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Added a new method to allow a frame to specify the frame that provides its parent style context. b=45210 r=karnaze

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attinasi%netscape.com 2000-09-12 22:45:33 +00:00
parent b73a266b15
commit 33c7174943
2 changed files with 54 additions and 0 deletions
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27
layout/base/public/nsIFrame.h
View File

@ -217,6 +217,11 @@ enum nsSpread {
eSpreadDown = 2
};
enum nsContextProviderRelationship {
eContextProvider_Ancestor = 0,
eContextProvider_Descendant = 1
};
//----------------------------------------------------------------------
// Option flags
@ -1063,6 +1068,28 @@ public:
*/
NS_IMETHOD ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild) = 0;
/**
* Called in style ReResolution to get the frame that contains the style context that is the
* parent style context for this frame.
* @param aProviderFrame: set to the frame who's style context is to be used as the parent context
* in reresolving style for this frame. Note that this may or may not be the
* parent frame of this frame.
* @param aRelatioship : indicates how the provider frame relates to this frame:
* i.e. if the parent context provider frame is a child of this frame,
* then aRelationship must be set to eContextProvider_Descendant,
* if a parent, grandparent etc. set to eContextProvider_Ancestor
* (this is used to control recursion in style reresolution)
*
* if return value is NS_OK then aProvdierFrame must be set, otherwise it is ignored.
*
* PRECONDITIONS: aProviderFrame cannot be null
* POSTCONDITIONS: *aProfiderFrame will be a valid frame if this routine succeeds
* aRelationship will be set to a legal enum value indicating the correct relationship
*/
NS_IMETHOD GetParentStyleContextProvider(nsIPresContext* aPresContext,
nsIFrame** aProviderFrame,
nsContextProviderRelationship& aRelationship) = 0;
private:
NS_IMETHOD_(nsrefcnt) AddRef(void) = 0;
NS_IMETHOD_(nsrefcnt) Release(void) = 0;

27
layout/generic/nsIFrame.h
View File

@ -217,6 +217,11 @@ enum nsSpread {
eSpreadDown = 2
};
enum nsContextProviderRelationship {
eContextProvider_Ancestor = 0,
eContextProvider_Descendant = 1
};
//----------------------------------------------------------------------
// Option flags
@ -1063,6 +1068,28 @@ public:
*/
NS_IMETHOD ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild) = 0;
/**
* Called in style ReResolution to get the frame that contains the style context that is the
* parent style context for this frame.
* @param aProviderFrame: set to the frame who's style context is to be used as the parent context
* in reresolving style for this frame. Note that this may or may not be the
* parent frame of this frame.
* @param aRelatioship : indicates how the provider frame relates to this frame:
* i.e. if the parent context provider frame is a child of this frame,
* then aRelationship must be set to eContextProvider_Descendant,
* if a parent, grandparent etc. set to eContextProvider_Ancestor
* (this is used to control recursion in style reresolution)
*
* if return value is NS_OK then aProvdierFrame must be set, otherwise it is ignored.
*
* PRECONDITIONS: aProviderFrame cannot be null
* POSTCONDITIONS: *aProfiderFrame will be a valid frame if this routine succeeds
* aRelationship will be set to a legal enum value indicating the correct relationship
*/
NS_IMETHOD GetParentStyleContextProvider(nsIPresContext* aPresContext,
nsIFrame** aProviderFrame,
nsContextProviderRelationship& aRelationship) = 0;
private:
NS_IMETHOD_(nsrefcnt) AddRef(void) = 0;
NS_IMETHOD_(nsrefcnt) Release(void) = 0;