Initial commit.
This commit is contained in:
Storm Dragon
@@ -0,0 +1,435 @@
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/*
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* vim:ts=4:sw=4:expandtab
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*
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* © 2010 Michael Stapelberg
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*
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* xcb.c: contains all functions which use XCB to talk to X11. Mostly wrappers
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* around the rather complicated/ugly parts of the XCB API.
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*
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*/
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#include <xcb/xcb.h>
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#include <xcb/xcb_image.h>
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#include <xcb/xcb_atom.h>
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#include <xcb/xcb_aux.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <string.h>
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#include <unistd.h>
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#include <assert.h>
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#include <err.h>
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#include <time.h>
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#include <sys/time.h>
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#include "cursors.h"
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#include "unlock_indicator.h"
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extern auth_state_t auth_state;
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xcb_connection_t *conn;
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xcb_screen_t *screen;
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static xcb_atom_t _NET_WM_BYPASS_COMPOSITOR = XCB_NONE;
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void _init_net_wm_bypass_compositor(xcb_connection_t *conn) {
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if (_NET_WM_BYPASS_COMPOSITOR != XCB_NONE) {
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/* already initialized */
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return;
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}
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xcb_generic_error_t *err;
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xcb_intern_atom_reply_t *atom_reply = xcb_intern_atom_reply(
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conn,
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xcb_intern_atom(conn, 0, strlen("_NET_WM_BYPASS_COMPOSITOR"), "_NET_WM_BYPASS_COMPOSITOR"),
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&err);
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if (atom_reply == NULL) {
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fprintf(stderr, "X11 Error %d\n", err->error_code);
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free(err);
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return;
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}
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_NET_WM_BYPASS_COMPOSITOR = atom_reply->atom;
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free(atom_reply);
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}
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#define curs_invisible_width 8
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#define curs_invisible_height 8
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static unsigned char curs_invisible_bits[] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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#define curs_windows_width 11
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#define curs_windows_height 19
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static unsigned char curs_windows_bits[] = {
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0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07, 0xde, 0x07,
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0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05, 0x3e, 0x00, 0xb6, 0x07,
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0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06, 0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05,
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0x7f, 0x06};
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#define mask_windows_width 11
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#define mask_windows_height 19
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static unsigned char mask_windows_bits[] = {
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0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00, 0x3f, 0x00,
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0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03, 0xff, 0x07, 0x7f, 0x00,
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0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01, 0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03,
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0x80, 0x01};
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static uint32_t get_colorpixel(char *hex) {
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char strgroups[3][3] = {{hex[0], hex[1], '\0'},
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{hex[2], hex[3], '\0'},
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{hex[4], hex[5], '\0'}};
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uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
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(strtol(strgroups[1], NULL, 16)),
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(strtol(strgroups[2], NULL, 16))};
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return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
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}
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xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
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xcb_visualtype_t *visual_type = NULL;
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xcb_depth_iterator_t depth_iter;
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xcb_visualtype_iterator_t visual_iter;
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for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
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depth_iter.rem;
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xcb_depth_next(&depth_iter)) {
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for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
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visual_iter.rem;
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xcb_visualtype_next(&visual_iter)) {
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if (screen->root_visual != visual_iter.data->visual_id) {
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continue;
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}
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visual_type = visual_iter.data;
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return visual_type;
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}
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}
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return NULL;
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}
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xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr, u_int32_t *resolution, char *color) {
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xcb_pixmap_t bg_pixmap = xcb_generate_id(conn);
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xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root,
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resolution[0], resolution[1]);
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/* Generate a Graphics Context and fill the pixmap with background color
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* (for images that are smaller than your screen) */
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xcb_gcontext_t gc = xcb_generate_id(conn);
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uint32_t values[] = {get_colorpixel(color)};
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xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values);
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xcb_rectangle_t rect = {0, 0, resolution[0], resolution[1]};
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xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect);
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xcb_free_gc(conn, gc);
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return bg_pixmap;
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}
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xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr, char *color, xcb_pixmap_t pixmap) {
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uint32_t mask = 0;
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uint32_t values[3];
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xcb_window_t win = xcb_generate_id(conn);
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if (pixmap == XCB_NONE) {
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mask |= XCB_CW_BACK_PIXEL;
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values[0] = get_colorpixel(color);
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} else {
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mask |= XCB_CW_BACK_PIXMAP;
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values[0] = pixmap;
