mozilla
/
pjs
зеркало из https://github.com/mozilla/pjs.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
pjs/layout/generic/nsIFrame.h

721 строка
26 KiB
C++
Исходник Ответственный История

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsIFrame_h___
#define nsIFrame_h___
#include <stdio.h>
#include "nslayout.h"
#include "nsISupports.h"
#include "nsSize.h"
#include "nsGUIEvent.h"
#include "nsStyleStruct.h"
class nsIContent;
class nsIFrame;
class nsIPresContext;
class nsIPresShell;
class nsIRenderingContext;
class nsISizeOfHandler;
class nsISpaceManager;
class nsIStyleContext;
class nsIView;
class nsIWidget;
class nsIReflowCommand;
struct nsPoint;
struct nsRect;
struct nsReflowMetrics;
struct nsStyleStruct;
struct PRLogModuleInfo;
// IID for the nsIFrame interface
// a6cf9050-15b3-11d2-932e-00805f8add32
#define NS_IFRAME_IID \
{ 0xa6cf9050, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
/**
* Reflow metrics used to return the frame's desired size and alignment
* information.
*
* @see #Reflow()
* @see #GetReflowMetrics()
*/
struct nsReflowMetrics {
nscoord width, height; // desired width and height
nscoord ascent, descent;
// Set this to null if you don't need to compute the max element size
nsSize* maxElementSize;
// The caller of nsIFrame::Reflow will set these to the top margin
// value carried into the child frame. The child frame, if it has a
// top margin to apply will set it to the actual top margin to use.
nscoord posTopMargin; // in/out
// These values are set by the child frame indicating its bottom
// margin value.
nscoord posBottomMargin; // out
nsReflowMetrics(nsSize* aMaxElementSize) {
maxElementSize = aMaxElementSize;
posTopMargin = 0;
posBottomMargin = 0;
}
};
/**
* Constant used to indicate an unconstrained size.
*
* @see #Reflow()
*/
#define NS_UNCONSTRAINEDSIZE NS_MAXSIZE
/**
* The reason the frame is being reflowed.
*
* @see nsReflowState
*/
enum nsReflowReason {
eReflowReason_Initial = 0, // initial reflow of a newly created frame
eReflowReason_Incremental = 1, // an incremental change has occured. see the reflow command for details
eReflowReason_Resize = 2 // general request to determine a desired size
};
/**
* The type of size constraint that applies to a particular dimension.
* For the fixed and fixed content cases the min size in the reflow state
* structure is ignored and you should use the max size value when reflowing
* the frame.
*
* @see nsReflowState
*/
enum nsReflowConstraint {
eReflowSize_Unconstrained = 0, // choose whatever frame size you want
eReflowSize_Constrained = 1, // choose a frame size between the min and max sizes
eReflowSize_Fixed = 2, // frame size is fixed
eReflowSize_FixedContent = 3 // size of your content area is fixed
};
/**
* Reflow state passed to a frame during reflow. The reflow states are linked
* together. The max size represents the max available space in which to reflow
* your frame, and is computed as the parent frame's available content area
* minus any room for margins that your frame requests. The min size represents
* the min available space in which to reflow your frame
*
* @see #Reflow()
*/
struct nsReflowState {
const nsReflowState* parentReflowState; // pointer to parent's reflow state
nsIFrame* frame; // the frame being reflowed
nsReflowReason reason; // the reason for the reflow
nsIReflowCommand* reflowCommand; // only used for incremental changes
nsReflowConstraint widthConstraint; // constraint that applies to width dimension
nsReflowConstraint heightConstraint; // constraint that applies to height dimension
nsSize maxSize; // the max available space in which to reflow
nsSize minSize; // the min available space in which to reflow.
