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1749 lines (1315 loc) · 45.8 KB
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// Table Widget: Format an array of RDF statements as an HTML table.
//
// This can operate in one of three modes: when the class of object is given
// or when the source document from whuch data is taken is given,
// or if a prepared query object is given.
// (In principle it could operate with neither class nor document
// given but typically
// there would be too much data.)
// When the tableClass is not given, it looks for common classes in the data,
// and gives the user the option.
//
// 2008 Written, Ilaria Liccardi as the tableViewPane.js
// 2014 Core table widget moved into common/table.js - timbl
//
var UI = {
icons: require('./iconBase'),
log: require('./log'),
ns: require('./ns'),
store: require('./store'),
utils: require('./utils'),
widgets: require('./widgets')
}
// UI.widgets.renderTableViewPane
module.exports = function renderTableViewPane (doc, options) {
var sourceDocument = options.sourceDocument
var tableClass = options.tableClass
var givenQuery = options.query
var RDFS_TYPE = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#type'
var RDFS_LITERAL = 'http://www.w3.org/2000/01/rdf-schema#Literal'
var ns = UI.ns
var kb = UI.store
var rowsLookup = {} // Persistent mapping of subject URI to dom TR
// Predicates that are never made into columns:
var FORBIDDEN_COLUMNS = {
'http://www.w3.org/2002/07/owl#sameAs': true,
'http://www.w3.org/1999/02/22-rdf-syntax-ns#type': true
}
// Number types defined in the XML schema:
var XSD_NUMBER_TYPES = {
'http://www.w3.org/2001/XMLSchema#decimal': true,
'http://www.w3.org/2001/XMLSchema#float': true,
'http://www.w3.org/2001/XMLSchema#double': true,
'http://www.w3.org/2001/XMLSchema#integer': true,
'http://www.w3.org/2001/XMLSchema#nonNegativeInteger': true,
'http://www.w3.org/2001/XMLSchema#positiveInteger': true,
'http://www.w3.org/2001/XMLSchema#nonPositiveInteger': true,
'http://www.w3.org/2001/XMLSchema#negativeInteger': true,
'http://www.w3.org/2001/XMLSchema#long': true,
'http://www.w3.org/2001/XMLSchema#int': true,
'http://www.w3.org/2001/XMLSchema#short': true,
'http://www.w3.org/2001/XMLSchema#byte': true,
'http://www.w3.org/2001/XMLSchema#unsignedLong': true,
'http://www.w3.org/2001/XMLSchema#unsignedInt': true,
'http://www.w3.org/2001/XMLSchema#unsignedShort': true,
'http://www.w3.org/2001/XMLSchema#unsignedByte': true
}
var XSD_DATE_TYPES = {
'http://www.w3.org/2001/XMLSchema#dateTime': true,
'http://www.w3.org/2001/XMLSchema#date': true
}
// Classes that indicate an image:
var IMAGE_TYPES = {
'http://xmlns.com/foaf/0.1/Image': true,
'http://purl.org/dc/terms/Image': true
}
// Name of the column used as a "key" value to look up the row.
// This is necessary because in the normal view, the columns are
// all "optional" values, meaning that we will get a result set
// for every individual value that is found. The row key acts
// as an anchor that can be used to combine this information
// back into the same row.
