1+ L . TileJSON = ( function ( ) {
2+ var semver = "\\s*[v=]*\\s*([0-9]+)" // major
3+ + "\\.([0-9]+)" // minor
4+ + "\\.([0-9]+)" // patch
5+ + "(-[0-9]+-?)?" // build
6+ + "([a-zA-Z-][a-zA-Z0-9-\.:]*)?" ; // tag
7+ var semverRegEx = new RegExp ( "^\\s*" + semver + "\\s*$" ) ;
8+
9+ var parse = function ( v ) {
10+ return v . match ( semverRegEx ) ;
11+ } ;
12+
13+ function defined ( o ) {
14+ return ( typeof o !== "undefined" && o !== null ) ;
15+ }
16+
17+ function validateVersion ( tileJSON ) {
18+ if ( ! tileJSON . tilejson ) {
19+ throw new Exception ( 'Missing property "tilejson".' ) ;
20+ }
21+
22+ v = parse ( tileJSON . tilejson ) ;
23+ if ( ! v || v [ 1 ] != 2 ) {
24+ throw new Exception ( 'This parser supports version 2 '
25+ + 'of TileJSON. (Provided version: "'
26+ + tileJSON . tilejson + '"' ) ;
27+ }
28+ } ;
29+
30+ function parseZoom ( tileJSON , cfg ) {
31+ if ( tileJSON . minzoom ) {
32+ cfg . minZoom = parseInt ( tileJSON . minzoom ) ;
33+ }
34+
35+ if ( tileJSON . maxzoom ) {
36+ cfg . maxZoom = parseInt ( tileJSON . maxzoom ) ;
37+ } else {
38+ cfg . maxZoom = 22 ;
39+ }
40+
41+ return cfg ;
42+ }
43+
44+ function createMapConfig ( tileJSON , cfg ) {
45+ validateVersion ( tileJSON ) ;
46+
47+ if ( ! defined ( cfg ) ) {
48+ cfg = { } ;
49+ }
50+
51+ parseZoom ( tileJSON , cfg ) ;
52+
53+ if ( tileJSON . center ) {
54+ var center = tileJSON . center ;
55+ cfg . center = new L . LatLng ( center [ 1 ] , center [ 0 ] ) ;
56+ cfg . zoom = center [ 2 ] ;
57+ }
58+
59+ if ( tileJSON . attribution ) {
60+ cfg . attributionControl = true ;
61+ }
62+
63+ if ( tileJSON . projection ) {
64+ var t = tileJSON . transform ;
65+ cfg . crs =
66+ L . CRS . proj4js ( tileJSON . crs ,
67+ tileJSON . projection ,
68+ new L . Transformation ( t [ 0 ] , t [ 1 ] , t [ 2 ] , t [ 3 ] ) ) ;
69+ // FIXME: This might not be true for all projections, actually
70+ cfg . continuousWorld = true ;
71+ }
72+
73+ if ( tileJSON . scales ) {
74+ var s = tileJSON . scales ;
75+ cfg . scale = function ( zoom ) {
76+ return s [ zoom ] ;
77+ }
78+ }
79+
80+ return cfg ;
81+ } ;
82+
83+ function createTileLayerConfig ( tileJSON , cfg ) {
84+ validateVersion ( tileJSON ) ;
85+
86+ if ( ! defined ( cfg ) ) {
87+ cfg = { } ;
88+ }
89+
90+ parseZoom ( tileJSON , cfg ) ;
91+
92+ if ( tileJSON . attribution ) {
93+ cfg . attribution = tileJSON . attribution ;
94+ }
95+
96+ if ( tileJSON . scheme ) {
97+ cfg . scheme = tileJSON . scheme ;
98+ }
99+
100+ if ( tileJSON . projection ) {
101+ // FIXME: This might not be true for all projections, actually
102+ cfg . continuousWorld = true ;
103+ }
104+
105+ return cfg ;
106+ } ;
107+
108+
109+
110+
111+ function createTileLayer ( tileJSON ) {
112+ var tileUrl = tileJSON . tiles [ 0 ] . replace ( / \$ ( { [ s x y z ] } ) / g, '$1' ) ;
113+ return new L . TileLayer ( tileUrl , createTileLayerConfig ( tileJSON ) ) ;
114+ } ;
115+
116+ function createMap ( id , tileJSON , options ) {
117+ var mapConfig ;
118+ var tileLayerConfig ;
119+
120+ if ( defined ( options ) ) {
121+ mapConfig = options . mapOptions ;
122+ tileLayerConfig = options . tileLayerOptions ;
123+ } else {
124+ mapConfig = { } ;
125+ tileLayerConfig = { } ;
126+ }
127+
128+ var mapConfig = createMapConfig ( tileJSON , mapConfig ) ;
129+ mapConfig . layers = [ createTileLayer ( tileJSON , tileLayerConfig ) ] ;
130+ return new L . Map ( id , mapConfig ) ;
131+ }
132+
133+ return {
134+ createMapConfig : createMapConfig ,
135+
136+ createTileLayerConfig : createTileLayerConfig ,
137+
138+ createTileLayer : createTileLayer ,
139+
140+ createMap : createMap
141+ }
142+ } ( ) ) ;
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