PolytreeDE/i3lock-color
1
0
Fork 0
mirror of https://github.com/Raymo111/i3lock-color.git synced 2024-11-11 13:50:52 -05:00
Code Releases Activity
i3lock-color/unlock_indicator.c
eplanet d2130092cf Display error message when locking failed (#99) 
To give a feedback for when the pointer couldn't be grabbed,
displaying an error message before exiting.
2016-10-11 13:40:51 -07:00

358 lines
13 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* vim:ts=4:sw=4:expandtab
*
* © 2010 Michael Stapelberg
*
* See LICENSE for licensing information
*
*/
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <xcb/xcb.h>
#include <ev.h>
#include <cairo.h>
#include <cairo/cairo-xcb.h>
#include "i3lock.h"
#include "xcb.h"
#include "unlock_indicator.h"
#include "xinerama.h"
#define BUTTON_RADIUS 90
#define BUTTON_SPACE (BUTTON_RADIUS + 5)
#define BUTTON_CENTER (BUTTON_RADIUS + 5)
#define BUTTON_DIAMETER (2 * BUTTON_SPACE)
/*******************************************************************************
* Variables defined in i3lock.c.
******************************************************************************/
extern bool debug_mode;
/* 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 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;
/* List of pressed modifiers, or NULL if none are pressed. */
extern char *modifier_string;
/* 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];
/* Whether the failed attempts should be displayed. */
extern bool show_failed_attempts;
/* Number of failed unlock attempts. */
extern int failed_attempts;
/*******************************************************************************
* Variables defined in xcb.c.
******************************************************************************/
/* The root screen, to determine the DPI. */
extern xcb_screen_t *screen;
/*******************************************************************************
* 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;
/*
* Returns the scaling factor of the current screen. E.g., on a 227 DPI MacBook
* Pro 13" Retina screen, the scaling factor is 227/96 = 2.36.
*
*/
static double scaling_factor(void) {
const int dpi = (double)screen->height_in_pixels * 25.4 /
(double)screen->height_in_millimeters;
return (dpi / 96.0);
}
/*
* 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;
int button_diameter_physical = ceil(scaling_factor() * BUTTON_DIAMETER);
DEBUG("scaling_factor is %.f, physical diameter is %d px\n",
scaling_factor(), button_diameter_physical);
if (!vistype)
vistype = get_root_visual_type(screen);
bg_pixmap = create_bg_pixmap(conn, screen, resolution, color);
/* Initialize cairo: Create one in-memory surface to render the unlock
* indicator on, create one XCB surface to actually draw (one or more,
* depending on the amount of screens) unlock indicators on. */
cairo_surface_t *output = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, button_diameter_physical, button_diameter_physical);
cairo_t *ctx = cairo_create(output);
cairo_surface_t *xcb_output = cairo_xcb_surface_create(conn, bg_pixmap, vistype, resolution[0], resolution[1]);
cairo_t *xcb_ctx = cairo_create(xcb_output);
if (img) {
if (!tile) {
cairo_set_source_surface(xcb_ctx, img, 0, 0);
cairo_paint(xcb_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(xcb_ctx, pattern);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
cairo_fill(xcb_ctx);
cairo_pattern_destroy(pattern);
}
} else {
char strgroups[3][3] = {{color[0], color[1], '\0'},
{color[2], color[3], '\0'},
{color[4], color[5], '\0'}};
uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
(strtol(strgroups[1], NULL, 16)),
(strtol(strgroups[2], NULL, 16))};
cairo_set_source_rgb(xcb_ctx, rgb16[0] / 255.0, rgb16[1] / 255.0, rgb16[2] / 255.0);
cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
cairo_fill(xcb_ctx);
}
if (unlock_indicator &&
(unlock_state >= STATE_KEY_PRESSED || pam_state > STATE_PAM_IDLE)) {
cairo_scale(ctx, scaling_factor(), scaling_factor());
/* Draw a (centered) circle with transparent background. */
cairo_set_line_width(ctx, 10.0);
cairo_arc(ctx,
BUTTON_CENTER /* x */,
BUTTON_CENTER /* 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:
case STATE_PAM_LOCK:
cairo_set_source_rgba(ctx, 0, 114.0 / 255, 255.0 / 255, 0.75);
break;
case STATE_PAM_WRONG:
case STATE_I3LOCK_LOCK_FAILED:
