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/*
* Copyright (c) 2004, Nate Nielsen
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*
* CONTRIBUTORS
* Nate Nielsen <nielsen@memberwebs.com>
*
*/
#ifndef __DOMHELPERS_H__
#define __DOMHELPERS_H__
#include "sablo.h"
#include <map>
#include <stack>
#include <set>
/*
* DOMHelpers
*
* A collection of functions for doing some things with an XML DOM.
* Used mainly by XMLComposer.
*/
class DOMHelpers
{
public:
// Check if given node is an element with a certain name
static bool isElement(const DOM::Node& node, const string& name);
// Check if two elements have the same name and attributes
static bool isEqualElement(const DOM::Element& el1, const DOM::Element& el2);
// Copy attributes from one element to another optionaly ignoring some
static void copyAttributes(const DOM::Element& src, DOM::Element& dest, const char** hideList);
// Insert a child node after a given reference node
static void insertAfter(DOM::Node& parent, const DOM::Node& node, const DOM::Node& ref);
// Get containing element of a given name
static DOM::Element getContainingElement(const DOM::Node& node, const string& name);
// Get previous element (in XML flow) of a given name
static DOM::Element getPriorElement(const DOM::Node& node, const string& name);
// Get first child element of a given name
static DOM::Element getChildElement(const DOM::Node& parent, const string& name);
// Check if a given element is anothers ancestor
static bool hasAncestor(const DOM::Node& ancestor, const DOM::Node& node);
};
/*
* ElementTable
*
* A table of elements matched to their ids for quick access while applying
* things like fonts, styles, lists from their definitions.
*/
class ElementTable :
public std::map<wstring, DOM::Element>
{
public:
void load(const DOM::Node& parent, const string& name);
DOM::Element get(const wstring& id) const;
bool has(const wstring& id) const
{ return find(id) != end(); }
void removeIds();
};
// Some other handy types
typedef std::set<string> StringSet;
typedef std::stack<DOM::Node> NodeStack;
/*
* ElementIterator
*
* For iterating through the elements in a document.
*/
class ElementIterator
: public std::iterator<std::input_iterator_tag, DOM::Element, ptrdiff_t>
{
public:
ElementIterator()
{ m_flags = AFTER_LAST; }
ElementIterator(const DOM::Element& top)
{ m_top = top; m_flags = BEFORE_FIRST; next(); }
ElementIterator(const ElementIterator& x)
{ m_top = x.m_top; m_current = x.m_current; m_flags = x.m_flags; }
const DOM::Element& operator*() const
{ return m_current; }
const DOM::Element* operator->() const
{ return (&**this); }
const ElementIterator& operator++()
{ next(); return (*this); }
const ElementIterator& operator--()
{ prev(); return (*this); }
// Friend comparision functions
friend bool operator==(const ElementIterator& x, const ElementIterator& y);
friend bool operator!=(const ElementIterator& x, const ElementIterator& y);
// Implementation
protected:
void next();
DOM::Element nextel(DOM::Node node);
void prev();
DOM::Element prevel(DOM::Node node);
// Data
protected:
enum
{
ITERATING,
BEFORE_FIRST,
AFTER_LAST
};
DOM::Element m_top;
DOM::Element m_current;
int m_flags;
};
// friend functions
inline bool operator==(const ElementIterator& x, const ElementIterator& y)
{ return y.m_current == x.m_current && y.m_flags == x.m_flags; }
inline bool operator!=(const ElementIterator& x, const ElementIterator& y)
{ return (!(x == y)); }
#endif // __DOMHELPERS_H__
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