void PageViewportControllerClientQt::focusEditableArea(const QRectF& caretArea, const QRectF& targetArea)
{
// This can only happen as a result of a user interaction.
ASSERT(m_controller->hadUserInteraction());
const float editingFixedScale = 2;
float targetScale = m_controller->innerBoundedViewportScale(editingFixedScale);
const QRectF viewportRect = m_viewportItem->boundingRect();
qreal x;
const qreal borderOffset = 10;
if ((targetArea.width() + borderOffset) * targetScale <= viewportRect.width()) {
// Center the input field in the middle of the view, if it is smaller than
// the view at the scale target.
x = viewportRect.center().x() - targetArea.width() * targetScale / 2.0;
} else {
// Ensure that the caret always has borderOffset contents pixels to the right
// of it, and secondarily (if possible), that the area has borderOffset
// contents pixels to the left of it.
qreal caretOffset = caretArea.x() - targetArea.x();
x = qMin(viewportRect.width() - (caretOffset + borderOffset) * targetScale, borderOffset * targetScale);
}
const QPointF hotspot = QPointF(targetArea.x(), targetArea.center().y());
const QPointF viewportHotspot = QPointF(x, /* FIXME: visibleCenter */ viewportRect.center().y());
QPointF endPosition = hotspot - viewportHotspot / targetScale;
endPosition = m_controller->boundContentsPositionAtScale(endPosition, targetScale);
QRectF endVisibleContentRect(endPosition, viewportRect.size() / targetScale);
animateContentRectVisible(endVisibleContentRect);
}
void PageViewportControllerClientQt::pinchGestureEnded()
{
if (m_pinchStartScale < 0)
return;
ASSERT(m_scaleChange.inProgress());
m_pinchStartScale = -1;
// This will take care of resuming the content, even if no animation was performed.
animateContentRectVisible(nearestValidVisibleContentsRect());
}
void PageViewportControllerClientQt::pinchGestureEnded()
{
ASSERT(m_controller->hasSuspendedContent());
if (!m_controller->allowsUserScaling())
return;
m_pinchStartScale = -1;
// This will take care of resuming the content, even if no animation was performed.
animateContentRectVisible(nearestValidVisibleContentsRect());
}
void PageViewportControllerClientQt::zoomToAreaGestureEnded(const QPointF& touchPoint, const QRectF& targetArea)
{
// This can only happen as a result of a user interaction.
ASSERT(m_controller->hadUserInteraction());
if (!targetArea.isValid())
return;
if (m_controller->hasSuspendedContent())
return;
const float margin = 10; // We want at least a little bit of margin.
QRectF endArea = targetArea.adjusted(-margin, -margin, margin, margin);
const QRectF viewportRect = m_viewportItem->boundingRect();
const qreal minViewportScale = qreal(2.5);
qreal targetScale = viewportRect.size().width() / endArea.size().width();
targetScale = m_controller->innerBoundedViewportScale(qMin(minViewportScale, targetScale));
qreal currentScale = m_pageItem->contentsScale();
// We want to end up with the target area filling the whole width of the viewport (if possible),
// and centralized vertically where the user requested zoom. Thus our hotspot is the center of
// the targetArea x-wise and the requested zoom position, y-wise.
const QPointF hotspot = QPointF(endArea.center().x(), touchPoint.y());
const QPointF viewportHotspot = viewportRect.center();
QPointF endPosition = hotspot - viewportHotspot / targetScale;
endPosition = m_controller->boundContentsPositionAtScale(endPosition, targetScale);
QRectF endVisibleContentRect(endPosition, viewportRect.size() / targetScale);
enum { ZoomIn, ZoomBack, ZoomOut, NoZoom } zoomAction = ZoomIn;
// Zoom back out if attempting to scale to the same current scale, or
// attempting to continue scaling out from the inner most level.
// Use fuzzy compare with a fixed error to be able to deal with largish differences due to pixel rounding.
if (!m_scaleStack.isEmpty() && fuzzyCompare(targetScale, currentScale, 0.01)) {
// If moving the viewport would expose more of the targetRect and move at least 40 pixels, update position but do not scale out.
QRectF currentContentRect(m_viewportItem->mapRectToWebContent(viewportRect));
QRectF targetIntersection = endVisibleContentRect.intersected(targetArea);
if (!currentContentRect.contains(targetIntersection)
&& (qAbs(endVisibleContentRect.top() - currentContentRect.top()) >= 40
|| qAbs(endVisibleContentRect.left() - currentContentRect.left()) >= 40))
zoomAction = NoZoom;
else
zoomAction = ZoomBack;
} else if (fuzzyCompare(targetScale, m_zoomOutScale, 0.01))
zoomAction = ZoomBack;
else if (targetScale < currentScale)
zoomAction = ZoomOut;
switch (zoomAction) {
case ZoomIn:
m_scaleStack.append(ScaleStackItem(currentScale, m_viewportItem->contentPos().x() / currentScale));
m_zoomOutScale = targetScale;
break;
case ZoomBack: {
if (m_scaleStack.isEmpty()) {
targetScale = m_controller->minimumScale();
endPosition.setY(hotspot.y() - viewportHotspot.y() / targetScale);
endPosition.setX(0);
m_zoomOutScale = 0;
} else {
ScaleStackItem lastScale = m_scaleStack.takeLast();
targetScale = lastScale.scale;
// Recalculate endPosition and clamp it according to the new scale.
endPosition.setY(hotspot.y() - viewportHotspot.y() / targetScale);
endPosition.setX(lastScale.xPosition);
}
endPosition = m_controller->boundContentsPositionAtScale(endPosition, targetScale);
endVisibleContentRect = QRectF(endPosition, viewportRect.size() / targetScale);
break;
}
case ZoomOut:
// Unstack all scale-levels deeper than the new level, so a zoom-back won't end up zooming in.
while (!m_scaleStack.isEmpty() && m_scaleStack.last().scale >= targetScale)
m_scaleStack.removeLast();
m_zoomOutScale = targetScale;
break;
case NoZoom:
break;
}
animateContentRectVisible(endVisibleContentRect);
}