staticmaps
Version:
A Node.js library for creating map images with markers, polylines, polygons and text.
248 lines (245 loc) • 10.1 kB
JavaScript
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var _regenerator = _interopRequireDefault(require("@babel/runtime/regenerator"));
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));
var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));
var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));
var _sharp = _interopRequireDefault(require("sharp"));
var _lodash = _interopRequireDefault(require("lodash.last"));
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { (0, _defineProperty2["default"])(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
var Image = exports["default"] = /*#__PURE__*/function () {
function Image() {
var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
(0, _classCallCheck2["default"])(this, Image);
this.options = options;
this.width = this.options.width;
this.height = this.options.height;
this.quality = this.options.quality || 100;
}
/**
* Prepare all tiles to fit the baselayer
*/
(0, _createClass2["default"])(Image, [{
key: "prepareTileParts",
value: function prepareTileParts(data) {
var _this = this;
return new Promise(function (resolve) {
var tile = (0, _sharp["default"])(data.body);
tile.metadata().then(function (metadata) {
var x = data.box[0];
var y = data.box[1];
var sx = x < 0 ? 0 : x;
var sy = y < 0 ? 0 : y;
var dx = x < 0 ? -x : 0;
var dy = y < 0 ? -y : 0;
var extraWidth = x + (metadata.width - _this.width);
var extraHeight = y + (metadata.width - _this.height);
var w = metadata.width + (x < 0 ? x : 0) - (extraWidth > 0 ? extraWidth : 0);
var h = metadata.height + (y < 0 ? y : 0) - (extraHeight > 0 ? extraHeight : 0);
// Fixed #20 https://github.com/StephanGeorg/staticmaps/issues/20
if (!w || !h) {
resolve({
success: false
});
return null;
}
return tile.extract({
left: dx,
top: dy,
width: w,
height: h
}).toBuffer().then(function (part) {
resolve({
success: true,
position: {
top: Math.round(sy),
left: Math.round(sx)
},
data: part
});
})["catch"](function () {
return resolve({
success: false
});
});
})["catch"](function () {
return resolve({
success: false
});
});
});
}
}, {
key: "draw",
value: function () {
var _draw = (0, _asyncToGenerator2["default"])( /*#__PURE__*/_regenerator["default"].mark(function _callee(tiles) {
var _this2 = this;
var baselayer, tileParts, preparedTiles, preparedTilesForSharp;
return _regenerator["default"].wrap(function _callee$(_context) {
while (1) switch (_context.prev = _context.next) {
case 0:
this.tempBuffer = null;
if (this.image) {
_context.next = 8;
break;
}
// Generate baseimage
baselayer = (0, _sharp["default"])({
create: {
width: this.width,
height: this.height,
channels: 4,
background: {
r: 0,
g: 0,
b: 0,
alpha: 0
}
}
}); // Save baseImage as buffer
_context.next = 5;
return baselayer.png().toBuffer();
case 5:
this.tempBuffer = _context.sent;
_context.next = 9;
break;
case 8:
this.tempBuffer = this.image;
case 9:
// Prepare tiles for composing baselayer
tileParts = [];
tiles.forEach(function (tile, i) {
tileParts.push(_this2.prepareTileParts(tile, i));
});
_context.next = 13;
return Promise.all(tileParts);
case 13:
preparedTiles = _context.sent.filter(function (v) {
return v.success;
});
// Compose all prepared tiles to the baselayer
preparedTilesForSharp = preparedTiles.filter(function (preparedTile) {
return !!preparedTile;
}) // remove non-existing tiles
.map(function (preparedTile) {
var position = preparedTile.position,
data = preparedTile.data;
position.top = Math.round(position.top);
position.left = Math.round(position.left);
return _objectSpread({
input: data
}, position);
});
_context.next = 17;
return (0, _sharp["default"])(this.tempBuffer).composite(preparedTilesForSharp).toBuffer();
case 17:
this.tempBuffer = _context.sent;
this.image = this.tempBuffer;
return _context.abrupt("return", true);
case 20:
case "end":
return _context.stop();
}
}, _callee, this);
}));
function draw(_x) {
return _draw.apply(this, arguments);
}
return draw;
}()
/**
* Save image to file
*/
}, {
key: "save",
value: (function () {
var _save = (0, _asyncToGenerator2["default"])( /*#__PURE__*/_regenerator["default"].mark(function _callee2() {
var fileName,
outOpts,
format,
outputOptions,
_args2 = arguments;
return _regenerator["default"].wrap(function _callee2$(_context2) {
while (1) switch (_context2.prev = _context2.next) {
case 0:
fileName = _args2.length > 0 && _args2[0] !== undefined ? _args2[0] : 'output.png';
outOpts = _args2.length > 1 && _args2[1] !== undefined ? _args2[1] : {};
format = (0, _lodash["default"])(fileName.split('.'));
outputOptions = outOpts;
outputOptions.quality = outputOptions.quality || this.quality;
_context2.t0 = format.toLowerCase();
_context2.next = _context2.t0 === 'webp' ? 8 : _context2.t0 === 'jpg' ? 11 : _context2.t0 === 'jpeg' ? 11 : _context2.t0 === 'png' ? 14 : 14;
break;
case 8:
_context2.next = 10;
return (0, _sharp["default"])(this.image).webp(outputOptions).toFile(fileName);
case 10:
return _context2.abrupt("break", 16);
case 11:
_context2.next = 13;
return (0, _sharp["default"])(this.image).jpeg(outputOptions).toFile(fileName);
case 13:
return _context2.abrupt("break", 16);
case 14:
_context2.next = 16;
return (0, _sharp["default"])(this.image).png(outputOptions).toFile(fileName);
case 16:
case "end":
return _context2.stop();
}
}, _callee2, this);
}));
function save() {
return _save.apply(this, arguments);
}
return save;
}()
/**
* Return image as buffer
*/
)
}, {
key: "buffer",
value: (function () {
var _buffer = (0, _asyncToGenerator2["default"])( /*#__PURE__*/_regenerator["default"].mark(function _callee3() {
var mime,
outOpts,
outputOptions,
_args3 = arguments;
return _regenerator["default"].wrap(function _callee3$(_context3) {
while (1) switch (_context3.prev = _context3.next) {
case 0:
mime = _args3.length > 0 && _args3[0] !== undefined ? _args3[0] : 'image/png';
outOpts = _args3.length > 1 && _args3[1] !== undefined ? _args3[1] : {};
outputOptions = outOpts;
outputOptions.quality = outputOptions.quality || this.quality;
_context3.t0 = mime.toLowerCase();
_context3.next = _context3.t0 === 'image/webp' ? 7 : _context3.t0 === 'image/jpeg' ? 8 : _context3.t0 === 'image/jpg' ? 8 : _context3.t0 === 'image/png' ? 9 : 9;
break;
case 7:
return _context3.abrupt("return", (0, _sharp["default"])(this.image).webp(outputOptions).toBuffer());
case 8:
return _context3.abrupt("return", (0, _sharp["default"])(this.image).jpeg(outputOptions).toBuffer());
case 9:
return _context3.abrupt("return", (0, _sharp["default"])(this.image).png(outputOptions).toBuffer());
case 10:
case "end":
return _context3.stop();
}
}, _callee3, this);
}));
function buffer() {
return _buffer.apply(this, arguments);
}
return buffer;
}())
}]);
return Image;
}();
module.exports = Image;