573 lines
19 KiB
C
573 lines
19 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009 Michael Stapelberg and contributors (see also: LICENSE)
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*
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* i3-input/main.c: Utility which lets the user input commands and sends them
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* to i3.
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*
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <err.h>
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#include <stdint.h>
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#include <getopt.h>
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#include <limits.h>
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#include <xcb/xcb.h>
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#include <xcb/xcb_aux.h>
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#include <xcb/xcb_event.h>
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#include <xcb/xcb_keysyms.h>
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#include <X11/keysym.h>
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#include "keysym2ucs.h"
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#include "i3-input.h"
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#include "libi3.h"
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/* IPC format string. %s will be replaced with what the user entered, then
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* the command will be sent to i3 */
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static char *format;
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static char *socket_path;
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static int sockfd;
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static xcb_key_symbols_t *symbols;
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static bool modeswitch_active = false;
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static xcb_window_t win;
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static xcb_pixmap_t pixmap;
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static xcb_gcontext_t pixmap_gc;
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static xcb_char2b_t glyphs_ucs[512];
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static char *glyphs_utf8[512];
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static int input_position;
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static i3Font font;
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static i3String *prompt;
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static int prompt_offset = 0;
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static int limit;
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xcb_window_t root;
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xcb_connection_t *conn;
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xcb_screen_t *root_screen;
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static xcb_get_input_focus_cookie_t focus_cookie;
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/*
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* Having verboselog(), errorlog() and debuglog() is necessary when using libi3.
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*
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*/
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void verboselog(char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vfprintf(stdout, fmt, args);
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va_end(args);
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}
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void errorlog(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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}
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void debuglog(char *fmt, ...) {
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}
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/*
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* Restores the X11 input focus to wherever it was before.
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* This is necessary because i3-input’s window has override_redirect=1
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* (→ unmanaged by the window manager) and thus i3-input changes focus itself.
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* This function is called on exit().
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*
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*/
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static void restore_input_focus(void) {
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xcb_generic_error_t *error;
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xcb_get_input_focus_reply_t *reply = xcb_get_input_focus_reply(conn, focus_cookie, &error);
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if (error != NULL) {
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fprintf(stderr, "[i3-input] ERROR: Could not restore input focus (X error %d)\n", error->error_code);
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return;
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}
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xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, reply->focus, XCB_CURRENT_TIME);
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xcb_flush(conn);
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}
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/*
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* Concats the glyphs (either UCS-2 or UTF-8) to a single string, suitable for
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* rendering it (UCS-2) or sending it to i3 (UTF-8).
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*
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*/
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static uint8_t *concat_strings(char **glyphs, int max) {
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uint8_t *output = scalloc(max + 1, 4);
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uint8_t *walk = output;
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for (int c = 0; c < max; c++) {
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printf("at %c\n", glyphs[c][0]);
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/* if the first byte is 0, this has to be UCS2 */
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if (glyphs[c][0] == '\0') {
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memcpy(walk, glyphs[c], 2);
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walk += 2;
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} else {
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strcpy((char *)walk, glyphs[c]);
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walk += strlen(glyphs[c]);
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}
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}
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printf("output = %s\n", output);
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return output;
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}
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/*
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* Handles expose events (redraws of the window) and rendering in general. Will
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* be called from the code with event == NULL or from X with event != NULL.
