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gtk2/gtk/gtkimcontextwayland.c
Carlos Garnacho f66ffde68d gtkimcontextwayland: Refactor handling of client updates 
Currently, the wayland IM context sends zwp_text_input_v3.commit from
a number of places, and some of them with partial data. In order to
make client state updates "atomic" and complete, make the communication
happen over an unified notify_im_change() function that happens on
a narrower set of circumstances:

  - The GtkIMContext is reset
  - The GtkIMContext is just focused
  - The gesture to invoke the OSK is triggered
  - The IM context is reacting to changes coming from the compositor

Notably, setting the cursor location or the surrounding text do not try
to commit state on their own, and now will be flushed with the corresponding
IM update or reset. But also, these requests won't be prevented from
happening individually on serial mismatch, instead it will be the whole
state commit which is held off.

With these changes in place, all client-side updates are notified
atomically to the compositor under a single .commit request.

Fixes: https://gitlab.gnome.org/GNOME/gtk/-/issues/5106
Fixes: https://gitlab.gnome.org/GNOME/gtk/-/issues/5105
2022-08-18 19:19:53 +02:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2017 Red Hat, Inc.
* Copyright (C) 2018 Purism SPC
*
* 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/>.
*/
#include "config.h"
#include <string.h>
#include <wayland-client-protocol.h>
#include "gtk/gtkdragsourceprivate.h"
#include "gtk/gtkimcontextwayland.h"
#include "gtk/gtkintl.h"
#include "gtk/gtkimmoduleprivate.h"
#include "gdk/wayland/gdkwayland.h"
#include "text-input-unstable-v3-client-protocol.h"
typedef struct _GtkIMContextWaylandGlobal GtkIMContextWaylandGlobal;
typedef struct _GtkIMContextWayland GtkIMContextWayland;
typedef struct _GtkIMContextWaylandClass GtkIMContextWaylandClass;
struct _GtkIMContextWaylandGlobal
{
struct wl_display *display;
struct wl_registry *registry;
uint32_t text_input_manager_wl_id;
struct zwp_text_input_manager_v3 *text_input_manager;
struct zwp_text_input_v3 *text_input;
GtkIMContext *current;
/* The input-method.enter event may happen before or after GTK focus-in,
* so the context may not exist at the time. Same for leave and focus-out. */
gboolean focused;
guint serial;
guint done_serial;
};
struct _GtkIMContextWaylandClass
{
GtkIMContextSimpleClass parent_class;
};
struct preedit {
char *text;
int cursor_begin;
int cursor_end;
};
struct surrounding_delete {
guint before_length;
guint after_length;
};
struct _GtkIMContextWayland
{
GtkIMContextSimple parent_instance;
GtkWidget *widget;
GtkWidget *controller_widget;
GtkGesture *gesture;
double press_x;
double press_y;
struct {
char *text;
int cursor_idx;
int anchor_idx;
} surrounding;
enum zwp_text_input_v3_change_cause surrounding_change;
struct surrounding_delete pending_surrounding_delete;
struct preedit current_preedit;
struct preedit pending_preedit;
char *pending_commit;
cairo_rectangle_int_t cursor_rect;
guint use_preedit : 1;
};
static void gtk_im_context_wayland_focus_out (GtkIMContext *context);
static void commit_state (GtkIMContextWayland *context);
static void notify_surrounding_text (GtkIMContextWayland *context);
static void notify_cursor_location (GtkIMContextWayland *context);
static void notify_content_type (GtkIMContextWayland *context);
G_DEFINE_TYPE_WITH_CODE (GtkIMContextWayland, gtk_im_context_wayland, GTK_TYPE_IM_CONTEXT_SIMPLE,
gtk_im_module_ensure_extension_point ();
g_io_extension_point_implement (GTK_IM_MODULE_EXTENSION_POINT_NAME,
g_define_type_id,
"wayland",
100));
#define GTK_IM_CONTEXT_WAYLAND(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), gtk_im_context_wayland_get_type (), GtkIMContextWayland))
static GtkIMContextWaylandGlobal *
gtk_im_context_wayland_global_get (GdkDisplay *display);
static GtkIMContextWaylandGlobal *
gtk_im_context_wayland_get_global (GtkIMContextWayland *self)
{
GtkIMContextWaylandGlobal *global;
if (self->widget == NULL)
return NULL;
global = gtk_im_context_wayland_global_get (gtk_widget_get_display (self->widget));
if (global->current != GTK_IM_CONTEXT (self))
return NULL;
if (global->text_input == NULL)
return NULL;
return global;
}
static void
notify_im_change (GtkIMContextWayland *context,
enum zwp_text_input_v3_change_cause cause)
{
GtkIMContextWaylandGlobal *global;
gboolean result;
global = gtk_im_context_wayland_get_global (context);
if (global == NULL)
