Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 767 insertions, 0 deletions

diff --git a/widget/uikit/nsWindow.mm b/widget/uikit/nsWindow.mm
new file mode 100644
index 0000000000..0c1a38c27c
--- /dev/null
+++ b/widget/uikit/nsWindow.mm
@@ -0,0 +1,767 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#import <UIKit/UIEvent.h>
+#import <UIKit/UIGraphics.h>
+#import <UIKit/UIInterface.h>
+#import <UIKit/UIScreen.h>
+#import <UIKit/UITapGestureRecognizer.h>
+#import <UIKit/UITouch.h>
+#import <UIKit/UIView.h>
+#import <UIKit/UIViewController.h>
+#import <UIKit/UIWindow.h>
+#import <QuartzCore/QuartzCore.h>
+
+#include <algorithm>
+
+#include "nsWindow.h"
+#include "nsScreenManager.h"
+#include "nsAppShell.h"
+
+#include "nsWidgetsCID.h"
+#include "nsGfxCIID.h"
+
+#include "gfxQuartzSurface.h"
+#include "gfxUtils.h"
+#include "gfxImageSurface.h"
+#include "gfxContext.h"
+#include "nsRegion.h"
+#include "Layers.h"
+#include "nsTArray.h"
+
+#include "mozilla/BasicEvents.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/TouchEvents.h"
+#include "mozilla/Unused.h"
+#include "mozilla/dom/MouseEventBinding.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::layers;
+
+#define ALOG(args...)    \
+  fprintf(stderr, args); \
+  fprintf(stderr, "\n")
+
+static LayoutDeviceIntPoint UIKitPointsToDevPixels(CGPoint aPoint,
+                                                   CGFloat aBackingScale) {
+  return LayoutDeviceIntPoint(NSToIntRound(aPoint.x * aBackingScale),
+                              NSToIntRound(aPoint.y * aBackingScale));
+}
+
+static CGRect DevPixelsToUIKitPoints(const LayoutDeviceIntRect& aRect,
+                                     CGFloat aBackingScale) {
+  return CGRectMake((CGFloat)aRect.x / aBackingScale,
+                    (CGFloat)aRect.y / aBackingScale,
+                    (CGFloat)aRect.width / aBackingScale,
+                    (CGFloat)aRect.height / aBackingScale);
+}
+
+// Used to retain a Cocoa object for the remainder of a method's execution.
+class nsAutoRetainUIKitObject {
+ public:
+  nsAutoRetainUIKitObject(id anObject) { mObject = [anObject retain]; }
+  ~nsAutoRetainUIKitObject() { [mObject release]; }
+
+ private:
+  id mObject;  // [STRONG]
+};
+
+@interface ChildView : UIView {
+ @public
+  nsWindow* mGeckoChild;  // weak ref
+  BOOL mWaitingForPaint;
+  CFMutableDictionaryRef mTouches;
+  int mNextTouchID;
+}
+// sets up our view, attaching it to its owning gecko view
+- (id)initWithFrame:(CGRect)inFrame geckoChild:(nsWindow*)inChild;
+// Our Gecko child was Destroy()ed
+- (void)widgetDestroyed;
+// Tear down this ChildView
+- (void)delayedTearDown;
+- (void)sendMouseEvent:(EventMessage)aType
+                 point:(LayoutDeviceIntPoint)aPoint
+                widget:(nsWindow*)aWindow;
+- (void)handleTap:(UITapGestureRecognizer*)sender;
+- (BOOL)isUsingMainThreadOpenGL;
+- (void)drawUsingOpenGL;
+- (void)drawUsingOpenGLCallback;
+- (void)sendTouchEvent:(EventMessage)aType
+               touches:(NSSet*)aTouches
+                widget:(nsWindow*)aWindow;
+// Event handling (UIResponder)
+- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event;
+- (void)touchesCancelled:(NSSet*)touches withEvent:(UIEvent*)event;
+- (void)touchesEnded:(NSSet*)touches withEvent:(UIEvent*)event;
+- (void)touchesMoved:(NSSet*)touches withEvent:(UIEvent*)event;
+@end
+
+@implementation ChildView
++ (Class)layerClass {
+  return [CAEAGLLayer class];
+}
+
+- (id)initWithFrame:(CGRect)inFrame geckoChild:(nsWindow*)inChild {
+  self.multipleTouchEnabled = YES;
+  if ((self = [super initWithFrame:inFrame])) {
+    mGeckoChild = inChild;
+  }
+  ALOG("[ChildView[%p] initWithFrame:] (mGeckoChild = %p)", (void*)self,
+       (void*)mGeckoChild);
+  self.opaque = YES;
+  self.alpha = 1.0;
+
+  UITapGestureRecognizer* tapRecognizer =
+      [[UITapGestureRecognizer alloc] initWithTarget:self
+                                              action:@selector(handleTap:)];
+  tapRecognizer.numberOfTapsRequired = 1;
+  [self addGestureRecognizer:tapRecognizer];
+
+  mTouches =
+      CFDictionaryCreateMutable(kCFAllocatorDefault, 0, nullptr, nullptr);
+  mNextTouchID = 0;
+  return self;
+}
+
+- (void)widgetDestroyed {
+  mGeckoChild = nullptr;
+  CFRelease(mTouches);
+}
+
+- (void)delayedTearDown {
+  [self removeFromSuperview];
+  [self release];
+}
+
+- (void)sendMouseEvent:(EventMessage)aType
+                 point:(LayoutDeviceIntPoint)aPoint
+                widget:(nsWindow*)aWindow {
+  WidgetMouseEvent event(true, aType, aWindow, WidgetMouseEvent::eReal,
+                         WidgetMouseEvent::eNormal);
+
+  event.mRefPoint = aPoint;
+  event.mClickCount = 1;
+  event.button = MouseButton::ePrimary;
+  event.mTime = PR_IntervalNow();
+  event.inputSource = MouseEvent_Binding::MOZ_SOURCE_UNKNOWN;
+
+  nsEventStatus status;
+  aWindow->DispatchEvent(&event, status);
+}
+
+- (void)handleTap:(UITapGestureRecognizer*)sender {
+  if (sender.state == UIGestureRecognizerStateEnded) {
+    ALOG("[ChildView[%p] handleTap]", self);
+    LayoutDeviceIntPoint lp = UIKitPointsToDevPixels(
+        [sender locationInView:self], [self contentScaleFactor]);
+    [self sendMouseEvent:eMouseMove point:lp widget:mGeckoChild];
+    [self sendMouseEvent:eMouseDown point:lp widget:mGeckoChild];
+    [self sendMouseEvent:eMouseUp point:lp widget:mGeckoChild];
+  }
+}
+
+- (void)sendTouchEvent:(EventMessage)aType
+               touches:(NSSet*)aTouches
+                widget:(nsWindow*)aWindow {
+  WidgetTouchEvent event(true, aType, aWindow);
+  // XXX: I think nativeEvent.timestamp * 1000 is probably usable here but
+  // I don't care that much right now.
+  event.mTime = PR_IntervalNow();
+  event.mTouches.SetCapacity(aTouches.count);
+  for (UITouch* touch in aTouches) {
+    LayoutDeviceIntPoint loc = UIKitPointsToDevPixels(
+        [touch locationInView:self], [self contentScaleFactor]);
+    LayoutDeviceIntPoint radius =
+        UIKitPointsToDevPixels([touch majorRadius], [touch majorRadius]);
+    void* value;
+    if (!CFDictionaryGetValueIfPresent(mTouches, touch, (const void**)&value)) {
+      // This shouldn't happen.
