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import {Map} from '../Map';
import {Handler} from '../../core/Handler';
import {on, off, stop} from '../../dom/DomEvent';
import {toPoint} from '../../geometry/Point';
/*
* L.Map.Keyboard is handling keyboard interaction with the map, enabled by default.
*/
// @namespace Map
// @section Keyboard Navigation Options
Map.mergeOptions({
// @option keyboard: Boolean = true
// Makes the map focusable and allows users to navigate the map with keyboard
// arrows and `+`/`-` keys.
keyboard: true,
// @option keyboardPanDelta: Number = 80
// Amount of pixels to pan when pressing an arrow key.
keyboardPanDelta: 80
});
export var Keyboard = Handler.extend({
keyCodes: {
left: [37],
right: [39],
down: [40],
up: [38],
zoomIn: [187, 107, 61, 171],
zoomOut: [189, 109, 54, 173]
},
initialize: function (map) {
this._map = map;
this._setPanDelta(map.options.keyboardPanDelta);
this._setZoomDelta(map.options.zoomDelta);
},
addHooks: function () {
var container = this._map._container;
// make the container focusable by tabbing
if (container.tabIndex <= 0) {
container.tabIndex = '0';
}
on(container, {
focus: this._onFocus,
blur: this._onBlur,
mousedown: this._onMouseDown
}, this);
this._map.on({
focus: this._addHooks,
blur: this._removeHooks
}, this);
},
removeHooks: function () {
this._removeHooks();
off(this._map._container, {
focus: this._onFocus,
blur: this._onBlur,
mousedown: this._onMouseDown
}, this);
this._map.off({
focus: this._addHooks,
blur: this._removeHooks
}, this);
},
_onMouseDown: function () {
if (this._focused) { return; }
var body = document.body,
docEl = document.documentElement,
top = body.scrollTop || docEl.scrollTop,
left = body.scrollLeft || docEl.scrollLeft;
this._map._container.focus();
window.scrollTo(left, top);
},
_onFocus: function () {
this._focused = true;
this._map.fire('focus');
},
_onBlur: function () {
this._focused = false;
this._map.fire('blur');
},
_setPanDelta: function (panDelta) {
var keys = this._panKeys = {},
codes = this.keyCodes,
i, len;
for (i = 0, len = codes.left.length; i < len; i++) {
keys[codes.left[i]] = [-1 * panDelta, 0];
}
for (i = 0, len = codes.right.length; i < len; i++) {
keys[codes.right[i]] = [panDelta, 0];
}
for (i = 0, len = codes.down.length; i < len; i++) {
keys[codes.down[i]] = [0, panDelta];
}
for (i = 0, len = codes.up.length; i < len; i++) {
keys[codes.up[i]] = [0, -1 * panDelta];
}
},
_setZoomDelta: function (zoomDelta) {
var keys = this._zoomKeys = {},
codes = this.keyCodes,
i, len;
for (i = 0, len = codes.zoomIn.length; i < len; i++) {
keys[codes.zoomIn[i]] = zoomDelta;
}
for (i = 0, len = codes.zoomOut.length; i < len; i++) {
keys[codes.zoomOut[i]] = -zoomDelta;
}
},
_addHooks: function () {
on(document, 'keydown', this._onKeyDown, this);
},
_removeHooks: function () {
off(document, 'keydown', this._onKeyDown, this);
},
_onKeyDown: function (e) {
if (e.altKey || e.ctrlKey || e.metaKey) { return; }
var key = e.keyCode,
map = this._map,
offset;
if (key in this._panKeys) {
if (map._panAnim && map._panAnim._inProgress) { return; }
offset = this._panKeys[key];
if (e.shiftKey) {
offset = toPoint(offset).multiplyBy(3);
}
map.panBy(offset);
if (map.options.maxBounds) {
map.panInsideBounds(map.options.maxBounds);
}
} else if (key in this._zoomKeys) {
map.setZoom(map.getZoom() + (e.shiftKey ? 3 : 1) * this._zoomKeys[key]);
} else if (key === 27 && map._popup && map._popup.options.closeOnEscapeKey) {
map.closePopup();
} else {
return;
}
stop(e);
}
});
// @section Handlers
// @section Handlers
// @property keyboard: Handler
// Keyboard navigation handler.
Map.addInitHook('addHandler', 'keyboard', Keyboard);
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