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i3lock-color/unlock_indicator.c
Chris Guillott ed326ee463 add option for single-display unlock indicator
2016-02-17 07:51:04 -05:00

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/*
* 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];
/* indicator color options */
extern char insidevercolor[9];
extern char insidewrongcolor[9];
extern char insidecolor[9];
extern char ringvercolor[9];
extern char ringwrongcolor[9];
extern char ringcolor[9];
extern char linecolor[9];
extern char textcolor[9];
extern char keyhlcolor[9];
extern char bshlcolor[9];
extern char separatorcolor[9];
extern int internal_line_source;
extern int screen_number;
/* 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);
}
/* build indicator color arrays */
char strgroupsiv[4][3] = {{insidevercolor[0], insidevercolor[1], '\0'},
{insidevercolor[2], insidevercolor[3], '\0'},
{insidevercolor[4], insidevercolor[5], '\0'},
{insidevercolor[6], insidevercolor[7], '\0'}};
uint32_t insidever16[4] = {(strtol(strgroupsiv[0], NULL, 16)),
(strtol(strgroupsiv[1], NULL, 16)),
(strtol(strgroupsiv[2], NULL, 16)),
(strtol(strgroupsiv[3], NULL, 16))};
char strgroupsiw[4][3] = {{insidewrongcolor[0], insidewrongcolor[1], '\0'},
{insidewrongcolor[2], insidewrongcolor[3], '\0'},
{insidewrongcolor[4], insidewrongcolor[5], '\0'},
{insidewrongcolor[6], insidewrongcolor[7], '\0'}};
uint32_t insidewrong16[4] = {(strtol(strgroupsiw[0], NULL, 16)),
(strtol(strgroupsiw[1], NULL, 16)),
(strtol(strgroupsiw[2], NULL, 16)),
(strtol(strgroupsiw[3], NULL, 16))};
char strgroupsi[4][3] = {{insidecolor[0], insidecolor[1], '\0'},
{insidecolor[2], insidecolor[3], '\0'},
{insidecolor[4], insidecolor[5], '\0'},
{insidecolor[6], insidecolor[7], '\0'}};
uint32_t inside16[4] = {(strtol(strgroupsi[0], NULL, 16)),
(strtol(strgroupsi[1], NULL, 16)),
(strtol(strgroupsi[2], NULL, 16)),
(strtol(strgroupsi[3], NULL, 16))};
char strgroupsrv[4][3] = {{ringvercolor[0], ringvercolor[1], '\0'},
{ringvercolor[2], ringvercolor[3], '\0'},
{ringvercolor[4], ringvercolor[5], '\0'},
{ringvercolor[6], ringvercolor[7], '\0'}};
uint32_t ringver16[4] = {(strtol(strgroupsrv[0], NULL, 16)),
(strtol(strgroupsrv[1], NULL, 16)),
(strtol(strgroupsrv[2], NULL, 16)),
(strtol(strgroupsrv[3], NULL, 16))};
char strgroupsrw[4][3] = {{ringwrongcolor[0], ringwrongcolor[1], '\0'},
{ringwrongcolor[2], ringwrongcolor[3], '\0'},
{ringwrongcolor[4], ringwrongcolor[5], '\0'},
{ringwrongcolor[6], ringwrongcolor[7], '\0'}};
uint32_t ringwrong16[4] = {(strtol(strgroupsrw[0], NULL, 16)),
(strtol(strgroupsrw[1], NULL, 16)),
(strtol(strgroupsrw[2], NULL, 16)),
(strtol(strgroupsrw[3], NULL, 16))};
char strgroupsr[4][3] = {{ringcolor[0], ringcolor[1], '\0'},
{ringcolor[2], ringcolor[3], '\0'},
{ringcolor[4], ringcolor[5], '\0'},
{ringcolor[6], ringcolor[7], '\0'}};
uint32_t ring16[4] = {(strtol(strgroupsr[0], NULL, 16)),
(strtol(strgroupsr[1], NULL, 16)),
(strtol(strgroupsr[2], NULL, 16)),
(strtol(strgroupsr[3], NULL, 16))};
char strgroupsl[4][3] = {{linecolor[0], linecolor[1], '\0'},
{linecolor[2], linecolor[3], '\0'},
{linecolor[4], linecolor[5], '\0'},
{linecolor[6], linecolor[7], '\0'}};
uint32_t line16[4] = {(strtol(strgroupsl[0], NULL, 16)),
(strtol(strgroupsl[1], NULL, 16)),
(strtol(strgroupsl[2], NULL, 16)),
(strtol(strgroupsl[3], NULL, 16))};
char strgroupst[4][3] = {{textcolor[0], textcolor[1], '\0'},
{textcolor[2], textcolor[3], '\0'},
{textcolor[4], textcolor[5], '\0'},
{textcolor[6], textcolor[7], '\0'}};
uint32_t text16[4] = {(strtol(strgroupst[0], NULL, 16)),
(strtol(strgroupst[1], NULL, 16)),
(strtol(strgroupst[2], NULL, 16)),
(strtol(strgroupst[3], NULL, 16))};
char strgroupsk[4][3] = {{keyhlcolor[0], keyhlcolor[1], '\0'},
{keyhlcolor[2], keyhlcolor[3], '\0'},
{keyhlcolor[4], keyhlcolor[5], '\0'},
{keyhlcolor[6], keyhlcolor[7], '\0'}};
uint32_t keyhl16[4] = {(strtol(strgroupsk[0], NULL, 16)),
(strtol(strgroupsk[1], NULL, 16)),
(strtol(strgroupsk[2], NULL, 16)),
(strtol(strgroupsk[3], NULL, 16))};
