mirror of https://github.com/i3/i3lock.git
243 lines
8.6 KiB
C
243 lines
8.6 KiB
C
/*
|
||
* 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);
|
||
}
|