mirador
Version:
An open-source, web-based 'multi-up' viewer that supports zoom-pan-rotate functionality, ability to display/compare simple images, and images with annotations.
310 lines (260 loc) • 12.6 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var _normalizeUrl = _interopRequireDefault(require("normalize-url"));
var _MiradorCanvas = _interopRequireDefault(require("./MiradorCanvas"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) { symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); } keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); }
function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter); }
function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) return _arrayLikeToArray(arr); }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
/**
* CanvasWorld
*/
var CanvasWorld = /*#__PURE__*/function () {
/**
* @param {Array} canvases - Array of Manifesto:Canvas objects to create a
* world from.
*/
function CanvasWorld(canvases, layers) {
var viewingDirection = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 'left-to-right';
_classCallCheck(this, CanvasWorld);
this.canvases = canvases.map(function (c) {
return new _MiradorCanvas["default"](c);
});
this.layers = layers;
this.viewingDirection = viewingDirection;
this._canvasDimensions = null; // eslint-disable-line no-underscore-dangle
}
/** */
_createClass(CanvasWorld, [{
key: "canvasIds",
get: function get() {
return this.canvases.map(function (canvas) {
return canvas.id;
});
}
/** */
}, {
key: "canvasDimensions",
get: function get() {
if (this._canvasDimensions) {
// eslint-disable-line no-underscore-dangle
return this._canvasDimensions; // eslint-disable-line no-underscore-dangle
}
var _this$canvasDirection = _slicedToArray(this.canvasDirection, 2),
dirX = _this$canvasDirection[0],
dirY = _this$canvasDirection[1];
var scale = dirY === 0 ? Math.min.apply(Math, _toConsumableArray(this.canvases.map(function (c) {
return c.getHeight();
}))) : Math.min.apply(Math, _toConsumableArray(this.canvases.map(function (c) {
return c.getWidth();
})));
var incX = 0;
var incY = 0;
var canvasDims = this.canvases.reduce(function (acc, canvas) {
var canvasHeight = 0;
var canvasWidth = 0;
if (!isNaN(canvas.aspectRatio)) {
if (dirY === 0) {
// constant height
canvasHeight = scale;
canvasWidth = Math.floor(scale * canvas.aspectRatio);
} else {
// constant width
canvasWidth = scale;
canvasHeight = Math.floor(scale * (1 / canvas.aspectRatio));
}
}
acc.push({
canvas: canvas,
height: canvasHeight,
width: canvasWidth,
x: incX,
y: incY
});
incX += dirX * canvasWidth;
incY += dirY * canvasHeight;
return acc;
}, []);
var worldHeight = dirY === 0 ? scale : Math.abs(incY);
var worldWidth = dirX === 0 ? scale : Math.abs(incX);
this._canvasDimensions = canvasDims // eslint-disable-line no-underscore-dangle
.reduce(function (acc, dims) {
acc.push(_objectSpread(_objectSpread({}, dims), {}, {
x: dirX === -1 ? dims.x + worldWidth - dims.width : dims.x,
y: dirY === -1 ? dims.y + worldHeight - dims.height : dims.y
}));
return acc;
}, []);
return this._canvasDimensions; // eslint-disable-line no-underscore-dangle
}
/**
* contentResourceToWorldCoordinates - calculates the contentResource coordinates
* respective to the world.