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*
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*/
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static int handle_expose(void *data, xcb_connection_t *conn, xcb_expose_event_t *event) {
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printf("expose!\n");
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/* re-draw the background */
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xcb_rectangle_t border = {0, 0, logical_px(500), font.height + logical_px(8)},
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inner = {logical_px(2), logical_px(2), logical_px(496), font.height + logical_px(8) - logical_px(4)};
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){get_colorpixel("#FF0000")});
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xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &border);
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xcb_change_gc(conn, pixmap_gc, XCB_GC_FOREGROUND, (uint32_t[]){get_colorpixel("#000000")});
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xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &inner);
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/* restore font color */
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set_font_colors(pixmap_gc, draw_util_hex_to_color("#FFFFFF"), draw_util_hex_to_color("#000000"));
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/* draw the prompt … */
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if (prompt != NULL) {
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draw_text(prompt, pixmap, pixmap_gc, NULL, logical_px(4), logical_px(4), logical_px(492));
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}
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/* … and the text */
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if (input_position > 0) {
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i3String *input = i3string_from_ucs2(glyphs_ucs, input_position);
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draw_text(input, pixmap, pixmap_gc, NULL, prompt_offset + logical_px(4), logical_px(4), logical_px(492));
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i3string_free(input);
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}
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/* Copy the contents of the pixmap to the real window */
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xcb_copy_area(conn, pixmap, win, pixmap_gc, 0, 0, 0, 0, logical_px(500), font.height + logical_px(8));
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xcb_flush(conn);
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return 1;
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}
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/*
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* Deactivates the Mode_switch bit upon release of the Mode_switch key.
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*
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*/
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static int handle_key_release(void *ignored, xcb_connection_t *conn, xcb_key_release_event_t *event) {
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printf("releasing %d, state raw = %d\n", event->detail, event->state);
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xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state);
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if (sym == XK_Mode_switch) {
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printf("Mode switch disabled\n");
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modeswitch_active = false;
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}
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return 1;
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}
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static void finish_input() {
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char *command = (char *)concat_strings(glyphs_utf8, input_position);
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/* count the occurrences of %s in the string */
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int c;
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int len = strlen(format);
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int cnt = 0;
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for (c = 0; c < (len - 1); c++)
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if (format[c] == '%' && format[c + 1] == 's')
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cnt++;
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printf("occurrences = %d\n", cnt);
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/* allocate space for the output */
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int inputlen = strlen(command);
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char *full = scalloc(strlen(format) - (2 * cnt) /* format without all %s */
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+ (inputlen * cnt) /* replaced %s */
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+ 1, /* trailing NUL */
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1);
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char *dest = full;
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for (c = 0; c < len; c++) {
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/* if this is not % or it is % but without a following 's',
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* just copy the character */
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if (format[c] != '%' || (c == (len - 1)) || format[c + 1] != 's')
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*(dest++) = format[c];
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else {
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strncat(dest, command, inputlen);
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dest += inputlen;
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/* skip the following 's' of '%s' */
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c++;
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}
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}
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/* prefix the command if a prefix was specified on commandline */
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printf("command = %s\n", full);
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restore_input_focus();
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xcb_aux_sync(conn);
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ipc_send_message(sockfd, strlen(full), 0, (uint8_t *)full);
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free(full);
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#if 0
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free(command);
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return 1;
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#endif
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exit(0);
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}
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/*
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* Handles keypresses by converting the keycodes to keysymbols, then the
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* keysymbols to UCS-2. If the conversion succeeded, the glyph is saved in the
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* internal buffers and displayed in the input window.
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*
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* Also handles backspace (deleting one character) and return (sending the
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* command to i3).
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*
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*/
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static int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
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printf("Keypress %d, state raw = %d\n", event->detail, event->state);
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// TODO: port the input handling code from i3lock once libxkbcommon ≥ 0.5.0
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// is available in distros.
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/* See the documentation of xcb_key_symbols_get_keysym for this one.
