1 files changed, 518 insertions, 0 deletions

diff --git a/clients/weston-simple-im.c b/clients/weston-simple-im.c
new file mode 100644
index 00000000..ded6a04d
--- /dev/null
+++ b/clients/weston-simple-im.c
@@ -0,0 +1,518 @@
+/*
+ * 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 <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+
+#include <linux/input.h>
+
+#include "window.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;
+
+typedef void (*keyboard_input_key_handler_t)(struct simple_im *keyboard,
+					     uint32_t serial,
+					     uint32_t time, uint32_t key, uint32_t unicode,
+					     enum wl_keyboard_key_state state);
+
+struct simple_im {
+	struct wl_input_method *input_method;
+	struct wl_input_method_context *context;
+	struct wl_display *display;
+	struct wl_registry *registry;
+	struct wl_keyboard *keyboard;
+	enum compose_state compose_state;
+	struct compose_seq compose_seq;
+
+	struct xkb_context *xkb_context;
+
+	uint32_t modifiers;
+
+	struct xkb_keymap *keymap;
+	struct xkb_state *state;
+	xkb_mod_mask_t control_mask;
+	xkb_mod_mask_t alt_mask;
+	xkb_mod_mask_t shift_mask;
+
+	keyboard_input_key_handler_t key_handler;
+
+	uint32_t serial;
+};
+
+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_slash, XKB_KEY_O, 0 },     "Ø" },
+	{ { XKB_KEY_slash, XKB_KEY_o, 0 },     "ø" },
+	{ { XKB_KEY_less, XKB_KEY_3, 0 },  "♥" },
+	{ { XKB_KEY_A, XKB_KEY_A, 0 },  "Å" },
+	{ { XKB_KEY_A, XKB_KEY_E, 0 },  "Æ" },
+	{ { XKB_KEY_O, XKB_KEY_C, 0 },  "©" },
+	{ { XKB_KEY_O, XKB_KEY_R, 0 },  "®" },
+	{ { XKB_KEY_s, XKB_KEY_s, 0 },  "ß" },
+	{ { XKB_KEY_a, XKB_KEY_e, 0 },  "æ" },
+	{ { XKB_KEY_a, XKB_KEY_a, 0 },  "å" },
+};
+
+static const uint32_t ignore_keys_on_compose[] = {
+	XKB_KEY_Shift_L,
+	XKB_KEY_Shift_R
+};
+
+static void
+handle_surrounding_text(void *data,
+			struct wl_input_method_context *context,
+			const char *text,
+			uint32_t cursor,
+			uint32_t anchor)
+{
+	fprintf(stderr, "Surrounding text updated: %s\n", text);
+}
+
+static void
+handle_reset(void *data,
+	     struct wl_input_method_context *context)
+{
+	struct simple_im *keyboard = data;
+
+	fprintf(stderr, "Reset pre-edit buffer\n");
+
+	keyboard->compose_state = state_normal;
+}
+
+static void
+handle_content_type(void *data,
+		    struct wl_input_method_context *context,
+		    uint32_t hint,
+		    uint32_t purpose)
+{
+}
+
+static void
+handle_invoke_action(void *data,
+		     struct wl_input_method_context *context,
+		     uint32_t button,
+		     uint32_t index)
+{
+}
+
+static void
+handle_commit_state(void *data,
+		    struct wl_input_method_context *context,
+		    uint32_t serial)
+{
+	struct simple_im *keyboard = data;
+
+	keyboard->serial = serial;
+}
+
+static void
+handle_preferred_language(void *data,
+			  struct wl_input_method_context *context,
+			  const char *language)
+{
+}
+
+static const struct wl_input_method_context_listener input_method_context_listener = {
+	handle_surrounding_text,
+	handle_reset,
+	handle_content_type,
+	handle_invoke_action,
+	handle_commit_state,
+	handle_preferred_language
+};
+
+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;
+	char *map_str;
+
+	if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1) {
+		close(fd);
+		return;
+	}
+
+	map_str = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
+	if (map_str == MAP_FAILED) {
+		close(fd);
+		return;
+	}
+
+	keyboard->keymap =
+		xkb_map_new_from_string(keyboard->xkb_context,
+					map_str,
+					XKB_KEYMAP_FORMAT_TEXT_V1,
+					0);
+
+	munmap(map_str, size);
+	close(fd);
+
+	if (!keyboard->keymap) {
+		fprintf(stderr, "failed to compile keymap\n");
+		return;
+	}
+
+	keyboard->state = xkb_state_new(keyboard->keymap);
+	if (!keyboard->state) {
+		fprintf(stderr, "failed to create XKB state\n");
+		xkb_map_unref(keyboard->keymap);
+		return;
+	}
+
+	keyboard->control_mask =
+		1 << xkb_map_mod_get_index(keyboard->keymap, "Control");
+	keyboard->alt_mask =
+		1 << xkb_map_mod_get_index(keyboard->keymap, "Mod1");
+	keyboard->shift_mask =
+		1 << xkb_map_mod_get_index(keyboard->keymap, "Shift");
+}
+
+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;
+	uint32_t code;
+	uint32_t num_syms;
+	const xkb_keysym_t *syms;
+	xkb_keysym_t sym;
+	enum wl_keyboard_key_state state = state_w;
+
+	if (!keyboard->state)
+		return;
+
+	code = key + 8;
+	num_syms = xkb_key_get_syms(keyboard->state, code, &syms);
+
+	sym = XKB_KEY_NoSymbol;
+	if (num_syms == 1)
+		sym = syms[0];
+
+	if (keyboard->key_handler)
+		(*keyboard->key_handler)(keyboard, serial, time, key, sym,
+					 state);
+}
+
+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 wl_input_method_context *context = keyboard->context;
+	xkb_mod_mask_t mask;
+
+	xkb_state_update_mask(keyboard->state, mods_depressed,
+			      mods_latched, mods_locked, 0, 0, group);
+	mask = xkb_state_serialize_mods(keyboard->state,
+					XKB_STATE_DEPRESSED |
