IlvScriptContext Class Reference

Scripting class. More...

#include <ilviews/base/script.h>

Public Member Functions
	IlvScriptContext (IlvScriptLanguage *, IlvScriptContext *parent)
	Constructor. More...
	IlvScriptContext (const IlSymbol *languageName, IlvScriptContext *parent)
	Constructor. More...
virtual	~IlvScriptContext ()
	Destructor. More...
IlBoolean	add (const IlvScript *script, IlBoolean compileIt=IlTrue)
	Adds a new script. More...
IlBoolean	add (IlUInt nScripts, const IlvScript *const *scripts, IlBoolean compileThem=IlTrue)
	Adds a group of scripts. More...
virtual IlBoolean	bind (IlvApplication *a, const char *name)
	Binds an application object. More...
virtual IlBoolean	bind (IlvGraphic *g, const char *name)
	Binds a graphic object. More...
virtual IlBoolean	bind (IlvView *v, const char *name)
	Binds a view object. More...
IlUInt	getCardinal () const
	Gets the number of scripts. More...
IlvScriptContext *	getGlobal () const
	Gets the global context. More...
IlUInt	getIndex (const IlvScript *script) const
	Gets the index of a script. More...
IlvScriptLanguage *	getLanguage () const
	Gets the scripting language. More...
const IlSymbol *	getLanguageName () const
	Gets the name of the scripting language. More...
IlvScriptContext *	getParent () const
	Gets the parent context. More...
IlvScript *	getScript (IlUInt rank) const
	Gets a script by index. More...
IlvScript *	getScript (const char *name) const
	Gets a script by name. More...
IlBoolean	insert (IlUInt rank, const IlvScript *script, IlBoolean compileIt=IlTrue)
	Inserts a script. More...
IlBoolean	loadScript (const char *fileName, const char *name=0, IlBoolean compileIt=IlTrue)
	Loads a script file. More...
virtual IlvScript *	read (IlvInputFile &is, const char *pathName=0, IlBoolean compileIt=IlTrue)
	Reads a script. More...
IlBoolean	remove (IlUInt rank)
	Removes a script. More...
IlBoolean	remove (IlUInt nScripts, const IlvScript *const *scripts)
	Removes a set of scripts. More...
virtual IlBoolean	unBind (IlvApplication *a)
	Unbinds an application object. More...
virtual IlBoolean	unBind (IlvGraphic *g)
	Unbinds a graphic object. More...
virtual IlBoolean	unBind (IlvView *v)
	Unbinds a view object. More...
virtual void	write (IlvOutputFile &os) const
	Saves all the scripts. More...

Static Public Member Functions
static IlvScriptContext *	GetGlobal (const IlSymbol *languageName=0)
	Gets the global context of a given script language. More...

Protected Member Functions
virtual IlBoolean	compile (const IlvScript *script)
	Compiles a script. More...
virtual IlBoolean	compileScripts ()
	Compiles all the scripts. More...

Detailed Description

Scripting class.

Library: display

This class holds the information relative to a scripting language context. Typically, the IlvScriptContext class defines the scope of variables and functions.
Script contexts are typically stored in context hierarchies that allow for definition of variables or functions that will be accessible for all child contexts, but not parents.

See Also

IlvScript, IlvScriptFunction, IlvScriptLanguage.

Constructor & Destructor Documentation

IlvScriptContext::IlvScriptContext	(	IlvScriptLanguage *	,
		IlvScriptContext *	parent
	)

Constructor.

Initializes a new, empty script context.

Parameters

language	The script language of this script context.
parent	The parent of this context.

IlvScriptContext::IlvScriptContext	(	const IlSymbol *	languageName,
		IlvScriptContext *	parent
	)

Constructor.

You will use this constructor if you want to be able to manipulate scripts and script contexts even though no scripting language has been linked.

Parameters

languageName	The name of the script language that this script context should use.
parent	The parent of this context.

virtual IlvScriptContext::~IlvScriptContext ( )

virtual

Destructor.

