mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-31 14:15:30 +00:00
260 lines
9.3 KiB
C++
260 lines
9.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
// vim:cindent:ai:sw=4:ts=4:et:
|
|
/* ***** 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 nsCounterManager.
|
|
*
|
|
* The Initial Developer of the Original Code is the Mozilla Foundation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2004
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* L. David Baron <dbaron@dbaron.org> (original author)
|
|
*
|
|
* 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 ***** */
|
|
#ifndef nsCounterManager_h_
|
|
#define nsCounterManager_h_
|
|
|
|
#include "nsGenConList.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "nsClassHashtable.h"
|
|
|
|
class nsCounterList;
|
|
struct nsCounterUseNode;
|
|
struct nsCounterChangeNode;
|
|
|
|
struct nsCounterNode : public nsGenConNode {
|
|
enum Type {
|
|
RESET, // a "counter number" pair in 'counter-reset'
|
|
INCREMENT, // a "counter number" pair in 'counter-increment'
|
|
USE // counter() or counters() in 'content'
|
|
};
|
|
|
|
Type mType;
|
|
|
|
// Counter value after this node
|
|
PRInt32 mValueAfter;
|
|
|
|
// mScopeStart points to the node (usually a RESET, but not in the
|
|
// case of an implied 'counter-reset') that created the scope for
|
|
// this element (for a RESET, its outer scope, i.e., the one it is
|
|
// inside rather than the one it creates).
|
|
|
|
// May be null for all types, but only when mScopePrev is also null.
|
|
// Being null for a non-RESET means that it is an implied
|
|
// 'counter-reset'. Being null for a RESET means it has no outer
|
|
// scope.
|
|
nsCounterNode *mScopeStart;
|
|
|
|
// mScopePrev points to the previous node that is in the same scope,
|
|
// or for a RESET, the previous node in the scope outside of the
|
|
// reset.
|
|
|
|
// May be null for all types, but only when mScopeStart is also
|
|
// null. Following the mScopePrev links will eventually lead to
|
|
// mScopeStart. Being null for a non-RESET means that it is an
|
|
// implied 'counter-reset'. Being null for a RESET means it has no
|
|
// outer scope.
|
|
nsCounterNode *mScopePrev;
|
|
|
|
inline nsCounterUseNode* UseNode();
|
|
inline nsCounterChangeNode* ChangeNode();
|
|
|
|
// For RESET and INCREMENT nodes, aPseudoFrame need not be a
|
|
// pseudo-element, and aContentIndex represents the index within the
|
|
// 'counter-reset' or 'counter-increment' property instead of within
|
|
// the 'content' property but offset to ensure that (reset,
|
|
// increment, use) sort in that order. (This slight weirdness
|
|
// allows sharing a lot of code with 'quotes'.)
|
|
nsCounterNode(nsIFrame* aPseudoFrame, PRInt32 aContentIndex, Type aType)
|
|
: nsGenConNode(aPseudoFrame, aContentIndex)
|
|
, mType(aType)
|
|
, mValueAfter(0)
|
|
, mScopeStart(nsnull)
|
|
, mScopePrev(nsnull)
|
|
{
|
|
}
|
|
|
|
// to avoid virtual function calls in the common case
|
|
inline void Calc(nsCounterList* aList);
|
|
};
|
|
|
|
struct nsCounterUseNode : public nsCounterNode {
|
|
// The same structure passed through the style system: an array
|
|
// containing the values in the counter() or counters() in the order
|
|
// given in the CSS spec.
|
|
nsRefPtr<nsCSSValue::Array> mCounterStyle;
|
|
|
|
// false for counter(), true for counters()
|
|
PRBool mAllCounters;
|
|
|
|
// args go directly to member variables here and of nsGenConNode
|
|
nsCounterUseNode(nsCSSValue::Array* aCounterStyle, nsIFrame* aPseudoFrame,
|
|
PRUint32 aContentIndex, PRBool aAllCounters)
|
|
: nsCounterNode(aPseudoFrame, aContentIndex, USE)
|
|
, mCounterStyle(aCounterStyle)
|
|
, mAllCounters(aAllCounters)
|
|
{
|
|
NS_ASSERTION(aContentIndex >= 0, "out of range");
|
|
}
|
|
|
|
// assign the correct |mValueAfter| value to a node that has been inserted
|
|
// Should be called immediately after calling |Insert|.
|
|
void Calc(nsCounterList* aList);
|
|
|
|
// The text that should be displayed for this counter.
|
|
void GetText(nsString& aResult);
|
|
};
|
|
|
|
struct nsCounterChangeNode : public nsCounterNode {
|
|
PRInt32 mChangeValue; // the numeric value of the increment or reset
|
|
|
|
// |aPseudoFrame| is not necessarily a pseudo-element's frame, but
|
|
// since it is for every other subclass of nsGenConNode, we follow
|
|
// the naming convention here.
|
|
// |aPropIndex| is the index of the value within the list in the
|
|
// 'counter-increment' or 'counter-reset' property.
