From fdfc961f3421b02880152f5b4109de5a1f1d3b00 Mon Sep 17 00:00:00 2001
From: Alex Hogen <code.ahogen@outlook.com>
Date: Mon, 12 Mar 2018 17:13:48 -0700
Subject: [PATCH] Support external header images

Close #461 and #488
---
 layouts/partials/header_image.html            | 8 +++++++-
 layouts/partials/post_li.html                 | 7 ++++++-
 layouts/partials/publication_li_detailed.html | 7 ++++++-
 layouts/partials/talk_li_detailed.html        | 7 ++++++-
 4 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/layouts/partials/header_image.html b/layouts/partials/header_image.html
index 3dae9f35..9d63a486 100644
--- a/layouts/partials/header_image.html
+++ b/layouts/partials/header_image.html
@@ -1,6 +1,12 @@
 {{ if .Params.header.image }}
 <div class="article-header">
-  <img src="{{ "/img/" | relURL }}{{ .Params.header.image }}" class="article-banner" itemprop="image">
+  {{ $img_src := urls.Parse .Params.header.image }}
+  {{ if $img_src.Scheme }}
+    <img src="{{ .Params.header.image }}" class="article-banner" itemprop="image">
+  {{ else }}
+    <img src="{{ "/img/" | relURL }}{{ .Params.header.image }}" class="article-banner" itemprop="image">
+  {{ end }}
+
   {{ with .Params.header.caption }}<span class="article-header-caption">{{ . | markdownify | emojify }}</span>{{ end }}
 </div>
 {{end}}
diff --git a/layouts/partials/post_li.html b/layouts/partials/post_li.html
index c457e66f..de598735 100644
--- a/layouts/partials/post_li.html
+++ b/layouts/partials/post_li.html
@@ -6,7 +6,12 @@
   {{ $preview := $post.Params.header.preview | default true }}
   {{ if and $post.Params.header.image $preview }}
   <a href="{{ $post.Permalink }}">
-    <img src="{{ "/img/" | relURL }}{{ $post.Params.header.image }}" class="article-banner" itemprop="image">
+    {{ $img_src := urls.Parse $post.Params.header.image }}
+    {{ if $img_src.Scheme }}
+      <img src="{{ $post.Params.header.image }}" class="article-banner" itemprop="image">
+    {{ else }}
+      <img src="{{ "/img/" | relURL }}{{ $post.Params.header.image }}" class="article-banner" itemprop="image">
+    {{ end }}
   </a>
   {{end}}
   <h3 class="article-title" itemprop="headline">
diff --git a/layouts/partials/publication_li_detailed.html b/layouts/partials/publication_li_detailed.html
index 4746da33..50070358 100644
--- a/layouts/partials/publication_li_detailed.html
+++ b/layouts/partials/publication_li_detailed.html
@@ -8,7 +8,12 @@
   {{ if .Scratch.Get "image" }}
   <div>
     <a href="{{ .Permalink }}">
-      <img src="{{ "/img/" | relURL }}{{ .Scratch.Get "image" }}" class="pub-banner" itemprop="image">
+      {{ $img_src := urls.Parse .Scratch.Get "image" }}
+      {{ if $img_src.Scheme }}
+        <img src="{{ .Scratch.Get "image" }}" class="article-banner" itemprop="image">
+      {{ else }}
+        <img src="{{ "/img/" | relURL }}{{ .Scratch.Get "image" }}" class="article-banner" itemprop="image">
+      {{ end }}      
     </a>
   </div>
   {{ end }}
diff --git a/layouts/partials/talk_li_detailed.html b/layouts/partials/talk_li_detailed.html
index 35a9998f..74ca5d61 100644
--- a/layouts/partials/talk_li_detailed.html
+++ b/layouts/partials/talk_li_detailed.html
@@ -8,7 +8,12 @@
   {{ if .Scratch.Get "image" }}
   <div>
     <a href="{{ .Permalink }}">
-      <img src="{{ "/img/" | relURL }}{{ .Scratch.Get "image" }}" class="pub-banner" itemprop="image">
+      {{ $img_src := urls.Parse .Scratch.Get "image" }}
+      {{ if $img_src.Scheme }}
+        <img src="{{ .Scratch.Get "image" }}" class="article-banner" itemprop="image">
+      {{ else }}
+        <img src="{{ "/img/" | relURL }}{{ .Scratch.Get "image" }}" class="article-banner" itemprop="image">
+      {{ end }} 
     </a>
   </div>
   {{ end }}