write PYPSuggestionCandidates.cc

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diff --git a/src/PYPSuggestionCandidates.cc b/src/PYPSuggestionCandidates.cc
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+++ b/src/PYPSuggestionCandidates.cc
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+/* vim:set et ts=4 sts=4:
+ *
+ * ibus-libpinyin - Intelligent Pinyin engine based on libpinyin for IBus
+ *
+ * Copyright (c) 2018 Peng Wu <alexepico@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.
+ */
+
+#include "PYPSuggestionCandidates.h"
+#include <assert.h>
+#include <pinyin.h>
+#include "PYPPhoneticEditor.h"
+
+using namespace PY;
+
+gboolean
+SuggestionCandidates::processCandidates (std::vector<EnhancedCandidate> & candidates)
+{
+    pinyin_instance_t *instance = m_editor->m_instance;
+
+    guint len = 0;
+    pinyin_get_n_candidate (instance, &len);
+
+    for (guint i = 0; i < len; i++) {
+        lookup_candidate_t * candidate = NULL;
+        pinyin_get_candidate (instance, i, &candidate);
+
+        lookup_candidate_type_t type;
+        pinyin_get_candidate_type (instance, candidate, &type);
+        assert (PREDICTED_CANDIDATE == type);
+
+        const gchar * phrase_string = NULL;
+        pinyin_get_candidate_string (instance, candidate, &phrase_string);
+
+        EnhancedCandidate enhanced;
+        enhanced.m_candidate_type = CANDIDATE_SUGGESTION;
+        enhanced.m_candidate_id = i;
+        enhanced.m_display_string = phrase_string;
+
+        candidates.push_back (enhanced);
+    }
+
+    return TRUE;
+}
+
+SelectCandidateAction
+SuggestionCandidates::selectCandidate (EnhancedCandidate & enhanced)
+{
+    pinyin_instance_t * instance = m_editor->m_instance;
+    assert (CANDIDATE_SUGGESTION == enhanced.m_candidate_type);
+
+    guint len = 0;
+    pinyin_get_n_candidate (instance, &len);
+
+    if (G_UNLIKELY (enhanced.m_candidate_id >= len))
+        return SELECT_CANDIDATE_ALREADY_HANDLED;
+
+    lookup_candidate_t * candidate = NULL;
+    pinyin_get_candidate (instance, enhanced.m_candidate_id, &candidate);
+    pinyin_choose_predicted_candidate (instance, candidate);
+
+    return SELECT_CANDIDATE_COMMIT;
+}