Releases the memory used by the script context. It includes all the scripts that were stored in this context.

Member Function Documentation

IlBoolean IlvScriptContext::add	(	const IlvScript *	script,
		IlBoolean	compileIt = IlTrue
	)

Adds a new script.

Adds a new script to the context and compiles it if compileIt is set to IlTrue. The return value is that of the call to compile or IlTrue if compileIt is set to IlFalse.

Parameters

script	A pointer to the script object to be added.
compileIt	A flag that indicates whether or not you want to compile the script when it is added.

Returns

The returned value of the call to compile if compileIt is set to IlTrue, or IlTrue if compileIt is set to IlFalse.

IlBoolean IlvScriptContext::add	(	IlUInt	nScripts,
		const IlvScript *const *	scripts,
		IlBoolean	compileThem = IlTrue
	)

Adds a group of scripts.

Parameters

nScripts	The number of scripts to be added (that is, the number of elements in the array scripts).
scripts	The array of pointers to the scripts to be added. This array must have at least nScripts elements, and is copied internally. The scripts are added but not copied.
compileThem	A flag that indicates whether or not you want to compile the scripts when they are added.

Returns

The returned value of the call to compileScript if compileThem is set to IlTrue, or IlTrue if compileThem is set to IlFalse.

virtual IlBoolean IlvScriptContext::bind ( IlvApplication *  a, const char *  name  )

virtual

Binds an application object.

This member function makes it possible for a scripting language to access an application object.

Parameters

a	The application object.
name	The name of this object, as known by this script context.

virtual IlBoolean IlvScriptContext::bind ( IlvGraphic *  g, const char *  name  )

virtual

Binds a graphic object.

This member function makes it possible for a scripting language to access a graphic object.

Parameters

g	The graphic object.
name	The name of this object, as known by this script context.

virtual IlBoolean IlvScriptContext::bind ( IlvView *  v, const char *  name  )

virtual

Binds a view object.

This member function makes it possible for a scripting language to access a view object.

Parameters

v	The view object.
name	The name of this object, as known by this script context.

virtual IlBoolean IlvScriptContext::compile ( const IlvScript *  script )

protectedvirtual

Compiles a script.

Parameters

script

The script to be compiled.

Returns

IlTrue if compilation succeeds or IlFalse if error are detected in the script.

virtual IlBoolean IlvScriptContext::compileScripts ( )

protectedvirtual

Compiles all the scripts.

Returns

IlTrue if compilation succeeds or IlFalse if errors are detected in the script.

IlUInt IlvScriptContext::getCardinal

(

)

const

Gets the number of scripts.

Returns

The number of scripts that are stored in this script context.

IlvScriptContext* IlvScriptContext::getGlobal

(

)

const

Gets the global context.

Returns

The global context of the scripting language to which the context belongs.

static IlvScriptContext* IlvScriptContext::GetGlobal ( const IlSymbol *  languageName = 0 )

static

Gets the global context of a given script language.

This member function lets you access the global context of any scripting language. If languageName is 0 (which is the default value) then the global context of the default scripting language is returned.

Parameters

languageName

The symbol that identifies the scripting language.

Returns

The global context of the scripting language whose name is stored in languageName symbol.

IlUInt IlvScriptContext::getIndex

(

const IlvScript *

script

)

const

Gets the index of a script.

Parameters

script

A pointer to the script you want to query the index.

Returns

The index of the script script in this context.

IlvScriptLanguage* IlvScriptContext::getLanguage

(

)

const

Gets the scripting language.

Returns

A pointer to the scripting language to which the context belongs.

const IlSymbol* IlvScriptContext::getLanguageName

(

)

const

Gets the name of the scripting language.

Returns

The symbol that references the name of the scripting language to which the context belongs.

IlvScriptContext* IlvScriptContext::getParent

(

)

const

Gets the parent context.

Returns

The parent context of this context, or 0 if there is none.

IlvScript* IlvScriptContext::getScript

(

IlUInt

rank

)

const

Gets a script by index.

Parameters

rank	The index of thee script you want to retrieve.

