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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 | +#include "flutter/shell/platform/linux/public/flutter_linux/fl_basic_message_channel.h" |
| 6 | + |
| 7 | +#include <gmodule.h> |
| 8 | + |
| 9 | +typedef struct { |
| 10 | + // Messenger to communicate on |
| 11 | + FlBinaryMessenger* messenger; |
| 12 | + |
| 13 | + // Channel name |
| 14 | + gchar* name; |
| 15 | + |
| 16 | + // Codec to en/decode messages |
| 17 | + FlMessageCodec* codec; |
| 18 | + |
| 19 | + // Function called when a message is received |
| 20 | + FlBasicMessageChannelMessageHandler message_handler; |
| 21 | + gpointer message_handler_data; |
| 22 | +} FlBasicMessageChannelPrivate; |
| 23 | + |
| 24 | +// Added here to stop the compiler from optimising this function away |
| 25 | +G_MODULE_EXPORT GType fl_basic_message_channel_get_type(); |
| 26 | + |
| 27 | +enum { PROP_MESSENGER = 1, PROP_NAME, PROP_CODEC, PROP_LAST }; |
| 28 | + |
| 29 | +G_DEFINE_TYPE_WITH_PRIVATE(FlBasicMessageChannel, |
| 30 | + fl_basic_message_channel, |
| 31 | + G_TYPE_OBJECT) |
| 32 | + |
| 33 | +// Called when a binary message is received on this channel |
| 34 | +static void message_cb(FlBinaryMessenger* messenger, |
| 35 | + const gchar* channel, |
| 36 | + GBytes* message, |
| 37 | + FlBinaryMessengerResponseHandle* response_handle, |
| 38 | + gpointer user_data) { |
| 39 | + FlBasicMessageChannel* self = FL_BASIC_MESSAGE_CHANNEL(user_data); |
| 40 | + FlBasicMessageChannelPrivate* priv = |
| 41 | + static_cast<FlBasicMessageChannelPrivate*>( |
| 42 | + fl_basic_message_channel_get_instance_private(self)); |
| 43 | + |
| 44 | + if (priv->message_handler == nullptr) { |
| 45 | + fl_binary_messenger_send_response(messenger, response_handle, nullptr, |
| 46 | + nullptr); |
| 47 | + return; |
| 48 | + } |
| 49 | + |
| 50 | + g_autoptr(GError) error = nullptr; |
| 51 | + g_autoptr(FlValue) message_value = |
| 52 | + fl_message_codec_decode_message(priv->codec, message, &error); |
| 53 | + if (message_value == nullptr) |
| 54 | + g_warning("Failed to decode message: %s", error->message); |
| 55 | + else |
| 56 | + priv->message_handler(self, message_value, priv->message_handler_data); |
| 57 | + |
| 58 | + fl_binary_messenger_send_response(messenger, response_handle, nullptr, |
| 59 | + nullptr); |
| 60 | +} |
| 61 | + |
| 62 | +// Called when a response is received to a sent message |
| 63 | +static void message_response_cb(GObject* object, |
| 64 | + GAsyncResult* result, |
| 65 | + gpointer user_data) { |
| 66 | + g_autoptr(GError) error = nullptr; |
| 67 | + g_autoptr(GBytes) response = fl_binary_messenger_send_on_channel_finish( |
| 68 | + FL_BINARY_MESSENGER(object), result, &error); |
| 69 | + if (response == nullptr) |
| 70 | + g_warning("Failed to send on basic message channel: %s", error->message); |
| 71 | +} |
| 72 | + |
| 73 | +static void fl_basic_message_channel_set_property(GObject* object, |
| 74 | + guint prop_id, |
| 75 | + const GValue* value, |
| 76 | + GParamSpec* pspec) { |
