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gtk2/modules/input/gtkimcontextime.c
Chun-wei Fan c073a062b6 gtkimcontextime.c: Fix preedit window placement on HiDPI 
We must also take the scaling factor into account for placing the IME
preedit window that is often used for Chinese and Japanese input on
Windows.
2019-04-25 12:15:43 +08:00

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/*
* gtkimcontextime.c
* Copyright (C) 2003 Takuro Ashie
* Copyright (C) 2003-2004 Kazuki IWAMOTO
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
* Please see the following site for the detail of Windows IME API.
* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/appendix/hh/appendix/imeimes2_35ph.asp
*/
#ifdef GTK_DISABLE_DEPRECATED
#undef GTK_DISABLE_DEPRECATED
#endif
#include "gtkimcontextime.h"
#include "imm-extra.h"
#include "gdk/gdkkeysyms-compat.h"
#include "gdk/win32/gdkwin32.h"
#include "gdk/gdkkeysyms.h"
#include <pango/pango.h>
/* avoid warning */
#ifdef STRICT
# undef STRICT
# include <pango/pangowin32.h>
# ifndef STRICT
# define STRICT 1
# endif
#else /* STRICT */
# include <pango/pangowin32.h>
#endif /* STRICT */
/* #define BUFSIZE 4096 */
#define IS_DEAD_KEY(k) \
((k) >= GDK_dead_grave && (k) <= (GDK_dead_dasia+1))
#define FREE_PREEDIT_BUFFER(ctx) \
{ \
g_free((ctx)->priv->comp_str); \
g_free((ctx)->priv->read_str); \
(ctx)->priv->comp_str = NULL; \
(ctx)->priv->read_str = NULL; \
(ctx)->priv->comp_str_len = 0; \
(ctx)->priv->read_str_len = 0; \
}
struct _GtkIMContextIMEPrivate
{
/* save IME context when the client window is focused out */
DWORD conversion_mode;
DWORD sentence_mode;
LPVOID comp_str;
DWORD comp_str_len;
LPVOID read_str;
DWORD read_str_len;
guint32 dead_key_keyval;
};
/* GObject class methods */
static void gtk_im_context_ime_class_init (GtkIMContextIMEClass *class);
static void gtk_im_context_ime_init (GtkIMContextIME *context_ime);
static void gtk_im_context_ime_dispose (GObject *obj);
static void gtk_im_context_ime_finalize (GObject *obj);
static void gtk_im_context_ime_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_im_context_ime_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
/* GtkIMContext's virtual functions */
static void gtk_im_context_ime_set_client_window (GtkIMContext *context,
GdkWindow *client_window);
static gboolean gtk_im_context_ime_filter_keypress (GtkIMContext *context,
GdkEventKey *event);
static void gtk_im_context_ime_reset (GtkIMContext *context);
static void gtk_im_context_ime_get_preedit_string (GtkIMContext *context,
gchar **str,
PangoAttrList **attrs,
gint *cursor_pos);
static void gtk_im_context_ime_focus_in (GtkIMContext *context);
static void gtk_im_context_ime_focus_out (GtkIMContext *context);
static void gtk_im_context_ime_set_cursor_location (GtkIMContext *context,
GdkRectangle *area);
static void gtk_im_context_ime_set_use_preedit (GtkIMContext *context,
gboolean use_preedit);
/* GtkIMContextIME's private functions */
static void gtk_im_context_ime_set_preedit_font (GtkIMContext *context);
static GdkFilterReturn
gtk_im_context_ime_message_filter (GdkXEvent *xevent,
GdkEvent *event,
gpointer data);
static void get_window_position (GdkWindow *win,
gint *x,
gint *y);
static void cb_client_widget_hierarchy_changed (GtkWidget *widget,
GtkWidget *widget2,
GtkIMContextIME *context_ime);
GType gtk_type_im_context_ime = 0;
static GObjectClass *parent_class;
void
gtk_im_context_ime_register_type (GTypeModule *type_module)
