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gecko-dev
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gecko-dev/layout/xul/nsBoxFrame.h

263 строки
11 KiB
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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/. */
/**
Eric D Vaughan
nsBoxFrame is a frame that can lay its children out either vertically or horizontally.
It lays them out according to a min max or preferred size.
**/
#ifndef nsBoxFrame_h___
#define nsBoxFrame_h___
#include "mozilla/Attributes.h"
#include "nsCOMPtr.h"
#include "nsContainerFrame.h"
#include "nsBoxLayout.h"
class nsBoxLayoutState;
// flags from box
#define NS_STATE_BOX_CHILD_RESERVED NS_FRAME_STATE_BIT(20)
#define NS_STATE_STACK_NOT_POSITIONED NS_FRAME_STATE_BIT(21)
//#define NS_STATE_IS_HORIZONTAL NS_FRAME_STATE_BIT(22) moved to nsIFrame.h
#define NS_STATE_AUTO_STRETCH NS_FRAME_STATE_BIT(23)
//#define NS_STATE_IS_ROOT NS_FRAME_STATE_BIT(24) moved to nsBox.h
#define NS_STATE_CURRENTLY_IN_DEBUG NS_FRAME_STATE_BIT(25)
//#define NS_STATE_SET_TO_DEBUG NS_FRAME_STATE_BIT(26) moved to nsBox.h
//#define NS_STATE_DEBUG_WAS_SET NS_FRAME_STATE_BIT(27) moved to nsBox.h
#define NS_STATE_MENU_HAS_POPUP_LIST NS_FRAME_STATE_BIT(28) /* used on nsMenuFrame */
#define NS_STATE_BOX_WRAPS_KIDS_IN_BLOCK NS_FRAME_STATE_BIT(29)
#define NS_STATE_EQUAL_SIZE NS_FRAME_STATE_BIT(30)
//#define NS_STATE_IS_DIRECTION_NORMAL NS_FRAME_STATE_BIT(31) moved to nsIFrame.h
#define NS_FRAME_MOUSE_THROUGH_ALWAYS NS_FRAME_STATE_BIT(60)
#define NS_FRAME_MOUSE_THROUGH_NEVER NS_FRAME_STATE_BIT(61)
nsIFrame* NS_NewBoxFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext,
bool aIsRoot,
nsBoxLayout* aLayoutManager);
nsIFrame* NS_NewBoxFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext);
class nsBoxFrame : public nsContainerFrame
{
public:
NS_DECL_FRAMEARENA_HELPERS
friend nsIFrame* NS_NewBoxFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext,
bool aIsRoot,
nsBoxLayout* aLayoutManager);
friend nsIFrame* NS_NewBoxFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext);
// gets the rect inside our border and debug border. If you wish to paint inside a box
// call this method to get the rect so you don't draw on the debug border or outer border.
virtual void SetLayoutManager(nsBoxLayout* aLayout) MOZ_OVERRIDE { mLayoutManager = aLayout; }
virtual nsBoxLayout* GetLayoutManager() MOZ_OVERRIDE { return mLayoutManager; }
NS_IMETHOD RelayoutChildAtOrdinal(nsBoxLayoutState& aState, nsIFrame* aChild) MOZ_OVERRIDE;
virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
virtual nsSize GetMaxSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
virtual nscoord GetFlex(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
virtual nscoord GetBoxAscent(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
#ifdef DEBUG_LAYOUT
NS_IMETHOD SetDebug(nsBoxLayoutState& aBoxLayoutState, bool aDebug) MOZ_OVERRIDE;
NS_IMETHOD GetDebug(bool& aDebug) MOZ_OVERRIDE;
#endif
virtual Valignment GetVAlign() const MOZ_OVERRIDE { return mValign; }
virtual Halignment GetHAlign() const MOZ_OVERRIDE { return mHalign; }
NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;
virtual bool ComputesOwnOverflowArea() MOZ_OVERRIDE { return false; }
// ----- child and sibling operations ---
// ----- public methods -------
virtual void Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* asPrevInFlow) MOZ_OVERRIDE;
NS_IMETHOD AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) MOZ_OVERRIDE;
virtual void MarkIntrinsicWidthsDirty() MOZ_OVERRIDE;
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus) MOZ_OVERRIDE;
NS_IMETHOD AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) MOZ_OVERRIDE;
NS_IMETHOD InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList) MOZ_OVERRIDE;
NS_IMETHOD RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame) MOZ_OVERRIDE;
virtual nsIFrame* GetContentInsertionFrame() MOZ_OVERRIDE;
NS_IMETHOD SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) MOZ_OVERRIDE;
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) MOZ_OVERRIDE;
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
{
// record that children that are ignorable whitespace should be excluded
// (When content was loaded via the XUL content sink, it's already
// been excluded, but we need this for when the XUL namespace is used
// in other MIME types or when the XUL CSS display types are used with
// non-XUL elements.)