var keyVariable = options.keyVariable || '?_row'
var subjectIdCounter = 0
var allType, types
var typeSelectorDiv, addColumnDiv
// The last SPARQL query used:
var lastQuery = null
var mostCommonType = null
var resultDiv = doc.createElement('div')
resultDiv.className = 'tableViewPane'
resultDiv.appendChild(generateControlBar()) // sets typeSelectorDiv
var tableDiv = doc.createElement('div')
resultDiv.appendChild(tableDiv)
// Save a refresh function for use by caller
resultDiv.refresh = function () {
runQuery(table.query, table.logicalRows, table.columns, table)
// updateTable(givenQuery, mostCommonType) // This could be a lot more incremental and efficient
}
// A specifically asked-for query
if (givenQuery) {
var table = renderTableForQuery(givenQuery)
// lastQuery = givenQuery
tableDiv.appendChild(table)
} else {
// Find the most common type and select it by default
var s = calculateTable()
allType = s[0]; types = s[1]
if (!tableClass) typeSelectorDiv.appendChild(
generateTypeSelector(allType, types))
mostCommonType = getMostCommonType(types)
if (mostCommonType) {
buildFilteredTable(mostCommonType)
} else {
buildFilteredTable(allType)
}
}
return resultDiv
// /////////////////////////////////////////////////////////////////
function closeDialog (dialog) {
dialog.parentNode.removeChild(dialog)
}
function createActionButton (label, callback) {
var button = doc.createElement('input')
button.setAttribute('type', 'submit')
button.setAttribute('value', label)
button.addEventListener('click', callback, false)
return button
}
function createSparqlWindow () {
var dialog = doc.createElement('div')
dialog.setAttribute('class', 'sparqlDialog')
var title = doc.createElement('h3')
title.appendChild(doc.createTextNode('Edit SPARQL query'))
var inputbox = doc.createElement('textarea')
inputbox.value = queryToSPARQL(lastQuery)
dialog.appendChild(title)
dialog.appendChild(inputbox)
dialog.appendChild(createActionButton('Query', function () {
var query = SPARQLToQuery(inputbox.value)
updateTable(query)
closeDialog(dialog)
}))
dialog.appendChild(createActionButton('Close', function () {
closeDialog(dialog)
}))
return dialog
}
function sparqlButtonPressed () {
var dialog = createSparqlWindow()
resultDiv.appendChild(dialog)
}
function generateSparqlButton () {
var image = doc.createElement('img')
image.setAttribute('class', 'sparqlButton')
image.setAttribute('src', tabulator.iconPrefix + 'icons/1pt5a.gif')
image.setAttribute('alt', 'Edit SPARQL query')
image.addEventListener('click', sparqlButtonPressed, false)
return image
}
// Generate the control bar displayed at the top of the screen.
function generateControlBar () {
var result = doc.createElement('table')
result.setAttribute('class', 'toolbar')
var tr = doc.createElement('tr')
/* @@ Add in later -- not debugged yet
var sparqlButtonDiv = doc.createElement("td")
sparqlButtonDiv.appendChild(generateSparqlButton())
tr.appendChild(sparqlButtonDiv)
*/
typeSelectorDiv = doc.createElement('td')
tr.appendChild(typeSelectorDiv)
addColumnDiv = doc.createElement('td')
tr.appendChild(addColumnDiv)
result.appendChild(tr)
return result
}
// Add the SELECT details to the query being built.
function addSelectToQuery (query, type) {
var selectedColumns = type.getColumns()
for (var i = 0; i < selectedColumns.length; ++i) {
// TODO: autogenerate nicer names for variables
// variables have to be unambiguous
var variable = kb.variable('_col' + i)
query.vars.push(variable)
selectedColumns[i].setVariable(variable)
}
}
// Add WHERE details to the query being built.
function addWhereToQuery (query, rowVar, type) {
var queryType = type.type
if (!queryType) {
queryType = kb.variable('_any')
}
// _row a type
query.pat.add(rowVar,
UI.ns.rdf('type'),
queryType)
}
// Generate OPTIONAL column selectors.
function addColumnsToQuery (query, rowVar, type) {
var selectedColumns = type.getColumns()
for (var i = 0; i < selectedColumns.length; ++i) {
var column = selectedColumns[i]
var formula = kb.formula()
formula.add(rowVar,
column.predicate,
column.getVariable())
query.pat.optional.push(formula)
}
}
// Generate a query object from the currently-selected type
// object.