char strgroupsb[4][3] = {{bshlcolor[0], bshlcolor[1], '\0'},
{bshlcolor[2], bshlcolor[3], '\0'},
{bshlcolor[4], bshlcolor[5], '\0'},
{bshlcolor[6], bshlcolor[7], '\0'}};
uint32_t bshl16[4] = {(strtol(strgroupsb[0], NULL, 16)),
(strtol(strgroupsb[1], NULL, 16)),
(strtol(strgroupsb[2], NULL, 16)),
(strtol(strgroupsb[3], NULL, 16))};
char strgroupss[4][3] = {{separatorcolor[0], separatorcolor[1], '\0'},
{separatorcolor[2], separatorcolor[3], '\0'},
{separatorcolor[4], separatorcolor[5], '\0'},
{separatorcolor[6], separatorcolor[7], '\0'}};
uint32_t sep16[4] = {(strtol(strgroupss[0], NULL, 16)),
(strtol(strgroupss[1], NULL, 16)),
(strtol(strgroupss[2], NULL, 16)),
(strtol(strgroupss[3], NULL, 16))};
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:
cairo_set_source_rgba(ctx, (double)insidever16[0]/255, (double)insidever16[1]/255, (double)insidever16[2]/255, (double)insidever16[3]/255);
break;
case STATE_PAM_WRONG:
cairo_set_source_rgba(ctx, (double)insidewrong16[0]/255, (double)insidewrong16[1]/255, (double)insidewrong16[2]/255, (double)insidewrong16[3]/255);
break;
default:
cairo_set_source_rgba(ctx, (double)inside16[0]/255, (double)inside16[1]/255, (double)inside16[2]/255, (double)inside16[3]/255);
break;
}
cairo_fill_preserve(ctx);
switch (pam_state) {
case STATE_PAM_VERIFY:
cairo_set_source_rgba(ctx, (double)ringver16[0]/255, (double)ringver16[1]/255, (double)ringver16[2]/255, (double)ringver16[3]/255);
if (internal_line_source == 1) {
line16[0] = ringver16[0];
line16[1] = ringver16[1];
line16[2] = ringver16[2];
line16[3] = ringver16[3];
}
break;
case STATE_PAM_WRONG:
cairo_set_source_rgba(ctx, (double)ringwrong16[0]/255, (double)ringwrong16[1]/255, (double)ringwrong16[2]/255, (double)ringwrong16[3]/255);
if (internal_line_source == 1) {
line16[0] = ringwrong16[0];
line16[1] = ringwrong16[1];
line16[2] = ringwrong16[2];
line16[3] = ringwrong16[3];
}
break;
case STATE_PAM_IDLE:
cairo_set_source_rgba(ctx, (double)ring16[0]/255, (double)ring16[1]/255, (double)ring16[2]/255, (double)ring16[3]/255);
if (internal_line_source == 1) {
line16[0] = ring16[0];
line16[1] = ring16[1];
line16[2] = ring16[2];
line16[3] = ring16[3];
}
break;
}
cairo_stroke(ctx);
/* Draw an inner separator line. */
if (internal_line_source != 2) { //pretty sure this only needs drawn if it's being drawn over the inside?
cairo_set_source_rgba(ctx, (double)line16[0]/255, (double)line16[1]/255, (double)line16[2]/255, (double)line16[3]/255);
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_rgba(ctx, (double)text16[0]/255, (double)text16[1]/255, (double)text16[2]/255, (double)text16[3]/255); //this was moved up to here
cairo_set_font_size(ctx, 28.0);
switch (pam_state) {
case STATE_PAM_VERIFY:
text = "verifying…";
break;
case STATE_PAM_WRONG:
text = "wrong!";
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_rgba(ctx, (double)text16[0]/255, (double)text16[1]/255, (double)text16[2]/255, (double)text16[3]/255);
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. */ //lol no
cairo_set_source_rgba(ctx, (double)keyhl16[0]/255, (double)keyhl16[1]/255, (double)keyhl16[2]/255, (double)keyhl16[3]/255);
} else {
/* For backspace, we use red. */ //lol no
cairo_set_source_rgba(ctx, (double)bshl16[0]/255, (double)bshl16[1]/255, (double)bshl16[2]/255, (double)bshl16[3]/255);
}
cairo_stroke(ctx);
/* Draw two little separators for the highlighted part of the
* unlock indicator. */
cairo_set_source_rgba(ctx, (double)sep16[0]/255, (double)sep16[1]/255, (double)sep16[2]/255, (double)sep16[3]/255);
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. */
// excuse me, just gonna hack something in right here
if (screen_number != -1 && screen_number < xr_screens) {
int x = (xr_resolutions[screen_number].x + ((xr_resolutions[screen_number].width / 2) - (button_diameter_physical / 2)));
int y = (xr_resolutions[screen_number].y + ((xr_resolutions[screen_number].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 {
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();
}
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