Oh my fucking god, fuck xcb and X
Some windows have WM_NAME of 0 bytes, so I have to ask for _NET_WM_NAME Atom, but some windows have it as XCB_ATOM_STRING and most of them have it as UTF8_STRING, so I'm just reading UTF-8 one. And ALSO coordinates from xcb_get_geometry are relative to the parent, so I have to translate them using xcb_translate_coordinates, which would be fine, except it completely kills my "queue a bunch of requests and read responses later" paradigm here. Hence, I'm doing it one. by. one. Fuck this shit.
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a5cf7cabf3
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GPG Key ID:
F0F6CFE11CDB0960
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@ -1,16 +1,20 @@
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CFLAGS += -Wall -Wextra `exec pkg-config --cflags raylib xcb xcb-composite`
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CFLAGS += -Wall -Wextra -Wpedantic -Werror `exec pkg-config --cflags raylib xcb xcb-composite`
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LDFLAGS := -lm `pkg-config --libs raylib xcb xcb-composite`
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OBJECTS = ./screenshot.o ./windowtree.o
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scrall: main.c $(OBJECTS)
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scrall: $(OBJECTS) main.c
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$(CC) $(CFLAGS) main.c $(LDFLAGS) -o scrall $(OBJECTS)
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%.o: %.c
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$(CC) $(CFLAGS) -c $^ -o $@
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clean:
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$(RM) scrall
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$(RM) scrall $(OBJECTS)
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debug:
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make CFLAGS+=-ggdb
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gdb ./scrall
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run: scrall
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./scrall
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@ -1,6 +1,7 @@
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// x-run: make run
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#include <raylib.h>
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#include <stdio.h>
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#include <string.h>
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#include <xcb/xcb.h>
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#include <xcb/xproto.h>
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#include "screenshot.h"
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@ -19,20 +20,30 @@ int main(int argc, char **argv) {
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size_t n_windows;
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struct window_info *windows = get_windows_list(xcb, &n_windows);
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for (int i = 0; i < n_windows; i++) {
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printf("0x%08x %02x %s\n", windows[i].wid, windows[i].win_gravity, windows[i].title);
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}
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xcb_disconnect(xcb);
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return 0;
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SetConfigFlags(FLAG_WINDOW_TRANSPARENT);
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SetConfigFlags(FLAG_WINDOW_TRANSPARENT | FLAG_WINDOW_RESIZABLE);
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InitWindow(0, 0, "img/scrall");
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Font font = LoadFontEx("/usr/share/fonts/Unifont/Unifont.ttf", 16, 0, 1024);
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while (!WindowShouldClose()) {
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BeginDrawing();
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ClearBackground(BLANK);
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ClearBackground(Fade(BLACK, 0.9));
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for (size_t i = 0; i < n_windows; i++) {
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DrawTextEx(font,
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TextFormat("0x%08x %dx%d+%d+%d %s\n",
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windows[i].wid,
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windows[i].rect.width,
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windows[i].rect.height,
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windows[i].rect.x,
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windows[i].rect.y,
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windows[i].title),
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(Vector2) { 8, 8 + 18 * i }, 16, 0, WHITE);
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}
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EndDrawing();
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}
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UnloadFont(font);
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}
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@ -6,51 +6,20 @@
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#include <xcb/xcb.h>
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#include <xcb/xproto.h>
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struct _cookies_container {
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xcb_get_property_cookie_t gp_cookie;
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xcb_get_geometry_cookie_t gg_cookie;
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xcb_get_window_attributes_cookie_t ga_cookie;
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};
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struct window_info *get_windows_list(xcb_connection_t *conn, size_t *n_windows) {
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xcb_generic_error_t *err;
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xcb_screen_t *screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
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#if 0
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xcb_query_tree_reply_t *qt_reply;
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xcb_query_tree_cookie_t qt_cookie = xcb_query_tree(conn, screen->root);
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if (!(qt_reply = xcb_query_tree_reply(conn, qt_cookie, &err))) {
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fprintf(stderr, "xcb: error: xcb_query_tree_reply: %d\n", err->error_code);
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return NULL;
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}
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xcb_window_t *children = xcb_query_tree_children(qt_reply);
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*n_windows = xcb_query_tree_children_length(qt_reply);
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struct window_info *windows = calloc(*n_windows, sizeof(struct window_info));
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#else
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xcb_intern_atom_cookie_t ia_cookie = xcb_intern_atom(conn, 1, 16, "_NET_CLIENT_LIST");
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xcb_intern_atom_reply_t *ia_reply = xcb_intern_atom_reply(conn, ia_cookie, &err);
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enum xcb_atom_enum_t at_list = XCB_ATOM_WINDOW;
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/*if (!ia_reply) {*/
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/* printf("using _WIN_CLIENT_LIST\n");*/
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/* ia_cookie = xcb_intern_atom(conn, 1, 16, "_WIN_CLIENT_LIST");*/
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/* ia_reply = xcb_intern_atom_reply(conn, ia_cookie, &err);*/
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/* at_list = XCB_ATOM_CARDINAL;*/
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/*}*/
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if (!ia_reply) {
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fprintf(stderr, "xcb: error: xcb_intern_atom_reply: %d\n", err->error_code);
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return NULL;
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}
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xcb_get_property_cookie_t gp_client_list_cookie = xcb_get_property(conn, 0, screen->root, ia_reply->atom, at_list, 0, 1024);
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free(ia_reply);
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xcb_get_property_cookie_t gp_client_list_cookie = xcb_get_property(conn, 0, screen->root, ia_reply->atom, XCB_ATOM_WINDOW, 0, (uint32_t)~0UL);
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xcb_get_property_reply_t *gp_client_list_reply = xcb_get_property_reply(conn, gp_client_list_cookie, &err);
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@ -59,35 +28,51 @@ struct window_info *get_windows_list(xcb_connection_t *conn, size_t *n_windows)
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return NULL;