return;
context->surrounding_change = cause;
g_signal_emit_by_name (global->current, "retrieve-surrounding", &result);
notify_surrounding_text (context);
notify_content_type (context);
notify_cursor_location (context);
commit_state (context);
}
static void
text_input_preedit (void *data,
struct zwp_text_input_v3 *text_input,
const char *text,
int cursor_begin,
int cursor_end)
{
GtkIMContextWayland *context;
GtkIMContextWaylandGlobal *global = data;
if (!global->current)
return;
context = GTK_IM_CONTEXT_WAYLAND (global->current);
g_free (context->pending_preedit.text);
context->pending_preedit.text = g_strdup (text);
context->pending_preedit.cursor_begin = cursor_begin;
context->pending_preedit.cursor_end = cursor_end;
}
static void
text_input_preedit_apply (GtkIMContextWaylandGlobal *global)
{
GtkIMContextWayland *context;
gboolean state_change;
struct preedit defaults = {0};
if (!global->current)
return;
context = GTK_IM_CONTEXT_WAYLAND (global->current);
if (context->pending_preedit.text == NULL &&
context->current_preedit.text == NULL)
return;
state_change = ((context->pending_preedit.text == NULL)
!= (context->current_preedit.text == NULL));
if (state_change && !context->current_preedit.text)
g_signal_emit_by_name (context, "preedit-start");
g_free (context->current_preedit.text);
context->current_preedit = context->pending_preedit;
context->pending_preedit = defaults;
g_signal_emit_by_name (context, "preedit-changed");
if (state_change && !context->current_preedit.text)
g_signal_emit_by_name (context, "preedit-end");
}
static void
text_input_commit (void *data,
struct zwp_text_input_v3 *text_input,
const char *text)
{
GtkIMContextWaylandGlobal *global = data;
GtkIMContextWayland *context;
if (!global->current)
return;
context = GTK_IM_CONTEXT_WAYLAND (global->current);
g_free (context->pending_commit);
context->pending_commit = g_strdup (text);
}
static void
text_input_commit_apply (GtkIMContextWaylandGlobal *global)
{
GtkIMContextWayland *context;
context = GTK_IM_CONTEXT_WAYLAND (global->current);
if (context->pending_commit)
g_signal_emit_by_name (global->current, "commit", context->pending_commit);
g_free (context->pending_commit);
context->pending_commit = NULL;
}
static void
text_input_delete_surrounding_text (void *data,
struct zwp_text_input_v3 *text_input,
uint32_t before_length,
uint32_t after_length)
{
GtkIMContextWaylandGlobal *global = data;
GtkIMContextWayland *context;
if (!global->current)
return;
context = GTK_IM_CONTEXT_WAYLAND (global->current);
context->pending_surrounding_delete.before_length = before_length;
context->pending_surrounding_delete.after_length = after_length;
}
static void
text_input_delete_surrounding_text_apply (GtkIMContextWaylandGlobal *global)
{
GtkIMContextWayland *context;
gboolean retval;
int len;
struct surrounding_delete defaults = {0};
context = GTK_IM_CONTEXT_WAYLAND (global->current);
len = context->pending_surrounding_delete.after_length
+ context->pending_surrounding_delete.before_length;
if (len > 0)
g_signal_emit_by_name (global->current, "delete-surrounding",
-context->pending_surrounding_delete.before_length,
len, &retval);
context->pending_surrounding_delete = defaults;
}
static void
text_input_done (void *data,
struct zwp_text_input_v3 *text_input,
uint32_t serial)
{
GtkIMContextWaylandGlobal *global = data;
GtkIMContextWayland *context;
gboolean update_im;
global->done_serial = serial;
if (!global->current)
return;
context = GTK_IM_CONTEXT_WAYLAND (global->current);
update_im = (context->pending_commit != NULL ||
g_strcmp0 (context->pending_preedit.text,
context->current_preedit.text) != 0);
text_input_delete_surrounding_text_apply (global);
text_input_commit_apply (global);
text_input_preedit_apply (global);
if (update_im && global->serial == serial)
notify_im_change (context, ZWP_TEXT_INPUT_V3_CHANGE_CAUSE_INPUT_METHOD);
}
static void
notify_surrounding_text (GtkIMContextWayland *context)
{
#define MAX_LEN 4000
GtkIMContextWaylandGlobal *global;
const char *start, *end;
int len, cursor, anchor;
char *str = NULL;
if (!context->surrounding.text)
return;
global = gtk_im_context_wayland_get_global (context);
if (global == NULL)
return;
len = strlen (context->surrounding.text);
cursor = context->surrounding.cursor_idx;
anchor = context->surrounding.anchor_idx;
/* The protocol specifies a maximum length of 4KiB on transfers,
* mangle the surrounding text if it's bigger than that, and relocate
* cursor/anchor locations as per the string being sent.
