1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/base/nsGenConList.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,109 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/* base class for nsCounterList and nsQuoteList */
1.10 +
1.11 +#ifndef nsGenConList_h___
1.12 +#define nsGenConList_h___
1.13 +
1.14 +#include "nsIFrame.h"
1.15 +#include "nsStyleStruct.h"
1.16 +#include "prclist.h"
1.17 +#include "nsIDOMCharacterData.h"
1.18 +#include "nsCSSPseudoElements.h"
1.19 +
1.20 +class nsGenConList;
1.21 +
1.22 +struct nsGenConNode : public PRCList {
1.23 + // The wrapper frame for all of the pseudo-element's content. This
1.24 + // frame generally has useful style data and has the
1.25 + // NS_FRAME_GENERATED_CONTENT bit set (so we use it to track removal),
1.26 + // but does not necessarily for |nsCounterChangeNode|s.
1.27 + nsIFrame* mPseudoFrame;
1.28 +
1.29 + // Index within the list of things specified by the 'content' property,
1.30 + // which is needed to do 'content: open-quote open-quote' correctly,
1.31 + // and needed for similar cases for counters.
1.32 + const int32_t mContentIndex;
1.33 +
1.34 + // null for 'content:no-open-quote', 'content:no-close-quote' and for
1.35 + // counter nodes for increments and resets (rather than uses)
1.36 + nsCOMPtr<nsIDOMCharacterData> mText;
1.37 +
1.38 + nsGenConNode(int32_t aContentIndex)
1.39 + : mPseudoFrame(nullptr)
1.40 + , mContentIndex(aContentIndex)
1.41 + {
1.42 + }
1.43 +
1.44 + /**
1.45 + * Finish initializing the generated content node once we know the
1.46 + * relevant text frame. This must be called just after
1.47 + * the textframe has been initialized. This need not be called at all
1.48 + * for nodes that don't generate text. This will generally set the
1.49 + * mPseudoFrame, insert the node into aList, and set aTextFrame up
1.50 + * with the correct text.
1.51 + * @param aList the list the node belongs to
1.52 + * @param aPseudoFrame the :before or :after frame
1.53 + * @param aTextFrame the textframe where the node contents will render
1.54 + * @return true iff this marked the list dirty
1.55 + */
1.56 + virtual bool InitTextFrame(nsGenConList* aList, nsIFrame* aPseudoFrame,
1.57 + nsIFrame* aTextFrame)
1.58 + {
1.59 + mPseudoFrame = aPseudoFrame;
1.60 + CheckFrameAssertions();
1.61 + return false;
1.62 + }
1.63 +
1.64 + virtual ~nsGenConNode() {} // XXX Avoid, perhaps?
1.65 +
1.66 +protected:
1.67 + void CheckFrameAssertions() {
1.68 + NS_ASSERTION(mContentIndex <
1.69 + int32_t(mPseudoFrame->StyleContent()->ContentCount()),
1.70 + "index out of range");
1.71 + // We allow negative values of mContentIndex for 'counter-reset' and
1.72 + // 'counter-increment'.
1.73 +
1.74 + NS_ASSERTION(mContentIndex < 0 ||
1.75 + mPseudoFrame->StyleContext()->GetPseudo() ==
1.76 + nsCSSPseudoElements::before ||
1.77 + mPseudoFrame->StyleContext()->GetPseudo() ==
1.78 + nsCSSPseudoElements::after,
1.79 + "not :before/:after generated content and not counter change");
1.80 + NS_ASSERTION(mContentIndex < 0 ||
1.81 + mPseudoFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT,
1.82 + "not generated content and not counter change");
1.83 + }
1.84 +};
1.85 +
1.86 +class nsGenConList {
1.87 +protected:
1.88 + nsGenConNode* mFirstNode;
1.89 + uint32_t mSize;
1.90 +public:
1.91 + nsGenConList() : mFirstNode(nullptr), mSize(0) {}
1.92 + ~nsGenConList() { Clear(); }
1.93 + void Clear();
1.94 + static nsGenConNode* Next(nsGenConNode* aNode) {
1.95 + return static_cast<nsGenConNode*>(PR_NEXT_LINK(aNode));
1.96 + }
1.97 + static nsGenConNode* Prev(nsGenConNode* aNode) {
1.98 + return static_cast<nsGenConNode*>(PR_PREV_LINK(aNode));
1.99 + }
1.100 + void Insert(nsGenConNode* aNode);
1.101 + // returns whether any nodes have been destroyed
1.102 + bool DestroyNodesFor(nsIFrame* aFrame); //destroy all nodes with aFrame as parent
1.103 +
1.104 + // Return true if |aNode1| is after |aNode2|.
1.105 + static bool NodeAfter(const nsGenConNode* aNode1,
1.106 + const nsGenConNode* aNode2);
1.107 +
1.108 + void Remove(nsGenConNode* aNode) { PR_REMOVE_LINK(aNode); mSize--; }
1.109 + bool IsLast(nsGenConNode* aNode) { return (Next(aNode) == mFirstNode); }
1.110 +};
1.111 +
1.112 +#endif /* nsGenConList_h___ */
