Support multiple native surfaces on Android.

Support for multiple native surfaces is needed by applications that need
to mix raster windows with GL windows.
Rework the raster and opengl implementation, get rid of eglfs and
fbconvenience dependencies.
Create a single android platform plugin.

[ChangeLog][Android] Rework the raster and opengl implementation.
[ChangeLog][Android] Create a single android platform plugin.

Task-number: QTBUG-34650

Change-Id: I9b1ab51554823329dda8cfbf8fef27c38f917c7b
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>

1 files changed, 762 insertions, 0 deletions

diff --git a/src/plugins/platforms/android/qandroidinputcontext.cpp b/src/plugins/platforms/android/qandroidinputcontext.cpp
new file mode 100644
index 0000000000..326972e71e
--- /dev/null
+++ b/src/plugins/platforms/android/qandroidinputcontext.cpp
@@ -0,0 +1,762 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 BogDan Vatra <bogdan@kde.org>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <android/log.h>
+
+#include "qandroidinputcontext.h"
+#include "androidjnimain.h"
+#include "androidjniinput.h"
+#include <QDebug>
+#include <qevent.h>
+#include <qguiapplication.h>
+#include <qsharedpointer.h>
+#include <qthread.h>
+#include <qinputmethod.h>
+#include <qwindow.h>
+
+#include <QTextCharFormat>
+
+#include <QDebug>
+
+QT_BEGIN_NAMESPACE
+
+static QAndroidInputContext *m_androidInputContext = 0;
+static char const *const QtNativeInputConnectionClassName = "org.qtproject.qt5.android.QtNativeInputConnection";
+static char const *const QtExtractedTextClassName = "org.qtproject.qt5.android.QtExtractedText";
+static jclass m_extractedTextClass = 0;
+static jmethodID m_classConstructorMethodID = 0;
+static jfieldID m_partialEndOffsetFieldID = 0;
+static jfieldID m_partialStartOffsetFieldID = 0;
+static jfieldID m_selectionEndFieldID = 0;
+static jfieldID m_selectionStartFieldID = 0;
+static jfieldID m_startOffsetFieldID = 0;
+static jfieldID m_textFieldID = 0;
+
+static jboolean commitText(JNIEnv *env, jobject /*thiz*/, jstring text, jint newCursorPosition)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+    jboolean isCopy;
+    const jchar *jstr = env->GetStringChars(text, &isCopy);
+    QString str(reinterpret_cast<const QChar *>(jstr), env->GetStringLength(text));
+    env->ReleaseStringChars(text, jstr);
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ COMMIT" << str;
+#endif
+    return m_androidInputContext->commitText(str, newCursorPosition);
+}
+
+static jboolean deleteSurroundingText(JNIEnv */*env*/, jobject /*thiz*/, jint leftLength, jint rightLength)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ DELETE" << leftLength << rightLength;
+#endif
+    return m_androidInputContext->deleteSurroundingText(leftLength, rightLength);
+}
+
+static jboolean finishComposingText(JNIEnv */*env*/, jobject /*thiz*/)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ FINISH";
+#endif
+    return m_androidInputContext->finishComposingText();
+}
+
+static jint getCursorCapsMode(JNIEnv */*env*/, jobject /*thiz*/, jint reqModes)
+{
+    if (!m_androidInputContext)
+        return 0;
+
+    return m_androidInputContext->getCursorCapsMode(reqModes);
+}
+
+static jobject getExtractedText(JNIEnv *env, jobject /*thiz*/, int hintMaxChars, int hintMaxLines, jint flags)
+{
+    if (!m_androidInputContext)
+        return 0;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ GETEX";
+#endif
+    const QAndroidInputContext::ExtractedText &extractedText =
+            m_androidInputContext->getExtractedText(hintMaxChars, hintMaxLines, flags);
+
+    jobject object = env->NewObject(m_extractedTextClass, m_classConstructorMethodID);
+    env->SetIntField(object, m_partialStartOffsetFieldID, extractedText.partialStartOffset);
+    env->SetIntField(object, m_partialEndOffsetFieldID, extractedText.partialEndOffset);
+    env->SetIntField(object, m_selectionStartFieldID, extractedText.selectionStart);
