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render.go
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render.go
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package main
import (
"html"
"io"
"sort"
"strconv"
"strings"
"time"
rdf "github.com/iand/gordf"
)
var DateLayouts = []string{
time.RFC3339,
"2006-01-02",
}
type RenderFunc func(w io.StringWriter, c *Context, inline bool, brief bool, level int)
var PreferredPropertyOrder = map[rdf.Term]int{
rdf.IRI("http://www.w3.org/2004/02/skos/core#prefLabel"): 95,
rdf.IRI("http://www.w3.org/2000/01/rdf-schema#label"): 90,
rdf.IRI("http://purl.org/dc/terms/title"): 85,
rdf.IRI("http://purl.org/dc/elements/1.1/title"): 80,
rdf.IRI("http://xmlns.com/foaf/0.1/name"): 75,
rdf.IRI("http://www.w3.org/2004/02/skos/core#definition"): 70,
rdf.IRI("http://open.vocab.org/terms/subtitle"): 65,
rdf.IRI("http://www.w3.org/2000/01/rdf-schema#comment"): 60,
rdf.IRI("http://purl.org/dc/terms/description"): 55,
rdf.IRI("http://purl.org/dc/elements/1.1/description"): 50,
rdf.IRI("http://purl.org/vocab/bio/0.1/olb"): 45,
rdf.IRI("http://www.w3.org/1999/02/22-rdf-syntax-ns#type"): 40,
rdf.IRI("http://purl.org/dc/terms/creator"): 35,
rdf.IRI("http://purl.org/dc/terms/contributor"): 30,
rdf.IRI("http://purl.org/dc/terms/publisher"): 25,
rdf.IRI("http://xmlns.com/foaf/0.1/depiction"): 20,
rdf.IRI("http://xmlns.com/foaf/0.1/img"): 15,
rdf.IRI("http://purl.org/dc/terms/subject"): 10,
rdf.IRI("http://purl.org/dc/terms/identifier"): 5,
}
var ImageProperties = map[rdf.Term]bool{
rdf.IRI("http://xmlns.com/foaf/0.1/depiction"): true,
rdf.IRI("http://xmlns.com/foaf/0.1/img"): true,
rdf.IRI("http://xmlns.com/foaf/0.1/logo"): true,
}
var CreatorProperties = []rdf.Term{
rdf.IRI("http://purl.org/dc/elements/1.1/creator"),
rdf.IRI("http://purl.org/dc/terms/creator"),
rdf.IRI("http://xmlns.com/foaf/0.1/maker"),
}
var ContributorProperties = []rdf.Term{
rdf.IRI("http://purl.org/dc/elements/1.1/contributor"),
rdf.IRI("http://purl.org/dc/terms/contributor"),
}
var SourceProperties = []rdf.Term{
rdf.IRI("http://purl.org/dc/elements/1.1/source"),
rdf.IRI("http://purl.org/dc/terms/source"),
}
type TypeRenderer struct {
Type rdf.Term
Renderer RenderFunc
}
func render(w io.StringWriter, c *Context, inline bool, brief bool, level int) {
if rdf.IsLiteral(c.Term) {
renderLiteral(w, c, inline, brief)
return
}
Renderers := []TypeRenderer{
{Type: rdf.IRI("http://www.w3.org/1999/02/22-rdf-syntax-ns#Property"), Renderer: renderTerm},
{Type: rdf.IRI("http://www.w3.org/2000/01/rdf-schema#Class"), Renderer: renderTerm},
{Type: rdf.IRI("http://www.w3.org/2002/07/owl#Ontology"), Renderer: renderOntology},
{Type: rdf.IRI("http://purl.org/rss/1.0/channel"), Renderer: renderRSS},
{Type: rdf.IRI("http://www.w3.org/1999/02/22-rdf-syntax-ns#Seq"), Renderer: renderSeq},
{Type: rdf.IRI("http://www.w3.org/1999/02/22-rdf-syntax-ns#Bag"), Renderer: renderBag},
}
for _, tr := range Renderers {
if c.Type(tr.Type) {
tr.Renderer(w, c, inline, brief, level)
return
}
}
renderTable(w, c, inline, brief, level)
}
