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- /* This file is part of the KDE project
- Copyright (c) 2003 Lukas Tinkl <lukas@kde.org>
- Copyright (c) 2003 David Faure <faure@kde.org>
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public License
- along with this library; see the file COPYING.LIB. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
- #ifndef KOSTYLESTACK_H
- #define KOSTYLESTACK_H
-
-
- #include <qvaluelist.h>
- #include <qdom.h>
- #include <qvaluestack.h>
-
- #include <kdemacros.h>
-
- #include "koffice_export.h"
-
- /**
- * @brief This class implements a stack for the different styles of an object.
- *
- * There can be several styles that are valid for one object. For example
- * a textobject on a page has styles 'pr3' and 'P7' and a paragraph in
- * that textobject has styles 'P1' and 'T3'. And some styles even have
- * parent-styles...
- *
- * If you want to know if there is, for example, the attribute 'fo:font-family'
- * for this paragraph, you have to look into style 'T3', 'P1', 'P7' and 'pr3'.
- * When you find this attribute in one style you have to stop processing the list
- * and take the found attribute for this object.
- *
- * This is what this class does. You can push styles on the stack while walking
- * through the xml-tree to your object and then ask the stack if any of the styles
- * provides a certain attribute. The stack will search from top to bottom, i.e.
- * in our example from 'T3' to 'pr3' and return the first occurrence of the wanted
- * attribute.
- *
- * So this is some sort of inheritance where the styles on top of the stack overwrite
- * the same attribute of a lower style on the stack.
- *
- * In general though, you wouldn't use push/pop directly, but KoOasisLoadingContext::fillStyleStack
- * or KoOasisLoadingContext::addStyles to automatically push a style and all its
- * parent styles onto the stack.
- */
- class KOFFICECORE_EXPORT KoStyleStack
- {
- public:
- /**
- * Create a OASIS style stack
- */
- KoStyleStack();
- /**
- * Create a style stack based on other namespaces than OASIS - used for OOo-1.1 import.
- */
- KoStyleStack( const char* styleNSURI, const char* foNSURI );
- virtual ~KoStyleStack();
-
- /**
- * Clears the complete stack.
- */
- void clear();
-
- /**
- * Save the current state of the stack. Any items added between
- * this call and its corresponding restore() will be removed when calling restore().
- */
- void save();
-
- /**
- * Restore the stack to the state it was at the corresponding save() call.
- */
- void restore();
-
- /**
- * Removes the style on top of the stack.
- */
- void pop();
-
- /**
- * Pushes the new style onto the stack.
- */
- void push( const QDomElement& style );
-
- /**
- * Check if any of the styles on the stack has an attribute called 'name'-'detail'
- * where detail is e.g. left, right, top or bottom.
- * This allows to also find 'name' alone (e.g. padding implies padding-left, padding-right etc.)
- */
- bool hasAttribute( const QString& name, const QString& detail = QString::null ) const KDE_DEPRECATED;
-
- /**
- * Search for the attribute called 'name', starting on top of the stack,
- * and return it.
- */
- QString attribute( const QString& name, const QString& detail = QString::null ) const KDE_DEPRECATED;
-
- /**
- * Check if any of the styles on the stack has an attribute called 'name'-'detail'
- * where detail is e.g. left, right, top or bottom.
- * This allows to also find 'name' alone (e.g. padding implies padding-left, padding-right etc.)
- */
- bool hasAttributeNS( const char* nsURI, const char* localName, const char* detail = 0 ) const;
-
- /**
- * Search for the attribute called 'name', starting on top of the stack,
- * and return it.
- */
- QString attributeNS( const char* nsURI, const char* localName, const char* detail = 0 ) const;
-
- /**
- * Check if any of the styles on the stack has a child node called 'name'.
- */
- bool hasChildNode( const QString & name ) const KDE_DEPRECATED;
-
- /**
- * Search for a child node called 'name', starting on top of the stack,
- * and return it.
- */
- QDomElement childNode( const QString & name ) const KDE_DEPRECATED;
-
- /**
- * Check if any of the styles on the stack has a child element called 'localName' in the namespace 'nsURI'.
- */
- bool hasChildNodeNS( const char* nsURI, const char* localName ) const;
-
- /**
- * Search for a child element which has a child element called 'localName'
- * in the namespace 'nsURI' starting on top of the stack,
- * and return it.
- */
- QDomElement childNodeNS( const char* nsURI, const char* localName ) const;
-
- /**
- * Special case for the current font size, due to special handling of fo:font-size="115%".
- */
- double fontSize() const;
-
- /**
- * Return the name of the style specified by the user,
- * i.e. not an auto style.
- * This is used to know e.g. which user-style is associated with the current paragraph.
- * There could be none though.
- */
- QString userStyleName( const QString& family ) const;
-
- /**
- * Return the display name of the style specified by the user,
- * i.e. not an auto style
- */
- QString userStyleDisplayName( const QString& family ) const;
-
- /**
- * Set the type of properties that will be looked for.
- * For instance setTypeProperties("paragraph") will make hasAttribute() and attribute()
- * look into "paragraph-properties".
- * If @p typeProperties is 0, the stylestack is resetted to look for "properties"
- * as it does by default.
- */
- void setTypeProperties( const char* typeProperties );
-
- private:
- bool isUserStyle( const QDomElement& e, const QString& family ) const;
-
- private:
- /// For save/restore: stack of "marks". Each mark is an index in m_stack.
- QValueStack<int> m_marks;
-
- /**
- * We use QValueList instead of QValueStack because we need access to all styles
- * not only the top one.
- */
- QValueList<QDomElement> m_stack;
-
- QCString m_propertiesTagName;
-
- const char* m_styleNSURI;
- const char* m_foNSURI;
-
- class KoStyleStackPrivate;
- KoStyleStackPrivate *d;
-
- // forbidden
- void operator=( const KoStyleStack& );
- KoStyleStack( const KoStyleStack& );
- };
-
- #endif /* KOSTYLESTACK_H */
-