+    env->SetIntField(object, m_selectionEndFieldID, extractedText.selectionEnd);
+    env->SetIntField(object, m_startOffsetFieldID, extractedText.startOffset);
+    env->SetObjectField(object,
+                        m_textFieldID,
+                        env->NewString(reinterpret_cast<const jchar *>(extractedText.text.constData()),
+                                       jsize(extractedText.text.length())));
+
+    return object;
+}
+
+static jstring getSelectedText(JNIEnv *env, jobject /*thiz*/, jint flags)
+{
+    if (!m_androidInputContext)
+        return 0;
+
+    const QString &text = m_androidInputContext->getSelectedText(flags);
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ GETSEL" << text;
+#endif
+    return env->NewString(reinterpret_cast<const jchar *>(text.constData()), jsize(text.length()));
+}
+
+static jstring getTextAfterCursor(JNIEnv *env, jobject /*thiz*/, jint length, jint flags)
+{
+    if (!m_androidInputContext)
+        return 0;
+
+    const QString &text = m_androidInputContext->getTextAfterCursor(length, flags);
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ GET" << length << text;
+#endif
+    return env->NewString(reinterpret_cast<const jchar *>(text.constData()), jsize(text.length()));
+}
+
+static jstring getTextBeforeCursor(JNIEnv *env, jobject /*thiz*/, jint length, jint flags)
+{
+    if (!m_androidInputContext)
+        return 0;
+
+    const QString &text = m_androidInputContext->getTextBeforeCursor(length, flags);
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ GET" << length << text;
+#endif
+    return env->NewString(reinterpret_cast<const jchar *>(text.constData()), jsize(text.length()));
+}
+
+static jboolean setComposingText(JNIEnv *env, jobject /*thiz*/, jstring text, jint newCursorPosition)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+    jboolean isCopy;
+    const jchar *jstr = env->GetStringChars(text, &isCopy);
+    QString str(reinterpret_cast<const QChar *>(jstr), env->GetStringLength(text));
+    env->ReleaseStringChars(text, jstr);
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ SET" << str;
+#endif
+    return m_androidInputContext->setComposingText(str, newCursorPosition);
+}
+
+static jboolean setComposingRegion(JNIEnv */*env*/, jobject /*thiz*/, jint start, jint end)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ SETR" << start << end;
+#endif
+    return m_androidInputContext->setComposingRegion(start, end);
+}
+
+
+static jboolean setSelection(JNIEnv */*env*/, jobject /*thiz*/, jint start, jint end)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ SETSEL" << start << end;
+#endif
+    return m_androidInputContext->setSelection(start, end);
+}
+
+static jboolean selectAll(JNIEnv */*env*/, jobject /*thiz*/)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@ SELALL";
+#endif
+    return m_androidInputContext->selectAll();
+}
+
+static jboolean cut(JNIEnv */*env*/, jobject /*thiz*/)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@";
+#endif
+    return m_androidInputContext->cut();
+}
+
+static jboolean copy(JNIEnv */*env*/, jobject /*thiz*/)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@";
+#endif
+    return m_androidInputContext->copy();
+}
+
+static jboolean copyURL(JNIEnv */*env*/, jobject /*thiz*/)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@";
+#endif
+    return m_androidInputContext->copyURL();
+}
+
+static jboolean paste(JNIEnv */*env*/, jobject /*thiz*/)
+{
+    if (!m_androidInputContext)
+        return JNI_FALSE;
+
+#ifdef QT_DEBUG_ANDROID_IM_PROTOCOL
+    qDebug() << "@@@";
+#endif
+    return m_androidInputContext->paste();
+}
+
+
+static JNINativeMethod methods[] = {
+    {"commitText", "(Ljava/lang/String;I)Z", (void *)commitText},
+    {"deleteSurroundingText", "(II)Z", (void *)deleteSurroundingText},
+    {"finishComposingText", "()Z", (void *)finishComposingText},
+    {"getCursorCapsMode", "(I)I", (void *)getCursorCapsMode},
+    {"getExtractedText", "(III)Lorg/qtproject/qt5/android/QtExtractedText;", (void *)getExtractedText},