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* Basically: We get either col 0 or col 1, depending on whether shift is
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* pressed. */
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int col = (event->state & XCB_MOD_MASK_SHIFT);
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/* If modeswitch is currently active, we need to look in group 2 or 3,
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* respectively. */
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if (modeswitch_active)
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col += 2;
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xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, col);
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if (sym == XK_Mode_switch) {
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printf("Mode switch enabled\n");
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modeswitch_active = true;
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return 1;
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}
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if (sym == XK_Return)
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finish_input();
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if (sym == XK_BackSpace) {
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if (input_position == 0)
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return 1;
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input_position--;
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free(glyphs_utf8[input_position]);
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handle_expose(NULL, conn, NULL);
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return 1;
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}
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if (sym == XK_Escape) {
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restore_input_focus();
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exit(0);
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}
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/* TODO: handle all of these? */
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printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
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printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
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printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
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printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
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printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
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printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
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printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
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if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym))
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return 1;
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printf("sym = %c (%d)\n", sym, sym);
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/* convert the keysym to UCS */
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uint16_t ucs = keysym2ucs(sym);
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if ((int16_t)ucs == -1) {
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fprintf(stderr, "Keysym could not be converted to UCS, skipping\n");
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return 1;
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}
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xcb_char2b_t inp;
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inp.byte1 = (ucs & 0xff00) >> 2;
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inp.byte2 = (ucs & 0x00ff) >> 0;
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printf("inp.byte1 = %02x, inp.byte2 = %02x\n", inp.byte1, inp.byte2);
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/* convert it to UTF-8 */
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char *out = convert_ucs2_to_utf8(&inp, 1);
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printf("converted to %s\n", out);
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glyphs_ucs[input_position] = inp;
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glyphs_utf8[input_position] = out;
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input_position++;
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if (input_position == limit)
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finish_input();
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handle_expose(NULL, conn, NULL);
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return 1;
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}
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static xcb_rectangle_t get_window_position(void) {
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xcb_rectangle_t result = (xcb_rectangle_t){logical_px(50), logical_px(50), logical_px(500), font.height + logical_px(8)};
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xcb_get_property_reply_t *supporting_wm_reply = NULL;
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xcb_get_input_focus_reply_t *input_focus = NULL;
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xcb_get_geometry_reply_t *geometry = NULL;
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xcb_get_property_reply_t *wm_class = NULL;
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xcb_translate_coordinates_reply_t *coordinates = NULL;
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xcb_atom_t A__NET_SUPPORTING_WM_CHECK;
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xcb_intern_atom_cookie_t nswc_cookie = xcb_intern_atom(conn, 0, strlen("_NET_SUPPORTING_WM_CHECK"), "_NET_SUPPORTING_WM_CHECK");
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xcb_intern_atom_reply_t *nswc_reply = xcb_intern_atom_reply(conn, nswc_cookie, NULL);
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if (nswc_reply == NULL) {
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ELOG("Could not intern atom _NET_SUPPORTING_WM_CHECK\n");
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exit(-1);
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}
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A__NET_SUPPORTING_WM_CHECK = nswc_reply->atom;
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free(nswc_reply);
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supporting_wm_reply = xcb_get_property_reply(
