forked from mirrors/gecko-dev
d57d4905f1
# ignore-this-changeset Differential Revision: https://phabricator.services.mozilla.com/D30883 --HG-- extra : moz-landing-system : lando
517 lines
18 KiB
C++
517 lines
18 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "APZEventState.h"
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#include "ActiveElementManager.h"
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#include "APZCCallbackHelper.h"
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#include "gfxPrefs.h"
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#include "LayersLogging.h"
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#include "mozilla/BasicEvents.h"
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#include "mozilla/dom/MouseEventBinding.h"
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#include "mozilla/dom/BrowserChild.h"
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#include "mozilla/dom/TabGroup.h"
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#include "mozilla/IntegerPrintfMacros.h"
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#include "mozilla/Move.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/TouchEvents.h"
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#include "mozilla/layers/APZCCallbackHelper.h"
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#include "nsCOMPtr.h"
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#include "nsDocShell.h"
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#include "nsIDOMWindowUtils.h"
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#include "nsINamed.h"
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#include "nsIScrollableFrame.h"
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#include "nsIScrollbarMediator.h"
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#include "nsITimer.h"
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#include "nsIWeakReferenceUtils.h"
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#include "nsIWidget.h"
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#include "nsLayoutUtils.h"
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#include "nsQueryFrame.h"
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#include "TouchManager.h"
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#include "nsLayoutUtils.h"
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#include "nsIScrollableFrame.h"
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#include "nsIScrollbarMediator.h"
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#include "mozilla/TouchEvents.h"
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#include "mozilla/widget/nsAutoRollup.h"
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#define APZES_LOG(...)
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// #define APZES_LOG(...) printf_stderr("APZES: " __VA_ARGS__)
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// Static helper functions
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namespace {
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int32_t WidgetModifiersToDOMModifiers(mozilla::Modifiers aModifiers) {
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int32_t result = 0;
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if (aModifiers & mozilla::MODIFIER_SHIFT) {
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result |= nsIDOMWindowUtils::MODIFIER_SHIFT;
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}
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if (aModifiers & mozilla::MODIFIER_CONTROL) {
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result |= nsIDOMWindowUtils::MODIFIER_CONTROL;
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}
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if (aModifiers & mozilla::MODIFIER_ALT) {
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result |= nsIDOMWindowUtils::MODIFIER_ALT;
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}
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if (aModifiers & mozilla::MODIFIER_META) {
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result |= nsIDOMWindowUtils::MODIFIER_META;
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}
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if (aModifiers & mozilla::MODIFIER_ALTGRAPH) {
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result |= nsIDOMWindowUtils::MODIFIER_ALTGRAPH;
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}
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if (aModifiers & mozilla::MODIFIER_CAPSLOCK) {
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result |= nsIDOMWindowUtils::MODIFIER_CAPSLOCK;
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}
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if (aModifiers & mozilla::MODIFIER_FN) {
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result |= nsIDOMWindowUtils::MODIFIER_FN;
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}
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if (aModifiers & mozilla::MODIFIER_FNLOCK) {
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result |= nsIDOMWindowUtils::MODIFIER_FNLOCK;
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}
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if (aModifiers & mozilla::MODIFIER_NUMLOCK) {
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result |= nsIDOMWindowUtils::MODIFIER_NUMLOCK;
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}
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if (aModifiers & mozilla::MODIFIER_SCROLLLOCK) {
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result |= nsIDOMWindowUtils::MODIFIER_SCROLLLOCK;
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}
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if (aModifiers & mozilla::MODIFIER_SYMBOL) {
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result |= nsIDOMWindowUtils::MODIFIER_SYMBOL;
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}
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if (aModifiers & mozilla::MODIFIER_SYMBOLLOCK) {
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result |= nsIDOMWindowUtils::MODIFIER_SYMBOLLOCK;
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}
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if (aModifiers & mozilla::MODIFIER_OS) {
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result |= nsIDOMWindowUtils::MODIFIER_OS;
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}
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return result;
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}
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} // namespace
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namespace mozilla {
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namespace layers {
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static int32_t sActiveDurationMs = 10;
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static bool sActiveDurationMsSet = false;
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APZEventState::APZEventState(nsIWidget* aWidget,
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ContentReceivedInputBlockCallback&& aCallback)
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: mWidget(nullptr) // initialized in constructor body
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,
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mActiveElementManager(new ActiveElementManager()),
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mContentReceivedInputBlockCallback(std::move(aCallback)),
