KTextTemplate::AbstractNodeFactory Class Reference

#include <KTextTemplate/node.h>

Inheritance diagram for KTextTemplate::AbstractNodeFactory:

Public Member Functions
	AbstractNodeFactory (QObject *parent={})
	~AbstractNodeFactory () override
virtual Node *	getNode (const QString &tagContent, Parser *p) const =0
Public Member Functions inherited from QObject
	QObject (QObject *parent)
QBindable< QString >	bindableObjectName ()
bool	blockSignals (bool block)
const QObjectList &	children () const const
QMetaObject::Connection	connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const const
void	deleteLater ()
void	destroyed (QObject *obj)
bool	disconnect (const char *signal, const QObject *receiver, const char *method) const const
bool	disconnect (const QObject *receiver, const char *method) const const
void	dumpObjectInfo () const const
void	dumpObjectTree () const const
QList< QByteArray >	dynamicPropertyNames () const const
virtual bool	event (QEvent *e)
virtual bool	eventFilter (QObject *watched, QEvent *event)
T	findChild (const QString &name, Qt::FindChildOptions options) const const
QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const
QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const
QList< T >	findChildren (Qt::FindChildOptions options) const const
bool	inherits (const char *className) const const
void	installEventFilter (QObject *filterObj)
bool	isQuickItemType () const const
bool	isWidgetType () const const
bool	isWindowType () const const
void	killTimer (int id)
virtual const QMetaObject *	metaObject () const const
void	moveToThread (QThread *targetThread)
QString	objectName () const const
void	objectNameChanged (const QString &objectName)
QObject *	parent () const const
QVariant	property (const char *name) const const
	Q_CLASSINFO (Name, Value)
	Q_EMIT Q_EMIT
	Q_ENUM (...)
	Q_ENUM_NS (...)
	Q_ENUMS (...)
	Q_FLAG (...)
	Q_FLAG_NS (...)
	Q_FLAGS (...)
	Q_GADGET Q_GADGET
	Q_GADGET_EXPORT (EXPORT_MACRO)
	Q_INTERFACES (...)
	Q_INVOKABLE Q_INVOKABLE
	Q_MOC_INCLUDE Q_MOC_INCLUDE
	Q_NAMESPACE Q_NAMESPACE
	Q_NAMESPACE_EXPORT (EXPORT_MACRO)
	Q_OBJECT Q_OBJECT
	Q_PROPERTY (...)
	Q_REVISION Q_REVISION
	Q_SET_OBJECT_NAME (Object)
	Q_SIGNAL Q_SIGNAL
	Q_SIGNALS Q_SIGNALS
	Q_SLOT Q_SLOT
	Q_SLOTS Q_SLOTS
T	qobject_cast (const QObject *object)
T	qobject_cast (QObject *object)
	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT
void	removeEventFilter (QObject *obj)
void	setObjectName (const QString &name)
void	setObjectName (QAnyStringView name)
void	setParent (QObject *parent)
bool	setProperty (const char *name, const QVariant &value)
bool	setProperty (const char *name, QVariant &&value)
bool	signalsBlocked () const const
int	startTimer (int interval, Qt::TimerType timerType)
int	startTimer (std::chrono::milliseconds interval, Qt::TimerType timerType)
QThread *	thread () const const

Protected Member Functions
QList< FilterExpression >	getFilterExpressionList (const QStringList &list, Parser *p) const
Q_INVOKABLE QStringList	smartSplit (const QString &str) const
Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)
virtual void	connectNotify (const QMetaMethod &signal)
virtual void	customEvent (QEvent *event)
virtual void	disconnectNotify (const QMetaMethod &signal)
bool	isSignalConnected (const QMetaMethod &signal) const const
int	receivers (const char *signal) const const
QObject *	sender () const const
int	senderSignalIndex () const const
virtual void	timerEvent (QTimerEvent *event)

Additional Inherited Members
Public Types inherited from QObject
typedef	QObjectList
Properties inherited from QObject
	objectName
Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method, Qt::ConnectionType type)
QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)
bool	disconnect (const QMetaObject::Connection &connection)
bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *method)
bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method)
bool	disconnect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method)
QString	tr (const char *sourceText, const char *disambiguation, int n)

Detailed Description

Base class for all NodeFactories.

