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index.js
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var postcss = require('postcss');
module.exports = postcss.plugin('postcss-flexadapter', function(opts){
opts = opts || {};
// 匹配所有版本的flex写法，并定义替换规则
var mappings = {
'display': {
rule: {
'flex':'display:-webkit-box; display:-moz-box; display:-ms-flexbox; display:-webkit-flex; display:flex',
'flexbox':'display:-webkit-box; display:-moz-box; display:-ms-flexbox; display:-webkit-flex; display:flex',
'box':'display:-webkit-box; display:-moz-box; display:-ms-flexbox; display:-webkit-flex; display:flex',
'inline-flex':'display:-webkit-inline-flex; display:-moz-inline-flex; display:-ms-inline-flex; display:inline-flex',
'inline-flexbox':'display:-webkit-inline-flexbox; display:-moz-inline-flexbox; display:-ms-inline-flexbox; display:inline-flexbox',
'inline-box':'display:-webkit-inline-box; display:-moz-inline-box; display:-ms-inline-box; display:inline-box'
}
},
'flex-direction': {
rule: {
'row':'-webkit-box-orient:horizontal; -moz-box-orient:horizontal; -webkit-box-direction:normal; -moz-box-direction:normal; -webkit-flex-direction:row; -moz-flex-direction:row; flex-direction:row',
'row-reverse':'-webkit-box-orient:horizontal; -moz-box-orient:horizontal; -webkit-box-direction:reverse; -moz-box-direction:reverse; -webkit-flex-direction:row-reverse; -ms-flex-direction:row-reverse; flex-direction:row-reverse',
'column':'-webkit-box-orient:vertical; -moz-box-orient:vertical; -webkit-box-direction:normal; -moz-box-direction:normal; -webkit-flex-direction:column; -ms-flex-direction:column; flex-direction:column',
'column-reverse':'-webkit-box-orient:vertical; -moz-box-orient:vertical; -webkit-box-direction:reverse; -moz-box-direction:reverse; -webkit-flex-direction:column-reverse; -ms-flex-direction:column-reverse; flex-direction:column-reverse'
}
},
'flex-wrap': {
rule:{
'nowrap':'-webkit-box-lines:single; box-lines:single; flex-wrap:-webkit-nowrap; flex-wrap:-ms-nowrap; flex-wrap:nowrap',
'wrap':'-webkit-box-lines:multiple; box-lines:multiple; flex-wrap:-webkit-wrap; flex-wrap:-ms-wrap; flex-wrap:wrap',
'wrap-reverse':'-webkit-flex-wrap:wrap-reverse; -ms-flex-wrap:wrap-reverse; flex-wrap:wrap-reverse'
}
},
'flex-flow': {
rule:{
'row nowrap':'-webkit-flex-flow:row nowrap; -ms-flex-flow:row nowrap; flex-flow:row nowrap',
'row wrap':'-webkit-flex-flow:row wrap; -ms-flex-flow:row wrap; flex-flow:row wrap',
'row wrap-reverse':'-webkit-flex-flow:row wrap-reverse; -ms-flex-flow:row wrap-reverse; flex-flow:row wrap-reverse',
'row-reverse nowrap':'-webkit-flex-flow:row-reverse nowrap; -ms-flex-flow:row-reverse nowrap; flex-flow:row-reverse nowrap',
'row-reverse wrap':'-webkit-flex-flow:row-reverse wrap; -ms-flex-flow:row-reverse wrap; flex-flow:row-reverse wrap',
'row-reverse wrap-reverse':'-webkit-flex-flow:row-reverse wrap-reverse; -ms-flex-flow:row-reverse wrap-reverse; flex-flow:row-reverse wrap-reverse',
'column nowrap':'-webkit-flex-flow:column nowrap; -ms-flex-flow:column nowrap; flex-flow:column nowrap',
'column wrap':'-webkit-flex-flow:column wrap; -ms-flex-flow:column wrap; flex-flow:column wrap',
'column wrap-reverse':'-webkit-flex-flow:column wrap-reverse; -ms-flex-flow:column wrap-reverse; flex-flow:column wrap-reverse',
'column-reverse nowrap':'-webkit-flex-flow:column-reverse nowrap; -ms-flex-flow:column-reverse nowrap; flex-flow:column-reverse nowrap',
'column-reverse wrap':'-webkit-flex-flow:column-reverse wrap; -ms-flex-flow:column-reverse wrap; flex-flow:column-reverse wrap',
'column-reverse wrap-reverse':'-webkit-flex-flow:column-reverse wrap-reverse; -ms-flex-flow:column-reverse wrap-reverse; flex-flow:column-reverse wrap-reverse'
}
},
'justify-content': {
rule:{
'flex-start':'-webkit-box-pack:start; -moz-box-pack:start; -ms-flex-pack:start; -webkit-justify-content:flex-start; justify-content:flex-start',
'flex-end':'-webkit-box-pack:end; -moz-box-pack:end; -ms-flex-pack:end; -webkit-justify-content:flex-end; justify-content:flex-end',
'center':'-webkit-box-pack:center; -moz-box-pack:center; -ms-flex-pack:center; -webkit-justify-content:center; justify-content:center',
'space-between':'-webkit-box-pack:justify; -moz-box-pack:justify; -ms-flex-pack:justify; -webkit-justify-content:space-between; justify-content:space-between',
'space-around':'-webkit-box-pack:justify; -moz-box-pack:justify; -ms-flex-pack:distribute; -webkit-justify-content:space-around; justify-content:space-around'
