32_t last_resolution[2]; /* Whether the unlock indicator is enabled (defaults to true). */ extern bool unlock_indicator; /* A Cairo surface containing the specified image (-i), if any. */ extern cairo_surface_t *img; /* Whether the image should be tiled. */ extern bool tile; /* The background color to use (in hex). */ extern char color[7]; /******************************************************************************* * Local variables. ******************************************************************************/ static struct ev_timer *clear_indicator_timeout; /* Cache the screen’s visual, necessary for creating a Cairo context. */ static xcb_visualtype_t *vistype; /* Maintain the current unlock/PAM state to draw the appropriate unlock * indicator. */ unlock_state_t unlock_state; pam_state_t pam_state; /* * Draws global image with fill color onto a pixmap with the given * resolution and returns it. * */ xcb_pixmap_t draw_image(uint32_t *resolution) { xcb_pixmap_t bg_pixmap = XCB_NONE; #ifndef NOLIBCAIRO if (!vistype) vistype = get_root_visual_type(screen); bg_pixmap = create_bg_pixmap(conn, screen, resolution, color); /* Initialize cairo */ cairo_surface_t *output; output = cairo_xcb_surface_create(conn, bg_pixmap, vistype, resolution[0], resolution[1]); cairo_t *ctx = cairo_create(output); if (img) { if (!tile) { cairo_set_source_surface(ctx, img, 0, 0); cairo_paint(ctx); } else { /* create a pattern and fill a rectangle as big as the screen */ cairo_pattern_t *pattern; pattern = cairo_pattern_create_for_surface(img); cairo_set_source(ctx, pattern); cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT); cairo_rectangle(ctx, 0, 0, resolution[0], resolution[1]); cairo_fill(ctx); cairo_pattern_destroy(pattern); } } if (unlock_state >= STATE_KEY_PRESSED && unlock_indicator) { cairo_pattern_t *outer_pat = NULL; outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER); switch (pam_state) { case STATE_PAM_VERIFY: cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 0, 250.0/255); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 0, 250.0/255); break; case STATE_PAM_WRONG: cairo_pattern_add_color_stop_rgb(outer_pat, 0, 255.0/250, 139.0/255, 0); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 125.0/255, 51.0/255, 0); break; case STATE_PAM_IDLE: cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 125.0/255, 0); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 125.0/255, 0); break; } /* Draw a (centered) circle with transparent background. */ cairo_set_line_width(ctx, 10.0); cairo_arc(ctx, (resolution[0] / 2) /* x */, (resolution[1] / 2) /* y */, BUTTON_RADIUS /* radius */, 0 /* start */, 2 * M_PI /* end */); /* Use the appropriate color for the different PAM states * (currently verifying, wrong password, or default) */ switch (pam_state) { case STATE_PAM_VERIFY: cairo_set_source_rgba(ctx, 0, 114.0/255, 255.0/255, 0.75); break; case STATE_PAM_WRONG: cairo_set_source_rgba(ctx, 250.0/255, 0, 0, 0.75); break; default: cairo_set_source_rgba(ctx, 0, 0, 0, 0.75); break; } cairo_fill_preserve(ctx); cairo_set_source(ctx, outer_pat); cairo_stroke(ctx); /* Draw an inner seperator line. */ cairo_set_source_rgb(ctx, 0, 0, 0); cairo_set_line_width(ctx, 2.0); cairo_arc(ctx, (resolution[0] / 2) /* x */, (resolution[1] / 2) /* y */, BUTTON_RADIUS - 5 /* radius */, 0, 2 * M_PI); cairo_stroke(ctx); cairo_set_line_width(ctx, 10.0); /* Display a (centered) text of the current PAM state. */ char *text = NULL; switch (pam_state) { case STATE_PAM_VERIFY: text = "verifying…"; break; case STATE_PAM_WRONG: text = "wrong!"; break; default: break; } if (text) { cairo_text_extents_t extents; double x, y; cairo_set_source_rgb(ctx, 0, 0, 0); cairo_set_font_size(ctx, 