Re: Google Summer of Code - LaTeX processing

[Ben Abbott]

On Jun 20, 2013, at 7:57 PM, Michael Goffioul wrote:

> On Thu, Jun 20, 2013 at 7:49 AM, Benjamin Abbott <address@hidden> wrote:
> On Jun 20, 2013, at 7:38 PM, Michael Goffioul <address@hidden> wrote:
> 
>> On Wed, Jun 19, 2013 at 9:57 PM, Ben Abbott <address@hidden> wrote:
>> On Jun 19, 2013, at 10:46 PM, Michael Goffioul wrote:
>> 
>> > On Wed, Jun 19, 2013 at 10:40 AM, Andrej Lojdl <address@hidden> wrote:
>> >
>> > Error message is:
>> > get: unknown text property lineheight
>> > error: called from:
>> > error:   /usr/share/octave/3.6.2/m/plot/private/__axis_label__.m at line 
>> > 30, column 3
>> > error:   /usr/share/octave/3.6.2/m/plot/title.m at line 39, column 7
>> >
>> > This may be due to the fact that you marked the option as "hidden".
>> >
>> > Michael.
>> 
>> Correct.  The hidden attribute means the command line has no access to it.  
>> I had asked the hidden attributed to be added, as I had inferred he was 
>> working on the c++ side.
>> 
>> He's working in C++, specifically modifying this to add a new parameter:
>> 
>> http://hg.savannah.gnu.org/hgweb/octave/file/0bf1d559b321/libinterp/interp-core/gl-render.cc#l2665
>> 
>> But it appears you can't get a property by name if it's hidden, even in C++. 
>> The other solution would be to use get_lineheight(), but that's not possible 
>> as you only have a base_properties object.
>> 
>> Michael.
> 
> How will write access be prevented on the m-file side?
> 
> It shouldn't be prevented, otherwise the property is useless :)
> Maybe I'm wrong, but I had the impression that a "hidden" property would not 
> appear in the list of properties (e.g. in "get(h)"), but would still be 
> readable/writable if you refer it by name.
> 
> Michael.

My expectation is that from Octave's command line, "lineheight" would be 
similar to the text object's "extent" property, but be hidden like the figure's 
looseinset property (which is still readable and writable).

That expectation is because I've assumed that the line height would not be 
something the user has control over, but would be determined in a manner 
equivalent to what is now done for the line height for "interpreter" = "tex" or 
"none".

Ben


Ben