+    {"getSelectedText", "(I)Ljava/lang/String;", (void *)getSelectedText},
+    {"getTextAfterCursor", "(II)Ljava/lang/String;", (void *)getTextAfterCursor},
+    {"getTextBeforeCursor", "(II)Ljava/lang/String;", (void *)getTextBeforeCursor},
+    {"setComposingText", "(Ljava/lang/String;I)Z", (void *)setComposingText},
+    {"setComposingRegion", "(II)Z", (void *)setComposingRegion},
+    {"setSelection", "(II)Z", (void *)setSelection},
+    {"selectAll", "()Z", (void *)selectAll},
+    {"cut", "()Z", (void *)cut},
+    {"copy", "()Z", (void *)copy},
+    {"copyURL", "()Z", (void *)copyURL},
+    {"paste", "()Z", (void *)paste}
+};
+
+
+QAndroidInputContext::QAndroidInputContext()
+    : QPlatformInputContext(), m_blockUpdateSelection(false)
+{
+    QtAndroid::AttachedJNIEnv env;
+    if (!env.jniEnv)
+        return;
+
+    jclass clazz = QtAndroid::findClass(QtNativeInputConnectionClassName, env.jniEnv);
+    if (clazz == NULL) {
+        qCritical() << "Native registration unable to find class '"
+                    << QtNativeInputConnectionClassName
+                    << "'";
+        return;
+    }
+
+    if (env.jniEnv->RegisterNatives(clazz, methods, sizeof(methods) / sizeof(methods[0])) < 0) {
+        qCritical() << "RegisterNatives failed for '"
+                    << QtNativeInputConnectionClassName
+                    << "'";
+        return;
+    }
+
+    clazz = QtAndroid::findClass(QtExtractedTextClassName, env.jniEnv);
+    if (clazz == NULL) {
+        qCritical() << "Native registration unable to find class '"
+                    << QtExtractedTextClassName
+                    << "'";
+        return;
+    }
+
+    m_extractedTextClass = static_cast<jclass>(env.jniEnv->NewGlobalRef(clazz));
+    m_classConstructorMethodID = env.jniEnv->GetMethodID(m_extractedTextClass, "<init>", "()V");
+    if (m_classConstructorMethodID == NULL) {
+        qCritical() << "GetMethodID failed";
+        return;
+    }
+
+    m_partialEndOffsetFieldID = env.jniEnv->GetFieldID(m_extractedTextClass, "partialEndOffset", "I");
+    if (m_partialEndOffsetFieldID == NULL) {
+        qCritical() << "Can't find field partialEndOffset";
+        return;
+    }
+
+    m_partialStartOffsetFieldID = env.jniEnv->GetFieldID(m_extractedTextClass, "partialStartOffset", "I");
+    if (m_partialStartOffsetFieldID == NULL) {
+        qCritical() << "Can't find field partialStartOffset";
+        return;
+    }
+
+    m_selectionEndFieldID = env.jniEnv->GetFieldID(m_extractedTextClass, "selectionEnd", "I");
+    if (m_selectionEndFieldID == NULL) {
+        qCritical() << "Can't find field selectionEnd";
+        return;
+    }
+
+    m_selectionStartFieldID = env.jniEnv->GetFieldID(m_extractedTextClass, "selectionStart", "I");
+    if (m_selectionStartFieldID == NULL) {
+        qCritical() << "Can't find field selectionStart";
+        return;
+    }
+
+    m_startOffsetFieldID = env.jniEnv->GetFieldID(m_extractedTextClass, "startOffset", "I");
+    if (m_startOffsetFieldID == NULL) {
+        qCritical() << "Can't find field startOffset";
+        return;
+    }
+
+    m_textFieldID = env.jniEnv->GetFieldID(m_extractedTextClass, "text", "Ljava/lang/String;");
+    if (m_textFieldID == NULL) {
+        qCritical() << "Can't find field text";
+        return;
+    }
+    qRegisterMetaType<QInputMethodEvent *>("QInputMethodEvent*");
+    qRegisterMetaType<QInputMethodQueryEvent *>("QInputMethodQueryEvent*");
+    m_androidInputContext = this;
+}
+
+QAndroidInputContext::~QAndroidInputContext()
+{
+    m_androidInputContext = 0;
+    m_extractedTextClass = 0;
+    m_partialEndOffsetFieldID = 0;
+    m_partialStartOffsetFieldID = 0;
+    m_selectionEndFieldID = 0;
+    m_selectionStartFieldID = 0;
+    m_startOffsetFieldID = 0;
+    m_textFieldID = 0;
+}
+
+QAndroidInputContext *QAndroidInputContext::androidInputContext()
+{
+    return m_androidInputContext;
+}
+