{
const GTypeInfo im_context_ime_info = {
sizeof (GtkIMContextIMEClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gtk_im_context_ime_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkIMContextIME),
0,
(GInstanceInitFunc) gtk_im_context_ime_init,
};
gtk_type_im_context_ime =
g_type_module_register_type (type_module,
GTK_TYPE_IM_CONTEXT,
"GtkIMContextIME", &im_context_ime_info, 0);
}
static void
gtk_im_context_ime_class_init (GtkIMContextIMEClass *class)
{
GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (class);
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
parent_class = g_type_class_peek_parent (class);
gobject_class->finalize = gtk_im_context_ime_finalize;
gobject_class->dispose = gtk_im_context_ime_dispose;
gobject_class->set_property = gtk_im_context_ime_set_property;
gobject_class->get_property = gtk_im_context_ime_get_property;
im_context_class->set_client_window = gtk_im_context_ime_set_client_window;
im_context_class->filter_keypress = gtk_im_context_ime_filter_keypress;
im_context_class->reset = gtk_im_context_ime_reset;
im_context_class->get_preedit_string = gtk_im_context_ime_get_preedit_string;
im_context_class->focus_in = gtk_im_context_ime_focus_in;
im_context_class->focus_out = gtk_im_context_ime_focus_out;
im_context_class->set_cursor_location = gtk_im_context_ime_set_cursor_location;
im_context_class->set_use_preedit = gtk_im_context_ime_set_use_preedit;
}
static void
gtk_im_context_ime_init (GtkIMContextIME *context_ime)
{
context_ime->client_window = NULL;
context_ime->toplevel = NULL;
context_ime->use_preedit = TRUE;
context_ime->preediting = FALSE;
context_ime->opened = FALSE;
context_ime->focus = FALSE;
context_ime->cursor_location.x = 0;
context_ime->cursor_location.y = 0;
context_ime->cursor_location.width = 0;
context_ime->cursor_location.height = 0;
context_ime->commit_string = NULL;
context_ime->priv = g_malloc0 (sizeof (GtkIMContextIMEPrivate));
context_ime->priv->conversion_mode = 0;
context_ime->priv->sentence_mode = 0;
context_ime->priv->comp_str = NULL;
context_ime->priv->comp_str_len = 0;
context_ime->priv->read_str = NULL;
context_ime->priv->read_str_len = 0;
}
static void
gtk_im_context_ime_dispose (GObject *obj)
{
GtkIMContext *context = GTK_IM_CONTEXT (obj);
GtkIMContextIME *context_ime = GTK_IM_CONTEXT_IME (obj);
if (context_ime->client_window)
gtk_im_context_ime_set_client_window (context, NULL);
FREE_PREEDIT_BUFFER (context_ime);
if (G_OBJECT_CLASS (parent_class)->dispose)
G_OBJECT_CLASS (parent_class)->dispose (obj);
}
static void
gtk_im_context_ime_finalize (GObject *obj)
{
/* GtkIMContext *context = GTK_IM_CONTEXT (obj); */
GtkIMContextIME *context_ime = GTK_IM_CONTEXT_IME (obj);
g_free (context_ime->priv);
context_ime->priv = NULL;
if (G_OBJECT_CLASS (parent_class)->finalize)
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static void
gtk_im_context_ime_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkIMContextIME *context_ime = GTK_IM_CONTEXT_IME (object);
g_return_if_fail (GTK_IS_IM_CONTEXT_IME (context_ime));
switch (prop_id)
{
default:
break;
}
}
static void
gtk_im_context_ime_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkIMContextIME *context_ime = GTK_IM_CONTEXT_IME (object);
g_return_if_fail (GTK_IS_IM_CONTEXT_IME (context_ime));
switch (prop_id)
{
default:
break;
}
}
GtkIMContext *
gtk_im_context_ime_new (void)
{
return g_object_new (GTK_TYPE_IM_CONTEXT_IME, NULL);
