michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "APZController.h"
michael@0: #include "base/message_loop.h"
michael@0: #include "mozilla/layers/GeckoContentController.h"
michael@0: #include "nsThreadUtils.h"
michael@0: #include "MetroUtils.h"
michael@0: #include "nsPrintfCString.h"
michael@0: #include "nsIWidgetListener.h"
michael@0: #include "mozilla/layers/APZCCallbackHelper.h"
michael@0: #include "nsIDocument.h"
michael@0: #include "nsPresContext.h"
michael@0: #include "nsIDOMElement.h"
michael@0: #include "mozilla/dom/Element.h"
michael@0: #include "nsIDOMWindowUtils.h"
michael@0: #include "nsIInterfaceRequestorUtils.h"
michael@0: #include "nsLayoutUtils.h"
michael@0: #include "mozilla/TouchEvents.h"
michael@0: 
michael@0: //#define DEBUG_CONTROLLER 1
michael@0: 
michael@0: #ifdef DEBUG_CONTROLLER
michael@0: #include "WinUtils.h"
michael@0: using namespace mozilla::widget;
michael@0: #endif
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace widget {
michael@0: namespace winrt {
michael@0: 
michael@0: nsRefPtr<mozilla::layers::APZCTreeManager> APZController::sAPZC;
michael@0: 
michael@0: /*
michael@0:  * Metro layout specific - test to see if a sub document is a
michael@0:  * tab.
michael@0:  */
michael@0: static bool
michael@0: IsTab(nsCOMPtr<nsIDocument>& aSubDocument)
michael@0: {
michael@0:   nsRefPtr<nsIDocument> parent = aSubDocument->GetParentDocument();
michael@0:   if (!parent) {
michael@0:     NS_WARNING("huh? IsTab should always get a sub document for a parameter");
michael@0:     return false;
michael@0:   }
michael@0:   return parent->IsRootDisplayDocument();
michael@0: }
michael@0: 
michael@0: /*
michael@0:  * Returns the sub document associated with the scroll id.
michael@0:  */
michael@0: static bool
michael@0: GetDOMTargets(uint64_t aScrollId,
michael@0:               nsCOMPtr<nsIDocument>& aSubDocument,
michael@0:               nsCOMPtr<nsIContent>& aTargetContent)
michael@0: {
michael@0:   // For tabs and subframes this will return the HTML sub document
michael@0:   aTargetContent = nsLayoutUtils::FindContentFor(aScrollId);
michael@0:   if (!aTargetContent) {
michael@0:     return false;
michael@0:   }
michael@0:   nsCOMPtr<mozilla::dom::Element> domElement = do_QueryInterface(aTargetContent);
michael@0:   if (!domElement) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   aSubDocument = domElement->OwnerDoc();
michael@0: 
michael@0:   if (!aSubDocument) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   // If the root element equals domElement, FindElementWithViewId found
michael@0:   // a document, vs. an element within a document.
michael@0:   if (aSubDocument->GetRootElement() == domElement && IsTab(aSubDocument)) {
michael@0:     aTargetContent = nullptr;
michael@0:   }
michael@0: 
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: class RequestContentRepaintEvent : public nsRunnable
michael@0: {
michael@0:   typedef mozilla::layers::FrameMetrics FrameMetrics;
michael@0: 
michael@0: public:
michael@0:   RequestContentRepaintEvent(const FrameMetrics& aFrameMetrics,
michael@0:                              nsIWidgetListener* aListener) :
michael@0:     mFrameMetrics(aFrameMetrics),
michael@0:     mWidgetListener(aListener)
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   NS_IMETHOD Run() {
michael@0:     // This must be on the gecko thread since we access the dom
michael@0:     MOZ_ASSERT(NS_IsMainThread());
michael@0: 
michael@0: #ifdef DEBUG_CONTROLLER
michael@0:     WinUtils::Log("APZController: mScrollOffset: %f %f", mFrameMetrics.mScrollOffset.x,
michael@0:       mFrameMetrics.mScrollOffset.y);
michael@0: #endif
michael@0: 
michael@0:     nsCOMPtr<nsIDocument> subDocument;
michael@0:     nsCOMPtr<nsIContent> targetContent;
michael@0:     if (!GetDOMTargets(mFrameMetrics.GetScrollId(),
michael@0:                        subDocument, targetContent)) {
michael@0:       return NS_OK;
michael@0:     }
michael@0: 
michael@0:     // If we're dealing with a sub frame or content editable element,
michael@0:     // call UpdateSubFrame.