*/
if (len > MAX_LEN)
{
if (context->surrounding.cursor_idx < MAX_LEN &&
context->surrounding.anchor_idx < MAX_LEN)
{
start = context->surrounding.text;
end = &context->surrounding.text[MAX_LEN];
}
else if (context->surrounding.cursor_idx > len - MAX_LEN &&
context->surrounding.anchor_idx > len - MAX_LEN)
{
start = &context->surrounding.text[len - MAX_LEN];
end = &context->surrounding.text[len];
}
else
{
int mid, a, b;
int cursor_len = ABS (context->surrounding.cursor_idx -
context->surrounding.anchor_idx);
if (cursor_len > MAX_LEN)
{
g_warn_if_reached ();
return;
}
mid = MIN (context->surrounding.cursor_idx,
context->surrounding.anchor_idx) + (cursor_len / 2);
a = MAX (0, mid - (MAX_LEN / 2));
b = MIN (len, mid + (MAX_LEN / 2));
start = &context->surrounding.text[a];
end = &context->surrounding.text[b];
}
if (start != context->surrounding.text)
start = g_utf8_next_char (start);
if (end != &context->surrounding.text[len])
end = g_utf8_find_prev_char (context->surrounding.text, end);
cursor -= start - context->surrounding.text;
anchor -= start - context->surrounding.text;
str = g_strndup (start, end - start);
}
zwp_text_input_v3_set_surrounding_text (global->text_input,
str ? str : context->surrounding.text,
cursor, anchor);
zwp_text_input_v3_set_text_change_cause (global->text_input,
context->surrounding_change);
g_free (str);
#undef MAX_LEN
}
static void
notify_cursor_location (GtkIMContextWayland *context)
{
GtkIMContextWaylandGlobal *global;
cairo_rectangle_int_t rect;
double x, y, sx, sy;
global = gtk_im_context_wayland_get_global (context);
if (global == NULL)
return;
rect = context->cursor_rect;
gtk_widget_translate_coordinates (context->widget,
GTK_WIDGET (gtk_widget_get_root (context->widget)),
rect.x, rect.y,
&x, &y);
gtk_native_get_surface_transform (gtk_widget_get_native (context->widget),
&sx, &sy);
rect.x = x + sx;
rect.y = y + sy;
zwp_text_input_v3_set_cursor_rectangle (global->text_input,
rect.x, rect.y,
rect.width, rect.height);
}
static uint32_t
translate_hints (GtkInputHints input_hints,
GtkInputPurpose purpose)
{
uint32_t hints = 0;
if (input_hints & GTK_INPUT_HINT_SPELLCHECK)
hints |= ZWP_TEXT_INPUT_V3_CONTENT_HINT_SPELLCHECK;
if (input_hints & GTK_INPUT_HINT_WORD_COMPLETION)
hints |= ZWP_TEXT_INPUT_V3_CONTENT_HINT_COMPLETION;
if (input_hints & GTK_INPUT_HINT_LOWERCASE)
hints |= ZWP_TEXT_INPUT_V3_CONTENT_HINT_LOWERCASE;
if (input_hints & GTK_INPUT_HINT_UPPERCASE_CHARS)
hints |= ZWP_TEXT_INPUT_V3_CONTENT_HINT_UPPERCASE;
if (input_hints & GTK_INPUT_HINT_UPPERCASE_WORDS)
hints |= ZWP_TEXT_INPUT_V3_CONTENT_HINT_TITLECASE;
if (input_hints & GTK_INPUT_HINT_UPPERCASE_SENTENCES)
hints |= ZWP_TEXT_INPUT_V3_CONTENT_HINT_AUTO_CAPITALIZATION;
if (purpose == GTK_INPUT_PURPOSE_PIN ||
purpose == GTK_INPUT_PURPOSE_PASSWORD)
{
hints |= (ZWP_TEXT_INPUT_V3_CONTENT_HINT_HIDDEN_TEXT |
ZWP_TEXT_INPUT_V3_CONTENT_HINT_SENSITIVE_DATA);
}
return hints;
}
static uint32_t
translate_purpose (GtkInputPurpose purpose)
{
switch (purpose)
{
case GTK_INPUT_PURPOSE_FREE_FORM:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_NORMAL;
case GTK_INPUT_PURPOSE_ALPHA:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_ALPHA;
case GTK_INPUT_PURPOSE_DIGITS:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_DIGITS;