}
static void
gtk_im_context_ime_set_client_window (GtkIMContext *context,
GdkWindow *client_window)
{
GtkIMContextIME *context_ime;
g_return_if_fail (GTK_IS_IM_CONTEXT_IME (context));
context_ime = GTK_IM_CONTEXT_IME (context);
if (client_window)
{
HIMC himc;
HWND hwnd;
hwnd = gdk_win32_window_get_impl_hwnd (client_window);
himc = ImmGetContext (hwnd);
if (himc)
{
context_ime->opened = ImmGetOpenStatus (himc);
ImmGetConversionStatus (himc,
&context_ime->priv->conversion_mode,
&context_ime->priv->sentence_mode);
ImmReleaseContext (hwnd, himc);
}
}
else if (context_ime->focus)
{
gtk_im_context_ime_focus_out (context);
}
context_ime->client_window = client_window;
}
static gunichar
_gtk_im_context_ime_dead_key_unichar (guint keyval,
gboolean spacing)
{
switch (keyval)
{
#define CASE(keysym, unicode, spacing_unicode) \
case GDK_dead_##keysym: return (spacing) ? spacing_unicode : unicode;
CASE (grave, 0x0300, 0x0060);
CASE (acute, 0x0301, 0x00b4);
CASE (circumflex, 0x0302, 0x005e);
CASE (tilde, 0x0303, 0x007e); /* Also used with perispomeni, 0x342. */
CASE (macron, 0x0304, 0x00af);
CASE (breve, 0x0306, 0x02d8);
CASE (abovedot, 0x0307, 0x02d9);
CASE (diaeresis, 0x0308, 0x00a8);
CASE (hook, 0x0309, 0);
CASE (abovering, 0x030A, 0x02da);
CASE (doubleacute, 0x030B, 0x2dd);
CASE (caron, 0x030C, 0x02c7);
CASE (abovecomma, 0x0313, 0); /* Equivalent to psili */
CASE (abovereversedcomma, 0x0314, 0); /* Equivalent to dasia */
CASE (horn, 0x031B, 0); /* Legacy use for psili, 0x313 (or 0x343). */
CASE (belowdot, 0x0323, 0);
CASE (cedilla, 0x0327, 0x00b8);
CASE (ogonek, 0x0328, 0); /* Legacy use for dasia, 0x314.*/
CASE (iota, 0x0345, 0);
#undef CASE
default:
return 0;
}
}
static void
_gtk_im_context_ime_commit_unichar (GtkIMContextIME *context_ime,
gunichar c)
{
gchar utf8[10];
int len;
if (context_ime->priv->dead_key_keyval != 0)
{
gunichar combining;
combining =
_gtk_im_context_ime_dead_key_unichar (context_ime->priv->dead_key_keyval,
FALSE);
g_unichar_compose (c, combining, &c);
}
len = g_unichar_to_utf8 (c, utf8);
utf8[len] = 0;
g_signal_emit_by_name (context_ime, "commit", utf8);
context_ime->priv->dead_key_keyval = 0;
}
static gboolean
gtk_im_context_ime_filter_keypress (GtkIMContext *context,
GdkEventKey *event)
{
GtkIMContextIME *context_ime;
gboolean retval = FALSE;
guint32 c;
g_return_val_if_fail (GTK_IS_IM_CONTEXT_IME (context), FALSE);
g_return_val_if_fail (event, FALSE);
if (event->type == GDK_KEY_RELEASE)
return FALSE;
if (event->state & GDK_CONTROL_MASK)
return FALSE;
context_ime = GTK_IM_CONTEXT_IME (context);
if (!context_ime->focus)
return FALSE;
if (!GDK_IS_WINDOW (context_ime->client_window))
return FALSE;
if (event->keyval == GDK_space &&
context_ime->priv->dead_key_keyval != 0)
{
c = _gtk_im_context_ime_dead_key_unichar (context_ime->priv->dead_key_keyval, TRUE);
context_ime->priv->dead_key_keyval = 0;
_gtk_im_context_ime_commit_unichar (context_ime, c);
return TRUE;
}
c = gdk_keyval_to_unicode (event->keyval);
if (c)
{
_gtk_im_context_ime_commit_unichar (context_ime, c);
retval = TRUE;
}
else if (IS_DEAD_KEY (event->keyval))
{
gunichar dead_key;
dead_key = _gtk_im_context_ime_dead_key_unichar (event->keyval, FALSE);
/* Emulate double input of dead keys */
if (dead_key && event->keyval == context_ime->priv->dead_key_keyval)
{
c = _gtk_im_context_ime_dead_key_unichar (context_ime->priv->dead_key_keyval, TRUE);
context_ime->priv->dead_key_keyval = 0;
