Cutelee::Engine is the main entry point for creating Cutelee Templates. More...

#include <cutelee/engine.h>

Inheritance diagram for Cutelee::Engine:

Public Member Functions
	Engine (QObject *parent=nullptr)
	~Engine () override
void	addDefaultLibrary (const QString &libName)
void	addPluginPath (const QString &dir)
void	addTemplateLoader (std::shared_ptr< AbstractTemplateLoader > loader)
QStringList	defaultLibraries () const
void	insertDefaultLibrary (const QString &name, TagLibraryInterface *lib)
void	insertLibrary (const QString &name, TagLibraryInterface *lib)
Template	loadByName (const QString &name) const
std::pair< QString, QString >	mediaUri (const QString &fileName) const
Template	newTemplate (const QString &content, const QString &name) const
QStringList	pluginPaths () const
void	removeDefaultLibrary (const QString &libName)
void	removePluginPath (const QString &dir)
void	setPluginPaths (const QStringList &dirs)
void	setSmartTrimEnabled (bool enabled)
bool	smartTrimEnabled () const
QList< std::shared_ptr< AbstractTemplateLoader > >	templateLoaders ()
Public Member Functions inherited from QObject
	QObject (QObject *parent)
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 ()
void	dumpObjectInfo () const const
void	dumpObjectTree ()
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 QRegExp &regExp, 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
bool	inherits (const char *className) const const
void	installEventFilter (QObject *filterObj)
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, QPrivateSignal)
QObject *	parent () const const
QVariant	property (const char *name) const const
	Q_CLASSINFO (Name, Value)
	Q_DISABLE_COPY (Class)
	Q_DISABLE_COPY_MOVE (Class)
	Q_DISABLE_MOVE (Class)
	Q_EMIT Q_EMIT
	Q_ENUM (...)
	Q_ENUM_NS (...)
	Q_ENUMS (...)
	Q_FLAG (...)
	Q_FLAG_NS (...)
	Q_FLAGS (...)
	Q_GADGET Q_GADGET
	Q_INTERFACES (...)
	Q_INVOKABLE Q_INVOKABLE
	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	qFindChild (const QObject *obj, const QString &name)
QList< T >	qFindChildren (const QObject *obj, const QRegExp &regExp)
QList< T >	qFindChildren (const QObject *obj, const QString &name)
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	setParent (QObject *parent)
bool	setProperty (const char *name, const QVariant &value)
bool	signalsBlocked () const const
int	startTimer (int interval, Qt::TimerType timerType)
int	startTimer (std::chrono::milliseconds time, Qt::TimerType timerType)
QThread *	thread () const const

Additional Inherited Members
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)
QString	trUtf8 (const char sourceText, const char disambiguation, int n)
Public Attributes inherited from QObject
typedef	QObjectList
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)
Properties inherited from QObject
	objectName

Detailed Description

The Cutelee::Engine is responsible for configuring and creating Template objects. In typical use, one or more AbstractTemplateLoader objects will be added to the Engine to load template objects, and plugin directories will be set to enable finding template tags and filters.

auto engine = new Engine();
 
auto loader = std::shared_ptr<FileSystemTemplateLoader>::create();
loader->setTemplateDirs( {"/usr/share/myapp/templates"} );
engine->addTemplateLoader( loader );
 
engine->addPluginPath( "/usr/lib/myapp" );
 
auto template1 = engine->newTemplate( "Template content", "template name" );
 
auto template2 = engine->loadByName( "templatefile.html" );

Once it is configured, the Engine can be used to create new templates by name by loading the templates with the loadByName method, or by defining the content in the newTemplate method.

By default the builtin tags and filters distributed with Cutelee are available in all templates without using the {% load %} tag in the template. These pre-loaded libraries may be configured if appropriate to the application. For example, an application which defines its own tags and filters may want them to be always available, or it may be desirable to restrict the features available to template authors by removing built in libraries.

Different Engine objects can be used to create templates with differing configurations.

Insignificant whitespace

The output of rendering a template depends on the content of the template. In some cases when generating content in which whitespace is significant, this can have undesired effects. For example, given a template to generate C++ code like:

  class MyClass {
  {# This loop creates the  #}
  {# methods in the class   #}
  {% for method in methods %}
    {% if method.hasDox %}
      {{ method.dox }}
    {% endif %}
      {{ method.signature }}
  {% endfor %}
  };

The output would have a lot of whitespace which is not necessarily wanted.

class MyClass {
 
  void foo() const;
 
};

It is possible to strip insignificant whitespace by enabling the smartTrim feature with setSmartTrimEnabled. When enabled the output will not contain a newline for any line in the template which has only one token of template syntax, such as a comment, tag or variable.

class MyClass {
 
  void foo() const;
};

Author: Stephen Kelly steve.nosp@m.ire@.nosp@m.gmail.nosp@m..com

Definition at line 120 of file engine.h.

Constructor & Destructor Documentation

◆ Engine()

Engine::Engine ( QObject * parent = nullptr )

Constructor

Definition at line 42 of file engine.cpp.

References QObject::QObject(), QString::fromLocal8Bit(), QCoreApplication::instance(), QCoreApplication::libraryPaths(), and QObject::parent().

Referenced by addDefaultLibrary(), addPluginPath(), addTemplateLoader(), defaultLibraries(), insertDefaultLibrary(), insertLibrary(), loadByName(), mediaUri(), newTemplate(), pluginPaths(), removeDefaultLibrary(), removePluginPath(), setPluginPaths(), setSmartTrimEnabled(), smartTrimEnabled(), and templateLoaders().