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conn, xcb_get_property(conn, false, root, A__NET_SUPPORTING_WM_CHECK, XCB_ATOM_WINDOW, 0, 32), NULL);
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xcb_window_t *supporting_wm_win = NULL;
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if (supporting_wm_reply == NULL || xcb_get_property_value_length(supporting_wm_reply) == 0) {
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DLOG("Could not determine EWMH support window.\n");
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} else {
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supporting_wm_win = xcb_get_property_value(supporting_wm_reply);
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}
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/* In rare cases, the window holding the input focus might disappear while we are figuring out its
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* position. To avoid this, we grab the server in the meantime. */
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xcb_grab_server(conn);
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input_focus = xcb_get_input_focus_reply(conn, xcb_get_input_focus(conn), NULL);
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if (input_focus == NULL || input_focus->focus == XCB_NONE) {
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DLOG("Failed to receive the current input focus or no window has the input focus right now.\n");
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goto free_resources;
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}
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/* We need to ignore the EWMH support window to which the focus can be set if there's no suitable window to focus. */
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if (supporting_wm_win != NULL && input_focus->focus == *supporting_wm_win) {
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DLOG("Input focus is on the EWMH support window, ignoring.\n");
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goto free_resources;
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}
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geometry = xcb_get_geometry_reply(conn, xcb_get_geometry(conn, input_focus->focus), NULL);
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if (geometry == NULL) {
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DLOG("Failed to received window geometry.\n");
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goto free_resources;
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}
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wm_class = xcb_get_property_reply(
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conn, xcb_get_property(conn, false, input_focus->focus, XCB_ATOM_WM_CLASS, XCB_GET_PROPERTY_TYPE_ANY, 0, 32), NULL);
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/* We need to find out whether the input focus is on an i3 frame window. If it is, we must not translate the coordinates. */
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if (wm_class == NULL || xcb_get_property_value_length(wm_class) == 0 || strcmp(xcb_get_property_value(wm_class), "i3-frame") != 0) {
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coordinates = xcb_translate_coordinates_reply(
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conn, xcb_translate_coordinates(conn, input_focus->focus, root, geometry->x, geometry->y), NULL);
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if (coordinates == NULL) {
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DLOG("Failed to translate coordinates.\n");
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goto free_resources;
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}
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DLOG("Determined coordinates of window with input focus at x = %i / y = %i.\n", coordinates->dst_x, coordinates->dst_y);
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result.x += coordinates->dst_x;
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result.y += coordinates->dst_y;
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} else {
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DLOG("Determined coordinates of window with input focus at x = %i / y = %i.\n", geometry->x, geometry->y);
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result.x += geometry->x;
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result.y += geometry->y;
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}
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free_resources:
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xcb_ungrab_server(conn);
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xcb_flush(conn);
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FREE(supporting_wm_reply);
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FREE(input_focus);
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FREE(geometry);
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FREE(wm_class);
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FREE(coordinates);
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return result;
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}
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int main(int argc, char *argv[]) {
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format = sstrdup("%s");
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socket_path = getenv("I3SOCK");
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char *pattern = sstrdup("pango:monospace 8");
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int o, option_index = 0;
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static struct option long_options[] = {
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{"socket", required_argument, 0, 's'},
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{"version", no_argument, 0, 'v'},
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{"limit", required_argument, 0, 'l'},
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{"prompt", required_argument, 0, 'P'},
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{"prefix", required_argument, 0, 'p'},
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{"format", required_argument, 0, 'F'},
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{"font", required_argument, 0, 'f'},
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{"help", no_argument, 0, 'h'},
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{0, 0, 0, 0}};
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char *options_string = "s:p:P:f:l:F:vh";
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while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
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switch (o) {
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case 's':
