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Diffstat (limited to 'widget/nsBaseWidget.cpp')
| -rw-r--r-- | widget/nsBaseWidget.cpp | 3444 |
1 files changed, 3444 insertions, 0 deletions
diff --git a/widget/nsBaseWidget.cpp b/widget/nsBaseWidget.cpp new file mode 100644 index 0000000000..fcf4467a06 --- /dev/null +++ b/widget/nsBaseWidget.cpp @@ -0,0 +1,3444 @@ + +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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 "nsBaseWidget.h" + +#include <utility> + +#include "GLConsts.h" +#include "InputData.h" +#include "LiveResizeListener.h" +#include "SwipeTracker.h" +#include "TouchEvents.h" +#include "X11UndefineNone.h" +#include "base/thread.h" +#include "mozilla/ArrayUtils.h" +#include "mozilla/Attributes.h" +#include "mozilla/GlobalKeyListener.h" +#include "mozilla/IMEStateManager.h" +#include "mozilla/Logging.h" +#include "mozilla/MouseEvents.h" +#include "mozilla/NativeKeyBindingsType.h" +#include "mozilla/Preferences.h" +#include "mozilla/PresShell.h" +#include "mozilla/ScopeExit.h" +#include "mozilla/Sprintf.h" +#include "mozilla/StaticPrefs_apz.h" +#include "mozilla/StaticPrefs_dom.h" +#include "mozilla/StaticPrefs_gfx.h" +#include "mozilla/StaticPrefs_layers.h" +#include "mozilla/StaticPrefs_layout.h" +#include "mozilla/TextEventDispatcher.h" +#include "mozilla/TextEventDispatcherListener.h" +#include "mozilla/UniquePtr.h" +#include "mozilla/Unused.h" +#include "mozilla/VsyncDispatcher.h" +#include "mozilla/dom/BrowserParent.h" +#include "mozilla/dom/ContentChild.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/SimpleGestureEventBinding.h" +#include "mozilla/gfx/2D.h" +#include "mozilla/gfx/GPUProcessManager.h" +#include "mozilla/gfx/gfxVars.h" +#include "mozilla/layers/APZCCallbackHelper.h" +#include "mozilla/layers/TouchActionHelper.h" +#include "mozilla/layers/APZEventState.h" +#include "mozilla/layers/APZInputBridge.h" +#include "mozilla/layers/APZThreadUtils.h" +#include "mozilla/layers/ChromeProcessController.h" +#include "mozilla/layers/Compositor.h" +#include "mozilla/layers/CompositorBridgeChild.h" +#include "mozilla/layers/CompositorBridgeParent.h" +#include "mozilla/layers/CompositorOptions.h" +#include "mozilla/layers/IAPZCTreeManager.h" +#include "mozilla/layers/ImageBridgeChild.h" +#include "mozilla/layers/InputAPZContext.h" +#include "mozilla/layers/WebRenderLayerManager.h" +#include "mozilla/webrender/WebRenderTypes.h" +#include "mozilla/widget/ScreenManager.h" +#include "nsAppDirectoryServiceDefs.h" +#include "nsCOMPtr.h" +#include "nsContentUtils.h" +#include "nsDeviceContext.h" +#include "nsGfxCIID.h" +#include "nsIAppWindow.h" +#include "nsIBaseWindow.h" +#include "nsIContent.h" +#include "nsIScreenManager.h" +#include "nsISimpleEnumerator.h" +#include "nsIWidgetListener.h" +#include "nsRefPtrHashtable.h" +#include "nsServiceManagerUtils.h" +#include "nsWidgetsCID.h" +#include "nsXULPopupManager.h" +#include "prdtoa.h" +#include "prenv.h" +#ifdef ACCESSIBILITY +# include "nsAccessibilityService.h" +#endif +#include "gfxConfig.h" +#include "gfxUtils.h" // for ToDeviceColor +#include "mozilla/layers/CompositorSession.h" +#include "VRManagerChild.h" +#include "gfxConfig.h" +#include "nsView.h" +#include "nsViewManager.h" + +static mozilla::LazyLogModule sBaseWidgetLog("BaseWidget"); + +#ifdef DEBUG +# include "nsIObserver.h" + +static void debug_RegisterPrefCallbacks(); + +#endif + +#ifdef NOISY_WIDGET_LEAKS +static int32_t gNumWidgets; +#endif + +#ifdef XP_MACOSX +# include "nsCocoaFeatures.h" +#endif + +using namespace mozilla::dom; +using namespace mozilla::layers; +using namespace mozilla::ipc; +using namespace mozilla::widget; +using namespace mozilla; + +// Async pump timer during injected long touch taps +#define TOUCH_INJECT_PUMP_TIMER_MSEC 50 +#define TOUCH_INJECT_LONG_TAP_DEFAULT_MSEC 1500 +int32_t nsIWidget::sPointerIdCounter = 0; + +// Some statics from nsIWidget.h +/*static*/ +uint64_t AutoObserverNotifier::sObserverId = 0; +/*static*/ nsTHashMap<uint64_t, nsCOMPtr<nsIObserver>> + AutoObserverNotifier::sSavedObservers; + +// The maximum amount of time to let the EnableDragDrop runnable wait in the +// idle queue before timing out and moving it to the regular queue. Value is in +// milliseconds. +const uint32_t kAsyncDragDropTimeout = 1000; + +NS_IMPL_ISUPPORTS(nsBaseWidget, nsIWidget, nsISupportsWeakReference) + +//------------------------------------------------------------------------- +// +// nsBaseWidget constructor +// +//------------------------------------------------------------------------- + +nsBaseWidget::nsBaseWidget() : nsBaseWidget(eBorderStyle_none) {} + +nsBaseWidget::nsBaseWidget(nsBorderStyle aBorderStyle) + : mWidgetListener(nullptr), + mAttachedWidgetListener(nullptr), + mPreviouslyAttachedWidgetListener(nullptr), + mCompositorVsyncDispatcher(nullptr), + mBorderStyle(aBorderStyle), + mBounds(0, 0, 0, 0), + mIsTiled(false), + mPopupLevel(ePopupLevelTop), + mPopupType(ePopupTypeAny), + mHasRemoteContent(false), + mUpdateCursor(true), + mUseAttachedEvents(false), + mIMEHasFocus(false), + mIMEHasQuit(false), + mIsFullyOccluded(false), + mNeedFastSnaphot(false), + mCurrentPanGestureBelongsToSwipe(false) { +#ifdef NOISY_WIDGET_LEAKS + gNumWidgets++; + printf("WIDGETS+ = %d\n", gNumWidgets); +#endif + +#ifdef DEBUG + debug_RegisterPrefCallbacks(); +#endif + + mShutdownObserver = new WidgetShutdownObserver(this); +} + +NS_IMPL_ISUPPORTS(WidgetShutdownObserver, nsIObserver) + +WidgetShutdownObserver::WidgetShutdownObserver(nsBaseWidget* aWidget) + : mWidget(aWidget), mRegistered(false) { + Register(); +} + +WidgetShutdownObserver::~WidgetShutdownObserver() { + // No need to call Unregister(), we can't be destroyed until nsBaseWidget + // gets torn down. The observer service and nsBaseWidget have a ref on us + // so nsBaseWidget has to call Unregister and then clear its ref. +} + +NS_IMETHODIMP +WidgetShutdownObserver::Observe(nsISupports* aSubject, const char* aTopic, + const char16_t* aData) { + if (!mWidget) { + return NS_OK; + } + if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) { + RefPtr<nsBaseWidget> widget(mWidget); + widget->Shutdown(); + } else if (!strcmp(aTopic, "quit-application")) { + RefPtr<nsBaseWidget> widget(mWidget); + widget->QuitIME(); + } + return NS_OK; +} + +void WidgetShutdownObserver::Register() { + if (!mRegistered) { + mRegistered = true; + nsContentUtils::RegisterShutdownObserver(this); + +#ifndef MOZ_WIDGET_ANDROID + // The primary purpose of observing quit-application is + // to avoid leaking a widget on Windows when nothing else + // breaks the circular reference between the widget and + // TSFTextStore. However, our Android IME code crashes if + // doing this on Android, so let's not do this on Android. + // Doing this on Gtk and Mac just in case. + nsCOMPtr<nsIObserverService> observerService = + mozilla::services::GetObserverService(); + if (observerService) { + observerService->AddObserver(this, "quit-application", false); + } +#endif + } +} + +void WidgetShutdownObserver::Unregister() { + if (mRegistered) { + mWidget = nullptr; + +#ifndef MOZ_WIDGET_ANDROID + nsCOMPtr<nsIObserverService> observerService = + mozilla::services::GetObserverService(); + if (observerService) { + observerService->RemoveObserver(this, "quit-application"); + } +#endif + + nsContentUtils::UnregisterShutdownObserver(this); + mRegistered = false; + } +} + +#define INTL_APP_LOCALES_CHANGED "intl:app-locales-changed" + +NS_IMPL_ISUPPORTS(LocalesChangedObserver, nsIObserver) + +LocalesChangedObserver::LocalesChangedObserver(nsBaseWidget* aWidget) + : mWidget(aWidget), mRegistered(false) { + Register(); +} + +LocalesChangedObserver::~LocalesChangedObserver() { + // No need to call Unregister(), we can't be destroyed until nsBaseWidget + // gets torn down. The observer service and nsBaseWidget have a ref on us + // so nsBaseWidget has to call Unregister and then clear its ref. +} + +NS_IMETHODIMP +LocalesChangedObserver::Observe(nsISupports* aSubject, const char* aTopic, + const char16_t* aData) { + if (!mWidget) { + return NS_OK; + } + if (!strcmp(aTopic, INTL_APP_LOCALES_CHANGED)) { + RefPtr<nsBaseWidget> widget(mWidget); + widget->LocalesChanged(); + } + return NS_OK; +} + +void LocalesChangedObserver::Register() { + if (mRegistered) { + return; + } + + nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); + if (obs) { + obs->AddObserver(this, INTL_APP_LOCALES_CHANGED, true); + } + + // Locale might be update before registering + RefPtr<nsBaseWidget> widget(mWidget); + widget->LocalesChanged(); + + mRegistered = true; +} + +void LocalesChangedObserver::Unregister() { + if (!mRegistered) { + return; + } + + nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService(); + if (obs) { + obs->RemoveObserver(this, INTL_APP_LOCALES_CHANGED); + } + + mWidget = nullptr; + mRegistered = false; +} + +void nsBaseWidget::Shutdown() { + NotifyLiveResizeStopped(); + DestroyCompositor(); + FreeLocalesChangedObserver(); + FreeShutdownObserver(); +} + +void nsBaseWidget::QuitIME() { + IMEStateManager::WidgetOnQuit(this); + this->mIMEHasQuit = true; +} + +void nsBaseWidget::DestroyCompositor() { + RevokeTransactionIdAllocator(); + + // We release this before releasing the compositor, since it may hold the + // last reference to our ClientLayerManager. ClientLayerManager's dtor can + // trigger a paint, creating a new compositor, and we don't want to re-use + // the old vsync dispatcher. + if (mCompositorVsyncDispatcher) { + MOZ_ASSERT(mCompositorVsyncDispatcherLock.get()); + + MutexAutoLock lock(*mCompositorVsyncDispatcherLock.get()); + mCompositorVsyncDispatcher->Shutdown(); + mCompositorVsyncDispatcher = nullptr; + } + + // The compositor shutdown sequence looks like this: + // 1. CompositorSession calls CompositorBridgeChild::Destroy. + // 2. CompositorBridgeChild synchronously sends WillClose. + // 3. CompositorBridgeParent releases some resources (such as the layer + // manager, compositor, and widget). + // 4. CompositorBridgeChild::Destroy returns. + // 5. Asynchronously, CompositorBridgeParent::ActorDestroy will fire on the + // compositor thread when the I/O thread closes the IPC channel. + // 6. Step 5 will schedule DeferredDestroy on the compositor thread, which + // releases the reference CompositorBridgeParent holds to itself. + // + // When CompositorSession::Shutdown returns, we assume the compositor is gone + // or will be gone very soon. + if (mCompositorSession) { + ReleaseContentController(); + mAPZC = nullptr; + SetCompositorWidgetDelegate(nullptr); + mCompositorBridgeChild = nullptr; + mCompositorSession->Shutdown(); + mCompositorSession = nullptr; + } +} + +// This prevents the layer manager from starting a new transaction during +// shutdown. +void nsBaseWidget::RevokeTransactionIdAllocator() { + if (!mWindowRenderer || !mWindowRenderer->AsWebRender()) { + return; + } + mWindowRenderer->AsWebRender()->SetTransactionIdAllocator(nullptr); +} + +void nsBaseWidget::ReleaseContentController() { + if (mRootContentController) { + mRootContentController->Destroy(); + mRootContentController = nullptr; + } +} + +void nsBaseWidget::DestroyLayerManager() { + if (mWindowRenderer) { + mWindowRenderer->Destroy(); + mWindowRenderer = nullptr; + } + DestroyCompositor(); +} + +void nsBaseWidget::OnRenderingDeviceReset() { DestroyLayerManager(); } + +void nsBaseWidget::FreeShutdownObserver() { + if (mShutdownObserver) { + mShutdownObserver->Unregister(); + } + mShutdownObserver = nullptr; +} + +void nsBaseWidget::FreeLocalesChangedObserver() { + if (mLocalesChangedObserver) { + mLocalesChangedObserver->Unregister(); + } + mLocalesChangedObserver = nullptr; +} + +//------------------------------------------------------------------------- +// +// nsBaseWidget destructor +// +//------------------------------------------------------------------------- + +nsBaseWidget::~nsBaseWidget() { + if (mSwipeTracker) { + mSwipeTracker->Destroy(); + mSwipeTracker = nullptr; + } + + IMEStateManager::WidgetDestroyed(this); + + FreeLocalesChangedObserver(); + FreeShutdownObserver(); + DestroyLayerManager(); + +#ifdef NOISY_WIDGET_LEAKS + gNumWidgets--; + printf("WIDGETS- = %d\n", gNumWidgets); +#endif +} + +//------------------------------------------------------------------------- +// +// Basic create. +// +//------------------------------------------------------------------------- +void nsBaseWidget::BaseCreate(nsIWidget* aParent, nsWidgetInitData* aInitData) { + if (aInitData) { + mWindowType = aInitData->mWindowType; + mBorderStyle = aInitData->mBorderStyle; + mPopupLevel = aInitData->mPopupLevel; + mPopupType = aInitData->mPopupHint; + mHasRemoteContent = aInitData->mHasRemoteContent; + } + + if (aParent) { + aParent->AddChild(this); + } +} + +//------------------------------------------------------------------------- +// +// Accessor functions to get/set the client data +// +//------------------------------------------------------------------------- + +nsIWidgetListener* nsBaseWidget::GetWidgetListener() const { + return mWidgetListener; +} + +void nsBaseWidget::SetWidgetListener(nsIWidgetListener* aWidgetListener) { + mWidgetListener = aWidgetListener; +} + +already_AddRefed<nsIWidget> nsBaseWidget::CreateChild( + const LayoutDeviceIntRect& aRect, nsWidgetInitData* aInitData, + bool aForceUseIWidgetParent) { + nsIWidget* parent = this; + nsNativeWidget nativeParent = nullptr; + + if (!aForceUseIWidgetParent) { + // Use only either parent or nativeParent, not both, to match + // existing code. Eventually Create() should be divested of its + // nativeWidget parameter. + nativeParent = parent ? parent->GetNativeData(NS_NATIVE_WIDGET) : nullptr; + parent = nativeParent ? nullptr : parent; + MOZ_ASSERT(!parent || !nativeParent, "messed up logic"); + } + + nsCOMPtr<nsIWidget> widget; + if (aInitData && aInitData->mWindowType == eWindowType_popup) { + widget = AllocateChildPopupWidget(); + } else { + widget = nsIWidget::CreateChildWindow(); + } + + if (widget && mNeedFastSnaphot) { + widget->SetNeedFastSnaphot(); + } + + if (widget && + NS_SUCCEEDED(widget->Create(parent, nativeParent, aRect, aInitData))) { + return widget.forget(); + } + + return nullptr; +} + +// Attach a view to our widget which we'll send events to. +void nsBaseWidget::AttachViewToTopLevel(bool aUseAttachedEvents) { + NS_ASSERTION((mWindowType == eWindowType_toplevel || + mWindowType == eWindowType_dialog || + mWindowType == eWindowType_invisible || + mWindowType == eWindowType_child), + "Can't attach to window of that type"); + + mUseAttachedEvents = aUseAttachedEvents; +} + +nsIWidgetListener* nsBaseWidget::GetAttachedWidgetListener() const { + return mAttachedWidgetListener; +} + +nsIWidgetListener* nsBaseWidget::GetPreviouslyAttachedWidgetListener() { + return mPreviouslyAttachedWidgetListener; +} + +void nsBaseWidget::SetPreviouslyAttachedWidgetListener( + nsIWidgetListener* aListener) { + mPreviouslyAttachedWidgetListener = aListener; +} + +void