28.0); cairo_text_extents(ctx, text, &extents); x = (resolution[0] / 2.0) - ((extents.width / 2) + extents.x_bearing); y = (resolution[1] / 2.0) - ((extents.height / 2) + extents.y_bearing); cairo_move_to(ctx, x, y); cairo_show_text(ctx, text); cairo_close_path(ctx); } /* After the user pressed any valid key or the backspace key, we * highlight a random part of the unlock indicator to confirm this * keypress. */ if (unlock_state == STATE_KEY_ACTIVE || unlock_state == STATE_BACKSPACE_ACTIVE) { cairo_new_sub_path(ctx); double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0; cairo_arc(ctx, resolution[0] / 2 /* x */, resolution[1] / 2 /* y */, BUTTON_RADIUS /* radius */, highlight_start, highlight_start + (M_PI / 3.0)); if (unlock_state == STATE_KEY_ACTIVE) { /* For normal keys, we use a lighter green. */ outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER); cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 219.0/255, 0); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 219.0/255, 0); } else { /* For backspace, we use red. */ outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER); cairo_pattern_add_color_stop_rgb(outer_pat, 0, 219.0/255, 139.0/255, 0); cairo_pattern_add_color_stop_rgb(outer_pat, 1, 219.0/255, 51.0/255, 0); } cairo_set_source(ctx, outer_pat); cairo_stroke(ctx); /* Draw two little separators for the highlighted part of the * unlock indicator. */ cairo_set_source_rgb(ctx, 0, 0, 0); cairo_arc(ctx, (resolution[0] / 2) /* x */, (resolution[1] / 2) /* y */, BUTTON_RADIUS /* radius */, highlight_start /* start */, highlight_start + (M_PI / 128.0) /* end */); cairo_stroke(ctx); cairo_arc(ctx, (resolution[0] / 2) /* x */, (resolution[1] / 2) /* y */, BUTTON_RADIUS /* radius */, highlight_start + (M_PI / 3.0) /* start */, (highlight_start + (M_PI / 3.0)) + (M_PI / 128.0) /* end */); cairo_stroke(ctx); } } cairo_surface_destroy(output); cairo_destroy(ctx); #endif return bg_pixmap; } /* * Calls draw_image on a new pixmap and swaps that with the current pixmap * */ void redraw_screen() { xcb_pixmap_t bg_pixmap = draw_image(last_resolution); xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap }); /* XXX: Possible optimization: Only update the area in the middle of the * screen instead of the whole screen. */ xcb_clear_area(conn, 0, win, 0, 0, screen->width_in_pixels, screen->height_in_pixels); xcb_free_pixmap(conn, bg_pixmap); xcb_flush(conn); } /* * Hides the unlock indicator completely when there is no content in the * password buffer. * */ static void clear_indicator(EV_P_ ev_timer *w, int revents) { if (input_position == 0) { unlock_state = STATE_STARTED; } else unlock_state = STATE_KEY_PRESSED; redraw_screen(); ev_timer_stop(main_loop, clear_indicator_timeout); free(clear_indicator_timeout); clear_indicator_timeout = NULL; } /* * (Re-)starts the clear_indicator timeout. Called after pressing backspace or * after an unsuccessful authentication attempt. * */ void start_clear_indicator_timeout() { if (clear_indicator_timeout) { ev_timer_stop(main_loop, clear_indicator_timeout); ev_timer_set(clear_indicator_timeout, 1.0, 0.); ev_timer_start(main_loop, clear_indicator_timeout); } else { /* When there is no memory, we just don’t have a timeout. We cannot * exit() here, since that would effectively unlock the screen. */ if (!(clear_indicator_timeout = calloc(sizeof(struct ev_timer), 1))) return; ev_timer_init(clear_indicator_timeout, clear_indicator, 1.0, 0.); ev_timer_start(main_loop, clear_indicator_timeout); } } /* * Stops the clear_indicator timeout. * */ void stop_clear_indicator_timeout() { if (clear_indicator_timeout) { ev_timer_stop(main_loop, clear_indicator_timeout); free(clear_indicator_timeout); clear_indicator_timeout = NULL; } }