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mPendingTouchPreventedResponse(false),
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mPendingTouchPreventedBlockId(0),
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mEndTouchIsClick(false),
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mFirstTouchCancelled(false),
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mTouchEndCancelled(false),
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mLastTouchIdentifier(0) {
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nsresult rv;
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mWidget = do_GetWeakReference(aWidget, &rv);
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MOZ_ASSERT(NS_SUCCEEDED(rv),
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"APZEventState constructed with a widget that"
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" does not support weak references. APZ will NOT work!");
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if (!sActiveDurationMsSet) {
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Preferences::AddIntVarCache(&sActiveDurationMs,
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"ui.touch_activation.duration_ms",
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sActiveDurationMs);
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sActiveDurationMsSet = true;
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}
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}
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APZEventState::~APZEventState() {}
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class DelayedFireSingleTapEvent final : public nsITimerCallback,
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public nsINamed {
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public:
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NS_DECL_ISUPPORTS
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DelayedFireSingleTapEvent(nsWeakPtr aWidget, LayoutDevicePoint& aPoint,
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Modifiers aModifiers, int32_t aClickCount,
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nsITimer* aTimer, RefPtr<nsIContent>& aTouchRollup)
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: mWidget(aWidget),
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mPoint(aPoint),
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mModifiers(aModifiers),
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mClickCount(aClickCount)
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// Hold the reference count until we are called back.
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,
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mTimer(aTimer),
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mTouchRollup(aTouchRollup) {}
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NS_IMETHOD Notify(nsITimer*) override {
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if (nsCOMPtr<nsIWidget> widget = do_QueryReferent(mWidget)) {
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widget::nsAutoRollup rollup(mTouchRollup.get());
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APZCCallbackHelper::FireSingleTapEvent(mPoint, mModifiers, mClickCount,
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widget);
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}
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mTimer = nullptr;
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return NS_OK;
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}
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NS_IMETHOD
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GetName(nsACString& aName) override {
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aName.AssignLiteral("DelayedFireSingleTapEvent");
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return NS_OK;
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}
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void ClearTimer() { mTimer = nullptr; }
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private:
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~DelayedFireSingleTapEvent() {}
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nsWeakPtr mWidget;
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LayoutDevicePoint mPoint;
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Modifiers mModifiers;
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int32_t mClickCount;
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nsCOMPtr<nsITimer> mTimer;
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RefPtr<nsIContent> mTouchRollup;
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};
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NS_IMPL_ISUPPORTS(DelayedFireSingleTapEvent, nsITimerCallback, nsINamed)
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void APZEventState::ProcessSingleTap(const CSSPoint& aPoint,
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const CSSToLayoutDeviceScale& aScale,
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Modifiers aModifiers,
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int32_t aClickCount) {
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APZES_LOG("Handling single tap at %s with %d\n", Stringify(aPoint).c_str(),
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mTouchEndCancelled);
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RefPtr<nsIContent> touchRollup = GetTouchRollup();
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mTouchRollup = nullptr;
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nsCOMPtr<nsIWidget> widget = GetWidget();
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if (!widget) {
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return;
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}
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if (mTouchEndCancelled) {
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return;
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}
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LayoutDevicePoint ldPoint = aPoint * aScale;
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APZES_LOG("Scheduling timer for click event\n");
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nsCOMPtr<nsITimer> timer = NS_NewTimer();
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dom::BrowserChild* browserChild = widget->GetOwningBrowserChild();
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if (browserChild && XRE_IsContentProcess()) {
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timer->SetTarget(
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browserChild->TabGroup()->EventTargetFor(TaskCategory::Other));
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}
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RefPtr<DelayedFireSingleTapEvent> callback = new DelayedFireSingleTapEvent(
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mWidget, ldPoint, aModifiers, aClickCount, timer, touchRollup);
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nsresult rv = timer->InitWithCallback(callback, sActiveDurationMs,
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nsITimer::TYPE_ONE_SHOT);
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if (NS_FAILED(rv)) {
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// Make |callback| not hold the timer, so they will both be destructed when
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// we leave the scope of this function.
