зеркало из https://github.com/mozilla/gecko-dev.git
268 строки
10 KiB
C++
268 строки
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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Eric D Vaughan
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nsBoxFrame is a frame that can lay its children out either vertically or horizontally.
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It lays them out according to a min max or preferred size.
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**/
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#ifndef nsBoxFrame_h___
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#define nsBoxFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsCOMPtr.h"
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#include "nsContainerFrame.h"
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#include "nsBoxLayout.h"
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class nsBoxLayoutState;
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namespace mozilla {
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namespace gfx {
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class DrawTarget;
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} // namespace gfx
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} // namespace mozilla
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nsIFrame* NS_NewBoxFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext,
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bool aIsRoot,
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nsBoxLayout* aLayoutManager);
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nsIFrame* NS_NewBoxFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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class nsBoxFrame : public nsContainerFrame
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{
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protected:
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typedef mozilla::gfx::DrawTarget DrawTarget;
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public:
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NS_DECL_FRAMEARENA_HELPERS
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#ifdef DEBUG
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NS_DECL_QUERYFRAME_TARGET(nsBoxFrame)
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NS_DECL_QUERYFRAME
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#endif
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friend nsIFrame* NS_NewBoxFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext,
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bool aIsRoot,
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nsBoxLayout* aLayoutManager);
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friend nsIFrame* NS_NewBoxFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext);
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// gets the rect inside our border and debug border. If you wish to paint inside a box
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// call this method to get the rect so you don't draw on the debug border or outer border.
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virtual void SetXULLayoutManager(nsBoxLayout* aLayout) override { mLayoutManager = aLayout; }
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virtual nsBoxLayout* GetXULLayoutManager() override { return mLayoutManager; }
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virtual nsresult XULRelayoutChildAtOrdinal(nsIFrame* aChild) override;
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virtual nsSize GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMaxSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nscoord GetXULFlex() override;
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virtual nscoord GetXULBoxAscent(nsBoxLayoutState& aBoxLayoutState) override;
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#ifdef DEBUG_LAYOUT
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virtual nsresult SetXULDebug(nsBoxLayoutState& aBoxLayoutState, bool aDebug) override;
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virtual nsresult GetXULDebug(bool& aDebug) override;
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#endif
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virtual Valignment GetXULVAlign() const override { return mValign; }
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virtual Halignment GetXULHAlign() const override { return mHalign; }
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NS_IMETHOD DoXULLayout(nsBoxLayoutState& aBoxLayoutState) override;
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virtual bool ComputesOwnOverflowArea() override { return false; }
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// ----- child and sibling operations ---
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// ----- public methods -------
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) override;
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virtual void MarkIntrinsicISizesDirty() override;
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virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
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virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
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virtual void Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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virtual void SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) override;
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virtual void AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList) override;
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virtual void InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList) override;
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virtual void RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame) override;
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virtual nsContainerFrame* GetContentInsertionFrame() override;
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) override;
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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// record that children that are ignorable whitespace should be excluded
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// (When content was loaded via the XUL content sink, it's already
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// been excluded, but we need this for when the XUL namespace is used
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// in other MIME types or when the XUL CSS display types are used with
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// non-XUL elements.)
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// This is bogus, but it's what we've always done.
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// (Given that we're replaced, we need to say we're a replaced element
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// that contains a block so ReflowInput doesn't tell us to be
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// NS_INTRINSICSIZE wide.)
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return nsContainerFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock | eXULBox |
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nsIFrame::eExcludesIgnorableWhitespace));
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}
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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virtual void DidReflow(nsPresContext* aPresContext,
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const ReflowInput* aReflowInput,
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nsDidReflowStatus aStatus) override;
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virtual bool HonorPrintBackgroundSettings() override;
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virtual ~nsBoxFrame();
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explicit nsBoxFrame(nsStyleContext* aContext,
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bool aIsRoot = false,
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nsBoxLayout* aLayoutManager = nullptr)
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: nsBoxFrame(aContext,
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mozilla::LayoutFrameType::Box,
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aIsRoot,
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aLayoutManager)
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{}
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// virtual so nsStackFrame, nsButtonBoxFrame, nsSliderFrame and nsMenuFrame
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// can override it
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virtual void BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) override;
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#ifdef DEBUG_LAYOUT
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virtual void SetDebugOnChildList(nsBoxLayoutState& aState, nsIFrame* aChild, bool aDebug);
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nsresult DisplayDebugInfoFor(nsIFrame* aBox,
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nsPoint& aPoint);
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#endif
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static nsresult LayoutChildAt(nsBoxLayoutState& aState, nsIFrame* aBox, const nsRect& aRect);
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/**
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* Utility method to redirect events on descendants to this frame.