// Only used for eReflowSize_Constrained
// Constructs an initial reflow state (no parent reflow state) for a
// non-incremental reflow command
nsReflowState(nsIFrame* aFrame,
nsReflowReason aReason,
const nsSize& aMaxSize);
// Constructs an initial reflow state (no parent reflow state) for an
// incremental reflow command
nsReflowState(nsIFrame* aFrame,
nsIReflowCommand& aReflowCommand,
const nsSize& aMaxSize);
// Construct a reflow state for the given frame, parent reflow state, and
// max size. Uses the reflow reason and reflow command from the parent's
// reflow state
nsReflowState(nsIFrame* aFrame,
const nsReflowState& aParentReflowState,
const nsSize& aMaxSize);
// Constructs a reflow state that overrides the reflow reason of the parent
// reflow state. Sets the reflow command to NULL
nsReflowState(nsIFrame* aFrame,
const nsReflowState& aParentReflowState,
const nsSize& aMaxSize,
nsReflowReason aReflowReason);
};
//----------------------------------------------------------------------
/**
* Reflow status returned by the reflow methods.
*
* NS_FRAME_NOT_COMPLETE bit flag means the frame does not map all its
* content, and that the parent frame should create a continuing frame.
* If this bit isn't set it means the frame does map all its content.
*
* NS_FRAME_REFLOW_NEXTINFLOW bit flag means that the next-in-flow is
* dirty, and also needs to be reflowed. This status only makes sense
* for a frame that is not complete, i.e. you wouldn't set both
* NS_FRAME_COMPLETE and NS_FRAME_REFLOW_NEXTINFLOW
*
* The low 8 bits of the nsReflowStatus are reserved for future extensions;
* the remaining 24 bits are zero (and available for extensions; however
* API's that accept/return nsReflowStatus must not receive/return any
* extension bits).
*
* @see #Reflow()
* @see #CreateContinuingFrame()
*/
typedef PRUint32 nsReflowStatus;
#define NS_FRAME_COMPLETE 0 // Note: not a bit!
#define NS_FRAME_NOT_COMPLETE 0x1
#define NS_FRAME_REFLOW_NEXTINFLOW 0x2
#define NS_FRAME_IS_COMPLETE(status) \
(0 == ((status) & NS_FRAME_NOT_COMPLETE))
#define NS_FRAME_IS_NOT_COMPLETE(status) \
(0 != ((status) & NS_FRAME_NOT_COMPLETE))
// This macro tests to see if an nsReflowStatus is an error value
// or just a regular return value
#define NS_IS_REFLOW_ERROR(_status) (PRInt32(_status) < 0)
//----------------------------------------------------------------------
/**
* Indication of how the frame can be split. This is used when doing runaround
* of floaters, and when pulling up child frames from a next-in-flow.
*
* The choices are splittable, not splittable at all, and splittable in
* a non-rectangular fashion. This last type only applies to block-level
* elements, and indicates whether splitting can be used when doing runaround.
* If you can split across page boundaries, but you expect each continuing
* frame to be the same width then return frSplittable and not
* frSplittableNonRectangular.
*
* @see #IsSplittable()
*/
typedef PRUint32 nsSplittableType;
#define NS_FRAME_NOT_SPLITTABLE 0 // Note: not a bit!
#define NS_FRAME_SPLITTABLE 0x1
#define NS_FRAME_SPLITTABLE_NON_RECTANGULAR 0x3
#define NS_FRAME_IS_SPLITTABLE(type)\
(0 != ((type) & NS_FRAME_SPLITTABLE))
#define NS_FRAME_IS_NOT_SPLITTABLE(type)\
(0 == ((type) & NS_FRAME_SPLITTABLE))
//----------------------------------------------------------------------
/**
* Frame state bits. Any bits not listed here are reserved for future
* extensions, but must be stored by the frames.
*/
typedef PRUint32 nsFrameState;
#define NS_FRAME_IN_REFLOW 0x00000001
// This bit is set when a frame is created. After it has been reflowed
// once (during the DidReflow with a finished state) the bit is
// cleared.
#define NS_FRAME_FIRST_REFLOW 0x00000002
//----------------------------------------------------------------------
/**
* DidReflow status values.
*/
typedef PRBool nsDidReflowStatus;
#define NS_FRAME_REFLOW_NOT_FINISHED PR_FALSE
#define NS_FRAME_REFLOW_FINISHED PR_TRUE
//----------------------------------------------------------------------
/**
* A frame in the layout model. This interface is supported by all frame
* objects.
