1 files changed, 249 insertions, 0 deletions
diff --git a/layout/forms/nsNumberControlFrame.cpp b/layout/forms/nsNumberControlFrame.cpp
new file mode 100644
index 0000000000..93ecf66ed2
--- /dev/null
+++ b/layout/forms/nsNumberControlFrame.cpp
@@ -0,0 +1,249 @@
+/* -*- 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 "nsNumberControlFrame.h"
+
+#include "mozilla/BasicEvents.h"
+#include "mozilla/EventStates.h"
+#include "mozilla/FloatingPoint.h"
+#include "mozilla/PresShell.h"
+#include "HTMLInputElement.h"
+#include "nsGkAtoms.h"
+#include "nsNameSpaceManager.h"
+#include "nsStyleConsts.h"
+#include "nsContentUtils.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsCSSPseudoElements.h"
+
+#ifdef ACCESSIBILITY
+#  include "mozilla/a11y/AccTypes.h"
+#endif
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsIFrame* NS_NewNumberControlFrame(PresShell* aPresShell,
+                                   ComputedStyle* aStyle) {
+  return new (aPresShell)
+      nsNumberControlFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsNumberControlFrame)
+
+NS_QUERYFRAME_HEAD(nsNumberControlFrame)
+  NS_QUERYFRAME_ENTRY(nsNumberControlFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsTextControlFrame)
+
+nsNumberControlFrame::nsNumberControlFrame(ComputedStyle* aStyle,
+                                           nsPresContext* aPresContext)
+    : nsTextControlFrame(aStyle, aPresContext, kClassID) {}
+
+void nsNumberControlFrame::DestroyFrom(nsIFrame* aDestructRoot,
+                                       PostDestroyData& aPostDestroyData) {
+  aPostDestroyData.AddAnonymousContent(mOuterWrapper.forget());
+  nsTextControlFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
+}
+
+nsresult nsNumberControlFrame::CreateAnonymousContent(
+    nsTArray<ContentInfo>& aElements) {
+  // We create an anonymous tree for our input element that is structured as
+  // follows:
+  //
+  // input
+  //   div      - outer wrapper with "display:flex" by default
+  //     div    - editor root
+  //     div    - spin box wrapping up/down arrow buttons
+  //       div  - spin up (up arrow button)
+  //       div  - spin down (down arrow button)
+  //   div      - placeholder
+  //   div      - preview div
+  //
+  // If you change this, be careful to change the destruction order in
+  // nsNumberControlFrame::DestroyFrom.
+
+  // Create the anonymous outer wrapper:
+  mOuterWrapper = MakeAnonElement(PseudoStyleType::mozComplexControlWrapper);
+
+  // We want to do this now, rather than on the caller, so that the
+  // AppendChildTo calls below know that they are anonymous already. This is
+  // important for the NODE_IS_EDITABLE flag handling, for example.
+  mOuterWrapper->SetIsNativeAnonymousRoot();
+
+  aElements.AppendElement(mOuterWrapper);
+
+  nsTArray<ContentInfo> nestedContent;
+  nsTextControlFrame::CreateAnonymousContent(nestedContent);
+  for (auto& content : nestedContent) {
+    // The root goes inside the container.
+    if (content.mContent == mRootNode) {
+      mOuterWrapper->AppendChildTo(content.mContent, false);
+    } else {
+      // The rest (placeholder and preview), directly under us.
+      aElements.AppendElement(std::move(content));
+    }
+  }
+
+  if (StyleDisplay()->EffectiveAppearance() == StyleAppearance::Textfield) {
+    // The author has elected to hide the spinner by setting this
+    // -moz-appearance. We will reframe if it changes.
+    return NS_OK;
+  }
+
+  // Create the ::-moz-number-spin-box pseudo-element:
+  mSpinBox = MakeAnonElement(PseudoStyleType::mozNumberSpinBox, mOuterWrapper);
+
+  // Create the ::-moz-number-spin-up pseudo-element:
+  mSpinUp = MakeAnonElement(PseudoStyleType::mozNumberSpinUp, mSpinBox);
+
+  // Create the ::-moz-number-spin-down pseudo-element:
+  mSpinDown = MakeAnonElement(PseudoStyleType::mozNumberSpinDown, mSpinBox);
+
+  return NS_OK;
+}
+
+/* static */
+nsNumberControlFrame* nsNumberControlFrame::GetNumberControlFrameForTextField(
+    nsIFrame* aFrame) {
+  // If aFrame is the anon text field for an <input type=number> then we expect
+  // the frame of its mContent's grandparent to be that input's frame. We
+  // have to check for this via the content tree because we don't know whether
+  // extra frames will be wrapped around any of the elements between aFrame and
+  // the nsNumberControlFrame that we're looking for (e.g. flex wrappers).
+  nsIContent* content = aFrame->GetContent();
+  if (content->IsInNativeAnonymousSubtree() && content->GetParent() &&
+      content->GetParent()->GetParent()) {
+    nsIContent* grandparent = content->GetParent()->GetParent();
+    if (grandparent->IsHTMLElement(nsGkAtoms::input) &&
+        grandparent->AsElement()->AttrValueIs(
+            kNameSpaceID_None, nsGkAtoms::type, nsGkAtoms::number,
+            eCaseMatters)) {
+      return do_QueryFrame(grandparent->GetPrimaryFrame());
+    }
+  }
+  return nullptr;
+}
+
+/* static */
+nsNumberControlFrame* nsNumberControlFrame::GetNumberControlFrameForSpinButton(
+    nsIFrame* aFrame) {
+  // If aFrame is a spin button for an <input type=number> then we expect the
+  // frame of its mContent's great-grandparent to be that input's frame. We
+  // have to check for this via the content tree because we don't know whether
+  // extra frames will be wrapped around any of the elements between aFrame and
+  // the nsNumberControlFrame that we're looking for (e.g. flex wrappers).