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FREE(socket_path);
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socket_path = sstrdup(optarg);
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break;
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case 'v':
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printf("i3-input " I3_VERSION);
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return 0;
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case 'p':
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/* This option is deprecated, but will still work in i3 v4.1, 4.2 and 4.3 */
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fprintf(stderr, "i3-input: WARNING: the -p option is DEPRECATED in favor of the -F (format) option\n");
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FREE(format);
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sasprintf(&format, "%s%%s", optarg);
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break;
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case 'l':
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limit = atoi(optarg);
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break;
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case 'P':
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i3string_free(prompt);
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prompt = i3string_from_utf8(optarg);
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break;
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case 'f':
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FREE(pattern);
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pattern = sstrdup(optarg);
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break;
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case 'F':
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FREE(format);
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format = sstrdup(optarg);
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break;
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case 'h':
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printf("i3-input " I3_VERSION "\n");
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printf("i3-input [-s <socket>] [-F <format>] [-l <limit>] [-P <prompt>] [-f <font>] [-v]\n");
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printf("\n");
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printf("Example:\n");
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printf(" i3-input -F 'workspace \"%%s\"' -P 'Switch to workspace: '\n");
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return 0;
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}
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}
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printf("using format \"%s\"\n", format);
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int screen;
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conn = xcb_connect(NULL, &screen);
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if (!conn || xcb_connection_has_error(conn))
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die("Cannot open display\n");
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||
|
||
if (socket_path == NULL)
|
||
socket_path = root_atom_contents("I3_SOCKET_PATH", conn, screen);
|
||
|
||
if (socket_path == NULL)
|
||
socket_path = "/tmp/i3-ipc.sock";
|
||
|
||
sockfd = ipc_connect(socket_path);
|
||
|
||
/* Request the current InputFocus to restore when i3-input exits. */
|
||
focus_cookie = xcb_get_input_focus(conn);
|
||
|
||
root_screen = xcb_aux_get_screen(conn, screen);
|
||
root = root_screen->root;
|
||
|
||
symbols = xcb_key_symbols_alloc(conn);
|
||
|
||
font = load_font(pattern, true);
|
||
set_font(&font);
|
||
|
||
if (prompt != NULL)
|
||
prompt_offset = predict_text_width(prompt);
|
||
|
||
const xcb_rectangle_t win_pos = get_window_position();
|
||
|
||
/* Open an input window */
|
||
win = xcb_generate_id(conn);
|
||
xcb_create_window(
|
||
conn,
|
||
XCB_COPY_FROM_PARENT,
|
||
win, /* the window id */
|
||
root, /* parent == root */
|
||
win_pos.x, win_pos.y, win_pos.width, win_pos.height, /* dimensions */
|
||
0, /* X11 border = 0, we draw our own */
|
||
XCB_WINDOW_CLASS_INPUT_OUTPUT,
|
||
XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
|
||
XCB_CW_BACK_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK,
|
||
(uint32_t[]){
|
||
0, /* back pixel: black */
|
||
1, /* override redirect: don’t manage this window */
|
||
XCB_EVENT_MASK_EXPOSURE});
|
||
|
||
/* Map the window (make it visible) */
|
||
xcb_map_window(conn, win);
|
||
|
||
/* Create pixmap */
|
||
pixmap = xcb_generate_id(conn);
|
||
pixmap_gc = xcb_generate_id(conn);
|
||
xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, logical_px(500), font.height + logical_px(8));
|
||
xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
|
||
|
||
/* Set input focus (we have override_redirect=1, so the wm will not do
|
||
* this for us) */
|
||
xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, win, XCB_CURRENT_TIME);
|
||
|
||
/* Grab the keyboard to get all input */
|
||
xcb_flush(conn);
|
||
|
||
/* Try (repeatedly, if necessary) to grab the keyboard. We might not
|
||
* get the keyboard at the first attempt because of the keybinding
|
||
* still being active when started via a wm’s keybinding. */
|
||
xcb_grab_keyboard_cookie_t cookie;
|
||
xcb_grab_keyboard_reply_t *reply = NULL;
|
||
|
||
int count = 0;
|
||
while ((reply == NULL || reply->status != XCB_GRAB_STATUS_SUCCESS) && (count++ < 500)) {
|
||
cookie = xcb_grab_keyboard(conn, false, win, XCB_CURRENT_TIME, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
|
||
reply = xcb_grab_keyboard_reply(conn, cookie, NULL);
|
||
usleep(1000);
|
||
}
|
||
|
||
if (reply->status != XCB_GRAB_STATUS_SUCCESS) {
|
||
fprintf(stderr, "Could not grab keyboard, status = %d\n", reply->status);
|
||
restore_input_focus();
|
||
exit(-1);
|
||
}
|
||
|
||
xcb_flush(conn);
|
||
|
||
xcb_generic_event_t *event;
|
||
while ((event = xcb_wait_for_event(conn)) != NULL) {
|
||
if (event->response_type == 0) {
|
||
fprintf(stderr, "X11 Error received! sequence %x\n", event->sequence);
|
||
continue;
|
||
}
|
||
|
||
/* Strip off the highest bit (set if the event is generated) */
|
||
int type = (event->response_type & 0x7F);
|
||
|
||
switch (type) {
|
||
case XCB_KEY_PRESS:
|
||
handle_key_press(NULL, conn, (xcb_key_press_event_t *)event);
|
||
break;
|
||
|
||
case XCB_KEY_RELEASE:
|
||
handle_key_release(NULL, conn, (xcb_key_release_event_t *)event);
|
||
break;
|
||
|
||
case XCB_EXPOSE:
|
||
handle_expose(NULL, conn, (xcb_expose_event_t *)event);
|
||
break;
|
||
}
|
||
|
||
free(event);
|
||
}
|
||
|
||
return 0;
|
||
}
|