case GTK_INPUT_PURPOSE_NUMBER:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_NUMBER;
case GTK_INPUT_PURPOSE_PHONE:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_PHONE;
case GTK_INPUT_PURPOSE_URL:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_URL;
case GTK_INPUT_PURPOSE_EMAIL:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_EMAIL;
case GTK_INPUT_PURPOSE_NAME:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_NAME;
case GTK_INPUT_PURPOSE_PASSWORD:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_PASSWORD;
case GTK_INPUT_PURPOSE_PIN:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_PIN;
case GTK_INPUT_PURPOSE_TERMINAL:
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_TERMINAL;
default:
g_assert_not_reached ();
}
return ZWP_TEXT_INPUT_V3_CONTENT_PURPOSE_NORMAL;
}
static void
notify_content_type (GtkIMContextWayland *context)
{
GtkIMContextWaylandGlobal *global;
GtkInputHints hints;
GtkInputPurpose purpose;
global = gtk_im_context_wayland_get_global (context);
if (global == NULL)
return;
g_object_get (context,
"input-hints", &hints,
"input-purpose", &purpose,
NULL);
zwp_text_input_v3_set_content_type (global->text_input,
translate_hints (hints, purpose),
translate_purpose (purpose));
}
static void
commit_state (GtkIMContextWayland *context)
{
GtkIMContextWaylandGlobal *global;
global = gtk_im_context_wayland_get_global (context);
if (global == NULL)
return;
global->serial++;
zwp_text_input_v3_commit (global->text_input);
context->surrounding_change = ZWP_TEXT_INPUT_V3_CHANGE_CAUSE_INPUT_METHOD;
}
static void
gtk_im_context_wayland_finalize (GObject *object)
{
GtkIMContextWayland *context = GTK_IM_CONTEXT_WAYLAND (object);
gtk_im_context_wayland_focus_out (GTK_IM_CONTEXT (context));
g_clear_object (&context->widget);
g_clear_object (&context->gesture);
g_free (context->surrounding.text);
g_free (context->current_preedit.text);
g_free (context->pending_preedit.text);
g_free (context->pending_commit);
G_OBJECT_CLASS (gtk_im_context_wayland_parent_class)->finalize (object);
}
static void
pressed_cb (GtkGestureClick *gesture,
int n_press,
double x,
double y,
GtkIMContextWayland *context)
{
if (n_press == 1)
{
context->press_x = x;
context->press_y = y;
}
}
static void
released_cb (GtkGestureClick *gesture,
int n_press,
double x,
double y,
GtkIMContextWayland *context)
{
GtkIMContextWaylandGlobal *global;
GtkInputHints hints;
global = gtk_im_context_wayland_get_global (context);
if (global == NULL)
return;
g_object_get (context, "input-hints", &hints, NULL);
if (global->focused &&
n_press == 1 &&
(hints & GTK_INPUT_HINT_INHIBIT_OSK) == 0 &&
!gtk_drag_check_threshold_double (context->widget,
context->press_x,
context->press_y,
x, y))
{
zwp_text_input_v3_enable (global->text_input);
notify_im_change (GTK_IM_CONTEXT_WAYLAND (context),
ZWP_TEXT_INPUT_V3_CHANGE_CAUSE_OTHER);
}
}
static void
gtk_im_context_wayland_set_client_widget (GtkIMContext *context,
GtkWidget *widget)
{
GtkIMContextWayland *context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
if (widget == context_wayland->widget)
return;
if (context_wayland->widget)
gtk_im_context_wayland_focus_out (context);
if (context_wayland->controller_widget)
{
gtk_widget_remove_controller (context_wayland->controller_widget,
GTK_EVENT_CONTROLLER (context_wayland->gesture));
context_wayland->gesture = NULL;
