# all files / ol/ tilecoord.js

100% Statements 60/60
100% Branches 16/16
100% Functions 8/8
100% Lines 60/60

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    113
    114
    115
    116
    117
    118
    119
    120
    121
    122
    123
    124
    125
    126
    127
    128
    129
    130
    131
    132
    133
    134
    135
    136
    137
    138
    139
    140
    141
    142
    143
    144
    145
    146
    147
    148
    149
    150
    151
    152
    1531×
    1×

    1×
    1×

    1×

    1×

    1×
    1×
    1×

    1×
    3×

    1×
    8054×
    7992×
    7992×
    7992×
    7992×

    62×

    1×
    252×

    1×
    18×

    1×
    13×
    13×
    13×
    13×
    13×
    45×
    45×
    16×

    45×
    22×

    45×
    45×

    13×

    1×
    45×
    45×
    45×
    45×
    12×
    12×
    12×
    12×

    33×

    1×
    91×
    91×
    91×

    91×
    2×

    89×
    89×
    89×
    18×

    71×

    89×
    6×

    83×

     goog.provide('ol.TileCoord');
    goog.provide('ol.tilecoord');

    goog.require('goog.asserts');
    goog.require('ol.extent');

    /**
     * An array of three numbers representing the location of a tile in a tile
     * grid. The order is `z`, `x`, and `y`. `z` is the zoom level.
     * @typedef {Array.<number>} ol.TileCoord
     * @api
     */
    ol.TileCoord;

    /**
     * @enum {number}
     */
    ol.QuadKeyCharCode = {
      ZERO: '0'.charCodeAt(0),
      ONE: '1'.charCodeAt(0),
      TWO: '2'.charCodeAt(0),
      THREE: '3'.charCodeAt(0)
    };

    /**
     * @param {string} str String that follows pattern “z/x/y” where x, y and z are
     *   numbers.
     * @return {ol.TileCoord} Tile coord.
     */
    ol.tilecoord.createFromString = function(str) {
      var v = str.split('/');
      goog.asserts.assert(v.length === 3,
          'must provide a string in "z/x/y" format, got "%s"', str);
      return v.map(function(e) {
        return parseInt(e, 10);
      });
    };

    /**
     * @param {number} z Z.
     * @param {number} x X.
     * @param {number} y Y.
     * @param {ol.TileCoord=} opt_tileCoord Tile coordinate.
     * @return {ol.TileCoord} Tile coordinate.
     */
    ol.tilecoord.createOrUpdate = function(z, x, y, opt_tileCoord) {
      if (opt_tileCoord !== undefined) {
        opt_tileCoord[0] = z;
        opt_tileCoord[1] = x;
        opt_tileCoord[2] = y;
        return opt_tileCoord;
      } else {
        return [z, x, y];
      }
    };

    /**
     * @param {number} z Z.
     * @param {number} x X.
     * @param {number} y Y.
     * @return {string} Key.
     */
    ol.tilecoord.getKeyZXY = function(z, x, y) {
      return z + '/' + x + '/' + y;
    };

    /**
     * @param {ol.TileCoord} tileCoord Tile coord.
     * @return {number} Hash.
     */
    ol.tilecoord.hash = function(tileCoord) {
      return (tileCoord[1] << tileCoord[0]) + tileCoord[2];
    };

    /**
     * @param {ol.TileCoord} tileCoord Tile coord.
     * @return {string} Quad key.
     */
    ol.tilecoord.quadKey = function(tileCoord) {
      var z = tileCoord[0];
      var digits = new Array(z);
      var mask = 1 << (z - 1);
      var i, charCode;
      for (i = 0; i < z; ++i) {
        charCode = ol.QuadKeyCharCode.ZERO;
        if (tileCoord[1] & mask) {
          charCode += 1;
        }
        if (tileCoord[2] & mask) {
          charCode += 2;
        }
        digits[i] = String.fromCharCode(charCode);
        mask >>= 1;
      }
      return digits.join('');
    };

    /**
     * @param {ol.TileCoord} tileCoord Tile coordinate.
     * @param {ol.tilegrid.TileGrid} tileGrid Tile grid.
     * @param {ol.proj.Projection} projection Projection.
     * @return {ol.TileCoord} Tile coordinate.
     */
    ol.tilecoord.wrapX = function(tileCoord, tileGrid, projection) {
      var z = tileCoord[0];
      var center = tileGrid.getTileCoordCenter(tileCoord);
      var projectionExtent = ol.tilegrid.extentFromProjection(projection);
      if (!ol.extent.containsCoordinate(projectionExtent, center)) {
        var worldWidth = ol.extent.getWidth(projectionExtent);
        var worldsAway = Math.ceil((projectionExtent[0] - center[0]) / worldWidth);
        center[0] += worldWidth * worldsAway;
        return tileGrid.getTileCoordForCoordAndZ(center, z);
      } else {
        return tileCoord;
      }
    };

    /**
     * @param {ol.TileCoord} tileCoord Tile coordinate.
     * @param {!ol.tilegrid.TileGrid} tileGrid Tile grid.
     * @return {boolean} Tile coordinate is within extent and zoom level range.
     */
    ol.tilecoord.withinExtentAndZ = function(tileCoord, tileGrid) {
      var z = tileCoord[0];
      var x = tileCoord[1];
      var y = tileCoord[2];

      if (tileGrid.getMinZoom() > z || z > tileGrid.getMaxZoom()) {
        return false;
      }
      var extent = tileGrid.getExtent();
      var tileRange;
      if (!extent) {
        tileRange = tileGrid.getFullTileRange(z);
      } else {
        tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);
      }
      if (!tileRange) {
        return true;
      } else {
        return tileRange.containsXY(x, y);
      }
    };