[PATCH 15/15] text: Add simple compose input method
Jan Arne Petersen
jpetersen at openismus.com
Sun Nov 4 18:26:53 PST 2012
From: Jan Arne Petersen <jpetersen at openismus.com>
Add an input method listening to hardware keyboard input and generating
compose text.
Signed-off-by: Jan Arne Petersen <jpetersen at openismus.com>
---
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 5437de4..3e7cd6c 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 3555228..d552dc7 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 = \
@@ -134,6 +135,14 @@ 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 0000000..6c61fe8
--- /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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <linux/input.h>
+
+#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;
+}
--
1.7.11.7
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