chrome.content.rtc.js Maven / Gradle / Ivy
/**
* Javascript file for page processing for firefox plugin
*
* @author Fuqi Song, wimmics INRIA - I3S
* @date March 2014
*/
//** global variables **
var graph;
var triplesNo = 0, queryResultsNo = 0;
var graphName;
var json;
var c = {
'TABLE_TRIPLES': 'rtc-extracted-triples',
'TABLE_RESULTS': 'rtc-query-results',
'TREE_CELL': 'treecell',
'TREE_ROW': 'treerow',
'TREE_ITEM': 'treeitem',
'TREE_COLS': 'treecols',
'TREE_COL': 'treecol',
'LABEL': 'label',
'FLEX': 'flex'
}
;
// when loading the document, extract the triples
window.addEventListener("load", function load(event) {
window.removeEventListener("load", load, false); //remove listener, no longer needed
myExtension.init();
hideExt(true);
}, false);
// when switching the tabs, reload the document and re-extract triples
gBrowser.tabContainer.addEventListener("TabSelect", function reload(event) {
loadTriples(gBrowser.contentDocument);
}, false);
var myExtension = {
init: function() {
// The event can be DOMContentLoaded, pageshow, pagehide, load or unload.
if (gBrowser)
gBrowser.addEventListener("DOMContentLoaded", this.onPageLoad, false);
},
onPageLoad: function(aEvent) {
var doc = aEvent.originalTarget; // doc is document that triggered the event
loadTriples(doc);
}
};
//show a message on the top bar
function showMsg(msg, alt) {
$(("#rtc-info")).val('* message: ' + msg);
if (alt)
alert(msg);
}
//Load triples from page and display in tables
function loadTriples(doc) {
graphName = doc.location.href;
//** 2. RDFa parser
GreenTurtle.attach(doc);
graph = doc.data.graph;
var subjs = graph.subjects;
triplesNo = graph.tripleCount;
// if triples deteced, then show icon in url bar
$('#url-bar-start').attr('hidden', triplesNo === 0);
//** 1. initialize
clear();
showMsg(triplesNo + ' triples found on "' + doc.title + '": [' + doc.location.href + ']', false);
//** 3. variables
var table = document.getElementById('rtc-extracted-triples-rows');
//var table = $('#'+c.TABLE_TRIPLES+' treechildren');
var i = 0;
//** 4 read s, p, o and add to table
for (var s in subjs) {
//***2 subject
var snode = subjs[s];
for (var p in snode.predicates) {
//****3 predicate
var pnode = snode.predicates[p];
for (var o in pnode.objects) {
//*** object
var onode = pnode.objects[o];
i++;
//create row/cell
var item = document.createElement(c.TREE_ITEM);
var row = document.createElement(c.TREE_ROW);
var rid = c.TABLE_TRIPLES + '-' + i;
row.setAttribute('id', rid);
addCell(row, c.TREE_CELL, c.LABEL, i);//id
addCell(row, c.TREE_CELL, c.LABEL, snode.id);//subject
addCell(row, c.TREE_CELL, c.LABEL, pnode.id);//predicate
var lang = onode.language === null || typeof onode.language === "undefined" ? '' : '@' + onode.language;
addCell(row, c.TREE_CELL, c.LABEL, onode.value + lang);//object
item.appendChild(row);
table.appendChild(item);
}
}
}
}
;
//add one cell to a row in a table
function addCell(parent, name, attr, value, flex) {
var cell = document.createElement(name);
if (attr !== null) {
cell.setAttribute(attr, value);
}
if (flex) {
cell.setAttribute('flex', flex);
}
parent.appendChild(cell);
}
;
//Display the details of one triples
function showDetails(table) {
var view = table.view;
var row = view.getItemAtIndex(view.selection.currentIndex);
var rs = row.getElementsByTagName(c.TREE_CELL);
var detail = '';
$("#" + table.getAttribute('id') + ' ' + c.TREE_COL).each(function(index, item) {
detail += item.getAttribute(c.LABEL) + ":\t" + rs[index].getAttribute(c.LABEL) + "\n";
});
$("#rtc-triple-detail").val(detail);
}
;
//Clear tables and some text fields when loading pages
function clear() {
$('treeitem').remove();
$("#rtc-triple-detail").val('');
$("#rtc-info").val('');
}
;
//download triples into a file on disk in format .ttl
//action = 1, download extracted triples in turtle
//action = 2, download query results in json
function download(action) {
var filter, textToDownload, defaultName;
//*0 check
if (action === 1) {
if (triplesNo === 0) {
showMsg('No triples to download!', true);
return;
} else {
filter = "*.ttl";
defaultName = "triples" + filter;
textToDownload = graph.toString();
}
}
if (action === 2) {
if (queryResultsNo === 0)
{
showMsg('No query results to download!', true);
return;
} else {
filter = ".json";
defaultName = "query" + filter;
textToDownload = json;
}
}
//*1 open file choose dialog
var nsIFilePicker = Components.interfaces.nsIFilePicker;
var fp = Components.classes["@mozilla.org/filepicker;1"].createInstance(nsIFilePicker);
fp.init(window, "Select a File", nsIFilePicker.modeSave);
fp.appendFilter(filter, filter);
fp.defaultString = defaultName;
var res = fp.show();
if (res !== nsIFilePicker.returnCancel) {
//*2 initialize the file
var filePath = fp.file.path;
var file = Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);
file.initWithPath(filePath);
if (file.exists() === false) {
file.create(Components.interfaces.nsIFile.NORMAL_FILE_TYPE, 420);
}
//*3 initialize the stream
var foStream = Components.classes["@mozilla.org/network/file-output-stream;1"]