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callback->ClearTimer();
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}
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}
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bool APZEventState::FireContextmenuEvents(PresShell* aPresShell,
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const CSSPoint& aPoint,
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const CSSToLayoutDeviceScale& aScale,
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Modifiers aModifiers,
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const nsCOMPtr<nsIWidget>& aWidget) {
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// Synthesize mousemove event for allowing users to emulate to move mouse
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// cursor over the element. As a result, users can open submenu UI which
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// is opened when mouse cursor is moved over a link (i.e., it's a case that
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// users cannot stay in the page after tapping it). So, this improves
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// accessibility in websites which are designed for desktop.
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// Note that we don't need to check whether mousemove event is consumed or
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// not because Chrome also ignores the result.
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APZCCallbackHelper::DispatchSynthesizedMouseEvent(
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eMouseMove, 0 /* time */, aPoint * aScale, aModifiers, 0 /* clickCount */,
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aWidget);
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// Converting the modifiers to DOM format for the DispatchMouseEvent call
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// is the most useless thing ever because nsDOMWindowUtils::SendMouseEvent
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// just converts them back to widget format, but that API has many callers,
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// including in JS code, so it's not trivial to change.
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bool eventHandled = APZCCallbackHelper::DispatchMouseEvent(
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aPresShell, NS_LITERAL_STRING("contextmenu"), aPoint, 2, 1,
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WidgetModifiersToDOMModifiers(aModifiers), true,
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dom::MouseEvent_Binding::MOZ_SOURCE_TOUCH,
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0 /* Use the default value here. */);
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APZES_LOG("Contextmenu event handled: %d\n", eventHandled);
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if (eventHandled) {
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// If the contextmenu event was handled then we're showing a contextmenu,
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// and so we should remove any activation
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mActiveElementManager->ClearActivation();
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#ifndef XP_WIN
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} else {
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// If the contextmenu wasn't consumed, fire the eMouseLongTap event.
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nsEventStatus status = APZCCallbackHelper::DispatchSynthesizedMouseEvent(
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eMouseLongTap, /*time*/ 0, aPoint * aScale, aModifiers,
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/*clickCount*/ 1, aWidget);
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eventHandled = (status == nsEventStatus_eConsumeNoDefault);
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APZES_LOG("eMouseLongTap event handled: %d\n", eventHandled);
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#endif
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}
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return eventHandled;
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}
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void APZEventState::ProcessLongTap(PresShell* aPresShell,
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const CSSPoint& aPoint,
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const CSSToLayoutDeviceScale& aScale,
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Modifiers aModifiers,
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uint64_t aInputBlockId) {
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APZES_LOG("Handling long tap at %s\n", Stringify(aPoint).c_str());
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nsCOMPtr<nsIWidget> widget = GetWidget();
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if (!widget) {
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return;
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}
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SendPendingTouchPreventedResponse(false);
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#ifdef XP_WIN
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// On Windows, we fire the contextmenu events when the user lifts their
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// finger, in keeping with the platform convention. This happens in the
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// ProcessLongTapUp function. However, we still fire the eMouseLongTap event
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// at this time, because things like text selection or dragging may want
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// to know about it.
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nsEventStatus status = APZCCallbackHelper::DispatchSynthesizedMouseEvent(
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eMouseLongTap, /*time*/ 0, aPoint * aScale, aModifiers, /*clickCount*/ 1,
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widget);
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bool eventHandled = (status == nsEventStatus_eConsumeNoDefault);
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#else
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bool eventHandled =
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FireContextmenuEvents(aPresShell, aPoint, aScale, aModifiers, widget);
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#endif
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mContentReceivedInputBlockCallback(aInputBlockId, eventHandled);
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if (eventHandled) {
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// Also send a touchcancel to content, so that listeners that might be
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// waiting for a touchend don't trigger.
