From: Ben Harris <bjh21@bjh21.me.uk>
Date: Sun, 14 Sep 2025 18:37:56 +0000 (+0100)
Subject: webstead: SVG rendering by extremely crude regexps
X-Git-Tag: bedstead-3.261~67
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~bjharris/git?a=commitdiff_plain;h=111484a4f1d1fa5d4548aa8d97b19dbf4998edcc;p=bedstead.git

webstead: SVG rendering by extremely crude regexps
---

diff --git a/webstead.xhtml b/webstead.xhtml
index 50d61d8..2971540 100644
--- a/webstead.xhtml
+++ b/webstead.xhtml
@@ -8,8 +8,16 @@
       document.getElementById("run").onclick = function(){
           Bedstead({
               arguments: document.getElementById("input").value.split(" "),
-              print: function(text) {
-                  document.getElementById("output").textContent = text;
+              print: function(charstring) {
+                  document.getElementById("output").textContent = charstring;
+                  document.getElementById("rendered")
+                      .setAttribute("d", charstring
+                                    .replaceAll(/<!--(?:[^-]|-[^-])*-->/g, "")
+                                    .replace(/^.* [hv]stem /, "")
+                                    .replace(/^/, "m ")
+                                    .replaceAll(/ rmoveto/g, "")
+                                    .replaceAll(/ rlineto/g, "m")
+                                    .replace(/ endchar/, ""));
               }
           });
       };
@@ -23,5 +31,10 @@
       <input type="button" id="run" value="Run!"/>
     </form>
     <p><code id="output"></code></p>
+    <div>
+      <svg width="600" height="1000"  xmlns="http://www.w3.org/2000/svg">
+        <path id="rendered" fill="currentColor"/>
+      </svg>
+    </div>
   </body>
 </html>