A simple package to highlight code cells in markdown files; this can be useful, for example, when editing Weave files in Juno or using Hydrogen's rich (multi) language document feature, etc.

To install:

λ apm install markdown-cell-highlight

ariake-dark-syntax	one-light syntax

• markdown-cell-highlight.targetScopes: If specified, this package will highlight code cells with the specified languages scopes. By default (i.e. ["source.embedded", "text.embedded"]), it will highlight every code cell even without language scope. E.g.: if you only want to highlight Julia code cells, you can modify this config into ["source.embedded.julia"].
• markdown-cell-highlight.markdownScopes: Specifies grammar scopes that this package will consider as markdown files and try to highlight code cells. Set to ["text.md", "source.gfm", "source.weave.md", "source.pweave.md"] by default.

You can have custom styles (i.e. custom colors, mostly) via your stylesheet:

.atom/styles.less

// style for cell body
.line.markdown-cell-highlight {
  background: @whatever-color-you-want-for-cell-body;
}
// style for cell gutter
.line-number.markdown-cell-highlight {
  background: @whatever-color-you-want-for-cell-gutter;
}

This package is under MIT License.

• Shuhei Kadowaki - undergraduate @ kyoto univ. - aviatesk