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-rw-r--r--layout/forms/nsRangeFrame.h215
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diff --git a/layout/forms/nsRangeFrame.h b/layout/forms/nsRangeFrame.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsRangeFrame_h___
+#define nsRangeFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "mozilla/Decimal.h"
+#include "mozilla/EventForwards.h"
+#include "nsContainerFrame.h"
+#include "nsIAnonymousContentCreator.h"
+#include "nsIDOMEventListener.h"
+#include "nsCOMPtr.h"
+
+class nsDisplayRangeFocusRing;
+
+class nsRangeFrame : public nsContainerFrame,
+ public nsIAnonymousContentCreator
+{
+ friend nsIFrame*
+ NS_NewRangeFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
+
+ friend class nsDisplayRangeFocusRing;
+
+ explicit nsRangeFrame(nsStyleContext* aContext);
+ virtual ~nsRangeFrame();
+
+ typedef mozilla::CSSPseudoElementType CSSPseudoElementType;
+ typedef mozilla::dom::Element Element;
+
+public:
+ NS_DECL_QUERYFRAME_TARGET(nsRangeFrame)
+ NS_DECL_QUERYFRAME
+ NS_DECL_FRAMEARENA_HELPERS
+
+ // nsIFrame overrides
+ virtual void Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) override;
+
+ virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
+
+ void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsRect& aDirtyRect,
+ const nsDisplayListSet& aLists) override;
+
+ virtual void Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) override;
+
+#ifdef DEBUG_FRAME_DUMP
+ virtual nsresult GetFrameName(nsAString& aResult) const override {
+ return MakeFrameName(NS_LITERAL_STRING("Range"), aResult);
+ }
+#endif
+
+ virtual bool IsLeaf() const override { return true; }
+
+#ifdef ACCESSIBILITY
+ virtual mozilla::a11y::AccType AccessibleType() override;
+#endif
+
+ // nsIAnonymousContentCreator
+ virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
+ virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+ uint32_t aFilter) override;
+
+ virtual nsresult AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType) override;
+
+ virtual mozilla::LogicalSize
+ ComputeAutoSize(nsRenderingContext* aRenderingContext,
+ mozilla::WritingMode aWM,
+ const mozilla::LogicalSize& aCBSize,
+ nscoord aAvailableISize,
+ const mozilla::LogicalSize& aMargin,
+ const mozilla::LogicalSize& aBorder,
+ const mozilla::LogicalSize& aPadding,
+ ComputeSizeFlags aFlags) override;
+
+ virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
+ virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
+
+ virtual nsIAtom* GetType() const override;
+
+ virtual bool IsFrameOfType(uint32_t aFlags) const override
+ {
+ return nsContainerFrame::IsFrameOfType(aFlags &
+ ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
+ }
+
+ nsStyleContext* GetAdditionalStyleContext(int32_t aIndex) const override;
+ void SetAdditionalStyleContext(int32_t aIndex,
+ nsStyleContext* aStyleContext) override;
+
+ /**
+ * Returns true if the slider's thumb moves horizontally, or else false if it
+ * moves vertically.
+ */
+ bool IsHorizontal() const;
+
+ /**
+ * Returns true if the slider is oriented along the inline axis.
+ */
+ bool IsInlineOriented() const {
+ return IsHorizontal() != GetWritingMode().IsVertical();
+ }
+
+ /**
+ * Returns true if the slider's thumb moves right-to-left for increasing
+ * values; only relevant when IsHorizontal() is true.
+ */
+ bool IsRightToLeft() const {
+ MOZ_ASSERT(IsHorizontal());
+ mozilla::WritingMode wm = GetWritingMode();
+ return wm.IsVertical() ? wm.IsVerticalRL() : !wm.IsBidiLTR();
+ }
+
+ double GetMin() const;
+ double GetMax() const;
+ double GetValue() const;
+
+ /**
+ * Returns the input element's value as a fraction of the difference between
+ * the input's minimum and its maximum (i.e. returns 0.0 when the value is
+ * the same as the minimum, and returns 1.0 when the value is the same as the
+ * maximum).
+ */
+ double GetValueAsFractionOfRange();
+
+ /**
+ * Returns whether the frame and its child should use the native style.
+ */
+ bool ShouldUseNativeStyle() const;
+
+ mozilla::Decimal GetValueAtEventPoint(mozilla::WidgetGUIEvent* aEvent);
+
+ /**
+ * Helper that's used when the value of the range changes to reposition the
+ * thumb, resize the range-progress element, and schedule a repaint. (This
+ * does not reflow, since the position and size of the thumb and
+ * range-progress element do not affect the position or size of any other
+ * frames.)
+ */
+ void UpdateForValueChange();
+
+ virtual Element* GetPseudoElement(CSSPseudoElementType aType) override;
+
+private:
+
+ nsresult MakeAnonymousDiv(Element** aResult,
+ CSSPseudoElementType aPseudoType,
+ nsTArray<ContentInfo>& aElements);
+
+ // Helper function which reflows the anonymous div frames.
+ void ReflowAnonymousContent(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput);
+
+ void DoUpdateThumbPosition(nsIFrame* aThumbFrame,
+ const nsSize& aRangeSize);
+
+ void DoUpdateRangeProgressFrame(nsIFrame* aProgressFrame,
+ const nsSize& aRangeSize);
+
+ /**
+ * The div used to show the ::-moz-range-track pseudo-element.
+ * @see nsRangeFrame::CreateAnonymousContent
+ */
+ nsCOMPtr<Element> mTrackDiv;
+
+ /**
+ * The div used to show the ::-moz-range-progress pseudo-element, which is
+ * used to (optionally) style the specific chunk of track leading up to the
+ * thumb's current position.
+ * @see nsRangeFrame::CreateAnonymousContent
+ */
+ nsCOMPtr<Element> mProgressDiv;
+
+ /**
+ * The div used to show the ::-moz-range-thumb pseudo-element.
+ * @see nsRangeFrame::CreateAnonymousContent
+ */
+ nsCOMPtr<Element> mThumbDiv;
+
+ /**
+ * Cached style context for -moz-focus-outer CSS pseudo-element style.
+ */
+ RefPtr<nsStyleContext> mOuterFocusStyle;
+
+ class DummyTouchListener final : public nsIDOMEventListener
+ {
+ private:
+ ~DummyTouchListener() {}
+
+ public:
+ NS_DECL_ISUPPORTS
+
+ NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) override
+ {
+ return NS_OK;
+ }
+ };
+
+ /**
+ * A no-op touch-listener used for APZ purposes (see nsRangeFrame::Init).
+ */
+ RefPtr<DummyTouchListener> mDummyTouchListener;
+};
+
+#endif