gecko-dev/layout/base/nsQuoteList.h
Karl Tomlinson 9968c6380f b=513807 comparison of unsigned expression >= 0 is always true when constructing nsGenConNodes r=dbaron
--HG--
extra : rebase_source : b4d995793272279136753949181b6c2793b111bf
2009-09-03 08:45:43 +12:00

124 lines
4.2 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.org code.
*
* The Initial Developer of the Original Code is
* Esben Mose Hansen.
*
* Contributor(s):
* Esben Mose Hansen <esben@oek.dk> (original author)
* L. David Baron <dbaron@dbaron.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 ***** */
/* implementation of quotes for the CSS 'content' property */
#ifndef nsQuoteList_h___
#define nsQuoteList_h___
#include "nsGenConList.h"
struct nsQuoteNode : public nsGenConNode {
// open-quote, close-quote, no-open-quote, or no-close-quote
const nsStyleContentType mType;
// Quote depth before this quote, which is always non-negative.
PRInt32 mDepthBefore;
nsQuoteNode(nsStyleContentType& aType, PRUint32 aContentIndex)
: nsGenConNode(aContentIndex)
, mType(aType)
, mDepthBefore(0)
{
NS_ASSERTION(aType == eStyleContentType_OpenQuote ||
aType == eStyleContentType_CloseQuote ||
aType == eStyleContentType_NoOpenQuote ||
aType == eStyleContentType_NoCloseQuote,
"incorrect type");
NS_ASSERTION(aContentIndex <= PR_INT32_MAX, "out of range");
}
virtual PRBool InitTextFrame(nsGenConList* aList,
nsIFrame* aPseudoFrame, nsIFrame* aTextFrame);
// is this 'open-quote' or 'no-open-quote'?
PRBool IsOpenQuote() {
return mType == eStyleContentType_OpenQuote ||
mType == eStyleContentType_NoOpenQuote;
}
// is this 'close-quote' or 'no-close-quote'?
PRBool IsCloseQuote() {
return !IsOpenQuote();
}
// is this 'open-quote' or 'close-quote'?
PRBool IsRealQuote() {
return mType == eStyleContentType_OpenQuote ||
mType == eStyleContentType_CloseQuote;
}
// Depth of the quote for *this* node. Either non-negative or -1.
// -1 means this is a closing quote that tried to decrement the
// counter below zero (which means no quote should be rendered).
PRInt32 Depth() {
return IsOpenQuote() ? mDepthBefore : mDepthBefore - 1;
}
// always non-negative
PRInt32 DepthAfter() {
return IsOpenQuote() ? mDepthBefore + 1
: (mDepthBefore == 0 ? 0 : mDepthBefore - 1);
}
// The text that should be displayed for this quote.
const nsString* Text();
};
class nsQuoteList : public nsGenConList {
private:
nsQuoteNode* FirstNode() { return static_cast<nsQuoteNode*>(mFirstNode); }
public:
// assign the correct |mDepthBefore| value to a node that has been inserted
// Should be called immediately after calling |Insert|.
void Calc(nsQuoteNode* aNode);
nsQuoteNode* Next(nsQuoteNode* aNode) {
return static_cast<nsQuoteNode*>(nsGenConList::Next(aNode));
}
nsQuoteNode* Prev(nsQuoteNode* aNode) {
return static_cast<nsQuoteNode*>(nsGenConList::Prev(aNode));
}
void RecalcAll();
#ifdef DEBUG
void PrintChain();
#endif
};
#endif /* nsQuoteList_h___ */