*
* Frames are NOT reference counted. Use the DeleteFrame() member function
* to delete a frame
*/
class nsIFrame : private nsISupports
{
public:
/**
* QueryInterface() defined in nsISupports. This is the only member
* function of nsISupports that is public.
*/
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr) = 0;
/**
* Add this object's size information to the sizeof handler. Note that
* this does <b>not</b> add in the size of content, style, or view's
* (those are sized seperately).
*/
NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler) const = 0;
/**
* Deletes this frame and each of its child frames (recursively calls
* DeleteFrame() for each child)
*/
NS_IMETHOD DeleteFrame() = 0;
/**
* Get the content object associated with this frame. Adds a reference to
* the content object so the caller must do a release.
*
* @see nsISupports#Release()
*/
NS_IMETHOD GetContent(nsIContent*& aContent) const = 0;
/**
* Get the index in parent of the frame's content object
*/
NS_IMETHOD GetContentIndex(PRInt32& aIndexInParent) const = 0;
/**
* Get the style context associated with this frame. Note that GetStyleContext()
* adds a reference to the style context so the caller must do a release.
*
* @see nsISupports#Release()
*/
NS_IMETHOD GetStyleContext(nsIPresContext* aContext,
nsIStyleContext*& aStyleContext) = 0;
NS_IMETHOD SetStyleContext(nsIPresContext* aPresContext,
nsIStyleContext* aContext) = 0;
/**
* Get the style data associated with this frame
*/
NS_IMETHOD GetStyleData(nsStyleStructID aSID, const nsStyleStruct*& aStyleStruct) const = 0;
/**
* Accessor functions for geometric and content parent.
*/
NS_IMETHOD GetContentParent(nsIFrame*& aParent) const = 0;
NS_IMETHOD SetContentParent(const nsIFrame* aParent) = 0;
NS_IMETHOD GetGeometricParent(nsIFrame*& aParent) const = 0;
NS_IMETHOD SetGeometricParent(const nsIFrame* aParent) = 0;
/**
* Bounding rect of the frame. The values are in twips, and the origin is
* relative to the upper-left of the geometric parent. The size includes the
* content area, borders, and padding.
*/
NS_IMETHOD GetRect(nsRect& aRect) const = 0;
NS_IMETHOD GetOrigin(nsPoint& aPoint) const = 0;
NS_IMETHOD GetSize(nsSize& aSize) const = 0;
NS_IMETHOD SetRect(const nsRect& aRect) = 0;
NS_IMETHOD MoveTo(nscoord aX, nscoord aY) = 0;
NS_IMETHOD SizeTo(nscoord aWidth, nscoord aHeight) = 0;
/**
* Child frame enumeration
*/
NS_IMETHOD ChildCount(PRInt32& aChildCount) const = 0;
NS_IMETHOD ChildAt(PRInt32 aIndex, nsIFrame*& aFrame) const = 0;
NS_IMETHOD IndexOf(const nsIFrame* aChild, PRInt32& aIndex) const = 0;
NS_IMETHOD FirstChild(nsIFrame*& aFirstChild) const = 0;
NS_IMETHOD NextChild(const nsIFrame* aChild, nsIFrame*& aNextChild) const = 0;
NS_IMETHOD PrevChild(const nsIFrame* aChild, nsIFrame*& aPrevChild) const = 0;
NS_IMETHOD LastChild(nsIFrame*& aLastChild) const = 0;
/**
* Painting
*/
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect) = 0;
/**
* Handle an event.
*/
NS_IMETHOD HandleEvent(nsIPresContext& aPresContext,
nsGUIEvent* aEvent,
nsEventStatus& aEventStatus) = 0;
/**
* Get the cursor for a given point in the frame tree. The
* call returns the desired cursor (or NS_STYLE_CURSOR_INHERIT if
* no cursor is wanted). In addition, if a cursor is desired
* then *aFrame is set to the frame that wants the cursor.
