From 07b27bb34c4ce32152369d202cac7a4e0c9878af Mon Sep 17 00:00:00 2001
From: QuietMisdreavus <bryan@icesoldier.me>
Date: Sat, 15 Oct 2016 10:29:47 -0500
Subject: [PATCH] rustdoc: break where clauses onto their own line if they
 don't have enough room

---
 src/librustdoc/html/format.rs          |  7 ++++++-
 src/librustdoc/html/static/rustdoc.css | 12 ++++++++++--
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/src/librustdoc/html/format.rs b/src/librustdoc/html/format.rs
index 3b2f2430993a1..5fb99a2031fb5 100644
--- a/src/librustdoc/html/format.rs
+++ b/src/librustdoc/html/format.rs
@@ -208,7 +208,12 @@ impl<'a> fmt::Display for WhereClause<'a> {
             clause.push_str("</span>");
             let plain = format!("{:#}", self);
             if plain.len() + pad.len() > 80 {
-                let padding = repeat("&nbsp;").take(pad.len() + 6).collect::<String>();
+                let padding = if pad.len() + 25 > 80 {
+                    clause = clause.replace("class='where'", "class='where fmt-newline'");
+                    repeat("&nbsp;").take(8).collect::<String>()
+                } else {
+                    repeat("&nbsp;").take(pad.len() + 6).collect::<String>()
+                };
                 clause = clause.replace("<br>", &format!("<br>{}", padding));
             } else {
                 clause = clause.replace("<br>", " ");
diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
index f8133ea49ceba..3b6ffa4a462f6 100644
--- a/src/librustdoc/html/static/rustdoc.css
+++ b/src/librustdoc/html/static/rustdoc.css
@@ -361,9 +361,17 @@ h4 > code, h3 > code, .invisible > code {
     position: relative;
 }
 /* Shift "where ..." part of method or fn definition down a line */
-.content .method .where, .content .fn .where { display: block; }
+.content .method .where,
+.content .fn .where,
+.content .where.fmt-newline {
+    display: block;
+}
 /* Bit of whitespace to indent it */
-.content .method .where::before, .content .fn .where::before { content: '  '; }
+.content .method .where::before,
+.content .fn .where::before,
+.content .where.fmt-newline::before {
+    content: '  ';
+}
 
 .content .methods > div { margin-left: 40px; }