/[suikacvs]/markup/html/scripting-parser/parser.html

Diff of /markup/html/scripting-parser/parser.html

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-revision 1.8 by wakaba,
Sun Apr 27 08:56:34 2008 UTC
+revision 1.10 by wakaba,
Sun Apr 27 10:34:18 2008 UTC
 Line 47
        var p = new Parser (new InputStream (v));
        var doc = p.doc;
        p.parse ();
        log (dumpTree (doc, ''));
+       if (p.hasAsyncScript) {
+         log ('Some script codes are executed asynchronously; it means that the document might be rendered in different ways depending on the network condition and other factors');
+       }
      }
    } // update2
-Line 73
+Line 78
      this.openElements = [doc];
      this.input = i;
      this.scriptsExecutedAfterParsing = [];
+     this.scriptsExecutedSoon = [];
    } // Parser
    Parser.prototype.getNextToken = function () {
-Line 150
+Line 156
          tagName = v.toLowerCase ();
          return '';
        });
-       e = e.replace (/^\s*([^\s=]+)\s*(?:=\s*(?:"([^"]*)"|'([^']*)'|([^"']+)))?/,
+       while (true) {
-       function (x, attrName, attrValue1, attrValue2, attrValue3) {
+         var m = false;
-         v = attrValue1 || attrValue2 || attrValue3;
+         e = e.replace (/^\s*([^\s=]+)\s*(?:=\s*(?:"([^"]*)"|'([^']*)'|([^"'\s]*)))?/,
-         v = v.replace (/&quot;/g, '"').replace (/&apos;/g, "'")
+         function (x, attrName, attrValue1, attrValue2, attrValue3) {
-             .replace (/&amp;/g, '&');
+           v = attrValue1 || attrValue2 || attrValue3;
-         attrs[attrName.toLowerCase ()] = v;
+           v = v.replace (/&quot;/g, '"').replace (/&apos;/g, "'")
-         return '';
+               .replace (/&amp;/g, '&');
-       });
+           attrs[attrName.toLowerCase ()] = v;
+           m = true;
+           return '';
+         });
+         if (!m) break;
+       }
        if (e.length) {
          log ('Broken start tag: "' + e + '"');
        }
-Line 324
+Line 335
      // "When a script completes loading" rules start applying.
-     // TODO: Handles "list of scripts that will execute as soon as possible"
+     // List of scripts that will execute as soon as possible
-     // and "list of scripts that will execute asynchronously"
+     for (var i = 0; i < this.scriptsExecutedSoon.length; i++) {
+       var e = this.scriptsExecutedSoon[i];
+       // If it has completed loading
+       log ('Execute an external script not inserted by parser...');
+       executeScript (this.doc, e);
+       // NOTE: It MAY be executed before the end of the parsing, according
+       // to the spec.
+       this.hasAsyncScript = true;
+     }
+     // TODO: Handles
+     // "list of scripts that will execute asynchronously"
      // Handle "list of scripts that will execute when the document has finished
      // parsing".
-Line 429
+Line 453
            log ('Error: There is a script that will execute as soon as the parser resumes.');
          }
          p.scriptExecutedWhenParserResumes = e;
-         log ('Running a script: aborted (src)');
+         log ('Running a script: aborted (src parser-inserted)');
        } else if (e.src != null) {
-         // TODO
+         p.scriptsExecutedSoon.push (e);
+         log ('Running a script: aborted (src)');
        } else {
          executeScript (doc, e); // even if other scripts are already executing.
        }
-Line 479
+Line 504
        var m;
        if (m = uri.match (/^javascript:\s*(?:'([^']*)'|"([^"]+)")\s*$/i)) {
          if (m[1]) {
-           return m[1];
+           return m[1].replace (/\\u([0-9A-F]{4})/g, function (s, v) {
+             return String.fromCharCode (parseInt ('0x' + v));
+           });
          } else if (m[2]) {
-           return m[2];
+           return m[2].replace (/\\u([0-9A-F]{4})/g, function (s, v) {
+             return String.fromCharCode (parseInt ('0x' + v));
+           });
          } else {
            return null;
          }
-Line 508
+Line 537
          doc.write.apply (doc, args);
