装饰 Grails 标签
Grails bean fields 插件提供的 taglib 使用命名约定来确定标签键应该用于它生成的每个 元素。我想更改此约定的详细信息，而不直接更改插件的源代码。
我正在考虑的方法是创建我自己的标签库
class MyBeanTagLib {
static namespace = 'mybean'
private void setLabelKey (attrs) {
if (!attrs.labelKey) {
// in reality calculation of the default key is a bit more complicated :)
attrs.labelKey = 'my.default.key'
}
return attrs
}
// renders a combo box
def select = { attrs ->
attrs = setLabelKey(attrs)
// Now call the bean-fields select tag, passing along attrs
}
// renders a datePicker
def date = { attrs -
attrs = setLabelKey(attrs)
// Now call the bean-fields date tag, passing along attrs
}
}
我的第一个问题是如何调用我试图装饰的标签。换句话说，应该用什么代码来替换注释
// 现在调用 bean-fields...
我可以这样做：
new BeanTagLib().select(attrs)
但我怀疑这是从另一个标签库调用一个标签库的正确方法。
其次，还有比这更优雅的方式来装饰标签库吗？实际上，我需要装饰的标签不仅仅是 select 和 date，而且每个装饰标签中的代码几乎是相同的。如果可能的话，我想消除这种重复？
The taglib provided by the Grails bean fields plugin uses a naming convention to determine the label key that should be used for each <input> element it generates. I would like to change the details of this convention without changing the plugin's source code directly.
The approach I'm considering is to create my own tag lib
class MyBeanTagLib {
static namespace = 'mybean'
private void setLabelKey (attrs) {
if (!attrs.labelKey) {
// in reality calculation of the default key is a bit more complicated :)
attrs.labelKey = 'my.default.key'
}
return attrs
}
// renders a combo box
def select = { attrs ->
attrs = setLabelKey(attrs)
// Now call the bean-fields select tag, passing along attrs
}
// renders a datePicker
def date = { attrs -
attrs = setLabelKey(attrs)
// Now call the bean-fields date tag, passing along attrs
}
}
My first question is how to invoke the tag I'm trying to decorate. In other words, what code should replace the comment
// Now call the bean-fields...
I could do this:
new BeanTagLib().select(attrs)
But I doubt this is the correct way to invoke one taglib from another.
Secondly, is there a more elegant way to decorate a taglib than this? In reality there are a lot more tags than just select and date that I need to decorate and the code in each decorating tag will be almost identical. I'd like to eliminate this duplication if possible?
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通过名称空间调用其他标签库的标签，例如
g.link([controller: 'one'], { 'link text' })或bean.select(attrs).您可以尝试在您的taglib 并返回正确的闭包 - 我不确定。
Invoke other taglibs' tags by their namespace, like
g.link([controller: 'one'], { 'link text' }), orbean.select(attrs).You can try writing
getPropertyin your taglib and return proper closures - I'm not sure.