import from xapian 0.8.5
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dockes
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/* myhtmlparse.cc: subclass of HtmlParser for extracting text
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*
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* ----START-LICENCE----
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* Copyright 1999,2000,2001 BrightStation PLC
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* Copyright 2002,2003,2004 Olly Betts
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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* -----END-LICENCE-----
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*/
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#include "myhtmlparse.h"
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#include "indextext.h" // for lowercase_term()
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void
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MyHtmlParser::process_text(const string &text)
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{
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if (!in_script_tag && !in_style_tag) {
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string::size_type b = 0;
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while ((b = text.find_first_not_of(WHITESPACE, b)) != string::npos) {
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if (pending_space || b != 0)
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if (!dump.empty()) dump += ' ';
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pending_space = true;
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string::size_type e = text.find_first_of(WHITESPACE, b);
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if (e == string::npos) {
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dump += text.substr(b);
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pending_space = false;
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break;
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}
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dump += text.substr(b, e - b);
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b = e + 1;
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}
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}
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}
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void
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MyHtmlParser::opening_tag(const string &tag, const map<string,string> &p)
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{
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#if 0
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cout << "<" << tag;
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map<string, string>::const_iterator x;
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for (x = p.begin(); x != p.end(); x++) {
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cout << " " << x->first << "=\"" << x->second << "\"";
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}
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cout << ">\n";
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#endif
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if (tag.empty()) return;
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switch (tag[0]) {
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case 'a':
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if (tag == "address") pending_space = true;
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break;
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case 'b':
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if (tag == "body") {
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dump = "";
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break;
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}
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if (tag == "blockquote" || tag == "br") pending_space = true;
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break;
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case 'c':
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if (tag == "center") pending_space = true;
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break;
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case 'd':
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if (tag == "dd" || tag == "dir" || tag == "div" || tag == "dl" ||
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tag == "dt") pending_space = true;
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break;
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case 'e':
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if (tag == "embed") pending_space = true;
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break;
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case 'f':
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if (tag == "fieldset" || tag == "form") pending_space = true;
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break;
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case 'h':
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// hr, and h1, ..., h6
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if (tag.length() == 2 && strchr("r123456", tag[1]))
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pending_space = true;
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break;
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case 'i':
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if (tag == "iframe" || tag == "img" || tag == "isindex" ||
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tag == "input") pending_space = true;
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break;
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case 'k':
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if (tag == "keygen") pending_space = true;
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break;
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case 'l':
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if (tag == "legend" || tag == "li" || tag == "listing")
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pending_space = true;
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break;
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case 'm':
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if (tag == "meta") {
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map<string, string>::const_iterator i, j;
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if ((i = p.find("content")) != p.end()) {
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if ((j = p.find("name")) != p.end()) {
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string name = j->second;
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lowercase_term(name);
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if (name == "description") {
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if (sample.empty()) {
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sample = i->second;
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decode_entities(sample);
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}
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} else if (name == "keywords") {
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if (!keywords.empty()) keywords += ' ';
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string tmp = i->second;
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decode_entities(tmp);
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keywords += tmp;
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} else if (name == "robots") {
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string val = i->second;
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decode_entities(val);
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lowercase_term(val);
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if (val.find("none") != string::npos ||
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val.find("noindex") != string::npos) {
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indexing_allowed = false;
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throw true;
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}
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}
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}
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}
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break;
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}
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if (tag == "marquee" || tag == "menu" || tag == "multicol")
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pending_space = true;
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break;
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case 'o':
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if (tag == "ol" || tag == "option") pending_space = true;
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break;
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case 'p':
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if (tag == "p" || tag == "pre" || tag == "plaintext")
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pending_space = true;
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break;
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case 'q':
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if (tag == "q") pending_space = true;
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break;
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case 's':
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if (tag == "style") {
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in_style_tag = true;
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break;
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}
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if (tag == "script") {
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in_script_tag = true;
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break;
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}
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if (tag == "select") pending_space = true;
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break;
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case 't':
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if (tag == "table" || tag == "td" || tag == "textarea" ||
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tag == "th") pending_space = true;
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break;
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case 'u':
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if (tag == "ul") pending_space = true;
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break;
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case 'x':
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if (tag == "xmp") pending_space = true;
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break;
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}
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}
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void
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MyHtmlParser::closing_tag(const string &tag)
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{
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if (tag.empty()) return;
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switch (tag[0]) {
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case 'a':
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if (tag == "address") pending_space = true;
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break;
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case 'b':
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if (tag == "body") {
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throw true;
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}
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if (tag == "blockquote" || tag == "br") pending_space = true;
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break;
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case 'c':
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if (tag == "center") pending_space = true;
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break;
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case 'd':
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if (tag == "dd" || tag == "dir" || tag == "div" || tag == "dl" ||
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tag == "dt") pending_space = true;
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break;
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case 'f':
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if (tag == "fieldset" || tag == "form") pending_space = true;
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break;
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case 'h':
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// hr, and h1, ..., h6
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if (tag.length() == 2 && strchr("r123456", tag[1]))
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pending_space = true;
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break;
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case 'i':
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if (tag == "iframe") pending_space = true;
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break;
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case 'l':
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if (tag == "legend" || tag == "li" || tag == "listing")
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pending_space = true;
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break;
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case 'm':
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if (tag == "marquee" || tag == "menu") pending_space = true;
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break;
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case 'o':
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if (tag == "ol" || tag == "option") pending_space = true;
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break;
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case 'p':
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if (tag == "p" || tag == "pre") pending_space = true;
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break;
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case 'q':
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if (tag == "q") pending_space = true;
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break;
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case 's':
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if (tag == "style") {
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in_style_tag = false;
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break;
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}
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if (tag == "script") {
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in_script_tag = false;
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break;
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}
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if (tag == "select") pending_space = true;
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break;
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case 't':
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if (tag == "title") {
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if (title.empty()) {
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title = dump;
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dump = "";
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}
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break;
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}
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if (tag == "table" || tag == "td" || tag == "textarea" ||
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tag == "th") pending_space = true;
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break;
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case 'u':
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if (tag == "ul") pending_space = true;
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break;
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case 'x':
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if (tag == "xmp") pending_space = true;
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break;
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}
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}
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@ -0,0 +1,47 @@
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=======
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/* myhtmlparse.h: subclass of HtmlParser for extracting text
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*
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* ----START-LICENCE----
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* Copyright 1999,2000,2001 BrightStation PLC
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* Copyright 2002,2003,2004 Olly Betts
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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* -----END-LICENCE-----
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*/
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#include "htmlparse.h"
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// FIXME: Should we include \xa0 which is non-breaking space in iso-8859-1, but
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// not in all charsets and perhaps spans of all \xa0 should become a single
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// \xa0?
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#define WHITESPACE " \t\n\r"
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class MyHtmlParser : public HtmlParser {
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public:
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bool in_script_tag;
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bool in_style_tag;
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bool pending_space;
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string title, sample, keywords, dump;
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bool indexing_allowed;
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void process_text(const string &text);
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void opening_tag(const string &tag, const map<string,string> &p);
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void closing_tag(const string &tag);
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MyHtmlParser() :
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in_script_tag(false),
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in_style_tag(false),
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pending_space(false),
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indexing_allowed(true) { }
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};
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