nsBaseWidget::SetAttachedWidgetListener(nsIWidgetListener* aListener) { + mAttachedWidgetListener = aListener; +} + +//------------------------------------------------------------------------- +// +// Close this nsBaseWidget +// +//------------------------------------------------------------------------- +void nsBaseWidget::Destroy() { + // Just in case our parent is the only ref to us + nsCOMPtr<nsIWidget> kungFuDeathGrip(this); + // disconnect from the parent + nsIWidget* parent = GetParent(); + if (parent) { + parent->RemoveChild(this); + } +} + +//------------------------------------------------------------------------- +// +// Get this nsBaseWidget parent +// +//------------------------------------------------------------------------- +nsIWidget* nsBaseWidget::GetParent(void) { return nullptr; } + +//------------------------------------------------------------------------- +// +// Get this nsBaseWidget top level widget +// +//------------------------------------------------------------------------- +nsIWidget* nsBaseWidget::GetTopLevelWidget() { + nsIWidget *topLevelWidget = nullptr, *widget = this; + while (widget) { + topLevelWidget = widget; + widget = widget->GetParent(); + } + return topLevelWidget; +} + +//------------------------------------------------------------------------- +// +// Get this nsBaseWidget's top (non-sheet) parent (if it's a sheet) +// +//------------------------------------------------------------------------- +nsIWidget* nsBaseWidget::GetSheetWindowParent(void) { return nullptr; } + +float nsBaseWidget::GetDPI() { return 96.0f; } + +CSSToLayoutDeviceScale nsIWidget::GetDefaultScale() { + double devPixelsPerCSSPixel = StaticPrefs::layout_css_devPixelsPerPx(); + + if (devPixelsPerCSSPixel <= 0.0) { + devPixelsPerCSSPixel = GetDefaultScaleInternal(); + } + + return CSSToLayoutDeviceScale(devPixelsPerCSSPixel); +} + +nsIntSize nsIWidget::CustomCursorSize(const Cursor& aCursor) { + MOZ_ASSERT(aCursor.IsCustom()); + int32_t width = 0; + int32_t height = 0; + aCursor.mContainer->GetWidth(&width); + aCursor.mContainer->GetHeight(&height); + aCursor.mResolution.ApplyTo(width, height); + return {width, height}; +} + +RefPtr<mozilla::VsyncDispatcher> nsIWidget::GetVsyncDispatcher() { + return nullptr; +} + +//------------------------------------------------------------------------- +// +// Add a child to the list of children +// +//------------------------------------------------------------------------- +void nsBaseWidget::AddChild(nsIWidget* aChild) { + MOZ_ASSERT(!aChild->GetNextSibling() && !aChild->GetPrevSibling(), + "aChild not properly removed from its old child list"); + + if (!mFirstChild) { + mFirstChild = mLastChild = aChild; + } else { + // append to the list + MOZ_ASSERT(mLastChild); + MOZ_ASSERT(!mLastChild->GetNextSibling()); + mLastChild->SetNextSibling(aChild); + aChild->SetPrevSibling(mLastChild); + mLastChild = aChild; + } +} + +//------------------------------------------------------------------------- +// +// Remove a child from the list of children +// +//------------------------------------------------------------------------- +void nsBaseWidget::RemoveChild(nsIWidget* aChild) { +#ifdef DEBUG +# ifdef XP_MACOSX + // nsCocoaWindow doesn't implement GetParent, so in that case parent will be + // null and we'll just have to do without this assertion. + nsIWidget* parent = aChild->GetParent(); + NS_ASSERTION(!parent || parent == this, "Not one of our kids!"); +# else + MOZ_RELEASE_ASSERT(aChild->GetParent() == this, "Not one of our kids!"); +# endif +#endif + + if (mLastChild == aChild) { + mLastChild = mLastChild->GetPrevSibling(); + } + if (mFirstChild == aChild) { + mFirstChild = mFirstChild->GetNextSibling(); + } + + // Now remove from the list. Make sure that we pass ownership of the tail + // of the list correctly before we have aChild let go of it. + nsIWidget* prev = aChild->GetPrevSibling(); + nsIWidget* next = aChild->GetNextSibling(); + if (prev) { + prev->SetNextSibling(next); + } + if (next) { + next->SetPrevSibling(prev); + } + + aChild->SetNextSibling(nullptr); + aChild->SetPrevSibling(nullptr); +} + +//------------------------------------------------------------------------- +// +// Sets widget's position within its parent's child list. +// +//------------------------------------------------------------------------- +void nsBaseWidget::SetZIndex(int32_t aZIndex) { + // Hold a ref to ourselves just in case, since we're going to remove + // from our parent. + nsCOMPtr<nsIWidget> kungFuDeathGrip(this); + + mZIndex = aZIndex; + + // reorder this child in its parent's list. + auto* parent = static_cast<nsBaseWidget*>(GetParent()); + if (parent) { + parent->RemoveChild(this); + // Scope sib outside the for loop so we can check it afterward + nsIWidget* sib = parent->GetFirstChild(); + for (; sib; sib = sib->GetNextSibling()) { + int32_t childZIndex = GetZIndex(); + if (aZIndex < childZIndex) { + // Insert ourselves before sib + nsIWidget* prev = sib->GetPrevSibling(); + mNextSibling = sib; + mPrevSibling = prev; + sib->SetPrevSibling(this); + if (prev) { + prev->SetNextSibling(this); + } else { + NS_ASSERTION(sib == parent->mFirstChild, "Broken child list"); + // We've taken ownership of sib, so it's safe to have parent let + // go of it + parent->mFirstChild = this; + } + PlaceBehind(eZPlacementBelow, sib, false); + break; + } + } + // were we added to the list? + if (!sib) { + parent->AddChild(this); + } + } +} + +void nsBaseWidget::GetWorkspaceID(nsAString& workspaceID) { + workspaceID.Truncate(); +} + +void nsBaseWidget::MoveToWorkspace(const nsAString& workspaceID) { + // Noop. +} + +//------------------------------------------------------------------------- +// +// Get this component cursor +// +//------------------------------------------------------------------------- + +void nsBaseWidget::SetCursor(const Cursor& aCursor) { mCursor = aCursor; } + +//------------------------------------------------------------------------- +// +// Window transparency methods +// +//------------------------------------------------------------------------- + +void nsBaseWidget::SetTransparencyMode(nsTransparencyMode aMode) {} + +nsTransparencyMode nsBaseWidget::GetTransparencyMode() { + return eTransparencyOpaque; +} + +/* virtual */ +void nsBaseWidget::PerformFullscreenTransition(FullscreenTransitionStage aStage, + uint16_t aDuration, + nsISupports* aData, + nsIRunnable* aCallback) { + MOZ_ASSERT_UNREACHABLE( + "Should never call PerformFullscreenTransition on nsBaseWidget"); +} + +//------------------------------------------------------------------------- +// +// Put the window into full-screen mode +// +//------------------------------------------------------------------------- +void nsBaseWidget::InfallibleMakeFullScreen(bool aFullScreen) { +#define MOZ_FORMAT_RECT(fmtstr) "[" fmtstr "," fmtstr " " fmtstr "x" fmtstr "]" +#define MOZ_SPLAT_RECT(rect) \ + (rect).X(), (rect).Y(), (rect).Width(), (rect).Height() + + // Windows which can be made fullscreen are exactly those which are located on + // the desktop, rather than being a child of some other window. + MOZ_DIAGNOSTIC_ASSERT(BoundsUseDesktopPixels(), + "non-desktop windows cannot be made fullscreen"); + + // Ensure that the OS chrome is hidden/shown before we resize and/or exit the + // function. + // + // HideWindowChrome() may (depending on platform, implementation details, and + // OS-level user preferences) alter the reported size of the window. The + // obvious and principled solution is socks-and-shoes: + // - On entering fullscreen mode: hide window chrome, then perform resize. + // - On leaving fullscreen mode: unperform resize, then show window chrome. + // + // ... unfortunately, HideWindowChrome() requires Resize() to be called + // afterwards (see bug 498835), which prevents this from being done in a + // straightforward way. + // + // Instead, we always call HideWindowChrome() just before we call Resize(). + // This at least ensures that our measurements are consistently taken in a + // pre-transition state. + // + // ... unfortunately again, coupling HideWindowChrome() to Resize() means that + // we have to worry about the possibility of control flows that don't call + // Resize() at all. (That shouldn't happen, but it's not trivial to rule out.) + // We therefore set up a fallback to fix up the OS chrome if it hasn't been + // done at exit time. + bool hasAdjustedOSChrome = false; + const auto adjustOSChrome = [&]() { + if (hasAdjustedOSChrome) { + MOZ_ASSERT_UNREACHABLE("window chrome should only be adjusted once"); + return; + } + HideWindowChrome(aFullScreen); + hasAdjustedOSChrome = true; + }; + const auto adjustChromeOnScopeExit = MakeScopeExit([&]() { + if (hasAdjustedOSChrome) { + return; + } + + MOZ_LOG(sBaseWidgetLog, LogLevel::Warning, + ("window was not resized within InfallibleMakeFullScreen()")); + + // Hide chrome and "resize" the window to its current size. + auto rect = GetBounds(); + adjustOSChrome(); + Resize(rect.X(), rect.Y(), rect.Width(), rect.Height(), true); + }); + + // Attempt to resize to `rect`. + // + // Returns the actual rectangle resized to. (This may differ from `rect`, if + // the OS is unhappy with it. See bug 1786226.) + const auto doReposition = [&](auto rect) -> void { + static_assert(std::is_base_of_v<DesktopPixel, + std::remove_reference_t<decltype(rect)>>, + "doReposition requires a rectangle using desktop pixels"); + + if (MOZ_LOG_TEST(sBaseWidgetLog, LogLevel::Debug)) { + const DesktopRect previousSize = + GetScreenBounds() / GetDesktopToDeviceScale(); + MOZ_LOG(sBaseWidgetLog, LogLevel::Debug, + ("before resize: " MOZ_FORMAT_RECT("%f"), + MOZ_SPLAT_RECT(previousSize))); + } + + adjustOSChrome(); + Resize(rect.X(), rect.Y(), rect.Width(), rect.Height(), true); + + if (MOZ_LOG_TEST(sBaseWidgetLog, LogLevel::Warning)) { + // `rect` may have any underlying data type; coerce to float to + // simplify printf-style logging + const gfx::RectTyped<DesktopPixel, float> rectAsFloat{rect}; + + // The OS may have objected to the target position. That's not necessarily + // a problem -- it'll happen regularly on Macs with camera notches in the + // monitor, for instance (see bug 1786226) -- but it probably deserves to + // be called out. + // + // Since there's floating-point math involved, the actual values may be + // off by a few ulps -- as an upper bound, perhaps 8 * FLT_EPSILON * + // max(MOZ_SPLAT_RECT(rect)) -- but 0.01 should be several orders of + // magnitude bigger than that. + + const auto postResizeRectRaw = GetScreenBounds(); + const auto postResizeRect = postResizeRectRaw / GetDesktopToDeviceScale(); + const bool succeeded = postResizeRect.WithinEpsilonOf(rectAsFloat, 0.01); + + if (succeeded) { + MOZ_LOG(sBaseWidgetLog, LogLevel::Debug, + ("resized to: " MOZ_FORMAT_RECT("%f"), + MOZ_SPLAT_RECT(rectAsFloat))); + } else { + MOZ_LOG(sBaseWidgetLog, LogLevel::Warning, + ("attempted to resize to: " MOZ_FORMAT_RECT("%f"), + MOZ_SPLAT_RECT(rectAsFloat))); + MOZ_LOG(sBaseWidgetLog, LogLevel::Warning, + ("... but ended up at: " MOZ_FORMAT_RECT("%f"), + MOZ_SPLAT_RECT(postResizeRect))); + } + + MOZ_LOG( + sBaseWidgetLog, LogLevel::Verbose, + ("(... which, before DPI adjustment, is:" MOZ_FORMAT_RECT("%d") ")", + MOZ_SPLAT_RECT(postResizeRectRaw))); + } + }; + + if (aFullScreen) { + if (!mSavedBounds) { + mSavedBounds = Some(FullscreenSavedState()); + } + // save current position + mSavedBounds->windowRect = GetScreenBounds() / GetDesktopToDeviceScale(); + + nsCOMPtr<nsIScreen> screen = GetWidgetScreen(); + if (!screen) { + return; + } + + // Move to fill the screen. + doReposition(screen->GetRectDisplayPix()); + // Save off the new position. (This may differ from GetRectDisplayPix(), if + // the OS was unhappy with it. See bug 1786226.) + mSavedBounds->screenRect = GetScreenBounds() / GetDesktopToDeviceScale(); + } else { + if (!mSavedBounds) { + // This should never happen, at present, since we don't make windows + // fullscreen at their creation time; but it's not logically impossible. + MOZ_ASSERT(false, "fullscreen window did not have saved position"); + return; + } + + // Figure out where to go from here. + // + // Fortunately, since we're currently fullscreen (and other code should be + // handling _keeping_ us fullscreen even after display-layout changes), + // there's an obvious choice for which display we should attach to; all we + // need to determine is where on that display we should go. + + const DesktopRect currentWinRect = + GetScreenBounds() / GetDesktopToDeviceScale(); + + // Optimization: if where we are is where we were, then where we originally + // came from is where we're going to go. + if (currentWinRect == DesktopRect(mSavedBounds->screenRect)) { + MOZ_LOG(sBaseWidgetLog, LogLevel::Debug, + ("no location change detected; returning to saved location")); + doReposition(mSavedBounds->windowRect); + return; + } + + /* + General case: figure out where we're going to go by dividing where we are + by where we were, and then multiplying by where we originally came from. + + Less abstrusely: resize so that we occupy the same proportional position + on our current display after leaving fullscreen as we occupied on our + previous display before entering fullscreen. + + (N.B.: We do not clamp. If we were only partially on the old display, + we'll be only partially on the new one, too.) + */ + + MOZ_LOG(sBaseWidgetLog, LogLevel::Debug, + ("location change detected; computing new destination")); + + // splat: convert an arbitrary Rect into a tuple, for syntactic convenience. + const auto splat = [](auto rect) { + return std::tuple(rect.X(), rect.Y(), rect.Width(), rect.Height()); + }; + + // remap: find the unique affine mapping which transforms `src` to `dst`, + // and apply it to `val`. + using Range = std::pair<float, float>; + const auto remap = [](Range dst, Range src, float val) { + // linear interpolation and its inverse: lerp(a, b, invlerp(a, b, t)) == t + const auto lerp = [](float lo, float hi, float t) { + return lo + t * (hi - lo); + }; + const auto invlerp = [](float lo, float hi, float mid) { + return (mid - lo) / (hi - lo); + }; + + const auto [dst_a, dst_b] = dst; + const auto [src_a, src_b] = src; + return lerp(dst_a, dst_b, invlerp(src_a, src_b, val)); + }; + + // original position + const auto [px, py, pw, ph] = splat(mSavedBounds->windowRect); + // source desktop rect + const auto [sx, sy, sw, sh] = splat(mSavedBounds->screenRect); + // target desktop rect + const auto [tx, ty, tw, th] = splat(currentWinRect); + + const float nx = remap({tx, tx + tw}, {sx, sx + sw}, px); + const float ny = remap({ty, ty + th}, {sy, sy + sh}, py); + const float nw = remap({0, tw}, {0, sw}, pw); + const float nh = remap({0, th}, {0, sh}, ph); + + doReposition(DesktopRect{nx, ny, nw, nh}); + } + +#undef MOZ_SPLAT_RECT +#undef MOZ_FORMAT_RECT +} + +nsresult nsBaseWidget::MakeFullScreen(bool aFullScreen) { + InfallibleMakeFullScreen(aFullScreen); + return