function generateQuery (type) {
var query = new tabulator.rdf.Query()
var rowVar = kb.variable(keyVariable.slice(1)); // don't pass '?'
addSelectToQuery(query, type)
addWhereToQuery(query, rowVar, type)
addColumnsToQuery(query, rowVar, type)
return query
}
// Build the contents of the tableDiv element, filtered according
// to the specified type.
function buildFilteredTable (type) {
// Generate "add column" cell.
clearElement(addColumnDiv)
addColumnDiv.appendChild(generateColumnAddDropdown(type))
var query = generateQuery(type)
updateTable(query, type)
}
function updateTable (query, type) {
// Stop the previous query from doing any updates.
if (lastQuery) {
lastQuery.running = false
}
// Render the HTML table.
var htmlTable = renderTableForQuery(query, type)
// Clear the tableDiv element, and replace with the new table.
clearElement(tableDiv)
tableDiv.appendChild(htmlTable)
// Save the query for the edit dialog.
lastQuery = query
}
// Remove all subelements of the specified element.
function clearElement (element) {
while (element.childNodes.length > 0) {
element.removeChild(element.childNodes[0])
}
}
// A SubjectType is created for each rdf:type discovered.
function SubjectType (type) {
this.type = type
this.columns = null
this.allColumns = null
this.useCount = 0
// Get a list of all columns used by this type.
this.getAllColumns = function () {
return this.allColumns
}
// Get a list of the current columns used by this type
// (subset of allColumns)
this.getColumns = function () {
// The first time through, get a list of all the columns
// and select only the six most popular columns.
if (!this.columns) {
var allColumns = this.getAllColumns()
this.columns = allColumns.slice(0, 7)
}
return this.columns
}
// Get a list of unused columns
this.getUnusedColumns = function () {
var allColumns = this.getAllColumns()
var columns = this.getColumns()
var result = []
for (var i = 0; i < allColumns.length; ++i) {
if (columns.indexOf(allColumns[i]) == -1) {
result.push(allColumns[i])
}
}
return result
}
this.addColumn = function (column) {
this.columns.push(column)
}
this.removeColumn = function (column) {
this.columns = this.columns.filter(function (x) {
return x !== column
})
}
this.getLabel = function () {
return UI.utils.label(this.type)
}
this.addUse = function () {
this.useCount += 1
}
}
// Class representing a column in the table.
function Column () {
this.useCount = 0
// Have we checked any values for this column yet?
this.checkedAnyValues = false
// If the range is unknown, but we just get literals in this
// column, then we can generate a literal selector.
this.possiblyLiteral = true
// If the range is unknown, but we just get literals and they
// match the regular expression for numbers, we can generate
// a number selector.
this.possiblyNumber = true
// We accumulate classes which things in the column must be a member of
this.constraints = []
// Check values as they are read. If we don't know what the
// range is, we might be able to infer that it is a literal
// if all of the values are literals. Similarly, we might
// be able to determine if the literal values are actually
// numbers (using regexps).
this.checkValue = function (term) {
var termType = term.termType
if (this.possiblyLiteral && termType !== 'Literal' && termType !== 'NamedNode') {
this.possiblyNumber = false
this.possiblyLiteral = false
} else if (this.possiblyNumber) {
if (termType != 'Literal') {
this.possiblyNumber = false
} else {
var literalValue = term.value
if (!literalValue.match(/^\-?\d+(\.\d*)?$/)) {
this.possiblyNumber = false
}
}
}
this.checkedAnyValues = true
}
this.getVariable = function () {
return this.variable
}
this.setVariable = function (variable) {
this.variable = variable
}
this.getKey = function () {
return this.variable.toString()
}
this.addUse = function () {
this.useCount += 1
}
this.getLabel = function () {
if (this.predicate) {
if (this.predicate.sameTerm(ns.rdf('type')) && this.superClass) {
return UI.utils.label(this.superClass)
}
return UI.utils.label(this.predicate)
} else if (this.variable) {
return this.variable.toString()
} else {
return 'unlabeled column?'
