save as SVG button

app.py

@@ -6,7 +6,7 @@ import sys
 import tempfile
 import io
 import requests
-# from svg_to_hpgl import svgToHPGL
+from svg_to_hpgl import svgToHPGL
 
 app = Flask(__name__)
 
@@ -249,7 +249,9 @@ def hpgl (id):
 
     # store as a temporary file
     (svg_file, svg_path) = tempfile.mkstemp()
-    svg_file.write(svg)
+    print(svg_path)
+    with open(svg_path, 'w') as svg_file:
+        svg_file.write(svg)
 
     # transform to hpgl
     hpgl = svgToHPGL(svg_path)

static/css/interface.css

@@ -76,9 +76,6 @@ nav ul{
     background: black;
     color: white;
 }
-nav ul li:last-of-type{
-    display: none;
-}
 .controls{
     top: var(--bar-h);
     background-color: var(--c-back);

static/js/FileSaver.js

@@ -0,0 +1,188 @@
+(function (global, factory) {
+  if (typeof define === "function" && define.amd) {
+    define([], factory);
+  } else if (typeof exports !== "undefined") {
+    factory();
+  } else {
+    var mod = {
+      exports: {}
+    };
+    factory();
+    global.FileSaver = mod.exports;
+  }
+})(this, function () {
+  "use strict";
+
+  /*
+  * FileSaver.js
+  * A saveAs() FileSaver implementation.
+  *
+  * By Eli Grey, http://eligrey.com
+  *
+  * License : https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md (MIT)
+  * source  : http://purl.eligrey.com/github/FileSaver.js
+  */
+  // The one and only way of getting global scope in all environments
+  // https://stackoverflow.com/q/3277182/1008999
+  var _global = typeof window === 'object' && window.window === window ? window : typeof self === 'object' && self.self === self ? self : typeof global === 'object' && global.global === global ? global : void 0;
+
+  function bom(blob, opts) {
+    if (typeof opts === 'undefined') opts = {
+      autoBom: false
+    };else if (typeof opts !== 'object') {
+      console.warn('Deprecated: Expected third argument to be a object');
+      opts = {
+        autoBom: !opts
+      };
+    } // prepend BOM for UTF-8 XML and text/* types (including HTML)
+    // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF
+
+    if (opts.autoBom && /^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
+      return new Blob([String.fromCharCode(0xFEFF), blob], {
+        type: blob.type
+      });
+    }
+
+    return blob;
+  }
+
+  function download(url, name, opts) {
+    var xhr = new XMLHttpRequest();
+    xhr.open('GET', url);
+    xhr.responseType = 'blob';
+
+    xhr.onload = function () {
+      saveAs(xhr.response, name, opts);
+    };
+
+    xhr.onerror = function () {
+      console.error('could not download file');
+    };
+
+    xhr.send();
+  }
+
+  function corsEnabled(url) {
+    var xhr = new XMLHttpRequest(); // use sync to avoid popup blocker
+
+    xhr.open('HEAD', url, false);
+
+    try {
+      xhr.send();
+    } catch (e) {}
+
+    return xhr.status >= 200 && xhr.status <= 299;
+  } // `a.click()` doesn't work for all browsers (#465)
+
+
+  function click(node) {
+    try {
+      node.dispatchEvent(new MouseEvent('click'));
+    } catch (e) {
+      var evt = document.createEvent('MouseEvents');
+      evt.initMouseEvent('click', true, true, window, 0, 0, 0, 80, 20, false, false, false, false, 0, null);
+      node.dispatchEvent(evt);
+    }
+  } // Detect WebView inside a native macOS app by ruling out all browsers
+  // We just need to check for 'Safari' because all other browsers (besides Firefox) include that too
+  // https://www.whatismybrowser.com/guides/the-latest-user-agent/macos
+
+
+  var isMacOSWebView = /Macintosh/.test(navigator.userAgent) && /AppleWebKit/.test(navigator.userAgent) && !/Safari/.test(navigator.userAgent);
+  var saveAs = _global.saveAs || ( // probably in some web worker
+  typeof window !== 'object' || window !== _global ? function saveAs() {}
+  /* noop */
+  // Use download attribute first if possible (#193 Lumia mobile) unless this is a macOS WebView
+  : 'download' in HTMLAnchorElement.prototype && !isMacOSWebView ? function saveAs(blob, name, opts) {
+    var URL = _global.URL || _global.webkitURL;
+    var a = document.createElement('a');
+    name = name || blob.name || 'download';
+    a.download = name;
+    a.rel = 'noopener'; // tabnabbing
+    // TODO: detect chrome extensions & packaged apps
+    // a.target = '_blank'
+
+    if (typeof blob === 'string') {
+      // Support regular links
+      a.href = blob;
+
+      if (a.origin !== location.origin) {
+        corsEnabled(a.href) ? download(blob, name, opts) : click(a, a.target = '_blank');
+      } else {
+        click(a);
+      }
+    } else {
+      // Support blobs
+      a.href = URL.createObjectURL(blob);
+      setTimeout(function () {
+        URL.revokeObjectURL(a.href);
+      }, 4E4); // 40s
+
+      setTimeout(function () {
+        click(a);
+      }, 0);
+    }
+  } // Use msSaveOrOpenBlob as a second approach
+  : 'msSaveOrOpenBlob' in navigator ? function saveAs(blob, name, opts) {
+    name = name || blob.name || 'download';
+
+    if (typeof blob === 'string') {
+      if (corsEnabled(blob)) {
+        download(blob, name, opts);
+      } else {
+        var a = document.createElement('a');
+        a.href = blob;
+        a.target = '_blank';
+        setTimeout(function () {
+          click(a);
+        });
+      }
+    } else {
+      navigator.msSaveOrOpenBlob(bom(blob, opts), name);
+    }
+  } // Fallback to using FileReader and a popup
+  : function saveAs(blob, name, opts, popup) {
+    // Open a popup immediately do go around popup blocker
+    // Mostly only available on user interaction and the fileReader is async so...
+    popup = popup || open('', '_blank');
+
+    if (popup) {
+      popup.document.title = popup.document.body.innerText = 'downloading...';
+    }
+
+    if (typeof blob === 'string') return download(blob, name, opts);
+    var force = blob.type === 'application/octet-stream';
+
+    var isSafari = /constructor/i.test(_global.HTMLElement) || _global.safari;
+
+    var isChromeIOS = /CriOS\/[\d]+/.test(navigator.userAgent);
+
+    if ((isChromeIOS || force && isSafari || isMacOSWebView) && typeof FileReader !== 'undefined') {
+      // Safari doesn't allow downloading of blob URLs
+      var reader = new FileReader();
+
+      reader.onloadend = function () {
+        var url = reader.result;
+        url = isChromeIOS ? url : url.replace(/^data:[^;]*;/, 'data:attachment/file;');
+        if (popup) popup.location.href = url;else location = url;
+        popup = null; // reverse-tabnabbing #460
+      };
+
+      reader.readAsDataURL(blob);
+    } else {
+      var URL = _global.URL || _global.webkitURL;
+      var url = URL.createObjectURL(blob);
+      if (popup) popup.location = url;else location.href = url;
+      popup = null; // reverse-tabnabbing #460
+
+      setTimeout(function () {
+        URL.revokeObjectURL(url);
+      }, 4E4); // 40s
+    }
+  });
+  _global.saveAs = saveAs.saveAs = saveAs;
+
+  if (typeof module !== 'undefined') {
+    module.exports = saveAs;
+  }
+});

