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/*
Copyright (C) 2000-2005 SKYRIX Software AG
This file is part of SOPE.
SOPE is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
SOPE is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with SOPE; see the file COPYING. If not, write to the
Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/
#include "DOMNodeWalker.h"
#include "DOMNode.h"
#include "common.h"
@interface NGDOMNodeWalker(Privates)
- (void)_processCurrentNode;
@end
@implementation NGDOMNodeWalker
- (id)initWithTarget:(id)_target selector:(SEL)_selector context:(id)_ctx {
self->target = [_target retain];
self->selector = _selector;
self->ctx = [_ctx retain];
if (self->target == nil) {
[self release];
return nil;
}
if (self->selector == NULL) {
[self release];
return nil;
}
return self;
}
- (void)dealloc {
[self->ctx release];
[self->rootNode release];
[self->target release];
[super dealloc];
}
/* accessors */
- (id)context {
return self->ctx;
}
- (id)rootNode {
return self->rootNode;
}
- (id)currentParentNode {
return self->currentParentNode;
}
- (id)currentNode {
return self->currentNode;
}
/* private */
- (void)_processCurrentNode {
[self->target performSelector:self->selector withObject:self];
}
- (void)_beforeChildren {
}
- (void)_afterChildren {
}
- (void)_walkNodeUsingChildNodes:(id)_node {
if (self->isStopped) return;
self->currentNode = _node;
[self _beforeChildren];
if (self->isStopped) return;
if ([_node hasChildNodes]) {
id children;
unsigned i, count;
id oldParent;
oldParent = self->currentParentNode;
self->currentParentNode = self->currentNode;
children = [_node childNodes];
for (i = 0, count = [children count]; i < count; i++) {
[self _walkNodeUsingChildNodes:[children objectAtIndex:i]];
if (self->isStopped) return;
}
self->currentParentNode = oldParent;
}
[self _afterChildren];
if (self->isStopped) return;
}
/* public */
- (void)walkNode:(id)_node {
self->rootNode = [_node retain];
self->isStopped = NO;
self->currentParentNode = nil;
[self _walkNodeUsingChildNodes:_node];
[self->rootNode release]; self->rootNode = nil;
}
- (void)stopWalking {
self->isStopped = YES;
}
@end /* NGDOMNodeWalker */
@implementation NGDOMNodePreorderWalker
- (void)_beforeChildren {
[self _processCurrentNode];
}
- (void)_afterChildren {
}
@end /* NGDOMNodePreorderWalker */
@implementation NGDOMNodePostorderWalker
- (void)_beforeChildren {
}
- (void)_afterChildren {
[self _processCurrentNode];
}
@end /* NGDOMNodePreorderWalker */
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