gecko-dev/layout/generic/nsInlineFrame.h

235 lines
8.5 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* rendering object for CSS display:inline objects */
#ifndef nsInlineFrame_h___
#define nsInlineFrame_h___
#include "nsHTMLContainerFrame.h"
#include "nsAbsoluteContainingBlock.h"
#include "nsLineLayout.h"
#include "nsLayoutAtoms.h"
class nsAnonymousBlockFrame;
#define NS_INLINE_FRAME_CID \
{ 0xa6cf90e0, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
#define nsInlineFrameSuper nsHTMLContainerFrame
#define NS_INLINE_FRAME_CONTAINS_PERCENT_AWARE_CHILD 0x00100000
// NS_INLINE_FRAME_HARD_TEXT_OFFSETS is used for access keys, where what
// would normally be 1 text frame is split into 3 sets of an inline parent
// and text child (the pre access key text, the underlined key text, and
// the post access key text). The offsets of the 3 text frame children
// are set in nsCSSFrameConstructor
#define NS_INLINE_FRAME_HARD_TEXT_OFFSETS 0x00200000
/**
* Inline frame class.
*
* This class manages a list of child frames that are inline frames. Working with
* nsLineLayout, the class will reflow and place inline frames on a line.
*/
class nsInlineFrame : public nsInlineFrameSuper
{
public:
friend nsIFrame* NS_NewInlineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
// nsISupports overrides
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
// nsIFrame overrides
NS_IMETHOD AppendFrames(nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList);
NS_IMETHOD RemoveFrame(nsIAtom* aListName,
nsIFrame* aOldFrame);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
NS_IMETHOD ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild);
#ifdef ACCESSIBILITY
NS_IMETHODIMP GetAccessible(nsIAccessible** aAccessible);
#endif
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
virtual nsIAtom* GetType() const;
virtual PRBool IsEmpty();
virtual PRBool IsSelfEmpty();
// nsIHTMLReflow overrides
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD CanContinueTextRun(PRBool& aContinueTextRun) const;
// Take all of the frames away from this frame. The caller is
// presumed to keep them alive.
void StealAllFrames() {
mFrames.SetFrames(nsnull);
}
protected:
// Additional reflow state used during our reflow methods
struct InlineReflowState {
nsIFrame* mPrevFrame;
nsInlineFrame* mNextInFlow;
PRPackedBool mSetParentPointer; // when reflowing child frame first set its
// parent frame pointer
InlineReflowState() {
mPrevFrame = nsnull;
mNextInFlow = nsnull;
mSetParentPointer = PR_FALSE;
};
};
nsInlineFrame(nsStyleContext* aContext) : nsInlineFrameSuper(aContext) {}
virtual PRIntn GetSkipSides() const;
nsresult ReflowFrames(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
InlineReflowState& rs,
nsHTMLReflowMetrics& aMetrics,
nsReflowStatus& aStatus);
nsresult ReflowInlineFrame(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
InlineReflowState& rs,
nsIFrame* aFrame,
nsReflowStatus& aStatus);
virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
InlineReflowState& rs,
PRBool* aIsComplete);
virtual void PushFrames(nsPresContext* aPresContext,
nsIFrame* aFromChild,
nsIFrame* aPrevSibling);
};
//----------------------------------------------------------------------
/**
* Variation on inline-frame used to manage lines for line layout in
* special situations (:first-line style in particular).
*/
class nsFirstLineFrame : public nsInlineFrame {
public:
friend nsIFrame* NS_NewFirstLineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
virtual nsIAtom* GetType() const;
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
// Take frames starting at aFrame until the end of the frame-list
// away from this frame. The caller is presumed to keep them alive.
void StealFramesFrom(nsIFrame* aFrame);
protected:
nsFirstLineFrame(nsStyleContext* aContext) : nsInlineFrame(aContext) {}
virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
InlineReflowState& rs,
PRBool* aIsComplete);
};
//----------------------------------------------------------------------
// Derived class created for relatively positioned inline-level elements
// that acts as a containing block for child absolutely positioned
// elements
class nsPositionedInlineFrame : public nsInlineFrame
{
public:
nsPositionedInlineFrame(nsStyleContext* aContext) : nsInlineFrame(aContext) {}
virtual ~nsPositionedInlineFrame() { } // useful for debugging
virtual void Destroy();
NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD AppendFrames(nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList);
NS_IMETHOD RemoveFrame(nsIAtom* aListName,
nsIFrame* aOldFrame);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
virtual nsIAtom* GetAdditionalChildListName(PRInt32 aIndex) const;
virtual nsIFrame* GetFirstChild(nsIAtom* aListName) const;
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
virtual nsIAtom* GetType() const;
protected:
nsAbsoluteContainingBlock mAbsoluteContainer;
};
#endif /* nsInlineFrame_h___ */