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diff --git a/lib/fast_sanitize/fragment.ex b/lib/fast_sanitize/fragment.ex
index 79a7fed..7b314c1 100644
--- a/lib/fast_sanitize/fragment.ex
+++ b/lib/fast_sanitize/fragment.ex
@@ -1,78 +1,80 @@
defmodule FastSanitize.Fragment do
@moduledoc "Processing of HTML fragment trees."
import Plug.HTML, only: [html_escape_to_iodata: 1]
def to_tree(bin) do
with {:ok, [{:html, _, fragment}]} <-
:fast_html.decode_fragment(bin,
format: [:nil_self_closing, :comment_tuple3, :html_atoms]
) do
{:ok, fragment}
else
e ->
{:error, e}
end
end
defp build_attr_chunks([]), do: ""
defp build_attr_chunks(attrs) do
List.foldr(attrs, [], fn {k, v}, iodata ->
[[" ", html_escape_to_iodata(k), "=\"", html_escape_to_iodata(v), "\""] | iodata]
end)
end
- defp build_start_tag(tag, attrs, nil), do: ["<", to_string(tag), build_attr_chunks(attrs), "/>"]
+ defp build_self_closing_tag(tag, attrs), do: ["<", to_string(tag), build_attr_chunks(attrs), "/>"]
- defp build_start_tag(tag, attrs, _children) when attrs == [],
+ defp build_start_tag(tag, []),
do: ["<", to_string(tag), ">"]
- defp build_start_tag(tag, attrs, _children),
+ defp build_start_tag(tag, attrs),
do: ["<", to_string(tag), build_attr_chunks(attrs), ">"]
+ # text node
+ defp fragment_to_html("" <> _ = text, _), do: html_escape_to_iodata(text)
+
# empty tuple - fragment was clobbered, return nothing
defp fragment_to_html(nil, _), do: ""
defp fragment_to_html({}, _), do: ""
- # text node
- defp fragment_to_html(text, _) when is_binary(text), do: html_escape_to_iodata(text)
-
# comment node
- defp fragment_to_html({:comment, _, text}, _), do: ["<!-- ", text, " -->"]
-
- # bare subtree
- defp fragment_to_html(subtree, scrubber) when is_list(subtree) do
- subtree_to_iodata(subtree, scrubber)
- end
+ defp fragment_to_html({:comment, _, text}, _), do: ["<!--", text, "-->"]
# a node which can never accept children will have nil instead of a subtree
- defp fragment_to_html({tag, attrs, nil}, _), do: build_start_tag(tag, attrs, nil)
+ defp fragment_to_html({tag, attrs, nil}, _), do: build_self_closing_tag(tag, attrs)
# every other case, assume a subtree
defp fragment_to_html({tag, attrs, subtree}, scrubber) do
- with start_tag <- build_start_tag(tag, attrs, subtree),
- end_tag <- ["</", to_string(tag), ">"],
- subtree <- subtree_to_iodata(subtree, scrubber) do
- [start_tag, subtree, end_tag]
- end
+ start_tag = build_start_tag(tag, attrs)
+ subtree = subtree_to_iodata(subtree, scrubber)
+ [start_tag, subtree, "</", to_string(tag), ">"]
+ end
+
+ # bare subtree
+ defp fragment_to_html([], _), do: ""
+
+ defp fragment_to_html([_head | _tail] = subtree, scrubber) do
+ subtree_to_iodata(subtree, scrubber)
end
+
defp subtree_to_html([], _), do: {:ok, ""}
+
defp subtree_to_html(tree, scrubber) do
iodata = subtree_to_iodata(tree, scrubber)
rendered = :erlang.iolist_to_binary(iodata)
{:ok, rendered}
end
defp subtree_to_iodata(tree, scrubber) do
List.foldr(tree, [], fn node, iodata ->
[fragment_to_html(scrubber.scrub(node), scrubber) | iodata]
end)
end
def to_html(tree, scrubber \\ FastSanitize.Sanitizer.Dummy),
do: subtree_to_html(tree, scrubber)
end

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