forked from AuroraMiddleware/gtk
1340 lines
38 KiB
C
1340 lines
38 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2000 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk/gdk.h>
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#include <stdlib.h>
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#include <string.h>
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#include "gtkprivate.h"
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#include "gtkaccelgroup.h"
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#include "gtkimcontextsimple.h"
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#include "gtksettings.h"
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#include "gtkwidget.h"
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#include "gtkdebug.h"
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#include "gtkintl.h"
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#include "gtkcomposetable.h"
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#include "gtkimmoduleprivate.h"
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#include "gtkimcontextsimpleseqs.h"
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#include "gdk/gdkeventsprivate.h"
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#include "gdk/gdkprofilerprivate.h"
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/**
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* GtkIMContextSimple:
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*
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* `GtkIMContextSimple` is an input method supporting table-based input methods.
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*
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* ## Compose sequences
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*
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* `GtkIMContextSimple` reads compose sequences from the first of the
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* following files that is found: ~/.config/gtk-4.0/Compose, ~/.XCompose,
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* /usr/share/X11/locale/$locale/Compose (for locales that have a nontrivial
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* Compose file). The syntax of these files is described in the Compose(5)
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* manual page.
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*
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* If none of these files is found, `GtkIMContextSimple` uses a built-in table
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* of compose sequences that is derived from the X11 Compose files.
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*
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* Note that compose sequences typically start with the Compose_key, which is
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* often not available as a dedicated key on keyboards. Keyboard layouts may
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* map this keysym to other keys, such as the right Control key.
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*
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* ## Unicode characters
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*
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* `GtkIMContextSimple` also supports numeric entry of Unicode characters
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* by typing <kbd>Ctrl</kbd>-<kbd>Shift</kbd>-<kbd>u</kbd>, followed by a
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* hexadecimal Unicode codepoint.
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*
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* For example,
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*
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* Ctrl-Shift-u 1 2 3 Enter
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*
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* yields U+0123 LATIN SMALL LETTER G WITH CEDILLA, i.e. ģ.
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*
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* ## Dead keys
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*
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* `GtkIMContextSimple` supports dead keys. For example, typing
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*
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* dead_acute a
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*
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* yields U+00E! LATIN SMALL LETTER_A WITH ACUTE, i.e. á. Note that this
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* depends on the keyboard layout including dead keys.
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*/
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struct _GtkIMContextSimplePrivate
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{
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guint *compose_buffer;
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int compose_buffer_len;
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GString *tentative_match;
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int tentative_match_len;
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guint in_hex_sequence : 1;
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guint in_compose_sequence : 1;
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guint modifiers_dropped : 1;
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};
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#include "gtk/compose/gtkcomposedata.h"
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GtkComposeTable builtin_compose_table = {
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NULL,
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NULL,
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MAX_SEQ_LEN,
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N_INDEX_SIZE,
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DATA_SIZE,
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N_CHARS,
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0
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};
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static void
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init_builtin_table (void)
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{
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GBytes *bytes;
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bytes = g_resources_lookup_data ("/org/gtk/libgtk/compose/sequences", 0, NULL);
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builtin_compose_table.data = (guint16 *) g_bytes_get_data (bytes, NULL);
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g_bytes_unref (bytes);
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bytes = g_resources_lookup_data ("/org/gtk/libgtk/compose/chars", 0, NULL);
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builtin_compose_table.char_data = (char *) g_bytes_get_data (bytes, NULL);
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g_bytes_unref (bytes);
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}
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G_LOCK_DEFINE_STATIC (global_tables);
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static GSList *global_tables;
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static const guint gtk_compose_ignore[] = {
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0, /* Yes, XKB will send us key press events with NoSymbol :( */
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GDK_KEY_Overlay1_Enable,
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GDK_KEY_Overlay2_Enable,
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GDK_KEY_Shift_L,
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GDK_KEY_Shift_R,
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GDK_KEY_Control_L,
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GDK_KEY_Control_R,
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GDK_KEY_Caps_Lock,
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GDK_KEY_Shift_Lock,
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GDK_KEY_Meta_L,
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GDK_KEY_Meta_R,
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GDK_KEY_Alt_L,
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GDK_KEY_Alt_R,
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GDK_KEY_Super_L,
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GDK_KEY_Super_R,
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GDK_KEY_Hyper_L,
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GDK_KEY_Hyper_R,
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GDK_KEY_Mode_switch,
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GDK_KEY_ISO_Level3_Shift,
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GDK_KEY_ISO_Level3_Latch,
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GDK_KEY_ISO_Level5_Shift,
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GDK_KEY_ISO_Level5_Latch
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};
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static void gtk_im_context_simple_finalize (GObject *obj);
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static gboolean gtk_im_context_simple_filter_keypress (GtkIMContext *context,
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GdkEvent *key);
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static void gtk_im_context_simple_reset (GtkIMContext *context);
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static void gtk_im_context_simple_get_preedit_string (GtkIMContext *context,
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char **str,
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PangoAttrList **attrs,
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int *cursor_pos);
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static void init_compose_table_async (GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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G_DEFINE_TYPE_WITH_CODE (GtkIMContextSimple, gtk_im_context_simple, GTK_TYPE_IM_CONTEXT,
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G_ADD_PRIVATE (GtkIMContextSimple)
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gtk_im_module_ensure_extension_point ();
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g_io_extension_point_implement (GTK_IM_MODULE_EXTENSION_POINT_NAME,
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g_define_type_id,
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"gtk-im-context-simple",
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G_MININT))
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static void
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gtk_im_context_simple_class_init (GtkIMContextSimpleClass *class)
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{
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GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (class);
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GObjectClass *gobject_class = G_OBJECT_CLASS (class);
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im_context_class->filter_keypress = gtk_im_context_simple_filter_keypress;
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im_context_class->reset = gtk_im_context_simple_reset;
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im_context_class->get_preedit_string = gtk_im_context_simple_get_preedit_string;
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gobject_class->finalize = gtk_im_context_simple_finalize;
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init_builtin_table ();
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init_compose_table_async (NULL, NULL, NULL);
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}
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static char *
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get_x11_compose_file_dir (void)
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{
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char * compose_file_dir;
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#if defined (X11_DATA_PREFIX)
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compose_file_dir = g_strdup (X11_DATA_PREFIX "/share/X11/locale");
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#else
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compose_file_dir = g_build_filename (_gtk_get_datadir (), "X11", "locale", NULL);
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#endif
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return compose_file_dir;
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}
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static int
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gtk_compose_table_find (gconstpointer data1,
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gconstpointer data2)
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{