+void QAndroidInputContext::reset()
+{
+    clear();
+    if (qGuiApp->focusObject())
+        QtAndroidInput::resetSoftwareKeyboard();
+    else
+        QtAndroidInput::hideSoftwareKeyboard();
+}
+
+void QAndroidInputContext::commit()
+{
+    finishComposingText();
+}
+
+void QAndroidInputContext::updateCursorPosition()
+{
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (!query.isNull() && !m_blockUpdateSelection) {
+        const int cursorPos = query->value(Qt::ImCursorPosition).toInt();
+        QtAndroidInput::updateSelection(cursorPos, cursorPos, -1, -1); //selection empty and no pre-edit text
+    }
+}
+
+void QAndroidInputContext::update(Qt::InputMethodQueries queries)
+{
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery(queries);
+    if (query.isNull())
+        return;
+#warning TODO extract the needed data from query
+}
+
+void QAndroidInputContext::invokeAction(QInputMethod::Action action, int cursorPosition)
+{
+#warning TODO Handle at least QInputMethod::ContextMenu action
+    Q_UNUSED(action)
+    Q_UNUSED(cursorPosition)
+
+    if (action == QInputMethod::Click)
+        commit();
+}
+
+QRectF QAndroidInputContext::keyboardRect() const
+{
+    return QPlatformInputContext::keyboardRect();
+}
+
+bool QAndroidInputContext::isAnimating() const
+{
+    return false;
+}
+
+void QAndroidInputContext::showInputPanel()
+{
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (query.isNull())
+        return;
+
+    disconnect(m_updateCursorPosConnection);
+    if (qGuiApp->focusObject()->metaObject()->indexOfSignal("cursorPositionChanged(int,int)") >= 0) // QLineEdit breaks the pattern
+        m_updateCursorPosConnection = connect(qGuiApp->focusObject(), SIGNAL(cursorPositionChanged(int,int)), this, SLOT(updateCursorPosition()));
+    else
+        m_updateCursorPosConnection = connect(qGuiApp->focusObject(), SIGNAL(cursorPositionChanged()), this, SLOT(updateCursorPosition()));
+    QRectF itemRect = qGuiApp->inputMethod()->inputItemRectangle();
+    QRect rect = qGuiApp->inputMethod()->inputItemTransform().mapRect(itemRect).toRect();
+    QWindow *window = qGuiApp->focusWindow();
+    if (window)
+        rect = QRect(window->mapToGlobal(rect.topLeft()), rect.size());
+
+    QtAndroidInput::showSoftwareKeyboard(rect.left(),
+                                         rect.top(),
+                                         rect.width(),
+                                         rect.height(),
+                                         query->value(Qt::ImHints).toUInt());
+}
+
+void QAndroidInputContext::hideInputPanel()
+{
+    QtAndroidInput::hideSoftwareKeyboard();
+}
+
+bool QAndroidInputContext::isInputPanelVisible() const
+{
+    return QtAndroidInput::isSoftwareKeyboardVisible();
+}
+
+bool QAndroidInputContext::isComposing() const
+{
+    return m_composingText.length();
+}
+
+void QAndroidInputContext::clear()
+{
+    m_composingText.clear();
+    m_extractedText.clear();
+}
+
+void QAndroidInputContext::sendEvent(QObject *receiver, QInputMethodEvent *event)
+{
+    QCoreApplication::sendEvent(receiver, event);
+}
+
+void QAndroidInputContext::sendEvent(QObject *receiver, QInputMethodQueryEvent *event)
+{
+    QCoreApplication::sendEvent(receiver, event);
+}
+
+jboolean QAndroidInputContext::commitText(const QString &text, jint /*newCursorPosition*/)
+{
+    m_composingText = text;
+    return finishComposingText();
+}
+
+jboolean QAndroidInputContext::deleteSurroundingText(jint leftLength, jint rightLength)
+{
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (query.isNull())
+        return JNI_TRUE;
+
+    m_composingText.clear();
+
+    QInputMethodEvent event;
+    event.setCommitString(QString(), -leftLength, leftLength+rightLength);
+    sendInputMethodEvent(&event);
+    clear();
+
+    return JNI_TRUE;
+}
+
+jboolean QAndroidInputContext::finishComposingText()
+{
+    QInputMethodEvent event;
+    event.setCommitString(m_composingText);
+    sendInputMethodEvent(&event);
+    clear();
