From e9fba2b7374400f6c6be7fb230be4e06a2e22542 Mon Sep 17 00:00:00 2001 From: Jan Arne Petersen Date: Sun, 18 Nov 2012 19:06:50 +0100 Subject: [PATCH] text: Add simple compose input method Add an input method listening to hardware keyboard input and generating compose text. Signed-off-by: Jan Arne Petersen --- clients/.gitignore | 1 + clients/Makefile.am | 11 +- clients/weston-simple-im.c | 338 +++++++++++++++++++++++++++++++++++++ 3 files changed, 349 insertions(+), 1 deletion(-) create mode 100644 clients/weston-simple-im.c diff --git a/clients/.gitignore b/clients/.gitignore index 5437de4b..3e7cd6cd 100644 --- a/clients/.gitignore +++ b/clients/.gitignore @@ -34,3 +34,4 @@ weston-tablet-shell weston-terminal workspaces-client-protocol.h workspaces-protocol.c +weston-simple-im diff --git a/clients/Makefile.am b/clients/Makefile.am index 284d23ef..fd636c24 100644 --- a/clients/Makefile.am +++ b/clients/Makefile.am @@ -13,7 +13,8 @@ libexec_PROGRAMS = \ $(tablet_shell) \ $(screenshooter) \ $(screensaver) \ - $(keyboard) + $(keyboard) \ + weston-simple-im AM_CFLAGS = $(GCC_CFLAGS) AM_CPPFLAGS = \ @@ -139,6 +140,14 @@ weston_keyboard_SOURCES = \ input-method-client-protocol.h weston_keyboard_LDADD = $(toolkit_libs) +weston_simple_im_SOURCES = \ + weston-simple-im.c \ + desktop-shell-client-protocol.h \ + desktop-shell-protocol.c \ + input-method-protocol.c \ + input-method-client-protocol.h +weston_simple_im_LDADD = $(toolkit_libs) + weston_info_SOURCES = \ weston-info.c \ ../shared/os-compatibility.c \ diff --git a/clients/weston-simple-im.c b/clients/weston-simple-im.c new file mode 100644 index 00000000..6c61fe8b --- /dev/null +++ b/clients/weston-simple-im.c @@ -0,0 +1,338 @@ +/* + * Copyright © 2012 Intel Corporation + * + * Permission to use, copy, modify, distribute, and sell this software and + * its documentation for any purpose is hereby granted without fee, provided + * that the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of the copyright holders not be used in + * advertising or publicity pertaining to distribution of the software + * without specific, written prior permission. The copyright holders make + * no representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER + * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF + * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include +#include +#include + +#include + +#include "window.h" +#include "keyboard-utils.h" +#include "input-method-client-protocol.h" + +enum compose_state { + state_normal, + state_compose +}; + +struct compose_seq { + uint32_t keys[4]; + + const char *text; +}; + +struct simple_im { + struct input_method *input_method; + struct input_method_context *context; + struct display *display; + struct wl_keyboard *keyboard; + struct keyboard_input *keyboard_input; + enum compose_state compose_state; + struct compose_seq compose_seq; +}; + +static const struct compose_seq compose_seqs[] = { + { { XKB_KEY_quotedbl, XKB_KEY_A, 0 }, "Ä" }, + { { XKB_KEY_quotedbl, XKB_KEY_O, 0 }, "Ö" }, + { { XKB_KEY_quotedbl, XKB_KEY_U, 0 }, "Ü" }, + { { XKB_KEY_quotedbl, XKB_KEY_a, 0 }, "ä" }, + { { XKB_KEY_quotedbl, XKB_KEY_o, 0 }, "ö" }, + { { XKB_KEY_quotedbl, XKB_KEY_u, 0 }, "ü" }, + { { XKB_KEY_apostrophe, XKB_KEY_A, 0 }, "Á" }, + { { XKB_KEY_apostrophe, XKB_KEY_a, 0 }, "á" }, + { { XKB_KEY_O, XKB_KEY_C, 0 }, "©" }, + { { XKB_KEY_O, XKB_KEY_R, 0 }, "®" }, + { { XKB_KEY_s, XKB_KEY_s, 0 }, "ß" }, +}; + +static