Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 161 insertions, 0 deletions

diff --git a/Source/WebKit2/UIProcess/qt/QtTapGestureRecognizer.cpp b/Source/WebKit2/UIProcess/qt/QtTapGestureRecognizer.cpp
new file mode 100644
index 000000000..2ed773c11
--- /dev/null
+++ b/Source/WebKit2/UIProcess/qt/QtTapGestureRecognizer.cpp
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "config.h"
+#include "QtTapGestureRecognizer.h"
+
+#include "QtWebPageEventHandler.h"
+#include <QLineF>
+#include <QTouchEvent>
+
+namespace WebKit {
+
+QtTapGestureRecognizer::QtTapGestureRecognizer(QtWebPageEventHandler* eventHandler)
+    : QtGestureRecognizer(eventHandler)
+    , m_tapState(NoTap)
+{
+    reset();
+}
+
+bool QtTapGestureRecognizer::recognize(const QTouchEvent* event, qint64 eventTimestampMillis)
+{
+    if (event->touchPoints().size() != 1) {
+        reset();
+        return false;
+    }
+
+    switch (event->type()) {
+    case QEvent::TouchBegin:
+        ASSERT(m_tapState == NoTap);
+        ASSERT(!m_tapAndHoldTimer.isActive());
+
+        m_tapAndHoldTimer.start(tapAndHoldTime, this);
+
+        if (m_doubleTapTimer.isActive()) {
+            // Might be double tap.
+            ASSERT(m_touchBeginEventForTap);
+            m_doubleTapTimer.stop();
+            QPointF lastPosition = m_touchBeginEventForTap->touchPoints().first().screenPos();
+            QPointF newPosition = event->touchPoints().first().screenPos();
+            if (QLineF(lastPosition, newPosition).length() < maxDoubleTapDistance)
+                m_tapState = DoubleTapCandidate;
+            else {
+                // Received a new tap, that is unrelated to the previous one.
+                tapTimeout();
+                m_tapState = SingleTapStarted;
+            }
+        } else
+            m_tapState = SingleTapStarted;
+        m_touchBeginEventForTap = adoptPtr(new QTouchEvent(*event));
+        break;
+    case QEvent::TouchUpdate:
+        // If the touch point moves further than the threshold, we cancel the tap gesture.
+        if (m_tapState == SingleTapStarted) {
+            const QTouchEvent::TouchPoint& touchPoint = event->touchPoints().first();
+            QPointF offset(touchPoint.scenePos() - m_touchBeginEventForTap->touchPoints().first().scenePos());
+            const qreal distX = qAbs(offset.x());
+            const qreal distY = qAbs(offset.y());
+            if (distX > initialTriggerDistanceThreshold || distY > initialTriggerDistanceThreshold)
+                reset();
+        }
+        break;
+    case QEvent::TouchEnd:
+        m_tapAndHoldTimer.stop();
+
+        switch (m_tapState) {
+        case DoubleTapCandidate:
+            {
+                ASSERT(!m_doubleTapTimer.isActive());
+                m_tapState = NoTap;
+
+                const QTouchEvent::TouchPoint& touchPoint = event->touchPoints().first();
+                QPointF startPosition = touchPoint.startScreenPos();
+                QPointF endPosition = touchPoint.screenPos();
+                if (QLineF(endPosition, startPosition).length() < maxDoubleTapDistance && m_eventHandler)
+                    m_eventHandler->handleDoubleTapEvent(touchPoint);
+                break;
+            }
+        case SingleTapStarted:
+            ASSERT(!m_doubleTapTimer.isActive());
+            m_doubleTapTimer.start(doubleClickInterval, this);
+            m_tapState = NoTap;
+            break;
+        case TapAndHold:
+            m_tapState = NoTap;
+            break;
+        default:
+            break;
+        }
+        break;
+    default:
+        break;
+    }
+    return false;
+}
+
+void QtTapGestureRecognizer::tapTimeout()
+{
+    m_doubleTapTimer.stop();
+    m_eventHandler->handleSingleTapEvent(m_touchBeginEventForTap->touchPoints().at(0));
+    m_touchBeginEventForTap.clear();
+}
+
+void QtTapGestureRecognizer::tapAndHoldTimeout()
+{
+    ASSERT(m_touchBeginEventForTap);
+    m_tapAndHoldTimer.stop();
+#if 0 // No support for synthetic context menus in WK2 yet.
+    QTouchEvent::TouchPoint tapPoint = m_touchBeginEventForTap->touchPoints().at(0);
+    WebGestureEvent gesture(WebEvent::GestureTapAndHold, tapPoint.pos().toPoint(), tapPoint.screenPos().toPoint(), WebEvent::Modifiers(0), 0);
+    if (m_webPageProxy)
+        m_webPageProxy->handleGestureEvent(gesture);
+#endif
+    m_touchBeginEventForTap.clear();
+    m_tapState = TapAndHold;
+
+    ASSERT(!m_doubleTapTimer.isActive());
+    m_doubleTapTimer.stop();
+}
+
+void QtTapGestureRecognizer::reset()
+{
+    m_tapState = NoTap;
+    m_touchBeginEventForTap.clear();
+    m_tapAndHoldTimer.stop();
+
+    QtGestureRecognizer::reset();
+}
+
+void QtTapGestureRecognizer::timerEvent(QTimerEvent* ev)
+{
+    int timerId = ev->timerId();
+    if (timerId == m_doubleTapTimer.timerId())
+        tapTimeout();
+    else if (timerId == m_tapAndHoldTimer.timerId())
+        tapAndHoldTimeout();
+    else
+        QObject::timerEvent(ev);
+}
+
+} // namespace WebKit