NS_OK; +} + +nsBaseWidget::AutoLayerManagerSetup::AutoLayerManagerSetup( + nsBaseWidget* aWidget, gfxContext* aTarget, BufferMode aDoubleBuffering) + : mWidget(aWidget) { + WindowRenderer* renderer = mWidget->GetWindowRenderer(); + if (renderer->AsFallback()) { + mRenderer = renderer->AsFallback(); + mRenderer->SetTarget(aTarget, aDoubleBuffering); + } +} + +nsBaseWidget::AutoLayerManagerSetup::~AutoLayerManagerSetup() { + if (mRenderer) { + mRenderer->SetTarget(nullptr, mozilla::layers::BufferMode::BUFFER_NONE); + } +} + +bool nsBaseWidget::IsSmallPopup() const { + return mWindowType == eWindowType_popup && mPopupType != ePopupTypePanel; +} + +bool nsBaseWidget::ComputeShouldAccelerate() { + return gfx::gfxConfig::IsEnabled(gfx::Feature::HW_COMPOSITING) && + (WidgetTypeSupportsAcceleration() || + StaticPrefs::gfx_webrender_unaccelerated_widget_force()); +} + +bool nsBaseWidget::UseAPZ() { + return (gfxPlatform::AsyncPanZoomEnabled() && + (WindowType() == eWindowType_toplevel || + WindowType() == eWindowType_child || + ((WindowType() == eWindowType_popup || + WindowType() == eWindowType_dialog) && + HasRemoteContent() && StaticPrefs::apz_popups_enabled()))); +} + +void nsBaseWidget::CreateCompositor() { + LayoutDeviceIntRect rect = GetBounds(); + CreateCompositor(rect.Width(), rect.Height()); +} + +already_AddRefed<GeckoContentController> +nsBaseWidget::CreateRootContentController() { + RefPtr<GeckoContentController> controller = + new ChromeProcessController(this, mAPZEventState, mAPZC); + return controller.forget(); +} + +void nsBaseWidget::ConfigureAPZCTreeManager() { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(mAPZC); + + mAPZC->SetDPI(GetDPI()); + + if (StaticPrefs::apz_keyboard_enabled_AtStartup()) { + KeyboardMap map = RootWindowGlobalKeyListener::CollectKeyboardShortcuts(); + mAPZC->SetKeyboardMap(map); + } + + ContentReceivedInputBlockCallback callback( + [treeManager = RefPtr{mAPZC.get()}](uint64_t aInputBlockId, + bool aPreventDefault) { + MOZ_ASSERT(NS_IsMainThread()); + treeManager->ContentReceivedInputBlock(aInputBlockId, aPreventDefault); + }); + mAPZEventState = new APZEventState(this, std::move(callback)); + + mRootContentController = CreateRootContentController(); + if (mRootContentController) { + mCompositorSession->SetContentController(mRootContentController); + } + + // When APZ is enabled, we can actually enable raw touch events because we + // have code that can deal with them properly. If APZ is not enabled, this + // function doesn't get called. + if (StaticPrefs::dom_w3c_touch_events_enabled()) { + RegisterTouchWindow(); + } +} + +void nsBaseWidget::ConfigureAPZControllerThread() { + // By default the controller thread is the main thread. + APZThreadUtils::SetControllerThread(NS_GetCurrentThread()); +} + +void nsBaseWidget::SetConfirmedTargetAPZC( + uint64_t aInputBlockId, + const nsTArray<ScrollableLayerGuid>& aTargets) const { + mAPZC->SetTargetAPZC(aInputBlockId, aTargets); +} + +void nsBaseWidget::UpdateZoomConstraints( + const uint32_t& aPresShellId, const ScrollableLayerGuid::ViewID& aViewId, + const Maybe<ZoomConstraints>& aConstraints) { + if (!mCompositorSession || !mAPZC) { + if (mInitialZoomConstraints) { + MOZ_ASSERT(mInitialZoomConstraints->mPresShellID == aPresShellId); + MOZ_ASSERT(mInitialZoomConstraints->mViewID == aViewId); + if (!aConstraints) { + mInitialZoomConstraints.reset(); + } + } + + if (aConstraints) { + // We have some constraints, but the compositor and APZC aren't created + // yet. Save these so we can use them later. + mInitialZoomConstraints = Some( + InitialZoomConstraints(aPresShellId, aViewId, aConstraints.ref())); + } + return; + } + LayersId layersId = mCompositorSession->RootLayerTreeId(); + mAPZC->UpdateZoomConstraints( + ScrollableLayerGuid(layersId, aPresShellId, aViewId), aConstraints); +} + +bool nsBaseWidget::AsyncPanZoomEnabled() const { return !!mAPZC; } + +nsEventStatus nsBaseWidget::ProcessUntransformedAPZEvent( + WidgetInputEvent* aEvent, const APZEventResult& aApzResult) { + MOZ_ASSERT(NS_IsMainThread()); + ScrollableLayerGuid targetGuid = aApzResult.mTargetGuid; + uint64_t inputBlockId = aApzResult.mInputBlockId; + InputAPZContext context(aApzResult.mTargetGuid, inputBlockId, + aApzResult.GetStatus()); + + // Make a copy of the original event for the APZCCallbackHelper helpers that + // we call later, because the event passed to DispatchEvent can get mutated in + // ways that we don't want (i.e. touch points can get stripped out). + nsEventStatus status; + UniquePtr<WidgetEvent> original(aEvent->Duplicate()); + DispatchEvent(aEvent, status); + + if (mAPZC && !InputAPZContext::WasRoutedToChildProcess() && inputBlockId) { + // EventStateManager did not route the event into the child process. + // It's safe to communicate to APZ that the event has been processed. + // Note that here aGuid.mLayersId might be different from + // mCompositorSession->RootLayerTreeId() because the event might have gotten + // hit-tested by APZ to be targeted at a child process, but a parent process + // event listener called preventDefault on it. In that case aGuid.mLayersId + // would still be the layers id for the child process, but the event would + // not have actually gotten routed to the child process. The main-thread + // hit-test result therefore needs to use the parent process layers id. + LayersId rootLayersId = mCompositorSession->RootLayerTreeId(); + + RefPtr<DisplayportSetListener> postLayerization; + if (WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent()) { + nsTArray<TouchBehaviorFlags> allowedTouchBehaviors; + if (touchEvent->mMessage == eTouchStart) { + auto& originalEvent = *original->AsTouchEvent(); + MOZ_ASSERT(NS_IsMainThread()); + allowedTouchBehaviors = TouchActionHelper::GetAllowedTouchBehavior( + this, GetDocument(), originalEvent); + if (!allowedTouchBehaviors.IsEmpty()) { + mAPZC->SetAllowedTouchBehavior(inputBlockId, allowedTouchBehaviors); + } + postLayerization = APZCCallbackHelper::SendSetTargetAPZCNotification( + this, GetDocument(), originalEvent, rootLayersId, inputBlockId); + } + mAPZEventState->ProcessTouchEvent(*touchEvent, targetGuid, inputBlockId, + aApzResult.GetStatus(), status, + std::move(allowedTouchBehaviors)); + } else if (WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent()) { + MOZ_ASSERT(wheelEvent->mFlags.mHandledByAPZ); + postLayerization = APZCCallbackHelper::SendSetTargetAPZCNotification( + this, GetDocument(), *original->AsWheelEvent(), rootLayersId, + inputBlockId); + if (wheelEvent->mCanTriggerSwipe) { + ReportSwipeStarted(inputBlockId, wheelEvent->TriggersSwipe()); + } + mAPZEventState->ProcessWheelEvent(*wheelEvent, inputBlockId); + } else if (WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent()) { + MOZ_ASSERT(mouseEvent->mFlags.mHandledByAPZ); + postLayerization = APZCCallbackHelper::SendSetTargetAPZCNotification( + this, GetDocument(), *original->AsMouseEvent(), rootLayersId, + inputBlockId); + mAPZEventState->ProcessMouseEvent(*mouseEvent, inputBlockId); + } + if (postLayerization) { + postLayerization->Register(); + } + } + + return status; +} + +template <class InputType, class EventType> +class DispatchEventOnMainThread : public Runnable { + public: + DispatchEventOnMainThread(const InputType& aInput, nsBaseWidget* aWidget, + const APZEventResult& aAPZResult) + : mozilla::Runnable("DispatchEventOnMainThread"), + mInput(aInput), + mWidget(aWidget), + mAPZResult(aAPZResult) {} + + NS_IMETHOD Run() override { + EventType event = mInput.ToWidgetEvent(mWidget); + mWidget->ProcessUntransformedAPZEvent(&event, mAPZResult); + return NS_OK; + } + + private: + InputType mInput; + nsBaseWidget* mWidget; + APZEventResult mAPZResult; +}; + +template <class InputType, class EventType> +class DispatchInputOnControllerThread : public Runnable { + public: + DispatchInputOnControllerThread(const EventType& aEvent, + IAPZCTreeManager* aAPZC, + nsBaseWidget* aWidget) + : mozilla::Runnable("DispatchInputOnControllerThread"), + mMainMessageLoop(MessageLoop::current()), + mInput(aEvent), + mAPZC(aAPZC), + mWidget(aWidget) {} + + NS_IMETHOD Run() override { + APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(mInput); + if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) { + return NS_OK; + } + RefPtr<Runnable> r = new DispatchEventOnMainThread<InputType, EventType>( + mInput, mWidget, result); + mMainMessageLoop->PostTask(r.forget()); + return NS_OK; + } + + private: + MessageLoop* mMainMessageLoop; + InputType mInput; + RefPtr<IAPZCTreeManager> mAPZC; + nsBaseWidget* mWidget; +}; + +void nsBaseWidget::DispatchTouchInput(MultiTouchInput& aInput, + uint16_t aInputSource) { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(aInputSource == + mozilla::dom::MouseEvent_Binding::MOZ_SOURCE_TOUCH || + aInputSource == mozilla::dom::MouseEvent_Binding::MOZ_SOURCE_PEN); + if (mAPZC) { + MOZ_ASSERT(APZThreadUtils::IsControllerThread()); + + APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(aInput); + if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) { + return; + } + + WidgetTouchEvent event = aInput.ToWidgetEvent(this, aInputSource); + ProcessUntransformedAPZEvent(&event, result); + } else { + WidgetTouchEvent event = aInput.ToWidgetEvent(this, aInputSource); + + nsEventStatus status; + DispatchEvent(&event, status); + } +} + +void nsBaseWidget::DispatchPanGestureInput(PanGestureInput& aInput) { + MOZ_ASSERT(NS_IsMainThread()); + if (mAPZC) { + MOZ_ASSERT(APZThreadUtils::IsControllerThread()); + + APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(aInput); + if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) { + return; + } + + WidgetWheelEvent event = aInput.ToWidgetEvent(this); + ProcessUntransformedAPZEvent(&event, result); + } else { + WidgetWheelEvent event = aInput.ToWidgetEvent(this); + nsEventStatus status; + DispatchEvent(&event, status); + } +} + +void nsBaseWidget::DispatchPinchGestureInput(PinchGestureInput& aInput) { + MOZ_ASSERT(NS_IsMainThread()); + if (mAPZC) { + MOZ_ASSERT(APZThreadUtils::IsControllerThread()); + APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(aInput); + + if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) { + return; + } + WidgetWheelEvent event = aInput.ToWidgetEvent(this); + ProcessUntransformedAPZEvent(&event, result); + } else { + WidgetWheelEvent event = aInput.ToWidgetEvent(this); + nsEventStatus status; + DispatchEvent(&event, status); + } +} + +nsIWidget::ContentAndAPZEventStatus nsBaseWidget::DispatchInputEvent( + WidgetInputEvent* aEvent) { + nsIWidget::ContentAndAPZEventStatus status; + MOZ_ASSERT(NS_IsMainThread()); + if (mAPZC) { + if (APZThreadUtils::IsControllerThread()) { + APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(*aEvent); + status.mApzStatus = result.GetStatus(); + if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) { + return status; + } + status.mContentStatus = ProcessUntransformedAPZEvent(aEvent, result); + return status; + } + if (WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent()) { + RefPtr<Runnable> r = + new DispatchInputOnControllerThread<ScrollWheelInput, + WidgetWheelEvent>(*wheelEvent, + mAPZC, this); + APZThreadUtils::RunOnControllerThread(std::move(r)); + status.mContentStatus = nsEventStatus_eConsumeDoDefault; + return status; + } + if (WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent()) { + RefPtr<Runnable> r = + new DispatchInputOnControllerThread<MouseInput, WidgetMouseEvent>( + *mouseEvent, mAPZC, this); + APZThreadUtils::RunOnControllerThread(std::move(r)); + status.mContentStatus = nsEventStatus_eConsumeDoDefault; + return status; + } + if (WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent()) { + RefPtr<Runnable> r = + new DispatchInputOnControllerThread<MultiTouchInput, + WidgetTouchEvent>(*touchEvent, + mAPZC, this); + APZThreadUtils::RunOnControllerThread(std::move(r)); + status.mContentStatus = nsEventStatus_eConsumeDoDefault; + return status; + } + // Allow dispatching keyboard events on Gecko thread. + MOZ_ASSERT(aEvent->AsKeyboardEvent()); + } + + DispatchEvent(aEvent, status.mContentStatus); + return status; +} + +void nsBaseWidget::DispatchEventToAPZOnly(mozilla::WidgetInputEvent* aEvent) { + MOZ_ASSERT(NS_IsMainThread()); + if (mAPZC) { + MOZ_ASSERT(APZThreadUtils::IsControllerThread()); + mAPZC->InputBridge()->ReceiveInputEvent(*aEvent); + } +} + +bool nsBaseWidget::DispatchWindowEvent(WidgetGUIEvent& event) { + nsEventStatus status; + DispatchEvent(&event, status); + return ConvertStatus(status); +} + +Document* nsBaseWidget::GetDocument() const { + if (mWidgetListener) { + if (PresShell* presShell = mWidgetListener->GetPresShell()) { + return presShell->GetDocument(); + } + } + return nullptr; +} + +void nsBaseWidget::CreateCompositorVsyncDispatcher() { + // Parent directly listens to the vsync source whereas + // child process communicate via IPC + // Should be called AFTER gfxPlatform is initialized + if (XRE_IsParentProcess()) { + if (!mCompositorVsyncDispatcherLock) { + mCompositorVsyncDispatcherLock = + MakeUnique<Mutex>("mCompositorVsyncDispatcherLock"); + } + MutexAutoLock lock(*mCompositorVsyncDispatcherLock.get()); + if (!mCompositorVsyncDispatcher) { + RefPtr<VsyncDispatcher> vsyncDispatcher = + gfxPlatform::GetPlatform()->GetGlobalVsyncDispatcher(); + mCompositorVsyncDispatcher = + new CompositorVsyncDispatcher(std::move(vsyncDispatcher)); + } + } +} + +already_AddRefed<CompositorVsyncDispatcher> +nsBaseWidget::GetCompositorVsyncDispatcher() { + MOZ_ASSERT(mCompositorVsyncDispatcherLock.get()); + + MutexAutoLock lock(*mCompositorVsyncDispatcherLock.get()); + RefPtr<CompositorVsyncDispatcher> dispatcher = mCompositorVsyncDispatcher; + return dispatcher.forget(); +} + +already_AddRefed<WebRenderLayerManager> nsBaseWidget::CreateCompositorSession( + int aWidth, int aHeight, CompositorOptions* aOptionsOut) { + MOZ_ASSERT(aOptionsOut); + + do { + CreateCompositorVsyncDispatcher(); + + gfx::GPUProcessManager* gpu = gfx::GPUProcessManager::Get(); + // Make sure GPU process is ready for use. + // If it failed to connect to GPU process, GPU process usage is disabled in + // EnsureGPUReady(). It could update gfxVars and gfxConfigs. + gpu->EnsureGPUReady(); + + // If widget type does not supports acceleration, we may be allowed to use + // software WebRender instead. + bool supportsAcceleration = WidgetTypeSupportsAcceleration(); + bool enableSWWR = true; + if (supportsAcceleration || + StaticPrefs::gfx_webrender_unaccelerated_widget_force()) { + enableSWWR = gfx::gfxVars::UseSoftwareWebRender(); + } + bool enableAPZ = UseAPZ(); + CompositorOptions options(enableAPZ, enableSWWR); + +#ifdef XP_WIN + if (supportsAcceleration) { + options.SetAllowSoftwareWebRenderD3D11( + gfx::gfxVars::AllowSoftwareWebRenderD3D11()); + } + if (mNeedFastSnaphot) { + options.SetNeedFastSnaphot(true); + } +#elif defined(MOZ_WIDGET_ANDROID) + MOZ_ASSERT(supportsAcceleration); + options.SetAllowSoftwareWebRenderOGL( + StaticPrefs::gfx_webrender_software_opengl_AtStartup()); +#elif