image embedding (for inline style bg images)

[clickslide] / clickslide.sh

diff --git a/clickslide.sh b/clickslide.sh
index ddc94c37ef79e44753e54fc71b670f1aef45d0f2..dcb01db6dc4b3264d00cfa3ee5dca6b7d2863c5c 100755 (executable)
--- a/clickslide.sh
+++ b/clickslide.sh
@@ -22,16 +22,29 @@ depth=0 ucdepth=-1
       line="${line#*>}"
       tag="${tag}>"
     fi
-  
+
+    ### Image embedding for Inline styles
+    while expr "$tag" : '.*<[^>]*style="[^"]*url("\?[^)]\+\.\(png\|jpg\|jpeg\|gif\|svg\)"\?)'; do
+      pre="${tag%%url(*)*}"
+      post="${tag#*url(*)}"
+      file="${tag#${pre}url(}" file="${file%)$post}"
+      file="${file#"}" file="${file%"}"
+      echo Inlining Image "$file" >&2
+      if [ -r "$file" ]; then
+        tag="${pre}url('data:image/${file##*.};base64,$(base64 <"${file}" |tr -d \\n)')${post}"
+      fi
+    done >/dev/null
+
+    ### Tag Processing
     case $tag in
-      *\<head\>*|\*\<head\ *\>)
+      *\<head\>*|\*\<head\ *\>)  # Inline styles into head
         printf '%s<meta name="viewport" content="width=device-width">
                 <style type="text/css"><!--\n' "${tag%${tag#*<head*>}}"
         cat "${0%/*}/clickslide.css"
         printf '\n--></style>%s' "${tag#*<head*>}"
         tag='' depth=$((depth + 1))
         ;;
-      *\<slide\ *id=\"?*\"*\>*)
+      *\<slide\ *id=\"?*\"*\>*)  # Count slide id, insert "next" button
         prev="$next"
         next="${tag#*<slide }" next="${next#*id=\"}" next="${next%\"*}"
         next="autoslide${idoff}"
@@ -48,25 +61,25 @@ depth=0 ucdepth=-1
           "${tag%<slide*}" "$next" "$idoff" "$next" "${tag#*<slide}"
         tag='' depth=$((depth + 1))
         ;;
-      *\</slide\>*)
+      *\</slide\>*)  # Insert "previous" button
         printf '%s</div><a class="prevslide" href="#%s">previous</a>%s' \
           "${tag%</slide>*}" "$prev" "${tag#*</slide>}"
         tag='' depth=$((depth - 1))
         ;;
-      *\<*class=\"uncover\"*\>*)
-        #printf '%s<li></li>' "$tag"
-        printf '%s' "$tag"
-        tag='' depth=$((depth + 1))
-        ucdepth=$depth
-        ;;
-      *\<body*\>*)
+      *\<body*\>*)  # Insert toplevel link
         printf '%s<a href="#" class="toplevel">overview</a>' "$tag"
         tag='' depth=$((depth + 1))
         ;;
-      *\</body*\>*)
+      *\</body*\>*)  # Insert total slide count
         printf '<span class="count">%i</span>%s' "$idoff" "$tag"
         tag='' depth=$((depth - 1))
         ;;
+      *\<*class=\"uncover\"*\>*)  # Insert checkboxes in "uncover" lists
+        #printf '%s<li></li>' "$tag"
+        printf '%s' "$tag"
+        tag='' depth=$((depth + 1))
+        ucdepth=$depth
+        ;;
       *\</*\>*)
         printf %s "$tag"
         tag='' depth=$((depth - 1))