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}
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mask |= XCB_CW_OVERRIDE_REDIRECT;
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values[1] = 1;
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mask |= XCB_CW_EVENT_MASK;
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values[2] = XCB_EVENT_MASK_EXPOSURE |
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XCB_EVENT_MASK_KEY_PRESS |
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XCB_EVENT_MASK_KEY_RELEASE |
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XCB_EVENT_MASK_VISIBILITY_CHANGE |
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XCB_EVENT_MASK_STRUCTURE_NOTIFY;
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xcb_create_window(conn,
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XCB_COPY_FROM_PARENT,
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win, /* the window id */
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scr->root, /* parent == root */
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0, 0,
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scr->width_in_pixels,
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scr->height_in_pixels, /* dimensions */
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0, /* border = 0, we draw our own */
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XCB_WINDOW_CLASS_INPUT_OUTPUT,
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XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
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mask,
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values);
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char *name = "i38lock";
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xcb_change_property(conn,
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XCB_PROP_MODE_REPLACE,
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win,
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XCB_ATOM_WM_NAME,
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XCB_ATOM_STRING,
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8,
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strlen(name),
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name);
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xcb_change_property(conn,
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XCB_PROP_MODE_REPLACE,
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win,
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XCB_ATOM_WM_CLASS,
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XCB_ATOM_STRING,
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8,
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2 * (strlen("i38lock") + 1),
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"i38lock\0i38lock\0");
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const uint32_t bypass_compositor = 1; /* disable compositing */
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_init_net_wm_bypass_compositor(conn);
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xcb_change_property(conn,
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XCB_PROP_MODE_REPLACE,
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win,
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_NET_WM_BYPASS_COMPOSITOR,
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XCB_ATOM_CARDINAL,
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32,
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1,
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&bypass_compositor);
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/* Map the window (= make it visible) */
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xcb_map_window(conn, win);
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/* Raise window (put it on top) */
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values[0] = XCB_STACK_MODE_ABOVE;
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xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
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/* Ensure that the window is created and set up before returning */
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xcb_aux_sync(conn);
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return win;
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}
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/*
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* Repeatedly tries to grab pointer and keyboard (up to the specified number of
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* tries).
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*
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* Returns true if the grab succeeded, false if not.
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*
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*/
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bool grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor, int tries) {
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xcb_grab_pointer_cookie_t pcookie;
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xcb_grab_pointer_reply_t *preply;
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xcb_grab_keyboard_cookie_t kcookie;
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xcb_grab_keyboard_reply_t *kreply;
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const suseconds_t screen_redraw_timeout = 100000; /* 100ms */
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/* Using few variables to trigger a redraw_screen() if too many tries */
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bool redrawn = false;
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struct timeval start;
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if (gettimeofday(&start, NULL) == -1) {
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err(EXIT_FAILURE, "gettimeofday");
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}
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while (tries-- > 0) {
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pcookie = xcb_grab_pointer(
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conn,
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false, /* get all pointer events specified by the following mask */
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screen->root, /* grab the root window */
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XCB_NONE, /* which events to let through */
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XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
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XCB_GRAB_MODE_ASYNC, /* keyboard mode */
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XCB_NONE, /* confine_to = in which window should the cursor stay */
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cursor, /* we change the cursor to whatever the user wanted */
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XCB_CURRENT_TIME);
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if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
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preply->status == XCB_GRAB_STATUS_SUCCESS) {
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free(preply);
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break;
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}
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/* In case the grab failed, we still need to free the reply */
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free(preply);
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/* Make this quite a bit slower */
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usleep(50);
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struct timeval now;
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if (gettimeofday(&now, NULL) == -1) {
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err(EXIT_FAILURE, "gettimeofday");
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}
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struct timeval elapsed;
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timersub(&now, &start, &elapsed);
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if (!redrawn &&
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(tries % 100) == 0 &&
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elapsed.tv_usec >= screen_redraw_timeout) {
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redraw_screen();
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redrawn = true;
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}
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}
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while (tries-- > 0) {
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kcookie = xcb_grab_keyboard(
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conn,
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true, /* report events */
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screen->root, /* grab the root window */
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XCB_CURRENT_TIME,
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XCB_GRAB_MODE_ASYNC, /* process events as normal, do not require sync */
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XCB_GRAB_MODE_ASYNC);
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if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
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kreply->status == XCB_GRAB_STATUS_SUCCESS) {
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free(kreply);
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break;
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}
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/* In case the grab failed, we still need to free the reply */
