Currently its already possible to make line lumbers linkeable. Getting
such a link however requires the end user to look at the pages source
and then to manually edit the URL, which is not a great UX.
This PR changes that to make the line numbers a link to themselves, so
clicking on them gives a link to that line that can then be passed
around, similiar to e.G. GitHub.
This currently works only when `html.WithClasses(true)` is used.
The same colors as for the pre-highlighted lines are used.
Only the line number is highlighted, so difficult to notice, but
better than nothing.
This allows the boolean options to be reconfigured, e.g:
```go
options := getOptions()
options = append(options, html.WithLineNumbers(true))
```
Fixes#301
- location and size looks fine now even when scaled and with larger files (used `em` for line height and `ch` for
width)
- svg width/height looks ok now, width has some problems on scaling (seems this needs to be a unit like `px` and cannot be `ch` so it's a rough estimate)
- updated liberation mono font to 2.00.5 since the current one had wrong width for the full block character (https://github.com/liberationfonts/liberation-fonts)
basic version without any options. colors and font-styles seem to be ok.
rough support for text background in styles like `murphy` using predrawn
rectangles (svg has no text background attribute).
things to improve:
- svg width attribute (`<svg width=""`)
- linenumbers
- highlighting
- embedded font
- tabwidth option
- margins?
- better position/width calculation (rectangles not correctly drawn on
resize)
'l' in gl is for under(l)ine, as the "gu" class is taken by
GenericSubheading.
- Rules for GenericUnderline are added to all the styles
- Make "Underline" style insert "text-decoration: underline" in CSS.
Fixes https://github.com/alecthomas/chroma/issues/159.
Since these are wrapped in a `<pre>`, newlines hint the browser that the
line numbers should be on separate lines. This helps when rendering
content with broken CSS, or in a text-only browser.
This was done to speed up incremental compilation when working on
lexers. That is, modifying a single lexer will no longer require
recompiling all lexers.
This is a (slightly) backwards breaking change in that lexers are no
longer exported directly in the lexers package. The registry API is
"aliased" at the old location.
This commits adds a div wrapper when linenumbers are formatted in table, to get the correct CSS matchers.
This commit also fixes some CSS table issues when tables are put into a larger context with other stylesheets:
* No borders.
* Overflow to fit in potentially narrower containers.
Fixes#62
