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i3/i3-input/main.c

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/*
* vim:ts=8:expandtab
*
* i3 - an improved dynamic tiling window manager
*
* © 2009 Michael Stapelberg and contributors
*
* See file LICENSE for license information.
*
* i3-input/main.c: Utility which lets the user input commands and sends them
* to i3.
*
*/
#include <ev.h>
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <err.h>
#include <stdint.h>
#include <getopt.h>
#include <xcb/xcb.h>
#include <xcb/xcb_aux.h>
#include <xcb/xcb_event.h>
#include <xcb/xcb_keysyms.h>
#include <X11/keysym.h>
#include "keysym2ucs.h"
#include "i3-input.h"
static int sockfd;
static xcb_key_symbols_t *symbols;
static int modeswitchmask;
static bool modeswitch_active = false;
static xcb_window_t win;
static xcb_pixmap_t pixmap;
static xcb_gcontext_t pixmap_gc;
static char *glyphs_ucs[512];
static char *glyphs_utf8[512];
static int input_position;
static int font_height;
static char *command_prefix;
static char *prompt;
static int prompt_len;
static int limit;
/*
* Concats the glyphs (either UCS-2 or UTF-8) to a single string, suitable for
* rendering it (UCS-2) or sending it to i3 (UTF-8).
*
*/
static uint8_t *concat_strings(char **glyphs, int max) {
uint8_t *output = calloc(max+1, 4);
uint8_t *walk = output;
for (int c = 0; c < max; c++) {
printf("at %c\n", glyphs[c][0]);
/* if the first byte is 0, this has to be UCS2 */
if (glyphs[c][0] == '\0') {
memcpy(walk, glyphs[c], 2);
walk += 2;
} else {
strcpy((char*)walk, glyphs[c]);
walk += strlen(glyphs[c]);
}
}
printf("output = %s\n", output);
return output;
}
/*
* Handles expose events (redraws of the window) and rendering in general. Will
* be called from the code with event == NULL or from X with event != NULL.
*
*/
static int handle_expose(void *data, xcb_connection_t *conn, xcb_expose_event_t *event) {
printf("expose!\n");
/* re-draw the background */
xcb_rectangle_t border = {0, 0, 500, font_height + 8}, inner = {2, 2, 496, font_height + 8 - 4};
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#FF0000"));
xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &border);
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#000000"));
xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &inner);
/* restore font color */
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#FFFFFF"));
uint8_t *con = concat_strings(glyphs_ucs, input_position);
char *full_text = (char*)con;
if (prompt != NULL) {
full_text = malloc((prompt_len + input_position) * 2 + 1);
if (full_text == NULL)
err(EXIT_FAILURE, "malloc() failed\n");
memcpy(full_text, prompt, prompt_len * 2);
memcpy(full_text + (prompt_len * 2), con, input_position * 2);
}
xcb_image_text_16(conn, input_position + prompt_len, pixmap, pixmap_gc, 4 /* X */,
font_height + 2 /* Y = baseline of font */, (xcb_char2b_t*)full_text);
/* Copy the contents of the pixmap to the real window */
xcb_copy_area(conn, pixmap, win, pixmap_gc, 0, 0, 0, 0, /* */ 500, font_height + 8);
xcb_flush(conn);
free(con);
if (prompt != NULL)
free(full_text);
return 1;
}
/*
* Deactivates the Mode_switch bit upon release of the Mode_switch key.
*
*/
static int handle_key_release(void *ignored, xcb_connection_t *conn, xcb_key_release_event_t *event) {
printf("releasing %d, state raw = %d\n", event->detail, event->state);
xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state);
if (sym == XK_Mode_switch) {
printf("Mode switch disabled\n");
modeswitch_active = false;
}
return 1;
}
static void finish_input() {
uint8_t *command = concat_strings(glyphs_utf8, input_position);
char *full_command = (char*)command;
/* prefix the command if a prefix was specified on commandline */
if (command_prefix != NULL) {
if (asprintf(&full_command, "%s%s", command_prefix, command) == -1)
err(EXIT_FAILURE, "asprintf() failed\n");
}
printf("command = %s\n", full_command);
ipc_send_message(sockfd, strlen(full_command), 0, (uint8_t*)full_command);
#if 0
free(command);
return 1;
#endif
exit(0);
}
/*
* Handles keypresses by converting the keycodes to keysymbols, then the
* keysymbols to UCS-2. If the conversion succeeded, the glyph is saved in the
* internal buffers and displayed in the input window.
*
* Also handles backspace (deleting one character) and return (sending the
* command to i3).
