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fl_key_embedder_responder.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef FLUTTER_SHELL_PLATFORM_LINUX_FL_KEY_EMBEDDER_RESPONDER_H_
6 #define FLUTTER_SHELL_PLATFORM_LINUX_FL_KEY_EMBEDDER_RESPONDER_H_
7
8 #include <gdk/gdk.h>
9 #include <functional>
10
11 #include "flutter/shell/platform/linux/fl_key_responder.h"
12 #include "flutter/shell/platform/linux/fl_keyboard_handler.h"
13 #include "flutter/shell/platform/linux/public/flutter_linux/fl_binary_messenger.h"
14 #include "flutter/shell/platform/linux/public/flutter_linux/fl_value.h"
15
16 constexpr int kMaxConvertedKeyData = 3;
17
18 // The signature of a function that FlKeyEmbedderResponder calls on every key
19 // event.
20 //
21 // The `user_data` is opaque data managed by the object that creates
22 // FlKeyEmbedderResponder, and is registered along with this callback
23 // via `fl_key_embedder_responder_new`.
24 //
25 // The `callback_user_data` is opaque data managed by FlKeyEmbedderResponder.
26 // Instances of the EmbedderSendKeyEvent callback are required to invoke
27 // `callback` with the `callback_user_data` parameter after the `event` has been
28 // processed.
29 typedef void (*EmbedderSendKeyEvent)(const FlutterKeyEvent* event,
30 FlutterKeyEventCallback callback,
31 void* callback_user_data,
32 void* send_key_event_user_data);
33
34 G_BEGIN_DECLS
35
36 #define FL_TYPE_KEY_EMBEDDER_RESPONDER fl_key_embedder_responder_get_type()
37 G_DECLARE_FINAL_TYPE(FlKeyEmbedderResponder,
38 fl_key_embedder_responder,
39 FL,
40 KEY_EMBEDDER_RESPONDER,
41 GObject);
42
43 /**
44 * FlKeyEmbedderResponder:
45 *
46 * A #FlKeyResponder that handles events by sending the converted events
47 * through the embedder API.
48 *
49 * This class communicates with the HardwareKeyboard API in the framework.
50 */
51
52 /**
53 * fl_key_embedder_responder_new:
54 * @engine: The #FlEngine, whose the embedder API will be used to send
55 * the event.
56 *
57 * Creates a new #FlKeyEmbedderResponder.
58 * @send_key_event: a function that is called on every key event.
59 * @send_key_event_user_data: an opaque pointer that will be sent back as the
60 * last argument of send_key_event, created and managed by the object that holds
61 * FlKeyEmbedderResponder.
62 *
63 * Returns: a new #FlKeyEmbedderResponder.
64 */
65 FlKeyEmbedderResponder* fl_key_embedder_responder_new(
66 EmbedderSendKeyEvent send_key_event,
67 void* send_key_event_user_data);
68
69 /**
70 * fl_key_embedder_responder_sync_modifiers_if_needed:
71 * @responder: the #FlKeyEmbedderResponder self.
72 * @state: the state of the modifiers mask.
73 * @event_time: the time attribute of the incoming GDK event.
74 *
75 * If needed, synthesize modifier keys up and down event by comparing their
76 * current pressing states with the given modifiers mask.
77 */
78 void fl_key_embedder_responder_sync_modifiers_if_needed(
79 FlKeyEmbedderResponder* responder,
80 guint state,
81 double event_time);
82
83 /**
84 * fl_key_embedder_responder_get_pressed_state:
85 * @responder: the #FlKeyEmbedderResponder self.
86 *
87 * Returns the keyboard pressed state. The hash table contains one entry per
88 * pressed keys, mapping from the logical key to the physical key.
89 */
90 GHashTable* fl_key_embedder_responder_get_pressed_state(
91 FlKeyEmbedderResponder* responder);
92
93 G_END_DECLS
94
95 #endif // FLUTTER_SHELL_PLATFORM_LINUX_FL_KEY_EMBEDDER_RESPONDER_H_
fl_key_embedder_responder_get_pressed_state
GHashTable * fl_key_embedder_responder_get_pressed_state(FlKeyEmbedderResponder *responder)
Definition: fl_key_embedder_responder.cc:896
event
FlKeyEvent * event
Definition: fl_key_channel_responder.cc:118
state
AtkStateType state
Definition: fl_accessible_node.cc:10
fl_keyboard_handler.h
fl_binary_messenger.h
fl_key_embedder_responder_new
FlKeyEmbedderResponder * fl_key_embedder_responder_new(EmbedderSendKeyEvent send_key_event, void *send_key_event_user_data)
Definition: fl_key_embedder_responder.cc:263
FL
FL
Definition: fl_binary_messenger.cc:27
kMaxConvertedKeyData
constexpr int kMaxConvertedKeyData
Definition: fl_key_embedder_responder.h:16
send_key_event
static void send_key_event(FlTextInputHandler *handler, gint keyval, gint state=0)
Definition: fl_text_input_handler_test.cc:181
fl_value.h
fl_key_embedder_responder_sync_modifiers_if_needed
void fl_key_embedder_responder_sync_modifiers_if_needed(FlKeyEmbedderResponder *responder, guint state, double event_time)
Definition: fl_key_embedder_responder.cc:879
callback
FlKeyEvent uint64_t FlKeyResponderAsyncCallback callback
Definition: fl_key_channel_responder.cc:120
EmbedderSendKeyEvent
void(* EmbedderSendKeyEvent)(const FlutterKeyEvent *event, FlutterKeyEventCallback callback, void *callback_user_data, void *send_key_event_user_data)
Definition: fl_key_embedder_responder.h:29
G_DECLARE_FINAL_TYPE
G_DECLARE_FINAL_TYPE(FlKeyEmbedderResponder, fl_key_embedder_responder, FL, KEY_EMBEDDER_RESPONDER, GObject)
fl_key_responder.h