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* Supports 'allowevents' attribute on descendant elements to allow those
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* elements and their descendants to receive events.
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*/
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void WrapListsInRedirector(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aIn,
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const nsDisplayListSet& aOut);
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/**
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* This defaults to true, but some box frames (nsListBoxBodyFrame for
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* example) don't support ordinals in their children.
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*/
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virtual bool SupportsOrdinalsInChildren();
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protected:
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nsBoxFrame(nsStyleContext* aContext,
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mozilla::LayoutFrameType aType,
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bool aIsRoot = false,
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nsBoxLayout* aLayoutManager = nullptr);
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#ifdef DEBUG_LAYOUT
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virtual void GetBoxName(nsAutoString& aName) override;
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void PaintXULDebugBackground(nsRenderingContext& aRenderingContext,
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nsPoint aPt);
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void PaintXULDebugOverlay(DrawTarget& aRenderingContext,
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nsPoint aPt);
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#endif
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virtual bool GetInitialEqualSize(bool& aEqualSize);
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virtual void GetInitialOrientation(bool& aIsHorizontal);
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virtual void GetInitialDirection(bool& aIsNormal);
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virtual bool GetInitialHAlignment(Halignment& aHalign);
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virtual bool GetInitialVAlignment(Valignment& aValign);
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virtual bool GetInitialAutoStretch(bool& aStretch);
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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nsSize mPrefSize;
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nsSize mMinSize;
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nsSize mMaxSize;
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nscoord mFlex;
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nscoord mAscent;
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nsCOMPtr<nsBoxLayout> mLayoutManager;
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// Get the point associated with this event. Returns true if a single valid
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// point was found. Otherwise false.
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bool GetEventPoint(mozilla::WidgetGUIEvent* aEvent, nsPoint& aPoint);
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// Gets the event coordinates relative to the widget offset associated with
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// this frame. Return true if a single valid point was found.
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bool GetEventPoint(mozilla::WidgetGUIEvent* aEvent,
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mozilla::LayoutDeviceIntPoint& aPoint);
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protected:
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void RegUnregAccessKey(bool aDoReg);
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void CheckBoxOrder();
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private:
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#ifdef DEBUG_LAYOUT
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nsresult SetXULDebug(nsPresContext* aPresContext, bool aDebug);
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bool GetInitialDebug(bool& aDebug);
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void GetDebugPref();
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void GetDebugBorder(nsMargin& aInset);
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void GetDebugPadding(nsMargin& aInset);
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void GetDebugMargin(nsMargin& aInset);
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nsresult GetFrameSizeWithMargin(nsIFrame* aBox, nsSize& aSize);
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void PixelMarginToTwips(nsMargin& aMarginPixels);
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void GetValue(nsPresContext* aPresContext, const nsSize& a, const nsSize& b, char* value);
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void GetValue(nsPresContext* aPresContext, int32_t a, int32_t b, char* value);
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void DrawSpacer(nsPresContext* aPresContext, DrawTarget& aDrawTarget, bool aHorizontal, int32_t flex, nscoord x, nscoord y, nscoord size, nscoord spacerSize);
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void DrawLine(DrawTarget& aDrawTarget, bool aHorizontal, nscoord x1, nscoord y1, nscoord x2, nscoord y2);
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void FillRect(DrawTarget& aDrawTarget, bool aHorizontal, nscoord x, nscoord y, nscoord width, nscoord height);
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#endif
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virtual void UpdateMouseThrough();
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void CacheAttributes();
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// instance variables.
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Halignment mHalign;
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Valignment mValign;
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#ifdef DEBUG_LAYOUT
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static bool gDebug;
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static nsIFrame* mDebugChild;
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#endif
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}; // class nsBoxFrame
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#endif
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