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 --- xcb.c | 434 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 434 insertions(+) create mode 100644 xcb.c (limited to 'xcb.c') diff --git a/xcb.c b/xcb.c new file mode 100644 index 0000000..2867a47 --- /dev/null +++ b/xcb.c @@ -0,0 +1,434 @@ +/* + * vim:ts=4:sw=4:expandtab + * + * © 2010 Michael Stapelberg + * + * xcb.c: contains all functions which use XCB to talk to X11. Mostly wrappers + * around the rather complicated/ugly parts of the XCB API. + * + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "cursors.h" +#include "unlock_indicator.h" + +extern auth_state_t auth_state; + +xcb_connection_t *conn; +xcb_screen_t *screen; + +static xcb_atom_t _NET_WM_BYPASS_COMPOSITOR = XCB_NONE; +void _init_net_wm_bypass_compositor(xcb_connection_t *conn) { + if (_NET_WM_BYPASS_COMPOSITOR != XCB_NONE) { + /* already initialized */ + return; + } + xcb_generic_error_t *err; + xcb_intern_atom_reply_t *atom_reply = xcb_intern_atom_reply( + conn, + xcb_intern_atom(conn, 0, strlen("_NET_WM_BYPASS_COMPOSITOR"), "_NET_WM_BYPASS_COMPOSITOR"), + &err); + if (atom_reply == NULL) { + fprintf(stderr, "X11 Error %d\n", err->error_code); + free(err); + return; + } + _NET_WM_BYPASS_COMPOSITOR = atom_reply->atom; + free(atom_reply); +} + +#define curs_invisible_width 8 +#define curs_invisible_height 8 + +static unsigned char curs_invisible_bits[] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; + +#define curs_windows_width 11 +#define curs_windows_height 19 + +static unsigned char curs_windows_bits[] = { + 0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07, + 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07, + 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05, + 0x7f, 0x06}; + +#define mask_windows_width 11 +#define mask_windows_height 19 + +static unsigned char mask_windows_bits[] = { + 0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00, + 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00, + 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03, + 0x80, 0x01}; + +static uint32_t get_colorpixel(char *hex) { + char strgroups[3][3] = {{hex[0], hex[1], '\0'}, + {hex[2], hex[3], '\0'}, + {hex[4], hex[5], '\0'}}; + uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)), + (strtol(strgroups[1], NULL, 16)), + (strtol(strgroups[2], NULL, 16))}; + + return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2]; +} + +xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) { + xcb_visualtype_t *visual_type = NULL; + xcb_depth_iterator_t depth_iter; + xcb_visualtype_iterator_t visual_iter; + + for (depth_iter = xcb_screen_allowed_depths_iterator(screen); + depth_iter.rem; + xcb_depth_next(&depth_iter)) { + for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data); + visual_iter.rem; + xcb_visualtype_next(&visual_iter)) { + if (screen->root_visual != visual_iter.data->visual_id) + continue; + + visual_type = visual_iter.data; + return visual_type; + } + } + + return NULL; +} + +xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr, u_int32_t *resolution, char *color) { + xcb_pixmap_t bg_pixmap = xcb_generate_id(conn); + xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root, + resolution[0], resolution[1]); + + /* Generate a Graphics Context and fill the pixmap with background color + * (for images that are smaller than your screen) */ + xcb_gcontext_t gc = xcb_generate_id(conn); + uint32_t values[] = {get_colorpixel(color)}; + xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values); + xcb_rectangle_t rect = {0, 0, resolution[0], resolution[1]}; + xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect); + xcb_free_gc(conn, gc); + + return