◆ ~Engine()

Engine::~Engine ( )

override

Destructor.

Definition at line 53 of file engine.cpp.

Member Function Documentation

◆ addDefaultLibrary()

void Engine::addDefaultLibrary ( const QString & libName )

Adds the library named libName to the libraries available by default to new Templates.

Definition at line 120 of file engine.cpp.

References Engine().

◆ addPluginPath()

void Engine::addPluginPath ( const QString & dir )

Prepend dir to the list of plugin dirs.

Definition at line 93 of file engine.cpp.

References Engine().

◆ addTemplateLoader()

void Engine::addTemplateLoader ( std::shared_ptr< AbstractTemplateLoader > loader )

Adds loader to the TemplateLoaders currently configured on the Engine.

Definition at line 68 of file engine.cpp.

References Engine().

◆ defaultLibraries()

QStringList Engine::defaultLibraries ( ) const

Returns the libraries available by default to new Templates.

Definition at line 114 of file engine.cpp.

References Engine().

Referenced by Cutelee::Parser::Parser().

◆ insertDefaultLibrary()

void Engine::insertDefaultLibrary	(	const QString &	name,
		TagLibraryInterface *	lib )

Inserts the tag library lib without requiring to load a plugin and adds it to the list of libraries available by default to new Templates.

See also: insertLibrary

Definition at line 231 of file engine.cpp.

References Engine(), and insertLibrary().

◆ insertLibrary()

void Engine::insertLibrary	(	const QString &	name,
		TagLibraryInterface *	lib )

Inserts the tag library lib without requiring to load a plugin.

In your template you need to use {% load name %} to make the tags and filters of this library available.

See also: insertDefaultLibrary

Definition at line 224 of file engine.cpp.

References Engine().

Referenced by insertDefaultLibrary().

◆ loadByName()

Template Engine::loadByName ( const QString & name ) const

Load the Template identified by name.

The Templates and plugins loaded will be determined by the Engine configuration.

Definition at line 370 of file engine.cpp.

References Engine().

◆ mediaUri()

std::pair< QString, QString > Engine::mediaUri ( const QString & fileName ) const

Returns a URI for a media item with the name name.

Typically this will be used for images. For example the media URI for the image "header_logo.png" may be "/home/user/common/header_logo.png" or "/home/user/some_theme/header_logo.png" depending on the templateLoaders configured.

This method will not usually be called by application code. To load media in a template, use the {% media_finder %} template tag.

Definition at line 74 of file engine.cpp.

References Engine().

◆ newTemplate()

Template Engine::newTemplate	(	const QString &	content,
		const QString &	name ) const

Create a new Template with the content content identified by name.

The secondary Templates and plugins loaded will be determined by the Engine configuration.

Definition at line 391 of file engine.cpp.

References Engine().

Referenced by Cutelee::FileSystemTemplateLoader::loadByName(), and Cutelee::InMemoryTemplateLoader::loadByName().

◆ pluginPaths()

QStringList Engine::pluginPaths ( ) const

Returns the currently configured plugin dirs

Definition at line 108 of file engine.cpp.

References Engine().

◆ removeDefaultLibrary()

void Engine::removeDefaultLibrary ( const QString & libName )

Removes the library named libName from the libraries available by default to new Templates.

Definition at line 126 of file engine.cpp.

References Engine().

◆ removePluginPath()

void Engine::removePluginPath ( const QString & dir )

Removes all instances of dir from the list of plugin dirs.

Definition at line 102 of file engine.cpp.

References Engine().

◆ setPluginPaths()

void Engine::setPluginPaths ( const QStringList & dirs )

Sets the plugin dirs currently configured on the Engine to dirs.

Warning: This overwrites the default paths. You normally want addPluginPath.

See also: Finding tags and filters

Definition at line 87 of file engine.cpp.

References Engine().

◆ setSmartTrimEnabled()

void Engine::setSmartTrimEnabled ( bool enabled )

Sets whether the smart trim feature is enabled for newly loaded templates.

See also: smart_trim

Definition at line 400 of file engine.cpp.

References Engine().

◆ smartTrimEnabled()

bool Engine::smartTrimEnabled ( ) const

Returns whether the smart trim feature is enabled for newly loaded templates.

See also: smart_trim

This is false by default.

Definition at line 406 of file engine.cpp.

References Engine().

◆ templateLoaders()

QList< std::shared_ptr< AbstractTemplateLoader > > Engine::templateLoaders ( )

Returns the TemplateLoaders currently configured on the Engine.

Definition at line 62 of file engine.cpp.

References Engine().

Public Member Functions

Additional Inherited Members

Detailed Description

Insignificant whitespace

Constructor & Destructor Documentation

◆ Engine()

◆ ~Engine()

Member Function Documentation

◆ addDefaultLibrary()

◆ addPluginPath()

◆ addTemplateLoader()

◆ defaultLibraries()

◆ insertDefaultLibrary()

◆ insertLibrary()

◆ loadByName()

◆ mediaUri()

◆ newTemplate()

◆ pluginPaths()

◆ removeDefaultLibrary()

◆ removePluginPath()

◆ setPluginPaths()

◆ setSmartTrimEnabled()

◆ smartTrimEnabled()

◆ templateLoaders()