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const GtkComposeTable *compose_table = (const GtkComposeTable *) data1;
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guint32 hash = (guint32) GPOINTER_TO_INT (data2);
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return compose_table->id != hash;
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}
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static gboolean
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add_compose_table_from_file (const char *compose_file)
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{
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guint hash;
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gboolean ret = FALSE;
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G_LOCK (global_tables);
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hash = g_str_hash (compose_file);
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if (!g_slist_find_custom (global_tables, GINT_TO_POINTER (hash), gtk_compose_table_find))
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{
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GtkComposeTable *table;
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table = gtk_compose_table_new_with_file (compose_file);
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if (table)
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{
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ret = TRUE;
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global_tables = g_slist_prepend (global_tables, table);
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}
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}
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G_UNLOCK (global_tables);
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return ret;
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}
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static void
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add_builtin_compose_table (void)
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{
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G_LOCK (global_tables);
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global_tables = g_slist_prepend (global_tables, &builtin_compose_table);
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G_UNLOCK (global_tables);
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}
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static void
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add_compose_table_from_data (guint16 *data,
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int max_seq_len,
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int n_seqs)
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{
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guint hash;
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G_LOCK (global_tables);
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hash = gtk_compose_table_data_hash (data, max_seq_len, n_seqs);
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if (!g_slist_find_custom (global_tables, GINT_TO_POINTER (hash), gtk_compose_table_find))
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{
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GtkComposeTable *table;
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table = gtk_compose_table_new_with_data (data, max_seq_len, n_seqs);
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if (table)
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global_tables = g_slist_prepend (global_tables, table);
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}
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G_UNLOCK (global_tables);
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}
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static void
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gtk_im_context_simple_init_compose_table (void)
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{
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char *path = NULL;
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const char *home;
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const char *locale;
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char **langs = NULL;
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char **lang = NULL;
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const char * const sys_langs[] = { "el_gr", "fi_fi", "pt_br", NULL };
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const char * const *sys_lang = NULL;
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path = g_build_filename (g_get_user_config_dir (), "gtk-4.0", "Compose", NULL);
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if (g_file_test (path, G_FILE_TEST_EXISTS))
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{
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if (add_compose_table_from_file (path))
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{
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g_free (path);
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return;
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}
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}
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g_clear_pointer (&path, g_free);
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home = g_get_home_dir ();
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if (home == NULL)
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return;
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path = g_build_filename (home, ".XCompose", NULL);
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if (g_file_test (path, G_FILE_TEST_EXISTS))
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{
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if (add_compose_table_from_file (path))
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{
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g_free (path);
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return;
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}
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}
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g_clear_pointer (&path, g_free);
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locale = g_getenv ("LC_CTYPE");
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if (locale == NULL)
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locale = g_getenv ("LANG");
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if (locale == NULL)
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locale = "C";
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/* FIXME: https://bugzilla.gnome.org/show_bug.cgi?id=751826 */
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langs = g_get_locale_variants (locale);
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for (lang = langs; *lang; lang++)
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{
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if (g_str_has_prefix (*lang, "en_US"))
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break;
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if (**lang == 'C')
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break;
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/* Other languages just include en_us compose table. */
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for (sys_lang = sys_langs; *sys_lang; sys_lang++)
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{
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if (g_ascii_strncasecmp (*lang, *sys_lang, strlen (*sys_lang)) == 0)
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{
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char *x11_compose_file_dir = get_x11_compose_file_dir ();
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path = g_build_filename (x11_compose_file_dir, *lang, "Compose", NULL);
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g_free (x11_compose_file_dir);
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break;
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}
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}
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if (path == NULL)
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continue;
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if (g_file_test (path, G_FILE_TEST_EXISTS))
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break;
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g_clear_pointer (&path, g_free);
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}
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g_strfreev (langs);
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if (path != NULL &&
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add_compose_table_from_file (path))
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{
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g_free (path);
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return;
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}
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g_clear_pointer (&path, g_free);
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add_builtin_compose_table ();
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}
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static void
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init_compose_table_thread_cb (GTask *task,
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gpointer source_object,
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gpointer task_data,
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GCancellable *cancellable)
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{
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gint64 before G_GNUC_UNUSED;
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before = GDK_PROFILER_CURRENT_TIME;
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if (g_task_return_error_if_cancelled (task))
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return;
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gtk_im_context_simple_init_compose_table ();
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gdk_profiler_end_mark (before, "im compose table load (thread)", NULL);
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}
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static void
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init_compose_table_async (GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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GTask *task = g_task_new (NULL, cancellable, callback, user_data);
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g_task_set_source_tag (task, init_compose_table_async);
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g_task_run_in_thread (task, init_compose_table_thread_cb);
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g_object_unref (task);
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}
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static void
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gtk_im_context_simple_init (GtkIMContextSimple *context_simple)
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{
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GtkIMContextSimplePrivate *priv;
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priv = context_simple->priv = gtk_im_context_simple_get_instance_private (context_simple);
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priv->compose_buffer_len = builtin_compose_table.max_seq_len + 1;
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priv->compose_buffer = g_new0 (guint, priv->compose_buffer_len);
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priv->tentative_match = g_string_new ("");
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priv->tentative_match_len = 0;
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}
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static void
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gtk_im_context_simple_finalize (GObject *obj)
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{
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GtkIMContextSimple *context_simple = GTK_IM_CONTEXT_SIMPLE (obj);
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GtkIMContextSimplePrivate *priv = context_simple->priv;;
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g_free (priv->compose_buffer);
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g_string_free (priv->tentative_match, TRUE);
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G_OBJECT_CLASS (gtk_im_context_simple_parent_class)->finalize (obj);
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}
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/**
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* gtk_im_context_simple_new:
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*
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* Creates a new `GtkIMContextSimple`.