bg_pixmap; +} + +xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color, xcb_pixmap_t pixmap) { + uint32_t mask = 0; + uint32_t values[3]; + xcb_window_t win = xcb_generate_id(conn); + + if (pixmap == XCB_NONE) { + mask |= XCB_CW_BACK_PIXEL; + values[0] = get_colorpixel(color); + } else { + mask |= XCB_CW_BACK_PIXMAP; + values[0] = pixmap; + } + + mask |= XCB_CW_OVERRIDE_REDIRECT; + values[1] = 1; + + mask |= XCB_CW_EVENT_MASK; + values[2] = XCB_EVENT_MASK_EXPOSURE | + XCB_EVENT_MASK_KEY_PRESS | + XCB_EVENT_MASK_KEY_RELEASE | + XCB_EVENT_MASK_VISIBILITY_CHANGE | + XCB_EVENT_MASK_STRUCTURE_NOTIFY; + + xcb_create_window(conn, + XCB_COPY_FROM_PARENT, + win, /* the window id */ + scr->root, /* parent == root */ + 0, 0, + scr->width_in_pixels, + scr->height_in_pixels, /* dimensions */ + 0, /* border = 0, we draw our own */ + XCB_WINDOW_CLASS_INPUT_OUTPUT, + XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */ + mask, + values); + + char *name = "i3lock"; + xcb_change_property(conn, + XCB_PROP_MODE_REPLACE, + win, + XCB_ATOM_WM_NAME, + XCB_ATOM_STRING, + 8, + strlen(name), + name); + + xcb_change_property(conn, + XCB_PROP_MODE_REPLACE, + win, + XCB_ATOM_WM_CLASS, + XCB_ATOM_STRING, + 8, + 2 * (strlen("i3lock") + 1), + "i3lock\0i3lock\0"); + + const uint32_t bypass_compositor = 1; /* disable compositing */ + _init_net_wm_bypass_compositor(conn); + xcb_change_property(conn, + XCB_PROP_MODE_REPLACE, + win, + _NET_WM_BYPASS_COMPOSITOR, + XCB_ATOM_CARDINAL, + 32, + 1, + &bypass_compositor); + + /* Map the window (= make it visible) */ + xcb_map_window(conn, win); + + /* Raise window (put it on top) */ + values[0] = XCB_STACK_MODE_ABOVE; + xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values); + + /* Ensure that the window is created and set up before returning */ + xcb_aux_sync(conn); + + return win; +} + +/* + * Repeatedly tries to grab pointer and keyboard (up to the specified number of + * tries). + * + * Returns true if the grab succeeded, false if not. + * + */ +bool grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor, int tries) { + xcb_grab_pointer_cookie_t pcookie; + xcb_grab_pointer_reply_t *preply; + + xcb_grab_keyboard_cookie_t kcookie; + xcb_grab_keyboard_reply_t *kreply; + + const suseconds_t screen_redraw_timeout = 100000; /* 100ms */ + + /* Using few variables to trigger a redraw_screen() if too many tries */ + bool redrawn = false; + struct timeval start; + if (gettimeofday(&start, NULL) == -1) { + err(EXIT_FAILURE, "gettimeofday"); + } + + while (tries-- > 0) { + pcookie = xcb_grab_pointer( + conn, + false, /* get all pointer events specified by the following mask */ + screen->root, /* grab the root window */ + XCB_NONE, /* which events to let through */ + XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */ + XCB_GRAB_MODE_ASYNC, /* keyboard mode */ + XCB_NONE, /* confine_to = in which window should the cursor stay */ + cursor, /* we change the cursor to whatever the user wanted */ + XCB_CURRENT_TIME); + + if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) && + preply->status == XCB_GRAB_STATUS_SUCCESS) { + free(preply); + break; + } + + /* In case the grab failed, we still need to free the reply */ + free(preply); + + /* Make this quite a bit slower */ + usleep(50); + + struct timeval now; + if (gettimeofday(&now, NULL) == -1) { + err(EXIT_FAILURE, "gettimeofday"); + } + + struct timeval elapsed; + timersub(&now, &start, &elapsed); + + if (!redrawn && + (tries % 100) == 0 && + elapsed.tv_usec >= screen_redraw_timeout) { + redraw_screen(); + redrawn = true; + } + } + + while (tries-- > 0) { + kcookie = xcb_grab_keyboard( + conn, + true, /* report events */ + screen->root, /* grab the root