*
*/
static int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press_event_t *event) {
printf("Keypress %d, state raw = %d\n", event->detail, event->state);
/* fix state */
if (modeswitch_active)
event->state |= modeswitchmask;
xcb_keysym_t sym = xcb_key_press_lookup_keysym(symbols, event, event->state);
if (sym == XK_Mode_switch) {
printf("Mode switch enabled\n");
modeswitch_active = true;
return 1;
}
if (sym == XK_Return)
finish_input();
if (sym == XK_BackSpace) {
if (input_position == 0)
return 1;
input_position--;
free(glyphs_ucs[input_position]);
free(glyphs_utf8[input_position]);
handle_expose(NULL, conn, NULL);
return 1;
}
if (sym == XK_Escape) {
exit(0);
}
/* TODO: handle all of these? */
printf("is_keypad_key = %d\n", xcb_is_keypad_key(sym));
printf("is_private_keypad_key = %d\n", xcb_is_private_keypad_key(sym));
printf("xcb_is_cursor_key = %d\n", xcb_is_cursor_key(sym));
printf("xcb_is_pf_key = %d\n", xcb_is_pf_key(sym));
printf("xcb_is_function_key = %d\n", xcb_is_function_key(sym));
printf("xcb_is_misc_function_key = %d\n", xcb_is_misc_function_key(sym));
printf("xcb_is_modifier_key = %d\n", xcb_is_modifier_key(sym));
if (xcb_is_modifier_key(sym) || xcb_is_cursor_key(sym))
return 1;
printf("sym = %c (%d)\n", sym, sym);
/* convert the keysym to UCS */
uint16_t ucs = keysym2ucs(sym);
if ((int16_t)ucs == -1) {
fprintf(stderr, "Keysym could not be converted to UCS, skipping\n");
return 1;
}
/* store the UCS into a string */
uint8_t inp[3] = {(ucs & 0xFF00) >> 8, (ucs & 0xFF), 0};
printf("inp[0] = %02x, inp[1] = %02x, inp[2] = %02x\n", inp[0], inp[1], inp[2]);
/* convert it to UTF-8 */
char *out = convert_ucs_to_utf8((char*)inp);
printf("converted to %s\n", out);
glyphs_ucs[input_position] = malloc(3 * sizeof(uint8_t));
if (glyphs_ucs[input_position] == NULL)
err(EXIT_FAILURE, "malloc() failed\n");
memcpy(glyphs_ucs[input_position], inp, 3);
glyphs_utf8[input_position] = strdup(out);
input_position++;
if (input_position == limit)
finish_input();
handle_expose(NULL, conn, NULL);
return 1;
}
int main(int argc, char *argv[]) {
char *socket_path = "/tmp/i3-ipc.sock";
char *pattern = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
int o, option_index = 0;
static struct option long_options[] = {
{"socket", required_argument, 0, 's'},
{"version", no_argument, 0, 'v'},
{"limit", required_argument, 0, 'l'},
{"prompt", required_argument, 0, 'P'},
{"prefix", required_argument, 0, 'p'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
char *options_string = "s:p:P:l:vh";
while ((o = getopt_long(argc, argv, options_string, long_options, &option_index)) != -1) {
switch (o) {
case 's':
socket_path = strdup(optarg);
break;
case 'v':
printf("i3-input " I3_VERSION);
return 0;
case 'p':
command_prefix = strdup(optarg);
break;
case 'l':
limit = atoi(optarg);
break;
case 'P':
prompt = strdup(optarg);
break;
case 'h':
printf("i3-input " I3_VERSION);
printf("i3-input [-s <socket>] [-p <prefix>] [-l <limit>] [-P <prompt>] [-v]\n");
return 0;
}
}
sockfd = connect_ipc(socket_path);
if (prompt != NULL)
prompt = convert_utf8_to_ucs2(prompt, &prompt_len);
int screens;
xcb_connection_t *conn = xcb_connect(NULL, &screens);
if (xcb_connection_has_error(conn))
die("Cannot open display\n");
/* Set up event handlers for key press and key release */
xcb_event_handlers_t evenths;
memset(&evenths, 0, sizeof(xcb_event_handlers_t));
xcb_event_handlers_init(conn, &evenths);
xcb_event_set_key_press_handler(&evenths, handle_key_press, NULL);
xcb_event_set_key_release_handler(&evenths, handle_key_release, NULL);
xcb_event_set_expose_handler(&evenths, handle_expose, NULL);
modeswitchmask = get_mode_switch_mask(conn);
symbols = xcb_key_symbols_alloc(conn);
uint32_t font_id = get_font_id(conn, pattern, &font_height);
/* Open an input window */
win = open_input_window(conn, 500, font_height + 8);
/* Create pixmap */
xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
pixmap = xcb_generate_id(conn);
pixmap_gc = xcb_generate_id(conn);
xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, 500, font_height + 8);
xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
/* Create graphics context */
xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FONT, font_id);
/* Grab the keyboard to get all input */
xcb_grab_keyboard(conn, false, win, XCB_CURRENT_TIME, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
xcb_flush(conn);
xcb_event_wait_for_event_loop(&evenths);
return 0;
}
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