/[jsFind]/trunk/html/js/search.js
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 1 by dpavlin, Sun Jul 11 20:18:25 2004 UTC revision 31 by dpavlin, Sun Oct 10 04:53:22 2004 UTC
# Line 33  var conversion = new String Line 33  var conversion = new String
33  var query_left = "";  var query_left = "";
34  var search_err = "";  var search_err = "";
35  var results    = null;  var results    = null;
36    var index_path = "";
37    
38  var watchdog_id = 0;  var watchdog_id = 0;
39  var watchdog_callback = null;  var watchdog_callback = null;
# Line 78  function intersect_results(data) Line 79  function intersect_results(data)
79   From David Flanagan's, _Javascript:_The Definitive_Guide_, pg. 294-5,   From David Flanagan's, _Javascript:_The Definitive_Guide_, pg. 294-5,
80    published by O'Reilly, 4th edition, 2002    published by O'Reilly, 4th edition, 2002
81  */  */
82    
83    var debug_div = null;
84    
85  function debug(msg)  function debug(msg)
86  {  {
87  //  return; // Disable debugging  //  return; // Disable debugging
88    
89    if(!debug.box)    if (! debug_div) debug_div = document.getElementById('debug');
   {  
     debug.box = document.createElement("div");  
     debug.box.setAttribute("style",  
                            "background-color:white" +  
                            "font-family: monospace; " +  
                            "border: solid black 3px; "+  
                            "padding: 10px;");  
   
     document.body.appendChild(debug.box);  
     debug.box.innerHTML = "<h1 style='test-align:cent'>Debugging Output</h1>";  
   }  
   
   var p = document.createElement("p");  
   p.appendChild(document.createTextNode(msg));  
   debug.box.appendChild(p);  
 }  
90    
91  //    // this will create debug div if it doesn't exist.
92      if (! debug_div) {
93            debug_div = document.createElement('div');
94            document.body.appendChild(debug_div);
95      }
96      if (debug_div) {
97            debug_div.appendChild(document.createTextNode(msg));
98            debug_div.appendChild(document.createElement("br"));
99      }
100    }
101    
102  // Convert a number into a base 62 alphanumeric number string  // Convert a number into a base 62 alphanumeric number string
103  function convert(num)  function convert(num)
# Line 132  function watchdog() Line 129  function watchdog()
129    watchdog_callback(new Array());    watchdog_callback(new Array());
130  }  }
131    
132    var xmldoc;
133    
134  // This function loads the XML document from the specified URL, and when  // This function loads the XML document from the specified URL, and when
135  // it is fully loaded, passes that document and the url to the specified  // it is fully loaded, passes that document and the url to the specified
136  // handler function.  This function works with any XML document  // handler function.  This function works with any XML document
# Line 151  function loadXML(url, handler, data, res Line 150  function loadXML(url, handler, data, res
150      if (document.implementation && document.implementation.createDocument)      if (document.implementation && document.implementation.createDocument)
151      {      {
152       // Create a new Document object       // Create a new Document object
153        var xmldoc = document.implementation.createDocument("", "", null);        xmldoc = document.implementation.createDocument("", "", null);
154    
155        // Specify what should happen when it finishes loading        // Specify what should happen when it finishes loading
156        xmldoc.onload = function() { handler(xmldoc, url, data, result_handler); }        xmldoc.onload = function() { handler(xmldoc, url, data, result_handler); }
# Line 161  function loadXML(url, handler, data, res Line 160  function loadXML(url, handler, data, res
160    
161        // And tell it what URL to load        // And tell it what URL to load
162        xmldoc.load(url);        xmldoc.load(url);
163          return true;
164      }      }
165      // Otherwise use Microsoft's proprietary API for Internet Explorer      // Otherwise use Microsoft's proprietary API for Internet Explorer
166      // Something about not following standards once again      // Something about not following standards once again
167      else if (window.ActiveXObject)      else if (window.ActiveXObject)
168      {        {  
169        //var xmldoc = new ActiveXObject("MSXML2.DOMDocument");   // Create doc.        xmldoc = new ActiveXObject("Microsoft.XMLDOM");   // Create doc.
170        var xmldoc = new ActiveXObject("Microsoft.XMLDOM");   // Create doc.        if (! xmldoc) xmldoc = new ActiveXObject("MSXML2.DOMDocument");   // Create doc.
171        // Specify onload        // Specify onload
172        xmldoc.onreadystatechange = function()        xmldoc.onreadystatechange = function()
173        {                      {              
174          if (xmldoc.readyState == 4) handler(xmldoc, url, data, result_handler);          if (xmldoc.readyState == 4) handler(xmldoc, url, data, result_handler);
175        }        }
176        xmldoc.load(url);                                     // Start loading!        xmldoc.load(url);                                     // Start loading!
