From a0aeeb7cfdef73bbf04b28a90d244fab533d5e3a Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Thu, 28 Feb 2019 17:58:58 +0100
Subject: [PATCH] Inlining images

---
 clickslide.css |  2 +-
 clickslide.sh  | 18 +++++++++++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/clickslide.css b/clickslide.css
index 174384b..3410470 100644
--- a/clickslide.css
+++ b/clickslide.css
@@ -132,7 +132,7 @@ div.slide:after {
 div.slide > * {
   margin-top: 1em;
   max-width: 85%;
-  z-index: 1;
+  overflow: hidden;
 }
 
 div.slide > *:first-child:last-child,
diff --git a/clickslide.sh b/clickslide.sh
index dcb01db..5c9d155 100755
--- a/clickslide.sh
+++ b/clickslide.sh
@@ -3,6 +3,11 @@
 prev='' next='' idoff=0
 depth=0 ucdepth=-1
 
+base64() {
+  uuencode -m - <"$1" \
+  | sed '1d; :X;$!{N;bX;}; s;\n;;g; s;=\+;;g;'
+}
+
 { "${0%/*}"/cgilite/html-sh.sed || cat; } \
 | {
   line="$(line)"
@@ -29,9 +34,20 @@ depth=0 ucdepth=-1
       post="${tag#*url(*)}"
       file="${tag#${pre}url(}" file="${file%)$post}"
       file="${file#"}" file="${file%"}"
+      echo Inlining Background Image "$file" >&2
+      if [ -r "$file" ]; then
+        tag="${pre}url('data:image/${file##*.};base64,$(base64 "$file")')${post}"
+      fi
+    done >/dev/null
+
+    ### Image embedding for Image tags
+    while expr "$tag" : '.*<img [^>]*src="[^"]\+\.\(png\|jpg\|jpeg\|gif\|svg\)"'; do
+      pre="${tag%%src=\"*\"*}"
+      post="${tag#*src=\"*\"}"
+      file="${tag#${pre}src=\"}" file="${file%\"$post}"
       echo Inlining Image "$file" >&2
       if [ -r "$file" ]; then
-        tag="${pre}url('data:image/${file##*.};base64,$(base64 <"${file}" |tr -d \\n)')${post}"
+        tag="${pre}src=\"data:image/${file##*.};base64,$(base64 "${file}")\"${post}"
       fi
     done >/dev/null
 
-- 
2.39.2