357 lines
12 KiB
C
357 lines
12 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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* 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 <ev.h>
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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 <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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static int sockfd;
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static xcb_key_symbols_t *symbols;
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static int modeswitchmask;
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static int numlockmask;
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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 char *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 int font_height;
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static char *command_prefix;
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static char *prompt;
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static int prompt_len;
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static int limit;
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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 = calloc(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, 500, font_height + 8}, inner = {2, 2, 496, font_height + 8 - 4};
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xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#FF0000"));
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xcb_poly_fill_rectangle(conn, pixmap, pixmap_gc, 1, &border);
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xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#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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xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FOREGROUND, get_colorpixel(conn, "#FFFFFF"));
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uint8_t *con = concat_strings(glyphs_ucs, input_position);
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char *full_text = (char*)con;
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if (prompt != NULL) {
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full_text = malloc((prompt_len + input_position) * 2 + 1);
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if (full_text == NULL)
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err(EXIT_FAILURE, "malloc() failed\n");
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memcpy(full_text, prompt, prompt_len * 2);
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memcpy(full_text + (prompt_len * 2), con, input_position * 2);
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}
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xcb_image_text_16(conn, input_position + prompt_len, pixmap, pixmap_gc, 4 /* X */,
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font_height + 2 /* Y = baseline of font */, (xcb_char2b_t*)full_text);
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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, /* */ 500, font_height + 8);
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xcb_flush(conn);
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free(con);
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if (prompt != NULL)
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free(full_text);
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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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/* fix state */
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event->state &= ~numlockmask;
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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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uint8_t *command = concat_strings(glyphs_utf8, input_position);
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char *full_command = (char*)command;
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/* prefix the command if a prefix was specified on commandline */
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if (command_prefix != NULL) {
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if (asprintf(&full_command, "%s%s", command_prefix, command) == -1)
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err(EXIT_FAILURE, "asprintf() failed\n");
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}
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printf("command = %s\n", full_command);
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ipc_send_message(sockfd, strlen(full_command), 0, (uint8_t*)full_command);
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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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/* fix state */
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if (modeswitch_active)
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event->state |= modeswitchmask;
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/* Apparantly, after activating numlock once, the numlock modifier
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* stays turned on (use xev(1) to verify). So, to resolve useful
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* keysyms, we remove the numlock flag from the event state */
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event->state &= ~numlockmask;
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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 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_ucs[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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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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/* store the UCS into a string */
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uint8_t inp[3] = {(ucs & 0xFF00) >> 8, (ucs & 0xFF), 0};
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printf("inp[0] = %02x, inp[1] = %02x, inp[2] = %02x\n", inp[0], inp[1], inp[2]);
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/* convert it to UTF-8 */
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char *out = convert_ucs_to_utf8((char*)inp);
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printf("converted to %s\n", out);
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glyphs_ucs[input_position] = malloc(3 * sizeof(uint8_t));
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if (glyphs_ucs[input_position] == NULL)
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err(EXIT_FAILURE, "malloc() failed\n");
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memcpy(glyphs_ucs[input_position], inp, 3);
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glyphs_utf8[input_position] = strdup(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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int main(int argc, char *argv[]) {
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char *socket_path = "/tmp/i3-ipc.sock";
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char *pattern = "-misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1";
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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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{"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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};
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char *options_string = "s:p:P:f:l: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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socket_path = strdup(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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command_prefix = strdup(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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prompt = strdup(optarg);
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break;
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case 'f':
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pattern = strdup(optarg);
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break;
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case 'h':
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printf("i3-input " I3_VERSION);
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printf("i3-input [-s <socket>] [-p <prefix>] [-l <limit>] [-P <prompt>] [-f <font>] [-v]\n");
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return 0;
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}
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}
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sockfd = connect_ipc(socket_path);
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if (prompt != NULL)
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prompt = convert_utf8_to_ucs2(prompt, &prompt_len);
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int screens;
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xcb_connection_t *conn = xcb_connect(NULL, &screens);
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if (xcb_connection_has_error(conn))
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die("Cannot open display\n");
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/* Set up event handlers for key press and key release */
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xcb_event_handlers_t evenths;
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memset(&evenths, 0, sizeof(xcb_event_handlers_t));
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xcb_event_handlers_init(conn, &evenths);
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xcb_event_set_key_press_handler(&evenths, handle_key_press, NULL);
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xcb_event_set_key_release_handler(&evenths, handle_key_release, NULL);
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xcb_event_set_expose_handler(&evenths, handle_expose, NULL);
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modeswitchmask = get_mod_mask(conn, XK_Mode_switch);
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numlockmask = get_mod_mask(conn, XK_Num_Lock);
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symbols = xcb_key_symbols_alloc(conn);
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uint32_t font_id = get_font_id(conn, pattern, &font_height);
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/* Open an input window */
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win = open_input_window(conn, 500, font_height + 8);
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/* Create pixmap */
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xcb_screen_t *root_screen = xcb_aux_get_screen(conn, screens);
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pixmap = xcb_generate_id(conn);
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pixmap_gc = xcb_generate_id(conn);
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xcb_create_pixmap(conn, root_screen->root_depth, pixmap, win, 500, font_height + 8);
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xcb_create_gc(conn, pixmap_gc, pixmap, 0, 0);
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/* Set input focus (we have override_redirect=1, so the wm will not do
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* this for us) */
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xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, win, XCB_CURRENT_TIME);
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/* Create graphics context */
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xcb_change_gc_single(conn, pixmap_gc, XCB_GC_FONT, font_id);
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/* Grab the keyboard to get all input */
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xcb_flush(conn);
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/* Try (repeatedly, if necessary) to grab the keyboard. We might not
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* get the keyboard at the first attempt because of the keybinding
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* still being active when started via a wm’s keybinding. */
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xcb_grab_keyboard_cookie_t cookie;
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xcb_grab_keyboard_reply_t *reply = NULL;
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int count = 0;
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while ((reply == NULL || reply->status != XCB_GRAB_STATUS_SUCCESS) && (count++ < 500)) {
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cookie = xcb_grab_keyboard(conn, false, win, XCB_CURRENT_TIME, XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC);
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reply = xcb_grab_keyboard_reply(conn, cookie, NULL);
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usleep(1000);
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}
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if (reply->status != XCB_GRAB_STATUS_SUCCESS) {
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fprintf(stderr, "Could not grab keyboard, status = %d\n", reply->status);
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exit(-1);
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}
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xcb_flush(conn);
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xcb_event_wait_for_event_loop(&evenths);
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return 0;
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}
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