michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* base class for nsCounterList and nsQuoteList */
michael@0: 
michael@0: #ifndef nsGenConList_h___
michael@0: #define nsGenConList_h___
michael@0: 
michael@0: #include "nsIFrame.h"
michael@0: #include "nsStyleStruct.h"
michael@0: #include "prclist.h"
michael@0: #include "nsIDOMCharacterData.h"
michael@0: #include "nsCSSPseudoElements.h"
michael@0: 
michael@0: class nsGenConList;
michael@0: 
michael@0: struct nsGenConNode : public PRCList {
michael@0:   // The wrapper frame for all of the pseudo-element's content.  This
michael@0:   // frame generally has useful style data and has the
michael@0:   // NS_FRAME_GENERATED_CONTENT bit set (so we use it to track removal),
michael@0:   // but does not necessarily for |nsCounterChangeNode|s.
michael@0:   nsIFrame* mPseudoFrame;
michael@0: 
michael@0:   // Index within the list of things specified by the 'content' property,
michael@0:   // which is needed to do 'content: open-quote open-quote' correctly,
michael@0:   // and needed for similar cases for counters.
michael@0:   const int32_t mContentIndex;
michael@0: 
michael@0:   // null for 'content:no-open-quote', 'content:no-close-quote' and for
michael@0:   // counter nodes for increments and resets (rather than uses)
michael@0:   nsCOMPtr<nsIDOMCharacterData> mText;
michael@0: 
michael@0:   nsGenConNode(int32_t aContentIndex)
michael@0:     : mPseudoFrame(nullptr)
michael@0:     , mContentIndex(aContentIndex)
michael@0:   {
michael@0:   }
michael@0: 
michael@0:   /**
michael@0:    * Finish initializing the generated content node once we know the
michael@0:    * relevant text frame. This must be called just after
michael@0:    * the textframe has been initialized. This need not be called at all
michael@0:    * for nodes that don't generate text. This will generally set the
michael@0:    * mPseudoFrame, insert the node into aList, and set aTextFrame up
michael@0:    * with the correct text.
michael@0:    * @param aList the list the node belongs to
michael@0:    * @param aPseudoFrame the :before or :after frame
michael@0:    * @param aTextFrame the textframe where the node contents will render
michael@0:    * @return true iff this marked the list dirty
michael@0:    */
michael@0:   virtual bool InitTextFrame(nsGenConList* aList, nsIFrame* aPseudoFrame,
michael@0:                                nsIFrame* aTextFrame)
michael@0:   {
michael@0:     mPseudoFrame = aPseudoFrame;
michael@0:     CheckFrameAssertions();
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   virtual ~nsGenConNode() {} // XXX Avoid, perhaps?
michael@0: 
michael@0: protected:
michael@0:   void CheckFrameAssertions() {
michael@0:     NS_ASSERTION(mContentIndex <
michael@0:                    int32_t(mPseudoFrame->StyleContent()->ContentCount()),
michael@0:                  "index out of range");
michael@0:       // We allow negative values of mContentIndex for 'counter-reset' and
michael@0:       // 'counter-increment'.
michael@0: 
michael@0:     NS_ASSERTION(mContentIndex < 0 ||
michael@0:                  mPseudoFrame->StyleContext()->GetPseudo() ==
michael@0:                    nsCSSPseudoElements::before ||
michael@0:                  mPseudoFrame->StyleContext()->GetPseudo() ==
michael@0:                    nsCSSPseudoElements::after,
michael@0:                  "not :before/:after generated content and not counter change");
michael@0:     NS_ASSERTION(mContentIndex < 0 ||
michael@0:                  mPseudoFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT,
michael@0:                  "not generated content and not counter change");
michael@0:   }
michael@0: };
michael@0: 
michael@0: class nsGenConList {
michael@0: protected:
michael@0:   nsGenConNode* mFirstNode;
michael@0:   uint32_t mSize;
michael@0: public:
michael@0:   nsGenConList() : mFirstNode(nullptr), mSize(0) {}
michael@0:   ~nsGenConList() { Clear(); }
michael@0:   void Clear();
michael@0:   static nsGenConNode* Next(nsGenConNode* aNode) {
michael@0:     return static_cast<nsGenConNode*>(PR_NEXT_LINK(aNode));
michael@0:   }
michael@0:   static nsGenConNode* Prev(nsGenConNode* aNode) {
michael@0:     return static_cast<nsGenConNode*>(PR_PREV_LINK(aNode));
michael@0:   }
michael@0:   void Insert(nsGenConNode* aNode);
michael@0:   // returns whether any nodes have been destroyed
michael@0:   bool DestroyNodesFor(nsIFrame* aFrame); //destroy all nodes with aFrame as parent
michael@0: 
michael@0:   // Return true if |aNode1| is after |aNode2|.
michael@0:   static bool NodeAfter(const nsGenConNode* aNode1,
michael@0:                           const nsGenConNode* aNode2);
michael@0: 
michael@0:   void Remove(nsGenConNode* aNode) { PR_REMOVE_LINK(aNode); mSize--; }
michael@0:   bool IsLast(nsGenConNode* aNode) { return (Next(aNode) == mFirstNode); }
michael@0: };
michael@0: 
michael@0: #endif /* nsGenConList_h___ */