|
|
nsCounterChangeNode(nsIFrame* aPseudoFrame,
|
|
nsCounterNode::Type aChangeType,
|
|
PRInt32 aChangeValue,
|
|
PRInt32 aPropIndex)
|
|
: nsCounterNode(aPseudoFrame,
|
|
// Fake a content index for resets and increments
|
|
// that comes before all the real content, with
|
|
// the resets first, in order, and then the increments.
|
|
aPropIndex + (aChangeType == RESET
|
|
? (PR_INT32_MIN)
|
|
: (PR_INT32_MIN / 2)),
|
|
aChangeType)
|
|
, mChangeValue(aChangeValue)
|
|
{
|
|
NS_ASSERTION(aPropIndex >= 0, "out of range");
|
|
NS_ASSERTION(aChangeType == INCREMENT || aChangeType == RESET,
|
|
"bad type");
|
|
}
|
|
|
|
// assign the correct |mValueAfter| value to a node that has been inserted
|
|
// Should be called immediately after calling |Insert|.
|
|
void Calc(nsCounterList* aList);
|
|
};
|
|
|
|
inline nsCounterUseNode* nsCounterNode::UseNode()
|
|
{
|
|
NS_ASSERTION(mType == USE, "wrong type");
|
|
return NS_STATIC_CAST(nsCounterUseNode*, this);
|
|
}
|
|
|
|
inline nsCounterChangeNode* nsCounterNode::ChangeNode()
|
|
{
|
|
NS_ASSERTION(mType == INCREMENT || mType == RESET, "wrong type");
|
|
return NS_STATIC_CAST(nsCounterChangeNode*, this);
|
|
}
|
|
|
|
inline void nsCounterNode::Calc(nsCounterList* aList)
|
|
{
|
|
if (mType == USE)
|
|
UseNode()->Calc(aList);
|
|
else
|
|
ChangeNode()->Calc(aList);
|
|
}
|
|
|
|
class nsCounterList : public nsGenConList {
|
|
public:
|
|
nsCounterList() : nsGenConList() {}
|
|
|
|
void Insert(nsCounterNode* aNode) {
|
|
nsGenConList::Insert(aNode);
|
|
SetScope(aNode);
|
|
}
|
|
|
|
nsCounterNode* First() {
|
|
return NS_STATIC_CAST(nsCounterNode*, mFirstNode);
|
|
}
|
|
|
|
static nsCounterNode* Next(nsCounterNode* aNode) {
|
|
return NS_STATIC_CAST(nsCounterNode*, nsGenConList::Next(aNode));
|
|
}
|
|
static nsCounterNode* Prev(nsCounterNode* aNode) {
|
|
return NS_STATIC_CAST(nsCounterNode*, nsGenConList::Prev(aNode));
|
|
}
|
|
|
|
static PRInt32 ValueBefore(nsCounterNode* aNode) {
|
|
return aNode->mScopePrev ? aNode->mScopePrev->mValueAfter : 0;
|
|
}
|
|
|
|
// Correctly set |aNode->mScopeStart| and |aNode->mScopePrev|
|
|
void SetScope(nsCounterNode *aNode);
|
|
|
|
// Recalculate |mScopeStart|, |mScopePrev|, and |mValueAfter| for
|
|
// all nodes and update text in text content nodes.
|
|
void RecalcAll();
|
|
|
|
PRBool IsDirty() { return mDirty; }
|
|
void SetDirty() { mDirty = PR_TRUE; }
|
|
|
|
private:
|
|
PRBool mDirty;
|
|
};
|
|
|
|
/**
|
|
* The counter manager maintains an |nsCounterList| for each named
|
|
* counter to keep track of all scopes with that name.
|
|
*/
|
|
class nsCounterManager {
|
|
public:
|
|
nsCounterManager();
|
|
// Returns true if dirty
|
|
PRBool AddCounterResetsAndIncrements(nsIFrame *aFrame);
|
|
|
|
// Gets the appropriate counter list, creating it if necessary.
|
|
// Returns null only on out-of-memory.
|
|
nsCounterList* CounterListFor(const nsSubstring& aCounterName);
|
|
|
|
// Clean up data in any dirty counter lists.
|
|
void RecalcAll();
|
|
|
|
// Destroy nodes for the frame in any lists, and return whether any
|
|
// nodes were destroyed.
|
|
PRBool DestroyNodesFor(nsIFrame *aFrame);
|
|
|
|
// Clear all data.
|
|
void Clear() { mNames.Clear(); }
|
|
|
|
#ifdef DEBUG
|
|
void Dump();
|
|
#endif
|
|
|
|
private:
|
|
// for |AddCounterResetsAndIncrements| only
|
|
PRBool AddResetOrIncrement(nsIFrame *aFrame, PRInt32 aIndex,
|
|
const nsStyleCounterData *aCounterData,
|
|
nsCounterNode::Type aType);
|
|
|
|
nsClassHashtable<nsStringHashKey, nsCounterList> mNames;
|
|
};
|
|
|
|
#endif /* nsCounterManager_h_ */
|