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WidgetTouchEvent cancelTouchEvent(true, eTouchCancel, widget.get());
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cancelTouchEvent.mModifiers = aModifiers;
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auto ldPoint = LayoutDeviceIntPoint::Round(aPoint * aScale);
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cancelTouchEvent.mTouches.AppendElement(new mozilla::dom::Touch(
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mLastTouchIdentifier, ldPoint, LayoutDeviceIntPoint(), 0, 0));
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APZCCallbackHelper::DispatchWidgetEvent(cancelTouchEvent);
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}
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}
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void APZEventState::ProcessLongTapUp(PresShell* aPresShell,
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const CSSPoint& aPoint,
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const CSSToLayoutDeviceScale& aScale,
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Modifiers aModifiers) {
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#ifdef XP_WIN
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nsCOMPtr<nsIWidget> widget = GetWidget();
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if (widget) {
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FireContextmenuEvents(aPresShell, aPoint, aScale, aModifiers, widget);
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}
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#endif
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}
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void APZEventState::ProcessTouchEvent(const WidgetTouchEvent& aEvent,
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const ScrollableLayerGuid& aGuid,
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uint64_t aInputBlockId,
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nsEventStatus aApzResponse,
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nsEventStatus aContentResponse) {
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if (aEvent.mMessage == eTouchStart && aEvent.mTouches.Length() > 0) {
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mActiveElementManager->SetTargetElement(aEvent.mTouches[0]->GetTarget());
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mLastTouchIdentifier = aEvent.mTouches[0]->Identifier();
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}
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bool isTouchPrevented = aContentResponse == nsEventStatus_eConsumeNoDefault;
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bool sentContentResponse = false;
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APZES_LOG("Handling event type %d\n", aEvent.mMessage);
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switch (aEvent.mMessage) {
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case eTouchStart: {
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mTouchEndCancelled = false;
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mTouchRollup = do_GetWeakReference(widget::nsAutoRollup::GetLastRollup());
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sentContentResponse = SendPendingTouchPreventedResponse(false);
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// sentContentResponse can be true here if we get two TOUCH_STARTs in a
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// row and just responded to the first one.
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// We're about to send a response back to APZ, but we should only do it
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// for events that went through APZ (which should be all of them).
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MOZ_ASSERT(aEvent.mFlags.mHandledByAPZ);
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// If the first touchstart event was preventDefaulted, ensure that any
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// subsequent additional touchstart events also get preventDefaulted. This
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// ensures that e.g. pinch zooming is prevented even if just the first
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// touchstart was prevented by content.
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if (mTouchCounter.GetActiveTouchCount() == 0) {
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mFirstTouchCancelled = isTouchPrevented;
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} else {
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if (mFirstTouchCancelled && !isTouchPrevented) {
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APZES_LOG(
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"Propagating prevent-default from first-touch for block %" PRIu64
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"\n",
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aInputBlockId);
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}
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isTouchPrevented |= mFirstTouchCancelled;
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}
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if (isTouchPrevented) {
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mContentReceivedInputBlockCallback(aInputBlockId, isTouchPrevented);
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sentContentResponse = true;
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} else {
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APZES_LOG("Event not prevented; pending response for %" PRIu64 " %s\n",
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aInputBlockId, Stringify(aGuid).c_str());
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mPendingTouchPreventedResponse = true;
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mPendingTouchPreventedGuid = aGuid;
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mPendingTouchPreventedBlockId = aInputBlockId;
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}
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break;
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}
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case eTouchEnd:
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if (isTouchPrevented) {
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mTouchEndCancelled = true;
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mEndTouchIsClick = false;
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}
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MOZ_FALLTHROUGH;
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case eTouchCancel:
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mActiveElementManager->HandleTouchEndEvent(mEndTouchIsClick);
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MOZ_FALLTHROUGH;
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case eTouchMove: {
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if (mPendingTouchPreventedResponse) {
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MOZ_ASSERT(aGuid == mPendingTouchPreventedGuid);
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}
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sentContentResponse = SendPendingTouchPreventedResponse(isTouchPrevented);
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break;
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}
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default:
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MOZ_ASSERT_UNREACHABLE("Unknown touch event type");
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break;
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}
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mTouchCounter.Update(aEvent);
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if (mTouchCounter.GetActiveTouchCount() == 0) {
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mFirstTouchCancelled = false;
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}
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if (sentContentResponse && !isTouchPrevented &&
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aApzResponse == nsEventStatus_eConsumeDoDefault &&
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gfxPrefs::PointerEventsEnabled()) {
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WidgetTouchEvent cancelEvent(aEvent);
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cancelEvent.mMessage = eTouchPointerCancel;
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cancelEvent.mFlags.mCancelable = false; // mMessage != eTouchCancel;
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for (uint32_t i = 0; i < cancelEvent.mTouches.Length(); ++i) {
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if (mozilla::dom::Touch* touch = cancelEvent.mTouches[i]) {
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touch->convertToPointer = true;
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}
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}
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nsEventStatus status;
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cancelEvent.mWidget->DispatchEvent(&cancelEvent, status);
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}
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}
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void APZEventState::ProcessWheelEvent(const WidgetWheelEvent& aEvent,
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uint64_t aInputBlockId) {
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// If this event starts a swipe, indicate that it shouldn't result in a
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// scroll by setting defaultPrevented to true.