}
}
this.setPredicate = function (predicate, inverse, other) {
if (inverse) { // variable is in the subject pos
this.inverse = predicate
this.constraints = this.constraints.concat(
kb.each(predicate, UI.ns.rdfs('domain')))
if (predicate.sameTerm(ns.rdfs('subClassOf')) && (other.termType === 'NamedNode')) {
this.superClass = other
this.alternatives = kb.each(undefined, ns.rdfs('subClassOf'), other)
}
} else { // variable is the object
this.predicate = predicate
this.constraints = this.constraints.concat(kb.each(predicate, UI.ns.rdfs('range')))
}
}
this.getConstraints = function () {
return this.constraints
}
this.filterFunction = function () {
return true
}
this.sortKey = function () {
return this.getLabel().toLowerCase()
}
this.isImageColumn = function () {
for (var i = 0; i < this.constraints.length; i++)
if (this.constraints[i].uri in IMAGE_TYPES) return true
return false
}
}
// Convert an object to an array.
function objectToArray (obj, filter) {
var result = []
for (var property in obj) { // @@@ have to guard against methods
var value = obj[property]
if (!filter || filter(property, value)) {
result.push(value)
}
}
return result
}
// Get the list of valid columns from the columns object.
function getColumnsList (columns) {
return objectToArray(columns)
}
// Generate an <option> in a drop-down list.
function optionElement (label, value) {
var result = doc.createElement('option')
result.setAttribute('value', value)
result.appendChild(doc.createTextNode(label))
return result
}
// Generate drop-down list box for choosing type of data displayed
function generateTypeSelector (allType, types) {
var resultDiv = doc.createElement('div')
resultDiv.appendChild(doc.createTextNode('Select type: '))
var dropdown = doc.createElement('select')
dropdown.appendChild(optionElement('All types', 'null'))
for (var uri in types) {
dropdown.appendChild(optionElement(types[uri].getLabel(), uri))
}
dropdown.addEventListener('click', function () {
var type
if (dropdown.value === 'null') {
type = allType
} else {
type = types[dropdown.value]
}
typeSelectorChanged(type)
}, false)
resultDiv.appendChild(dropdown)
return resultDiv
}
// Callback invoked when the type selector drop-down list is changed.
function typeSelectorChanged (selectedType) {
buildFilteredTable(selectedType)
}
// Build drop-down list to add a new column
function generateColumnAddDropdown (type) {
var resultDiv = doc.createElement('div')
var unusedColumns = type.getUnusedColumns()
unusedColumns.sort(function (a, b) {
var aLabel = a.sortKey()
var bLabel = b.sortKey()
return (aLabel > bLabel) - (aLabel < bLabel)
})
// If there are no unused columns, the div is empty.
if (unusedColumns.length > 0) {
resultDiv.appendChild(doc.createTextNode('Add column: '))
// Build dropdown list of unused columns.
var dropdown = doc.createElement('select')
dropdown.appendChild(optionElement('', '-1'))
for (var i = 0; i < unusedColumns.length; ++i) {
var column = unusedColumns[i]
dropdown.appendChild(optionElement(column.getLabel(), '' + i))
}
resultDiv.appendChild(dropdown)
// Invoke callback when the dropdown is changed, to add
// the column and reload the table.
dropdown.addEventListener('click', function () {
var columnIndex = new Number(dropdown.value)
if (columnIndex >= 0) {
type.addColumn(unusedColumns[columnIndex])
buildFilteredTable(type)
}
}, false)
}
return resultDiv
}
// Find the column for a given predicate, creating a new column object
// if necessary.
function getColumnForPredicate (columns, predicate) {
var column
if (predicate.uri in columns) {
column = columns[predicate.uri]
} else {
column = new Column()
column.setPredicate(predicate)
columns[predicate.uri] = column
}
return column
}
// Find a type by its URI, creating a new SubjectType object if
// necessary.
function getTypeForObject (types, type) {
var subjectType
if (type.uri in types) {
subjectType = types[type.uri]
} else {
subjectType = new SubjectType(type)
types[type.uri] = subjectType
}
return subjectType
}
// Discover types and subjects for search.
function discoverTypes () {
// rdf:type properties of subjects, indexed by URI for the type.
var types = {}
// Get a list of statements that match: ? rdfs:type ?