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*
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* Returns: a new `GtkIMContextSimple`
|
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*/
|
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GtkIMContext *
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gtk_im_context_simple_new (void)
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{
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return g_object_new (GTK_TYPE_IM_CONTEXT_SIMPLE, NULL);
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}
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static void
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gtk_im_context_simple_commit_string (GtkIMContextSimple *context_simple,
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const char *str)
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{
|
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GtkIMContextSimplePrivate *priv = context_simple->priv;
|
||
|
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if (priv->in_hex_sequence ||
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priv->tentative_match_len > 0 ||
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priv->compose_buffer[0] != 0)
|
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{
|
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g_string_set_size (priv->tentative_match, 0);
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priv->tentative_match_len = 0;
|
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priv->in_hex_sequence = FALSE;
|
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priv->in_compose_sequence = FALSE;
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priv->compose_buffer[0] = 0;
|
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|
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g_signal_emit_by_name (context_simple, "preedit-changed");
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g_signal_emit_by_name (context_simple, "preedit-end");
|
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}
|
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g_signal_emit_by_name (context_simple, "commit", str);
|
||
}
|
||
|
||
static void
|
||
gtk_im_context_simple_commit_char (GtkIMContextSimple *context_simple,
|
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gunichar ch)
|
||
{
|
||
char buf[8] = { 0, };
|
||
|
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g_unichar_to_utf8 (ch, buf);
|
||
|
||
gtk_im_context_simple_commit_string (context_simple, buf);
|
||
}
|
||
|
||
/* In addition to the table-driven sequences, we allow Unicode hex
|
||
* codes to be entered. The method chosen here is similar to the
|
||
* one recommended in ISO 14755, but not exactly the same, since we
|
||
* don’t want to steal 16 valuable key combinations.
|
||
*
|
||
* A hex Unicode sequence must be started with Ctrl-Shift-U, followed
|
||
* by a sequence of hex digits entered with Ctrl-Shift still held.
|
||
* Releasing one of the modifiers or pressing space while the modifiers
|
||
* are still held commits the character. It is possible to erase
|
||
* digits using backspace.
|
||
*
|
||
* As an extension to the above, we also allow to start the sequence
|
||
* with Ctrl-Shift-U, then release the modifiers before typing any
|
||
* digits, and enter the digits without modifiers.
|
||
*/
|
||
|
||
static gboolean
|
||
check_hex (GtkIMContextSimple *context_simple,
|
||
int n_compose)
|
||
{
|
||
GtkIMContextSimplePrivate *priv = context_simple->priv;
|
||
/* See if this is a hex sequence, return TRUE if so */
|
||
int i;
|
||
GString *str;
|
||
gulong n;
|
||
char *nptr = NULL;
|
||
char buf[7];
|
||
|
||
g_string_set_size (priv->tentative_match, 0);
|
||
priv->tentative_match_len = 0;
|
||
|
||
str = g_string_new (NULL);
|
||
|
||
i = 0;
|
||
while (i < n_compose)
|
||
{
|
||
gunichar ch;
|
||
|
||
ch = gdk_keyval_to_unicode (priv->compose_buffer[i]);
|
||
|
||
if (ch == 0)
|
||
return FALSE;
|
||
|
||
if (!g_unichar_isxdigit (ch))
|
||
return FALSE;
|
||
|
||
buf[g_unichar_to_utf8 (ch, buf)] = '\0';
|
||
|
||
g_string_append (str, buf);
|
||
|
||
++i;
|
||
}
|
||
|
||
n = strtoul (str->str, &nptr, 16);
|
||
|
||
/* If strtoul fails it probably means non-latin digits were used;
|
||
* we should in principle handle that, but we probably don't.
|
||
*/
|
||
if (nptr - str->str < str->len)
|
||
{
|
||
g_string_free (str, TRUE);
|
||
return FALSE;
|
||
}
|
||
else
|
||
g_string_free (str, TRUE);
|
||
|
||
if (g_unichar_validate (n))
|
||
{
|
||
g_string_set_size (priv->tentative_match, 0);
|
||
g_string_append_unichar (priv->tentative_match, n);
|
||
priv->tentative_match_len = n_compose;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static void
|
||
beep_surface (GdkSurface *surface)
|
||
{
|
||
GdkDisplay *display = gdk_surface_get_display (surface);
|
||
gboolean beep;
|
||
|
||
g_object_get (gtk_settings_get_for_display (display),
|
||
"gtk-error-bell", &beep,
|
||
NULL);
|
||
|
||
if (beep)
|
||
gdk_surface_beep (surface);
|
||
}
|
||
|
||
static inline gboolean
|
||
is_dead_key (guint keysym)
|
||
{
|
||
return GDK_KEY_dead_grave <= keysym && keysym <= GDK_KEY_dead_greek;
|
||
}
|
||
|
||
static void
|
||
append_dead_key (GString *string,
|
||
guint keysym)
|
||
{
|
||
/* Sadly, not all the dead keysyms have spacing mark equivalents
|
||
* in Unicode. For those that don't, we use NBSP + the non-spacing
|
||
* mark as an approximation.
