EarmarkTagCloud

Usage without Earmark

An Earmark Plugin to easily create tag clouds inside Markdown Documents.

In its default configuration it translates a list of lines containing keywords with three metric values to html, here is a simple example

  iex> doc = [
  ...> { "ruby 10 100 4", 1},
  ...> { "elixir 40 800 12", 2},
  ...> ]
  ...> EarmarkTagCloud.as_html(doc)
  {[ "<div class=\"earmark-tag-cloud\">\n",
     "  <span style=\"color: #d4d4d4; font-size: 10pt; font-weight: 100;\">ruby</span>\n",
     "  <span style=\"color: #000000; font-size: 40pt; font-weight: 800;\">elixir</span>\n",
     "</div>\n"
  ], []}

As we can see from the example above the three numeric values above are specifiying

font size in pts
font weight
scale or color Either a scale value between 0 (white) and 12 (black) that matches to 13 gamma corrected shades of the color. Or a specific color value expressed in CSS format that is # followed by six hex digits, e.g. #ff0000 for red One can change the settings to more grades, even 50, if you want, by means of parameters, c.f. Parameterization for the details

We can also set parameters like the font-family, or the div-classes

  iex> doc = [
  ...> { "set font-family Times", 1},
  ...> { "set div-classes my-tags", 2},
  ...> { "ruby 10 100 4", 3},
  ...> { "elixir 40 800 12", 4},
  ...> ]
  ...> EarmarkTagCloud.as_html(doc)
  {[ "<div class=\"my-tags\" style=\"font-family: Times;\">\n",
     "  <span style=\"color: #d4d4d4; font-size: 10pt; font-weight: 100;\">ruby</span>\n",
     "  <span style=\"color: #000000; font-size: 40pt; font-weight: 800;\">elixir</span>\n",
     "</div>\n"
  ], []}

Here is a different example, better suited to the corresponding languages

  iex> doc = [
  ...> { "set font-family Times", 1},
  ...> { "set div-classes my-tags", 2},
  ...> { "ruby 10 100 #d40000", 3},
  ...> { "elixir 40 800 #0000ff", 4},
  ...> ]
  ...> EarmarkTagCloud.as_html(doc)
  {[ "<div class=\"my-tags\" style=\"font-family: Times;\">\n",
     "  <span style=\"color: #d40000; font-size: 10pt; font-weight: 100;\">ruby</span>\n",
     "  <span style=\"color: #0000ff; font-size: 40pt; font-weight: 800;\">elixir</span>\n",
     "</div>\n"
  ], []}

This is exposed to be used without Elixir, e.g. in a Phoenix App Template

  iex(1)> EarmarkTagCloud.one_tag("elixir 40 800 12")
  {:ok, "  <span style=\"color: #000000; font-size: 40pt; font-weight: 800;\">elixir</span>\n"}

In these cases overriding the generated tag (span might be useful)

  iex(2)> EarmarkTagCloud.one_tag("Erlang 20 600 #0000aa", tag: "p")
  {:ok, "  <p style=\"color: #0000aa; font-size: 20pt; font-weight: 600;\">Erlang</p>\n"}

Usage with Earmark

If following lines are

... normal markdown
$$ ruby 10 100 4
$$ elixir 40 800 12
... still more normal markdown

read into lines

Earmark.as_html(lines, Earmark.Plugin.define(EarmarkTagCloud))

Please see Earmark for more details of how to use plugins

COPYRIGHT & LICENSE

Apache 2 License

See file LICENSE for details.

Installation

Available in Hex, the package can be installed as:

Add earmark_tag_cloud to your list of dependencies in mix.exs:

```elixir
def deps do
  [{:earmark_tag_cloud, "~> 0.1.0"}]
end
```

Ensure earmark_tag_cloud is started before your application:

```elixir
def application do
  [applications: [:earmark_tag_cloud]]
end
```