_gtk_im_context_ime_commit_unichar (context_ime, c);
_gtk_im_context_ime_commit_unichar (context_ime, c);
}
else
context_ime->priv->dead_key_keyval = event->keyval;
}
return retval;
}
static void
gtk_im_context_ime_reset (GtkIMContext *context)
{
GtkIMContextIME *context_ime = GTK_IM_CONTEXT_IME (context);
HWND hwnd;
HIMC himc;
if (!context_ime->client_window)
return;
hwnd = gdk_win32_window_get_impl_hwnd (context_ime->client_window);
himc = ImmGetContext (hwnd);
if (!himc)
return;
if (context_ime->preediting)
{
if (ImmGetOpenStatus (himc))
ImmNotifyIME (himc, NI_COMPOSITIONSTR, CPS_CANCEL, 0);
context_ime->preediting = FALSE;
g_signal_emit_by_name (context, "preedit-changed");
}
ImmReleaseContext (hwnd, himc);
}
static gchar *
get_utf8_preedit_string (GtkIMContextIME *context_ime, gint *pos_ret)
{
gchar *utf8str = NULL;
HWND hwnd;
HIMC himc;
gint pos = 0;
if (pos_ret)
*pos_ret = 0;
if (!context_ime->client_window)
return g_strdup ("");
hwnd = gdk_win32_window_get_impl_hwnd (context_ime->client_window);
himc = ImmGetContext (hwnd);
if (!himc)
return g_strdup ("");
if (context_ime->preediting)
{
glong len;
len = ImmGetCompositionStringW (himc, GCS_COMPSTR, NULL, 0);
if (len > 0)
{
GError *error = NULL;
gpointer buf = g_alloca (len);
ImmGetCompositionStringW (himc, GCS_COMPSTR, buf, len);
len /= 2;
utf8str = g_utf16_to_utf8 (buf, len, NULL, NULL, &error);
if (error)
{
g_warning ("%s", error->message);
g_error_free (error);
}
if (pos_ret)
{
pos = ImmGetCompositionStringW (himc, GCS_CURSORPOS, NULL, 0);
if (pos < 0 || len < pos)
{
g_warning ("ImmGetCompositionString: "
"Invalid cursor position!");
pos = 0;
}
}
}
if (context_ime->commit_string)
{
if (utf8str)
{
gchar *utf8str_new = g_strdup (utf8str);
/* Note: We *don't* want to update context_ime->commit_string here!
* Otherwise it will be updated repeatedly, not what we want!
*/
g_free (utf8str);
utf8str = g_strconcat (context_ime->commit_string,
utf8str_new,
NULL);
g_free (utf8str_new);
pos += g_utf8_strlen (context_ime->commit_string, -1);
}
else
{
utf8str = g_strdup (context_ime->commit_string);
pos = g_utf8_strlen (context_ime->commit_string, -1);
}
}
}
if (!utf8str)
{
utf8str = g_strdup ("");
pos = 0;
}
if (pos_ret)
*pos_ret = pos;
ImmReleaseContext (hwnd, himc);
return utf8str;
}
static PangoAttrList *
get_pango_attr_list (GtkIMContextIME *context_ime, const gchar *utf8str)
{
PangoAttrList *attrs = pango_attr_list_new ();
HWND hwnd;
HIMC himc;
if (!context_ime->client_window)
return attrs;
hwnd = gdk_win32_window_get_impl_hwnd (context_ime->client_window);
himc = ImmGetContext (hwnd);
if (!himc)
return attrs;
if (context_ime->preediting)
{
const gchar *schr = utf8str, *echr;
guint8 *buf;
guint16 f_red, f_green, f_blue, b_red, b_green, b_blue;
glong len, spos = 0, epos, sidx = 0, eidx;
PangoAttribute *attr;
/*
* get attributes list of IME.
*/
len = ImmGetCompositionStringW (himc, GCS_COMPATTR, NULL, 0);
buf = g_alloca (len);
ImmGetCompositionStringW (himc, GCS_COMPATTR, buf, len);
/*
* schr and echr are pointer in utf8str.
*/
for (echr = g_utf8_next_char (utf8str); *schr != '\0';
echr = g_utf8_next_char (echr))
{
/*
* spos and epos are buf(attributes list of IME) position by
* bytes.
* Using the wide-char API, this value is same with UTF-8 offset.
*/
epos = g_utf8_pointer_to_offset (utf8str, echr);
/*
* sidx and eidx are positions in utf8str by bytes.
*/
eidx = echr - utf8str;
/*
* convert attributes list to PangoAttriute.