177          return true;
178      }      }
179        // else fallback on usage of iframes to load xml (Opera 7.53 without Java and maybe old Mac browsers)
180        else {
181          debug("using iframe xml loader - experimental and slow");
182          if (! window.xml_iframe) {
183            debug("creating iframe");
184            window.xml_iframe = document.createElement('div');
185            window.xml_iframe.innerHTML = '<iframe src="'+url+'" name="xml_iframe" height="0" width="0" style="display: none;"></iframe>';
186            document.body.appendChild(window.xml_iframe);
187          } else {
188            debug("loading xml in existing iframe");
189            window.frames.xml_iframe.window.document.location.href = url;
190          }
191    
192          // set timeout to re-check if iframe is loaded
193          window.iframe_timeout = window.setInterval('iframe_xml_loaded();',100);
194    
195          // save some data for iframe_xml_loaded()
196          window.xml_handler = handler;
197          window.xml_url = url;
198          window.xml_data = data;
199          window.xml_result_handler = result_handler;
200          return true;
201        }
202        clearTimeout(watchdog_id);
203        debug("Browser incompatilibity: can't request XML document by one of supported methods");
204        return false;
205    }    }
206    catch(ex)    catch(ex)
207    {    {
# Line 188  function loadXML(url, handler, data, res Line 215  function loadXML(url, handler, data, res
215    return true;    return true;
216  }  }
217    
218    function iframe_xml_loaded() {
219      debug("iframe_xmldoc_loaded");
220      if (! window.frames['xml_iframe']) return;
221      var xml = eval('window.frames.xml_iframe.window.document');
222      if (xml) {
223            clearTimeout(window.iframe_timeout);
224            debug("calling handler with ("+window.xml_url+","+window.xml_data+",...)");
225            window.xml_handler(window.frames.xml_iframe.window.document, window.xml_url, window.xml_data, window.xml_result_handler);
226      } else {
227            debug("can't eval iframe with xml");
228      }
229    }
230    
231  function loadData(xmldoc, url, pos, result_handler)  function loadData(xmldoc, url, pos, result_handler)
232  {  {
233    clearTimeout(watchdog_id);    clearTimeout(watchdog_id);
# Line 217  function loadData(xmldoc, url, pos, resu Line 257  function loadData(xmldoc, url, pos, resu
257    
258      if(query_left.length > 0)      if(query_left.length > 0)
259      {      {
260        doSearch(query_left, result_handler);          doSearch(index_path, query_left, result_handler);  
261      }      }
262      else      else
263      {      {
# Line 262  function traverseTree(xmldoc, url, query Line 302  function traverseTree(xmldoc, url, query
302                        traverseTree,query,result_handler))                        traverseTree,query,result_handler))
303            {            {
304              debug("Unable to locate key "+query);              debug("Unable to locate key "+query);
305                result_handler(new Array());
306            }            }
307            // make sure of garbage collection            // make sure of garbage collection
308            xmldoc=null;            xmldoc=null;
# Line 275  function traverseTree(xmldoc, url, query Line 316  function traverseTree(xmldoc, url, query
316                      loadData, i, result_handler))                      loadData, i, result_handler))
317          {          {
318            debug("ERROR: Unable to locate data "+query);            debug("ERROR: Unable to locate data "+query);
319              result_handler(new Array());
320          }          }
321          // make sure of garbage collection          // make sure of garbage collection
322          xmldoc=null;          xmldoc=null;
# Line 283  function traverseTree(xmldoc, url, query Line 325  function traverseTree(xmldoc, url, query
325      }      }
326    }    }
327    // Look past the end...    // Look past the end...
328    if(!loadXML(url.replace(".xml","/"+convert(i)+".xml"),    if(keys.length == 0 || !loadXML(url.replace(".xml","/"+convert(i)+".xml"),
329                traverseTree,query,result_handler))                traverseTree,query,result_handler))
330    {    {
331      debug("Unable to locate key "+query);      debug("Unable to locate key "+query);
332        result_handler(new Array());
333    }    }
334    // make sure of garbage collection    // make sure of garbage collection
335    xmldoc=null;    xmldoc=null;
336    return;    return;
337  }  }
338    
339  function doSearch(query, result_func)  function doSearch(index_name,query, result_func)
340  {  {
341    //alert("doSearch("+query+")");    //alert("doSearch("+index_name+","+query+")");
342    var pos=query.search(/[\s\+]/);    var pos=query.search(/[\s\+]/);
343      if (index_name) index_path = index_name+'/';
344    
345    if(pos < 0)    if(pos < 0)
346    {    {
# Line 308  function doSearch(query, result_func) Line 352  function doSearch(query, result_func)
352      query = query.slice(0,pos);      query = query.slice(0,pos);
353    }    }
354    
355    if(!loadXML("0.xml", traverseTree, query.toLowerCase(), result_func))    if(!loadXML(index_path+"0.xml", traverseTree, query.toLowerCase(), result_func))
356    {    {
357      debug("ERROR: Couldn't find main index 0.xml");      debug("ERROR: Couldn't find main index 0.xml");
358      search_err = "INTERNAL ERROR: Unable to load main index 0.xml";      search_err = "INTERNAL ERROR: Unable to load main index 0.xml";
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