#878 URI_Templates named fields and pngwalk tool, other improvements

[Jeremy Faden]

(1) URI_Templates can have named fields, like

https://spdf.gsfc.nasa.gov/pub/data/cluster/c$(enum;values=1,2,3,4;id=sc)/graphics/orbit_overview/$Y/c$(enum;values=1,2,3,4;id=sc)_cg_aux_caa_orbit_overview_gif_$Y$m$d_v$x.gif

and the PNGWalkTool should indicate these on the display. In this case "01" is displayed but is this the version (v$x) or the $(enum;values=1,2,3,4;id=sc)?

(2) It would be fun to have a droplist next to "limit range to" which would allow any,1,2,3, or 4 to be selected.

(3) Also there is excessive listing. It should list just enough to provide the initial display. This is a known problem that was acceptable back in 2010, but should have been fixed by now.

(4) off-screen pngs should be loaded so that they are ready when scrolling is used. "10 of 15150 images loaded" message should be reveiwed. Is this correct? This could be "30 of 15150" and performance would be nicer.

[Jeremy Faden]

(5) Also a "copy filename to clipboard" action, I was looking for this yesterday.

[Jeremy Faden]

See also rte_1137657428, where

https://spdf.gsfc.nasa.gov/pub/data/cluster/c$(enum;values=1,2,3,4;id=sc)/graphics/orbit_particles1/$Y/c$(enum;values=1,2,3,4;id=sc)_cg_aux_caa_orbit_particles1_gif_$Y$m$d_v$x.gif?timerange=2007-01-01&avail=T

results in the runtime exception

java.lang.RuntimeException: java.lang.IllegalArgumentException: "sc is undefined in extras.