templates/draw.html

@@ -76,10 +76,6 @@
         <iframe id="svg-iframe" src="/drawing/{{params['pad']}}">
         </iframe>
     </div>
-    <aside class="right">
-      <button>> SVG</button>
-      <button>> HPGL</button>
-    </aside>
   </div>
 
 {% endblock %}

templates/drawing.html

@@ -3,10 +3,38 @@
   <head>
     <meta http-equiv="content-type" content="text/html; charset=utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <link rel="stylesheet" type="text/css" href="static/css/reset.css" />
-    <link rel="stylesheet" type="text/css" href="static/css/interface.css" />
+    <script src="/static/js/FileSaver.js"></script>
+    <style>
+      #save-svg{
+        position: fixed;
+        top: 0.5em;
+        right: 0.5em;
+      }
+    </style>
   </head>
-  <body class="">
+
+  <body>
+
     {{ svg|safe }}
+
+    <button id="save-svg">> SVG</button>
+    <!-- <button>> HPGL</button> -->
+
+    <script>
+      let save_button = document.getElementById('save-svg');
+
+      save_button.addEventListener('click', function(){
+        //get svg element.
+        let svg = document.getElementsByTagName("svg")[0];
+
+        //get svg source.
+        let serializer = new XMLSerializer();
+        let source = serializer.serializeToString(svg);
+
+        let blob = new Blob([source], {type: "text/plain;charset=utf-8"});
+        saveAs(blob, 'cobbled-paths.svg');
+      });
+    </script>
+
   </body>
 </html>