[Libreoffice] [GSoC 2011][svgexport] Get selected slides in Impress left Pane

[Marco]

On Mon, 13 Jun 2011 10:17:07 +0200, Thorsten Behrens  
<thb at documentfoundation.org> wrote:

> Marco wrote:
>> What I get is an XView object that does not support any service.
>> I look into the implementation code for SlideSorter and I found
>> out that this object, which I get, is indeed a fake XView:
>> its real type is a ViewShellWrapper from which we can get
>> a SlideSorterViewShell that owns a method to provide a
>> XDrawSubController interface for the view.
>>
> Hi Marco,
>
> wow, nice detective work - and you're almost there:

Thanks! :)

>> Now as I said my problem is that to utilize these classes I have
>> to include the headers under "sd/source/ui/inc/" but they are not
>> delivered to "solver/340/unxlngx6.pro/inc".
>> So what should I do ?
>>
> Well, this is purposefully not accessible from the outside - what
> you want to do, is to make that XDrawSubController available via
> API. A very cheap cop-out would be to add something like
> com::sun::star::beans::XMaterialHolder to the ViewShellWrapper
> interfaces (add it to ViewShellWrapperInterfaceBase, and use
> WeakComponentImplHelper5 instead of WeakComponentImplHelper4) - and
> have the implementation hand out the result of calling
> mpViewShell->CreateSubController() for that new interface.
>
> There are surely cleaner ways to do that, API-wise, e.g. by
> implementing an XPropertySet, and/or the DrawingDocumentDrawView
> service - maybe Christian has suggestions on how to best evolve
> that.

Well, the XMaterialHolder solution is more simple but really dirty:
it is a one shot method, imo. Once you have used it get something
you can't use it for anyrhing else.
The DrawingDocumentDrawView looks a too big service.
So the best compromise looks the XPropertySet interface.
A minimal implementation could be enough.
What do you think of the following one :


//-----XPropertySet  --------------------------------------------------
virtual uno::Any SAL_CALL ViewShellWrapper::getPropertyValue( const  
::rtl::OUString& PropertyName )
	throw (beans::UnknownPropertyException, lang::WrappedTargetException,  
uno::RuntimeException)
{
	uno::Any aResult;
	if( aPropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM(  
"SubController" ) ) )
	{

		Reference< drawing::XDrawSubController > xSubController;
		if( GetViewShell() )
		{
			xSubController = this->GetViewShell()->CreateSubController();
		}
		aResult <<= xSubController;
	}
	else
	{
		throw beans::UnknownPropertyException();
	}
	return aResult;
}

// the left methods are only fake implementations

virtual uno::Reference< beans::XPropertySetInfo > SAL_CALL  
ViewShellWrapper::getPropertySetInfo(  )
	throw (uno::RuntimeException)
{
	return NULL;
}

virtual void SAL_CALL ViewShellWrapper::setPropertyValue( const  
::rtl::OUString& aPropertyName, const uno::Any& aValue )
	throw (beans::UnknownPropertyException, beans::PropertyVetoException,
			lang::IllegalArgumentException, lang::WrappedTargetException,  
uno::RuntimeException)
{
	if( aPropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM(  
"SubController" ) ) )
		throw beans::PropertyVetoException();
	else
		throw beans::UnknownPropertyException();
}

virtual void SAL_CALL ViewShellWrapper::addPropertyChangeListener
	( const ::rtl::OUString& aPropertyName, const uno::Reference<  
beans::XPropertyChangeListener >& xListener )
		throw (beans::UnknownPropertyException, lang::WrappedTargetException,  
uno::RuntimeException)
{
	if( aPropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM(  
"SubController" ) ) )
		return;
	else
		throw beans::UnknownPropertyException();
}

virtual void SAL_CALL ViewShellWrapper::removePropertyChangeListener
	( const ::rtl::OUString& aPropertyName, const uno::Reference<  
beans::XPropertyChangeListener >& aListener )
		throw (beans::UnknownPropertyException, lang::WrappedTargetException,  
uno::RuntimeException)
{
	if( aPropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM(  
"SubController" ) ) )
		return;
	else
		throw beans::UnknownPropertyException();
}

virtual void SAL_CALL ViewShellWrapper::addVetoableChangeListener
	( const ::rtl::OUString& PropertyName, const uno::Reference<  
beans::XVetoableChangeListener >& aListener )
		throw (beans::UnknownPropertyException, lang::WrappedTargetException,  
uno::RuntimeException)
{
	if( aPropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM(  
"SubController" ) ) )
		return;
	else
		throw beans::UnknownPropertyException();
}

virtual void SAL_CALL ViewShellWrapper::removeVetoableChangeListener
	( const ::rtl::OUString& PropertyName, const uno::Reference<  
beans::XVetoableChangeListener >& aListener )
		throw (beans::UnknownPropertyException, lang::WrappedTargetException,  
uno::RuntimeException)
{
	if( aPropertyName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM(  
"SubController" ) ) )
		return;
	else
		throw beans::UnknownPropertyException();
}
//---------------------------------------------------------------------------------------



It is not elegant, but it provides what I need and in the future
if someone needs other properties he will be able to extend it.



> That said, I'd put lower priority on this for the moment, and
> instead get back to the java script and master page parts.

I would like to implemement some code to handle variable text
fields like page numbers and dates, but there is two issue:
1) text is exported by tspan svg tags where it is set up
the position of each character;
2) it looks that only used character glyphs are available,
so I could have the glyph for "1" but not the glyph for "2"
or I could have all glyphs for write "June 15, 2011" but not
for "July 7, 2011" and so on.


Cheers,
    Marco



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