*/
if (*echr == '\0' || buf[spos] != buf[epos])
{
switch (buf[spos])
{
case ATTR_TARGET_CONVERTED:
attr = pango_attr_underline_new (PANGO_UNDERLINE_DOUBLE);
attr->start_index = sidx;
attr->end_index = eidx;
pango_attr_list_change (attrs, attr);
f_red = f_green = f_blue = 0;
b_red = b_green = b_blue = 0xffff;
break;
case ATTR_TARGET_NOTCONVERTED:
f_red = f_green = f_blue = 0xffff;
b_red = b_green = b_blue = 0;
break;
case ATTR_INPUT_ERROR:
f_red = f_green = f_blue = 0;
b_red = b_green = b_blue = 0x7fff;
break;
default: /* ATTR_INPUT,ATTR_CONVERTED,ATTR_FIXEDCONVERTED */
attr = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
attr->start_index = sidx;
attr->end_index = eidx;
pango_attr_list_change (attrs, attr);
f_red = f_green = f_blue = 0;
b_red = b_green = b_blue = 0xffff;
}
attr = pango_attr_foreground_new (f_red, f_green, f_blue);
attr->start_index = sidx;
attr->end_index = eidx;
pango_attr_list_change (attrs, attr);
attr = pango_attr_background_new (b_red, b_green, b_blue);
attr->start_index = sidx;
attr->end_index = eidx;
pango_attr_list_change (attrs, attr);
schr = echr;
spos = epos;
sidx = eidx;
}
}
}
ImmReleaseContext (hwnd, himc);
return attrs;
}
static void
gtk_im_context_ime_get_preedit_string (GtkIMContext *context,
gchar **str,
PangoAttrList **attrs,
gint *cursor_pos)
{
gchar *utf8str = NULL;
gint pos = 0;
GtkIMContextIME *context_ime;
context_ime = GTK_IM_CONTEXT_IME (context);
utf8str = get_utf8_preedit_string (context_ime, &pos);
if (attrs)
*attrs = get_pango_attr_list (context_ime, utf8str);
if (str)
{
*str = utf8str;
}
else
{
g_free (utf8str);
utf8str = NULL;
}
if (cursor_pos)
*cursor_pos = pos;
}
static void
gtk_im_context_ime_focus_in (GtkIMContext *context)
{
GtkIMContextIME *context_ime = GTK_IM_CONTEXT_IME (context);
GdkWindow *toplevel;
GtkWidget *widget = NULL;
HWND hwnd;
HIMC himc;
if (!GDK_IS_WINDOW (context_ime->client_window))
return;
/* swtich current context */
context_ime->focus = TRUE;
hwnd = gdk_win32_window_get_impl_hwnd (context_ime->client_window);
himc = ImmGetContext (hwnd);
if (!himc)
return;
toplevel = gdk_window_get_toplevel (context_ime->client_window);
if (GDK_IS_WINDOW (toplevel))
{
gdk_window_add_filter (toplevel,
gtk_im_context_ime_message_filter, context_ime);
context_ime->toplevel = toplevel;
}
else
{
g_warning ("gtk_im_context_ime_focus_in(): "
"cannot find toplevel window.");
return;
}
/* trace reparenting (probably no need) */
gdk_window_get_user_data (context_ime->client_window, (gpointer) & widget);
if (GTK_IS_WIDGET (widget))
{
g_signal_connect (widget, "hierarchy-changed",
G_CALLBACK (cb_client_widget_hierarchy_changed),
context_ime);
}
else
{
/* warning? */
}
/* restore preedit context */
ImmSetConversionStatus (himc,
context_ime->priv->conversion_mode,
context_ime->priv->sentence_mode);
if (context_ime->opened)
{
if (!ImmGetOpenStatus (himc))
ImmSetOpenStatus (himc, TRUE);
if (context_ime->preediting)
{
ImmSetCompositionStringW (himc,
SCS_SETSTR,
context_ime->priv->comp_str,
context_ime->priv->comp_str_len, NULL, 0);
FREE_PREEDIT_BUFFER (context_ime);
}
}
/* clean */
ImmReleaseContext (hwnd, himc);
}
static void
gtk_im_context_ime_focus_out (GtkIMContext *context)
{
GtkIMContextIME *context_ime = GTK_IM_CONTEXT_IME (context);
GdkWindow *toplevel;
GtkWidget *widget = NULL;
HWND hwnd;
HIMC himc;
if (!GDK_IS_WINDOW (context_ime->client_window))
return;
/* swtich current context */
context_ime->focus = FALSE;
hwnd = gdk_win32_window_get_impl_hwnd (context_ime->client_window);
himc = ImmGetContext (hwnd);
if (!himc)
return;
/* save preedit context */
ImmGetConversionStatus (himc,
&context_ime->priv->conversion_mode,
&context_ime->priv->sentence_mode);
if (ImmGetOpenStatus (himc))
