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common/html-parser.js

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+/*
+ * HTML5 Parser By Sam Blowes
+ *
+ * Designed for HTML5 documents
+ *
+ * Original code by John Resig (ejohn.org)
+ * http://ejohn.org/blog/pure-javascript-html-parser/
+ * Original code by Erik Arvidsson, Mozilla Public License
+ * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
+ *
+ * ----------------------------------------------------------------------------
+ * License
+ * ----------------------------------------------------------------------------
+ *
+ * This code is triple licensed using Apache Software License 2.0,
+ * Mozilla Public License or GNU Public License
+ *
+ * ////////////////////////////////////////////////////////////////////////////
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License.  You may obtain a copy
+ * of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * ////////////////////////////////////////////////////////////////////////////
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Simple HTML Parser.
+ *
+ * The Initial Developer of the Original Code is Erik Arvidsson.
+ * Portions created by Erik Arvidssson are Copyright (C) 2004. All Rights
+ * Reserved.
+ *
+ * ////////////////////////////////////////////////////////////////////////////
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * ----------------------------------------------------------------------------
+ * Usage
+ * ----------------------------------------------------------------------------
+ *
+ * // Use like so:
+ * HTMLParser(htmlString, {
+ *     start: function(tag, attrs, unary) {},
+ *     end: function(tag) {},
+ *     chars: function(text) {},
+ *     comment: function(text) {}
+ * });
+ *
+ * // or to get an XML string:
+ * HTMLtoXML(htmlString);
+ *
+ * // or to get an XML DOM Document
+ * HTMLtoDOM(htmlString);
+ *
+ * // or to inject into an existing document/DOM node
+ * HTMLtoDOM(htmlString, document);
+ * HTMLtoDOM(htmlString, document.body);
+ *
+ */
+// Regular Expressions for parsing tags and attributes
+var startTag = /^<([-A-Za-z0-9_]+)((?:\s+[a-zA-Z_:][-a-zA-Z0-9_:.]*(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)>/;
+var endTag = /^<\/([-A-Za-z0-9_]+)[^>]*>/;
+var attr = /([a-zA-Z_:][-a-zA-Z0-9_:.]*)(?:\s*=\s*(?:(?:"((?:\\.|[^"])*)")|(?:'((?:\\.|[^'])*)')|([^>\s]+)))?/g; // Empty Elements - HTML 5
+
+var empty = makeMap('area,base,basefont,br,col,frame,hr,img,input,link,meta,param,embed,command,keygen,source,track,wbr'); // Block Elements - HTML 5
+// fixed by xxx 将 ins 标签从块级名单中移除
+
+var block = makeMap('a,address,article,applet,aside,audio,blockquote,button,canvas,center,dd,del,dir,div,dl,dt,fieldset,figcaption,figure,footer,form,frameset,h1,h2,h3,h4,h5,h6,header,hgroup,hr,iframe,isindex,li,map,menu,noframes,noscript,object,ol,output,p,pre,section,script,table,tbody,td,tfoot,th,thead,tr,ul,video'); // Inline Elements - HTML 5
+
+var inline = makeMap('abbr,acronym,applet,b,basefont,bdo,big,br,button,cite,code,del,dfn,em,font,i,iframe,img,input,ins,kbd,label,map,object,q,s,samp,script,select,small,span,strike,strong,sub,sup,textarea,tt,u,var'); // Elements that you can, intentionally, leave open
+// (and which close themselves)
+
+var closeSelf = makeMap('colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr'); // Attributes that have their values filled in disabled="disabled"
+
+var fillAttrs = makeMap('checked,compact,declare,defer,disabled,ismap,multiple,nohref,noresize,noshade,nowrap,readonly,selected'); // Special Elements (can contain anything)
+
+var special = makeMap('script,style');
+function HTMLParser(html, handler) {
+  var index;
+  var chars;
+  var match;
+  var stack = [];
+  var last = html;
+
+  stack.last = function () {
+    return this[this.length - 1];
+  };
+
+  while (html) {
+    chars = true; // Make sure we're not in a script or style element
+
+    if (!stack.last() || !special[stack.last()]) {
+      // Comment
+      if (html.indexOf('<!--') == 0) {
+        index = html.indexOf('-->');
+
+        if (index >= 0) {
+          if (handler.comment) {
+            handler.comment(html.substring(4, index));
+          }
+
+          html = html.substring(index + 3);
+          chars = false;
+        } // end tag
+
+      } else if (html.indexOf('</') == 0) {
+        match = html.match(endTag);
+
+        if (match) {
+          html = html.substring(match[0].length);
+          match[0].replace(endTag, parseEndTag);
+          chars = false;
+        } // start tag
+
+      } else if (html.indexOf('<') == 0) {
+        match = html.match(startTag);
+
+        if (match) {
+          html = html.substring(match[0].length);