*/
}, {
key: "contentResourceToWorldCoordinates",
value: function contentResourceToWorldCoordinates(contentResource) {
var miradorCanvasIndex = this.canvases.findIndex(function (c) {
return c.imageResources.find(function (r) {
return r.id === contentResource.id;
});
});
var canvas = this.canvases[miradorCanvasIndex];
if (!canvas) return [];
var _this$canvasToWorldCo = this.canvasToWorldCoordinates(canvas.id),
_this$canvasToWorldCo2 = _slicedToArray(_this$canvasToWorldCo, 4),
x = _this$canvasToWorldCo2[0],
y = _this$canvasToWorldCo2[1],
w = _this$canvasToWorldCo2[2],
h = _this$canvasToWorldCo2[3];
var fragmentOffset = canvas.onFragment(contentResource.id);
if (fragmentOffset) {
return [x + fragmentOffset[0], y + fragmentOffset[1], fragmentOffset[2], fragmentOffset[3]];
}
return [x, y, w, h];
}
/** */
}, {
key: "canvasToWorldCoordinates",
value: function canvasToWorldCoordinates(canvasId) {
var canvasDimensions = this.canvasDimensions.find(function (c) {
return c.canvas.id === canvasId;
});
return [canvasDimensions.x, canvasDimensions.y, canvasDimensions.width, canvasDimensions.height];
}
/** */
}, {
key: "canvasDirection",
get: function get() {
switch (this.viewingDirection) {
case 'left-to-right':
return [1, 0];
case 'right-to-left':
return [-1, 0];
case 'top-to-bottom':
return [0, 1];
case 'bottom-to-top':
return [0, -1];
default:
return [1, 0];
}
}
/** Get the IIIF content resource for an image */
}, {
key: "contentResource",
value: function contentResource(infoResponseId) {
var miradorCanvas = this.canvases.find(function (c) {
return c.imageServiceIds.some(function (id) {
return (0, _normalizeUrl["default"])(id, {
stripAuthentication: false
}) === (0, _normalizeUrl["default"])(infoResponseId, {
stripAuthentication: false
});
});
});
if (!miradorCanvas) return undefined;
return miradorCanvas.imageResources.find(function (r) {
return (0, _normalizeUrl["default"])(r.getServices()[0].id, {
stripAuthentication: false
}) === (0, _normalizeUrl["default"])(infoResponseId, {
stripAuthentication: false
});
});
}
/** @private */
}, {
key: "getLayerMetadata",
value: function getLayerMetadata(contentResource) {
if (!this.layers) return undefined;
var miradorCanvas = this.canvases.find(function (c) {
return c.imageResources.find(function (r) {
return r.id === contentResource.id;
});
});
if (!miradorCanvas) return undefined;
var resourceIndex = miradorCanvas.imageResources.findIndex(function (r) {
return r.id === contentResource.id;
});
var layer = this.layers[miradorCanvas.canvas.id];
var imageResourceLayer = layer && layer[contentResource.id];
return _objectSpread({
index: resourceIndex,
opacity: 1,
total: miradorCanvas.imageResources.length,
visibility: true
}, imageResourceLayer);
}
/** */
}, {
key: "layerOpacityOfImageResource",
value: function layerOpacityOfImageResource(contentResource) {
var layer = this.getLayerMetadata(contentResource);
if (!layer) return 1;
if (!layer.visibility) return 0;
return layer.opacity;
}
/** */
}, {
key: "layerIndexOfImageResource",
value: function layerIndexOfImageResource(contentResource) {
var layer = this.getLayerMetadata(contentResource);
if (!layer) return undefined;
return layer.total - layer.index - 1;
}
/**
* offsetByCanvas - calculates the offset for a given canvas target. Currently
* assumes a horrizontal only layout.
*/
}, {
key: "offsetByCanvas",
value: function offsetByCanvas(canvasTarget) {
var coordinates = this.canvasToWorldCoordinates(canvasTarget);
return {
x: coordinates[0],
y: coordinates[1]
};
}
/**
* worldBounds - calculates the "World" bounds. World in this case is canvases
* lined up horizontally starting from left to right.
*/
}, {
key: "worldBounds",
value: function worldBounds() {
var worldWidth = Math.max.apply(Math, _toConsumableArray(this.canvasDimensions.map(function (c) {
return c.x + c.width;
})));
var worldHeight = Math.max.apply(Math, _toConsumableArray(this.canvasDimensions.map(function (c) {
return c.y + c.height;
})));
return [0, 0, worldWidth, worldHeight];
}
/** */
}, {
key: "canvasAtPoint",
value: function canvasAtPoint(point) {
var canvasDimensions = this.canvasDimensions.find(function (c) {
return c.x <= point.x && point.x <= c.x + c.width && c.y <= point.y && point.y <= c.y + c.height;
});
return canvasDimensions && canvasDimensions.canvas;
}
}]);
return CanvasWorld;
}();
exports["default"] = CanvasWorld;