|
||
*/
|
||
switch (keysym)
|
||
{
|
||
#define CASE(keysym, unicode, sp) \
|
||
case GDK_KEY_dead_##keysym: \
|
||
if (sp) \
|
||
g_string_append_unichar (string, 0xA0); \
|
||
g_string_append_unichar (string, unicode); \
|
||
break;
|
||
|
||
CASE (grave, 0x60, 0);
|
||
CASE (acute, 0xb4, 0);
|
||
CASE (circumflex, 0x5e, 0);
|
||
CASE (tilde, 0x7e, 0);
|
||
CASE (macron, 0xaf, 0);
|
||
CASE (breve, 0x2d8, 0);
|
||
CASE (abovedot, 0x307, 1);
|
||
CASE (diaeresis, 0xa8, 0);
|
||
CASE (abovering, 0x2da, 0);
|
||
CASE (hook, 0x2c0, 0);
|
||
CASE (doubleacute, 0x2dd, 0);
|
||
CASE (caron, 0x2c7, 0);
|
||
CASE (cedilla, 0xb8, 0);
|
||
CASE (ogonek, 0x2db, 0);
|
||
CASE (iota, 0x37a, 0);
|
||
CASE (voiced_sound, 0x3099, 1);
|
||
CASE (semivoiced_sound, 0x309a, 1);
|
||
CASE (belowdot, 0x323, 1);
|
||
CASE (horn, 0x31b, 1);
|
||
CASE (stroke, 0x335, 1);
|
||
CASE (abovecomma, 0x2bc, 0);
|
||
CASE (abovereversedcomma, 0x2bd, 1);
|
||
CASE (doublegrave, 0x30f, 1);
|
||
CASE (belowring, 0x2f3, 0);
|
||
CASE (belowmacron, 0x2cd, 0);
|
||
CASE (belowcircumflex, 0x32d, 1);
|
||
CASE (belowtilde, 0x330, 1);
|
||
CASE (belowbreve, 0x32e, 1);
|
||
CASE (belowdiaeresis, 0x324, 1);
|
||
CASE (invertedbreve, 0x32f, 1);
|
||
CASE (belowcomma, 0x326, 1);
|
||
CASE (lowline, 0x5f, 0);
|
||
CASE (aboveverticalline, 0x2c8, 0);
|
||
CASE (belowverticalline, 0x2cc, 0);
|
||
CASE (longsolidusoverlay, 0x338, 1);
|
||
CASE (a, 0x363, 1);
|
||
CASE (A, 0x363, 1);
|
||
CASE (e, 0x364, 1);
|
||
CASE (E, 0x364, 1);
|
||
CASE (i, 0x365, 1);
|
||
CASE (I, 0x365, 1);
|
||
CASE (o, 0x366, 1);
|
||
CASE (O, 0x366, 1);
|
||
CASE (u, 0x367, 1);
|
||
CASE (U, 0x367, 1);
|
||
CASE (small_schwa, 0x1dea, 1);
|
||
CASE (capital_schwa, 0x1dea, 1);
|
||
#undef CASE
|
||
default:
|
||
g_string_append_unichar (string, gdk_keyval_to_unicode (keysym));
|
||
}
|
||
}
|
||
|
||
static gboolean
|
||
no_sequence_matches (GtkIMContextSimple *context_simple,
|
||
int n_compose,
|
||
GdkEvent *event)
|
||
{
|
||
GtkIMContextSimplePrivate *priv = context_simple->priv;
|
||
GtkIMContext *context;
|
||
gunichar ch;
|
||
guint keyval;
|
||
|
||
context = GTK_IM_CONTEXT (context_simple);
|
||
|
||
priv->in_compose_sequence = FALSE;
|
||
|
||
/* No compose sequences found, check first if we have a partial
|
||
* match pending.
|
||
*/
|
||
if (priv->tentative_match_len > 0)
|
||
{
|
||
int len = priv->tentative_match_len;
|
||
int i;
|
||
guint *compose_buffer;
|
||
char *str;
|
||
|
||
compose_buffer = alloca (sizeof (guint) * priv->compose_buffer_len);
|
||
|
||
memcpy (compose_buffer, priv->compose_buffer, sizeof (guint) * priv->compose_buffer_len);
|
||
|
||
str = g_strdup (priv->tentative_match->str);
|
||
gtk_im_context_simple_commit_string (context_simple, str);
|
||
g_free (str);
|
||
|
||
for (i = 0; i < n_compose - len - 1; i++)
|
||
{
|
||
GdkTranslatedKey translated;
|
||
translated.keyval = compose_buffer[len + i];
|
||
translated.consumed = 0;
|
||
translated.layout = 0;
|
||
translated.level = 0;
|
||
GdkEvent *tmp_event = gdk_key_event_new (GDK_KEY_PRESS,
|
||
gdk_event_get_surface (event),
|
||
gdk_event_get_device (event),
|
||
gdk_event_get_time (event),
|
||
compose_buffer[len + i],
|
||
gdk_event_get_modifier_state (event),
|
||
FALSE,
|
||
&translated,
|
||
&translated);
|
||
|
||
gtk_im_context_filter_keypress (context, tmp_event);
|
||
gdk_event_unref (tmp_event);
|
||
}
|
||
|
||
return gtk_im_context_filter_keypress (context, event);
|
||
}
|
||
else
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < n_compose && is_dead_key (priv->compose_buffer[i]); i++)
|
||
;
|
||
|
||
if (n_compose > 1 && i >= n_compose - 1)
|
||
{
|
||
GString *s;
|
||
|
||
s = g_string_new ("");
|
||
|
||
if (i == n_compose - 1)
|
||
{
|
||
/* dead keys are never *really* dead */
|
||
for (int j = 0; j < i; j++)
|
||
append_dead_key (s, priv->compose_buffer[j]);
|
||
|
||
ch = gdk_keyval_to_unicode (priv->compose_buffer[i]);
|
||
if (ch != 0 && ch != ' ' && !g_unichar_iscntrl (ch))
|
||
g_string_append_unichar (s, ch);
|
||
|
||
gtk_im_context_simple_commit_string (context_simple, s->str);
|
||
}
|
||
else
|
||
{
|
||
append_dead_key (s, priv->compose_buffer[0]);
|
||
gtk_im_context_simple_commit_string (context_simple, s->str);