+          match[0].replace(startTag, parseStartTag);
+          chars = false;
+        }
+      }
+
+      if (chars) {
+        index = html.indexOf('<');
+        var text = index < 0 ? html : html.substring(0, index);
+        html = index < 0 ? '' : html.substring(index);
+
+        if (handler.chars) {
+          handler.chars(text);
+        }
+      }
+    } else {
+      html = html.replace(new RegExp('([\\s\\S]*?)<\/' + stack.last() + '[^>]*>'), function (all, text) {
+        text = text.replace(/<!--([\s\S]*?)-->|<!\[CDATA\[([\s\S]*?)]]>/g, '$1$2');
+
+        if (handler.chars) {
+          handler.chars(text);
+        }
+
+        return '';
+      });
+      parseEndTag('', stack.last());
+    }
+
+    if (html == last) {
+      throw 'Parse Error: ' + html;
+    }
+
+    last = html;
+  } // Clean up any remaining tags
+
+
+  parseEndTag();
+
+  function parseStartTag(tag, tagName, rest, unary) {
+    tagName = tagName.toLowerCase();
+
+    if (block[tagName]) {
+      while (stack.last() && inline[stack.last()]) {
+        parseEndTag('', stack.last());
+      }
+    }
+
+    if (closeSelf[tagName] && stack.last() == tagName) {
+      parseEndTag('', tagName);
+    }
+
+    unary = empty[tagName] || !!unary;
+
+    if (!unary) {
+      stack.push(tagName);
+    }
+
+    if (handler.start) {
+      var attrs = [];
+      rest.replace(attr, function (match, name) {
+        var value = arguments[2] ? arguments[2] : arguments[3] ? arguments[3] : arguments[4] ? arguments[4] : fillAttrs[name] ? name : '';
+        attrs.push({
+          name: name,
+          value: value,
+          escaped: value.replace(/(^|[^\\])"/g, '$1\\\"') // "
+
+        });
+      });
+
+      if (handler.start) {
+        handler.start(tagName, attrs, unary);
+      }
+    }
+  }
+
+  function parseEndTag(tag, tagName) {
+    // If no tag name is provided, clean shop
+    if (!tagName) {
+      var pos = 0;
+    } // Find the closest opened tag of the same type
+    else {
+        for (var pos = stack.length - 1; pos >= 0; pos--) {
+          if (stack[pos] == tagName) {
+            break;
+          }
+        }
+      }
+
+    if (pos >= 0) {
+      // Close all the open elements, up the stack
+      for (var i = stack.length - 1; i >= pos; i--) {
+        if (handler.end) {
+          handler.end(stack[i]);
+        }
+      } // Remove the open elements from the stack
+
+
+      stack.length = pos;
+    }
+  }
+}
+
+function makeMap(str) {
+  var obj = {};
+  var items = str.split(',');
+
+  for (var i = 0; i < items.length; i++) {
+    obj[items[i]] = true;
+  }
+
+  return obj;
+}
+
+function removeDOCTYPE(html) {
+  return html.replace(/<\?xml.*\?>\n/, '').replace(/<!doctype.*>\n/, '').replace(/<!DOCTYPE.*>\n/, '');
+}
+
+function parseAttrs(attrs) {
+  return attrs.reduce(function (pre, attr) {
+    var value = attr.value;
+    var name = attr.name;
+
+    if (pre[name]) {
+			pre[name] = pre[name] + " " + value;
+    } else {
+			pre[name] = value;
+    }
+
+    return pre;
+  }, {});
+}
+
+function parseHtml(html) {
+  html = removeDOCTYPE(html);
+  var stacks = [];
+  var results = {
+    node: 'root',
+    children: []
+  };
+  HTMLParser(html, {
+    start: function start(tag, attrs, unary) {
+      var node = {
+        name: tag
+      };
+
+      if (attrs.length !== 0) {
+        node.attrs = parseAttrs(attrs);
+      }
+
+      if (unary) {
+        var parent = stacks[0] || results;
+
+        if (!parent.children) {
+          parent.children = [];
+        }
+
+        parent.children.push(node);
+      } else {
+        stacks.unshift(node);
+      }
+    },
+    end: function end(tag) {
+      var node = stacks.shift();
+      if (node.name !== tag) console.error('invalid state: mismatch end tag');
+
+      if (stacks.length === 0) {
+        results.children.push(node);
+      } else {
+        var parent = stacks[0];
+
+        if (!parent.children) {
+          parent.children = [];
+        }
+
+        parent.children.push(node);
+      }
+    },
+    chars: function chars(text) {
+      var node = {
+        type: 'text',
+        text: text
+      };
+
+      if (stacks.length === 0) {
+        results.children.push(node);
+      } else {
+        var parent = stacks[0];
+
+        if (!parent.children) {
+          parent.children = [];
+        }
+
+        parent.children.push(node);
+      }
+    },
+    comment: function comment(text) {
+      var node = {
+        node: 'comment',
+        text: text
+      };
+      var parent = stacks[0];
+
+      if (!parent.children) {
+        parent.children = [];
+      }
+
+      parent.children.push(node);
+    }
+  });
+  return results.children;
+}
+
+export default parseHtml;