g_clear_object (&context_wayland->controller_widget);
}
g_set_object (&context_wayland->widget, widget);
if (widget)
{
GtkWidget *parent;
GtkGesture *gesture;
gesture = gtk_gesture_click_new ();
gtk_event_controller_set_name (GTK_EVENT_CONTROLLER (gesture), "wayland-im-context-click");
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (gesture),
GTK_PHASE_CAPTURE);
g_signal_connect (gesture, "pressed",
G_CALLBACK (pressed_cb), context);
g_signal_connect (gesture, "released",
G_CALLBACK (released_cb), context);
parent = gtk_widget_get_parent (widget);
if (parent &&
GTK_IS_EDITABLE (widget) &&
GTK_IS_EDITABLE (parent))
g_set_object (&context_wayland->controller_widget, parent);
else
g_set_object (&context_wayland->controller_widget, widget);
gtk_widget_add_controller (context_wayland->controller_widget,
GTK_EVENT_CONTROLLER (gesture));
context_wayland->gesture = gesture;
}
}
static void
gtk_im_context_wayland_get_preedit_string (GtkIMContext *context,
char **str,
PangoAttrList **attrs,
int *cursor_pos)
{
GtkIMContextWayland *context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
const char *preedit_str;
if (attrs)
*attrs = NULL;
GTK_IM_CONTEXT_CLASS (gtk_im_context_wayland_parent_class)->get_preedit_string (context,
str, attrs,
cursor_pos);
/* If the parent implementation returns a len>0 string, go with it */
if (str && *str)
{
if (**str)
return;
g_free (*str);
}
preedit_str =
context_wayland->current_preedit.text ? context_wayland->current_preedit.text : "";
if (cursor_pos)
*cursor_pos = g_utf8_strlen (preedit_str,
context_wayland->current_preedit.cursor_begin);
if (str)
*str = g_strdup (preedit_str);
if (attrs)
{
PangoAttribute *attr;
guint len = strlen (preedit_str);
if (!*attrs)
*attrs = pango_attr_list_new ();
attr = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
attr->start_index = 0;
attr->end_index = len;
pango_attr_list_insert (*attrs, attr);
/* enable fallback, since IBus will send us things like ⎄ */
attr = pango_attr_fallback_new (TRUE);
attr->start_index = 0;
attr->end_index = len;
pango_attr_list_insert (*attrs, attr);
if (context_wayland->current_preedit.cursor_begin
!= context_wayland->current_preedit.cursor_end)
{
/* FIXME: Oh noes, how to highlight while taking into account user preferences? */
PangoAttribute *cursor = pango_attr_weight_new (PANGO_WEIGHT_BOLD);
cursor->start_index = context_wayland->current_preedit.cursor_begin;
cursor->end_index = context_wayland->current_preedit.cursor_end;
pango_attr_list_insert (*attrs, cursor);
}
}
}
static gboolean
gtk_im_context_wayland_filter_keypress (GtkIMContext *context,
GdkEvent *key)
{
/* This is done by the compositor */
return GTK_IM_CONTEXT_CLASS (gtk_im_context_wayland_parent_class)->filter_keypress (context, key);
}
static void
enable (GtkIMContextWayland *context_wayland,
GtkIMContextWaylandGlobal *global)
{
zwp_text_input_v3_enable (global->text_input);
notify_im_change (context_wayland,
ZWP_TEXT_INPUT_V3_CHANGE_CAUSE_OTHER);
}
static void
disable (GtkIMContextWayland *context_wayland,
GtkIMContextWaylandGlobal *global)
{
zwp_text_input_v3_disable (global->text_input);
commit_state (context_wayland);
/* The commit above will still count in the .done event accounting,
* we should account for it, lest the serial gets out of sync after
* a future focus_in/enable.
