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diff --git a/src/PYPCloudCandidates.h b/src/PYPCloudCandidates.h
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+/* vim:set et ts=4 sts=4:
+ *
+ * ibus-libpinyin - Intelligent Pinyin engine based on libpinyin for IBus
+ *
+ * Copyright (c) 2018 linyu Xu <liannaxu07@gmail.com>
+ * Copyright (c) 2020 Weixuan XIAO <veyx.shaw@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __PY_LIB_PINYIN_ClOUD_CANDIDATES_H_
+#define __PY_LIB_PINYIN_ClOUD_CANDIDATES_H_
+
+#include "PYString.h"
+#include "PYPointer.h"
+#include "PYPEnhancedCandidates.h"
+#include <vector>
+#include <libsoup/soup.h>
+#include <json-glib/json-glib.h>
+#include "PYConfig.h"
+
+
+
+class BaiduCloudCandidatesResponseJsonParser;
+class GoogleCloudCandidatesResponseJsonParser;
+
+namespace PY {
+
+#define BUFFERLENGTH 2048
+#define CLOUD_MINIMUM_UTF8_TRIGGER_LENGTH 2
+
+enum InputMode {
+    FullPinyin = 0,
+    DoublePinyin,
+    Bopomofo
+};
+
+class PhoneticEditor;
+
+class CloudCandidates : public EnhancedCandidates<PhoneticEditor>
+{
+public:
+
+    CloudCandidates (PhoneticEditor *editor);
+    ~CloudCandidates();
+
+    void setInputMode (InputMode mode) { m_input_mode = mode; }
+
+    gboolean processCandidates (std::vector<EnhancedCandidate> & candidates);
+
+    int selectCandidate (EnhancedCandidate & enhanced);
+
+    void cloudAsyncRequest (const gchar* requestStr);
+    void cloudSyncRequest (const gchar* requestStr, std::vector<EnhancedCandidate> & candidates);
+
+    void delayedCloudAsyncRequest (const gchar* requestStr);
+
+    void updateLookupTable ();
+
+    guint m_source_event_id;
+    SoupMessage *m_message;
+    std::string m_last_requested_pinyin;
+
+private:
+    static gboolean delayedCloudAsyncRequestCallBack (gpointer user_data);
+    static void delayedCloudAsyncRequestDestroyCallBack (gpointer user_data);
+    static void cloudResponseCallBack (GObject *object, GAsyncResult *result, gpointer user_data);
+
+    void processCloudResponse (GInputStream *stream, std::vector<EnhancedCandidate> & candidates);
+
+    /* get internal full pinyin representation */
+    String getFullPinyin ();
+private:
+    SoupSession *m_session;
+    InputMode m_input_mode;
+
+    BaiduCloudCandidatesResponseJsonParser *m_baidu_parser;
+    GoogleCloudCandidatesResponseJsonParser *m_google_parser;
+protected:
+    std::vector<EnhancedCandidate> m_candidates;
+};
+
+};
+
+#endif
+
+