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}
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*n_windows = xcb_get_property_value_length(gp_client_list_reply);
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printf("length: %zu\n", *n_windows);
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*n_windows = xcb_get_property_value_length(gp_client_list_reply) / sizeof(xcb_window_t);
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struct window_info *windows = calloc(*n_windows, sizeof(struct window_info));
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xcb_window_t *child = (xcb_window_t *)xcb_get_property_value(gp_client_list_reply);
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xcb_window_t *child = xcb_get_property_value(gp_client_list_reply);
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for (int i = 0; i < *n_windows; i++) {
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printf("WID 0x%08d\n", child[i]);
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for (size_t i = 0; i < *n_windows; i++) {
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windows[i].wid = child[i];
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}
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free(ia_reply);
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free(gp_client_list_reply);
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#endif
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// Get atom: UTF8_STRING {{{
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ia_cookie = xcb_intern_atom(conn, 1, 11, "UTF8_STRING");
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ia_reply = xcb_intern_atom_reply(conn, ia_cookie, &err);
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struct _cookies_container *cookies = calloc(*n_windows, sizeof(struct _cookies_container));
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// queueing requests
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for (int i = 0; i < *n_windows; i++) {
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cookies[i].gp_cookie = xcb_get_property(conn, 0, windows[i].wid, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 0, 1023);
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cookies[i].gg_cookie = xcb_get_geometry(conn, windows[i].wid);
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cookies[i].ga_cookie = xcb_get_window_attributes(conn, windows[i].wid);
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if (!ia_reply) {
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fprintf(stderr, "xcb: error: xcb_intern_atom(UTF8_STRING): %d\n", err->error_code);
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return NULL;
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}
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// reading results
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for (int i = 0; i < *n_windows; i++) {
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xcb_get_geometry_reply_t *gg_reply = xcb_get_geometry_reply(conn, cookies[i].gg_cookie, &err);
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xcb_atom_t atom_utf8_string = ia_reply->atom;
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free(ia_reply);
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// }}}
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// Get atom: _NET_WM_NAME {{{
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ia_cookie = xcb_intern_atom(conn, 1, 12, "_NET_WM_NAME");
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ia_reply = xcb_intern_atom_reply(conn, ia_cookie, &err);
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if (!ia_reply) {
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fprintf(stderr, "xcb: error: xcb_intern_atom(_NET_WM_NAME): %d\n", err->error_code);
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return NULL;
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}
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xcb_atom_t atom_net_wm_name = ia_reply->atom;
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free(ia_reply);
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// }}}
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for (size_t i = 0; i < *n_windows; i++) {
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// Getting geometry {{{
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xcb_get_geometry_cookie_t gg_cookie = xcb_get_geometry(conn, windows[i].wid);
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xcb_get_geometry_reply_t *gg_reply = xcb_get_geometry_reply(conn, gg_cookie, &err);
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if (!gg_reply) {
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fprintf(stderr, "xcb: error: xcb_get_geometry: %d\n", err->error_code);
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goto failure;
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return NULL;
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}
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windows[i].rect.x = gg_reply->x;
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windows[i].rect.height = gg_reply->height;
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free(gg_reply);
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// }}}
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xcb_get_property_reply_t *gp_reply = xcb_get_property_reply(conn, cookies[i].gp_cookie, &err);
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// Translating geometry {{{
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xcb_translate_coordinates_cookie_t tc_cookie = xcb_translate_coordinates(conn, windows[i].wid, screen->root, windows[i].rect.x, windows[i].rect.y);
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xcb_translate_coordinates_reply_t *tc_reply = xcb_translate_coordinates_reply(conn, tc_cookie, &err);
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if (!tc_reply) {
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fprintf(stderr, "xcb: error: xcb_translate_coordinates: %d\n", err->error_code);
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return NULL;
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}
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windows[i].rect.x = tc_reply->dst_x;
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windows[i].rect.y = tc_reply->dst_y;
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free(tc_reply);
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// }}}
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// Getting name: {{{
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xcb_get_property_cookie_t gp_cookie = xcb_get_property(conn, 0, windows[i].wid, atom_net_wm_name, atom_utf8_string, 0, 1024);
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xcb_get_property_reply_t *gp_reply = xcb_get_property_reply(conn, gp_cookie, &err);
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if (!gp_reply) {
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fprintf(stderr, "xcb: error: xcb_get_property: %d\n", err->error_code);
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goto failure;
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return NULL;
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}
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char *gp_value = (char *)xcb_get_property_value(gp_reply);
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strncpy(windows[i].title, gp_value, 1023);
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free(gp_reply);
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xcb_get_window_attributes_reply_t *ga_reply = xcb_get_window_attributes_reply(conn, cookies[i].ga_cookie, &err);
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if (!gp_reply) {
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fprintf(stderr, "xcb: error: xcb_get_window_attributes: %d\n", err->error_code);
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goto failure;
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// }}}
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}
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// }}}
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windows[i].win_gravity = ga_reply->win_gravity;
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free(ga_reply);
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}
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free(cookies); // yay!
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return windows; // ewww
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failure:
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free(cookies);
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return NULL;
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}
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@ -11,7 +11,6 @@ struct window_info {
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xcb_window_t wid;
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xcb_rectangle_t rect;
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char title[1024];
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uint8_t win_gravity;
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};
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struct window_info *get_windows_list(xcb_connection_t *conn, size_t *n_windows);
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