*/
global->done_serial++;
/* after disable, incoming state changes won't take effect anyway */
if (context_wayland->current_preedit.text)
{
text_input_preedit (global, global->text_input, NULL, 0, 0);
text_input_preedit_apply (global);
}
}
static void
text_input_enter (void *data,
struct zwp_text_input_v3 *text_input,
struct wl_surface *surface)
{
GtkIMContextWaylandGlobal *global = data;
global->focused = TRUE;
if (global->current)
enable (GTK_IM_CONTEXT_WAYLAND (global->current), global);
}
static void
text_input_leave (void *data,
struct zwp_text_input_v3 *text_input,
struct wl_surface *surface)
{
GtkIMContextWaylandGlobal *global = data;
global->focused = FALSE;
if (global->current)
disable (GTK_IM_CONTEXT_WAYLAND (global->current), global);
}
static const struct zwp_text_input_v3_listener text_input_listener = {
text_input_enter,
text_input_leave,
text_input_preedit,
text_input_commit,
text_input_delete_surrounding_text,
text_input_done,
};
static void
registry_handle_global (void *data,
struct wl_registry *registry,
uint32_t id,
const char *interface,
uint32_t version)
{
GtkIMContextWaylandGlobal *global = data;
GdkSeat *seat = gdk_display_get_default_seat (gdk_display_get_default ());
if (strcmp (interface, "zwp_text_input_manager_v3") == 0)
{
global->text_input_manager_wl_id = id;
global->text_input_manager =
wl_registry_bind (global->registry, global->text_input_manager_wl_id,
&zwp_text_input_manager_v3_interface, 1);
global->text_input =
zwp_text_input_manager_v3_get_text_input (global->text_input_manager,
gdk_wayland_seat_get_wl_seat (seat));
global->serial = 0;
zwp_text_input_v3_add_listener (global->text_input,
&text_input_listener, global);
}
}
static void
registry_handle_global_remove (void *data,
struct wl_registry *registry,
uint32_t id)
{
GtkIMContextWaylandGlobal *global = data;
if (id != global->text_input_manager_wl_id)
return;
g_clear_pointer (&global->text_input, zwp_text_input_v3_destroy);
g_clear_pointer (&global->text_input_manager, zwp_text_input_manager_v3_destroy);
}
static const struct wl_registry_listener registry_listener = {
registry_handle_global,
registry_handle_global_remove
};
static void
gtk_im_context_wayland_global_free (gpointer data)
{
GtkIMContextWaylandGlobal *global = data;
g_free (global);
}
static GtkIMContextWaylandGlobal *
gtk_im_context_wayland_global_get (GdkDisplay *display)
{
GtkIMContextWaylandGlobal *global;
global = g_object_get_data (G_OBJECT (display), "gtk-im-context-wayland-global");
if (global != NULL)
return global;
global = g_new0 (GtkIMContextWaylandGlobal, 1);
global->display = gdk_wayland_display_get_wl_display (display);
global->registry = wl_display_get_registry (global->display);
wl_registry_add_listener (global->registry, &registry_listener, global);
g_object_set_data_full (G_OBJECT (display),
"gtk-im-context-wayland-global",
global,
gtk_im_context_wayland_global_free);
return global;
}
static void
gtk_im_context_wayland_focus_in (GtkIMContext *context)
{
GtkIMContextWayland *self = GTK_IM_CONTEXT_WAYLAND (context);
GtkIMContextWaylandGlobal *global;
if (self->widget == NULL)
return;
global = gtk_im_context_wayland_global_get (gtk_widget_get_display (self->widget));
if (global->current == context)
return;
global->current = context;
if (!global->text_input)
return;
if (self->gesture)
gtk_event_controller_reset (GTK_EVENT_CONTROLLER (self->gesture));
if (global->focused)
enable (self, global);
}
static void
gtk_im_context_wayland_focus_out (GtkIMContext *context)
{
GtkIMContextWayland *self = GTK_IM_CONTEXT_WAYLAND (context);
GtkIMContextWaylandGlobal *global;
global = gtk_im_context_wayland_get_global (self);
if (global == NULL)
return;
if (global->focused)
disable (self, global);
global->current = NULL;
}
static void
gtk_im_context_wayland_reset (GtkIMContext *context)
{
notify_im_change (GTK_IM_CONTEXT_WAYLAND (context),
ZWP_TEXT_INPUT_V3_CHANGE_CAUSE_OTHER);
GTK_IM_CONTEXT_CLASS (gtk_im_context_wayland_parent_class)->reset (context);
}
static void
gtk_im_context_wayland_set_cursor_location (GtkIMContext *context,
GdkRectangle *rect)
{
GtkIMContextWayland *context_wayland;
int side;
context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
if (context_wayland->cursor_rect.x == rect->x &&
context_wayland->cursor_rect.y == rect->y &&
context_wayland->cursor_rect.width == rect->width &&
context_wayland->cursor_rect.height == rect->height)
return;
/* Reset the gesture if the cursor changes too far (eg. clicking
* between disjoint positions in the text).