const uint32_t ignore_keys_on_compose[] = { + XKB_KEY_Shift_L, + XKB_KEY_Shift_R +}; + +static void +input_method_context_surrounding_text(void *data, + struct input_method_context *context, + const char *text, + uint32_t cursor, + uint32_t anchor) +{ + fprintf(stderr, "Surrounding text updated: %s\n", text); +} + +static void +input_method_context_reset(void *data, + struct input_method_context *context) +{ + struct simple_im *keyboard = data; + + fprintf(stderr, "Reset pre-edit buffer\n"); + + keyboard->compose_state = state_normal; +} + +static const struct input_method_context_listener input_method_context_listener = { + input_method_context_surrounding_text, + input_method_context_reset +}; + +static void +input_method_keyboard_keymap(void *data, + struct wl_keyboard *wl_keyboard, + uint32_t format, + int32_t fd, + uint32_t size) +{ + struct simple_im *keyboard = data; + + keyboard_input_handle_keymap(keyboard->keyboard_input, format, fd, size); +} + +static void +input_method_keyboard_key(void *data, + struct wl_keyboard *wl_keyboard, + uint32_t serial, + uint32_t time, + uint32_t key, + uint32_t state_w) +{ + struct simple_im *keyboard = data; + + keyboard_input_handle_key(keyboard->keyboard_input, serial, + time, key, state_w); +} + +static void +input_method_keyboard_modifiers(void *data, + struct wl_keyboard *wl_keyboard, + uint32_t serial, + uint32_t mods_depressed, + uint32_t mods_latched, + uint32_t mods_locked, + uint32_t group) +{ + struct simple_im *keyboard = data; + struct input_method_context *context = keyboard->context; + + keyboard_input_handle_modifiers(keyboard->keyboard_input, serial, + mods_depressed, mods_latched, mods_locked, group); + + input_method_context_modifiers(context, serial, + mods_depressed, mods_depressed, + mods_latched, group); +} + +static const struct wl_keyboard_listener input_method_keyboard_listener = { + input_method_keyboard_keymap, + NULL, /* enter */ + NULL, /* leave */ + input_method_keyboard_key, + input_method_keyboard_modifiers +}; + +static void +input_method_activate(void *data, + struct input_method *input_method, + struct input_method_context *context) +{ + struct simple_im *keyboard = data; + + if (keyboard->context) + input_method_context_destroy(keyboard->context); + + keyboard->compose_state = state_normal; + + keyboard->context = context; + input_method_context_add_listener(context, + &input_method_context_listener, + keyboard); + keyboard->keyboard = input_method_context_grab_keyboard(context); + wl_keyboard_add_listener(keyboard->keyboard, + &input_method_keyboard_listener, + keyboard); +} + +static void +input_method_deactivate(void *data, + struct input_method *input_method, + struct input_method_context *context) +{ + struct simple_im *keyboard = data; + + if (!keyboard->context) + return; + + input_method_context_destroy(keyboard->context); + keyboard->context = NULL; +} + +static const struct input_method_listener input_method_listener = { + input_method_activate, + input_method_deactivate +}; + +static void +global_handler(struct display *display, uint32_t name, + const char *interface, uint32_t version, void *data) +{ + struct simple_im *keyboard = data; + + if (!strcmp(interface, "input_method")) { + keyboard->input_method = + display_bind(display, name, + &input_method_interface, 1); + input_method_add_listener(keyboard->input_method, &input_method_listener, keyboard); + } +} + +static int +compare_compose_keys(const