+
+    return JNI_TRUE;
+}
+
+jint QAndroidInputContext::getCursorCapsMode(jint /*reqModes*/)
+{
+    jint res = 0;
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (query.isNull())
+        return res;
+
+    const uint qtInputMethodHints = query->value(Qt::ImHints).toUInt();
+
+    if (qtInputMethodHints & Qt::ImhPreferUppercase)
+        res = CAP_MODE_SENTENCES;
+
+    if (qtInputMethodHints & Qt::ImhUppercaseOnly)
+        res = CAP_MODE_CHARACTERS;
+
+    return res;
+}
+
+const QAndroidInputContext::ExtractedText &QAndroidInputContext::getExtractedText(jint hintMaxChars, jint /*hintMaxLines*/, jint /*flags*/)
+{
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (query.isNull())
+        return m_extractedText;
+
+    if (hintMaxChars)
+        m_extractedText.text = query->value(Qt::ImSurroundingText).toString().right(hintMaxChars);
+
+    m_extractedText.startOffset = query->value(Qt::ImCursorPosition).toInt();
+    const QString &selection = query->value(Qt::ImCurrentSelection).toString();
+    const int selLen = selection.length();
+    if (selLen) {
+        m_extractedText.selectionStart = query->value(Qt::ImAnchorPosition).toInt();
+        m_extractedText.selectionEnd = m_extractedText.startOffset;
+    }
+
+    return m_extractedText;
+}
+
+QString QAndroidInputContext::getSelectedText(jint /*flags*/)
+{
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (query.isNull())
+        return QString();
+
+    return query->value(Qt::ImCurrentSelection).toString();
+}
+
+QString QAndroidInputContext::getTextAfterCursor(jint length, jint /*flags*/)
+{
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (query.isNull())
+        return QString();
+
+    QString text = query->value(Qt::ImSurroundingText).toString();
+    if (!text.length())
+        return text;
+
+    int cursorPos = query->value(Qt::ImCursorPosition).toInt();
+    return text.mid(cursorPos, length);
+}
+
+QString QAndroidInputContext::getTextBeforeCursor(jint length, jint /*flags*/)
+{
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (query.isNull())
+        return QString();
+
+    QString text = query->value(Qt::ImSurroundingText).toString();
+    if (!text.length())
+        return text;
+
+    int cursorPos = query->value(Qt::ImCursorPosition).toInt();
+    const int wordLeftPos = cursorPos - length;
+    return text.mid(wordLeftPos > 0 ? wordLeftPos : 0, cursorPos);
+}
+
+jboolean QAndroidInputContext::setComposingText(const QString &text, jint newCursorPosition)
+{
+    if (newCursorPosition > 0)
+        newCursorPosition += text.length() - 1;
+    m_composingText = text;
+    QList<QInputMethodEvent::Attribute> attributes;
+    attributes.append(QInputMethodEvent::Attribute(QInputMethodEvent::Cursor,
+                                                   newCursorPosition,
+                                                   1,
+                                                   QVariant()));
+    // Show compose text underlined
+    QTextCharFormat underlined;
+    underlined.setFontUnderline(true);
+    attributes.append(QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat,0, text.length(),
+                                                   QVariant(underlined)));
+
+    QInputMethodEvent event(m_composingText, attributes);
+    sendInputMethodEvent(&event);
+
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (!query.isNull() && !m_blockUpdateSelection) {
+        int cursorPos = query->value(Qt::ImCursorPosition).toInt();
+        int preeditLength = text.length();
+        QtAndroidInput::updateSelection(cursorPos+preeditLength, cursorPos+preeditLength, cursorPos, cursorPos+preeditLength);
+    }
+
+    return JNI_TRUE;
+}
+
+// Android docs say:
+// * start may be after end, same meaning as if swapped
+// * this function must not trigger updateSelection
+// * if start == end then we should stop composing
+jboolean QAndroidInputContext::setComposingRegion(jint start, jint end)
+{