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bool defaultPrevented = aEvent.DefaultPrevented() || aEvent.TriggersSwipe();
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mContentReceivedInputBlockCallback(aInputBlockId, defaultPrevented);
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}
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void APZEventState::ProcessMouseEvent(const WidgetMouseEvent& aEvent,
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uint64_t aInputBlockId) {
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bool defaultPrevented = false;
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mContentReceivedInputBlockCallback(aInputBlockId, defaultPrevented);
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}
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void APZEventState::ProcessAPZStateChange(ViewID aViewId,
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APZStateChange aChange, int aArg) {
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switch (aChange) {
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case APZStateChange::eTransformBegin: {
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nsIScrollableFrame* sf = nsLayoutUtils::FindScrollableFrameFor(aViewId);
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if (sf) {
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sf->SetTransformingByAPZ(true);
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}
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nsIScrollbarMediator* scrollbarMediator = do_QueryFrame(sf);
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if (scrollbarMediator) {
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scrollbarMediator->ScrollbarActivityStarted();
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}
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nsIContent* content = nsLayoutUtils::FindContentFor(aViewId);
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dom::Document* doc = content ? content->GetComposedDoc() : nullptr;
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nsCOMPtr<nsIDocShell> docshell(doc ? doc->GetDocShell() : nullptr);
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if (docshell && sf) {
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nsDocShell* nsdocshell = static_cast<nsDocShell*>(docshell.get());
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nsdocshell->NotifyAsyncPanZoomStarted();
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}
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break;
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}
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case APZStateChange::eTransformEnd: {
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nsIScrollableFrame* sf = nsLayoutUtils::FindScrollableFrameFor(aViewId);
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if (sf) {
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sf->SetTransformingByAPZ(false);
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}
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nsIScrollbarMediator* scrollbarMediator = do_QueryFrame(sf);
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if (scrollbarMediator) {
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scrollbarMediator->ScrollbarActivityStopped();
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}
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nsIContent* content = nsLayoutUtils::FindContentFor(aViewId);
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dom::Document* doc = content ? content->GetComposedDoc() : nullptr;
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nsCOMPtr<nsIDocShell> docshell(doc ? doc->GetDocShell() : nullptr);
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if (docshell && sf) {
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nsDocShell* nsdocshell = static_cast<nsDocShell*>(docshell.get());
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nsdocshell->NotifyAsyncPanZoomStopped();
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}
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break;
|
|
}
|
|
case APZStateChange::eStartTouch: {
|
|
mActiveElementManager->HandleTouchStart(aArg);
|
|
break;
|
|
}
|
|
case APZStateChange::eStartPanning: {
|
|
// The user started to pan, so we don't want anything to be :active.
|
|
mActiveElementManager->ClearActivation();
|
|
break;
|
|
}
|
|
case APZStateChange::eEndTouch: {
|
|
mEndTouchIsClick = aArg;
|
|
mActiveElementManager->HandleTouchEnd();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void APZEventState::ProcessClusterHit() {
|
|
// If we hit a cluster of links then we shouldn't activate any of them,
|
|
// as we will be showing the zoomed view. (This is only called on Fennec).
|
|
#ifndef MOZ_WIDGET_ANDROID
|
|
MOZ_ASSERT(false);
|
|
#endif
|
|
mActiveElementManager->ClearActivation();
|
|
}
|
|
|
|
bool APZEventState::SendPendingTouchPreventedResponse(bool aPreventDefault) {
|
|
if (mPendingTouchPreventedResponse) {
|
|
APZES_LOG("Sending response %d for pending guid: %s\n", aPreventDefault,
|
|
Stringify(mPendingTouchPreventedGuid).c_str());
|
|
mContentReceivedInputBlockCallback(mPendingTouchPreventedBlockId,
|
|
aPreventDefault);
|
|
mPendingTouchPreventedResponse = false;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
already_AddRefed<nsIWidget> APZEventState::GetWidget() const {
|
|
nsCOMPtr<nsIWidget> result = do_QueryReferent(mWidget);
|
|
return result.forget();
|
|
}
|
|
|
|
already_AddRefed<nsIContent> APZEventState::GetTouchRollup() const {
|
|
nsCOMPtr<nsIContent> result = do_QueryReferent(mTouchRollup);
|
|
return result.forget();
|
|
}
|
|
|
|
} // namespace layers
|
|
} // namespace mozilla
|