From 69a05d516bd0c7e369a0ba1fb78aac57a5ea26f2 Mon Sep 17 00:00:00 2001 From: Simeon Simeonov Date: Thu, 12 Mar 2020 12:30:51 +0100 Subject: Initial commit for the last i3lock commit at this time f3b061233e28ad0cf920c9421adc2459b6920812 --- unlock_indicator.c | 361 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 361 insertions(+) create mode 100644 unlock_indicator.c (limited to 'unlock_indicator.c') diff --git a/unlock_indicator.c b/unlock_indicator.c new file mode 100644 index 0000000..d6237ed --- /dev/null +++ b/unlock_indicator.c @@ -0,0 +1,361 @@ +/* + * vim:ts=4:sw=4:expandtab + * + * © 2010 Michael Stapelberg + * + * See LICENSE for licensing information + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "i3lock.h" +#include "xcb.h" +#include "unlock_indicator.h" +#include "randr.h" +#include "dpi.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. */ +extern 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; +auth_state_t auth_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; + const double scaling_factor = get_dpi_value() / 96.0; + 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 || auth_state > STATE_AUTH_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 (auth_state) { + case STATE_AUTH_VERIFY: + case STATE_AUTH_LOCK: + cairo_set_source_rgba(ctx, 0, 114.0 / 255, 255.0 / 255, 0.75); + break; + case STATE_AUTH_WRONG: + case STATE_I3LOCK_LOCK_FAILED: + cairo_set_source_rgba(ctx, 250.0 / 255, 0, 0, 0.75); + break; + default: + if (unlock_state == STATE_NOTHING_TO_DELETE) { + cairo_set_source_rgba(ctx, 250.0 / 255, 0, 0, 0.75); + break; + } + cairo_set_source_rgba(ctx, 0, 0, 0, 0.75); + break; + } + cairo_fill_preserve(ctx); + + switch (auth_state) { + case STATE_AUTH_VERIFY: + case STATE_AUTH_LOCK: + cairo_set_source_rgb(ctx, 51.0 / 255, 0, 250.0 / 255); + break; + case STATE_AUTH_WRONG: + case STATE_I3LOCK_LOCK_FAILED: + cairo_set_source_rgb(ctx, 125.0 / 255, 51.0 / 255, 0); + break; + case STATE_AUTH_IDLE: + if (unlock_state == STATE_NOTHING_TO_DELETE) { + cairo_set_source_rgb(ctx, 125.0 / 255, 51.0 / 255, 0); + break; + } + + 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 (auth_state) { + case STATE_AUTH_VERIFY: + text = "Verifying…"; + break; + case STATE_AUTH_LOCK: + text = "Locking…"; + break; + case STATE_AUTH_WRONG: + text = "Wrong!"; + break; + case STATE_I3LOCK_LOCK_FAILED: + text = "Lock failed!"; + break; + default: + if (unlock_state == STATE_NOTHING_TO_DELETE) { + text = "No input"; + } + 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 (auth_state == STATE_AUTH_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)) - (M_PI / 128.0) /* start */, + highlight_start + (M_PI / 3.0) /* 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, auth_state = %d)\n", unlock_state, auth_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(); +} -- cgit v1.3