defined(MOZ_WIDGET_GTK) + if (supportsAcceleration) { + options.SetAllowSoftwareWebRenderOGL( + StaticPrefs::gfx_webrender_software_opengl_AtStartup()); + } +#endif + +#ifdef MOZ_WIDGET_ANDROID + // Unconditionally set the compositor as initially paused, as we have not + // yet had a chance to send the compositor surface to the GPU process. We + // will do so shortly once we have returned to nsWindow::CreateLayerManager, + // where we will also resume the compositor if required. + options.SetInitiallyPaused(true); +#else + options.SetInitiallyPaused(CompositorInitiallyPaused()); +#endif + + RefPtr<WebRenderLayerManager> lm = new WebRenderLayerManager(this); + + uint64_t innerWindowId = 0; + if (Document* doc = GetDocument()) { + innerWindowId = doc->InnerWindowID(); + } + + bool retry = false; + mCompositorSession = gpu->CreateTopLevelCompositor( + this, lm, GetDefaultScale(), options, UseExternalCompositingSurface(), + gfx::IntSize(aWidth, aHeight), innerWindowId, &retry); + + if (mCompositorSession) { + TextureFactoryIdentifier textureFactoryIdentifier; + nsCString error; + lm->Initialize(mCompositorSession->GetCompositorBridgeChild(), + wr::AsPipelineId(mCompositorSession->RootLayerTreeId()), + &textureFactoryIdentifier, error); + if (textureFactoryIdentifier.mParentBackend != LayersBackend::LAYERS_WR) { + retry = true; + DestroyCompositor(); + // gfxVars::UseDoubleBufferingWithCompositor() is also disabled. + gfx::GPUProcessManager::Get()->DisableWebRender( + wr::WebRenderError::INITIALIZE, error); + } + } + + // We need to retry in a loop because the act of failing to create the + // compositor can change our state (e.g. disable WebRender). + if (mCompositorSession || !retry) { + *aOptionsOut = options; + return lm.forget(); + } + } while (true); +} + +void nsBaseWidget::CreateCompositor(int aWidth, int aHeight) { + // This makes sure that gfxPlatforms gets initialized if it hasn't by now. + gfxPlatform::GetPlatform(); + + MOZ_ASSERT(gfxPlatform::UsesOffMainThreadCompositing(), + "This function assumes OMTC"); + + MOZ_ASSERT(!mCompositorSession && !mCompositorBridgeChild, + "Should have properly cleaned up the previous PCompositor pair " + "beforehand"); + + if (mCompositorBridgeChild) { + mCompositorBridgeChild->Destroy(); + } + + // Recreating this is tricky, as we may still have an old and we need + // to make sure it's properly destroyed by calling DestroyCompositor! + + // If we've already received a shutdown notification, don't try + // create a new compositor. + if (!mShutdownObserver) { + return; + } + + // The controller thread must be configured before the compositor + // session is created, so that the input bridge runs on the right + // thread. + ConfigureAPZControllerThread(); + + CompositorOptions options; + RefPtr<WebRenderLayerManager> lm = + CreateCompositorSession(aWidth, aHeight, &options); + if (!lm) { + return; + } + + MOZ_ASSERT(mCompositorSession); + mCompositorBridgeChild = mCompositorSession->GetCompositorBridgeChild(); + SetCompositorWidgetDelegate( + mCompositorSession->GetCompositorWidgetDelegate()); + + if (options.UseAPZ()) { + mAPZC = mCompositorSession->GetAPZCTreeManager(); + ConfigureAPZCTreeManager(); + } else { + mAPZC = nullptr; + } + + if (mInitialZoomConstraints) { + UpdateZoomConstraints(mInitialZoomConstraints->mPresShellID, + mInitialZoomConstraints->mViewID, + Some(mInitialZoomConstraints->mConstraints)); + mInitialZoomConstraints.reset(); + } + + TextureFactoryIdentifier textureFactoryIdentifier = + lm->GetTextureFactoryIdentifier(); + MOZ_ASSERT(textureFactoryIdentifier.mParentBackend == + LayersBackend::LAYERS_WR); + ImageBridgeChild::IdentifyCompositorTextureHost(textureFactoryIdentifier); + gfx::VRManagerChild::IdentifyTextureHost(textureFactoryIdentifier); + + WindowUsesOMTC(); + + mWindowRenderer = std::move(lm); + + // Only track compositors for top-level windows, since other window types + // may use the basic compositor. Except on the OS X - see bug 1306383 +#if defined(XP_MACOSX) + bool getCompositorFromThisWindow = true; +#else + bool getCompositorFromThisWindow = (mWindowType == eWindowType_toplevel); +#endif + + if (getCompositorFromThisWindow) { + gfxPlatform::GetPlatform()->NotifyCompositorCreated( + mWindowRenderer->GetCompositorBackendType()); + } +} + +void nsBaseWidget::NotifyCompositorSessionLost(CompositorSession* aSession) { + MOZ_ASSERT(aSession == mCompositorSession); + DestroyLayerManager(); +} + +bool nsBaseWidget::ShouldUseOffMainThreadCompositing() { + return gfxPlatform::UsesOffMainThreadCompositing(); +} + +WindowRenderer* nsBaseWidget::GetWindowRenderer() { + if (!mWindowRenderer) { + if (!mShutdownObserver) { + // We are shutting down, do not try to re-create a LayerManager + return nullptr; + } + // Try to use an async compositor first, if possible + if (ShouldUseOffMainThreadCompositing()) { + CreateCompositor(); + } + + if (!mWindowRenderer) { + mWindowRenderer = CreateFallbackRenderer(); + } + } + return mWindowRenderer; +} + +WindowRenderer* nsBaseWidget::CreateFallbackRenderer() { + return new FallbackRenderer; +} + +CompositorBridgeChild* nsBaseWidget::GetRemoteRenderer() { + return mCompositorBridgeChild; +} + +void nsBaseWidget::ClearCachedWebrenderResources() { + if (!mWindowRenderer || !mWindowRenderer->AsWebRender()) { + return; + } + mWindowRenderer->AsWebRender()->ClearCachedResources(); +} + +void nsBaseWidget::ClearWebrenderAnimationResources() { + if (!mWindowRenderer || !mWindowRenderer->AsWebRender()) { + return; + } + mWindowRenderer->AsWebRender()->ClearAnimationResources(); +} + +bool nsBaseWidget::SetNeedFastSnaphot() { + MOZ_ASSERT(XRE_IsParentProcess()); + MOZ_ASSERT(!mCompositorSession); + + if (!XRE_IsParentProcess() || mCompositorSession) { + return false; + } + + mNeedFastSnaphot = true; + return true; +} + +already_AddRefed<gfx::DrawTarget> nsBaseWidget::StartRemoteDrawing() { + return nullptr; +} + +uint32_t nsBaseWidget::GetGLFrameBufferFormat() { return LOCAL_GL_RGBA; } + +//------------------------------------------------------------------------- +// +// Destroy the window +// +//------------------------------------------------------------------------- +void nsBaseWidget::OnDestroy() { + if (mTextEventDispatcher) { + mTextEventDispatcher->OnDestroyWidget(); + // Don't release it until this widget actually released because after this + // is called, TextEventDispatcher() may create it again. + } + + // If this widget is being destroyed, let the APZ code know to drop references + // to this widget. Callers of this function all should be holding a deathgrip + // on this widget already. + ReleaseContentController(); +} + +void nsBaseWidget::MoveClient(const DesktopPoint& aOffset) { + LayoutDeviceIntPoint clientOffset(GetClientOffset()); + + // GetClientOffset returns device pixels; scale back to desktop pixels + // if that's what this widget uses for the Move/Resize APIs + if (BoundsUseDesktopPixels()) { + DesktopPoint desktopOffset = clientOffset / GetDesktopToDeviceScale(); + Move(aOffset.x - desktopOffset.x, aOffset.y - desktopOffset.y); + } else { + LayoutDevicePoint layoutOffset = aOffset * GetDesktopToDeviceScale(); + Move(layoutOffset.x - LayoutDeviceCoord(clientOffset.x), + layoutOffset.y - LayoutDeviceCoord(clientOffset.y)); + } +} + +void nsBaseWidget::ResizeClient(const DesktopSize& aSize, bool aRepaint) { + NS_ASSERTION((aSize.width >= 0), "Negative width passed to ResizeClient"); + NS_ASSERTION((aSize.height >= 0), "Negative height passed to ResizeClient"); + + LayoutDeviceIntRect clientBounds = GetClientBounds(); + + // GetClientBounds and mBounds are device pixels; scale back to desktop pixels + // if that's what this widget uses for the Move/Resize APIs + if (BoundsUseDesktopPixels()) { + DesktopSize desktopDelta = + (LayoutDeviceIntSize(mBounds.Width(), mBounds.Height()) - + clientBounds.Size()) / + GetDesktopToDeviceScale(); + Resize(aSize.width + desktopDelta.width, aSize.height + desktopDelta.height, + aRepaint); + } else { + LayoutDeviceSize layoutSize = aSize * GetDesktopToDeviceScale(); + Resize(mBounds.Width() + (layoutSize.width - clientBounds.Width()), + mBounds.Height() + (layoutSize.height - clientBounds.Height()), + aRepaint); + } +} + +void nsBaseWidget::ResizeClient(const DesktopRect& aRect, bool aRepaint) { + NS_ASSERTION((aRect.Width() >= 0), "Negative width passed to ResizeClient"); + NS_ASSERTION((aRect.Height() >= 0), "Negative height passed to ResizeClient"); + + LayoutDeviceIntRect clientBounds = GetClientBounds(); + LayoutDeviceIntPoint clientOffset = GetClientOffset(); + DesktopToLayoutDeviceScale scale = GetDesktopToDeviceScale(); + + if (BoundsUseDesktopPixels()) { + DesktopPoint desktopOffset = clientOffset / scale; + DesktopSize desktopDelta = + (LayoutDeviceIntSize(mBounds.Width(), mBounds.Height()) - + clientBounds.Size()) / + scale; + Resize(aRect.X() - desktopOffset.x, aRect.Y() - desktopOffset.y, + aRect.Width() + desktopDelta.width, + aRect.Height() + desktopDelta.height, aRepaint); + } else { + LayoutDeviceRect layoutRect = aRect * scale; + Resize(layoutRect.X() - clientOffset.x, layoutRect.Y() - clientOffset.y, + layoutRect.Width() + mBounds.Width() - clientBounds.Width(), + layoutRect.Height() + mBounds.Height() - clientBounds.Height(), + aRepaint); + } +} + +//------------------------------------------------------------------------- +// +// Bounds +// +//------------------------------------------------------------------------- + +/** + * If the implementation of nsWindow supports borders this method MUST be + * overridden + * + **/ +LayoutDeviceIntRect nsBaseWidget::GetClientBounds() { return GetBounds(); } + +/** + * If the implementation of nsWindow supports borders this method MUST be + * overridden + * + **/ +LayoutDeviceIntRect nsBaseWidget::GetBounds() { return mBounds; } + +/** + * If the implementation of nsWindow uses a local coordinate system within the + *window, this method must be overridden + * + **/ +LayoutDeviceIntRect nsBaseWidget::GetScreenBounds() { return GetBounds(); } + +nsresult nsBaseWidget::GetRestoredBounds(LayoutDeviceIntRect& aRect) { + if (SizeMode() != nsSizeMode_Normal) { + return NS_ERROR_FAILURE; + } + aRect = GetScreenBounds(); + return NS_OK; +} + +LayoutDeviceIntPoint nsBaseWidget::GetClientOffset() { + return LayoutDeviceIntPoint(0, 0); +} + +nsresult nsBaseWidget::SetNonClientMargins(LayoutDeviceIntMargin& margins) { + return NS_ERROR_NOT_IMPLEMENTED; +} + +void nsBaseWidget::SetResizeMargin(LayoutDeviceIntCoord aResizeMargin) {} + +uint32_t nsBaseWidget::GetMaxTouchPoints() const { return 0; } + +bool nsBaseWidget::HasPendingInputEvent() { return false; } + +bool nsBaseWidget::ShowsResizeIndicator(LayoutDeviceIntRect* aResizerRect) { + return false; +} + +/** + * Modifies aFile to point at an icon file with the given name and suffix. The + * suffix may correspond to a file extension with leading '.' if appropriate. + * Returns true if the icon file exists and can be read. + */ +static bool ResolveIconNameHelper(nsIFile* aFile, const nsAString& aIconName, + const nsAString& aIconSuffix) { + aFile->Append(u"icons"_ns); + aFile->Append(u"default"_ns); + aFile->Append(aIconName + aIconSuffix); + + bool readable; + return NS_SUCCEEDED(aFile->IsReadable(&readable)) && readable; +} + +/** + * Resolve the given icon name into a local file object. This method is + * intended to be called by subclasses of nsBaseWidget. aIconSuffix is a + * platform specific icon file suffix (e.g., ".ico" under Win32). + * + * If no file is found matching the given parameters, then null is returned. + */ +void nsBaseWidget::ResolveIconName(const nsAString& aIconName, + const nsAString& aIconSuffix, + nsIFile** aResult) { + *aResult = nullptr; + + nsCOMPtr<nsIProperties> dirSvc = + do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID); + if (!dirSvc) return; + + // first check auxilary chrome directories + + nsCOMPtr<nsISimpleEnumerator> dirs; + dirSvc->Get(NS_APP_CHROME_DIR_LIST, NS_GET_IID(nsISimpleEnumerator), + getter_AddRefs(dirs)); + if (dirs) { + bool hasMore; + while (NS_SUCCEEDED(dirs->HasMoreElements(&hasMore)) && hasMore) { + nsCOMPtr<nsISupports> element; + dirs->GetNext(getter_AddRefs(element)); + if (!element) continue; + nsCOMPtr<nsIFile> file = do_QueryInterface(element); + if (!file) continue; + if (ResolveIconNameHelper(file, aIconName, aIconSuffix)) { + NS_ADDREF(*aResult = file); + return; + } + } + } + + // then check the main app chrome directory + + nsCOMPtr<nsIFile> file; + dirSvc->Get(NS_APP_CHROME_DIR, NS_GET_IID(nsIFile), getter_AddRefs(file)); + if (file && ResolveIconNameHelper(file, aIconName, aIconSuffix)) + NS_ADDREF(*aResult = file); +} + +void nsBaseWidget::SetSizeConstraints(const SizeConstraints& aConstraints) { + mSizeConstraints = aConstraints; + + // Popups are constrained during layout, and we don't want to synchronously + // paint from reflow, so bail out... This is not great, but it's no worse than + // what we used to do. + // + // The right fix here is probably making constraint changes go through the + // view manager and such. + if (mWindowType == eWindowType_popup) { + return; + } + + // If the current size doesn't meet the new constraints, trigger a + // resize to apply it. Note that, we don't want to invoke Resize if + // the new constraints don't affect the current size, because Resize + // implementation on some platforms may touch other geometry even if + // the size don't need to change. + LayoutDeviceIntSize curSize = mBounds.Size(); + LayoutDeviceIntSize clampedSize = + Max(aConstraints.mMinSize, Min(aConstraints.mMaxSize, curSize)); + if (clampedSize != curSize) { + gfx::Size size; + if (BoundsUseDesktopPixels()) { + DesktopSize desktopSize = clampedSize / GetDesktopToDeviceScale(); + size = desktopSize.ToUnknownSize(); + } else { + size = gfx::Size(clampedSize.ToUnknownSize()); + } + Resize(size.width, size.height, true); + } +} + +const widget::SizeConstraints nsBaseWidget::GetSizeConstraints() { + return mSizeConstraints; +} + +// static +nsIRollupListener* nsBaseWidget::GetActiveRollupListener() { + // TODO: Simplify this. + return nsXULPopupManager::GetInstance(); +} + +void nsBaseWidget::NotifyWindowDestroyed() { + if (!mWidgetListener) return; + + nsCOMPtr<nsIAppWindow> window = mWidgetListener->GetAppWindow(); + nsCOMPtr<nsIBaseWindow> appWindow(do_QueryInterface(window)); + if (appWindow) { + appWindow->Destroy(); + } +} + +void nsBaseWidget::NotifyWindowMoved(int32_t aX, int32_t aY, + ByMoveToRect aByMoveToRect) { + if (mWidgetListener) { + mWidgetListener->WindowMoved(this, aX, aY, aByMoveToRect); + } + + if (mIMEHasFocus && IMENotificationRequestsRef().WantPositionChanged()) { + NotifyIME(IMENotification(IMEMessage::NOTIFY_IME_OF_POSITION_CHANGE)); + } +} + +void nsBaseWidget::NotifySizeMoveDone() { + if (!mWidgetListener) { + return; + } + if (PresShell* presShell = mWidgetListener->GetPresShell()) { + presShell->WindowSizeMoveDone(); + } +} + +void