Update render-image.html

Signed-off-by: Grzegorz Godlewski <gg@gitgis.com>

Author: ggodlewski

themes/wc-eh-docs/layouts/_default/_markup/render-image.html

@@ -1,7 +1,54 @@
-{{ if strings.HasSuffix .Destination ".svg"}}
-<object type="image/svg+xml" data="{{ .Destination | safeURL }}" >
-<img src="{{ .Destination | safeURL }}" alt="{{ .Text }}" {{ with .Title}} title="{{ . }}"{{ end }} />  
+{{- $u := urls.Parse .Destination -}}
+{{- $src := $u.String -}}
+{{- if not $u.IsAbs -}}
+{{ $parsedURL := urls.Parse .Page.Site.BaseURL }}
+{{ $basePath := $parsedURL.Path }}
+{{ $markdownDir := .Page.File.Dir }}
+{{ $fullURLDir := printf "%s%s" $basePath $markdownDir }}
+{{ $imageRelativePath := .Destination }}
+{{ $imgPath := path.Join $fullURLDir $imageRelativePath }}
+{{ $imgUrl := $imgPath | relURL }}
+{{ $siteUrl := .Page.RelPermalink }}
+
+{{- $baseSegs   := split (trim $siteUrl "/") "/" -}}
+{{- $targetSegs := split (trim $imgUrl  "/") "/" -}}
+
+{{- $s := newScratch -}}
+{{- $s.Set "common" 0 -}}
+{{- $s.Set "done" false -}}
+{{- range $i, $seg := $baseSegs -}}
+  {{- if not ($s.Get "done") -}}
+    {{- if and (lt $i (len $targetSegs)) (eq $seg (index $targetSegs $i)) -}}
+      {{- $s.Set "common" (add ($s.Get "common") 1) -}}
+    {{- else -}}
+      {{- $s.Set "done" true -}}
+    {{- end -}}
+  {{- end -}}
+{{- end -}}
+
+{{- $common := $s.Get "common" -}}
+{{- $ups := sub (len $baseSegs) $common -}}
+{{- $tail := delimit (after $common $targetSegs) "/" -}}
+
+{{- $s.Set "up" "" -}}
+{{- range seq $ups -}}
+  {{- $s.Set "up" (printf "%s../" ($s.Get "up")) -}}
+{{- end -}}
+{{- $src := printf "%s%s" ($s.Get "up") $tail -}}
+
+{{ if strings.HasSuffix .Destination ".svg" }}
+<object type="image/svg+xml" data="{{ $src }}" >
+    <img src="{{ $src }}" alt="{{ .PlainText }}" {{ with .Title }} title="{{ . }}" {{ end }} />
 </object>
 {{ else }}
-<img src="{{ .Destination | safeURL }}" alt="{{ .Text }}" {{ with .Title}} title="{{ . }}"{{ end }} />
+<img src="{{ $src }}" alt="{{ .PlainText }}" {{ with .Title }} title="{{ . }}" {{ end }} />
 {{ end }}
+{{ else }}
+{{ if strings.HasSuffix .Destination ".svg" }}
+<object type="image/svg+xml" data="{{ $src }}" >
+    <img src="{{ $src }}" alt="{{ .PlainText }}" {{ with .Title }} title="{{ . }}" {{ end }} />
+</object>
+{{ else }}
+<img src="{{ $src }}" alt="{{ .PlainText }}" {{ with .Title }} title="{{ . }}" {{ end }} />
+{{ end }}
+{{- end -}}