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+/* vim:set et ts=4 sts=4:
+ *
+ * ibus-libzhuyin - New Zhuyin engine based on libzhuyin for IBus
+ *
+ * Copyright (c) 2014 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 "ZYZZhuyinEngine.h"
+#include <string>
+#include "ZYConfig.h"
+#include "ZYZConfig.h"
+#include "ZYRawEditor.h"
+#include "ZYZZhuyinEditor.h"
+
+
+using namespace ZY;
+
+/* constructor */
+ZhuyinEngine::ZhuyinEngine (IBusEngine *engine)
+    : Engine (engine),
+      m_props (ZhuyinConfig::instance ()),
+      m_prev_pressed_key (IBUS_VoidSymbol),
+      m_input_mode (MODE_INIT)
+{
+    gint i;
+
+    m_zhuyin_scheme = ZhuyinConfig::instance ().keyboardLayout ();
+
+    switch (m_zhuyin_scheme) {
+    case CHEWING_STANDARD ... CHEWING_DACHEN_CP26:
+        m_editors[MODE_INIT].reset
+            (new ZhuyinEditor (m_props, ZhuyinConfig::instance ()));
+        break;
+    case FULL_PINYIN_HANYU ... FULL_PINYIN_SECONDARY_BOPOMOFO:
+        assert (FALSE);
+#if 0
+        m_editors[MODE_INIT].reset
+            (new PinyinEditor (m_props, ZhuyinConfig::instance ()));
+#endif
+        break;
+    default:
+        assert (FALSE);
+    }
+
+    m_editors[MODE_RAW].reset
+        (new RawEditor (m_props, PinyinConfig::instance ()));
+
+    m_props.signalUpdateProperty ().connect
+        (std::bind (&ZhuyinEngine::updateProperty, this, _1));
+
+    for (i = MODE_INIT; i < MODE_LAST; i ++) {
+        connectEditorSignals (m_editors[i]);
+    }
+}
+
+/* destructor */
+ZhuyinEngine::~ZhuyinEngine (void)
+{
+}
+
+gboolean
+ZhuyinEngine::processKeyEvent (guint keyval, guint keycode, guint modifiers)
+{
+    gboolean retval = FALSE;
+
+    if (contentIsPassword ())
+        return retval;
+
+    /* check Shift or Ctrl + Release hotkey,
+     * and then ignore other Release key event */
+    if (modifiers & IBUS_RELEASE_MASK) {
+        /* press and release keyval are same,
+         * and no other key event between the press and release key event */
+        gboolean triggered = FALSE;
+
+        if (m_prev_pressed_key == keyval) {
+            if (keyval == IBUS_Shift_L || keyval == IBUS_Shift_R)
+                triggered = TRUE;
+        }
+
+        if (triggered && m_editors[m_input_mode]->text ().empty ()) {
+            /* switch input editor. */
+            m_props.toggleModeChinese ();
+
+            switch (m_input_mode) {
+            case MODE_INIT:
+                m_input_mode = MODE_RAW;
+                break;
+            case MODE_RAW:
+                m_input_mode = MODE_INIT;
+                break;
+            }
+
+            return TRUE;
+        }
+    }
+
+    retval = m_editors[m_input_mode]->processKeyEvent (keyval, keycode, modifiers);
+
+    /* store ignored key event by editors */
+    m_prev_pressed_key = retval ? IBUS_VoidSymbol : keyval;
+
+    return retval;
+}