|
||
|
||
for (i = 1; i < n_compose; i++)
|
||
priv->compose_buffer[i - 1] = priv->compose_buffer[i];
|
||
priv->compose_buffer[n_compose - 1] = 0;
|
||
|
||
priv->in_compose_sequence = TRUE;
|
||
|
||
g_signal_emit_by_name (context, "preedit-start");
|
||
g_signal_emit_by_name (context, "preedit-changed");
|
||
}
|
||
|
||
g_string_free (s, TRUE);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
priv->compose_buffer[0] = 0;
|
||
if (n_compose > 1) /* Invalid sequence */
|
||
{
|
||
beep_surface (gdk_event_get_surface (event));
|
||
g_signal_emit_by_name (context, "preedit-changed");
|
||
g_signal_emit_by_name (context, "preedit-end");
|
||
return TRUE;
|
||
}
|
||
|
||
keyval = gdk_key_event_get_keyval (event);
|
||
ch = gdk_keyval_to_unicode (keyval);
|
||
if (ch != 0 && !g_unichar_iscntrl (ch))
|
||
{
|
||
gtk_im_context_simple_commit_char (context_simple, ch);
|
||
return TRUE;
|
||
}
|
||
else
|
||
return FALSE;
|
||
}
|
||
return FALSE;
|
||
}
|
||
|
||
static gboolean
|
||
is_hex_keyval (guint keyval)
|
||
{
|
||
gunichar ch = gdk_keyval_to_unicode (keyval);
|
||
|
||
return g_unichar_isxdigit (ch);
|
||
}
|
||
|
||
static guint
|
||
canonical_hex_keyval (GdkEvent *event)
|
||
{
|
||
guint keyval, event_keyval;
|
||
guint *keyvals = NULL;
|
||
int n_vals = 0;
|
||
int i;
|
||
|
||
event_keyval = gdk_key_event_get_keyval (event);
|
||
|
||
/* See if the keyval is already a hex digit */
|
||
if (is_hex_keyval (event_keyval))
|
||
return event_keyval;
|
||
|
||
/* See if this key would have generated a hex keyval in
|
||
* any other state, and return that hex keyval if so
|
||
*/
|
||
gdk_display_map_keycode (gdk_event_get_display (event),
|
||
gdk_key_event_get_keycode (event),
|
||
NULL,
|
||
&keyvals, &n_vals);
|
||
|
||
keyval = 0;
|
||
i = 0;
|
||
while (i < n_vals)
|
||
{
|
||
if (is_hex_keyval (keyvals[i]))
|
||
{
|
||
keyval = keyvals[i];
|
||
break;
|
||
}
|
||
|
||
++i;
|
||
}
|
||
|
||
g_free (keyvals);
|
||
|
||
if (keyval)
|
||
return keyval;
|
||
else
|
||
/* No way to make it a hex digit
|
||
*/
|
||
return 0;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_im_context_simple_filter_keypress (GtkIMContext *context,
|
||
GdkEvent *event)
|
||
{
|
||
GtkIMContextSimple *context_simple = GTK_IM_CONTEXT_SIMPLE (context);
|
||
GtkIMContextSimplePrivate *priv = context_simple->priv;
|
||
GdkSurface *surface = gdk_event_get_surface ((GdkEvent *) event);
|
||
GSList *tmp_list;
|
||
int n_compose = 0;
|
||
GdkModifierType hex_mod_mask;
|
||
gboolean have_hex_mods;
|
||
gboolean is_hex_start;
|
||
gboolean is_hex_end;
|
||
gboolean is_backspace;
|
||
gboolean is_escape;
|
||
guint hex_keyval;
|
||
int i;
|
||
gboolean compose_finish;
|
||
gboolean compose_match;
|
||
guint keyval, state;
|
||
|
||
while (n_compose < priv->compose_buffer_len && priv->compose_buffer[n_compose] != 0)
|
||
n_compose++;
|
||
|
||
keyval = gdk_key_event_get_keyval (event);
|
||
state = gdk_event_get_modifier_state (event);
|
||
|
||
if (gdk_event_get_event_type (event) == GDK_KEY_RELEASE)
|
||
{
|
||
if (priv->in_hex_sequence &&
|
||
(keyval == GDK_KEY_Control_L || keyval == GDK_KEY_Control_R ||
|
||
keyval == GDK_KEY_Shift_L || keyval == GDK_KEY_Shift_R))
|
||
{
|
||
if (priv->tentative_match->len > 0)
|
||
{
|
||
char *str = g_strdup (priv->tentative_match->str);
|
||
gtk_im_context_simple_commit_string (context_simple, str);
|
||
g_free (str);
|
||
|
||
return TRUE;
|
||
}
|
||
else if (n_compose == 0)
|
||
{
|
||
priv->modifiers_dropped = TRUE;
|
||
|
||
return TRUE;
|
||
}
|
||
else if (priv->in_hex_sequence)
|
||
{
|
||
/* invalid hex sequence */
|
||
beep_surface (surface);
|
||
|
||
g_string_set_size (priv->tentative_match, 0);
|
||
priv->in_hex_sequence = FALSE;
|
||
priv->compose_buffer[0] = 0;
|
||
|
||
g_signal_emit_by_name (context_simple, "preedit-changed");
|
||
g_signal_emit_by_name (context_simple, "preedit-end");
|
||
|
||
return TRUE;
|
||
}
|
||
}
|
||
|
||
if (priv->in_hex_sequence || priv->in_compose_sequence)
|
||
return TRUE; /* Don't leak random key events during preedit */
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/* Ignore modifier key presses */
|
||
for (i = 0; i < G_N_ELEMENTS (gtk_compose_ignore); i++)
|
||