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free(kreply);
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/* Make this quite a bit slower */
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usleep(50);
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struct timeval now;
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if (gettimeofday(&now, NULL) == -1) {
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err(EXIT_FAILURE, "gettimeofday");
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}
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struct timeval elapsed;
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timersub(&now, &start, &elapsed);
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/* Trigger a screen redraw if 100ms elapsed */
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if (!redrawn &&
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(tries % 100) == 0 &&
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elapsed.tv_usec >= screen_redraw_timeout) {
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redraw_screen();
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redrawn = true;
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}
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}
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return (tries > 0);
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}
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xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen, xcb_window_t win, int choice) {
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xcb_pixmap_t bitmap;
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xcb_pixmap_t mask;
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xcb_cursor_t cursor;
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unsigned char *curs_bits;
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unsigned char *mask_bits;
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int curs_w, curs_h;
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switch (choice) {
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case CURS_NONE:
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curs_bits = curs_invisible_bits;
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mask_bits = curs_invisible_bits;
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curs_w = curs_invisible_width;
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curs_h = curs_invisible_height;
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break;
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case CURS_WIN:
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curs_bits = curs_windows_bits;
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mask_bits = mask_windows_bits;
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curs_w = curs_windows_width;
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curs_h = curs_windows_height;
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break;
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case CURS_DEFAULT:
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default:
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return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change the cursor" */
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}
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bitmap = xcb_create_pixmap_from_bitmap_data(conn,
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win,
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curs_bits,
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curs_w,
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curs_h,
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1,
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screen->white_pixel,
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screen->black_pixel,
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NULL);
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mask = xcb_create_pixmap_from_bitmap_data(conn,
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win,
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mask_bits,
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curs_w,
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curs_h,
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1,
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screen->white_pixel,
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screen->black_pixel,
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NULL);
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cursor = xcb_generate_id(conn);
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xcb_create_cursor(conn,
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cursor,
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bitmap,
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mask,
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65535, 65535, 65535,
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0, 0, 0,
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0, 0);
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xcb_free_pixmap(conn, bitmap);
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xcb_free_pixmap(conn, mask);
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return cursor;
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}
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static xcb_atom_t _NET_ACTIVE_WINDOW = XCB_NONE;
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void _init_net_active_window(xcb_connection_t *conn) {
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if (_NET_ACTIVE_WINDOW != XCB_NONE) {
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/* already initialized */
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return;
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}
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xcb_generic_error_t *err;
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xcb_intern_atom_reply_t *atom_reply = xcb_intern_atom_reply(
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conn,
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xcb_intern_atom(conn, 0, strlen("_NET_ACTIVE_WINDOW"), "_NET_ACTIVE_WINDOW"),
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&err);
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if (atom_reply == NULL) {
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fprintf(stderr, "X11 Error %d\n", err->error_code);
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free(err);
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return;
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}
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_NET_ACTIVE_WINDOW = atom_reply->atom;
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free(atom_reply);
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}
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xcb_window_t find_focused_window(xcb_connection_t *conn, const xcb_window_t root) {
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xcb_window_t result = XCB_NONE;
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_init_net_active_window(conn);
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xcb_get_property_reply_t *prop_reply = xcb_get_property_reply(
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conn,
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xcb_get_property_unchecked(
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conn, false, root, _NET_ACTIVE_WINDOW, XCB_GET_PROPERTY_TYPE_ANY, 0, 1 /* word */),
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NULL);
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if (prop_reply == NULL) {
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goto out;
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}
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if (xcb_get_property_value_length(prop_reply) == 0) {
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goto out_prop;
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}
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if (prop_reply->type != XCB_ATOM_WINDOW) {
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goto out_prop;
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}
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result = *((xcb_window_t *)xcb_get_property_value(prop_reply));
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out_prop:
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free(prop_reply);
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out:
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return result;
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}
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void set_focused_window(xcb_connection_t *conn, const xcb_window_t root, const xcb_window_t window) {
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xcb_client_message_event_t ev;
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memset(&ev, '\0', sizeof(xcb_client_message_event_t));
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_init_net_active_window(conn);
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ev.response_type = XCB_CLIENT_MESSAGE;
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ev.window = window;
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ev.type = _NET_ACTIVE_WINDOW;
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ev.format = 32;
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ev.data.data32[0] = 2; /* 2 = pager */
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xcb_send_event(conn, false, root, XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT, (char *)&ev);
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xcb_flush(conn);
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}
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