This class can be used to make custom tags available to templates. The getNode method should be implemented to return a Node to be rendered.

A node is represented in template markup as content surrounded by percent signed tokens.

text content
{% some_tag arg1 arg2 %}
  text content
{% some_other_tag arg1 arg2 %}
  text content
{% end_some_other_tag %}
text content

It is the responsibility of an AbstractNodeFactory implementation to process the contents of a tag and return a Node implementation from its getNode method.

The getNode method would for example be called with the tagContent "some_tag arg1 arg2". That content could then be split up, the arguments processed and a Node created

Node* SomeTagFactory::getNode(const QString &tagContent, Parser *p) {
  QStringList parts = smartSplit( tagContent );
 
  parts.removeFirst(); // Remove the "some_tag" part.
 
  FilterExpression arg1( parts.first(), p );
  FilterExpression arg2( parts.at( 1 ), p );
 
  return new SomeTagNode( arg1, arg2, p );
}

The getNode implementation might also advance the parser. For example if we had a {% times %} tag which rendered content the amount of times it was given in its argument, it could be used like this:

Some text content.
{% times 5 %}
  the bit to be repeated
{% end_times %}
End text content

The argument to {% times %} might not be a simple number, but could be a FilterExpression such as "someobject.some_property|getDigit:1".

The implementation could look like

Node* SomeOtherTagFactory::getNode(const QString &tagContent, Parser *p) {
  QStringList parts = smartSplit( tagContent );
 
  parts.removeFirst(); // Remove the "times" part.
 
  FilterExpression arg( parts.first(), p );
 
  auto node = new SomeTagNode( arg, p );
  auto childNodes = p->parse( node, "end_times" );
  node->setChildNodes( childNodes );
  p->removeNextToken();
 
  return node;
}

Note that it is necessary to invoke the parser to create the child nodes only after creating the Node to return. That node must be passed to the Parser to perform as the parent QObject to the child nodes.

See also

Parser::parse

Definition at line 293 of file node.h.

Constructor & Destructor Documentation

AbstractNodeFactory()

AbstractNodeFactory::AbstractNodeFactory ( QObject * parent = {} )

explicit

Constructor.

Parameters

parent

The parent QObject

Definition at line 188 of file node.cpp.

~AbstractNodeFactory()

AbstractNodeFactory::~AbstractNodeFactory ( )

override

Destructor.

Definition at line 194 of file node.cpp.

Member Function Documentation

getFilterExpressionList()

QList< FilterExpression > AbstractNodeFactory::getFilterExpressionList ( const QStringList & list, Parser * p ) const

protected

Returns a list of FilterExpression objects created with Parser p as described by the content of list.

This is used for convenience when handling the arguments to a tag.

Definition at line 199 of file node.cpp.

getNode()

virtual Node * KTextTemplate::AbstractNodeFactory::getNode ( const QString & tagContent, Parser * p ) const

pure virtual

This method should be reimplemented to return a Node which can be rendered.

The tagContent is the content of the tag including the tag name and arguments. For example, if the template content is {% my_tag arg1 arg2 %}, the tagContent will be "my_tag arg1 arg2".

The Parser p is available and can be advanced if appropriate. For example, if the tag has an end tag, the parser can be advanced to the end tag.

See also

tags

smartSplit()

QStringList AbstractNodeFactory::smartSplit ( const QString & str ) const

protected

Splits str into a list, taking quote marks into account.

This is typically used in the implementation of getNode with the tagContent.

If str is 'one "two three" four 'five " six' seven', the returned list will contain the following strings:

• one
• "two three"
• four
• five " six
• seven

Definition at line 208 of file node.cpp.

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The documentation for this class was generated from the following files:

• node.h
• node.cpp