func renderTable(w io.StringWriter, c *Context, inline bool, brief bool, level int) {
if brief {
renderBrief(w, c, inline, brief, level)
return
}
op := orderedProperties(c.Properties(false))
sort.Sort(op)
writePropertyValueList(w, c, op)
}
func renderRSS(w io.StringWriter, c *Context, inline bool, brief bool, level int) {
// TODO
}
func renderSeq(w io.StringWriter, c *Context, inline bool, brief bool, level int) {
// TODO
}
func renderBag(w io.StringWriter, c *Context, inline bool, brief bool, level int) {
// TODO
}
func renderBrief(w io.StringWriter, c *Context, inline bool, brief bool, level int) {
if rdf.IsLiteral(c.Term) {
renderLiteral(w, c, inline, brief)
return
}
w.WriteString(`<div class="res">`)
defer w.WriteString(`</div>`)
writeLinkedIRI(w, c, "", false)
comment := c.Description()
if comment != "" {
w.WriteString(`<br />`)
w.WriteString(removeLeadingSpace(html.EscapeString(comment)))
}
}
func renderLiteral(w io.StringWriter, c *Context, inline bool, brief bool) {
if !rdf.IsLiteral(c.Term) {
return
}
w.WriteString(`<div class="lit">`)
defer w.WriteString(`</div>`)
value := c.Term.Value
escapeValue := true
switch c.Term.Datatype {
case "http://www.w3.org/2001/XMLSchema#date":
for _, layout := range DateLayouts {
if dt, err := time.Parse(layout, value); err == nil {
value = dt.Format("_2 Jan 2006")
break
}
}
case "http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral":
escapeValue = false
}
if escapeValue {
w.WriteString(removeLeadingSpace(html.EscapeString(value)))
} else {
w.WriteString(removeLeadingSpace(value))
}
if c.Term.Language != "" {
w.WriteString(`<span class="lang">[`)
w.WriteString(html.EscapeString(c.Term.Language))
w.WriteString(`]</span>`)
}
}
func writeDl(w io.StringWriter, c *Context, properties []rdf.Term, singular string, plural string) {
vals := c.Objects(properties...)
if len(vals) == 0 {
return
}
w.WriteString("<dt>")
if len(vals) == 1 {
w.WriteString(singular)
} else {
w.WriteString(plural)
}
w.WriteString("</dt>")
for _, v := range vals {
w.WriteString("<dd>")
renderBrief(w, c.New(v), false, true, 0) // TODO: Pass in Contexts
w.WriteString("</dd>")
}
}
func writeLinkedIRI(w io.StringWriter, c *Context, label string, useDefiniteArticle bool) {
// Deal with blank nodes
if rdf.IsBlank(c.Term) {
if label != "" {
w.WriteString(label)
return
}
writeLabelledIRI(w, c, useDefiniteArticle)
return
}
if strings.HasPrefix(c.Term.Value, "http://") || strings.HasPrefix(c.Term.Value, "https://") {
if label == "" {
iriLabel := c.Label(true, true)
if iriLabel != c.Term.Value {
label = iriLabel
}
}
if label != "" {
if useDefiniteArticle {
w.WriteString("a")
if label[0] == 'a' || label[0] == 'e' || label[0] == 'i' || label[0] == 'o' || label[0] == 'u' ||
label[0] == 'A' || label[0] == 'E' || label[0] == 'I' || label[0] == 'O' || label[0] == 'U' {
w.WriteString("n")
}
w.WriteString(" ")
}
w.WriteString(`<a href="`)
writeIRI(w, c.Term)
w.WriteString(`" class="uri">`)
w.WriteString(html.EscapeString(label))
w.WriteString(`</a>`)
return
} else if qname, err := iriToQname(c.Term); err == nil {
w.WriteString(`<a href="`)
