289 lines
10 KiB
C
289 lines
10 KiB
C
/*
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* vim:ts=8:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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*
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* © 2009 Michael Stapelberg and contributors
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*
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* See file LICENSE for license information.
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*
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* util.c: Utility functions, which can be useful everywhere.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <stdarg.h>
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#include <assert.h>
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#include "i3.h"
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#include "data.h"
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#include "table.h"
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#include "layout.h"
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#include "util.h"
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#include "xcb.h"
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int min(int a, int b) {
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return (a < b ? a : b);
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}
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int max(int a, int b) {
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return (a > b ? a : b);
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}
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/*
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* Prints the message (see printf()) to stderr, then exits the program.
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*
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*/
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void die(char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vfprintf(stderr, fmt, args);
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va_end(args);
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exit(EXIT_FAILURE);
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}
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/*
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* The s* functions (safe) are wrappers around malloc, strdup, …, which exits if one of
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* the called functions returns NULL, meaning that there is no more memory available
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*
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*/
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void *smalloc(size_t size) {
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void *result = malloc(size);
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exit_if_null(result, "Too less memory for malloc(%d)\n", size);
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return result;
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}
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void *scalloc(size_t size) {
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void *result = calloc(size, 1);
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exit_if_null(result, "Too less memory for calloc(%d)\n", size);
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return result;
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}
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char *sstrdup(const char *str) {
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char *result = strdup(str);
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exit_if_null(result, "Too less memory for strdup()\n");
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return result;
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}
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/*
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* Starts the given application by passing it through a shell. We use double fork
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* to avoid zombie processes. As the started application’s parent exits (immediately),
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* the application is reparented to init (process-id 1), which correctly handles
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* childs, so we don’t have to do it :-).
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*
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* The shell is determined by looking for the SHELL environment variable. If it
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* does not exist, /bin/sh is used.
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*
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*/
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void start_application(const char *command) {
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if (fork() == 0) {
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/* Child process */
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if (fork() == 0) {
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/* Stores the path of the shell */
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static const char *shell = NULL;
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if (shell == NULL)
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if ((shell = getenv("SHELL")) == NULL)
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shell = "/bin/sh";
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/* This is the child */
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execl(shell, shell, "-c", command, NULL);
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/* not reached */
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}
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exit(0);
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}
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wait(0);
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}
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/*
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* Checks a generic cookie for errors and quits with the given message if there
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* was an error.
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*
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*/
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void check_error(xcb_connection_t *connection, xcb_void_cookie_t cookie, char *err_message) {
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xcb_generic_error_t *error = xcb_request_check(connection, cookie);
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if (error != NULL) {
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fprintf(stderr, "ERROR: %s : %d\n", err_message , error->error_code);
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xcb_disconnect(connection);
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exit(-1);
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}
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}
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/*
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* Sets the given client as focused by updating the data structures correctly,
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* updating the X input focus and finally re-decorating both windows (to signalize
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* the user the new focus situation)
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*
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*/
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void set_focus(xcb_connection_t *conn, Client *client) {
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/* The dock window cannot be focused */
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/* TODO: does this play well with dzen2’s popup menus? or do we just need to set the input
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focus but not update our internal structures? */
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if (client->dock)
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return;
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/* TODO: check if the focus needs to be changed at all */
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/* Store current_row/current_col */
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c_ws->current_row = current_row;
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c_ws->current_col = current_col;
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c_ws = client->container->workspace;
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/* Update container */
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Client *old_client = client->container->currently_focused;
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client->container->currently_focused = client;
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current_col = client->container->col;
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current_row = client->container->row;
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/* Set focus to the entered window, and flush xcb buffer immediately */
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xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, client->child, XCB_CURRENT_TIME);
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//xcb_warp_pointer(conn, XCB_NONE, client->child, 0, 0, 0, 0, 10, 10);
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/* Update last/current client’s titlebar */
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if (old_client != NULL)
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decorate_window(conn, old_client, old_client->frame, old_client->titlegc, 0);
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decorate_window(conn, client, client->frame, client->titlegc, 0);
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/* If we’re in stacking mode, we render the container to update changes in the title