nsBaseWidget::NotifyThemeChanged(ThemeChangeKind aKind) { + LookAndFeel::NotifyChangedAllWindows(aKind); +} + +nsresult nsBaseWidget::NotifyIME(const IMENotification& aIMENotification) { + if (mIMEHasQuit) { + return NS_OK; + } + switch (aIMENotification.mMessage) { + case REQUEST_TO_COMMIT_COMPOSITION: + case REQUEST_TO_CANCEL_COMPOSITION: + // We should send request to IME only when there is a TextEventDispatcher + // instance (this means that this widget has dispatched at least one + // composition event or keyboard event) and the it has composition. + // Otherwise, there is nothing to do. + // Note that if current input transaction is for native input events, + // TextEventDispatcher::NotifyIME() will call + // TextEventDispatcherListener::NotifyIME(). + if (mTextEventDispatcher && mTextEventDispatcher->IsComposing()) { + return mTextEventDispatcher->NotifyIME(aIMENotification); + } + return NS_OK; + default: { + if (aIMENotification.mMessage == NOTIFY_IME_OF_FOCUS) { + mIMEHasFocus = true; + } + EnsureTextEventDispatcher(); + // TextEventDispatcher::NotifyIME() will always call + // TextEventDispatcherListener::NotifyIME(). I.e., even if current + // input transaction is for synthesized events for automated tests, + // notifications will be sent to native IME. + nsresult rv = mTextEventDispatcher->NotifyIME(aIMENotification); + if (aIMENotification.mMessage == NOTIFY_IME_OF_BLUR) { + mIMEHasFocus = false; + } + return rv; + } + } +} + +void nsBaseWidget::EnsureTextEventDispatcher() { + if (mTextEventDispatcher) { + return; + } + mTextEventDispatcher = new TextEventDispatcher(this); +} + +nsIWidget::NativeIMEContext nsBaseWidget::GetNativeIMEContext() { + if (mTextEventDispatcher && mTextEventDispatcher->GetPseudoIMEContext()) { + // If we already have a TextEventDispatcher and it's working with + // a TextInputProcessor, we need to return pseudo IME context since + // TextCompositionArray::IndexOf(nsIWidget*) should return a composition + // on the pseudo IME context in such case. + NativeIMEContext pseudoIMEContext; + pseudoIMEContext.InitWithRawNativeIMEContext( + mTextEventDispatcher->GetPseudoIMEContext()); + return pseudoIMEContext; + } + return NativeIMEContext(this); +} + +nsIWidget::TextEventDispatcher* nsBaseWidget::GetTextEventDispatcher() { + EnsureTextEventDispatcher(); + return mTextEventDispatcher; +} + +void* nsBaseWidget::GetPseudoIMEContext() { + TextEventDispatcher* dispatcher = GetTextEventDispatcher(); + if (!dispatcher) { + return nullptr; + } + return dispatcher->GetPseudoIMEContext(); +} + +TextEventDispatcherListener* +nsBaseWidget::GetNativeTextEventDispatcherListener() { + // TODO: If all platforms supported use of TextEventDispatcher for handling + // native IME and keyboard events, this method should be removed since + // in such case, this is overridden by all the subclasses. + return nullptr; +} + +void nsBaseWidget::ZoomToRect(const uint32_t& aPresShellId, + const ScrollableLayerGuid::ViewID& aViewId, + const CSSRect& aRect, const uint32_t& aFlags) { + if (!mCompositorSession || !mAPZC) { + return; + } + LayersId layerId = mCompositorSession->RootLayerTreeId(); + mAPZC->ZoomToRect(ScrollableLayerGuid(layerId, aPresShellId, aViewId), + ZoomTarget{aRect}, aFlags); +} + +#ifdef ACCESSIBILITY + +a11y::LocalAccessible* nsBaseWidget::GetRootAccessible() { + NS_ENSURE_TRUE(mWidgetListener, nullptr); + + PresShell* presShell = mWidgetListener->GetPresShell(); + NS_ENSURE_TRUE(presShell, nullptr); + + // If container is null then the presshell is not active. This often happens + // when a preshell is being held onto for fastback. + nsPresContext* presContext = presShell->GetPresContext(); + NS_ENSURE_TRUE(presContext->GetContainerWeak(), nullptr); + + // LocalAccessible creation might be not safe so use IsSafeToRunScript to + // make sure it's not created at unsafe times. + nsAccessibilityService* accService = GetOrCreateAccService(); + if (accService) { + return accService->GetRootDocumentAccessible( + presShell, nsContentUtils::IsSafeToRunScript()); + } + + return nullptr; +} + +#endif // ACCESSIBILITY + +void nsBaseWidget::StartAsyncScrollbarDrag( + const AsyncDragMetrics& aDragMetrics) { + if (!AsyncPanZoomEnabled()) { + return; + } + + MOZ_ASSERT(XRE_IsParentProcess() && mCompositorSession); + + LayersId layersId = mCompositorSession->RootLayerTreeId(); + ScrollableLayerGuid guid(layersId, aDragMetrics.mPresShellId, + aDragMetrics.mViewId); + + mAPZC->StartScrollbarDrag(guid, aDragMetrics); +} + +bool nsBaseWidget::StartAsyncAutoscroll(const ScreenPoint& aAnchorLocation, + const ScrollableLayerGuid& aGuid) { + MOZ_ASSERT(XRE_IsParentProcess() && AsyncPanZoomEnabled()); + + return mAPZC->StartAutoscroll(aGuid, aAnchorLocation); +} + +void nsBaseWidget::StopAsyncAutoscroll(const ScrollableLayerGuid& aGuid) { + MOZ_ASSERT(XRE_IsParentProcess() && AsyncPanZoomEnabled()); + + mAPZC->StopAutoscroll(aGuid); +} + +LayersId nsBaseWidget::GetRootLayerTreeId() { + return mCompositorSession ? mCompositorSession->RootLayerTreeId() + : LayersId{0}; +} + +already_AddRefed<nsIScreen> nsBaseWidget::GetWidgetScreen() { + nsCOMPtr<nsIScreenManager> screenManager; + screenManager = do_GetService("@mozilla.org/gfx/screenmanager;1"); + if (!screenManager) { + return nullptr; + } + + LayoutDeviceIntRect bounds = GetScreenBounds(); + DesktopIntRect deskBounds = RoundedToInt(bounds / GetDesktopToDeviceScale()); + nsCOMPtr<nsIScreen> screen; + screenManager->ScreenForRect(deskBounds.X(), deskBounds.Y(), + deskBounds.Width(), deskBounds.Height(), + getter_AddRefs(screen)); + return screen.forget(); +} + +mozilla::DesktopToLayoutDeviceScale +nsBaseWidget::GetDesktopToDeviceScaleByScreen() { + return (nsView::GetViewFor(this)->GetViewManager()->GetDeviceContext()) + ->GetDesktopToDeviceScale(); +} + +nsresult nsIWidget::SynthesizeNativeTouchTap(LayoutDeviceIntPoint aPoint, + bool aLongTap, + nsIObserver* aObserver) { + AutoObserverNotifier notifier(aObserver, "touchtap"); + + if (sPointerIdCounter > TOUCH_INJECT_MAX_POINTS) { + sPointerIdCounter = 0; + } + int pointerId = sPointerIdCounter; + sPointerIdCounter++; + nsresult rv = SynthesizeNativeTouchPoint(pointerId, TOUCH_CONTACT, aPoint, + 1.0, 90, nullptr); + if (NS_FAILED(rv)) { + return rv; + } + + if (!aLongTap) { + return SynthesizeNativeTouchPoint(pointerId, TOUCH_REMOVE, aPoint, 0, 0, + nullptr); + } + + // initiate a long tap + int elapse = Preferences::GetInt("ui.click_hold_context_menus.delay", + TOUCH_INJECT_LONG_TAP_DEFAULT_MSEC); + if (!mLongTapTimer) { + mLongTapTimer = NS_NewTimer(); + if (!mLongTapTimer) { + SynthesizeNativeTouchPoint(pointerId, TOUCH_CANCEL, aPoint, 0, 0, + nullptr); + return NS_ERROR_UNEXPECTED; + } + // Windows requires recuring events, so we set this to a smaller window + // than the pref value. + int timeout = elapse; + if (timeout > TOUCH_INJECT_PUMP_TIMER_MSEC) { + timeout = TOUCH_INJECT_PUMP_TIMER_MSEC; + } + mLongTapTimer->InitWithNamedFuncCallback( + OnLongTapTimerCallback, this, timeout, nsITimer::TYPE_REPEATING_SLACK, + "nsIWidget::SynthesizeNativeTouchTap"); + } + + // If we already have a long tap pending, cancel it. We only allow one long + // tap to be active at a time. + if (mLongTapTouchPoint) { + SynthesizeNativeTouchPoint(mLongTapTouchPoint->mPointerId, TOUCH_CANCEL, + mLongTapTouchPoint->mPosition, 0, 0, nullptr); + } + + mLongTapTouchPoint = MakeUnique<LongTapInfo>( + pointerId, aPoint, TimeDuration::FromMilliseconds(elapse), aObserver); + notifier.SkipNotification(); // we'll do it in the long-tap callback + return NS_OK; +} + +// static +void nsIWidget::OnLongTapTimerCallback(nsITimer* aTimer, void* aClosure) { + auto* self = static_cast<nsIWidget*>(aClosure); + + if ((self->mLongTapTouchPoint->mStamp + self->mLongTapTouchPoint->mDuration) > + TimeStamp::Now()) { +#ifdef XP_WIN + // Windows needs us to keep pumping feedback to the digitizer, so update + // the pointer id with the same position. + self->SynthesizeNativeTouchPoint( + self->mLongTapTouchPoint->mPointerId, TOUCH_CONTACT, + self->mLongTapTouchPoint->mPosition, 1.0, 90, nullptr); +#endif + return; + } + + AutoObserverNotifier notifier(self->mLongTapTouchPoint->mObserver, + "touchtap"); + + // finished, remove the touch point + self->mLongTapTimer->Cancel(); + self->mLongTapTimer = nullptr; + self->SynthesizeNativeTouchPoint( + self->mLongTapTouchPoint->mPointerId, TOUCH_REMOVE, + self->mLongTapTouchPoint->mPosition, 0, 0, nullptr); + self->mLongTapTouchPoint = nullptr; +} + +float nsIWidget::GetFallbackDPI() { + RefPtr<const Screen> primaryScreen = + ScreenManager::GetSingleton().GetPrimaryScreen(); + return primaryScreen->GetDPI(); +} + +CSSToLayoutDeviceScale nsIWidget::GetFallbackDefaultScale() { + RefPtr<const Screen> s = ScreenManager::GetSingleton().GetPrimaryScreen(); + return s->GetCSSToLayoutDeviceScale(Screen::IncludeOSZoom::No); +} + +nsresult nsIWidget::ClearNativeTouchSequence(nsIObserver* aObserver) { + AutoObserverNotifier notifier(aObserver, "cleartouch"); + + // XXX This is odd. This is called by the constructor of nsIWidget. However, + // at that point, nsIWidget::mLongTapTimer must be nullptr. Therefore, + // this must do nothing at initializing the instance. + if (!mLongTapTimer) { + return NS_OK; + } + mLongTapTimer->Cancel(); + mLongTapTimer = nullptr; + SynthesizeNativeTouchPoint(mLongTapTouchPoint->mPointerId, TOUCH_CANCEL, + mLongTapTouchPoint->mPosition, 0, 0, nullptr); + mLongTapTouchPoint = nullptr; + return NS_OK; +} + +MultiTouchInput nsBaseWidget::UpdateSynthesizedTouchState( + MultiTouchInput* aState, mozilla::TimeStamp aTimeStamp, uint32_t aPointerId, + TouchPointerState aPointerState, LayoutDeviceIntPoint aPoint, + double aPointerPressure, uint32_t aPointerOrientation) { + ScreenIntPoint pointerScreenPoint = ViewAs<ScreenPixel>( + aPoint, PixelCastJustification::LayoutDeviceIsScreenForBounds); + + // We can't dispatch *aState directly because (a) dispatching + // it might inadvertently modify it and (b) in the case of touchend or + // touchcancel events aState will hold the touches that are + // still down whereas the input dispatched needs to hold the removed + // touch(es). We use |inputToDispatch| for this purpose. + MultiTouchInput inputToDispatch; + inputToDispatch.mInputType = MULTITOUCH_INPUT; + inputToDispatch.mTimeStamp = aTimeStamp; + + int32_t index = aState->IndexOfTouch((int32_t)aPointerId); + if (aPointerState == TOUCH_CONTACT) { + if (index >= 0) { + // found an existing touch point, update it + SingleTouchData& point = aState->mTouches[index]; + point.mScreenPoint = pointerScreenPoint; + point.mRotationAngle = (float)aPointerOrientation; + point.mForce = (float)aPointerPressure; + inputToDispatch.mType = MultiTouchInput::MULTITOUCH_MOVE; + } else { + // new touch point, add it + aState->mTouches.AppendElement(SingleTouchData( + (int32_t)aPointerId, pointerScreenPoint, ScreenSize(0, 0), + (float)aPointerOrientation, (float)aPointerPressure)); + inputToDispatch.mType = MultiTouchInput::MULTITOUCH_START; + } + inputToDispatch.mTouches = aState->mTouches; + } else { + MOZ_ASSERT(aPointerState == TOUCH_REMOVE || aPointerState == TOUCH_CANCEL); + // a touch point is being lifted, so remove it from the stored list + if (index >= 0) { + aState->mTouches.RemoveElementAt(index); + } + inputToDispatch.mType = + (aPointerState == TOUCH_REMOVE ? MultiTouchInput::MULTITOUCH_END + : MultiTouchInput::MULTITOUCH_CANCEL); + inputToDispatch.mTouches.AppendElement(SingleTouchData( + (int32_t)aPointerId, pointerScreenPoint, ScreenSize(0, 0), + (float)aPointerOrientation, (float)aPointerPressure)); + } + + return inputToDispatch; +} + +void nsBaseWidget::NotifyLiveResizeStarted() { + // If we have mLiveResizeListeners already non-empty, we should notify those + // listeners that the resize stopped before starting anew. In theory this + // should never happen because we shouldn't get nested live resize actions. + NotifyLiveResizeStopped(); + MOZ_ASSERT(mLiveResizeListeners.IsEmpty()); + + // If we can get the active remote tab for the current widget, suppress + // the displayport on it during the live resize. + if (!mWidgetListener) { + return; + } + nsCOMPtr<nsIAppWindow> appWindow = mWidgetListener->GetAppWindow(); + if (!appWindow) { + return; + } + mLiveResizeListeners = appWindow->GetLiveResizeListeners(); + for (uint32_t i = 0; i < mLiveResizeListeners.Length(); i++) { + mLiveResizeListeners[i]->LiveResizeStarted(); + } +} + +void nsBaseWidget::NotifyLiveResizeStopped() { + if (!mLiveResizeListeners.IsEmpty()) { + for (uint32_t i = 0; i < mLiveResizeListeners.Length(); i++) { + mLiveResizeListeners[i]->LiveResizeStopped(); + } + mLiveResizeListeners.Clear(); + } +} + +nsresult nsBaseWidget::AsyncEnableDragDrop(bool aEnable) { + RefPtr<nsBaseWidget> kungFuDeathGrip = this; + return NS_DispatchToCurrentThreadQueue( + NS_NewRunnableFunction( + "AsyncEnableDragDropFn", + [this, aEnable, kungFuDeathGrip]() { EnableDragDrop(aEnable); }), + kAsyncDragDropTimeout, EventQueuePriority::Idle); +} + +void nsBaseWidget::SwipeFinished() { mSwipeTracker = nullptr; } + +void nsBaseWidget::ReportSwipeStarted(uint64_t aInputBlockId, + bool aStartSwipe) { + if (mSwipeEventQueue && mSwipeEventQueue->inputBlockId == aInputBlockId) { + if (aStartSwipe) { + PanGestureInput& startEvent = mSwipeEventQueue->queuedEvents[0]; + TrackScrollEventAsSwipe(startEvent, mSwipeEventQueue->allowedDirections, + aInputBlockId); + for (size_t i = 1; i < mSwipeEventQueue->queuedEvents.Length(); i++) { + mSwipeTracker->ProcessEvent(mSwipeEventQueue->queuedEvents[i]); + } + } else if (mAPZC) { + // If the event wasn't start swipe, we need to notify it to APZ. + mAPZC->SetBrowserGestureResponse(aInputBlockId, + BrowserGestureResponse::NotConsumed); + } + mSwipeEventQueue = nullptr; + } +} + +void nsBaseWidget::TrackScrollEventAsSwipe( + const mozilla::PanGestureInput& aSwipeStartEvent, + uint32_t aAllowedDirections, uint64_t aInputBlockId) { + // If a swipe is currently being tracked kill it -- it's been interrupted + // by another gesture event. + if (mSwipeTracker) { + mSwipeTracker->CancelSwipe(aSwipeStartEvent.mTimeStamp); + mSwipeTracker->Destroy(); + mSwipeTracker = nullptr; + } + + uint32_t direction = + (aSwipeStartEvent.mPanDisplacement.x > 0.0) + ? (uint32_t)dom::SimpleGestureEvent_Binding::DIRECTION_RIGHT + : (uint32_t)dom::SimpleGestureEvent_Binding::DIRECTION_LEFT; + + mSwipeTracker = + new SwipeTracker(*this, aSwipeStartEvent, aAllowedDirections, direction); + + if (!mAPZC) { + mCurrentPanGestureBelongsToSwipe = true; + } else { + // Now SwipeTracker has started consuming pan events, notify it to APZ so + // that APZ can discard queued events. + mAPZC->SetBrowserGestureResponse(aInputBlockId, + BrowserGestureResponse::Consumed); + } +} + +nsBaseWidget::SwipeInfo nsBaseWidget::SendMayStartSwipe( + const mozilla::PanGestureInput& aSwipeStartEvent) { + nsCOMPtr<nsIWidget> kungFuDeathGrip(this); + + uint32_t direction = + (aSwipeStartEvent.mPanDisplacement.x > 0.0) + ? (uint32_t)dom::SimpleGestureEvent_Binding::DIRECTION_RIGHT + : (uint32_t)dom::SimpleGestureEvent_Binding::DIRECTION_LEFT; + + // We're ready to start the animation. Tell Gecko about it, and at the same + // time ask it if it really wants to start an animation for this event. + // This event also reports back the directions that we can swipe in. + LayoutDeviceIntPoint position = RoundedToInt(aSwipeStartEvent.mPanStartPoint * + ScreenToLayoutDeviceScale(1)); + WidgetSimpleGestureEvent geckoEvent = SwipeTracker::CreateSwipeGestureEvent( + eSwipeGestureMayStart, this, position, aSwipeStartEvent.mTimeStamp); + geckoEvent.mDirection = direction; + geckoEvent.mDelta = 0.0; + geckoEvent.mAllowedDirections = 0; + bool shouldStartSwipe = + DispatchWindowEvent(geckoEvent); // event cancelled == swipe should start + + SwipeInfo result = {shouldStartSwipe, geckoEvent.mAllowedDirections}; + return result; +} + +WidgetWheelEvent nsBaseWidget::MayStartSwipeForAPZ( + const PanGestureInput& aPanInput, const APZEventResult& aApzResult) { + WidgetWheelEvent event = aPanInput.ToWidgetEvent(this); + if (aPanInput.AllowsSwipe()) { + SwipeInfo swipeInfo = SendMayStartSwipe(aPanInput); + event.mCanTriggerSwipe = swipeInfo.wantsSwipe; + if (swipeInfo.wantsSwipe) { + if (aApzResult.GetStatus() == nsEventStatus_eIgnore) { + // APZ has determined and that scrolling horizontally in the + // requested direction is impossible, so it didn't do any + // scrolling for the event. + // We know now that MayStartSwipe wants a swipe, so we can start + // the swipe now. + TrackScrollEventAsSwipe(aPanInput, swipeInfo.allowedDirections, + aApzResult.mInputBlockId); + } else { + // We don't know whether this event can start a swipe, so we need + // to queue up events and wait for a call to ReportSwipeStarted. + // APZ might already have started scrolling in response to the + // event if it knew that it's the right thing to do. In that case + // we'll still get a call to ReportSwipeStarted, and we will + // discard the queued events at that point. + mSwipeEventQueue = MakeUnique<SwipeEventQueue>( + swipeInfo.allowedDirections, aApzResult.mInputBlockId); + } + } else { + // Inform that the browser gesture didn't use the pan event (pan-start + // precisely), so that APZ can now start using the event for + // scrolling/overscrolling. + mAPZC->SetBrowserGestureResponse(aApzResult.mInputBlockId, + BrowserGestureResponse::NotConsumed); + } + } + + if (mSwipeEventQueue && + mSwipeEventQueue->inputBlockId == aApzResult.mInputBlockId) { + mSwipeEventQueue->queuedEvents.AppendElement(aPanInput); + } + + return event; +} + +bool nsBaseWidget::MayStartSwipeForNonAPZ(const PanGestureInput& aPanInput) { + if (aPanInput.mType == PanGestureInput::PANGESTURE_MAYSTART || + aPanInput.mType == PanGestureInput::PANGESTURE_START) { + mCurrentPanGestureBelongsToSwipe = false; + } + if (mCurrentPanGestureBelongsToSwipe) { + // Ignore this event. It's a momentum event from a scroll gesture + // that was processed as a swipe, and the swipe animation has + // already finished (so mSwipeTracker is already null). + MOZ_ASSERT(aPanInput.IsMomentum(), + "If the fingers are still on the touchpad, we should still have " + "a SwipeTracker, " + "and it should have consumed this event."); + return true; + } + + if (!aPanInput.MayTriggerSwipe()) { + return false; + } + + SwipeInfo swipeInfo = SendMayStartSwipe(aPanInput); + + // We're in the non-APZ case here, but we still want to know whether + // the event was routed to a child process, so we use InputAPZContext + // to get that piece of information. + ScrollableLayerGuid guid; + uint64_t blockId = 0; + InputAPZContext context(guid, blockId, nsEventStatus_eIgnore); + + WidgetWheelEvent event = aPanInput.ToWidgetEvent(this); + event.mCanTriggerSwipe = swipeInfo.wantsSwipe; + nsEventStatus status; + DispatchEvent(&event, status); + if (swipeInfo.wantsSwipe) { + if (context.WasRoutedToChildProcess()) { + // We don't know whether this event can start a swipe, so we need + // to queue up events and wait for a call to ReportSwipeStarted. + mSwipeEventQueue = + MakeUnique<SwipeEventQueue>(swipeInfo.allowedDirections, blockId); + } else if (event.TriggersSwipe()) { + TrackScrollEventAsSwipe(aPanInput, swipeInfo.allowedDirections, blockId); + } + } + + if (mSwipeEventQueue && mSwipeEventQueue->inputBlockId == 0) { + mSwipeEventQueue->queuedEvents.AppendElement(aPanInput); + } + + return true; +} + +const IMENotificationRequests& nsIWidget::IMENotificationRequestsRef() { + TextEventDispatcher* dispatcher = GetTextEventDispatcher(); + return dispatcher->IMENotificationRequestsRef(); +} + +void nsIWidget::PostHandleKeyEvent(mozilla::WidgetKeyboardEvent* aEvent) {} + +bool nsIWidget::GetEditCommands(NativeKeyBindingsType aType, + const WidgetKeyboardEvent& aEvent, + nsTArray<CommandInt>& aCommands) { + MOZ_ASSERT(aEvent.IsTrusted()); + MOZ_ASSERT(aCommands.IsEmpty()); + return true; +} + +already_AddRefed<nsIBidiKeyboard> nsIWidget::CreateBidiKeyboard() { + if (XRE_IsContentProcess()) { + return CreateBidiKeyboardContentProcess(); + } + return CreateBidiKeyboardInner(); +} + +#ifdef ANDROID +already_AddRefed<nsIBidiKeyboard> nsIWidget::CreateBidiKeyboardInner() { + // no bidi keyboard implementation + return nullptr; +} +#endif + +namespace mozilla::widget { + +const char* ToChar(InputContext::Origin aOrigin) { + switch (aOrigin) { + case InputContext::ORIGIN_MAIN: + return "ORIGIN_MAIN"; + case InputContext::ORIGIN_CONTENT: + return "ORIGIN_CONTENT"; + default: + return "Unexpected value"; + } +} + +const char* ToChar(IMEMessage aIMEMessage) { + switch (aIMEMessage) { + case NOTIFY_IME_OF_NOTHING: + return "NOTIFY_IME_OF_NOTHING"; + case NOTIFY_IME_OF_FOCUS: + return "NOTIFY_IME_OF_FOCUS"; + case NOTIFY_IME_OF_BLUR: + return "NOTIFY_IME_OF_BLUR"; + case NOTIFY_IME_OF_SELECTION_CHANGE: + return "NOTIFY_IME_OF_SELECTION_CHANGE"; + case NOTIFY_IME_OF_TEXT_CHANGE: + return "NOTIFY_IME_OF_TEXT_CHANGE"; + case NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED: + return "NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED"; + case NOTIFY_IME_OF_POSITION_CHANGE: + return "NOTIFY_IME_OF_POSITION_CHANGE"; + case NOTIFY_IME_OF_MOUSE_BUTTON_EVENT: + return "NOTIFY_IME_OF_MOUSE_BUTTON_EVENT"; + case REQUEST_TO_COMMIT_COMPOSITION: + return "REQUEST_TO_COMMIT_COMPOSITION"; + case REQUEST_TO_CANCEL_COMPOSITION: + return "REQUEST_TO_CANCEL_COMPOSITION"; + default: + return "Unexpected value"; + } +} + +void NativeIMEContext::Init(nsIWidget* aWidget) { + if (!aWidget) { + mRawNativeIMEContext = reinterpret_cast<uintptr_t>(nullptr); + mOriginProcessID = static_cast<uint64_t>(-1); + return; + } + if (!XRE_IsContentProcess()) { + mRawNativeIMEContext = reinterpret_cast<uintptr_t>( + aWidget->GetNativeData(NS_RAW_NATIVE_IME_CONTEXT)); + mOriginProcessID = 0; + return; + } + // If this is created in a child process, aWidget is an instance of + // PuppetWidget which doesn't support NS_RAW_NATIVE_IME_CONTEXT. + // Instead of that PuppetWidget::GetNativeIMEContext() returns cached + // native IME context of the parent process. + *this = aWidget->GetNativeIMEContext(); +} + +void NativeIMEContext::InitWithRawNativeIMEContext(void* aRawNativeIMEContext) { + if (NS_WARN_IF(!aRawNativeIMEContext)) { + mRawNativeIMEContext = reinterpret_cast<uintptr_t>(nullptr); + mOriginProcessID = static_cast<uint64_t>(-1); + return; + } + mRawNativeIMEContext = reinterpret_cast<uintptr_t>(aRawNativeIMEContext); + mOriginProcessID = + XRE_IsContentProcess() ? ContentChild::GetSingleton()->GetID() : 0; +} + +void IMENotification::TextChangeDataBase::MergeWith( + const IMENotification::TextChangeDataBase& aOther) { + MOZ_ASSERT(aOther.IsValid(), "Merging data must store valid data"); + MOZ_ASSERT(aOther.mStartOffset <= aOther.mRemovedEndOffset, + "end of removed text must be same or larger than start"); + MOZ_ASSERT(aOther.mStartOffset <= aOther.mAddedEndOffset, + "end of added text must be same or larger than start"); + + if (!IsValid()) { + *this = aOther; + return; + } + + // |mStartOffset| and |mRemovedEndOffset| represent all replaced or removed + // text ranges. I.e., mStartOffset should be the smallest offset of all + // modified text ranges in old text. |mRemovedEndOffset| should be the + // largest end offset in old text of all modified text ranges. + // |mAddedEndOffset| represents the end offset of all inserted text ranges. + // I.e., only this is an offset in new text. + // In other words, between mStartOffset and |mRemovedEndOffset| of the + // premodified text was already removed. And some text whose length is + // |mAddedEndOffset - mStartOffset| is inserted to |mStartOffset|. I.e., + // this allows IME to mark dirty the modified text range with |mStartOffset| + // and |mRemovedEndOffset| if IME stores all text of the focused editor and + // to compute new text length with |mAddedEndOffset| and |mRemovedEndOffset|. + // Additionally, IME can retrieve only the text between |mStartOffset| and + // |mAddedEndOffset| for updating stored text. + + // For comparing new and old |mStartOffset|/|mRemovedEndOffset| values, they + // should be adjusted to be in same text. The |newData.mStartOffset| and + // |newData.mRemovedEndOffset| should be computed as in old text because + // |mStartOffset| and |mRemovedEndOffset| represent the modified text range + // in the old text but even if some text before the values of the newData + // has already been modified, the values don't include the changes. + + // For comparing new and old |mAddedEndOffset| values, they should be + // adjusted to be in same text. The |oldData.mAddedEndOffset| should be + // computed as in the new text because |mAddedEndOffset| indicates the end + // offset of inserted text in the new text but |oldData.mAddedEndOffset| + // doesn't include any changes of the text before |newData.mAddedEndOffset|. + + const TextChangeDataBase& newData = aOther; + const TextChangeDataBase oldData = *this; + + // mCausedOnlyByComposition should be true only when all changes are caused + // by composition. + mCausedOnlyByComposition = + newData.mCausedOnlyByComposition && oldData.mCausedOnlyByComposition; + + // mIncludingChangesWithoutComposition should be true if at least one of + // merged changes occurred without composition. + mIncludingChangesWithoutComposition = + newData.mIncludingChangesWithoutComposition || + oldData.mIncludingChangesWithoutComposition; + + // mIncludingChangesDuringComposition should be true when at least one of + // the merged non-composition changes occurred during the latest composition. + if (!newData.mCausedOnlyByComposition && + !newData.mIncludingChangesDuringComposition) { + MOZ_ASSERT(newData.mIncludingChangesWithoutComposition); + MOZ_ASSERT(mIncludingChangesWithoutComposition); + // If new change is neither caused by composition nor occurred during + // composition, set mIncludingChangesDuringComposition to false because + // IME doesn't want outdated text changes as text change during current + // composition. + mIncludingChangesDuringComposition = false; + } else { + // Otherwise, set mIncludingChangesDuringComposition to true if either + // oldData or newData includes changes during composition. + mIncludingChangesDuringComposition = + newData.mIncludingChangesDuringComposition || + oldData.mIncludingChangesDuringComposition; + } + + if (newData.mStartOffset >= oldData.mAddedEndOffset) { + // Case 1: + // If new start is after old end offset of added text, it means that text + // after the modified range is modified. Like: + // added range of old change: +----------+ + // removed range of new change: +----------+ + // So, the old start offset is always the smaller offset. + mStartOffset = oldData.mStartOffset; + // The new end offset of removed text is moved by the old change and we + // need to cancel the move of the old change for comparing the offsets in + // same text because it doesn't make sensce to compare offsets in different + // text. + uint32_t newRemovedEndOffsetInOldText = + newData.mRemovedEndOffset - oldData.Difference(); + mRemovedEndOffset = + std::max(newRemovedEndOffsetInOldText, oldData.mRemovedEndOffset); + // The new end offset of added text is always the larger offset. + mAddedEndOffset = newData.mAddedEndOffset; + return; + } + + if (newData.mStartOffset >= oldData.mStartOffset) { + // If new start is in the modified range, it means that new data changes + // a part or all of the range. + mStartOffset = oldData.mStartOffset; + if (newData.mRemovedEndOffset >= oldData.mAddedEndOffset) { + // Case 2: + // If new end of removed text is greater than old end of added text, it + // means that all or a part of modified range modified again and text + // after the modified range is also modified. Like: + // added range of old change: +----------+ + // removed range of new change: +----------+ + // So, the new removed end offset is moved by the old change and we need + // to cancel the move of the old change for comparing the offsets in the + // same text because it doesn't make sense to compare the offsets in + // different text. + uint32_t newRemovedEndOffsetInOldText = + newData.mRemovedEndOffset - oldData.Difference(); + mRemovedEndOffset = + std::max(newRemovedEndOffsetInOldText, oldData.mRemovedEndOffset); + // The old end of added text is replaced by new change. So, it should be + // same as the new start. On the other hand, the new added end offset is + // always same or larger. Therefore, the merged end offset of added + // text should be the new end offset of added text. + mAddedEndOffset = newData.mAddedEndOffset; + return; + } + + // Case 3: + // If new end of removed text is less than old end of added text, it means + // that only a part of the modified range is modified again. Like: + // added range of old change: +------------+ + // removed range of new change: +-----+ + // So, the new end offset of removed text should be same as the old end + // offset of removed text. Therefore, the merged end offset of removed + // text should be the old text change's |mRemovedEndOffset|. + mRemovedEndOffset = oldData.mRemovedEndOffset; + // The old end of added text is moved by new change. So, we need to cancel + // the move of the new change for comparing the offsets in same text. + uint32_t oldAddedEndOffsetInNewText = + oldData.mAddedEndOffset + newData.Difference(); + mAddedEndOffset = + std::max(newData.mAddedEndOffset, oldAddedEndOffsetInNewText); + return; + } + + if (newData.mRemovedEndOffset >= oldData.mStartOffset) { + // If new end of removed text is greater than old start (and new start is + // less than old start), it means that a part of modified range is modified + // again and some new text before the modified range is also modified. + MOZ_ASSERT(newData.mStartOffset < oldData.mStartOffset, + "new start offset should be less than old one here"); + mStartOffset = newData.mStartOffset; + if (newData.mRemovedEndOffset >= oldData.mAddedEndOffset) { + // Case 4: + // If new end of removed text is greater than old end of added text, it + // means that all modified text and text after the modified range is + // modified. Like: + // added range of old change: +----------+ + // removed range of new change: +------------------+ + // So, the new end of removed text is moved by the old change. Therefore, + // we need to cancel the move of the old change for comparing the offsets + // in same text because it doesn't make sense to compare the offsets in + // different text. + uint32_t newRemovedEndOffsetInOldText = + newData.mRemovedEndOffset - oldData.Difference(); + mRemovedEndOffset = + std::max(newRemovedEndOffsetInOldText, oldData.mRemovedEndOffset); + // The old end of added text is replaced by new change. So, the old end + // offset of added text is same as new text change's start offset. Then, + // new change's end offset of added text is always same or larger than + // it. Therefore, merged end offset of added text is always the new end + // offset of added text. + mAddedEndOffset = newData.mAddedEndOffset; + return; + } + + // Case 5: + // If new end of removed text is less than old end of added text, it + // means that only a part of the modified range is modified again. Like: + // added range of old change: +----------+ + // removed range of new change: +----------+ + // So, the new end of removed text should be same as old end of removed + // text for preventing end of removed text to be modified. Therefore, + // merged end offset of removed text is always the old end offset of removed + // text. + mRemovedEndOffset = oldData.mRemovedEndOffset; + // The old end of added text is moved by this change. So, we need to + // cancel the move of the new change for comparing the offsets in same text + // because it doesn't make sense to compare the offsets in different text. + uint32_t oldAddedEndOffsetInNewText = + oldData.mAddedEndOffset + newData.Difference(); + mAddedEndOffset = + std::max(newData.mAddedEndOffset, oldAddedEndOffsetInNewText); + return; + } + + // Case 6: + // Otherwise, i.e., both new end of added text and new start are less than + // old start, text before the modified range is modified. Like: + // added range of old change: +----------+ + // removed range of new change: +----------+ + MOZ_ASSERT(newData.mStartOffset < oldData.mStartOffset, + "new start offset should be less than old one here"); + mStartOffset = newData.mStartOffset; + MOZ_ASSERT(newData.mRemovedEndOffset < oldData.mRemovedEndOffset, + "new removed end offset should be less than old one here"); + mRemovedEndOffset = oldData.mRemovedEndOffset; + // The end of added text should be adjusted with the new difference. + uint32_t oldAddedEndOffsetInNewText = + oldData.mAddedEndOffset + newData.Difference(); + mAddedEndOffset = + std::max(newData.mAddedEndOffset, oldAddedEndOffsetInNewText); +} + +#ifdef DEBUG + +// Let's test the code of merging multiple text change data in debug build +// and crash if one of them fails because this feature is very complex but +// cannot be tested with mochitest. +void IMENotification::TextChangeDataBase::Test() { + static bool gTestTextChangeEvent = true; + if (!gTestTextChangeEvent) { + return; + } + gTestTextChangeEvent = false; + + /**************************************************************************** + * Case 1 + ****************************************************************************/ + + // Appending text + MergeWith(TextChangeData(10, 10, 20, false, false)); + MergeWith(TextChangeData(20, 20, 35, false, false)); + MOZ_ASSERT(mStartOffset == 10, + "Test 1-1-1: mStartOffset should be the first offset"); + MOZ_ASSERT( + mRemovedEndOffset == 10, // 20 - (20 - 10) + "Test 1-1-2: mRemovedEndOffset should be the first end of removed text"); + MOZ_ASSERT( + mAddedEndOffset == 35, + "Test 1-1-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Removing text (longer line -> shorter line) + MergeWith(TextChangeData(10, 20, 10, false, false)); + MergeWith(TextChangeData(10, 30, 10, false, false)); + MOZ_ASSERT(mStartOffset == 10, + "Test 1-2-1: mStartOffset should be the first offset"); + MOZ_ASSERT(mRemovedEndOffset == 40, // 30 + (10 - 20) + "Test 1-2-2: mRemovedEndOffset should be the the last end of " + "removed text " + "with already removed length"); + MOZ_ASSERT( + mAddedEndOffset == 10, + "Test 1-2-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Removing text (shorter line -> longer line) + MergeWith(TextChangeData(10, 20, 10, false, false)); + MergeWith(TextChangeData(10, 15, 10, false, false)); + MOZ_ASSERT(mStartOffset == 10, + "Test 1-3-1: mStartOffset should be the first offset"); + MOZ_ASSERT(mRemovedEndOffset == 25, // 15 + (10 - 20) + "Test 1-3-2: mRemovedEndOffset should be the the last end of " + "removed text " + "with already removed length"); + MOZ_ASSERT( + mAddedEndOffset == 10, + "Test 1-3-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Appending text at different point (not sure if actually occurs) + MergeWith(TextChangeData(10, 10, 20, false, false)); + MergeWith(TextChangeData(55, 55, 60, false, false)); + MOZ_ASSERT(mStartOffset == 10, + "Test 1-4-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 45, // 55 - (10 - 20) + "Test 1-4-2: mRemovedEndOffset should be the the largest end of removed " + "text without already added length"); + MOZ_ASSERT( + mAddedEndOffset == 60, + "Test 1-4-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Removing text at different point (not sure if actually occurs) + MergeWith(TextChangeData(10, 20, 10, false, false)); + MergeWith(TextChangeData(55, 68, 55, false, false)); + MOZ_ASSERT(mStartOffset == 10, + "Test 1-5-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 78, // 68 - (10 - 20) + "Test 1-5-2: mRemovedEndOffset should be the the largest end of removed " + "text with already removed length"); + MOZ_ASSERT( + mAddedEndOffset == 55, + "Test 1-5-3: mAddedEndOffset should be the largest end of added text"); + Clear(); + + // Replacing text and append text (becomes longer) + MergeWith(TextChangeData(30, 35, 32, false, false)); + MergeWith(TextChangeData(32, 32, 40, false, false)); + MOZ_ASSERT(mStartOffset == 30, + "Test 1-6-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 35, // 32 - (32 - 35) + "Test 1-6-2: mRemovedEndOffset should be the the first end of removed " + "text"); + MOZ_ASSERT( + mAddedEndOffset == 40, + "Test 1-6-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Replacing text and append text (becomes shorter) + MergeWith(TextChangeData(30, 35, 32, false, false)); + MergeWith(TextChangeData(32, 32, 33, false, false)); + MOZ_ASSERT(mStartOffset == 30, + "Test 1-7-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 35, // 32 - (32 - 35) + "Test 1-7-2: mRemovedEndOffset should be the the first end of removed " + "text"); + MOZ_ASSERT( + mAddedEndOffset == 33, + "Test 1-7-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Removing text and replacing text after first range (not sure if actually + // occurs) + MergeWith(TextChangeData(30, 35, 30, false, false)); + MergeWith(TextChangeData(32, 34, 48, false, false)); + MOZ_ASSERT(mStartOffset == 30, + "Test 1-8-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 39, // 34 - (30 - 35) + "Test 1-8-2: mRemovedEndOffset should be the the first end of " + "removed text " + "without already removed text"); + MOZ_ASSERT( + mAddedEndOffset == 48, + "Test 1-8-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Removing text and replacing text after first range (not sure if actually + // occurs) + MergeWith(TextChangeData(30, 35, 30, false, false)); + MergeWith(TextChangeData(32, 38, 36, false, false)); + MOZ_ASSERT(mStartOffset == 30, + "Test 1-9-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 43, // 38 - (30 - 35) + "Test 1-9-2: mRemovedEndOffset should be the the first end of " + "removed text " + "without already removed text"); + MOZ_ASSERT( + mAddedEndOffset == 36, + "Test 1-9-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + /**************************************************************************** + * Case 2 + ****************************************************************************/ + + // Replacing text in around end of added text (becomes shorter) (not sure + // if actually occurs) + MergeWith(TextChangeData(50, 50, 55, false, false)); + MergeWith(TextChangeData(53, 60, 54, false, false)); + MOZ_ASSERT(mStartOffset == 50, + "Test 2-1-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 55, // 60 - (55 - 50) + "Test 2-1-2: mRemovedEndOffset should be the the last end of " + "removed text " + "without already added text length"); + MOZ_ASSERT( + mAddedEndOffset == 54, + "Test 2-1-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Replacing text around end of added text (becomes longer) (not sure + // if actually occurs) + MergeWith(TextChangeData(50, 50, 55, false, false)); + MergeWith(TextChangeData(54, 62, 68, false, false)); + MOZ_ASSERT(mStartOffset == 50, + "Test 2-2-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 57, // 62 - (55 - 50) + "Test 2-2-2: mRemovedEndOffset should be the the last end of " + "removed text " + "without already added text length"); + MOZ_ASSERT( + mAddedEndOffset == 68, + "Test 2-2-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Replacing text around end of replaced text (became shorter) (not sure if + // actually occurs) + MergeWith(TextChangeData(36, 48, 45, false, false)); + MergeWith(TextChangeData(43, 50, 49, false, false)); + MOZ_ASSERT(mStartOffset == 36, + "Test 2-3-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 53, // 50 - (45 - 48) + "Test 2-3-2: mRemovedEndOffset should be the the last end of " + "removed text " + "without already removed text length"); + MOZ_ASSERT( + mAddedEndOffset == 49, + "Test 2-3-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Replacing text around end of replaced text (became longer) (not sure if + // actually occurs) + MergeWith(TextChangeData(36, 52, 53, false, false)); + MergeWith(TextChangeData(43, 68, 61, false, false)); + MOZ_ASSERT(mStartOffset == 36, + "Test 2-4-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 67, // 68 - (53 - 52) + "Test 2-4-2: mRemovedEndOffset should be the the last end of " + "removed text " + "without already added text length"); + MOZ_ASSERT( + mAddedEndOffset == 61, + "Test 2-4-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + /**************************************************************************** + * Case 3 + ****************************************************************************/ + + // Appending text in already added text (not sure if actually occurs) + MergeWith(TextChangeData(10, 10, 20, false, false)); + MergeWith(TextChangeData(15, 15, 30, false, false)); + MOZ_ASSERT(mStartOffset == 10, + "Test 3-1-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 10, + "Test 3-1-2: mRemovedEndOffset should be the the first end of " + "removed text"); + MOZ_ASSERT( + mAddedEndOffset == 35, // 20 + (30 - 15) + "Test 3-1-3: mAddedEndOffset should be the first end of added text with " + "added text length by the new change"); + Clear(); + + // Replacing text in added text (not sure if actually occurs) + MergeWith(TextChangeData(50, 50, 55, false, false)); + MergeWith(TextChangeData(52, 53, 56, false, false)); + MOZ_ASSERT(mStartOffset == 50, + "Test 3-2-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 50, + "Test 3-2-2: mRemovedEndOffset should be the the first end of " + "removed text"); + MOZ_ASSERT( + mAddedEndOffset == 58, // 55 + (56 - 53) + "Test 3-2-3: mAddedEndOffset should be the first end of added text with " + "added text length by the new change"); + Clear(); + + // Replacing text in replaced text (became shorter) (not sure if actually + // occurs) + MergeWith(TextChangeData(36, 48, 45, false, false)); + MergeWith(TextChangeData(37, 38, 50, false, false)); + MOZ_ASSERT(mStartOffset == 36, + "Test 3-3-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 48, + "Test 3-3-2: mRemovedEndOffset should be the the first end of " + "removed text"); + MOZ_ASSERT( + mAddedEndOffset == 57, // 45 + (50 - 38) + "Test 3-3-3: mAddedEndOffset should be the first end of added text with " + "added text length by the new change"); + Clear(); + + // Replacing text in replaced text (became longer) (not sure if actually + // occurs) + MergeWith(TextChangeData(32, 48, 53, false, false)); + MergeWith(TextChangeData(43, 50, 52, false, false)); + MOZ_ASSERT(mStartOffset == 32, + "Test 3-4-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 48, + "Test 3-4-2: mRemovedEndOffset should be the the last end of " + "removed text " + "without already added text length"); + MOZ_ASSERT( + mAddedEndOffset == 55, // 53 + (52 - 50) + "Test 3-4-3: mAddedEndOffset should be the first end of added text with " + "added text length by the new change"); + Clear(); + + // Replacing text in replaced text (became shorter) (not sure if actually + // occurs) + MergeWith(TextChangeData(36, 48, 50, false, false)); + MergeWith(TextChangeData(37, 49, 47, false, false)); + MOZ_ASSERT(mStartOffset == 36, + "Test 3-5-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 48, + "Test 3-5-2: mRemovedEndOffset should be the the first end of removed " + "text"); + MOZ_ASSERT(mAddedEndOffset == 48, // 50 + (47 - 49) + "Test 3-5-3: mAddedEndOffset should be the first end of added " + "text without " + "removed text length by the new change"); + Clear(); + + // Replacing text in replaced text (became longer) (not sure if actually + // occurs) + MergeWith(TextChangeData(32, 48, 53, false, false)); + MergeWith(TextChangeData(43, 50, 47, false, false)); + MOZ_ASSERT(mStartOffset == 32, + "Test 3-6-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 48, + "Test 3-6-2: mRemovedEndOffset should be the the last end of " + "removed text " + "without already added text length"); + MOZ_ASSERT(mAddedEndOffset == 50, // 53 + (47 - 50) + "Test 3-6-3: mAddedEndOffset should be the first end of added " + "text without " + "removed text length by the new change"); + Clear(); + + /**************************************************************************** + * Case 4 + ****************************************************************************/ + + // Replacing text all of already append text (not sure if actually occurs) + MergeWith(TextChangeData(50, 50, 55, false, false)); + MergeWith(TextChangeData(44, 66, 68, false, false)); + MOZ_ASSERT(mStartOffset == 44, + "Test 4-1-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 61, // 66 - (55 - 50) + "Test 4-1-2: mRemovedEndOffset should be the the last end of " + "removed text " + "without already added text length"); + MOZ_ASSERT( + mAddedEndOffset == 68, + "Test 4-1-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Replacing text around a point in which text was removed (not sure if + // actually occurs) + MergeWith(TextChangeData(50, 62, 50, false, false)); + MergeWith(TextChangeData(44, 66, 