*/
NS_IMETHOD GetCursorAndContentAt(nsIPresContext& aPresContext,
const nsPoint& aPoint,
nsIFrame** aFrame,
nsIContent** aContent,
PRInt32& aCursor) = 0;
/**
* Get the current frame-state value for this frame. aResult is
* filled in with the state bits. The return value has no
* meaning.
*/
NS_IMETHOD GetFrameState(nsFrameState& aResult) = 0;
/**
* Set the current frame-state value for this frame. The return
* value has no meaning.
*/
NS_IMETHOD SetFrameState(nsFrameState aNewState) = 0;
/**
* Pre-reflow hook. Before a frame is incrementally reflowed or
* resize-reflowed this method will be called warning the frame of
* the impending reflow. This call may be invoked zero or more times
* before a subsequent DidReflow call. This method when called the
* first time will set the NS_FRAME_IN_REFLOW bit in the frame
* state bits.
*/
NS_IMETHOD WillReflow(nsIPresContext& aPresContext) = 0;
/**
* The frame is given a maximum size and asked for its desired size.
* This is the frame's opportunity to reflow its children.
*
* @param aDesiredSize <i>out</i> parameter where you should return the
* desired size and ascent/descent info. You should include any
* space you want for border/padding in the desired size you return.
*
* It's okay to return a desired size that exceeds the max
* size if that's the smallest you can be, i.e. it's your
* minimum size.
*
* maxElementSize is an optional parameter for returning your
* maximum element size. If may be null in which case you
* don't have to compute a maximum element size. The
* maximum element size must be less than or equal to your
* desired size.
*
* @param aReflowState information about your reflow including the reason
* for the reflow and the available space in which to lay out. Each
* dimension of the available space can either be constrained or
* unconstrained (a value of NS_UNCONSTRAINEDSIZE). If constrained
* you should choose a value that's less than or equal to the
* constrained size. If unconstrained you can choose as
* large a value as you like.
*
* Note that the available space can be negative. In this case you
* still must return an accurate desired size. If you're a container
* you must <b>always</b> reflow at least one frame regardless of the
* available space
*/
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus) = 0;
/**
* Post-reflow hook. After a frame is incrementally reflowed or
* resize-reflowed this method will be called telling the frame of
* the outcome. This call may be invoked many times, while
* NS_FRAME_IN_REFLOW is set, before it is finally called once with
* a NS_FRAME_REFLOW_COMPLETE value. When called with a
* NS_FRAME_REFLOW_COMPLETE value the NS_FRAME_IN_REFLOW bit in the
* frame state will be cleared.
*/
NS_IMETHOD DidReflow(nsIPresContext& aPresContext,
nsDidReflowStatus aStatus) = 0;
/**
* This call is invoked when content is appended to the content tree.
*
* This frame is the frame that maps the content object that has appended
* content. A typical response to this notification is to generate a
* FrameAppended incremental reflow command. You then handle the incremental
* reflow command by creating frames for the appended content.
*/
NS_IMETHOD ContentAppended(nsIPresShell* aShell,
nsIPresContext* aPresContext,
nsIContent* aContainer) = 0;
/**
* This call is invoked when content is inserted in the content
* tree.
*
* This frame is the frame that maps the content object that has inserted
* content. A typical response to this notification is to update the
* index-in-parent values for the affected child frames, create and insert
* new frame(s), and generate a FrameInserted incremental reflow command.
*
* You respond to the incremental reflow command by reflowing the newly
* inserted frame and any impacted frames.
*
* @param aIndexInParent the index in the content container where
* the new content was inserted.
*/
NS_IMETHOD ContentInserted(nsIPresShell* aShell,
nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInParent) = 0;
/**
* This call is invoked when content is replaced in the content
* tree. The container frame that maps that content is asked to deal
* with the replaced content by deleting old frames and then
* creating new frames and updating the index-in-parent values for
* it's affected children. In addition, the call must generate
* reflow commands that will incrementally reflow and repair the
* damaged portion of the frame tree.