{
gboolean preediting = context_ime->preediting;
if (preediting)
{
FREE_PREEDIT_BUFFER (context_ime);
context_ime->priv->comp_str_len
= ImmGetCompositionStringW (himc, GCS_COMPSTR, NULL, 0);
context_ime->priv->comp_str
= g_malloc (context_ime->priv->comp_str_len);
ImmGetCompositionStringW (himc, GCS_COMPSTR,
context_ime->priv->comp_str,
context_ime->priv->comp_str_len);
context_ime->priv->read_str_len
= ImmGetCompositionStringW (himc, GCS_COMPREADSTR, NULL, 0);
context_ime->priv->read_str
= g_malloc (context_ime->priv->read_str_len);
ImmGetCompositionStringW (himc, GCS_COMPREADSTR,
context_ime->priv->read_str,
context_ime->priv->read_str_len);
}
ImmSetOpenStatus (himc, FALSE);
context_ime->opened = TRUE;
context_ime->preediting = preediting;
}
else
{
context_ime->opened = FALSE;
context_ime->preediting = FALSE;
}
/* remove signal handler */
gdk_window_get_user_data (context_ime->client_window, (gpointer) & widget);
if (GTK_IS_WIDGET (widget))
{
g_signal_handlers_disconnect_by_func
(G_OBJECT (widget),
G_CALLBACK (cb_client_widget_hierarchy_changed), context_ime);
}
/* remove event fileter */
toplevel = gdk_window_get_toplevel (context_ime->client_window);
if (GDK_IS_WINDOW (toplevel))
{
gdk_window_remove_filter (toplevel,
gtk_im_context_ime_message_filter,
context_ime);
context_ime->toplevel = NULL;
}
else
{
g_warning ("gtk_im_context_ime_focus_out(): "
"cannot find toplevel window.");
}
/* clean */
ImmReleaseContext (hwnd, himc);
}
static void
gtk_im_context_ime_set_cursor_location (GtkIMContext *context,
GdkRectangle *area)
{
gint wx = 0, wy = 0;
GtkIMContextIME *context_ime;
COMPOSITIONFORM cf;
HWND hwnd;
HIMC himc;
guint scale;
g_return_if_fail (GTK_IS_IM_CONTEXT_IME (context));
context_ime = GTK_IM_CONTEXT_IME (context);
if (area)
context_ime->cursor_location = *area;
if (!context_ime->client_window)
return;
hwnd = gdk_win32_window_get_impl_hwnd (context_ime->client_window);
himc = ImmGetContext (hwnd);
if (!himc)
return;
scale = gdk_window_get_scale_factor (context_ime->client_window);
get_window_position (context_ime->client_window, &wx, &wy);
cf.dwStyle = CFS_POINT;
cf.ptCurrentPos.x = (wx + context_ime->cursor_location.x) * scale;
cf.ptCurrentPos.y = (wy + context_ime->cursor_location.y) * scale;
ImmSetCompositionWindow (himc, &cf);
ImmReleaseContext (hwnd, himc);
}
static void
gtk_im_context_ime_set_use_preedit (GtkIMContext *context,
gboolean use_preedit)
{
GtkIMContextIME *context_ime;
g_return_if_fail (GTK_IS_IM_CONTEXT_IME (context));
context_ime = GTK_IM_CONTEXT_IME (context);
context_ime->use_preedit = use_preedit;
if (context_ime->preediting)
{
HWND hwnd;
HIMC himc;
hwnd = gdk_win32_window_get_impl_hwnd (context_ime->client_window);
himc = ImmGetContext (hwnd);
if (!himc)
return;
/* FIXME: What to do? */
ImmReleaseContext (hwnd, himc);
}
}
static void
gtk_im_context_ime_set_preedit_font (GtkIMContext *context)
{
GtkIMContextIME *context_ime;
GtkWidget *widget = NULL;
HWND hwnd;
HIMC himc;
HKL ime = GetKeyboardLayout (0);
const gchar *lang;
gunichar wc;
PangoContext *pango_context;
PangoFont *font;
LOGFONT *logfont;
GtkStyleContext *style;
PangoFontDescription *font_desc;
g_return_if_fail (GTK_IS_IM_CONTEXT_IME (context));
context_ime = GTK_IM_CONTEXT_IME (context);
if (!context_ime->client_window)
return;
gdk_window_get_user_data (context_ime->client_window, (gpointer) &widget);
if (!GTK_IS_WIDGET (widget))
return;
hwnd = gdk_win32_window_get_impl_hwnd (context_ime->client_window);
himc = ImmGetContext (hwnd);
if (!himc)
return;
/* set font */
pango_context = gtk_widget_get_pango_context (widget);
if (!pango_context)
goto ERROR_OUT;
/* Try to make sure we use a font that actually can show the
* language in question.
