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decorate.js
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decorate.js
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// The MIT License (MIT)
//
// Copyright (c) 2014-2021 Camptocamp SA
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
import olInteractionInteraction from 'ol/interaction/Interaction';
import olLayerBase from 'ol/layer/Base';
import olLayerGroup from 'ol/layer/Group';
import olLayerLayer from 'ol/layer/Layer';
import olSourceImage from 'ol/source/Image';
import olSourceTile from 'ol/source/Tile';
/**
* Provides a function that adds an "active" property (using
* `Object.defineProperty`) to an interaction, making it possible to use ngModel
* to activate/deactivate interactions.
*
* Example:
*
* <input type="checkbox" ngModel="interaction.active" />
*
* @param {import('ol/interaction/Interaction').default} interaction Interaction to decorate.
*/
export function interactionDecoration(interaction) {
console.assert(interaction instanceof olInteractionInteraction);
Object.defineProperty(interaction, 'active', {
get: () => interaction.getActive(),
set: (val) => {
interaction.setActive(val);
},
});
}
/**
* Provides a function that adds properties (using
* `Object.defineProperty`) to the layer, making it possible to control layer
* properties with ngModel.
*
* Example:
*
* <input type="checkbox" ngModel="layer.visible" />
*
* @param {import('ol/layer/Base').default} layer Layer to decorate.
*/
export function layerDecoration(layer) {
console.assert(layer instanceof olLayerBase);
Object.defineProperty(layer, 'visible', {
configurable: true,
/**
* @returns {boolean} Visible.
*/
get: () => layer.getVisible(),
/**
* @param {boolean} val Visible.
*/
set: (val) => {
layer.setVisible(val);
},
});
Object.defineProperty(layer, 'opacity', {
configurable: true,
/**
* @returns {number} Opacity.
*/
get: () => layer.getOpacity(),
/**
* @param {number} val Opacity.
*/
set: (val) => {
layer.setOpacity(val);
},
});
}
/**
* Provides a function that adds a 'loading 'property (using
* `Object.defineProperty`) to an ol.layer.Group or a layer with
* an ol.source.Tile or an ol.source.Image source.
* This property is true when the layer is loading and false otherwise.
*
* Example:
*
* <span ng-if="layer.loading">please wait</span>
*
* @param {import('ol/layer/Base').default} layer layer.
* @param {angular.IScope} $scope Scope.
*/
export function layerLoading(layer, $scope) {
let source;
/**
* @type {string[]}
*/
let incrementEvents = [];
/**
* @type {string[]}
*/
let decrementEvents = [];
/**
* @function
* @private
*/
const incrementLoadCount_ = increment_;
/**
* @function
* @private
*/
const decrementLoadCount_ = decrement_;
layer.set('load_count', 0, true);
if (layer instanceof olLayerGroup) {
layer.getLayers().on(
/** @type {import('ol/Observable').EventTypes} */ ('add'),
/** @type {function(?): ?} */ (
/**
* @param {import('ol/Collection').CollectionEvent} olEvent the progress event.
*/
(olEvent) => {
const newLayer = olEvent.element;
newLayer.set('parent_group', layer);
}
)
);
}
if (layer instanceof olLayerLayer) {
source = layer.getSource();
if (source === null) {
return;
} else if (source instanceof olSourceTile) {
incrementEvents = ['tileloadstart'];
decrementEvents = ['tileloadend', 'tileloaderror'];
} else if (source instanceof olSourceImage) {
incrementEvents = ['imageloadstart'];
decrementEvents = ['imageloadend', 'imageloaderror'];
} else {
console.assert(false, 'unsupported source type');
}
source.on(incrementEvents, () => {
incrementLoadCount_(layer);
$scope.$applyAsync();
});
source.on(decrementEvents, () => {
decrementLoadCount_(layer);
$scope.$applyAsync();
});
}
Object.defineProperty(layer, 'loading', {
configurable: true,
get: () => /** @type {number} */ (layer.get('load_count')) > 0,
});
/**
* @function
* @param {import('ol/layer/Base').default} layer Layer
* @private
*/
function increment_(layer) {
let load_count = /** @type {number} */ (layer.get('load_count'));
/**
* @type {import('ol/layer/Base').default}
*/
const parent = layer.get('parent_group');
layer.set('load_count', ++load_count, true);
if (parent) {
increment_(parent);
}
}
/**
* @function
* @param {import('ol/layer/Base').default} layer Layer
* @private
*/
function decrement_(layer) {
let load_count = /** @type {number} */ (layer.get('load_count'));
/**
* @type {import('ol/layer/Base').default}
*/
const parent = layer.get('parent_group');
layer.set('load_count', --load_count, true);
if (parent) {
decrement_(parent);
}
}
}