<pre> needs background-color

[Hb---]

Wiki text inside three curly brackets {{{is delivered as <code>if no line break</code> or as

<pre>when the brackets start the line.</pre>

This variant allows syntax-highlighting with Wiki Processors.

<code> is since #15910 well displayed within the limits of the Help Browser.

<pre> has twoone remaining issues:

1. The formatting of the area lacks of a background-color (and a border, if possible). The area should look the same as in a normal web browser.
2. The result of the #!sh syntax-highlighter is wrong, i.e.
   • the line break after comment lines gets lost and
   • the colour for highlighted words gets lost too.

See the screenshot with the remaining issue in comment 10, especially the orange coloured marks for missing line breaks:

[Don-vip]

Replying to Hb---:

• the colour for highlighted words gets lost too.

This point will be impossible to fix. Swing does not provide colour syntaxing highlight for programming languages

It should possible by CSS :)

[Don-vip]

Replying to Hb---:

• the line break after comment lines gets lost and

I think Java behaviour is correct here. The line break is not inside the <pre> but inside a nested <span>. It might be a Trac bug.

[Hb---]

TracSyntaxColoring deliveres CSS like <span ...>code line <0A linefeed here></span> . Probably the Java HTML Viewer cannot display a span as block element. But all other browsers can do this.

Probably even Pygments is to blame.

[Don-vip]

Created bugeport: ​https://trac.edgewall.org/ticket/12984 Let's see what they say. Fun thing: the HTML code is correct in the bug report

[Don-vip]

In 13459/josm:

see #15998 - improve rendering of code snippets in help browser

[jun66j5]

I believe that is Java HTML viewer's issue. How about adding the following for workaround (untested)?

div.code pre span { white-space: pre }

[Don-vip]

Replying to Jun Omae <jun66j5@…>:

How about adding the following for workaround (untested)?

div.code pre span { white-space: pre }

It doesn't work. Swing CSS capabilities are very limited. Let's see if the next Trac update solves our problem.

[Hb---]

Meanwhile the new Trac version used by JOSM has solved the issue number 2. The line break character is now placed after the </span>. Syntax colours are displayed too now, probably by DonVip's fix in comment 6.