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bars and raise the focused client */
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if (client->container->mode == MODE_STACK) {
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render_container(conn, client->container);
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uint32_t values[] = { XCB_STACK_MODE_ABOVE };
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xcb_configure_window(conn, client->frame,
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XCB_CONFIG_WINDOW_STACK_MODE, values);
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}
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xcb_flush(conn);
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}
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/*
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* Switches the layout of the given container taking care of the necessary house-keeping
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*
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*/
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void switch_layout_mode(xcb_connection_t *conn, Container *container, int mode) {
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if (mode == MODE_STACK) {
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/* When entering stacking mode, we need to open a window on which we can draw the
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title bars of the clients, it has height 1 because we don’t bother here with
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calculating the correct height - it will be adjusted when rendering anyways. */
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Rect rect = {container->x, container->y, container->width, 1 };
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uint32_t mask = 0;
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uint32_t values[2];
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/* Don’t generate events for our new window, it should *not* be managed */
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mask |= XCB_CW_OVERRIDE_REDIRECT;
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values[0] = 1;
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/* We want to know when… */
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mask |= XCB_CW_EVENT_MASK;
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values[1] = XCB_EVENT_MASK_BUTTON_PRESS | /* …mouse is pressed */
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XCB_EVENT_MASK_EXPOSURE; /* …our window needs to be redrawn */
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struct Stack_Window *stack_win = &(container->stack_win);
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stack_win->window = create_window(conn, rect, XCB_WINDOW_CLASS_INPUT_OUTPUT, mask, values);
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/* Generate a graphics context for the titlebar */
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stack_win->gc = xcb_generate_id(conn);
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xcb_create_gc(conn, stack_win->gc, stack_win->window, 0, 0);
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stack_win->container = container;
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SLIST_INSERT_HEAD(&stack_wins, stack_win, stack_windows);
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/* Raise the focused window */
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values[0] = XCB_STACK_MODE_ABOVE;
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xcb_configure_window(conn, container->currently_focused->frame,
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XCB_CONFIG_WINDOW_STACK_MODE, values);
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} else {
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if (container->mode == MODE_STACK) {
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/* When going out of stacking mode, we need to close the window */
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struct Stack_Window *stack_win = &(container->stack_win);
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SLIST_REMOVE(&stack_wins, stack_win, Stack_Window, stack_windows);
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xcb_free_gc(conn, stack_win->gc);
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xcb_destroy_window(conn, stack_win->window);
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stack_win->width = -1;
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stack_win->height = -1;
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}
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}
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container->mode = mode;
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/* Force reconfiguration of each client */
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Client *client;
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CIRCLEQ_FOREACH(client, &(container->clients), clients)
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client->force_reconfigure = true;
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render_layout(conn);
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}
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/*
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* Warps the pointer into the given client (in the middle of it, to be specific), therefore
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* selecting it
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*
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*/
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void warp_pointer_into(xcb_connection_t *connection, Client *client) {
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int mid_x = client->rect.width / 2,
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mid_y = client->rect.height / 2;
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xcb_warp_pointer(connection, XCB_NONE, client->child, 0, 0, 0, 0, mid_x, mid_y);
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}
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/*
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* Toggles fullscreen mode for the given client. It updates the data structures and
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* reconfigures (= resizes/moves) the client and its frame to the full size of the
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* screen. When leaving fullscreen, re-rendering the layout is forced.
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*
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*/
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void toggle_fullscreen(xcb_connection_t *conn, Client *client) {
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/* clients without a container (docks) cannot be focused */
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assert(client->container != NULL);
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Workspace *workspace = client->container->workspace;
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workspace->fullscreen_client = (client->fullscreen ? NULL : client);
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client->fullscreen = !client->fullscreen;
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if (client->fullscreen) {
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printf("Entering fullscreen mode...\n");
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/* We just entered fullscreen mode, let’s configure the window */
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uint32_t mask = XCB_CONFIG_WINDOW_X |
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XCB_CONFIG_WINDOW_Y |
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XCB_CONFIG_WINDOW_WIDTH |
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XCB_CONFIG_WINDOW_HEIGHT;
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uint32_t values[4] = {workspace->rect.x,
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workspace->rect.y,
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workspace->rect.width,
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workspace->rect.height};
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printf("child itself will be at %dx%d with size %dx%d\n",
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values[0], values[1], values[2], values[3]);
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xcb_configure_window(conn, client->frame, mask, values);
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/* Child’s coordinates are relative to the parent (=frame) */
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values[0] = 0;
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values[1] = 0;
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xcb_configure_window(conn, client->child, mask, values);
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/* Raise the window */
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values[0] = XCB_STACK_MODE_ABOVE;
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xcb_configure_window(conn, client->frame, XCB_CONFIG_WINDOW_STACK_MODE, values);
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xcb_flush(conn);
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} else {
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printf("leaving fullscreen mode\n");
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/* Because the coordinates of the window haven’t changed, it would not be
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re-configured if we don’t set the following flag */
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client->force_reconfigure = true;
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/* We left fullscreen mode, redraw the layout */
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render_layout(conn);
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}
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}
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