зеркало из https://github.com/mozilla/gecko-dev.git
288 строки
11 KiB
C++
288 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* rendering object for CSS display:inline objects */
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#ifndef nsInlineFrame_h___
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#define nsInlineFrame_h___
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#include "nsHTMLContainerFrame.h"
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#include "nsAbsoluteContainingBlock.h"
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#include "nsLineLayout.h"
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class nsAnonymousBlockFrame;
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#define NS_INLINE_FRAME_CID \
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{ 0x88b298af, 0x8b0e, 0x4592,{0x9e, 0xc6, 0xea, 0x4c, 0x4b, 0x3f, 0xf7, 0xa4}}
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#define nsInlineFrameSuper nsHTMLContainerFrame
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// NS_INLINE_FRAME_HARD_TEXT_OFFSETS is used for access keys, where what
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// would normally be 1 text frame is split into 3 sets of an inline parent
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// and text child (the pre access key text, the underlined key text, and
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// the post access key text). The offsets of the 3 text frame children
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// are set in nsCSSFrameConstructor
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#define NS_INLINE_FRAME_HARD_TEXT_OFFSETS 0x00100000
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/** In Bidi left (or right) margin/padding/border should be applied to left
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* (or right) most frame (or a continuation frame).
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* This state value shows if this frame is left (or right) most continuation
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* or not.
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*/
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#define NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET 0x00200000
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#define NS_INLINE_FRAME_BIDI_VISUAL_IS_LEFT_MOST 0x00400000
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#define NS_INLINE_FRAME_BIDI_VISUAL_IS_RIGHT_MOST 0x00800000
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/**
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* Inline frame class.
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*
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* This class manages a list of child frames that are inline frames. Working with
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* nsLineLayout, the class will reflow and place inline frames on a line.
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*/
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class nsInlineFrame : public nsInlineFrameSuper
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{
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public:
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friend nsIFrame* NS_NewInlineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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// nsISupports overrides
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NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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// nsIFrame overrides
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NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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#ifdef ACCESSIBILITY
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NS_IMETHODIMP GetAccessible(nsIAccessible** aAccessible);
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#endif
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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#endif
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virtual nsIAtom* GetType() const;
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virtual PRBool IsFrameOfType(PRUint32 aFlags) const
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{
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return nsInlineFrameSuper::IsFrameOfType(aFlags &
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~(nsIFrame::eBidiInlineContainer | nsIFrame::eLineParticipant));
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}
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virtual PRBool IsEmpty();
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virtual PRBool IsSelfEmpty();
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virtual PRBool PeekOffsetCharacter(PRBool aForward, PRInt32* aOffset);
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// nsIHTMLReflow overrides
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virtual void AddInlineMinWidth(nsIRenderingContext *aRenderingContext,
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InlineMinWidthData *aData);
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virtual void AddInlinePrefWidth(nsIRenderingContext *aRenderingContext,
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InlinePrefWidthData *aData);
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virtual nsSize ComputeSize(nsIRenderingContext *aRenderingContext,
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nsSize aCBSize, nscoord aAvailableWidth,
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nsSize aMargin, nsSize aBorder, nsSize aPadding,
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PRBool aShrinkWrap);
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virtual nsRect ComputeTightBounds(gfxContext* aContext) const;
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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virtual PRBool CanContinueTextRun() const;
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// Take all of the frames away from this frame. The caller is
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// presumed to keep them alive.
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void StealAllFrames() {
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mFrames.SetFrames(nsnull);
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}
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/**
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* Return true if the frame is leftmost frame or continuation.
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*/
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PRBool IsLeftMost() const {
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// If the frame's bidi visual state is set, return is-leftmost state
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// else return true if it's the first continuation.
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return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
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? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_LEFT_MOST)
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: (!GetPrevInFlow());
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}
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/**
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* Return true if the frame is rightmost frame or continuation.