// From this we can get a list of subjects and types.
var subjectList = kb.statementsMatching(undefined,
UI.ns.rdf('type'),
tableClass, // can be undefined OR
sourceDocument) // can be undefined
// Subjects for later lookup. This is a mapping of type URIs to
// lists of subjects (it is necessary to record the type of
// a subject).
var subjects = {}
for (var i = 0; i < subjectList.length; ++i) {
var type = subjectList[i].object
if (type.termType !== 'NamedNode') { // @@ no bnodes?
continue
}
var typeObj = getTypeForObject(types, type)
if (!(type.uri in subjects)) {
subjects[type.uri] = []
}
subjects[type.uri].push(subjectList[i].subject)
typeObj.addUse()
}
return [ subjects, types ]
}
// Get columns for the given subject.
function getSubjectProperties (subject, columns) {
// Get a list of properties of this subject.
var properties = kb.statementsMatching(subject,
undefined,
undefined,
sourceDocument)
var result = {}
for (var j = 0; j < properties.length; ++j) {
var predicate = properties[j].predicate
if (predicate.uri in FORBIDDEN_COLUMNS) {
continue
}
// Find/create a column for this predicate.
var column = getColumnForPredicate(columns, predicate)
column.checkValue(properties[j].object)
result[predicate.uri] = column
}
return result
}
// Identify the columns associated with a type.
function identifyColumnsForType (type, subjects) {
var allColumns = {}
// Process each subject of this type to build up the
// column list.
for (var i = 0; i < subjects.length; ++i) {
var columns = getSubjectProperties(subjects[i], allColumns)
for (var predicateUri in columns) {
var column = columns[predicateUri]
column.addUse()
}
}
// Generate the columns list
var allColumnsList = objectToArray(allColumns)
sortColumns(allColumnsList)
type.allColumns = allColumnsList
}
// Build table information from parsing RDF statements.
function calculateTable () {
// Find the types that we will display in the dropdown
// list box, and associated objects of those types.
var subjects, types
var s = discoverTypes()
subjects = s[0]; types = s[1]; // no [ ] on LHS
for (var typeUrl in subjects) {
var subjectList = subjects[typeUrl]
var type = types[typeUrl]
identifyColumnsForType(type, subjectList)
}
// TODO: Special type that captures all rows.
// Combine columns from all types
var allType = new SubjectType(null)
return [ allType, objectToArray(types) ]
}
// Sort the list of columns by the most common columns.
function sortColumns (columns) {
function sortFunction (a, b) {
return (a.useCount < b.useCount) - (a.useCount > b.useCount)
}
columns.sort(sortFunction)
}
// Create the delete button for a column.
function renderColumnDeleteButton (type, column) {
var button = doc.createElement('a')
button.appendChild(doc.createTextNode('[x]'))
button.addEventListener('click', function () {
type.removeColumn(column)
buildFilteredTable(type)
}, false)
return button
}
// Render the table header for the HTML table.
function renderTableHeader (columns, type) {
var tr = doc.createElement('tr')
/* Empty header for link column */
var linkTd = doc.createElement('th')
tr.appendChild(linkTd)
/*
var labelTd = doc.createElement("th")
labelTd.appendChild(doc.createTextNode("*label*"))
tr.appendChild(labelTd)
*/
for (var i = 0; i < columns.length; ++i) {
var th = doc.createElement('th')
var column = columns[i]
th.appendChild(doc.createTextNode(column.getLabel()))
// We can only add a delete button if we are using the
// proper interface and have a type to delete from:
if (type) {
th.appendChild(renderColumnDeleteButton(type, column))
}
tr.appendChild(th)
}
return tr
}
// Sort the rows in the rendered table by data from a specific
// column, using the provided sort function to compare values.