.createInstance(Components.interfaces.nsIFileOutputStream);
foStream.init(file, 0x02 | 0x08 | 0x20, 0666, 0);
var converter = Components.classes["@mozilla.org/intl/converter-output-stream;1"].createInstance(Components.interfaces.nsIConverterOutputStream);
converter.init(foStream, "UTF-8", 0, 0);
converter.writeString(textToDownload);
converter.close();
//*4 alert
showMsg('File saved to ' + filePath, true);
}
}
;
var insert;
function upload() {
if (triplesNo === 0) {
showMsg('no triples to upload', true);
return;
}
//** process url
var url = $("#rtc-server-address").val();
if ($.trim(url).length < 1) {
showMsg('Please input the server address!', true);
}
//graph.toString return the triples in turtle format
var sGraph = graph.toString();
if ($('#radio-ldp').is(':selected')) {
url += "/ldp/upload";
sGraph = graph.toString({}, true);
} else {
url += "/sparql/update";
}
insert = 'INSERT DATA { GRAPH <' + graphName + '> {' + sGraph + ' } }';
$.ajax({
type: 'POST',
headers: {
Accept: "application/x-www-form-urlencoded"
},
url: url,
data: {'update': insert},
// dataType: "json",
crossDomain: true,
success: function() {
var msg = '* ' + triplesNo + ' triples uploaded successfully! [' + url + ']';
showMsg(msg, true);
},
error: function(jqXHR, textStatus, errorThrown) {
showMsg("Upload triples failure: " + textStatus, true);
console.log(errorThrown);
console.log(jqXHR);
}
});
}
;
//Execute sparql statement and return results
function query() {
//** 1 url process
var url = $("#rtc-server-address").val() + "/sparql";
if ($.trim(url).length < 1) {
showMsg('Please input the server address!', true);
}
//** 2 process spqral
var sparql = $.trim($("#rtc-sparql").val());
sparql = filter(sparql);
if (sparql === 0) {
return;
}
$('#' + c.TABLE_RESULTS + ' treeitem').remove();
//** 3 send request and receive response
$.ajax({
type: 'GET',
headers: {
Accept: "application/sparql-results+json"
},
url: url,
data: {'query': sparql},
dataType: "json",
crossDomain: true,
success: function(data) {
fillList(data);
json = JSON.stringify(data);
},
error: function(jqXHR, textStatus, errorThrown) {
showMsg("SPARQL querying failure: " + textStatus, true);
console.log(errorThrown);
console.log(jqXHR);
}
});
}
;
//fill the table using return data
function fillList(data) {
// JAX-RS serializes an empty list as null, and a 'collection of one' as an object (not an 'array of one')
var listVal = data.results.bindings == null ? [] : (data.results.bindings instanceof Array ? data.results.bindings : [data.results.bindings]);
var listVar = data.head.vars == null ? [] : (data.head.vars instanceof Array ? data.head.vars : [data.head.vars]);
queryResultsNo = data.results.bindings.length;
//** tree sturcture**
// tree
// -treecols
// -treecol
// -treechildern
// -treeitem
// -treerow
// -treecell
if (queryResultsNo > 0) {
$('#' + c.TABLE_RESULTS).empty();
//**** 1 process header of table *****
//Rendering the headers
var head = document.createElement(c.TREE_COLS);
//first column
var first = document.createElement(c.TREE_COL);
first.setAttribute(c.LABEL, '#');
first.setAttribute('width', '30px');
head.appendChild(first);
$.each(listVar, function(index, item) {
addCell(head, c.TREE_COL, c.LABEL, item, 1);
addCell(head, 'splitter', 'class', 'tree-splitter');
});
//add header and cols to table
$('#' + c.TABLE_RESULTS).append(head);
var treechildren = document.createElement('treechildren');
//Rendering the values
//**** 2 process data of table *****
$.each(listVal, function(index, item) {
var treeItem = document.createElement(c.TREE_ITEM);
var row = document.createElement(c.TREE_ROW);
row.setAttribute('id', c.TABLE_RESULTS + '-' + (index + 1));
addCell(row, c.TREE_CELL, c.LABEL, index + 1);
for (var i = 0; i < listVar.length; i++) {
var v = listVar[i];
if (item.hasOwnProperty(v)) {
addCell(row, c.TREE_CELL, c.LABEL, item[v].value);
} else {
addCell(row, c.TREE_CELL, null, null);
}
}
treeItem.appendChild(row);
treechildren.appendChild(treeItem);
});
$('#' + c.TABLE_RESULTS).append(treechildren);
}
showMsg(queryResultsNo + ' result(s) queried from server.', false);
}
;
// chgeck and re-write sparql statement
function filter(sparql) {
if (sparql.length < 1) {
showMsg('Please input sparql statement!', true);
return 0;
}
var index = sparql.toLowerCase().indexOf('from');
if (index !== -1) {
showMsg("Please don't specify the clause!", true);
return 0;
} else {
if ($('#radio-onthispage').is(':selected')) {
var from = '\nFROM <' + graphName + '> \n';
var wi = sparql.indexOf('where');
if (wi !== -1) {
return sparql.slice(0, wi) + from + sparql.slice(wi, sparql.length);
} else {
showMsg('Please check the sparql statement, there is no clause', true);
return 0;
}
} else {
return sparql;
}
}
}
;
//Hide panel of extension
//state:true, hide; state:false, show
function hideExt(state) {
$('#toolbar-id').attr('hidden', state);
$('#main-content-id').attr('hidden', state);
}
; © 2015 - 2024 Weber Informatics LLC | Privacy Policy