Michael Stapelberg
13 years ago
5 changed files with 292 additions and 230 deletions
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/*
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* vim:ts=4:sw=4:expandtab |
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* |
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* © 2010-2012 Michael Stapelberg |
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* |
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* See LICENSE for licensing information |
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* |
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*/ |
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#include <stdbool.h> |
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#include <stdlib.h> |
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#include <math.h> |
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#include <xcb/xcb.h> |
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#include <xcb/xcb_keysyms.h> |
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#ifndef NOLIBCAIRO |
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#include <cairo.h> |
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#include <cairo/cairo-xcb.h> |
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#endif |
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#include "xcb.h" |
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#include "unlock_indicator.h" |
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#define BUTTON_RADIUS 90 |
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#define BUTTON_SPACE (BUTTON_RADIUS + 5) |
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#define BUTTON_CENTER (BUTTON_RADIUS + 5) |
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#define BUTTON_DIAMETER (5 * BUTTON_SPACE) |
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/*******************************************************************************
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* Variables defined in i3lock.c. |
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******************************************************************************/ |
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/* The lock window. */ |
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extern xcb_window_t win; |
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/* The current resolution of the X11 root window. */ |
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extern uint32_t last_resolution[2]; |
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/* Whether the unlock indicator is enabled (defaults to true). */ |
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extern bool unlock_indicator; |
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/* A Cairo surface containing the specified image (-i), if any. */ |
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extern cairo_surface_t *img; |
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/* Whether the image should be tiled. */ |
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extern bool tile; |
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/* The background color to use (in hex). */ |
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extern char color[7]; |
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/*******************************************************************************
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* Local variables. |
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******************************************************************************/ |
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/* Cache the screen’s visual, necessary for creating a Cairo context. */ |
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static xcb_visualtype_t *vistype; |
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/* Maintain the current unlock/PAM state to draw the appropriate unlock
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* indicator. */ |
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unlock_state_t unlock_state; |
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pam_state_t pam_state; |
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/*
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* Draws global image with fill color onto a pixmap with the given |
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* resolution and returns it. |
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* |
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*/ |
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xcb_pixmap_t draw_image(uint32_t *resolution) { |
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xcb_pixmap_t bg_pixmap = XCB_NONE; |
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#ifndef NOLIBCAIRO |
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if (!vistype) |
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vistype = get_root_visual_type(screen); |
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bg_pixmap = create_bg_pixmap(conn, screen, resolution, color); |
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/* Initialize cairo */ |
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cairo_surface_t *output; |
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output = cairo_xcb_surface_create(conn, bg_pixmap, vistype, |
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resolution[0], resolution[1]); |
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cairo_t *ctx = cairo_create(output); |
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if (img) { |
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if (!tile) { |
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cairo_set_source_surface(ctx, img, 0, 0); |
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cairo_paint(ctx); |
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} else { |
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/* create a pattern and fill a rectangle as big as the screen */ |
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cairo_pattern_t *pattern; |
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pattern = cairo_pattern_create_for_surface(img); |
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cairo_set_source(ctx, pattern); |
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cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT); |
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cairo_rectangle(ctx, 0, 0, resolution[0], resolution[1]); |
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cairo_fill(ctx); |
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cairo_pattern_destroy(pattern); |
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} |
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} |
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if (unlock_state >= STATE_KEY_PRESSED && unlock_indicator) { |
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cairo_pattern_t *outer_pat = NULL; |
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outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER); |
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switch (pam_state) { |
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case STATE_PAM_VERIFY: |
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cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 0, 250.0/255); |
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cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 0, 250.0/255); |
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break; |
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case STATE_PAM_WRONG: |
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cairo_pattern_add_color_stop_rgb(outer_pat, 0, 255.0/250, 139.0/255, 0); |
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cairo_pattern_add_color_stop_rgb(outer_pat, 1, 125.0/255, 51.0/255, 0); |
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break; |
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case STATE_PAM_IDLE: |
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cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 125.0/255, 0); |
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cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 125.0/255, 0); |
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break; |
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} |
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/* Draw a (centered) circle with transparent background. */ |
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cairo_set_line_width(ctx, 10.0); |
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cairo_arc(ctx, |
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(resolution[0] / 2) /* x */, |
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(resolution[1] / 2) /* y */, |
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BUTTON_RADIUS /* radius */, |
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0 /* start */, |
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2 * M_PI /* end */); |
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/* Use the appropriate color for the different PAM states
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* (currently verifying, wrong password, or default) */ |
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switch (pam_state) { |
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case STATE_PAM_VERIFY: |
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cairo_set_source_rgba(ctx, 0, 114.0/255, 255.0/255, 0.75); |
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break; |
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case STATE_PAM_WRONG: |
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cairo_set_source_rgba(ctx, 250.0/255, 0, 0, 0.75); |
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break; |
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default: |
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cairo_set_source_rgba(ctx, 0, 0, 0, 0.75); |
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break; |
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} |
