60 lines
1.3 KiB
JavaScript
60 lines
1.3 KiB
JavaScript
|
/**
|
||
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This source code is licensed under the BSD-style license found in the
|
||
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
||
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
||
|
|
*
|
||
|
|
* @providesModule resolveBoxStyle
|
||
|
|
* @flow
|
||
|
|
*/
|
||
|
|
'use strict';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Resolve a style property into it's component parts, e.g.
|
||
|
|
*
|
||
|
|
* resolveProperties('margin', {margin: 5, marginBottom: 10})
|
||
|
|
* ->
|
||
|
|
* {top: 5, left: 5, right: 5, bottom: 10}
|
||
|
|
*
|
||
|
|
* If none are set, returns false.
|
||
|
|
*/
|
||
|
|
function resolveBoxStyle(prefix: string, style: Object): ?Object {
|
||
|
|
var res = {};
|
||
|
|
var subs = ['top', 'left', 'bottom', 'right'];
|
||
|
|
var set = false;
|
||
|
|
subs.forEach(sub => {
|
||
|
|
res[sub] = style[prefix] || 0;
|
||
|
|
});
|
||
|
|
if (style[prefix]) {
|
||
|
|
set = true;
|
||
|
|
}
|
||
|
|
if (style[prefix + 'Vertical']) {
|
||
|
|
res.top = res.bottom = style[prefix + 'Vertical'];
|
||
|
|
set = true;
|
||
|
|
}
|
||
|
|
if (style[prefix + 'Horizontal']) {
|
||
|
|
res.left = res.right = style[prefix + 'Horizontal'];
|
||
|
|
set = true;
|
||
|
|
}
|
||
|
|
subs.forEach(sub => {
|
||
|
|
var val = style[prefix + capFirst(sub)];
|
||
|
|
if (val) {
|
||
|
|
res[sub] = val;
|
||
|
|
set = true;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
if (!set) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
function capFirst(text) {
|
||
|
|
return text[0].toUpperCase() + text.slice(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = resolveBoxStyle;
|
||
|
|
|