*/
switch (PRIMARYLANGID (LOWORD (ime)))
{
case LANG_JAPANESE:
lang = "ja"; break;
case LANG_KOREAN:
lang = "ko"; break;
case LANG_CHINESE:
switch (SUBLANGID (LOWORD (ime)))
{
case SUBLANG_CHINESE_TRADITIONAL:
lang = "zh_TW"; break;
case SUBLANG_CHINESE_SIMPLIFIED:
lang = "zh_CN"; break;
case SUBLANG_CHINESE_HONGKONG:
lang = "zh_HK"; break;
case SUBLANG_CHINESE_SINGAPORE:
lang = "zh_SG"; break;
case SUBLANG_CHINESE_MACAU:
lang = "zh_MO"; break;
default:
lang = "zh"; break;
}
break;
default:
lang = ""; break;
}
style = gtk_widget_get_style_context (widget);
gtk_style_context_save (style);
gtk_style_context_set_state (style, GTK_STATE_FLAG_NORMAL);
gtk_style_context_get (style,
gtk_style_context_get_state (style),
"font",
&font_desc,
NULL);
gtk_style_context_restore (style);
if (lang[0])
{
/* We know what language it is. Look for a character, any
* character, that language needs.
*/
PangoLanguage *pango_lang = pango_language_from_string (lang);
PangoFontset *fontset =
pango_context_load_fontset (pango_context,
font_desc,
pango_lang);
gunichar *sample =
g_utf8_to_ucs4 (pango_language_get_sample_string (pango_lang),
-1, NULL, NULL, NULL);
wc = 0x4E00; /* In all CJK languages? */
if (sample != NULL)
{
int i;
for (i = 0; sample[i]; i++)
if (g_unichar_iswide (sample[i]))
{
wc = sample[i];
break;
}
g_free (sample);
}
font = pango_fontset_get_font (fontset, wc);
g_object_unref (fontset);
}
else
font = pango_context_load_font (pango_context, font_desc);
if (!font)
goto ERROR_OUT;
logfont = pango_win32_font_logfont (font);
if (logfont)
ImmSetCompositionFont (himc, logfont);
g_object_unref (font);
ERROR_OUT:
/* clean */
ImmReleaseContext (hwnd, himc);
}
static GdkFilterReturn
gtk_im_context_ime_message_filter (GdkXEvent *xevent,
GdkEvent *event,
gpointer data)
{
GtkIMContext *context;
GtkIMContextIME *context_ime;
HWND hwnd;
HIMC himc;
MSG *msg = (MSG *) xevent;
GdkFilterReturn retval = GDK_FILTER_CONTINUE;
g_return_val_if_fail (GTK_IS_IM_CONTEXT_IME (data), retval);
context = GTK_IM_CONTEXT (data);
context_ime = GTK_IM_CONTEXT_IME (data);
if (!context_ime->focus)
return retval;
hwnd = gdk_win32_window_get_impl_hwnd (context_ime->client_window);
himc = ImmGetContext (hwnd);
if (!himc)
return retval;
switch (msg->message)
{
case WM_IME_COMPOSITION:
{
gint wx = 0, wy = 0;
CANDIDATEFORM cf;
guint scale = gdk_window_get_scale_factor (context_ime->client_window);
get_window_position (context_ime->client_window, &wx, &wy);
/* FIXME! */
{
HWND hwnd_top;
POINT pt;
RECT rc;
hwnd_top =
gdk_win32_window_get_impl_hwnd (gdk_window_get_toplevel
(context_ime->client_window));
GetWindowRect (hwnd_top, &rc);
pt.x = wx * scale;
pt.y = wy * scale;
ClientToScreen (hwnd_top, &pt);
wx = (pt.x - rc.left) / scale;
wy = (pt.y - rc.top) / scale;
}
cf.dwIndex = 0;
cf.dwStyle = CFS_CANDIDATEPOS;
cf.ptCurrentPos.x = (wx + context_ime->cursor_location.x) * scale;
cf.ptCurrentPos.y = (wy + context_ime->cursor_location.y