writeIRI(w, c.Term)
w.WriteString(`" class="uri">`)
pos := strings.IndexRune(qname, ':')
w.WriteString(`<span class="prefix">`)
w.WriteString(html.EscapeString(qname[:pos]))
w.WriteString(`:</span><span class="localname">`)
w.WriteString(html.EscapeString(qname[pos+1:]))
w.WriteString(`</span>`)
w.WriteString(`</a>`)
return
}
}
w.WriteString(html.EscapeString(c.Term.Value))
}
func writeIRI(w io.StringWriter, iri rdf.Term) {
// TODO: $this->urispace->resource_uri_to_request_uri($uri)
w.WriteString(html.EscapeString(iri.Value))
}
func writeLabelledIRI(w io.StringWriter, c *Context, useDefiniteArticle bool) {
label := c.Label(true, true)
if label != c.Term.Value {
if useDefiniteArticle {
w.WriteString("a")
if label[0] == 'a' || label[0] == 'e' || label[0] == 'i' || label[0] == 'o' || label[0] == 'u' ||
label[0] == 'A' || label[0] == 'E' || label[0] == 'I' || label[0] == 'O' || label[0] == 'U' {
w.WriteString("n")
}
w.WriteString(" ")
}
w.WriteString(html.EscapeString(label))
return
} else {
if qname, err := iriToQname(c.Term); err == nil {
pos := strings.IndexRune(qname, ':')
w.WriteString(`<span class="prefix">`)
w.WriteString(html.EscapeString(qname[:pos]))
w.WriteString(`:</span><span class="localname">`)
w.WriteString(html.EscapeString(qname[pos+1:]))
w.WriteString(`</span>`)
}
}
}
func writePropertyValueList(w io.StringWriter, c *Context, properties []rdf.Term) {
headerWritten := false
rowClass := "odd"
for _, p := range properties {
if c.Done[p] {
continue
}
vals := c.Objects(p)
if len(vals) == 0 {
continue
}
var label string
if len(vals) == 1 {
label = c.New(p).Label(true, false)
} else {
label = c.New(p).PluralLabel(true, false)
}
if !headerWritten {
headerWritten = true
w.WriteString(`<table width="100%">`)
}
w.WriteString(`<tr><th valign="top" class="`)
w.WriteString(rowClass)
w.WriteString(`"><div class="label">`)
writeLinkedIRI(w, c.New(p), label, false)
w.WriteString(`</div></th><td valign="top" width="80%" class="`)
w.WriteString(rowClass)
w.WriteString(`">`)
for _, v := range vals {
if _, exists := ImageProperties[p]; exists && rdf.IsIRI(v) {
w.WriteString(`<a href="`)
writeIRI(w, v)
w.WriteString(`"><img src="`)
w.WriteString(html.EscapeString(v.Value))
w.WriteString(`" /></a>`)
} else {
render(w, c.New(v), false, true, 0)
}
}
w.WriteString(`</td></tr>`)
w.WriteString("\n")
if rowClass == "odd" {
rowClass = "even"
} else {
rowClass = "odd"
}
c.Done[p] = true
}
if headerWritten {
w.WriteString(`</table>`)
}
}
func writeAnonymousClass(w io.StringWriter, c *Context, label string) {
if label != "" {
w.WriteString(label)
return
}
// Deal with composite types
if coll, ok := c.FirstObject(rdf.IRI("http://www.w3.org/2002/07/owl#unionOf")); ok {
members := collectionMembers(c.New(coll))
switch len(members) {
case 1:
writeTerm(w, c.New(members[0]), false, true)
return
default:
w.WriteString("a class that is the union of ")
// something that, amongst other things, is a frbr:Work or a frbr:Expression
for i := range members {
if i > 0 {
w.WriteString(" and ")
}
writeTerm(w, c.New(members[i]), false, true)
}