+      NS_ASSERTION(false, "Got a touch that we didn't know about");
+      continue;
+    }
+    int id = reinterpret_cast<int>(value);
+    RefPtr<Touch> t = new Touch(id, loc, radius, 0.0f, 1.0f);
+    event.mRefPoint = loc;
+    event.mTouches.AppendElement(t);
+  }
+  aWindow->DispatchInputEvent(&event);
+}
+
+- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event {
+  ALOG("[ChildView[%p] touchesBegan", self);
+  if (!mGeckoChild) return;
+
+  for (UITouch* touch : touches) {
+    CFDictionaryAddValue(mTouches, touch, (void*)mNextTouchID);
+    mNextTouchID++;
+  }
+  [self sendTouchEvent:eTouchStart
+               touches:[event allTouches]
+                widget:mGeckoChild];
+}
+
+- (void)touchesCancelled:(NSSet*)touches withEvent:(UIEvent*)event {
+  ALOG("[ChildView[%p] touchesCancelled", self);
+  [self sendTouchEvent:eTouchCancel touches:touches widget:mGeckoChild];
+  for (UITouch* touch : touches) {
+    CFDictionaryRemoveValue(mTouches, touch);
+  }
+  if (CFDictionaryGetCount(mTouches) == 0) {
+    mNextTouchID = 0;
+  }
+}
+
+- (void)touchesEnded:(NSSet*)touches withEvent:(UIEvent*)event {
+  ALOG("[ChildView[%p] touchesEnded", self);
+  if (!mGeckoChild) return;
+
+  [self sendTouchEvent:eTouchEnd touches:touches widget:mGeckoChild];
+  for (UITouch* touch : touches) {
+    CFDictionaryRemoveValue(mTouches, touch);
+  }
+  if (CFDictionaryGetCount(mTouches) == 0) {
+    mNextTouchID = 0;
+  }
+}
+
+- (void)touchesMoved:(NSSet*)touches withEvent:(UIEvent*)event {
+  ALOG("[ChildView[%p] touchesMoved", self);
+  if (!mGeckoChild) return;
+
+  [self sendTouchEvent:eTouchMove
+               touches:[event allTouches]
+                widget:mGeckoChild];
+}
+
+- (void)setNeedsDisplayInRect:(CGRect)aRect {
+  if ([self isUsingMainThreadOpenGL]) {
+    // Draw without calling drawRect. This prevent us from
+    // needing to access the normal window buffer surface unnecessarily, so we
+    // waste less time synchronizing the two surfaces.
+    if (!mWaitingForPaint) {
+      mWaitingForPaint = YES;
+      // Use NSRunLoopCommonModes instead of the default NSDefaultRunLoopMode
+      // so that the timer also fires while a native menu is open.
+      [self performSelector:@selector(drawUsingOpenGLCallback)
+                 withObject:nil
+                 afterDelay:0
+                    inModes:[NSArray arrayWithObject:NSRunLoopCommonModes]];
+    }
+  }
+}
+
+- (BOOL)isUsingMainThreadOpenGL {
+  if (!mGeckoChild || ![self window]) return NO;
+
+  return NO;
+}
+
+- (void)drawUsingOpenGL {
+  ALOG("drawUsingOpenGL");
+  AUTO_PROFILER_LABEL("ChildView::drawUsingOpenGL", OTHER);
+
+  if (!mGeckoChild->IsVisible()) return;
+
+  mWaitingForPaint = NO;
+
+  LayoutDeviceIntRect geckoBounds = mGeckoChild->GetBounds();
+  LayoutDeviceIntRegion region(geckoBounds);
+
+  mGeckoChild->PaintWindow(region);
+}
+
+// Called asynchronously after setNeedsDisplay in order to avoid entering the
+// normal drawing machinery.
+- (void)drawUsingOpenGLCallback {
+  if (mWaitingForPaint) {
+    [self drawUsingOpenGL];
+  }
+}
+
+// The display system has told us that a portion of our view is dirty. Tell
+// gecko to paint it
+- (void)drawRect:(CGRect)aRect {
+  CGContextRef cgContext = UIGraphicsGetCurrentContext();
+  [self drawRect:aRect inContext:cgContext];
+}
+
+- (void)drawRect:(CGRect)aRect inContext:(CGContextRef)aContext {
+#ifdef DEBUG_UPDATE
+  LayoutDeviceIntRect geckoBounds = mGeckoChild->GetBounds();
+
+  fprintf(stderr,
+          "---- Update[%p][%p] [%f %f %f %f] cgc: %p\n  gecko bounds: [%d %d "
+          "%d %d]\n",
+          self, mGeckoChild, aRect.origin.x, aRect.origin.y, aRect.size.width,
+          aRect.size.height, aContext, geckoBounds.x, geckoBounds.y,
+          geckoBounds.width, geckoBounds.height);
+
+  CGAffineTransform xform = CGContextGetCTM(aContext);
+  fprintf(stderr, "  xform in: [%f %f %f %f %f %f]\n", xform.a, xform.b,
+          xform.c, xform.d, xform.tx, xform.ty);
+#endif
+
+  if (true) {
+    // For Gecko-initiated repaints in OpenGL mode, drawUsingOpenGL is
+    // directly called from a delayed perform callback - without going through
+    // drawRect.