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cairo_fill_preserve(ctx); |
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cairo_set_source(ctx, outer_pat); |
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cairo_stroke(ctx); |
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/* Draw an inner seperator line. */ |
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cairo_set_source_rgb(ctx, 0, 0, 0); |
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cairo_set_line_width(ctx, 2.0); |
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cairo_arc(ctx, |
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(resolution[0] / 2) /* x */, |
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(resolution[1] / 2) /* y */, |
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BUTTON_RADIUS - 5 /* radius */, |
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0, |
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2 * M_PI); |
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cairo_stroke(ctx); |
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cairo_set_line_width(ctx, 10.0); |
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/* Display a (centered) text of the current PAM state. */ |
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char *text = NULL; |
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switch (pam_state) { |
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case STATE_PAM_VERIFY: |
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text = "verifying…"; |
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break; |
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case STATE_PAM_WRONG: |
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text = "wrong!"; |
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break; |
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default: |
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break; |
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} |
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if (text) { |
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cairo_text_extents_t extents; |
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double x, y; |
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cairo_set_source_rgb(ctx, 0, 0, 0); |
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cairo_set_font_size(ctx, 28.0); |
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cairo_text_extents(ctx, text, &extents); |
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x = (resolution[0] / 2.0) - ((extents.width / 2) + extents.x_bearing); |
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y = (resolution[1] / 2.0) - ((extents.height / 2) + extents.y_bearing); |
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cairo_move_to(ctx, x, y); |
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cairo_show_text(ctx, text); |
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cairo_close_path(ctx); |
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} |
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/* After the user pressed any valid key or the backspace key, we
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* highlight a random part of the unlock indicator to confirm this |
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* keypress. */ |
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if (unlock_state == STATE_KEY_ACTIVE || |
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unlock_state == STATE_BACKSPACE_ACTIVE) { |
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cairo_new_sub_path(ctx); |
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double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0; |
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cairo_arc(ctx, resolution[0] / 2 /* x */, resolution[1] / 2 /* y */, |
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BUTTON_RADIUS /* radius */, highlight_start, |
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highlight_start + (M_PI / 3.0)); |
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if (unlock_state == STATE_KEY_ACTIVE) { |
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/* For normal keys, we use a lighter green. */ |
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outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER); |
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cairo_pattern_add_color_stop_rgb(outer_pat, 0, 139.0/255, 219.0/255, 0); |
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cairo_pattern_add_color_stop_rgb(outer_pat, 1, 51.0/255, 219.0/255, 0); |
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} else { |
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/* For backspace, we use red. */ |
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outer_pat = cairo_pattern_create_linear(0, 0, 0, BUTTON_DIAMETER); |
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cairo_pattern_add_color_stop_rgb(outer_pat, 0, 219.0/255, 139.0/255, 0); |
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cairo_pattern_add_color_stop_rgb(outer_pat, 1, 219.0/255, 51.0/255, 0); |
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} |
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cairo_set_source(ctx, outer_pat); |
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cairo_stroke(ctx); |
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/* Draw two little separators for the highlighted part of the
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* unlock indicator. */ |
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cairo_set_source_rgb(ctx, 0, 0, 0); |
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cairo_arc(ctx, |
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(resolution[0] / 2) /* x */, |
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(resolution[1] / 2) /* y */, |
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BUTTON_RADIUS /* radius */, |
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highlight_start /* start */, |
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highlight_start + (M_PI / 128.0) /* end */); |
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cairo_stroke(ctx); |
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cairo_arc(ctx, |
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(resolution[0] / 2) /* x */, |
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(resolution[1] / 2) /* y */, |
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BUTTON_RADIUS /* radius */, |
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highlight_start + (M_PI / 3.0) /* start */, |
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(highlight_start + (M_PI / 3.0)) + (M_PI / 128.0) /* end */); |
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cairo_stroke(ctx); |
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} |
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} |
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cairo_surface_destroy(output); |
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cairo_destroy(ctx); |
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#endif |
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return bg_pixmap; |
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} |
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/*
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* Calls draw_image on a new pixmap and swaps that with the current pixmap |
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* |
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*/ |
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void redraw_screen() { |
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xcb_pixmap_t bg_pixmap = draw_image(last_resolution); |
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xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap }); |
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/* XXX: Possible optimization: Only update the area in the middle of the
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* screen instead of the whole screen. */ |
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xcb_clear_area(conn, 0, win, 0, 0, screen->width_in_pixels, screen->height_in_pixels); |
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xcb_free_pixmap(conn, bg_pixmap); |
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xcb_flush(conn); |
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} |
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@ -0,0 +1,22 @@ |
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#ifndef _UNLOCK_INDICATOR_H |
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#define _UNLOCK_INDICATOR_H |
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typedef enum { |
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STATE_STARTED = 0, /* default state */ |
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STATE_KEY_PRESSED = 1, /* key was pressed, show unlock indicator */ |
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STATE_KEY_ACTIVE = 2, /* a key was pressed recently, highlight part
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of the unlock indicator. */ |
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STATE_BACKSPACE_ACTIVE = 3 /* backspace was pressed recently, highlight
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part of the unlock indicator in red. */ |
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} unlock_state_t; |
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typedef enum { |
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STATE_PAM_IDLE = 0, /* no PAM interaction at the moment */ |
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STATE_PAM_VERIFY = 1, /* currently verifying the password via PAM */ |
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STATE_PAM_WRONG = 2 /* the password was wrong */ |
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} pam_state_t; |
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xcb_pixmap_t draw_image(uint32_t* resolution); |
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void redraw_screen(); |
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#endif |
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