+ context_ime->cursor_location.height) * scale;
ImmSetCandidateWindow (himc, &cf);
if ((msg->lParam & GCS_COMPSTR))
g_signal_emit_by_name (context, "preedit-changed");
if (msg->lParam & GCS_RESULTSTR)
{
gsize len;
gchar *utf8str = NULL;
GError *error = NULL;
len = ImmGetCompositionStringW (himc, GCS_RESULTSTR, NULL, 0);
if (len > 0)
{
gpointer buf = g_alloca (len);
ImmGetCompositionStringW (himc, GCS_RESULTSTR, buf, len);
len /= 2;
context_ime->commit_string = g_utf16_to_utf8 (buf, len, NULL, NULL, &error);
if (error)
{
g_warning ("%s", error->message);
g_error_free (error);
}
if (context_ime->commit_string)
{
g_signal_emit_by_name (context, "commit", context_ime->commit_string);
g_free (context_ime->commit_string);
context_ime->commit_string = NULL;
retval = TRUE;
}
}
}
if (context_ime->use_preedit)
retval = TRUE;
break;
}
case WM_IME_STARTCOMPOSITION:
context_ime->preediting = TRUE;
gtk_im_context_ime_set_cursor_location (context, NULL);
g_signal_emit_by_name (context, "preedit-start");
if (context_ime->use_preedit)
retval = TRUE;
break;
case WM_IME_ENDCOMPOSITION:
context_ime->preediting = FALSE;
g_signal_emit_by_name (context, "preedit-changed");
g_signal_emit_by_name (context, "preedit-end");
if (context_ime->use_preedit)
retval = TRUE;
break;
case WM_IME_NOTIFY:
switch (msg->wParam)
{
case IMN_SETOPENSTATUS:
context_ime->opened = ImmGetOpenStatus (himc);
gtk_im_context_ime_set_preedit_font (context);
break;
default:
break;
}
default:
break;
}
ImmReleaseContext (hwnd, himc);
return retval;
}
/*
* x and y must be initialized to 0.
*/
static void
get_window_position (GdkWindow *win, gint *x, gint *y)
{
GdkWindow *parent, *toplevel;
gint wx, wy;
g_return_if_fail (GDK_IS_WINDOW (win));
g_return_if_fail (x && y);
gdk_window_get_position (win, &wx, &wy);
*x += wx;
*y += wy;
parent = gdk_window_get_parent (win);
toplevel = gdk_window_get_toplevel (win);
if (parent && parent != toplevel)
get_window_position (parent, x, y);
}
/*
* probably, this handler isn't needed.
*/
static void
cb_client_widget_hierarchy_changed (GtkWidget *widget,
GtkWidget *widget2,
GtkIMContextIME *context_ime)
{
GdkWindow *new_toplevel;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (GTK_IS_IM_CONTEXT_IME (context_ime));
if (!context_ime->client_window)
return;
if (!context_ime->focus)
return;
new_toplevel = gdk_window_get_toplevel (context_ime->client_window);
if (context_ime->toplevel == new_toplevel)
return;
/* remove filter from old toplevel */
if (GDK_IS_WINDOW (context_ime->toplevel))
{
gdk_window_remove_filter (context_ime->toplevel,
gtk_im_context_ime_message_filter,
context_ime);
}
else
{
}
/* add filter to new toplevel */
if (GDK_IS_WINDOW (new_toplevel))
{
gdk_window_add_filter (new_toplevel,
gtk_im_context_ime_message_filter, context_ime);
}
else
{
}
context_ime->toplevel = new_toplevel;
}
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