}
},
'align-items': {
rule:{
'flex-start':'-webkit-box-align:start; -moz-box-align:start; -ms-flex-align:start; -webkit-align-items:flex-start; align-items:flex-start',
'flex-end':'-webkit-box-align:end; -moz-box-align:end; -ms-flex-align:end; -webkit-align-items:flex-end; align-items:flex-end',
'center':'-webkit-box-align:center; -moz-box-align:center; -ms-flex-align:center; -webkit-align-items:center; align-items:center',
'baseline':'-webkit-box-align:baseline; -moz-box-align:baseline; -ms-flex-align:baseline; -webkit-align-items:baseline; align-items:baseline',
'stretch':'-webkit-box-align:stretch; -moz-box-align:stretch; -ms-flex-align:stretch; -webkit-align-items:stretch; align-items:stretch'
}
},
'align-content': {
rule:{
'flex-start':'-ms-flex-line-pack:start; flex-line-pack:start; -webkit-align-content:flex-start; align-content:flex-start',
'flex-end':'-ms-flex-line-pack:end; flex-line-pack:end; -webkit-align-content:flex-end; align-content:flex-end',
'center':'-ms-flex-line-pack:center; flex-line-pack:center; -webkit-align-content:center; align-content:center',
'space-between':'-ms-flex-line-pack:justify; flex-line-pack:justify; -webkit-align-content:space-between; align-content:space-between',
'space-around':'-ms-flex-line-pack:distribute; flex-line-pack:distribute; -webkit-align-content:space-around; align-content:space-around',
'stretch':'-ms-flex-line-pack:stretch; flex-line-pack:stretch; -webkit-align-content:stretch; align-content:stretch'
}
},
'align-self': {
rule:{
'auto':'-webkit-flex-item-align:auto; -ms-flex-item-align:auto; flex-item-align:auto; -webkit-align-self:auto; -ms-align-self:auto; align-self:auto',
'flex-start':'-webkit-flex-item-align:start; -ms-flex-item-align:start; flex-item-align:start; -webkit-align-self:flex-start; -ms-align-self:flex-start; align-self:flex-start',
'flex-end':'-webkit-flex-item-align:end; -ms-flex-item-align:end; flex-item-align:end; -webkit-align-self:flex-end; -ms-align-self:flex-end; align-self:flex-end',
'center':'-webkit-flex-item-align:center; -ms-flex-item-align:center; flex-item-align:center; -webkit-align-self:center; -ms-align-self:center; align-self:center',
'baseline':'-webkit-flex-item-align:baseline; -ms-flex-item-align:baseline; flex-item-align:baseline; -webkit-align-self:baseline; -ms-align-self:baseline; align-self:baseline',
'stretch':'-webkit-flex-item-align:stretch; -ms-flex-item-align:stretch; flex-item-align:stretch; -webkit-align-self:stretch; -ms-align-self:stretch; align-self:stretch'
}
},
// 数字形式复制赋值，声明为num
'order': {
rule:{
'num':'-webkit-flex-order:; -ms-flex-order:; flex-order:; -webkit-order:; order:'
}
},
'flex-order': {
rule:{
'num':'-webkit-flex-order:; -ms-flex-order:; flex-order:; -webkit-order:; order:'
}
},
'flex-grow': {
rule:{
'num':'-webkit-box-flex:; -moz-box-flex:; -webkit-flex-grow:; -ms-flex-grow:; flex-grow:'
}
},
'box-flex': {
rule:{
'num':'-webkit-box-flex:; -moz-box-flex:; -webkit-flex-grow:; -ms-flex-grow:; flex-grow:'
}
},
'flex': {
rule:{
'num':'-webkit-box-flex:; -moz-box-flex:; -webkit-flex-grow:; -ms-flex-grow:; flex-grow:'
}
},
'flex-shrink': {
rule:{
'num':'-webkit-flex-shrink:; flex-shrink:'
}
},
'flex-basis': {
rule:{
'num':'-webkit-flex-basis:; flex-basis:'
}
}
}
return function (css, result) {
css.walkDecls(function (decl) {
var FLAGS_IS_NUM = false, parent = decl.parent, _decl = decl, end_child_index = 0;
// 匹配并修改属性
if ( decl.prop in mappings ) {
// 过滤重复值
parent.walkDecls(decl.prop,function(_decl){
end_child_index = parent.index(_decl);
});
_decl.prop = postcss.vendor.unprefixed(parent.nodes[end_child_index].prop);
_decl.value = postcss.vendor.unprefixed(parent.nodes[end_child_index].value);
// 判断是否值为数字
FLAGS_IS_NUM = ((typeof mappings[_decl.prop].rule['num'])== "undefined")?false:true;
if ( _decl.value in mappings[_decl.prop].rule || FLAGS_IS_NUM ) {
var prop_ary, _prop ,_val;
if(!FLAGS_IS_NUM){
prop_ary = mappings[_decl.prop].rule[_decl.value].replace(/(^\s+)|(\s+$)/g,'').split(';');
}
else{
prop_ary = mappings[_decl.prop].rule['num'].replace(/(^\s+)|(\s+$)/g,'').split(';');
}
// 过滤重复值
parent.walkDecls(_decl.prop,function(_mydecl){
_mydecl.remove();
});
for(var i = prop_ary.length-1; i > -1; i--){
_prop = prop_ary[i].split(':')[0];
if(FLAGS_IS_NUM){
_val = _decl.value;
}
else{
_val = prop_ary[i].split(':')[1];
}
parent.prepend({prop: _prop, value: _val});
}
}
}
});
};
});