+  nsIContent* content = aFrame->GetContent();
+  if (content->IsInNativeAnonymousSubtree() && content->GetParent() &&
+      content->GetParent()->GetParent() &&
+      content->GetParent()->GetParent()->GetParent()) {
+    nsIContent* greatgrandparent =
+        content->GetParent()->GetParent()->GetParent();
+    if (greatgrandparent->IsHTMLElement(nsGkAtoms::input) &&
+        greatgrandparent->AsElement()->AttrValueIs(
+            kNameSpaceID_None, nsGkAtoms::type, nsGkAtoms::number,
+            eCaseMatters)) {
+      return do_QueryFrame(greatgrandparent->GetPrimaryFrame());
+    }
+  }
+  return nullptr;
+}
+
+int32_t nsNumberControlFrame::GetSpinButtonForPointerEvent(
+    WidgetGUIEvent* aEvent) const {
+  MOZ_ASSERT(aEvent->mClass == eMouseEventClass, "Unexpected event type");
+
+  if (!mSpinBox) {
+    // we don't have a spinner
+    return eSpinButtonNone;
+  }
+  if (aEvent->mOriginalTarget == mSpinUp) {
+    return eSpinButtonUp;
+  }
+  if (aEvent->mOriginalTarget == mSpinDown) {
+    return eSpinButtonDown;
+  }
+  if (aEvent->mOriginalTarget == mSpinBox) {
+    // In the case that the up/down buttons are hidden (display:none) we use
+    // just the spin box element, spinning up if the pointer is over the top
+    // half of the element, or down if it's over the bottom half. This is
+    // important to handle since this is the state things are in for the
+    // default UA style sheet. See the comment in forms.css for why.
+    LayoutDeviceIntPoint absPoint = aEvent->mRefPoint;
+    nsPoint point = nsLayoutUtils::GetEventCoordinatesRelativeTo(
+        aEvent, absPoint, RelativeTo{mSpinBox->GetPrimaryFrame()});
+    if (point != nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE)) {
+      if (point.y < mSpinBox->GetPrimaryFrame()->GetSize().height / 2) {
+        return eSpinButtonUp;
+      }
+      return eSpinButtonDown;
+    }
+  }
+  return eSpinButtonNone;
+}
+
+void nsNumberControlFrame::SpinnerStateChanged() const {
+  MOZ_ASSERT(mSpinUp && mSpinDown,
+             "We should not be called when we have no spinner");
+
+  nsIFrame* spinUpFrame = mSpinUp->GetPrimaryFrame();
+  if (spinUpFrame && spinUpFrame->IsThemed()) {
+    spinUpFrame->InvalidateFrame();
+  }
+  nsIFrame* spinDownFrame = mSpinDown->GetPrimaryFrame();
+  if (spinDownFrame && spinDownFrame->IsThemed()) {
+    spinDownFrame->InvalidateFrame();
+  }
+}
+
+bool nsNumberControlFrame::SpinnerUpButtonIsDepressed() const {
+  return HTMLInputElement::FromNode(mContent)
+      ->NumberSpinnerUpButtonIsDepressed();
+}
+
+bool nsNumberControlFrame::SpinnerDownButtonIsDepressed() const {
+  return HTMLInputElement::FromNode(mContent)
+      ->NumberSpinnerDownButtonIsDepressed();
+}
+
+#define STYLES_DISABLING_NATIVE_THEMING \
+  NS_AUTHOR_SPECIFIED_BORDER_OR_BACKGROUND | NS_AUTHOR_SPECIFIED_PADDING
+
+bool nsNumberControlFrame::ShouldUseNativeStyleForSpinner() const {
+  MOZ_ASSERT(mSpinUp && mSpinDown,
+             "We should not be called when we have no spinner");
+
+  nsIFrame* spinUpFrame = mSpinUp->GetPrimaryFrame();
+  nsIFrame* spinDownFrame = mSpinDown->GetPrimaryFrame();
+
+  return spinUpFrame &&
+         spinUpFrame->StyleDisplay()->EffectiveAppearance() ==
+             StyleAppearance::SpinnerUpbutton &&
+         !PresContext()->HasAuthorSpecifiedRules(
+             spinUpFrame, STYLES_DISABLING_NATIVE_THEMING) &&
+         spinDownFrame &&
+         spinDownFrame->StyleDisplay()->EffectiveAppearance() ==
+             StyleAppearance::SpinnerDownbutton &&
+         !PresContext()->HasAuthorSpecifiedRules(
+             spinDownFrame, STYLES_DISABLING_NATIVE_THEMING);
+}
+
+void nsNumberControlFrame::AppendAnonymousContentTo(
+    nsTArray<nsIContent*>& aElements, uint32_t aFilter) {
+  if (mOuterWrapper) {
+    aElements.AppendElement(mOuterWrapper);
+  }
+  if (mPlaceholderDiv) {
+    aElements.AppendElement(mPlaceholderDiv);
+  }
+  if (mPreviewDiv) {
+    aElements.AppendElement(mPreviewDiv);
+  }
+}
+
+#ifdef ACCESSIBILITY
+a11y::AccType nsNumberControlFrame::AccessibleType() {
+  return a11y::eHTMLSpinnerType;
+}
+#endif