+    // Paints that come through here are triggered by something that Cocoa
+    // controls, for example by window resizing or window focus changes.
+
+    // Do GL composition and return.
+    [self drawUsingOpenGL];
+    return;
+  }
+  AUTO_PROFILER_LABEL("ChildView::drawRect", OTHER);
+
+  // The CGContext that drawRect supplies us with comes with a transform that
+  // scales one user space unit to one Cocoa point, which can consist of
+  // multiple dev pixels. But Gecko expects its supplied context to be scaled
+  // to device pixels, so we need to reverse the scaling.
+  double scale = mGeckoChild->BackingScaleFactor();
+  CGContextSaveGState(aContext);
+  CGContextScaleCTM(aContext, 1.0 / scale, 1.0 / scale);
+
+  CGSize viewSize = [self bounds].size;
+  gfx::IntSize backingSize(viewSize.width * scale, viewSize.height * scale);
+
+  CGContextSaveGState(aContext);
+
+  LayoutDeviceIntRegion region =
+      LayoutDeviceIntRect(NSToIntRound(aRect.origin.x * scale),
+                          NSToIntRound(aRect.origin.y * scale),
+                          NSToIntRound(aRect.size.width * scale),
+                          NSToIntRound(aRect.size.height * scale));
+
+  // Create Cairo objects.
+  RefPtr<gfxQuartzSurface> targetSurface;
+
+  UniquePtrPtr<gfxContext> targetContext;
+  if (gfxPlatform::GetPlatform()->SupportsAzureContentForType(
+          gfx::BackendType::CAIRO)) {
+    // This is dead code unless you mess with prefs, but keep it around for
+    // debugging.
+    targetSurface = new gfxQuartzSurface(aContext, backingSize);
+    targetSurface->SetAllowUseAsSource(false);
+    RefPtr<gfx::DrawTarget> dt =
+        gfxPlatform::CreateDrawTargetForSurface(targetSurface, backingSize);
+    if (!dt || !dt->IsValid()) {
+      gfxDevCrash(mozilla::gfx::LogReason::InvalidContext)
+          << "Window context problem 2 " << backingSize;
+      return;
+    }
+    targetContext = gfxContext::CreateOrNull(dt);
+  } else {
+    MOZ_ASSERT_UNREACHABLE("COREGRAPHICS is the only supported backend");
+  }
+  MOZ_ASSERT(targetContext);  // already checked for valid draw targets above
+
+  // Set up the clip region.
+  targetContext->NewPath();
+  for (auto iter = region.RectIter(); !iter.Done(); iter.Next()) {
+    const LayoutDeviceIntRect& r = iter.Get();
+    targetContext->Rectangle(gfxRect(r.x, r.y, r.width, r.height));
+  }
+  targetContext->Clip();
+
+  // nsAutoRetainCocoaObject kungFuDeathGrip(self);
+  bool painted = false;
+  targetContext = nullptr;
+  targetSurface = nullptr;
+
+  CGContextRestoreGState(aContext);
+
+  // Undo the scale transform so that from now on the context is in
+  // CocoaPoints again.
+  CGContextRestoreGState(aContext);
+  if (!painted && [self isOpaque]) {
+    // Gecko refused to draw, but we've claimed to be opaque, so we have to
+    // draw something--fill with white.
+    CGContextSetRGBFillColor(aContext, 1, 1, 1, 1);
+    CGContextFillRect(aContext, aRect);
+  }
+
+#ifdef DEBUG_UPDATE
+  fprintf(stderr, "---- update done ----\n");
+
+#  if 0
+  CGContextSetRGBStrokeColor (aContext,
+                            ((((unsigned long)self) & 0xff)) / 255.0,
+                            ((((unsigned long)self) & 0xff00) >> 8) / 255.0,
+                            ((((unsigned long)self) & 0xff0000) >> 16) / 255.0,
+                            0.5);
+#  endif
+  CGContextSetRGBStrokeColor(aContext, 1, 0, 0, 0.8);
+  CGContextSetLineWidth(aContext, 4.0);
+  CGContextStrokeRect(aContext, aRect);
+#endif
+}
+@end
+
+nsWindow::nsWindow()
+    : mNativeView(nullptr),
+      mVisible(false),
+      mSizeMode(nsSizeMode_Normal),
+      mParent(nullptr) {}
+
+nsWindow::~nsWindow() {
+  [mNativeView widgetDestroyed];  // Safe if mNativeView is nil.