*
* Still Allow some jittering (a square almost double the cursor rect height
* on either side) as clicking on the exact same position between characters
* is hard.
*/
side = context_wayland->cursor_rect.height;
if (context_wayland->gesture &&
(ABS (rect->x - context_wayland->cursor_rect.x) >= side ||
ABS (rect->y - context_wayland->cursor_rect.y) >= side))
gtk_event_controller_reset (GTK_EVENT_CONTROLLER (context_wayland->gesture));
context_wayland->cursor_rect = *rect;
}
static void
gtk_im_context_wayland_set_use_preedit (GtkIMContext *context,
gboolean use_preedit)
{
GtkIMContextWayland *context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
context_wayland->use_preedit = !!use_preedit;
}
static void
gtk_im_context_wayland_set_surrounding (GtkIMContext *context,
const char *text,
int len,
int cursor_index,
int selection_bound)
{
GtkIMContextWayland *context_wayland;
context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
if (context_wayland->surrounding.text && text &&
(len < 0 || len == strlen (context_wayland->surrounding.text)) &&
strncmp (context_wayland->surrounding.text, text, len) == 0 &&
context_wayland->surrounding.cursor_idx == cursor_index &&
context_wayland->surrounding.anchor_idx == selection_bound)
return;
g_free (context_wayland->surrounding.text);
context_wayland->surrounding.text = g_strndup (text, len);
context_wayland->surrounding.cursor_idx = cursor_index;
context_wayland->surrounding.anchor_idx = selection_bound;
}
static gboolean
gtk_im_context_wayland_get_surrounding (GtkIMContext *context,
char **text,
int *cursor_index,
int *selection_bound)
{
GtkIMContextWayland *context_wayland;
context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
if (!context_wayland->surrounding.text)
return FALSE;
*text = context_wayland->surrounding.text;
*cursor_index = context_wayland->surrounding.cursor_idx;
*selection_bound = context_wayland->surrounding.anchor_idx;
return TRUE;
}
static void
gtk_im_context_wayland_class_init (GtkIMContextWaylandClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (klass);
object_class->finalize = gtk_im_context_wayland_finalize;
im_context_class->set_client_widget = gtk_im_context_wayland_set_client_widget;
im_context_class->get_preedit_string = gtk_im_context_wayland_get_preedit_string;
im_context_class->filter_keypress = gtk_im_context_wayland_filter_keypress;
im_context_class->focus_in = gtk_im_context_wayland_focus_in;
im_context_class->focus_out = gtk_im_context_wayland_focus_out;
im_context_class->reset = gtk_im_context_wayland_reset;
im_context_class->set_cursor_location = gtk_im_context_wayland_set_cursor_location;
im_context_class->set_use_preedit = gtk_im_context_wayland_set_use_preedit;
im_context_class->set_surrounding_with_selection = gtk_im_context_wayland_set_surrounding;
im_context_class->get_surrounding_with_selection = gtk_im_context_wayland_get_surrounding;
}
static void
on_content_type_changed (GtkIMContextWayland *context)
{
notify_content_type (context);
commit_state (context);
}
static void
gtk_im_context_wayland_init (GtkIMContextWayland *context)
{
context->use_preedit = TRUE;
g_signal_connect_swapped (context, "notify::input-purpose",
G_CALLBACK (on_content_type_changed), context);
g_signal_connect_swapped (context, "notify::input-hints",
G_CALLBACK (on_content_type_changed), context);
}
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