return
}
}
if coll, ok := c.FirstObject(rdf.IRI("http://www.w3.org/2002/07/owl#intersectionOf")); ok {
members := collectionMembers(c.New(coll))
switch len(members) {
case 1:
writeTerm(w, c.New(members[0]), false, true)
return
default:
w.WriteString("a class that is the intersection of ")
for i := range members {
if i > 0 {
w.WriteString(" and ")
}
writeTerm(w, c.New(members[i]), false, true)
}
return
}
}
written := false
if c.Object(rdf.IRI("http://www.w3.org/2002/07/owl#complementOf")) {
if !written {
w.WriteString("a class that ")
}
writeRelationsProse(w, c, rdf.IRI("http://www.w3.org/2002/07/owl#complementOf"), "is the complement of ", "", false, "and", false, true)
written = true
}
if c.Object(rdf.IRI("http://www.w3.org/2002/07/owl#disjointWith")) {
if !written {
w.WriteString("a class that ")
} else {
w.WriteString("and ")
}
writeRelationsProse(w, c, rdf.IRI("http://www.w3.org/2002/07/owl#disjointWith"), "is disjoint with ", "", false, "and", false, true)
written = true
}
if c.Object(rdf.IRI("http://www.w3.org/2002/07/owl#equivalentClass")) {
if !written {
w.WriteString("a class that ")
} else {
w.WriteString("and ")
}
writeRelationsProse(w, c, rdf.IRI("http://www.w3.org/2002/07/owl#equivalentClass"), "is disjoint with ", "", false, "and", false, true)
written = true
}
if c.Object(rdf.IRI("http://www.w3.org/2000/01/rdf-schema#subClassOf")) {
if !written {
w.WriteString("a class that ")
} else {
w.WriteString("and ")
}
writeRelationsProse(w, c, rdf.IRI("http://www.w3.org/2000/01/rdf-schema#subClassOf"), "is a sub class of ", "", false, "and", false, true)
written = true
}
if c.Type(rdf.IRI("http://www.w3.org/2002/07/owl#Restriction")) {
type restriction struct {
Type string
Amount string
Term rdf.Term
}
restrictions := []restriction{}
if c.Type(rdf.IRI("http://www.w3.org/2002/07/owl#Restriction")) {
if prop, exists := c.FirstIRI(rdf.IRI("http://www.w3.org/2002/07/owl#onProperty")); exists {
if value, exists := c.FirstLiteral(rdf.IRI("http://www.w3.org/2002/07/owl#cardinality")); exists {
restrictions = append(restrictions, restriction{"exactly", value.Value, prop})
}
if value, exists := c.FirstLiteral(rdf.IRI("http://www.w3.org/2002/07/owl#minCardinality")); exists {
restrictions = append(restrictions, restriction{"at least", value.Value, prop})
}
if value, exists := c.FirstLiteral(rdf.IRI("http://www.w3.org/2002/07/owl#maxCardinality")); exists {
restrictions = append(restrictions, restriction{"at most", value.Value, prop})
}
}
}
if len(restrictions) > 0 {
if !written {
w.WriteString("a class that has ")
} else {
w.WriteString("and has ")
}
for i, r := range restrictions {
if i > 0 {
if i == len(restrictions)-1 {
w.WriteString(" and ")
} else {
w.WriteString(", ")
}
}
w.WriteString(r.Type)
w.WriteString(" ")
w.WriteString(r.Amount)
w.WriteString(" ")
writeLinkedIRI(w, c.New(r.Term), "", false)
w.WriteString(" propert")
if n, err := strconv.Atoi(r.Amount); err == nil && n != 1 {
w.WriteString("ies")
} else {
w.WriteString("y")
}
}
written = true
}
}
if written {
return
}
w.WriteString("an anonymous class")
}