| 77 | + FlBasicMessageChannel* self = FL_BASIC_MESSAGE_CHANNEL(object); |
| 78 | + FlBasicMessageChannelPrivate* priv = |
| 79 | + static_cast<FlBasicMessageChannelPrivate*>( |
| 80 | + fl_basic_message_channel_get_instance_private(self)); |
| 81 | + |
| 82 | + switch (prop_id) { |
| 83 | + case PROP_MESSENGER: |
| 84 | + g_set_object(&priv->messenger, |
| 85 | + FL_BINARY_MESSENGER(g_value_get_object(value))); |
| 86 | + break; |
| 87 | + case PROP_NAME: |
| 88 | + g_free(priv->name); |
| 89 | + priv->name = g_value_dup_string(value); |
| 90 | + break; |
| 91 | + case PROP_CODEC: |
| 92 | + g_set_object(&priv->codec, FL_MESSAGE_CODEC(g_value_get_object(value))); |
| 93 | + break; |
| 94 | + default: |
| 95 | + G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec); |
| 96 | + break; |
| 97 | + } |
| 98 | +} |
| 99 | + |
| 100 | +static void fl_basic_message_channel_get_property(GObject* object, |
| 101 | + guint prop_id, |
| 102 | + GValue* value, |
| 103 | + GParamSpec* pspec) { |
| 104 | + FlBasicMessageChannel* self = FL_BASIC_MESSAGE_CHANNEL(object); |
| 105 | + FlBasicMessageChannelPrivate* priv = |
| 106 | + static_cast<FlBasicMessageChannelPrivate*>( |
| 107 | + fl_basic_message_channel_get_instance_private(self)); |
| 108 | + |
| 109 | + switch (prop_id) { |
| 110 | + case PROP_MESSENGER: |
| 111 | + g_value_set_object(value, priv->messenger); |
| 112 | + break; |
| 113 | + case PROP_NAME: |
| 114 | + g_value_set_string(value, priv->name); |
| 115 | + break; |
| 116 | + case PROP_CODEC: |
| 117 | + g_value_set_object(value, priv->codec); |
| 118 | + break; |
| 119 | + default: |
| 120 | + G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec); |
| 121 | + break; |
| 122 | + } |
| 123 | +} |
| 124 | + |
| 125 | +static void fl_basic_message_channel_constructed(GObject* object) { |
| 126 | + FlBasicMessageChannel* self = FL_BASIC_MESSAGE_CHANNEL(object); |
| 127 | + FlBasicMessageChannelPrivate* priv = |
| 128 | + static_cast<FlBasicMessageChannelPrivate*>( |
| 129 | + fl_basic_message_channel_get_instance_private(self)); |
| 130 | + |
| 131 | + fl_binary_messenger_set_message_handler_on_channel( |
| 132 | + priv->messenger, priv->name, message_cb, self); |
| 133 | + |
| 134 | + G_OBJECT_CLASS(fl_basic_message_channel_parent_class)->constructed(object); |
| 135 | +} |
| 136 | + |
| 137 | +static void fl_basic_message_channel_dispose(GObject* object) { |
| 138 | + FlBasicMessageChannel* self = FL_BASIC_MESSAGE_CHANNEL(object); |
| 139 | + FlBasicMessageChannelPrivate* priv = |
| 140 | + static_cast<FlBasicMessageChannelPrivate*>( |
| 141 | + fl_basic_message_channel_get_instance_private(self)); |
| 142 | + |
| 143 | + if (priv->messenger != nullptr) |
| 144 | + fl_binary_messenger_set_message_handler_on_channel( |
| 145 | + priv->messenger, priv->name, nullptr, nullptr); |
| 146 | + |
| 147 | + g_clear_object(&priv->messenger); |
| 148 | + g_clear_pointer(&priv->name, g_free); |
| 149 | + g_clear_object(&priv->codec); |
| 150 | + |
| 151 | + G_OBJECT_CLASS(fl_basic_message_channel_parent_class)->dispose(object); |