function applyColumnSort (rows, column, sortFunction, reverse) {
var columnKey = column.getKey()
// Sort the rows array.
rows.sort(function (row1, row2) {
var row1Value = null, row2Value = null
if (columnKey in row1.values) {
row1Value = row1.values[columnKey][0]
}
if (columnKey in row2.values) {
row2Value = row2.values[columnKey][0]
}
var result = sortFunction(row1Value, row2Value)
if (reverse) {
return -result
} else {
return result
}
})
// Remove all rows from the table:
if (rows.length) {
var parentTable = rows[0]._htmlRow.parentNode
for (var i = 0; i < rows.length; ++i) {
parentTable.removeChild(rows[i]._htmlRow)
}
// Add back the rows in the new sorted order:
for (var i = 0; i < rows.length; ++i) {
parentTable.appendChild(rows[i]._htmlRow)
}
}
}
// Filter the list of rows based on the selectors for the
// columns.
function applyColumnFiltersToRow (row, columns) {
var rowDisplayed = true
// Check the filter functions for every column.
// The row should only be displayed if the filter functions
// for all of the columns return true.
for (var c = 0; c < columns.length; ++c) {
var column = columns[c]
var columnKey = column.getKey()
var columnValue = null
if (columnKey in row.values) {
columnValue = row.values[columnKey][0]
}
if (!column.filterFunction(columnValue)) {
rowDisplayed = false
break
}
}
// Show or hide the HTML row according to the result
// from the filter function.
var htmlRow = row._htmlRow
if (rowDisplayed) {
htmlRow.style.display = ''
} else {
htmlRow.style.display = 'none'
}
}
// Filter the list of rows based on the selectors for the
// columns.
function applyColumnFilters (rows, columns) {
// Apply filterFunction to each row.
for (var r = 0; r < rows.length; ++r) {
var row = rows[r]
applyColumnFiltersToRow(row, columns)
}
}
// /////////////////////////////////// Literal column handling
// Sort by literal value
function literalSort (rows, column, reverse) {
function literalToString (colValue) {
if (colValue) {
if (colValue.termType === 'Literal') {
return colValue.value.toLowerCase()
} else if (colValue.termType === 'NamedNode') {
return UI.utils.label(colValue).toLowerCase()
}
return colValue.value.toLowerCase()
} else {
return ''
}
}
function literalCompare (value1, value2) {
var strValue1 = literalToString(value1)
var strValue2 = literalToString(value2)
if (strValue1 < strValue2) {
return -1
} else if (strValue1 > strValue2) {
return 1
} else {
return 0
}
}
applyColumnSort(rows, column, literalCompare, reverse)
}
// Generates a selector for an RDF literal column.
function renderLiteralSelector (rows, columns, column) {
var result = doc.createElement('div')
var textBox = doc.createElement('input')
textBox.setAttribute('type', 'text')
textBox.style.width = '70%'
result.appendChild(textBox)
var sort1 = doc.createElement('span')
sort1.appendChild(doc.createTextNode('\u25BC'))
sort1.addEventListener('click', function () {
literalSort(rows, column, false)
}, false)
result.appendChild(sort1)
var sort2 = doc.createElement('span')
sort2.appendChild(doc.createTextNode('\u25B2'))
sort2.addEventListener('click', function () {
literalSort(rows, column, true)
}, false)
result.appendChild(sort2)
var substring = null
// Filter the table to show only rows that have a particular
// substring in the specified column.
column.filterFunction = function (colValue) {
if (!substring) {
return true
} else if (!colValue) {
return false
} else {
var literalValue