commit 5a20879a13440df2bb5848b95b29c1c2e1ac7d00
Author: Fuminobu TAKEYAMA <ftake@geeko.jp>
Date:   Wed Sep 23 06:05:35 2015 +0900

    IBus: Implement hide_preedit_text and show_preedit_text

diff --git a/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.cpp b/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.cpp
index 2027e01..3d7918e 100644
--- a/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.cpp
+++ b/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.cpp
@@ -81,6 +81,7 @@ public:
 
     bool valid;
     QString predit;
+    QList<QInputMethodEvent::Attribute> attributes;
     bool needsSurroundingText;
 };
 
@@ -93,6 +94,8 @@ QIBusPlatformInputContext::QIBusPlatformInputContext ()
         connect(d->context, SIGNAL(UpdatePreeditText(QDBusVariant,uint,bool)), this, SLOT(updatePreeditText(QDBusVariant,uint,bool)));
         connect(d->context, SIGNAL(DeleteSurroundingText(int,uint)), this, SLOT(deleteSurroundingText(int,uint)));
         connect(d->context, SIGNAL(RequireSurroundingText()), this, SLOT(surroundingTextRequired()));
+        connect(d->context, SIGNAL(HidePreeditText()), this, SLOT(hidePreeditText()));
+        connect(d->context, SIGNAL(ShowPreeditText()), this, SLOT(showPreeditText()));
     }
     QInputMethod *p = qApp->inputMethod();
     connect(p, SIGNAL(cursorRectangleChanged()), this, SLOT(cursorRectChanged()));
@@ -133,6 +136,7 @@ void QIBusPlatformInputContext::reset()
 
     d->context->Reset();
     d->predit = QString();
+    d->attributes.clear();
 }
 
 void QIBusPlatformInputContext::commit()
@@ -145,6 +149,7 @@ void QIBusPlatformInputContext::commit()
     QObject *input = qApp->focusObject();
     if (!input) {
         d->predit = QString();
+        d->attributes.clear();
         return;
     }
 
@@ -156,6 +161,7 @@ void QIBusPlatformInputContext::commit()
 
     d->context->Reset();
     d->predit = QString();
+    d->attributes.clear();
 }
 
 
@@ -242,6 +248,7 @@ void QIBusPlatformInputContext::commitText(const QDBusVariant &text)
     QCoreApplication::sendEvent(input, &event);
 
     d->predit = QString();
+    d->attributes.clear();
 }
 
 void QIBusPlatformInputContext::updatePreeditText(const QDBusVariant &text, uint cursorPos, bool visible)
@@ -257,11 +264,11 @@ void QIBusPlatformInputContext::updatePreeditText(const QDBusVariant &text, uint
     if (debug)
         qDebug() << "preedit text:" << t.text;
 
-    QList<QInputMethodEvent::Attribute> attributes = t.attributes.imAttributes();
+    d->attributes = t.attributes.imAttributes();
     if (!t.text.isEmpty())
-        attributes += QInputMethodEvent::Attribute(QInputMethodEvent::Cursor, cursorPos, visible ? 1 : 0, QVariant());
+        d->attributes += QInputMethodEvent::Attribute(QInputMethodEvent::Cursor, cursorPos, visible ? 1 : 0, QVariant());
 
-    QInputMethodEvent event(t.text, attributes);
+    QInputMethodEvent event(t.text, d->attributes);
     QCoreApplication::sendEvent(input, &event);
 
     d->predit = t.text;
@@ -384,6 +391,28 @@ void QIBusPlatformInputContext::filterEventFinished(QDBusPendingCallWatcher *cal
     call->deleteLater();
 }
 
+void QIBusPlatformInputContext::hidePreeditText()
+{
+    QObject *input = qApp->focusObject();
+    if (!input)
+        return;
+
+    QList<QInputMethodEvent::Attribute> attributes;
+
+    QInputMethodEvent event("", attributes);
+    QCoreApplication::sendEvent(input, &event);
+}
+
+void QIBusPlatformInputContext::showPreeditText()
+{
+    QObject *input = qApp->focusObject();
+    if (!input)
+        return;
+
+    QInputMethodEvent event(d->predit, d->attributes);
+    QCoreApplication::sendEvent(input, &event);
+}
+
 QIBusPlatformInputContextPrivate::QIBusPlatformInputContextPrivate()
     : connection(createConnection()),
       bus(0),
diff --git a/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.h b/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.h
index 91f15ea..9b19b22 100644
--- a/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.h
+++ b/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.h
@@ -95,6 +95,8 @@ public Q_SLOTS:
     void deleteSurroundingText(int offset, uint n_chars);
     void surroundingTextRequired();
     void filterEventFinished(QDBusPendingCallWatcher *call);
+    void hidePreeditText();
+    void showPreeditText();
 
 private:
     QIBusPlatformInputContextPrivate *d;