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*/
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PRBool IsRightMost() const {
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// If the frame's bidi visual state is set, return is-rightmost state
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// else return true if it's the last continuation.
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return (GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET)
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? !!(GetStateBits() & NS_INLINE_FRAME_BIDI_VISUAL_IS_RIGHT_MOST)
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: (!GetNextInFlow());
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}
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protected:
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// Additional reflow state used during our reflow methods
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struct InlineReflowState {
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nsIFrame* mPrevFrame;
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nsInlineFrame* mNextInFlow;
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nsIFrame* mLineContainer;
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PRPackedBool mSetParentPointer; // when reflowing child frame first set its
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// parent frame pointer
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InlineReflowState() {
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mPrevFrame = nsnull;
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mNextInFlow = nsnull;
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mLineContainer = nsnull;
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mSetParentPointer = PR_FALSE;
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}
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};
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nsInlineFrame(nsStyleContext* aContext) : nsInlineFrameSuper(aContext) {}
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virtual PRIntn GetSkipSides() const;
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nsresult ReflowFrames(nsPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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InlineReflowState& rs,
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nsHTMLReflowMetrics& aMetrics,
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nsReflowStatus& aStatus);
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nsresult ReflowInlineFrame(nsPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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InlineReflowState& rs,
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nsIFrame* aFrame,
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nsReflowStatus& aStatus);
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/**
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* Reparent floats whose placeholders are inline descendants of aFrame from
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* whatever block they're currently parented by to aOurBlock.
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* @param aReparentSiblings if this is true, we follow aFrame's
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* GetNextSibling chain reparenting them all
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*/
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void ReparentFloatsForInlineChild(nsIFrame* aOurBlock, nsIFrame* aFrame,
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PRBool aReparentSiblings);
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virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
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InlineReflowState& rs,
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PRBool* aIsComplete);
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virtual void PushFrames(nsPresContext* aPresContext,
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nsIFrame* aFromChild,
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nsIFrame* aPrevSibling);
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};
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//----------------------------------------------------------------------
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/**
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* Variation on inline-frame used to manage lines for line layout in
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* special situations (:first-line style in particular).
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*/
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class nsFirstLineFrame : public nsInlineFrame {
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public:
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friend nsIFrame* NS_NewFirstLineFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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#endif
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virtual nsIAtom* GetType() const;
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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// Take frames starting at aFrame until the end of the frame-list
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// away from this frame. The caller is presumed to keep them alive.
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void StealFramesFrom(nsIFrame* aFrame);
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protected:
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nsFirstLineFrame(nsStyleContext* aContext) : nsInlineFrame(aContext) {}
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virtual nsIFrame* PullOneFrame(nsPresContext* aPresContext,
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InlineReflowState& rs,
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PRBool* aIsComplete);
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};
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//----------------------------------------------------------------------
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// Derived class created for relatively positioned inline-level elements
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// that acts as a containing block for child absolutely positioned
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// elements
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class nsPositionedInlineFrame : public nsInlineFrame
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{
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public:
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nsPositionedInlineFrame(nsStyleContext* aContext)
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: nsInlineFrame(aContext)
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, mAbsoluteContainer(nsGkAtoms::absoluteList)
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{}
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virtual ~nsPositionedInlineFrame() { } // useful for debugging
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virtual void Destroy();
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NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
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nsIFrame* aChildList);
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NS_IMETHOD AppendFrames(nsIAtom* aListName,
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nsIFrame* aFrameList);
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NS_IMETHOD InsertFrames(nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList);
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NS_IMETHOD RemoveFrame(nsIAtom* aListName,
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nsIFrame* aOldFrame);
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NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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virtual nsIAtom* GetAdditionalChildListName(PRInt32 aIndex) const;
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virtual nsIFrame* GetFirstChild(nsIAtom* aListName) const;
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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virtual nsIAtom* GetType() const;
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protected:
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nsAbsoluteContainingBlock mAbsoluteContainer;
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};
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#endif /* nsInlineFrame_h___ */
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