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-rw-r--r--layout/xul/nsScrollBoxFrame.cpp178
1 files changed, 178 insertions, 0 deletions
diff --git a/layout/xul/nsScrollBoxFrame.cpp b/layout/xul/nsScrollBoxFrame.cpp
new file mode 100644
index 000000000..4a6c9c2a8
--- /dev/null
+++ b/layout/xul/nsScrollBoxFrame.cpp
@@ -0,0 +1,178 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsCOMPtr.h"
+#include "nsPresContext.h"
+#include "nsGkAtoms.h"
+#include "nsButtonBoxFrame.h"
+#include "nsITimer.h"
+#include "nsRepeatService.h"
+#include "mozilla/MouseEvents.h"
+#include "nsIContent.h"
+
+using namespace mozilla;
+
+class nsAutoRepeatBoxFrame : public nsButtonBoxFrame
+{
+public:
+ NS_DECL_FRAMEARENA_HELPERS
+
+ friend nsIFrame* NS_NewAutoRepeatBoxFrame(nsIPresShell* aPresShell,
+ nsStyleContext* aContext);
+
+ virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
+
+ virtual nsresult AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType) override;
+
+ virtual nsresult HandleEvent(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus) override;
+
+ NS_IMETHOD HandlePress(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus) override;
+
+ NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus) override;
+
+protected:
+ explicit nsAutoRepeatBoxFrame(nsStyleContext* aContext):
+ nsButtonBoxFrame(aContext) {}
+
+ void StartRepeat() {
+ if (IsActivatedOnHover()) {
+ // No initial delay on hover.
+ nsRepeatService::GetInstance()->Start(Notify, this, 0);
+ } else {
+ nsRepeatService::GetInstance()->Start(Notify, this);
+ }
+ }
+ void StopRepeat() {
+ nsRepeatService::GetInstance()->Stop(Notify, this);
+ }
+ void Notify();
+ static void Notify(void* aData) {
+ static_cast<nsAutoRepeatBoxFrame*>(aData)->Notify();
+ }
+
+ bool mTrustedEvent;
+
+ bool IsActivatedOnHover();
+};
+
+nsIFrame*
+NS_NewAutoRepeatBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+ return new (aPresShell) nsAutoRepeatBoxFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsAutoRepeatBoxFrame)
+
+nsresult
+nsAutoRepeatBoxFrame::HandleEvent(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus)
+{
+ NS_ENSURE_ARG_POINTER(aEventStatus);
+ if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
+ return NS_OK;
+ }
+
+ switch(aEvent->mMessage) {
+ // repeat mode may be "hover" for repeating while the mouse is hovering
+ // over the element, otherwise repetition is done while the element is
+ // active (pressed).
+ case eMouseEnterIntoWidget:
+ case eMouseOver:
+ if (IsActivatedOnHover()) {
+ StartRepeat();
+ mTrustedEvent = aEvent->IsTrusted();
+ }
+ break;
+
+ case eMouseExitFromWidget:
+ case eMouseOut:
+ // always stop on mouse exit
+ StopRepeat();
+ // Not really necessary but do this to be safe
+ mTrustedEvent = false;
+ break;
+
+ case eMouseClick: {
+ WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
+ if (mouseEvent->IsLeftClickEvent()) {
+ // skip button frame handling to prevent click handling
+ return nsBoxFrame::HandleEvent(aPresContext, mouseEvent, aEventStatus);
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ return nsButtonBoxFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
+}
+
+NS_IMETHODIMP
+nsAutoRepeatBoxFrame::HandlePress(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus)
+{
+ if (!IsActivatedOnHover()) {
+ StartRepeat();
+ mTrustedEvent = aEvent->IsTrusted();
+ DoMouseClick(aEvent, mTrustedEvent);
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsAutoRepeatBoxFrame::HandleRelease(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus)
+{
+ if (!IsActivatedOnHover()) {
+ StopRepeat();
+ }
+ return NS_OK;
+}
+
+nsresult
+nsAutoRepeatBoxFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType)
+{
+ if (aAttribute == nsGkAtoms::type) {
+ StopRepeat();
+ }
+ return NS_OK;
+}
+
+void
+nsAutoRepeatBoxFrame::Notify()
+{
+ DoMouseClick(nullptr, mTrustedEvent);
+}
+
+void
+nsAutoRepeatBoxFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+ // Ensure our repeat service isn't going... it's possible that a scrollbar can disappear out
+ // from under you while you're in the process of scrolling.
+ StopRepeat();
+ nsButtonBoxFrame::DestroyFrom(aDestructRoot);
+}
+
+bool
+nsAutoRepeatBoxFrame::IsActivatedOnHover()
+{
+ return mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::repeat,
+ nsGkAtoms::hover, eCaseMatters);
+}