Returns

The script stored at the index rank, or 0 if rank is invalid.

IlvScript* IlvScriptContext::getScript

(

const char *

name

)

const

Gets a script by name.

Parameters

name	The name of the script you want to retrieve.

Returns

The script that has a name equal to name, or 0 if no such script is stored in this context.

IlBoolean IlvScriptContext::insert	(	IlUInt	rank,
		const IlvScript *	script,
		IlBoolean	compileIt = IlTrue
	)

Inserts a script.

Inserts a new script at the indicated position in the script list. This member function has the same behavior as the add method.

Parameters

rank	The index where the script is inserted. 0 indicates that the script will be inserted first.
script	The script to be inserted.
compileIt	A flag that indicates whether or not you want to compile the script when it is added.

Returns

The returned value of the call to compile if compileIt is set to IlTrue, or IlTrue if compileIt is set to IlFalse.

IlBoolean IlvScriptContext::loadScript	(	const char *	fileName,
		const char *	name = 0,
		IlBoolean	compileIt = IlTrue
	)

Loads a script file.

If fileName indicates a path where a valid script code is stored, a new script is created and added to the context.

Parameters

fileName	The path name of the script to be loaded.
name	The name that will be given to that script, or 0 if you don't want to name that script. This parameter is sent to the constructor of the class IlvScript.
compileIt	A flag that indicates whether or not you want to compile the script when it is added to the context.

Returns

IlTrue if the call was successful, or IlFalse if there has been an error.

virtual IlvScript* IlvScriptContext::read ( IlvInputFile &  is, const char *  pathName = 0, IlBoolean  compileIt = IlTrue  )

virtual

Reads a script.

This method is called when a Rogue Wave Views input stream is read, and when this stream contains scripts to be read. The call is performed on the script context of the holder that reads the stream. For each of the scripts that must be read, this function is called, and the created scripts are added to the context by a call to the add member function.

Parameters

is	The input stream from which the script is read.
pathName	The pathname of that script, or 0 if the script is not loaded from a stream that has a path name. This string is used to display error messages when the script is compiled (that is, when compileIt is set to IlTrue).
compileIt	A flag that indicates, when set to IlTrue, that this script should be compiled when loaded. There are situations where you don't want to compile a script at load time. you should then set this parameter to IlFalse.

Returns

A pointer to the new loaded script object, or 0 if an error occurred

IlBoolean IlvScriptContext::remove

(

IlUInt

rank

)

Removes a script.

The script is removed from the scripts list, but it is not deleted.

Parameters

rank	The index of the script to be removed.

Returns

IlTrue

IlBoolean IlvScriptContext::remove	(	IlUInt	nScripts,
		const IlvScript *const *	scripts
	)

Removes a set of scripts.

The scripts are removed from the scripts list, but they are not deleted.

Parameters

nScripts	The number of script to be removed (this is also the minimum size of the array scripts).
scripts	The array of pointers to the scripts to be removed. This array must have at least nScripts elements.

Returns

IlFalse if the array contains a script that is not found in the script context. In such case, the method does not stop and tries to remove the other scripts.

virtual IlBoolean IlvScriptContext::unBind ( IlvApplication *  a )

virtual

Unbinds an application object.

This member function removes the binding of an application object in this script context.

Parameters

a	The application object to be unbound.

virtual IlBoolean IlvScriptContext::unBind ( IlvGraphic *  g )

virtual

Unbinds a graphic object.

This member function removes the binding of a graphic object in this script context.

Parameters

g	The graphic object to be unbound.

virtual IlBoolean IlvScriptContext::unBind ( IlvView *  v )

virtual

Unbinds a view object.

This member function removes the binding of a view object in this script context.

Parameters

v	The view object to be unbound.

virtual void IlvScriptContext::write ( IlvOutputFile &  os ) const

virtual

Saves all the scripts.

After a small header, each one of the IlvScript::write member functions in all the scripts that belong to this context is called in turn.

Parameters

os	The output file where scripts will be saved.