+					XKB_STATE_LATCHED);
+
+	keyboard->modifiers = 0;
+	if (mask & keyboard->control_mask)
+		keyboard->modifiers |= MOD_CONTROL_MASK;
+	if (mask & keyboard->alt_mask)
+		keyboard->modifiers |= MOD_ALT_MASK;
+	if (mask & keyboard->shift_mask)
+		keyboard->modifiers |= MOD_SHIFT_MASK;
+
+	wl_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 wl_input_method *input_method,
+		      struct wl_input_method_context *context)
+{
+	struct simple_im *keyboard = data;
+
+	if (keyboard->context)
+		wl_input_method_context_destroy(keyboard->context);
+
+	keyboard->compose_state = state_normal;
+
+	keyboard->serial = 0;
+
+	keyboard->context = context;
+	wl_input_method_context_add_listener(context,
+					     &input_method_context_listener,
+					     keyboard);
+	keyboard->keyboard = wl_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 wl_input_method *input_method,
+			struct wl_input_method_context *context)
+{
+	struct simple_im *keyboard = data;
+
+	if (!keyboard->context)
+		return;
+
+	wl_input_method_context_destroy(keyboard->context);
+	keyboard->context = NULL;
+}
+
+static const struct wl_input_method_listener input_method_listener = {
+	input_method_activate,
+	input_method_deactivate
+};
+
+static void
+registry_handle_global(void *data, struct wl_registry *registry,
+		       uint32_t name, const char *interface, uint32_t version)
+{
+	struct simple_im *keyboard = data;
+
+	if (!strcmp(interface, "wl_input_method")) {
+		keyboard->input_method =
+			wl_registry_bind(registry, name,
+					 &wl_input_method_interface, 1);
+		wl_input_method_add_listener(keyboard->input_method,
+					     &input_method_listener, keyboard);
+	}
+}
+
+static void
+registry_handle_global_remove(void *data, struct wl_registry *registry,
+			      uint32_t name)
+{
+}
+
+static const struct wl_registry_listener registry_listener = {
+	registry_handle_global,
+	registry_handle_global_remove
+};
+
+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 simple_im *keyboard,
+		      uint32_t serial, uint32_t time, uint32_t key, uint32_t sym,
+		      enum wl_keyboard_key_state state)
+{
+	struct wl_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]) {
+				wl_input_method_context_key(context, keyboard->serial, 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) {
+				wl_input_method_context_preedit_cursor(keyboard->context,
+								       0);
+				wl_input_method_context_preedit_string(keyboard->context,
+								       keyboard->serial,
+								       "", "");
+				wl_input_method_context_cursor_position(keyboard->context,
+									0, 0);
+				wl_input_method_context_commit_string(keyboard->context,
+								      keyboard->serial,
+								      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);
+				}
+
+				wl_input_method_context_preedit_cursor(keyboard->context,
+								       strlen(text));
+				wl_input_method_context_preedit_string(keyboard->context,
+								       keyboard->serial,
+								       text,
+								       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);
+			}
+			wl_input_method_context_preedit_cursor(keyboard->context,
+							       0);
+			wl_input_method_context_preedit_string(keyboard->context,
+							       keyboard->serial,
+							       "", "");
+			wl_input_method_context_cursor_position(keyboard->context,
+								0, 0);
+			wl_input_method_context_commit_string(keyboard->context,
+							      keyboard->serial,
+							      text);
+			keyboard->compose_state = state_normal;
+		}
+		return;
+	}
+
+	if (xkb_keysym_to_utf8(sym, text, sizeof(text)) <= 0) {
+		wl_input_method_context_key(context, serial, time, key, state);
+		return;
+	}
+
+	if (state == WL_KEYBOARD_KEY_STATE_PRESSED)
+		return;
+
+	wl_input_method_context_cursor_position(keyboard->context,
+						0, 0);
+	wl_input_method_context_commit_string(keyboard->context,
+					      keyboard->serial,
+					      text);
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct simple_im simple_im;
+	int ret = 0;
+
+	memset(&simple_im, 0, sizeof(simple_im));
+
+	simple_im.display = wl_display_connect(NULL);
+	if (simple_im.display == NULL) {
+		fprintf(stderr, "failed to connect to server: %m\n");
+		return -1;
+	}
+
+	simple_im.registry = wl_display_get_registry(simple_im.display);
+	wl_registry_add_listener(simple_im.registry,
+				 &registry_listener, &simple_im);
+	wl_display_roundtrip(simple_im.display);
+	if (simple_im.input_method == NULL) {
+		fprintf(stderr, "No input_method global\n");
+		exit(1);
+	}
+
+	simple_im.xkb_context = xkb_context_new(0);
+	if (simple_im.xkb_context == NULL) {
+		fprintf(stderr, "Failed to create XKB context\n");
+		return -1;
+	}
+
+	simple_im.context = NULL;
+	simple_im.key_handler =  simple_im_key_handler;
+
+	while (ret != -1)
+		ret = wl_display_dispatch(simple_im.display);
+
+	if (ret == -1) {
+		fprintf(stderr, "Dispatch error: %m\n");
+		exit(1);
+	}
+
+	return 0;
+}