void MiniBrowser::didChangeViewportAttributes(WKViewRef view, WKViewportAttributesRef attributes, const void* clientInfo)
{
MiniBrowser* mb = static_cast<MiniBrowser*>(const_cast<void*>(clientInfo));
WKSize viewportSize = NIXViewportAttributesGetSize(attributes);
mb->m_viewportWidth = viewportSize.width;
mb->m_viewportHeight = viewportSize.height;
mb->m_viewportMinScale = NIXViewportAttributesGetMinimumScale(attributes);
mb->m_viewportMaxScale = NIXViewportAttributesGetMaximumScale(attributes);
mb->m_viewportInitScale = NIXViewportAttributesGetInitialScale(attributes);
mb->m_viewportUserScalable = NIXViewportAttributesGetIsUserScalable(attributes);
if (mb->m_viewportInitScale < 0) {
double scale = mb->scaleToFitContents();
if (scale < mb->m_viewportMinScale)
scale = mb->m_viewportMinScale;
else if (scale > mb->m_viewportMaxScale)
scale = mb->m_viewportMaxScale;
mb->m_viewportInitScale = scale;
}
if (!mb->m_viewportUserScalable)
mb->m_viewportMaxScale = mb->m_viewportMinScale = mb->m_viewportInitScale;
WKViewSetContentScaleFactor(mb->m_view, mb->m_viewportInitScale);
}
void MiniBrowser::didChangeViewportAttributes(NIXView, float width, float height, float minimumScale, float maximumScale, float initialScale, int userScalable, const void* clientInfo)
{
MiniBrowser* mb = static_cast<MiniBrowser*>(const_cast<void*>(clientInfo));
mb->m_viewportWidth = width;
mb->m_viewportHeight = height;
mb->m_viewportMinScale = minimumScale;
mb->m_viewportMaxScale = maximumScale;
mb->m_viewportInitScale = initialScale;
mb->m_viewportUserScalable = userScalable;
if (mb->m_viewportInitScale < 0) {
double scale = mb->scaleToFitContents();
if (scale < minimumScale)
scale = minimumScale;
else if (scale > maximumScale)
scale = maximumScale;
mb->m_viewportInitScale = scale;
}
if (!mb->m_viewportUserScalable)
mb->m_viewportMaxScale = mb->m_viewportMinScale = mb->m_viewportInitScale;
NIXViewSetScale(mb->m_view, mb->m_viewportInitScale);
}
void MiniBrowser::didFindZoomableArea(WKViewRef, WKPoint target, WKRect area, const void* clientInfo)
{
MiniBrowser* mb = static_cast<MiniBrowser*>(const_cast<void*>(clientInfo));
// Zoomable area width is the same as web page width, and this is fully visible.
if (mb->m_contentsSize.width == area.size.width && mb->m_contentsSize.width == NIXViewVisibleContentsSize(mb->m_view).width)
return;
// The zoomed area will look nicer with a horizontal margin.
double scale = WKViewGetSize(mb->m_view).width / (area.size.width + horizontalMarginForViewportAdjustment * 2.0);
// Trying to zoom to an area with the same scale factor causes a zoom out.
if (scale == WKViewGetContentScaleFactor(mb->m_view))
scale = mb->scaleToFitContents();
else {
// We want the zoomed content area to fit horizontally in the WebView,
// so let's give the scaleAtPoint method a suitable value.
target.x = area.origin.x - horizontalMarginForViewportAdjustment;
WKViewSetContentPosition(mb->m_view, WKPointMake(target.x, WKViewGetContentPosition(mb->m_view).y));
}
mb->scaleAtPoint(target, scale);
}