michael@0:     if (targetContent) {
michael@0: #ifdef DEBUG_CONTROLLER
michael@0:       WinUtils::Log("APZController: detected subframe or content editable");
michael@0: #endif
michael@0:       mozilla::layers::APZCCallbackHelper::UpdateSubFrame(targetContent, mFrameMetrics);
michael@0:       return NS_OK;
michael@0:     }
michael@0: 
michael@0: #ifdef DEBUG_CONTROLLER
michael@0:     WinUtils::Log("APZController: detected tab");
michael@0: #endif
michael@0: 
michael@0:     // We're dealing with a tab, call UpdateRootFrame.
michael@0:     nsCOMPtr<nsIDOMWindowUtils> utils;
michael@0:     nsCOMPtr<nsIDOMWindow> window = subDocument->GetDefaultView();
michael@0:     if (window) {
michael@0:       utils = do_GetInterface(window);
michael@0:       if (utils) {
michael@0:         mozilla::layers::APZCCallbackHelper::UpdateRootFrame(utils, mFrameMetrics);
michael@0: 
michael@0: #ifdef DEBUG_CONTROLLER
michael@0:         WinUtils::Log("APZController: %I64d mDisplayPortMargins: %0.2f %0.2f %0.2f %0.2f",
michael@0:           mFrameMetrics.GetScrollId(),
michael@0:           mFrameMetrics.GetDisplayPortMargins().left,
michael@0:           mFrameMetrics.GetDisplayPortMargins().top,
michael@0:           mFrameMetrics.GetDisplayPortMargins().right,
michael@0:           mFrameMetrics.GetDisplayPortMargins().bottom);
michael@0: #endif
michael@0:       }
michael@0:     }
michael@0:     return NS_OK;
michael@0:   }
michael@0: protected:
michael@0:   FrameMetrics mFrameMetrics;
michael@0:   nsIWidgetListener* mWidgetListener;
michael@0: };
michael@0: 
michael@0: void
michael@0: APZController::SetWidgetListener(nsIWidgetListener* aWidgetListener)
michael@0: {
michael@0:   mWidgetListener = aWidgetListener;
michael@0: }
michael@0: 
michael@0: void
michael@0: APZController::ContentReceivedTouch(const ScrollableLayerGuid& aGuid, bool aPreventDefault)
michael@0: {
michael@0:   if (!sAPZC) {
michael@0:     return;
michael@0:   }
michael@0:   sAPZC->ContentReceivedTouch(aGuid, aPreventDefault);
michael@0: }
michael@0: 
michael@0: bool
michael@0: APZController::HitTestAPZC(ScreenIntPoint& aPoint)
michael@0: {
michael@0:   if (!sAPZC) {
michael@0:     return false;
michael@0:   }
michael@0:   return sAPZC->HitTestAPZC(aPoint);
michael@0: }
michael@0: 
michael@0: void
michael@0: APZController::TransformCoordinateToGecko(const ScreenIntPoint& aPoint,
michael@0:                                           LayoutDeviceIntPoint* aRefPointOut)
michael@0: {
michael@0:   if (!sAPZC || !aRefPointOut) {
michael@0:     return;
michael@0:   }
michael@0:   sAPZC->TransformCoordinateToGecko(aPoint, aRefPointOut);
michael@0: }
michael@0: 
michael@0: nsEventStatus
michael@0: APZController::ReceiveInputEvent(WidgetInputEvent* aEvent,
michael@0:                                  ScrollableLayerGuid* aOutTargetGuid)
michael@0: {
michael@0:   MOZ_ASSERT(aEvent);
michael@0: 
michael@0:   if (!sAPZC) {
michael@0:     return nsEventStatus_eIgnore;
michael@0:   }
michael@0:   return sAPZC->ReceiveInputEvent(*aEvent->AsInputEvent(), aOutTargetGuid);
michael@0: }
michael@0: 
michael@0: // APZC sends us this request when we need to update the display port on
michael@0: // the scrollable frame the apzc is managing.