68, false, false)); + MOZ_ASSERT(mStartOffset == 44, + "Test 4-2-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 78, // 66 - (50 - 62) + "Test 4-2-2: mRemovedEndOffset should be the the last end of " + "removed text " + "without already removed text length"); + MOZ_ASSERT( + mAddedEndOffset == 68, + "Test 4-2-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Replacing text all replaced text (became shorter) (not sure if actually + // occurs) + MergeWith(TextChangeData(50, 62, 60, false, false)); + MergeWith(TextChangeData(49, 128, 130, false, false)); + MOZ_ASSERT(mStartOffset == 49, + "Test 4-3-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 130, // 128 - (60 - 62) + "Test 4-3-2: mRemovedEndOffset should be the the last end of " + "removed text " + "without already removed text length"); + MOZ_ASSERT( + mAddedEndOffset == 130, + "Test 4-3-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + // Replacing text all replaced text (became longer) (not sure if actually + // occurs) + MergeWith(TextChangeData(50, 61, 73, false, false)); + MergeWith(TextChangeData(44, 100, 50, false, false)); + MOZ_ASSERT(mStartOffset == 44, + "Test 4-4-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT(mRemovedEndOffset == 88, // 100 - (73 - 61) + "Test 4-4-2: mRemovedEndOffset should be the the last end of " + "removed text " + "with already added text length"); + MOZ_ASSERT( + mAddedEndOffset == 50, + "Test 4-4-3: mAddedEndOffset should be the last end of added text"); + Clear(); + + /**************************************************************************** + * Case 5 + ****************************************************************************/ + + // Replacing text around start of added text (not sure if actually occurs) + MergeWith(TextChangeData(50, 50, 55, false, false)); + MergeWith(TextChangeData(48, 52, 49, false, false)); + MOZ_ASSERT(mStartOffset == 48, + "Test 5-1-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 50, + "Test 5-1-2: mRemovedEndOffset should be the the first end of removed " + "text"); + MOZ_ASSERT( + mAddedEndOffset == 52, // 55 + (52 - 49) + "Test 5-1-3: mAddedEndOffset should be the first end of added text with " + "added text length by the new change"); + Clear(); + + // Replacing text around start of replaced text (became shorter) (not sure if + // actually occurs) + MergeWith(TextChangeData(50, 60, 58, false, false)); + MergeWith(TextChangeData(43, 50, 48, false, false)); + MOZ_ASSERT(mStartOffset == 43, + "Test 5-2-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 60, + "Test 5-2-2: mRemovedEndOffset should be the the first end of removed " + "text"); + MOZ_ASSERT(mAddedEndOffset == 56, // 58 + (48 - 50) + "Test 5-2-3: mAddedEndOffset should be the first end of added " + "text without " + "removed text length by the new change"); + Clear(); + + // Replacing text around start of replaced text (became longer) (not sure if + // actually occurs) + MergeWith(TextChangeData(50, 60, 68, false, false)); + MergeWith(TextChangeData(43, 55, 53, false, false)); + MOZ_ASSERT(mStartOffset == 43, + "Test 5-3-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 60, + "Test 5-3-2: mRemovedEndOffset should be the the first end of removed " + "text"); + MOZ_ASSERT(mAddedEndOffset == 66, // 68 + (53 - 55) + "Test 5-3-3: mAddedEndOffset should be the first end of added " + "text without " + "removed text length by the new change"); + Clear(); + + // Replacing text around start of replaced text (became shorter) (not sure if + // actually occurs) + MergeWith(TextChangeData(50, 60, 58, false, false)); + MergeWith(TextChangeData(43, 50, 128, false, false)); + MOZ_ASSERT(mStartOffset == 43, + "Test 5-4-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 60, + "Test 5-4-2: mRemovedEndOffset should be the the first end of removed " + "text"); + MOZ_ASSERT( + mAddedEndOffset == 136, // 58 + (128 - 50) + "Test 5-4-3: mAddedEndOffset should be the first end of added text with " + "added text length by the new change"); + Clear(); + + // Replacing text around start of replaced text (became longer) (not sure if + // actually occurs) + MergeWith(TextChangeData(50, 60, 68, false, false)); + MergeWith(TextChangeData(43, 55, 65, false, false)); + MOZ_ASSERT(mStartOffset == 43, + "Test 5-5-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 60, + "Test 5-5-2: mRemovedEndOffset should be the the first end of removed " + "text"); + MOZ_ASSERT( + mAddedEndOffset == 78, // 68 + (65 - 55) + "Test 5-5-3: mAddedEndOffset should be the first end of added text with " + "added text length by the new change"); + Clear(); + + /**************************************************************************** + * Case 6 + ****************************************************************************/ + + // Appending text before already added text (not sure if actually occurs) + MergeWith(TextChangeData(30, 30, 45, false, false)); + MergeWith(TextChangeData(10, 10, 20, false, false)); + MOZ_ASSERT(mStartOffset == 10, + "Test 6-1-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 30, + "Test 6-1-2: mRemovedEndOffset should be the the largest end of removed " + "text"); + MOZ_ASSERT( + mAddedEndOffset == 55, // 45 + (20 - 10) + "Test 6-1-3: mAddedEndOffset should be the first end of added text with " + "added text length by the new change"); + Clear(); + + // Removing text before already removed text (not sure if actually occurs) + MergeWith(TextChangeData(30, 35, 30, false, false)); + MergeWith(TextChangeData(10, 25, 10, false, false)); + MOZ_ASSERT(mStartOffset == 10, + "Test 6-2-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 35, + "Test 6-2-2: mRemovedEndOffset should be the the largest end of removed " + "text"); + MOZ_ASSERT( + mAddedEndOffset == 15, // 30 - (25 - 10) + "Test 6-2-3: mAddedEndOffset should be the first end of added text with " + "removed text length by the new change"); + Clear(); + + // Replacing text before already replaced text (not sure if actually occurs) + MergeWith(TextChangeData(50, 65, 70, false, false)); + MergeWith(TextChangeData(13, 24, 15, false, false)); + MOZ_ASSERT(mStartOffset == 13, + "Test 6-3-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 65, + "Test 6-3-2: mRemovedEndOffset should be the the largest end of removed " + "text"); + MOZ_ASSERT(mAddedEndOffset == 61, // 70 + (15 - 24) + "Test 6-3-3: mAddedEndOffset should be the first end of added " + "text without " + "removed text length by the new change"); + Clear(); + + // Replacing text before already replaced text (not sure if actually occurs) + MergeWith(TextChangeData(50, 65, 70, false, false)); + MergeWith(TextChangeData(13, 24, 36, false, false)); + MOZ_ASSERT(mStartOffset == 13, + "Test 6-4-1: mStartOffset should be the smallest offset"); + MOZ_ASSERT( + mRemovedEndOffset == 65, + "Test 6-4-2: mRemovedEndOffset should be the the largest end of removed " + "text"); + MOZ_ASSERT(mAddedEndOffset == 82, // 70 + (36 - 24) + "Test 6-4-3: mAddedEndOffset should be the first end of added " + "text without " + "removed text length by the new change"); + Clear(); +} + +#endif // #ifdef DEBUG + +} // namespace mozilla::widget + +#ifdef DEBUG +////////////////////////////////////////////////////////////// +// +// Convert a GUI event message code to a string. +// Makes it a lot easier to debug events. +// +// See gtk/nsWidget.cpp and windows/nsWindow.cpp +// for a DebugPrintEvent() function that uses +// this. +// +////////////////////////////////////////////////////////////// +/* static */ +nsAutoString nsBaseWidget::debug_GuiEventToString(WidgetGUIEvent* aGuiEvent) { + NS_ASSERTION(nullptr != aGuiEvent, "cmon, null gui event."); + + nsAutoString eventName(u"UNKNOWN"_ns); + +# define _ASSIGN_eventName(_value, _name) \ + case _value: \ + eventName.AssignLiteral(_name); \ + break + + switch (aGuiEvent->mMessage) { + _ASSIGN_eventName(eBlur, "eBlur"); + _ASSIGN_eventName(eDrop, "eDrop"); + _ASSIGN_eventName(eDragEnter, "eDragEnter"); + _ASSIGN_eventName(eDragExit, "eDragExit"); + _ASSIGN_eventName(eDragOver, "eDragOver"); + _ASSIGN_eventName(eEditorInput, "eEditorInput"); + _ASSIGN_eventName(eFocus, "eFocus"); + _ASSIGN_eventName(eFocusIn, "eFocusIn"); + _ASSIGN_eventName(eFocusOut, "eFocusOut"); + _ASSIGN_eventName(eFormSelect, "eFormSelect"); + _ASSIGN_eventName(eFormChange, "eFormChange"); + _ASSIGN_eventName(eFormReset, "eFormReset"); + _ASSIGN_eventName(eFormSubmit, "eFormSubmit"); + _ASSIGN_eventName(eImageAbort, "eImageAbort"); + _ASSIGN_eventName(eLoadError, "eLoadError"); + _ASSIGN_eventName(eKeyDown, "eKeyDown"); + _ASSIGN_eventName(eKeyPress, "eKeyPress"); + _ASSIGN_eventName(eKeyUp, "eKeyUp"); + _ASSIGN_eventName(eMouseEnterIntoWidget, "eMouseEnterIntoWidget"); + _ASSIGN_eventName(eMouseExitFromWidget, "eMouseExitFromWidget"); + _ASSIGN_eventName(eMouseDown, "eMouseDown"); + _ASSIGN_eventName(eMouseUp, "eMouseUp"); + _ASSIGN_eventName(eMouseClick, "eMouseClick"); + _ASSIGN_eventName(eMouseAuxClick, "eMouseAuxClick"); + _ASSIGN_eventName(eMouseDoubleClick, "eMouseDoubleClick"); + _ASSIGN_eventName(eMouseMove, "eMouseMove"); + _ASSIGN_eventName(eLoad, "eLoad"); + _ASSIGN_eventName(ePopState, "ePopState"); + _ASSIGN_eventName(eBeforeScriptExecute, "eBeforeScriptExecute"); + _ASSIGN_eventName(eAfterScriptExecute, "eAfterScriptExecute"); + _ASSIGN_eventName(eUnload, "eUnload"); + _ASSIGN_eventName(eHashChange, "eHashChange"); + _ASSIGN_eventName(eReadyStateChange, "eReadyStateChange"); + _ASSIGN_eventName(eXULBroadcast, "eXULBroadcast"); + _ASSIGN_eventName(eXULCommandUpdate, "eXULCommandUpdate"); + +# undef _ASSIGN_eventName + + default: { + eventName.AssignLiteral("UNKNOWN: "); + eventName.AppendInt(aGuiEvent->mMessage); + } break; + } + + return nsAutoString(eventName); +} +////////////////////////////////////////////////////////////// +// +// Code to deal with paint and event debug prefs. +// +////////////////////////////////////////////////////////////// +struct PrefPair { + const char* name; + bool value; +}; + +static PrefPair debug_PrefValues[] = { + {"nglayout.debug.crossing_event_dumping", false}, + {"nglayout.debug.event_dumping", false}, + {"nglayout.debug.invalidate_dumping", false}, + {"nglayout.debug.motion_event_dumping", false}, + {"nglayout.debug.paint_dumping", false}}; + +////////////////////////////////////////////////////////////// +bool nsBaseWidget::debug_GetCachedBoolPref(const char* aPrefName) { + NS_ASSERTION(nullptr != aPrefName, "cmon, pref name is null."); + + for (uint32_t i = 0; i < ArrayLength(debug_PrefValues); i++) { + if (strcmp(debug_PrefValues[i].name, aPrefName) == 0) { + return debug_PrefValues[i].value; + } + } + + return false; +} +////////////////////////////////////////////////////////////// +static void debug_SetCachedBoolPref(const char* aPrefName, bool aValue) { + NS_ASSERTION(nullptr != aPrefName, "cmon, pref name is null."); + + for (uint32_t i = 0; i < ArrayLength(debug_PrefValues); i++) { + if (strcmp(debug_PrefValues[i].name, aPrefName) == 0) { + debug_PrefValues[i].value = aValue; + + return; + } + } + + NS_ASSERTION(false, "cmon, this code is not reached dude."); +} + +////////////////////////////////////////////////////////////// +class Debug_PrefObserver final : public nsIObserver { + ~Debug_PrefObserver() = default; + + public: + NS_DECL_ISUPPORTS + NS_DECL_NSIOBSERVER +}; + +NS_IMPL_ISUPPORTS(Debug_PrefObserver, nsIObserver) + +NS_IMETHODIMP +Debug_PrefObserver::Observe(nsISupports* subject, const char* topic, + const char16_t* data) { + NS_ConvertUTF16toUTF8 prefName(data); + + bool value = Preferences::GetBool(prefName.get(), false); + debug_SetCachedBoolPref(prefName.get(), value); + return NS_OK; +} + +////////////////////////////////////////////////////////////// +/* static */ void debug_RegisterPrefCallbacks() { + static bool once = true; + + if (!once) { + return; + } + + once = false; + + nsCOMPtr<nsIObserver> obs(new Debug_PrefObserver()); + for (uint32_t i = 0; i < ArrayLength(debug_PrefValues); i++) { + // Initialize the pref values + debug_PrefValues[i].value = + Preferences::GetBool(debug_PrefValues[i].name, false); + + if (obs) { + // Register callbacks for when these change + nsCString name; + name.AssignLiteral(debug_PrefValues[i].name, + strlen(debug_PrefValues[i].name)); + Preferences::AddStrongObserver(obs, name); + } + } +} +////////////////////////////////////////////////////////////// +static int32_t _GetPrintCount() { + static int32_t sCount = 0; + + return ++sCount; +} +////////////////////////////////////////////////////////////// +/* static */ +void nsBaseWidget::debug_DumpEvent(FILE* aFileOut, nsIWidget* aWidget, + WidgetGUIEvent* aGuiEvent, + const char* aWidgetName, int32_t aWindowID) { + if (aGuiEvent->mMessage == eMouseMove) { + if (!debug_GetCachedBoolPref("nglayout.debug.motion_event_dumping")) return; + } + + if (aGuiEvent->mMessage == eMouseEnterIntoWidget || + aGuiEvent->mMessage == eMouseExitFromWidget) { + if (!debug_GetCachedBoolPref("nglayout.debug.crossing_event_dumping")) + return; + } + + if (!debug_GetCachedBoolPref("nglayout.debug.event_dumping")) return; + + NS_LossyConvertUTF16toASCII tempString( + debug_GuiEventToString(aGuiEvent).get()); + + fprintf(aFileOut, "%4d %-26s widget=%-8p name=%-12s id=0x%-6x refpt=%d,%d\n", + _GetPrintCount(), tempString.get(), (void*)aWidget, aWidgetName, + aWindowID, aGuiEvent->mRefPoint.x.value, + aGuiEvent->mRefPoint.y.value); +} +////////////////////////////////////////////////////////////// +/* static */ +void nsBaseWidget::debug_DumpPaintEvent(FILE* aFileOut, nsIWidget* aWidget, + const nsIntRegion& aRegion, + const char* aWidgetName, + int32_t aWindowID) { + NS_ASSERTION(nullptr != aFileOut, "cmon, null output FILE"); + NS_ASSERTION(nullptr != aWidget, "cmon, the widget is null"); + + if (!debug_GetCachedBoolPref("nglayout.debug.paint_dumping")) return; + + nsIntRect rect = aRegion.GetBounds(); + fprintf(aFileOut, + "%4d PAINT widget=%p name=%-12s id=0x%-6x bounds-rect=%3d,%-3d " + "%3d,%-3d", + _GetPrintCount(), (void*)aWidget, aWidgetName, aWindowID, rect.X(), + rect.Y(), rect.Width(), rect.Height()); + + fprintf(aFileOut, "\n"); +} +////////////////////////////////////////////////////////////// +/* static */ +void nsBaseWidget::debug_DumpInvalidate(FILE* aFileOut, nsIWidget* aWidget, + const LayoutDeviceIntRect* aRect, + const char* aWidgetName, + int32_t aWindowID) { + if (!debug_GetCachedBoolPref("nglayout.debug.invalidate_dumping")) return; + + NS_ASSERTION(nullptr != aFileOut, "cmon, null output FILE"); + NS_ASSERTION(nullptr != aWidget, "cmon, the widget is null"); + + fprintf(aFileOut, "%4d Invalidate widget=%p name=%-12s id=0x%-6x", + _GetPrintCount(), (void*)aWidget, aWidgetName, aWindowID); + + if (aRect) { + fprintf(aFileOut, " rect=%3d,%-3d %3d,%-3d", aRect->X(), aRect->Y(), + aRect->Width(), aRect->Height()); + } else { + fprintf(aFileOut, " rect=%-15s", "none"); + } + + fprintf(aFileOut, "\n"); +} +////////////////////////////////////////////////////////////// + +#endif // DEBUG |