          return '';
        });
+       s = s.replace (/^\s*var\s+s\s*=\s*document\.createElement\s*\(\s*['"]script['"]\s*\)\s*;\s*s\.src\s*=\s*(?:'(javascript:[^']*)'|"(javascript:[^"]*)")\s*;\s*document\.documentElement\.appendChild\s*\(\s*s\s*\)\s*;\s*/,
+       function (s, t, u) {
+         matched = true;
+         var args = [t ? t : u];
+         doc._insertExternalScript.apply (doc, args);
+         return '';
+       });
        if (s == '') break;
        if (!matched) {
          log ('Script parse error: "' + s + '"');
-Line 626
+Line 662
      return;
    }; // document.write
+   JSDocument.prototype._insertExternalScript = function (uri) {
+     var s = new JSElement (this, 'script');
+     s.src = uri;
+     this.documentElement.appendChild (s);
+   }; // _insertExternalScript
+   JSDocument.prototype.__defineGetter__ ('documentElement', function () {
+     var cn = this.childNodes;
+     for (var i = 0; i < cn.length; i++) {
+       if (cn[i] instanceof JSElement) {
+         return cn[i]
+       }
+     }
+     return null;
+   });
    JSElement.prototype.__defineGetter__ ('text', function () {
      var r = '';
      for (var i = 0; i < this.childNodes.length; i++) {
-Line 644
+Line 696
          r += '| ' + indent + node.localName + '\n';
          if (node.async) r += '| ' + indent + '  async=""\n';
          if (node.defer) r += '| ' + indent + '  defer=""\n';
-         if (node.src) r += '| ' + indent + '  src="' + node.src + '"\n';
+         if (node.src != null) {
+           r += '| ' + indent + '  src="' + node.src + '"\n';
+         }
          r += dumpTree (node, indent + '  ');
        } else if (node instanceof JSText) {
          r += '| ' + indent + '"' + node.data + '"\n';
-Line 693 
 document.write ('aaaaaaa&lt;/p>&lt;scrip
+Line 747 
 document.write ('aaaaaaa&lt;/p>&lt;scrip
  &lt;p>
  </textarea>
- <h2>Log</h2>
+ <h2 id=log>Log</h2>
  <p><output></output>
- <h2>Note</h2>
+ <h2 id=notes>Notes</h2>
  <p>This is a <em>simplified</em> implementation of
  <a href="http://www.whatwg.org/specs/web-apps/current-work/#parsing">HTML5
-Line 718 
 in <code>script</code> element.
+Line 772 
 in <code>script</code> element.
  <li>Only supports <code>script</code> <code>type</code>
  <code>text/javascript</code>.  <code>type</code> and <code>language</code>
  attributes are ignored.
- <li>Only supports <code>document.write</code>.
+ <li>Only supports limited statements.  It must consist of zero or more
- The script code must be match to the regular expression
+ of statements looking similar to the following statements, possibly
- <code>^\s*(?:document\.write\s*\(<var>v</var>\s*(?:,\s*<var>v</var>\s*)*\)\s*;\s*)*$</code>
+ introduced, followed, or separated by white space characters:
- where <var>v</var> is <code>"[^"]*"|'[^']*'</code>.
+   <ul>
+   <li><code>document.write ("<var>string</var>", ["<var>string</var>", ...]);</code>.
+   <li><code>var s = document.createElement ("script");
+             s.src = "<var>string</var>";
+             document.documentElement.appendChild (s);</code>
+   </ul>
+ Note that strings may be delimited by <code>'</code>s instead of
+ <code>"</code>s.
  <li>Only supports <code>javascript:</code>
  <abbr title="Uniform Resourace Identifiers">URI</abbr> scheme in the
  <code>src</code> attribute of the <code>script</code> element.  In addition,
  the <abbr title="Uniform Resource Identifiers">URI</abbr> must be conform to
  the regular expression <code>^javascript:\s*(?:"[^"]*"|'[^']*')\s*$</code>.
+ <li>Only supports <code>\u<var>HHHH</var></code> escapes only in
+ <code>javascript:</code> URI.
  </ul>
  <p>For some reason, this parser does not work in browsers that do
  not support JavaScript 1.5.
- <!-- TODO: multiple attributes are not supported yet -->
+ <!-- TODO: license -->
  </body>
  </html>

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Added in v.1.10
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+Added in v.1.10

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