*
* @param aIndexInParent the index in the content container where
* the new content was inserted. */
NS_IMETHOD ContentReplaced(nsIPresShell* aShell,
nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInParent) = 0;
/**
* This call is invoked when content is deleted from the content
* tree. The container frame that maps that content is asked to deal
* with the deleted content by deleting frames and updating the
* index-in-parent values for it's affected children. In addition,
* the call must generate reflow commands that will incrementally
* reflow and repair the damaged portion of the frame tree.
*
* @param aIndexInParent the index in the content container where
* the new content was deleted.
*/
NS_IMETHOD ContentDeleted(nsIPresShell* aShell,
nsIPresContext* aPresContext,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInParent) = 0;
/**
* This call is invoked when content is changed in the content tree.
* The first frame that maps that content is asked to deal with the
* change by generating an incremental reflow command.
*
* @param aIndexInParent the index in the content container where
* the new content was deleted.
*/
NS_IMETHOD ContentChanged(nsIPresShell* aShell,
nsIPresContext* aPresContext,
nsIContent* aChild,
nsISupports* aSubContent) = 0;
/**
* Return the reflow metrics for this frame. If the frame is a
* container then the values for ascent and descent are computed
* across the the various children in the appropriate manner
* (e.g. for a line frame the ascent value would be the maximum
* ascent of the line's children). Note that the metrics returned
* apply to the frame as it exists at the time of the call.
*/
NS_IMETHOD GetReflowMetrics(nsIPresContext& aPresContext,
nsReflowMetrics& aMetrics) = 0;
/**
* Return how your frame can be split.
*/
NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const = 0;
/**
* Flow member functions. CreateContinuingFrame() is responsible for
* appending the continuing frame to the flow.
*/
NS_IMETHOD CreateContinuingFrame(nsIPresContext& aPresContext,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsIFrame*& aContinuingFrame) = 0;
NS_IMETHOD GetPrevInFlow(nsIFrame*& aPrevInFlow) const = 0;
NS_IMETHOD SetPrevInFlow(nsIFrame*) = 0;
NS_IMETHOD GetNextInFlow(nsIFrame*& aNextInFlow) const = 0;
NS_IMETHOD SetNextInFlow(nsIFrame*) = 0;
NS_IMETHOD AppendToFlow(nsIFrame* aAfterFrame) = 0;
NS_IMETHOD PrependToFlow(nsIFrame* aBeforeFrame) = 0;
NS_IMETHOD RemoveFromFlow() = 0;
NS_IMETHOD BreakFromPrevFlow() = 0;
NS_IMETHOD BreakFromNextFlow() = 0;
/**
* Accessor functions to get/set the associated view object
*/
NS_IMETHOD GetView(nsIView*& aView) const = 0; // may be null
NS_IMETHOD SetView(nsIView* aView) = 0;
/**
* Find the first geometric parent that has a view
*/
NS_IMETHOD GetParentWithView(nsIFrame*& aParent) const = 0;
/**
* Returns the offset from this frame to the closest geometric parent that
* has a view. Also returns the containing view or null in case of error
*/
NS_IMETHOD GetOffsetFromView(nsPoint& aOffset, nsIView*& aView) const = 0;
/**
* Returns the window that contains this frame. If this frame has a
* view and the view has a window, then this frames window is
* returned, otherwise this frame's geometric parent is checked
* recursively upwards.
*/
NS_IMETHOD GetWindow(nsIWidget*&) const = 0;
/**
* Is this frame a "containing block"?
*/
NS_IMETHOD IsPercentageBase(PRBool& aBase) const = 0;
/**
* Gets the size of an "auto" margin.
*/
NS_IMETHOD GetAutoMarginSize(PRUint8 aSide, nscoord& aSize) const = 0;
/**
* Sibling pointer used to link together frames
*/
NS_IMETHOD GetNextSibling(nsIFrame*& aNextSibling) const = 0;
NS_IMETHOD SetNextSibling(nsIFrame* aNextSibling) = 0;
/**
* Does this frame have content that is considered "transparent"?