+  TearDownView();                 // Safe if called twice.
+}
+
+void nsWindow::TearDownView() {
+  if (!mNativeView) return;
+
+  [mNativeView performSelectorOnMainThread:@selector(delayedTearDown)
+                                withObject:nil
+                             waitUntilDone:false];
+  mNativeView = nil;
+}
+
+bool nsWindow::IsTopLevel() {
+  return mWindowType == WindowType::TopLevel ||
+         mWindowType == WindowType::Dialog ||
+         mWindowType == WindowType::Invisible;
+}
+
+//
+// nsIWidget
+//
+
+nsresult nsWindow::Create(nsIWidget* aParent, nsNativeWidget aNativeParent,
+                          const LayoutDeviceIntRect& aRect,
+                          widget::InitData* aInitData) {
+  ALOG("nsWindow[%p]::Create %p/%p [%d %d %d %d]", (void*)this, (void*)aParent,
+       (void*)aNativeParent, aRect.x, aRect.y, aRect.width, aRect.height);
+  nsWindow* parent = (nsWindow*)aParent;
+  ChildView* nativeParent = (ChildView*)aNativeParent;
+
+  if (parent == nullptr && nativeParent) parent = nativeParent->mGeckoChild;
+  if (parent && nativeParent == nullptr) nativeParent = parent->mNativeView;
+
+  // for toplevel windows, bounds are fixed to full screen size
+  if (parent == nullptr) {
+    if (nsAppShell::gWindow == nil) {
+      mBounds = UIKitScreenManager::GetBounds();
+    } else {
+      CGRect cgRect = [nsAppShell::gWindow bounds];
+      mBounds.x = cgRect.origin.x;
+      mBounds.y = cgRect.origin.y;
+      mBounds.width = cgRect.size.width;
+      mBounds.height = cgRect.size.height;
+    }
+  } else {
+    mBounds = aRect;
+  }
+
+  ALOG("nsWindow[%p]::Create bounds: %d %d %d %d", (void*)this, mBounds.x,
+       mBounds.y, mBounds.width, mBounds.height);
+
+  // Set defaults which can be overriden from aInitData in BaseCreate
+  mWindowType = WindowType::TopLevel;
+  mBorderStyle = BorderStyle::Default;
+
+  Inherited::BaseCreate(aParent, aInitData);
+
+  NS_ASSERTION(IsTopLevel() || parent,
+               "non top level window doesn't have a parent!");
+
+  mNativeView = [[ChildView alloc]
+      initWithFrame:DevPixelsToUIKitPoints(mBounds, BackingScaleFactor())
+         geckoChild:this];
+  mNativeView.hidden = YES;
+
+  if (parent) {
+    parent->mChildren.AppendElement(this);
+    mParent = parent;
+  }
+
+  if (nativeParent) {
+    [nativeParent addSubview:mNativeView];
+  } else if (nsAppShell::gWindow) {
+    [nsAppShell::gWindow.rootViewController.view addSubview:mNativeView];
+  } else {
+    [nsAppShell::gTopLevelViews addObject:mNativeView];
+  }
+
+  return NS_OK;
+}
+
+void nsWindow::Destroy() {
+  for (uint32_t i = 0; i < mChildren.Length(); ++i) {
+    // why do we still have children?
+    mChildren[i]->SetParent(nullptr);
+  }
+
+  if (mParent) mParent->mChildren.RemoveElement(this);
+
+  [mNativeView widgetDestroyed];
+
+  nsBaseWidget::Destroy();
+
+  // ReportDestroyEvent();
+
+  TearDownView();
+
+  nsBaseWidget::OnDestroy();
+
+  return NS_OK;
+}
+
+void nsWindow::Show(bool aState) {
+  if (aState != mVisible) {
+    mNativeView.hidden = aState ? NO : YES;
+    if (aState) {
+      UIView* parentView = mParent
+                               ? mParent->mNativeView
+                               : nsAppShell::gWindow.rootViewController.view;
+      [parentView bringSubviewToFront:mNativeView];
+      [mNativeView setNeedsDisplay];
+    }
+    mVisible = aState;
+  }
+}
+
+void nsWindow::Move(double aX, double aY) {
+  if (!mNativeView || (mBounds.x == aX && mBounds.y == aY)) return;
+
+  // XXX: handle this
+  // The point we have is in Gecko coordinates (origin top-left). Convert
+  // it to Cocoa ones (origin bottom-left).