michael@0: void
michael@0: APZController::RequestContentRepaint(const FrameMetrics& aFrameMetrics)
michael@0: {
michael@0:   if (!mWidgetListener) {
michael@0:     NS_WARNING("Can't update display port, !mWidgetListener");
michael@0:     return;
michael@0:   }
michael@0: 
michael@0: #ifdef DEBUG_CONTROLLER
michael@0:   WinUtils::Log("APZController::RequestContentRepaint scrollid=%I64d",
michael@0:     aFrameMetrics.GetScrollId());
michael@0: #endif
michael@0:   nsCOMPtr<nsIRunnable> r1 = new RequestContentRepaintEvent(aFrameMetrics,
michael@0:                                                             mWidgetListener);
michael@0:   if (!NS_IsMainThread()) {
michael@0:     NS_DispatchToMainThread(r1);
michael@0:   } else {
michael@0:     r1->Run();
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: APZController::AcknowledgeScrollUpdate(const FrameMetrics::ViewID& aScrollId,
michael@0:                                        const uint32_t& aScrollGeneration)
michael@0: {
michael@0: #ifdef DEBUG_CONTROLLER
michael@0:   WinUtils::Log("APZController::AcknowledgeScrollUpdate scrollid=%I64d gen=%lu",
michael@0:     aScrollId, aScrollGeneration);
michael@0: #endif
michael@0:   mozilla::layers::APZCCallbackHelper::AcknowledgeScrollUpdate(aScrollId, aScrollGeneration);
michael@0: }
michael@0: 
michael@0: void
michael@0: APZController::HandleDoubleTap(const CSSPoint& aPoint,
michael@0:                                int32_t aModifiers,
michael@0:                                const ScrollableLayerGuid& aGuid)
michael@0: {
michael@0: }
michael@0: 
michael@0: void
michael@0: APZController::HandleSingleTap(const CSSPoint& aPoint,
michael@0:                                int32_t aModifiers,
michael@0:                                const ScrollableLayerGuid& aGuid)
michael@0: {
michael@0: }
michael@0: 
michael@0: void
michael@0: APZController::HandleLongTap(const CSSPoint& aPoint,
michael@0:                              int32_t aModifiers,
michael@0:                              const ScrollableLayerGuid& aGuid)
michael@0: {
michael@0: }
michael@0: 
michael@0: void
michael@0: APZController::HandleLongTapUp(const CSSPoint& aPoint,
michael@0:                                int32_t aModifiers,
michael@0:                                const ScrollableLayerGuid& aGuid)
michael@0: {
michael@0: }
michael@0: 
michael@0: // requests that we send a mozbrowserasyncscroll domevent. not in use.
michael@0: void
michael@0: APZController::SendAsyncScrollDOMEvent(bool aIsRoot,
michael@0:                                        const CSSRect &aContentRect,
michael@0:                                        const CSSSize &aScrollableSize)
michael@0: {
michael@0: }
michael@0: 
michael@0: void
michael@0: APZController::PostDelayedTask(Task* aTask, int aDelayMs)
michael@0: {
michael@0:   MessageLoop::current()->PostDelayedTask(FROM_HERE, aTask, aDelayMs);
michael@0: }
michael@0: 
michael@0: bool
michael@0: APZController::GetRootZoomConstraints(ZoomConstraints* aOutConstraints)
michael@0: {
michael@0:   if (aOutConstraints) {
michael@0:     // Until we support the meta-viewport tag properly allow zooming
michael@0:     // from 1/4 to 4x by default.
michael@0:     aOutConstraints->mAllowZoom = true;
michael@0:     aOutConstraints->mAllowDoubleTapZoom = false;
michael@0:     aOutConstraints->mMinZoom = CSSToScreenScale(0.25f);
michael@0:     aOutConstraints->mMaxZoom = CSSToScreenScale(4.0f);
michael@0:     return true;
michael@0:   }
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: // apzc notifications
michael@0: 
michael@0: class TransformedStartEvent : public nsRunnable
michael@0: {
michael@0:   NS_IMETHOD Run() {
michael@0:     MetroUtils::FireObserver("apzc-transform-start", L"");
michael@0:     return NS_OK;
michael@0:   }
michael@0: };
michael@0: 
michael@0: class TransformedEndEvent : public nsRunnable
michael@0: {
michael@0:   NS_IMETHOD Run() {
michael@0:     MetroUtils::FireObserver("apzc-transform-end", L"");
michael@0:     return NS_OK;
michael@0:   }
michael@0: };
michael@0: 
michael@0: void
michael@0: APZController::NotifyAPZStateChange(const ScrollableLayerGuid& aGuid,
michael@0:                                     APZStateChange aChange,
michael@0:                                     int aArg)
michael@0: {
michael@0:   switch (aChange) {
michael@0:     case APZStateChange::TransformBegin:
michael@0:     {
michael@0:       if (NS_IsMainThread()) {
michael@0:         MetroUtils::FireObserver("apzc-transform-begin", L"");
michael@0:         return;
michael@0:       }
michael@0:       nsCOMPtr<nsIRunnable> runnable = new TransformedStartEvent();
michael@0:       NS_DispatchToMainThread(runnable);
michael@0:       break;
michael@0:     }
michael@0:     case APZStateChange::TransformEnd:
michael@0:     {
michael@0:       if (NS_IsMainThread()) {
michael@0:         MetroUtils::FireObserver("apzc-transform-end", L"");
michael@0:         return;
michael@0:       }
michael@0:       nsCOMPtr<nsIRunnable> runnable = new TransformedEndEvent();
michael@0:       NS_DispatchToMainThread(runnable);
michael@0:       break;
michael@0:     }
michael@0:     default:
michael@0:     {
michael@0:       // We don't currently care about other state changes.
michael@0:       break;
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: } } }