if (keyval == gtk_compose_ignore[i])
|
||
{
|
||
if (priv->in_hex_sequence || priv->in_compose_sequence)
|
||
return TRUE; /* Don't leak random key events during preedit */
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
hex_mod_mask = GDK_CONTROL_MASK|GDK_SHIFT_MASK;
|
||
|
||
if (priv->in_hex_sequence && priv->modifiers_dropped)
|
||
have_hex_mods = TRUE;
|
||
else
|
||
have_hex_mods = (state & (hex_mod_mask)) == hex_mod_mask;
|
||
is_hex_start = keyval == GDK_KEY_U;
|
||
is_hex_end = (keyval == GDK_KEY_space ||
|
||
keyval == GDK_KEY_KP_Space ||
|
||
keyval == GDK_KEY_Return ||
|
||
keyval == GDK_KEY_ISO_Enter ||
|
||
keyval == GDK_KEY_KP_Enter);
|
||
is_backspace = keyval == GDK_KEY_BackSpace;
|
||
is_escape = keyval == GDK_KEY_Escape;
|
||
hex_keyval = canonical_hex_keyval (event);
|
||
|
||
/* If we are already in a non-hex sequence, or
|
||
* this keystroke is not hex modifiers + hex digit, don't filter
|
||
* key events with accelerator modifiers held down. We only treat
|
||
* Control and Alt as accel modifiers here, since Super, Hyper and
|
||
* Meta are often co-located with Mode_Switch, Multi_Key or
|
||
* ISO_Level3_Switch.
|
||
*/
|
||
if (!have_hex_mods ||
|
||
(n_compose > 0 && !priv->in_hex_sequence) ||
|
||
(n_compose == 0 && !priv->in_hex_sequence && !is_hex_start) ||
|
||
(priv->in_hex_sequence && !hex_keyval &&
|
||
!is_hex_start && !is_hex_end && !is_escape && !is_backspace))
|
||
{
|
||
GdkModifierType no_text_input_mask;
|
||
GdkModifierType consumed_modifiers = 0;
|
||
|
||
no_text_input_mask = GDK_ALT_MASK|GDK_CONTROL_MASK;
|
||
|
||
#ifdef G_OS_WIN32
|
||
/* On Win32, even Ctrl + Alt could be text input because AltGr = Ctrl
|
||
* + Alt. For example, Ctrl + Alt + e = € on a German keyboard. The
|
||
* GdkEvent's state, however, reports *all* modifiers that were
|
||
* active at the time the key was pressed, including the ones that
|
||
* were consumed to generate the keyval. So we cannot just assume
|
||
* that any key event containing Ctrl or Alt is a keybinding. We have
|
||
* to first check if those modifiers were actually used to generate
|
||
* the keyval. If so, then the keypress is regular input and we
|
||
* should not exit here.
|
||
*/
|
||
consumed_modifiers = gdk_key_event_get_consumed_modifiers (event);
|
||
#endif
|
||
|
||
if (priv->in_hex_sequence && priv->modifiers_dropped &&
|
||
(keyval == GDK_KEY_Return ||
|
||
keyval == GDK_KEY_ISO_Enter ||
|
||
keyval == GDK_KEY_KP_Enter))
|
||
{
|
||
return FALSE;
|
||
}
|
||
|
||
if (state & no_text_input_mask & ~consumed_modifiers)
|
||
{
|
||
if (priv->in_hex_sequence || priv->in_compose_sequence)
|
||
return TRUE; /* Don't leak random key events during preedit */
|
||
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
/* Handle backspace */
|
||
if (priv->in_hex_sequence && have_hex_mods && is_backspace)
|
||
{
|
||
if (n_compose > 0)
|
||
{
|
||
n_compose--;
|
||
priv->compose_buffer[n_compose] = 0;
|
||
check_hex (context_simple, n_compose);
|
||
}
|
||
else
|
||
{
|
||
priv->in_hex_sequence = FALSE;
|
||
}
|
||
|
||
g_signal_emit_by_name (context_simple, "preedit-changed");
|
||
|
||
if (!priv->in_hex_sequence)
|
||
g_signal_emit_by_name (context_simple, "preedit-end");
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
if (!priv->in_hex_sequence && n_compose > 0 && is_backspace)
|
||
{
|
||
n_compose--;
|
||
priv->compose_buffer[n_compose] = 0;
|
||
|
||
g_signal_emit_by_name (context_simple, "preedit-changed");
|
||
|
||
if (n_compose == 0)
|
||
g_signal_emit_by_name (context_simple, "preedit-end");
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Check for hex sequence restart */
|
||
if (priv->in_hex_sequence && have_hex_mods && is_hex_start)
|
||
{
|
||
if (priv->tentative_match->len > 0)
|
||
{
|
||
char *str = g_strdup (priv->tentative_match->str);
|
||
gtk_im_context_simple_commit_string (context_simple, str);
|
||
g_free (str);
|
||
}
|
||
else
|
||
{
|
||
/* invalid hex sequence */
|
||
if (n_compose > 0)
|
||
beep_surface (surface);
|
||
|
||
g_string_set_size (priv->tentative_match, 0);
|
||
priv->in_hex_sequence = FALSE;
|
||
priv->compose_buffer[0] = 0;
|
||
}
|
||
}
|
||
|
||
/* Check for hex sequence start */
|
||
if (!priv->in_hex_sequence && have_hex_mods && is_hex_start)