+  mBounds.x = aX;
+  mBounds.y = aY;
+
+  mNativeView.frame = DevPixelsToUIKitPoints(mBounds, BackingScaleFactor());
+
+  if (mVisible) [mNativeView setNeedsDisplay];
+
+  ReportMoveEvent();
+}
+
+void nsWindow::Resize(double aX, double aY, double aWidth, double aHeight,
+                      bool aRepaint) {
+  BOOL isMoving = (mBounds.x != aX || mBounds.y != aY);
+  BOOL isResizing = (mBounds.width != aWidth || mBounds.height != aHeight);
+  if (!mNativeView || (!isMoving && !isResizing)) return;
+
+  if (isMoving) {
+    mBounds.x = aX;
+    mBounds.y = aY;
+  }
+  if (isResizing) {
+    mBounds.width = aWidth;
+    mBounds.height = aHeight;
+  }
+
+  [mNativeView setFrame:DevPixelsToUIKitPoints(mBounds, BackingScaleFactor())];
+
+  if (mVisible && aRepaint) [mNativeView setNeedsDisplay];
+
+  if (isMoving) ReportMoveEvent();
+
+  if (isResizing) ReportSizeEvent();
+}
+
+void nsWindow::Resize(double aWidth, double aHeight, bool aRepaint) {
+  if (!mNativeView || (mBounds.width == aWidth && mBounds.height == aHeight))
+    return;
+
+  mBounds.width = aWidth;
+  mBounds.height = aHeight;
+
+  [mNativeView setFrame:DevPixelsToUIKitPoints(mBounds, BackingScaleFactor())];
+
+  if (mVisible && aRepaint) [mNativeView setNeedsDisplay];
+
+  ReportSizeEvent();
+}
+
+void nsWindow::SetSizeMode(nsSizeMode aMode) {
+  if (aMode == static_cast<int32_t>(mSizeMode)) {
+    return;
+  }
+
+  mSizeMode = static_cast<nsSizeMode>(aMode);
+  if (aMode == nsSizeMode_Maximized || aMode == nsSizeMode_Fullscreen) {
+    // Resize to fill screen
+    nsBaseWidget::InfallibleMakeFullScreen(true);
+  }
+  ReportSizeModeEvent(aMode);
+}
+
+void nsWindow::Invalidate(const LayoutDeviceIntRect& aRect) {
+  if (!mNativeView || !mVisible) return;
+
+  MOZ_RELEASE_ASSERT(
+      GetLayerManager()->GetBackendType() != LayersBackend::LAYERS_WR,
+      "Shouldn't need to invalidate with accelerated OMTC layers!");
+
+  [mNativeView setNeedsLayout];
+  [mNativeView setNeedsDisplayInRect:DevPixelsToUIKitPoints(
+                                         mBounds, BackingScaleFactor())];
+}
+
+void nsWindow::SetFocus(Raise) {
+  [[mNativeView window] makeKeyWindow];
+  [mNativeView becomeFirstResponder];
+}
+
+void nsWindow::WillPaintWindow() {
+  if (mWidgetListener) {
+    mWidgetListener->WillPaintWindow(this);
+  }
+}
+
+bool nsWindow::PaintWindow(LayoutDeviceIntRegion aRegion) {
+  if (!mWidgetListener) return false;
+
+  bool returnValue = false;
+  returnValue = mWidgetListener->PaintWindow(this, aRegion);
+
+  if (mWidgetListener) {
+    mWidgetListener->DidPaintWindow();
+  }
+
+  return returnValue;
+}
+
+void nsWindow::ReportMoveEvent() { NotifyWindowMoved(mBounds.x, mBounds.y); }
+
+void nsWindow::ReportSizeModeEvent(nsSizeMode aMode) {
+  if (mWidgetListener) {
+    // This is terrible.
