coldfusion - 用于文件自定义的自定义 CFInclude

Question

我们的代码库包含大量以下示例，因为我们允许根据客户的个人需求自定义许多基页。

<cfif fileExists("/custom/someFile.cfm")>
    <cfinclude template="/custom/someFile.cfm" />
<cfelse>
    <cfinclude template="someFile.cfm" />
</cfif>

我想创建一个自定义 CF 标签，将其样板化为一个简单的 <cf_custominclude template="someFile.cfm" /> ，但是我遇到了这样一个事实，即自定义标签实际上是黑盒，因此它们不会引入标签开始之前存在的局部变量，而且我无法引用由于标签而创建的任何变量从导入文件。

例如

<!--- This is able to use someVar --->
<!--- Pulls in some variable named "steve" --->
<cfinclude template="someFile.cfm" />
<cfdump var="#steve#" /> <!--- This is valid, however... --->

<!--- someVar is undefined for this --->
<!--- Pulls in steve2 --->
<cf_custominclude template="someFile.cfm" />
<cfdump var="#steve2#" /> <!--- This isn't valid as steve2 is undefined. --->

是否有解决此问题的方法，或者我应该利用其他一些语言功能来实现我的目标？

Answer 1

好吧，我完全质疑这样做，但我知道我们有时都会收到我们必须处理的代码，并且努力让人们重构。

这应该可以满足您的要求。需要注意的一件重要事情是，您需要确保您的自定义标签有一个结束符，否则它将不起作用!只需使用简化的关闭，就像上面那样:

<cf_custominclude template="someFile.cfm" />

这应该可以解决问题，称它为您拥有它:custominclude.cfm

<!--- executes at start of tag --->
<cfif thisTag.executionMode eq 'Start'>
    <!--- store a list of keys we don't want to copy, prior to including template --->
    <cfset thisTag.currentKeys = structKeyList(variables)>
    <!--- control var to see if we even should bother copying scopes --->
    <cfset thisTag.includedTemplate = false>
    <!--- standard include here --->
    <cfif fileExists(expandPath(attributes.template))>
        <cfinclude template="#attributes.template#">
        <!--- set control var / flag to copy scopes at close of tag --->
        <cfset thisTag.includedTemplate = true>
    </cfif>
 </cfif>
 <!--- executes at closing of tag --->
 <cfif thisTag.executionMode eq 'End'>
    <!--- if control var / flag set to copy scopes --->
    <cfif thisTag.includedTemplate>
        <!--- only copy vars created in the included page --->
        <cfloop list="#structKeyList(variables)#" index="var">
            <cfif not listFindNoCase(thisTag.currentKeys, var)>
                <!--- copy from include into caller scope --->
                <cfset caller[var] = variables[var]>
            </cfif>
        </cfloop>
    </cfif>
 </cfif>

我测试了它，它工作正常，嵌套也应该工作正常。祝你好运!

<!--- Pulls in steve2 var from include --->
<cf_custominclude template="someFile.cfm" />
<cfdump var="#steve2#" /> <!--- works! --->