|
||
{
|
||
priv->compose_buffer[0] = 0;
|
||
priv->in_hex_sequence = TRUE;
|
||
priv->modifiers_dropped = FALSE;
|
||
g_string_set_size (priv->tentative_match, 0);
|
||
|
||
g_signal_emit_by_name (context_simple, "preedit-start");
|
||
g_signal_emit_by_name (context_simple, "preedit-changed");
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
if (is_escape)
|
||
{
|
||
if (priv->in_hex_sequence || priv->in_compose_sequence)
|
||
{
|
||
gtk_im_context_simple_reset (context);
|
||
return TRUE;
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
if (priv->in_hex_sequence)
|
||
{
|
||
if (hex_keyval && n_compose < 6)
|
||
priv->compose_buffer[n_compose++] = hex_keyval;
|
||
else if (!is_hex_end)
|
||
{
|
||
/* non-hex character in hex sequence, or sequence too long */
|
||
beep_surface (surface);
|
||
return TRUE;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (n_compose + 1 == priv->compose_buffer_len)
|
||
{
|
||
priv->compose_buffer_len += 1;
|
||
priv->compose_buffer = g_renew (guint, priv->compose_buffer, priv->compose_buffer_len);
|
||
}
|
||
|
||
priv->compose_buffer[n_compose++] = keyval;
|
||
}
|
||
|
||
priv->compose_buffer[n_compose] = 0;
|
||
|
||
if (priv->in_hex_sequence)
|
||
{
|
||
/* If the modifiers are still held down, consider the sequence again */
|
||
if (have_hex_mods)
|
||
{
|
||
/* space or return ends the sequence, and we eat the key */
|
||
if (n_compose > 0 && is_hex_end)
|
||
{
|
||
if (priv->tentative_match->len > 0)
|
||
{
|
||
char *str = g_strdup (priv->tentative_match->str);
|
||
gtk_im_context_simple_commit_string (context_simple, str);
|
||
g_free (str);
|
||
|
||
return TRUE;
|
||
}
|
||
else
|
||
{
|
||
/* invalid hex sequence */
|
||
beep_surface (surface);
|
||
|
||
g_string_set_size (priv->tentative_match, 0);
|
||
priv->in_hex_sequence = FALSE;
|
||
priv->compose_buffer[0] = 0;
|
||
}
|
||
}
|
||
else if (!check_hex (context_simple, n_compose))
|
||
beep_surface (surface);
|
||
|
||
g_signal_emit_by_name (context_simple, "preedit-changed");
|
||
|
||
if (!priv->in_hex_sequence)
|
||
g_signal_emit_by_name (context_simple, "preedit-end");
|
||
|
||
return TRUE;
|
||
}
|
||
}
|
||
else /* Then, check for compose sequences */
|
||
{
|
||
gboolean success = FALSE;
|
||
int prefix = 0;
|
||
GString *output;
|
||
|
||
output = g_string_new ("");
|
||
|
||
G_LOCK (global_tables);
|
||
|
||
tmp_list = global_tables;
|
||
while (tmp_list)
|
||
{
|
||
if (gtk_compose_table_check ((GtkComposeTable *)tmp_list->data,
|
||
priv->compose_buffer, n_compose,
|
||
&compose_finish, &compose_match,
|
||
output))
|
||
{
|
||
if (!priv->in_compose_sequence)
|
||
{
|
||
priv->in_compose_sequence = TRUE;
|
||
g_signal_emit_by_name (context_simple, "preedit-start");
|
||
}
|
||
|
||
if (compose_finish)
|
||
{
|
||
if (compose_match)
|
||
gtk_im_context_simple_commit_string (context_simple, output->str);
|
||
}
|
||
else
|
||
{
|
||
if (compose_match)
|
||
{
|
||
g_string_assign (priv->tentative_match, output->str);
|
||
priv->tentative_match_len = n_compose;
|
||
}
|
||
g_signal_emit_by_name (context_simple, "preedit-changed");
|
||
}
|
||
|
||
success = TRUE;
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
int table_prefix;
|
||
|
||
gtk_compose_table_get_prefix ((GtkComposeTable *)tmp_list->data,
|
||
priv->compose_buffer, n_compose,
|
||
&table_prefix);
|
||
|
||
prefix = MAX (prefix, table_prefix);
|
||
}
|
||
|
||
tmp_list = tmp_list->next;
|
||
}
|
||
|
||
G_UNLOCK (global_tables);
|
||
|
||
if (success)
|
||
{
|
||
g_string_free (output, TRUE);
|
||
return TRUE;
|
||
}
|
||
|
||
if (gtk_check_algorithmically (priv->compose_buffer, n_compose, output))
|
||
{
|
||
if (!priv->in_compose_sequence)
|
||
{
|
||
priv->in_compose_sequence = TRUE;
|
||
g_signal_emit_by_name (context_simple, "preedit-start");
|
||
}
|
||
|
||
if (output->len > 0)
|
||
gtk_im_context_simple_commit_string (context_simple, output->str);
|
||
else
|
||
g_signal_emit_by_name (context_simple, "preedit-changed");
|
||
|
||
g_string_free (output, TRUE);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
g_string_free (output, TRUE);
|
||
|
||
/* If we get here, no Compose sequence matched.
|
||
* Only beep if we were in a sequence before.
