gri3-wm/src/client.c

/*
 * vim:ts=8:expandtab
 *
 * i3 - an improved dynamic tiling window manager
 *
 * © 2009 Michael Stapelberg and contributors
 *
 * See file LICENSE for license information.
 *
 * client.c: holds all client-specific functions
 *
 */
#include <stdlib.h>
#include <string.h>
#include <assert.h>

#include <xcb/xcb.h>
#include <xcb/xcb_icccm.h>

#include "data.h"
#include "i3.h"
#include "xcb.h"
#include "util.h"
#include "queue.h"
#include "layout.h"

/*
 * Removes the given client from the container, either because it will be inserted into another
 * one or because it was unmapped
 *
 */
void client_remove_from_container(xcb_connection_t *conn, Client *client, Container *container, bool remove_from_focusstack) {
        CIRCLEQ_REMOVE(&(container->clients), client, clients);

        if (remove_from_focusstack)
                SLIST_REMOVE(&(container->workspace->focus_stack), client, Client, focus_clients);

        /* If the container will be empty now and is in stacking mode, we need to
           unmap the stack_win */
        if (CIRCLEQ_EMPTY(&(container->clients)) && container->mode == MODE_STACK) {
                struct Stack_Window *stack_win = &(container->stack_win);
                stack_win->rect.height = 0;
                xcb_unmap_window(conn, stack_win->window);
        }
}

/*
 * Warps the pointer into the given client (in the middle of it, to be specific), therefore
 * selecting it
 *
 */
void client_warp_pointer_into(xcb_connection_t *conn, Client *client) {
        int mid_x = client->rect.width / 2,
            mid_y = client->rect.height / 2;
        xcb_warp_pointer(conn, XCB_NONE, client->child, 0, 0, 0, 0, mid_x, mid_y);
}

/*
 * Returns true if the client supports the given protocol atom (like WM_DELETE_WINDOW)
 *
 */
static bool client_supports_protocol(xcb_connection_t *conn, Client *client, xcb_atom_t atom) {
        xcb_get_property_cookie_t cookie;
        xcb_get_wm_protocols_reply_t protocols;
        bool result = false;

        cookie = xcb_get_wm_protocols_unchecked(conn, client->child, atoms[WM_PROTOCOLS]);
        if (xcb_get_wm_protocols_reply(conn, cookie, &protocols, NULL) != 1)
                return false;

        /* Check if the client’s protocols have the requested atom set */
        for (uint32_t i = 0; i < protocols.atoms_len; i++)
                if (protocols.atoms[i] == atom)
                        result = true;

        xcb_get_wm_protocols_reply_wipe(&protocols);

        return result;
}

/*
 * Kills the given window using WM_DELETE_WINDOW or xcb_kill_window
 *
 */
void client_kill(xcb_connection_t *conn, Client *window) {
        /* If the client does not support WM_DELETE_WINDOW, we kill it the hard way */
        if (!client_supports_protocol(conn, window, atoms[WM_DELETE_WINDOW])) {
                LOG("Killing window the hard way\n");
                xcb_kill_client(conn, window->child);
                return;
        }

        xcb_client_message_event_t ev;

        memset(&ev, 0, sizeof(xcb_client_message_event_t));

        ev.response_type = XCB_CLIENT_MESSAGE;
        ev.window = window->child;
        ev.type = atoms[WM_PROTOCOLS];
        ev.format = 32;
        ev.data.data32[0] = atoms[WM_DELETE_WINDOW];
        ev.data.data32[1] = XCB_CURRENT_TIME;

        LOG("Sending WM_DELETE to the client\n");
        xcb_send_event(conn, false, window->child, XCB_EVENT_MASK_NO_EVENT, (char*)&ev);
        xcb_flush(conn);
}

/*
 * Checks if the given window class and title match the given client
 * Window title is passed as "normal" string and as UCS-2 converted string for
 * matching _NET_WM_NAME capable clients as well as those using legacy hints.
 *
 */
bool client_matches_class_name(Client *client, char *to_class, char *to_title,
                               char *to_title_ucs, int to_title_ucs_len) {
        /* Check if the given class is part of the window class */
        if (strcasestr(client->window_class, to_class) == NULL)
                return false;

        /* If no title was given, we’re done */
        if (to_title == NULL)
                return true;

        if (client->name_len > -1) {
                /* UCS-2 converted window titles */
                if (memmem(client->name, (client->name_len * 2), to_title_ucs, (to_title_ucs_len * 2)) == NULL)
                        return false;
        } else {
                /* Legacy hints */
                if (strcasestr(client->name, to_title) == NULL)
                        return false;
        }

        return true;
}

/*
 * Toggles fullscreen mode for the given client. It updates the data structures and
 * reconfigures (= resizes/moves) the client and its frame to the full size of the
 * screen. When leaving fullscreen, re-rendering the layout is forced.
 *
 */
void client_toggle_fullscreen(xcb_connection_t *conn, Client *client) {
        /* dock clients cannot enter fullscreen mode */
        assert(!client->dock);

        Workspace *workspace = client->workspace;

        if (!client->fullscreen) {
                if (workspace->fullscreen_client != NULL) {
                        LOG("Not entering fullscreen mode, there already is a fullscreen client.\n");
                        return;
                }
                client->fullscreen = true;
                workspace->fullscreen_client = client;
                LOG("Entering fullscreen mode...\n");
                /* We just entered fullscreen mode, let’s configure the window */
                uint32_t mask = XCB_CONFIG_WINDOW_X |
                                XCB_CONFIG_WINDOW_Y |
                                XCB_CONFIG_WINDOW_WIDTH |
                                XCB_CONFIG_WINDOW_HEIGHT;
                uint32_t values[4] = {workspace->rect.x,
                                      workspace->rect.y,
                                      workspace->rect.width,
                                      workspace->rect.height};

                LOG("child itself will be at %dx%d with size %dx%d\n",
                                values[0], values[1], values[2], values[3]);

                xcb_configure_window(conn, client->frame, mask, values);

                /* Child’s coordinates are relative to the parent (=frame) */
                values[0] = 0;
                values[1] = 0;
                xcb_configure_window(conn, client->child, mask, values);

                /* Raise the window */
                values[0] = XCB_STACK_MODE_ABOVE;
                xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_STACK_MODE, values);

                Rect child_rect = workspace->rect;
                child_rect.x = child_rect.y = 0;
                fake_configure_notify(conn, child_rect, client->child);
        } else {
                LOG("leaving fullscreen mode\n");
                client->fullscreen = false;
                workspace->fullscreen_client = NULL;
                if (client->floating >= FLOATING_AUTO_ON) {
                        /* For floating clients it’s enough if we just reconfigure that window (in fact,
                         * re-rendering the layout will not update the client.) */
                        reposition_client(conn, client);
                        resize_client(conn, client);
                        /* redecorate_window flushes */
                        redecorate_window(conn, client);
                } else {
                        /* Because the coordinates of the window haven’t changed, it would not be
                           re-configured if we don’t set the following flag */
                        client->force_reconfigure = true;
                        /* We left fullscreen mode, redraw the whole layout to ensure enternotify events are disabled */
                        render_layout(conn);
                }
        }

        xcb_flush(conn);
}