diff options
Diffstat (limited to 'unlock_indicator.c')
-rw-r--r-- | unlock_indicator.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/unlock_indicator.c b/unlock_indicator.c new file mode 100644 index 0000000..2c4d054 --- /dev/null +++ b/unlock_indicator.c @@ -0,0 +1,242 @@ +/* + * vim:ts=4:sw=4:expandtab + * + * © 2010-2012 Michael Stapelberg + * + * See LICENSE for licensing information + * + */ +#include <stdbool.h> +#include <stdlib.h> +#include <math.h> +#include <xcb/xcb.h> +#include <xcb/xcb_keysyms.h> + +#ifndef NOLIBCAIRO +#include <cairo.h> +#include <cairo/cairo-xcb.h> +#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 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. + ******************************************************************************/ + +/* 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); +} |