topo2NodePosition.js
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/*
* Copyright 2016-present Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
ONOS GUI -- Topology Node Position Module.
Module that helps position nodes in the topology
*/
(function () {
'use strict';
// Injected vars
var rs, t2mcs;
// Internal state;
var nearDist = 15;
function positionNode(node, forUpdate) {
var meta = node.get('metaUi'),
x = meta && meta.x,
y = meta && meta.y,
dim = [800, 600],
xy;
// If the device contains explicit LONG/LAT data, use that to position
if (setLongLat(node)) {
// Indicate we want to update cached meta data...
return true;
}
// else if we have [x,y] cached in meta data, use that...
if (x !== undefined && y !== undefined) {
node.fixed = true;
node.px = node.x = x;
node.py = node.y = y;
return;
}
// if this is a node update (not a node add).. skip randomizer
if (forUpdate) {
return;
}
// Note: Placing incoming unpinned nodes at exactly the same point
// (center of the view) causes them to explode outwards when
// the force layout kicks in. So, we spread them out a bit
// initially, to provide a more serene layout convergence.
// Additionally, if the node is a host, we place it near
// the device it is connected to.
function rand() {
return {
x: rs.randDim(dim[0]),
y: rs.randDim(dim[1])
};
}
function near(node) {
return {
x: node.x + nearDist + rs.spread(nearDist),
y: node.y + nearDist + rs.spread(nearDist)
};
}
function getDevice(cp) {
return rand();
}
xy = (node.class === 'host') ? near(getDevice(node.cp)) : rand();
if (node.class === 'sub-region') {
xy = rand();
node.x = node.px = xy.x;
node.y = node.py = xy.y;
}
angular.extend(node, xy);
}
function setLongLat(el) {
var loc = el.get('location'),
coord;
if (loc && loc.type === 'lnglat') {
if (loc.lat === 0 && loc.lng === 0) {
return false;
}
coord = coordFromLngLat(loc);
el.fixed = true;
el.x = el.px = coord[0];
el.y = el.py = coord[1];
return true;
}
}
function coordFromLngLat(loc) {
var p = t2mcs.projection();
return p ? p([loc.lng, loc.lat]) : [0, 0];
}
angular.module('ovTopo2')
.factory('Topo2NodePositionService',
['RandomService',
function (_rs_, _t2mcs_) {
rs = _rs_;
t2mcs = _t2mcs_;
return {
positionNode: positionNode,
setLongLat: setLongLat
};
}
]);
})();