+    nsSizeMode theMode;
+    switch (aMode) {
+      case nsSizeMode_Maximized:
+        theMode = nsSizeMode_Maximized;
+        break;
+      case nsSizeMode_Fullscreen:
+        theMode = nsSizeMode_Fullscreen;
+        break;
+      default:
+        return;
+    }
+    mWidgetListener->SizeModeChanged(theMode);
+  }
+}
+
+void nsWindow::ReportSizeEvent() {
+  if (mWidgetListener) {
+    LayoutDeviceIntRect innerBounds = GetClientBounds();
+    mWidgetListener->WindowResized(this, innerBounds.width, innerBounds.height);
+  }
+}
+
+LayoutDeviceIntRect nsWindow::GetScreenBounds() {
+  return LayoutDeviceIntRect(WidgetToScreenOffset(), mBounds.Size());
+}
+
+LayoutDeviceIntPoint nsWindow::WidgetToScreenOffset() {
+  LayoutDeviceIntPoint offset(0, 0);
+  if (mParent) {
+    offset = mParent->WidgetToScreenOffset();
+  }
+
+  CGPoint temp = [mNativeView convertPoint:temp toView:nil];
+
+  if (!mParent && nsAppShell::gWindow) {
+    // convert to screen coords
+    temp = [nsAppShell::gWindow convertPoint:temp toWindow:nil];
+  }
+
+  offset.x += temp.x;
+  offset.y += temp.y;
+
+  return offset;
+}
+
+nsresult nsWindow::DispatchEvent(mozilla::WidgetGUIEvent* aEvent,
+                                 nsEventStatus& aStatus) {
+  aStatus = nsEventStatus_eIgnore;
+  nsCOMPtr<nsIWidget> kungFuDeathGrip(aEvent->mWidget);
+
+  if (mWidgetListener)
+    aStatus = mWidgetListener->HandleEvent(aEvent, mUseAttachedEvents);
+
+  return NS_OK;
+}
+
+void nsWindow::SetInputContext(const InputContext& aContext,
+                               const InputContextAction& aAction) {
+  // TODO: actually show VKB
+  mInputContext = aContext;
+}
+
+mozilla::widget::InputContext nsWindow::GetInputContext() {
+  return mInputContext;
+}
+
+void nsWindow::SetBackgroundColor(const nscolor& aColor) {
+  mNativeView.backgroundColor = [UIColor colorWithRed:NS_GET_R(aColor)
+                                                green:NS_GET_G(aColor)
+                                                 blue:NS_GET_B(aColor)
+                                                alpha:NS_GET_A(aColor)];
+}
+
+void* nsWindow::GetNativeData(uint32_t aDataType) {
+  void* retVal = nullptr;
+
+  switch (aDataType) {
+    case NS_NATIVE_WIDGET:
+      retVal = (void*)mNativeView;
+      break;
+
+    case NS_NATIVE_WINDOW:
+      retVal = [mNativeView window];
+      break;
+
+    case NS_NATIVE_GRAPHIC:
+      NS_ERROR("Requesting NS_NATIVE_GRAPHIC on a UIKit child view!");
+      break;
+
+    case NS_NATIVE_OFFSETX:
+      retVal = 0;
+      break;
+
+    case NS_NATIVE_OFFSETY:
+      retVal = 0;
+      break;
+
+    case NS_RAW_NATIVE_IME_CONTEXT:
+      retVal = GetPseudoIMEContext();
+      if (retVal) {
+        break;
+      }
+      retVal = NS_ONLY_ONE_NATIVE_IME_CONTEXT;
+      break;
+  }
+
+  return retVal;
+}
+
+CGFloat nsWindow::BackingScaleFactor() {
+  if (mNativeView) {
+    return [mNativeView contentScaleFactor];
+  }
+  return [UIScreen mainScreen].scale;
+}
+
+int32_t nsWindow::RoundsWidgetCoordinatesTo() {
+  if (BackingScaleFactor() == 2.0) {
+    return 2;
+  }
+  return 1;
+}
+
+already_AddRefed<nsIWidget> nsIWidget::CreateTopLevelWindow() {
+  nsCOMPtr<nsIWidget> window = new nsWindow();
+  return window.forget();
+}
+
+already_AddRefed<nsIWidget> nsIWidget::CreateChildWindow() {
+  nsCOMPtr<nsIWidget> window = new nsWindow();
+  return window.forget();
+}