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);
switch (pam_state) {
case STATE_PAM_VERIFY:
case STATE_PAM_LOCK:
cairo_set_source_rgb(ctx, 51.0 / 255, 0, 250.0 / 255);
break;
case STATE_PAM_WRONG:
case STATE_I3LOCK_LOCK_FAILED:
cairo_set_source_rgb(ctx, 125.0 / 255, 51.0 / 255, 0);
break;
case STATE_PAM_IDLE:
cairo_set_source_rgb(ctx, 51.0 / 255, 125.0 / 255, 0);
break;
}
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,
BUTTON_CENTER /* x */,
BUTTON_CENTER /* 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;
/* We don't want to show more than a 3-digit number. */
char buf[4];
cairo_set_source_rgb(ctx, 0, 0, 0);
cairo_select_font_face(ctx, "sans-serif", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(ctx, 28.0);
switch (pam_state) {
case STATE_PAM_VERIFY:
text = "verifying…";
break;
case STATE_PAM_LOCK:
text = "locking…";
break;
case STATE_PAM_WRONG:
text = "wrong!";
break;
case STATE_I3LOCK_LOCK_FAILED:
text = "lock failed!";
break;
default:
if (show_failed_attempts && failed_attempts > 0) {
if (failed_attempts > 999) {
text = "> 999";
} else {
snprintf(buf, sizeof(buf), "%d", failed_attempts);
text = buf;
}
cairo_set_source_rgb(ctx, 1, 0, 0);
cairo_set_font_size(ctx, 32.0);
}
break;
}
if (text) {
cairo_text_extents_t extents;
double x, y;
cairo_text_extents(ctx, text, &extents);
x = BUTTON_CENTER - ((extents.width / 2) + extents.x_bearing);
y = BUTTON_CENTER - ((extents.height / 2) + extents.y_bearing);
cairo_move_to(ctx, x, y);
cairo_show_text(ctx, text);
cairo_close_path(ctx);
}
if (pam_state == STATE_PAM_WRONG && (modifier_string != NULL)) {
cairo_text_extents_t extents;
double x, y;
cairo_set_font_size(ctx, 14.0);
cairo_text_extents(ctx, modifier_string, &extents);
x = BUTTON_CENTER - ((extents.width / 2) + extents.x_bearing);
y = BUTTON_CENTER - ((extents.height / 2) + extents.y_bearing) + 28.0;
cairo_move_to(ctx, x, y);
cairo_show_text(ctx, modifier_string);
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,
BUTTON_CENTER /* x */,
BUTTON_CENTER /* 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. */
cairo_set_source_rgb(ctx, 51.0 / 255, 219.0 / 255, 0);
} else {
/* For backspace, we use red. */
cairo_set_source_rgb(ctx, 219.0 / 255, 51.0 / 255, 0);
}
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,
BUTTON_CENTER /* x */,
BUTTON_CENTER /* y */,
BUTTON_RADIUS /* radius */,
highlight_start /* start */,
highlight_start + (M_PI / 128.0) /* end */);
cairo_stroke(ctx);
cairo_arc(ctx,
BUTTON_CENTER /* x */,
BUTTON_CENTER /* 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);
}
}
if (xr_screens > 0) {
/* Composite the unlock indicator in the middle of each screen. */
for (int screen = 0; screen < xr_screens; screen++) {
int x = (xr_resolutions[screen].x + ((xr_resolutions[screen].width / 2) - (button_diameter_physical / 2)));
int y = (xr_resolutions[screen].y + ((xr_resolutions[screen].height / 2) - (button_diameter_physical / 2)));
cairo_set_source_surface(xcb_ctx, output, x, y);
cairo_rectangle(xcb_ctx, x, y, button_diameter_physical, button_diameter_physical);
cairo_fill(xcb_ctx);
}
} else {
/* We have no information about the screen sizes/positions, so we just
* place the unlock indicator in the middle of the X root window and
* hope for the best. */
int x = (last_resolution[0] / 2) - (button_diameter_physical / 2);
int y = (last_resolution[1] / 2) - (button_diameter_physical / 2);
cairo_set_source_surface(xcb_ctx, output, x, y);
cairo_rectangle(xcb_ctx, x, y, button_diameter_physical, button_diameter_physical);
cairo_fill(xcb_ctx);
}
cairo_surface_destroy(xcb_output);
cairo_surface_destroy(output);
cairo_destroy(ctx);
cairo_destroy(xcb_ctx);
return bg_pixmap;
}
/*
* Calls draw_image on a new pixmap and swaps that with the current pixmap
*
*/
void redraw_screen(void) {
DEBUG("redraw_screen(unlock_state = %d, pam_state = %d)\n", unlock_state, pam_state);
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, last_resolution[0], last_resolution[1]);
xcb_free_pixmap(conn, bg_pixmap);
xcb_flush(conn);
}
/*
* Hides the unlock indicator completely when there is no content in the
* password buffer.
*
*/
void clear_indicator(void) {
if (input_position == 0) {
unlock_state = STATE_STARTED;
} else
unlock_state = STATE_KEY_PRESSED;
redraw_screen();
}
View git blame Copy permalink