* This is binary transparency as opposed to translucency. MMP
*/
NS_IMETHOD IsTransparent(PRBool& aTransparent) const = 0;
// Debugging
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const= 0;
NS_IMETHOD ListTag(FILE* out = stdout) const = 0;
NS_IMETHOD VerifyTree() const = 0;
/**
* See if tree verification is enabled. To enable tree verification add
* "frameverifytree:1" to your NSPR_LOG_MODULES environment variable
* (any non-zero debug level will work). Or, call SetVerifyTreeEnable
* with PR_TRUE.
*/
static NS_LAYOUT PRBool GetVerifyTreeEnable();
/**
* Set the verify-tree enable flag.
*/
static NS_LAYOUT void SetVerifyTreeEnable(PRBool aEnabled);
/**
* The frame class and related classes share an nspr log module
* for logging frame activity.
*
* Note: the log module is created during library initialization which
* means that you cannot perform logging before then.
*/
static NS_LAYOUT PRLogModuleInfo* GetLogModuleInfo();
// Show frame borders when rendering
static NS_LAYOUT void ShowFrameBorders(PRBool aEnable);
static NS_LAYOUT PRBool GetShowFrameBorders();
protected:
static NS_LAYOUT PRLogModuleInfo* gLogModule;
};
// Constructs an initial reflow state (no parent reflow state) for a
// non-incremental reflow command
inline nsReflowState::nsReflowState(nsIFrame* aFrame,
nsReflowReason aReason,
const nsSize& aMaxSize)
{
NS_PRECONDITION(aReason != eReflowReason_Incremental, "unexpected reflow reason");
#ifdef NS_DEBUG
nsIFrame* parent;
aFrame->GetGeometricParent(parent);
NS_PRECONDITION(nsnull == parent, "not root frame");
#endif
reason = aReason;
reflowCommand = nsnull;
maxSize = aMaxSize;
parentReflowState = nsnull;
frame = aFrame;
widthConstraint = eReflowSize_Constrained;
heightConstraint = eReflowSize_Constrained;
minSize.width = 0;
minSize.height = 0;
}
// Constructs an initial reflow state (no parent reflow state) for an
// incremental reflow command
inline nsReflowState::nsReflowState(nsIFrame* aFrame,
nsIReflowCommand& aReflowCommand,
const nsSize& aMaxSize)
{
#ifdef NS_DEBUG
nsIFrame* parent;
aFrame->GetGeometricParent(parent);
NS_PRECONDITION(nsnull == parent, "not root frame");
#endif
reason = eReflowReason_Incremental;
reflowCommand = &aReflowCommand;
maxSize = aMaxSize;
parentReflowState = nsnull;
frame = aFrame;
widthConstraint = eReflowSize_Constrained;
heightConstraint = eReflowSize_Constrained;
minSize.width = 0;
minSize.height = 0;
}
// Construct a reflow state for the given frame, parent reflow state, and
// max size. Uses the reflow reason and reflow command from the parent's
// reflow state
inline nsReflowState::nsReflowState(nsIFrame* aFrame,
const nsReflowState& aParentReflowState,
const nsSize& aMaxSize)
{
reason = aParentReflowState.reason;
reflowCommand = aParentReflowState.reflowCommand;
maxSize = aMaxSize;
parentReflowState = &aParentReflowState;
frame = aFrame;
widthConstraint = eReflowSize_Constrained;
heightConstraint = eReflowSize_Constrained;
minSize.width = 0;
minSize.height = 0;
}
// Constructs a reflow state that overrides the reflow reason of the parent
// reflow state. Sets the reflow command to NULL
inline nsReflowState::nsReflowState(nsIFrame* aFrame,
const nsReflowState& aParentReflowState,
const nsSize& aMaxSize,
nsReflowReason aReflowReason)
{
reason = aReflowReason;
reflowCommand = nsnull;
maxSize = aMaxSize;
parentReflowState = &aParentReflowState;
frame = aFrame;
widthConstraint = eReflowSize_Constrained;
heightConstraint = eReflowSize_Constrained;
minSize.width = 0;
minSize.height = 0;
}
#endif /* nsIFrame_h___ */
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку