background documentation and opacity support

[mmatera]

This PR adds the entry for Background in the documentation and provides support for opacity in SVG and json graphics.

[rocky]

For soft line breaks add \ at the end of the line in the above and below line.

[rocky]

Looks good. It would be nice to add a test in test/format/svg/test_svg.py

[mmatera]

https://github.com/Mathics3/mathics-core/blob/master/test%2Fbuiltin%2Fdrawing%2Ftest_plot.py#L39. Here El sáb, 20 de ene de 2024, 4:13 p. m., R. Bernstein < ***@***.***> escribió:

…

***@***.**** commented on this pull request. ------------------------------ In mathics/builtin/drawing/drawing_options.py <#969 (comment)> : > @@ -78,6 +78,32 @@ class Axis(Builtin): summary_text = "graph option value to fill plot from curve to the axis" +class Background(Builtin): + """ + <url>:WMA link:https://reference.wolfram.com/language/ref/Background.html</url> + + <dl> + <dt>'Background' + <dd>is an option that specifies the color of the background. + </dl> + + The specification must be a 'Color' or 'Automatic': + + >> Graphics3D[{Arrow[{{0,0,0},{1,0,1},{0,-1,0},{1,1,1}}]}, Background -> Red] + = -Graphics3D- + + Other values for this option are neglected. For example, this prevent to This is done already. I am not seeing any changes in https://github.com/Mathics3/mathics-core/pull/969/files any changes to test/format/test_asy.py — Reply to this email directly, view it on GitHub <#969 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAV2ZUGUEJEVHMR5NXEACWLYPQJMBAVCNFSM6AAAAABCCX6FROVHI2DSMVQWIX3LMV43YUDVNRWFEZLROVSXG5CSMV3GSZLXHMYTQMZUG4ZDANBZGA> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[rocky]

https://github.com/Mathics3/mathics-core/blob/master/test%2Fbuiltin%2Fdrawing%2Ftest_plot.py#L39. Here El sáb, 20 de ene de 2024, 4:13 p. m., R. Bernstein < @.> escribió:
…
@.* commented on this pull request. ------------------------------ In mathics/builtin/drawing/drawing_options.py <#969 (comment)> : > @@ -78,6 +78,32 @@ class Axis(Builtin): summary_text = "graph option value to fill plot from curve to the axis" +class Background(Builtin): + """ + :WMA link:https://reference.wolfram.com/language/ref/Background.html + +

+

'Background' +

is an option that specifies the color of the background. +

+ + The specification must be a 'Color' or 'Automatic': + + >> Graphics3D[{Arrow[{{0,0,0},{1,0,1},{0,-1,0},{1,1,1}}]}, Background -> Red] + = -Graphics3D- + + Other values for this option are neglected. For example, this prevent to This is done already. I am not seeing any changes in https://github.com/Mathics3/mathics-core/pull/969/files any changes to test/format/test_asy.py — Reply to this email directly, view it on GitHub <#969 (comment)>, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAV2ZUGUEJEVHMR5NXEACWLYPQJMBAVCNFSM6AAAAABCCX6FROVHI2DSMVQWIX3LMV43YUDVNRWFEZLROVSXG5CSMV3GSZLXHMYTQMZUG4ZDANBZGA . You are receiving this because you authored the thread.Message ID: @.***>

Two things. I don't see any opacity parameter or alpha channel parameter in the example. Second, unit testing at a smaller level, i.e. inside test/format/test_asy.py is easier to deal with and tends to make it easier to pinpoint problems because the tests are more focused.

[mmatera]

This change is needed to make some of the low-level tests work, especially when an Evaluation object is not available.

[rocky]

Looks great now. Merge whenever you are done/satisfied.