void *c1, const void *c2) +{ + const struct compose_seq *cs1 = c1; + const struct compose_seq *cs2 = c2; + int i; + + for (i = 0; cs1->keys[i] != 0 && cs2->keys[i] != 0; i++) { + if (cs1->keys[i] != cs2->keys[i]) + return cs1->keys[i] - cs2->keys[i]; + } + + if (cs1->keys[i] == cs2->keys[i] + || cs1->keys[i] == 0) + return 0; + + return cs1->keys[i] - cs2->keys[i]; +} + +static void +simple_im_key_handler(struct keyboard_input *keyboard_input, + uint32_t time, uint32_t key, uint32_t sym, + enum wl_keyboard_key_state state, void *data) +{ + struct simple_im *keyboard = data; + struct input_method_context *context = keyboard->context; + char text[64]; + + if (sym == XKB_KEY_Multi_key && + state == WL_KEYBOARD_KEY_STATE_RELEASED && + keyboard->compose_state == state_normal) { + keyboard->compose_state = state_compose; + memset(&keyboard->compose_seq, 0, sizeof(struct compose_seq)); + return; + } + + if (keyboard->compose_state == state_compose) { + uint32_t i = 0; + struct compose_seq *cs; + + if (state == WL_KEYBOARD_KEY_STATE_PRESSED) + return; + + for (i = 0; i < sizeof(ignore_keys_on_compose) / sizeof(ignore_keys_on_compose[0]); i++) { + if (sym == ignore_keys_on_compose[i]) { + input_method_context_key(context, display_get_serial(keyboard->display), time, key, state); + return; + } + } + + for (i = 0; keyboard->compose_seq.keys[i] != 0; i++); + + keyboard->compose_seq.keys[i] = sym; + + cs = bsearch (&keyboard->compose_seq, compose_seqs, + sizeof(compose_seqs) / sizeof(compose_seqs[0]), + sizeof(compose_seqs[0]), compare_compose_keys); + + if (cs) { + if (cs->keys[i + 1] == 0) { + input_method_context_preedit_string(keyboard->context, + "", 0); + input_method_context_commit_string(keyboard->context, + cs->text, + strlen(cs->text)); + keyboard->compose_state = state_normal; + } else { + uint32_t j = 0, idx = 0; + + for (; j <= i; j++) { + idx += xkb_keysym_to_utf8(cs->keys[j], text + idx, sizeof(text) - idx); + } + + input_method_context_preedit_string(keyboard->context, + text, + strlen(text)); + } + } else { + uint32_t j = 0, idx = 0; + + for (; j <= i; j++) { + idx += xkb_keysym_to_utf8(keyboard->compose_seq.keys[j], text + idx, sizeof(text) - idx); + } + input_method_context_preedit_string(keyboard->context, + "", 0); + input_method_context_commit_string(keyboard->context, + text, + strlen(text)); + keyboard->compose_state = state_normal; + } + return; + } + + if (xkb_keysym_to_utf8(sym, text, sizeof(text)) <= 0) { + input_method_context_key(context, display_get_serial(keyboard->display), time, key, state); + return; + } + + if (state == WL_KEYBOARD_KEY_STATE_PRESSED) + return; + + input_method_context_commit_string(keyboard->context, + text, + strlen(text)); +} + +int +main(int argc, char *argv[]) +{ + struct simple_im simple_im; + + memset(&simple_im, 0, sizeof(simple_im)); + + simple_im.display = display_create(argc, argv); + if (simple_im.display == NULL) { + fprintf(stderr, "failed to create display: %m\n"); + return -1; + } + + simple_im.context = NULL; + simple_im.keyboard_input = keyboard_input_create(display_get_xkb_context(simple_im.display)); + keyboard_input_set_user_data(simple_im.keyboard_input, &simple_im); + keyboard_input_set_key_handler(simple_im.keyboard_input, simple_im_key_handler); + + display_set_user_data(simple_im.display, &simple_im); + display_set_global_handler(simple_im.display, global_handler); + + display_run(simple_im.display); + + return 0; +}