window */ + XCB_CURRENT_TIME, + XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */ + XCB_GRAB_MODE_ASYNC); + + if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) && + kreply->status == XCB_GRAB_STATUS_SUCCESS) { + free(kreply); + break; + } + + /* In case the grab failed, we still need to free the reply */ + free(kreply); + + /* Make this quite a bit slower */ + usleep(50); + + struct timeval now; + if (gettimeofday(&now, NULL) == -1) { + err(EXIT_FAILURE, "gettimeofday"); + } + + struct timeval elapsed; + timersub(&now, &start, &elapsed); + + /* Trigger a screen redraw if 100ms elapsed */ + if (!redrawn && + (tries % 100) == 0 && + elapsed.tv_usec >= screen_redraw_timeout) { + redraw_screen(); + redrawn = true; + } + } + + return (tries > 0); +} + +xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) { + xcb_pixmap_t bitmap; + xcb_pixmap_t mask; + xcb_cursor_t cursor; + + unsigned char *curs_bits; + unsigned char *mask_bits; + int curs_w, curs_h; + + switch (choice) { + case CURS_NONE: + curs_bits = curs_invisible_bits; + mask_bits = curs_invisible_bits; + curs_w = curs_invisible_width; + curs_h = curs_invisible_height; + break; + case CURS_WIN: + curs_bits = curs_windows_bits; + mask_bits = mask_windows_bits; + curs_w = curs_windows_width; + curs_h = curs_windows_height; + break; + case CURS_DEFAULT: + default: + return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */ + } + + bitmap = xcb_create_pixmap_from_bitmap_data(conn, + win, + curs_bits, + curs_w, + curs_h, + 1, + screen->white_pixel, + screen->black_pixel, + NULL); + + mask = xcb_create_pixmap_from_bitmap_data(conn, + win, + mask_bits, + curs_w, + curs_h, + 1, + screen->white_pixel, + screen->black_pixel, + NULL); + + cursor = xcb_generate_id(conn); + + xcb_create_cursor(conn, + cursor, + bitmap, + mask, + 65535, 65535, 65535, + 0, 0, 0, + 0, 0); + + xcb_free_pixmap(conn, bitmap); + xcb_free_pixmap(conn, mask); + + return cursor; +} + +static xcb_atom_t _NET_ACTIVE_WINDOW = XCB_NONE; +void _init_net_active_window(xcb_connection_t *conn) { + if (_NET_ACTIVE_WINDOW != XCB_NONE) { + /* already initialized */ + return; + } + xcb_generic_error_t *err; + xcb_intern_atom_reply_t *atom_reply = xcb_intern_atom_reply( + conn, + xcb_intern_atom(conn, 0, strlen("_NET_ACTIVE_WINDOW"), "_NET_ACTIVE_WINDOW"), + &err); + if (atom_reply == NULL) { + fprintf(stderr, "X11 Error %d\n", err->error_code); + free(err); + return; + } + _NET_ACTIVE_WINDOW = atom_reply->atom; + free(atom_reply); +} + +xcb_window_t find_focused_window(xcb_connection_t *conn, const xcb_window_t root) { + xcb_window_t result = XCB_NONE; + + _init_net_active_window(conn); + + xcb_get_property_reply_t *prop_reply = xcb_get_property_reply( + conn, + xcb_get_property_unchecked( + conn, false, root, _NET_ACTIVE_WINDOW, XCB_GET_PROPERTY_TYPE_ANY, 0, 1 /* word */), + NULL); + if (prop_reply == NULL) { + goto out; + } + if (xcb_get_property_value_length(prop_reply) == 0) { + goto out_prop; + } + if (prop_reply->type != XCB_ATOM_WINDOW) { + goto out_prop; + } + + result = *((xcb_window_t *)xcb_get_property_value(prop_reply)); + +out_prop: + free(prop_reply); +out: + return result; +} + +void set_focused_window(xcb_connection_t *conn, const xcb_window_t root, const xcb_window_t window) { + xcb_client_message_event_t ev; + memset(&ev, '\0', sizeof(xcb_client_message_event_t)); + + _init_net_active_window(conn); + + ev.response_type = XCB_CLIENT_MESSAGE; + ev.window = window; + ev.type = _NET_ACTIVE_WINDOW; + ev.format = 32; + ev.data.data32[0] = 2; /* 2 = pager */ + + xcb_send_event(conn, false, root, XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT, (char *)&ev); + xcb_flush(conn); +} -- cgit v1.3