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/* -*- Mode: JS2; indent-tabs-mode: nil; js2-basic-offset: 4 -*- */
/* vim: set et ts=4 sw=4: */
/*
* Copyright (c) 2011, 2012, 2013 Red Hat, Inc.
* Copyright (c) 2014 Damián Nohales
*
* GNOME Maps is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* GNOME Maps is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with GNOME Maps; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Zeeshan Ali (Khattak) <zeeshanak@gnome.org>
* Damián Nohales <damiannohales@gmail.com>
*/
import GObject from 'gi://GObject';
import {BoundingBox} from './boundingBox.js';
import {Location} from './location.js';
import * as PlaceZoom from './placeZoom.js';
import * as Utils from './utils.js';
const _MAX_DISTANCE = 19850; // half of Earth's circumference (km)
const _MIN_ANIMATION_DURATION = 2000; // msec
const _MAX_ANIMATION_DURATION = 5000; // msec
export class MapWalker extends GObject.Object {
constructor(place, mapView) {
super();
this.place = place;
this._mapView = mapView;
this._viewport = mapView.map.viewport;
this._boundingBox = this._createBoundingBox(this.place);
}
_createBoundingBox(place) {
if (place.bounding_box !== null) {
return new BoundingBox({ top: place.bounding_box.top,
bottom: place.bounding_box.bottom,
left: place.bounding_box.left,
right: place.bounding_box.right });
} else {
return null;
}
}
_getZoomLevel() {
let zoom;
if (this.place.initialZoom) {
zoom = this.place.initialZoom;
} else {
zoom = PlaceZoom.getZoomLevelForPlace(this.place) ??
this._viewport.max_zoom_level;
/* If the place has a bounding box, use the lower of the default
* zoom level based on the place's type and the zoom level needed
* fit the bounding box. This way we ensure the bounding box will
* be all visible and we also have an appropriate amount
* of context for the place
*/
if (this._boundingBox !== null && this._boundingBox.isValid()) {
let bboxZoom =
this._mapView.getZoomLevelFittingBBox(this._boundingBox);
zoom = Math.min(zoom, bboxZoom);
}
}
return zoom;
}
// Zoom to the maximal zoom-level that fits the place type
zoomToFit() {
let zoom = this._getZoomLevel();
/*
* WORKAROUND!!!!
*
* For now disable the animation to prevent getting
* throttled by the tile server:
* https://gitlab.gnome.org/GNOME/gnome-maps/-/issues/546
*/
this._mapView.map.center_on(this.place.location.latitude,
this.place.location.longitude);
this._mapView.map.viewport.zoom_level = zoom;
}
goTo(animate, linear) {
let zoom = this._getZoomLevel();
Utils.debug('Going to ' + [this.place.name,
this.place.location.latitude,
this.place.location.longitude].join(' '));
this._mapView.emit('going-to');
/*
* WORKAROUND!!!!
*
* For now disable the go-to animation to prevent getting
* throttled by the tile server:
* https://gitlab.gnome.org/GNOME/gnome-maps/-/issues/546
*/
animate = false;
if (!animate) {
this._mapView.map.center_on(this.place.location.latitude,
this.place.location.longitude);
this._mapView.map.viewport.zoom_level = zoom;
this.emit('gone-to');
return;
} else {
this._mapView.map.go_to_full(this.place.location.latitude,
this.place.location.longitude,
zoom);
Utils.once(this._mapView.map, 'animation-completed::go-to',
() => this.emit('gone-to'));
}
}
_ensureVisible(fromLocation) {
let visibleBox = null;
if (this._boundingBox !== null && this._boundingBox.isValid()) {
visibleBox = this._boundingBox.copy();
visibleBox.extend(fromLocation.latitude, fromLocation.longitude);
} else {
visibleBox = new BoundingBox({ left: 180,
right: -180,
bottom: 90,
top: -90 });
[fromLocation, this.place.location].forEach((location) => {
visibleBox.left = Math.min(visibleBox.left, location.longitude);
visibleBox.right = Math.max(visibleBox.right, location.longitude);
visibleBox.bottom = Math.min(visibleBox.bottom, location.latitude);
visibleBox.top = Math.max(visibleBox.top, location.latitude);
});
}
let [lon, lat] = visibleBox.getCenter();
this._view.zoom_level = this._mapView.getZoomLevelFittingBBox(visibleBox);
this._view.go_to(lat, lon);
}
_boxCovers(coverBox) {
if (this._boundingBox === null)
return false;
if (coverBox.left > this._boundingBox.left)
return false;
if (coverBox.right < this._boundingBox.right)
return false;
if (coverBox.top < this._boundingBox.top)
return false;
if (coverBox.bottom > this._boundingBox.bottom)
return false;
return true;
}
}
GObject.registerClass({
Signals: {
'gone-to': { }
}
}, MapWalker);
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