// This is bogus, but it's what we've always done.
// (Given that we're replaced, we need to say we're a replaced element
// that contains a block so nsHTMLReflowState doesn't tell us to be
// NS_INTRINSICSIZE wide.)
return nsContainerFrame::IsFrameOfType(aFlags &
~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock | eXULBox |
nsIFrame::eExcludesIgnorableWhitespace));
}
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
#endif
NS_IMETHOD DidReflow(nsPresContext* aPresContext,
const nsHTMLReflowState* aReflowState,
nsDidReflowStatus aStatus) MOZ_OVERRIDE;
virtual bool HonorPrintBackgroundSettings() MOZ_OVERRIDE;
virtual ~nsBoxFrame();
nsBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, bool aIsRoot = false, nsBoxLayout* aLayoutManager = nullptr);
// virtual so nsStackFrame, nsButtonBoxFrame, nsSliderFrame and nsMenuFrame
// can override it
virtual void BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) MOZ_OVERRIDE;
#ifdef DEBUG_LAYOUT
virtual void SetDebugOnChildList(nsBoxLayoutState& aState, nsIFrame* aChild, bool aDebug);
nsresult DisplayDebugInfoFor(nsIFrame* aBox,
nsPoint& aPoint);
#endif
static nsresult LayoutChildAt(nsBoxLayoutState& aState, nsIFrame* aBox, const nsRect& aRect);
/**
* Utility method to redirect events on descendants to this frame.
* Supports 'allowevents' attribute on descendant elements to allow those
* elements and their descendants to receive events.
*/
void WrapListsInRedirector(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aIn,
const nsDisplayListSet& aOut);
/**
* This defaults to true, but some box frames (nsListBoxBodyFrame for
* example) don't support ordinals in their children.
*/
virtual bool SupportsOrdinalsInChildren();
protected:
#ifdef DEBUG_LAYOUT
virtual void GetBoxName(nsAutoString& aName) MOZ_OVERRIDE;
void PaintXULDebugBackground(nsRenderingContext& aRenderingContext,
nsPoint aPt);
void PaintXULDebugOverlay(nsRenderingContext& aRenderingContext,
nsPoint aPt);
#endif
virtual bool GetInitialEqualSize(bool& aEqualSize);
virtual void GetInitialOrientation(bool& aIsHorizontal);
virtual void GetInitialDirection(bool& aIsNormal);
virtual bool GetInitialHAlignment(Halignment& aHalign);
virtual bool GetInitialVAlignment(Valignment& aValign);
virtual bool GetInitialAutoStretch(bool& aStretch);
virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
nsSize mPrefSize;
nsSize mMinSize;
nsSize mMaxSize;
nscoord mFlex;
nscoord mAscent;
nsCOMPtr<nsBoxLayout> mLayoutManager;
// Get the point associated with this event. Returns true if a single valid
// point was found. Otherwise false.
bool GetEventPoint(mozilla::WidgetGUIEvent* aEvent, nsPoint& aPoint);
// Gets the event coordinates relative to the widget offset associated with
// this frame. Return true if a single valid point was found.
bool GetEventPoint(mozilla::WidgetGUIEvent* aEvent, nsIntPoint& aPoint);
protected:
void RegUnregAccessKey(bool aDoReg);
NS_HIDDEN_(void) CheckBoxOrder();
private:
#ifdef DEBUG_LAYOUT
nsresult SetDebug(nsPresContext* aPresContext, bool aDebug);
bool GetInitialDebug(bool& aDebug);
void GetDebugPref(nsPresContext* aPresContext);
void GetDebugBorder(nsMargin& aInset);
void GetDebugPadding(nsMargin& aInset);
void GetDebugMargin(nsMargin& aInset);
nsresult GetFrameSizeWithMargin(nsIFrame* aBox, nsSize& aSize);
void PixelMarginToTwips(nsPresContext* aPresContext, nsMargin& aMarginPixels);
void GetValue(nsPresContext* aPresContext, const nsSize& a, const nsSize& b, char* value);
void GetValue(nsPresContext* aPresContext, int32_t a, int32_t b, char* value);
void DrawSpacer(nsPresContext* aPresContext, nsRenderingContext& aRenderingContext, bool aHorizontal, int32_t flex, nscoord x, nscoord y, nscoord size, nscoord spacerSize);
void DrawLine(nsRenderingContext& aRenderingContext, bool aHorizontal, nscoord x1, nscoord y1, nscoord x2, nscoord y2);
void FillRect(nsRenderingContext& aRenderingContext, bool aHorizontal, nscoord x, nscoord y, nscoord width, nscoord height);
#endif
virtual void UpdateMouseThrough();
void CacheAttributes();
// instance variables.
Halignment mHalign;
Valignment mValign;
#ifdef DEBUG_LAYOUT
static bool gDebug;
static nsIFrame* mDebugChild;
#endif
}; // class nsBoxFrame
#endif
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