| 152 | +} |
| 153 | + |
| 154 | +static void fl_basic_message_channel_class_init( |
| 155 | + FlBasicMessageChannelClass* klass) { |
| 156 | + G_OBJECT_CLASS(klass)->set_property = fl_basic_message_channel_set_property; |
| 157 | + G_OBJECT_CLASS(klass)->get_property = fl_basic_message_channel_get_property; |
| 158 | + G_OBJECT_CLASS(klass)->constructed = fl_basic_message_channel_constructed; |
| 159 | + G_OBJECT_CLASS(klass)->dispose = fl_basic_message_channel_dispose; |
| 160 | + |
| 161 | + g_object_class_install_property( |
| 162 | + G_OBJECT_CLASS(klass), PROP_CODEC, |
| 163 | + g_param_spec_object( |
| 164 | + "codec", "codec", "Message codec", fl_message_codec_get_type(), |
| 165 | + static_cast<GParamFlags>(G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | |
| 166 | + G_PARAM_STATIC_STRINGS))); |
| 167 | +} |
| 168 | + |
| 169 | +static void fl_basic_message_channel_init(FlBasicMessageChannel* self) {} |
| 170 | + |
| 171 | +G_MODULE_EXPORT FlBasicMessageChannel* fl_basic_message_channel_new( |
| 172 | + FlBinaryMessenger* messenger, |
| 173 | + const gchar* name, |
| 174 | + FlMessageCodec* codec) { |
| 175 | + g_return_val_if_fail(FL_IS_BINARY_MESSENGER(messenger), nullptr); |
| 176 | + g_return_val_if_fail(name != nullptr, nullptr); |
| 177 | + g_return_val_if_fail(FL_IS_MESSAGE_CODEC(codec), nullptr); |
| 178 | + |
| 179 | + return FL_BASIC_MESSAGE_CHANNEL( |
| 180 | + g_object_new(fl_basic_message_channel_get_type(), "messenger", messenger, |
| 181 | + "name", name, "codec", codec, nullptr)); |
| 182 | +} |
| 183 | + |
| 184 | +G_MODULE_EXPORT void fl_basic_message_channel_set_message_handler( |
| 185 | + FlBasicMessageChannel* self, |
| 186 | + FlBasicMessageChannelMessageHandler handler, |
| 187 | + gpointer user_data) { |
| 188 | + g_return_if_fail(FL_IS_BASIC_MESSAGE_CHANNEL(self)); |
| 189 | + FlBasicMessageChannelPrivate* priv = |
| 190 | + static_cast<FlBasicMessageChannelPrivate*>( |
| 191 | + fl_basic_message_channel_get_instance_private(self)); |
| 192 | + |
| 193 | + priv->message_handler = handler; |
| 194 | + priv->message_handler_data = user_data; |
| 195 | +} |
| 196 | + |
| 197 | +G_MODULE_EXPORT gboolean |
| 198 | +fl_basic_message_channel_send(FlBasicMessageChannel* self, |
| 199 | + FlValue* message, |
| 200 | + GError** error) { |
| 201 | + FlBasicMessageChannelPrivate* priv = |
| 202 | + static_cast<FlBasicMessageChannelPrivate*>( |
| 203 | + fl_basic_message_channel_get_instance_private(self)); |
| 204 | + |
| 205 | + g_return_val_if_fail(FL_IS_BASIC_MESSAGE_CHANNEL(self), FALSE); |
| 206 | + g_return_val_if_fail(message != nullptr, FALSE); |
| 207 | + |
| 208 | + g_autoptr(GBytes) data = |
| 209 | + fl_message_codec_encode_message(priv->codec, message, error); |
| 210 | + if (data == nullptr) |
| 211 | + return FALSE; |
| 212 | + |
| 213 | + fl_binary_messenger_send_on_channel(priv->messenger, priv->name, data, |
| 214 | + nullptr, message_response_cb, nullptr); |
| 215 | + |
| 216 | + return TRUE; |
| 217 | +} |
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