|
||
*/
|
||
if (prefix > 0)
|
||
{
|
||
for (i = prefix; i < n_compose; i++)
|
||
priv->compose_buffer[i] = 0;
|
||
|
||
beep_surface (gdk_event_get_surface (event));
|
||
|
||
g_signal_emit_by_name (context_simple, "preedit-changed");
|
||
|
||
return TRUE;
|
||
}
|
||
}
|
||
|
||
/* The current compose_buffer doesn't match anything */
|
||
return no_sequence_matches (context_simple, n_compose, (GdkEvent *)event);
|
||
}
|
||
|
||
static void
|
||
gtk_im_context_simple_reset (GtkIMContext *context)
|
||
{
|
||
GtkIMContextSimple *context_simple = GTK_IM_CONTEXT_SIMPLE (context);
|
||
GtkIMContextSimplePrivate *priv = context_simple->priv;
|
||
|
||
priv->compose_buffer[0] = 0;
|
||
|
||
if (priv->tentative_match->len > 0 ||
|
||
priv->in_hex_sequence ||
|
||
priv->in_compose_sequence)
|
||
{
|
||
priv->in_hex_sequence = FALSE;
|
||
priv->in_compose_sequence = FALSE;
|
||
g_string_set_size (priv->tentative_match, 0);
|
||
priv->tentative_match_len = 0;
|
||
g_signal_emit_by_name (context_simple, "preedit-changed");
|
||
g_signal_emit_by_name (context_simple, "preedit-end");
|
||
}
|
||
}
|
||
|
||
static void
|
||
gtk_im_context_simple_get_preedit_string (GtkIMContext *context,
|
||
char **str,
|
||
PangoAttrList **attrs,
|
||
int *cursor_pos)
|
||
{
|
||
GtkIMContextSimple *context_simple = GTK_IM_CONTEXT_SIMPLE (context);
|
||
GtkIMContextSimplePrivate *priv = context_simple->priv;
|
||
GString *s;
|
||
int i;
|
||
|
||
s = g_string_new ("");
|
||
|
||
if (priv->in_hex_sequence)
|
||
{
|
||
g_string_append_c (s, 'u');
|
||
|
||
for (i = 0; priv->compose_buffer[i]; i++)
|
||
g_string_append_unichar (s, gdk_keyval_to_unicode (priv->compose_buffer[i]));
|
||
}
|
||
else if (priv->in_compose_sequence)
|
||
{
|
||
if (priv->tentative_match_len > 0 && priv->compose_buffer[0] != 0)
|
||
{
|
||
g_string_append (s, priv->tentative_match->str);
|
||
}
|
||
else
|
||
{
|
||
for (i = 0; priv->compose_buffer[i]; i++)
|
||
{
|
||
if (priv->compose_buffer[i] == GDK_KEY_Multi_key)
|
||
{
|
||
/* We only show the Compose key visibly when it is the
|
||
* only glyph in the preedit, or when the sequence contains
|
||
* multiple Compose keys, or when it occurs in the
|
||
* middle of the sequence. Sadly, the official character,
|
||
* U+2384, COMPOSITION SYMBOL, is bit too distracting, so
|
||
* we use U+00B7, MIDDLE DOT.
|
||
*/
|
||
if (priv->compose_buffer[1] == 0 || i > 0 ||
|
||
priv->compose_buffer[i + 1] == GDK_KEY_Multi_key)
|
||
g_string_append (s, "·");
|
||
}
|
||
else
|
||
{
|
||
gunichar ch;
|
||
|
||
if (is_dead_key (priv->compose_buffer[i]))
|
||
{
|
||
append_dead_key (s, priv->compose_buffer[i]);
|
||
}
|
||
else
|
||
{
|
||
ch = gdk_keyval_to_unicode (priv->compose_buffer[i]);
|
||
if (ch)
|
||
g_string_append_unichar (s, ch);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (cursor_pos)
|
||
*cursor_pos = g_utf8_strlen (s->str, s->len);
|
||
|
||
if (attrs)
|
||
{
|
||
*attrs = pango_attr_list_new ();
|
||
|
||
if (s->len)
|
||
{
|
||
PangoAttribute *attr;
|
||
|
||
attr = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
|
||
attr->start_index = 0;
|
||
attr->end_index = s->len;
|
||
pango_attr_list_insert (*attrs, attr);
|
||
|
||
attr = pango_attr_fallback_new (TRUE);
|
||
attr->start_index = 0;
|
||
attr->end_index = s->len;
|
||
pango_attr_list_insert (*attrs, attr);
|
||
}
|
||
}
|
||
|
||
if (str)
|
||
*str = g_string_free (s, FALSE);
|
||
}
|
||
|
||
/**
|
||
* gtk_im_context_simple_add_table: (skip)
|
||
* @context_simple: A `GtkIMContextSimple`
|
||
* @data: (array): the table
|
||
* @max_seq_len: Maximum length of a sequence in the table
|
||
* @n_seqs: number of sequences in the table
|
||
*
|
||
* Adds an additional table to search to the input context.
|
||
* Each row of the table consists of @max_seq_len key symbols
|
||
* followed by two #guint16 interpreted as the high and low
|
||
* words of a #gunicode value. Tables are searched starting
|
||
* from the last added.
|
||
*
|
||
* The table must be sorted in dictionary order on the
|
||
* numeric value of the key symbol fields. (Values beyond
|
||
* the length of the sequence should be zero.)
|
||
*
|
||
* Deprecated: 4.4: Use gtk_im_context_simple_add_compose_file()
|
||
*/
|
||
void
|
||
gtk_im_context_simple_add_table (GtkIMContextSimple *context_simple,
|
||
guint16 *data,
|
||
int max_seq_len,
|
||
int n_seqs)
|
||
{
|
||
g_return_if_fail (GTK_IS_IM_CONTEXT_SIMPLE (context_simple));
|
||
|
||
add_compose_table_from_data (data, max_seq_len, n_seqs);
|
||
}
|
||
|
||
/**
|
||
* gtk_im_context_simple_add_compose_file:
|
||
* @context_simple: A `GtkIMContextSimple`
|
||
* @compose_file: The path of compose file
|
||
*
|
||
* Adds an additional table from the X11 compose file.
|
||
*/
|
||
void
|
||
gtk_im_context_simple_add_compose_file (GtkIMContextSimple *context_simple,
|
||
const char *compose_file)
|
||
{
|
||
g_return_if_fail (GTK_IS_IM_CONTEXT_SIMPLE (context_simple));
|
||
|
||
add_compose_table_from_file (compose_file);
|
||
}
|