+    QSharedPointer<QInputMethodQueryEvent> query = focusObjectInputMethodQuery();
+    if (query.isNull())
+        return JNI_FALSE;
+
+    if (start > end)
+        qSwap(start, end);
+
+    /*
+      start and end are  cursor positions, not character positions,
+      i.e. selecting the first character is done by start == 0 and end == 1,
+      and start == end means no character selected
+
+      Therefore, the length of the region is end - start
+     */
+    int length = end - start;
+
+    bool updateSelectionWasBlocked = m_blockUpdateSelection;
+    m_blockUpdateSelection = true;
+
+    QString text = query->value(Qt::ImSurroundingText).toString();
+    m_composingText = text.mid(start, length);
+
+    //in the Qt text controls, cursor pos is the start of the preedit
+    int cursorPos = query->value(Qt::ImCursorPosition).toInt();
+    int relativeStart = start - cursorPos;
+
+    QList<QInputMethodEvent::Attribute> attributes;
+
+    // Show compose text underlined
+    QTextCharFormat underlined;
+    underlined.setFontUnderline(true);
+    attributes.append(QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat,0, length,
+                                                   QVariant(underlined)));
+
+    QInputMethodEvent event(m_composingText, attributes);
+    event.setCommitString(QString(), relativeStart, length);
+    sendInputMethodEvent(&event);
+
+    m_blockUpdateSelection = updateSelectionWasBlocked;
+    return JNI_TRUE;
+}
+
+jboolean QAndroidInputContext::setSelection(jint start, jint end)
+{
+    QList<QInputMethodEvent::Attribute> attributes;
+    attributes.append(QInputMethodEvent::Attribute(QInputMethodEvent::Selection,
+                                                   start,
+                                                   end - start,
+                                                   QVariant()));
+
+    QInputMethodEvent event(QString(), attributes);
+    sendInputMethodEvent(&event);
+    return JNI_TRUE;
+}
+
+jboolean QAndroidInputContext::selectAll()
+{
+#warning TODO
+    return JNI_FALSE;
+}
+
+jboolean QAndroidInputContext::cut()
+{
+#warning TODO
+    return JNI_FALSE;
+}
+
+jboolean QAndroidInputContext::copy()
+{
+#warning TODO
+    return JNI_FALSE;
+}
+
+jboolean QAndroidInputContext::copyURL()
+{
+#warning TODO
+    return JNI_FALSE;
+}
+
+jboolean QAndroidInputContext::paste()
+{
+#warning TODO
+    return JNI_FALSE;
+}
+
+QSharedPointer<QInputMethodQueryEvent> QAndroidInputContext::focusObjectInputMethodQuery(Qt::InputMethodQueries queries)
+{
+#warning TODO make qGuiApp->focusObject() thread safe !!!
+    QObject *focusObject = qGuiApp->focusObject();
+    if (!focusObject)
+        return QSharedPointer<QInputMethodQueryEvent>();
+
+    QSharedPointer<QInputMethodQueryEvent> ret = QSharedPointer<QInputMethodQueryEvent>(new QInputMethodQueryEvent(queries));
+    if (qGuiApp->thread()==QThread::currentThread()) {
+        QCoreApplication::sendEvent(focusObject, ret.data());
+    } else {
+        QMetaObject::invokeMethod(this,
+                                  "sendEvent",
+                                  Qt::BlockingQueuedConnection,
+                                  Q_ARG(QObject*, focusObject),
+                                  Q_ARG(QInputMethodQueryEvent*, ret.data()));
+    }
+
+    return ret;
+}
+
+void QAndroidInputContext::sendInputMethodEvent(QInputMethodEvent *event)
+{
+#warning TODO make qGuiApp->focusObject() thread safe !!!
+    QObject *focusObject = qGuiApp->focusObject();
+    if (!focusObject)
+        return;
+
+    if (qGuiApp->thread() == QThread::currentThread()) {
+        QCoreApplication::sendEvent(focusObject, event);
+    } else {
+        QMetaObject::invokeMethod(this,
+                                  "sendEvent",
+                                  Qt::BlockingQueuedConnection,
+                                  Q_ARG(QObject*, focusObject),
+                                  Q_ARG(QInputMethodEvent*, event));
+    }
+}
+
+QT_END_NAMESPACE