Confluence Macro Browser autocompletion for attachments - plugins

Question

I am trying to show all attachments (from the current page) in an auto-completed drop-down list. This is the part in the atlassian-plugin.xml which defines the parameters:
<xhtml-macro name="plugin-name" class="com.example.macro.name" key="macroname-xhtml" icon="/download/resources/${project.groupId}.${project.artifactId}/icons/macroname.png">
<category name="formatting"/>
<parameters>
<parameter name="content_input" type="confluence-content" />
<parameter name="space_input" type="spacekey" />
<parameter name="attachment_input" type="attachment" />
</parameters>
</xhtml-macro>
The confluence-content and spacekey types work just fine. It shows a textfield which autocompletes Pages and Spaces.
However, the attachment type shows a empty drop-down list (select box) which cannot auto-complete.
The official Confluence documentation says it should work like I do:
https://developer.atlassian.com/display/CONFDEV/Including+Information+in+your+Macro+for+the+Macro+Browser
I must be missing something here, but I don't know what. Anyone might know what the problem is?

Answer 1

If you want a drop-down list with all the attachments then you may also try the following:
<xhtml-macro name="plugin-name" class="com.example.macro.name" key="macroname-xhtml" icon="/download/resources/${project.groupId}.${project.artifactId}/icons/macroname.png">
<category name="confluence-content" />
<parameters>
<parameter name="page" type="confluence-content" required="false"
multiple="false" />
<parameter name="name" type="attachment" required="false" />
</parameters>
</xhtml-macro>
Don't change the names of the parameters
If you want to add a filter, then you need the following:
<web-resource key="macro-browser-smart-fields" name="Macro Browser Smart Fields">
<resource type="download" name="confluence-core-macro-fields.js" location="js/confluence-core-macro-fields.js" />
<dependency>confluence.editor.actions:editor-macro-browser</dependency>
<context>macro-browser</context>
</web-resource>
confluence-core-macro-fields.js
(function($) {
AJS.MacroBrowser.activateSmartFieldsAttachmentsOnPage("plugin-name", [ "png", "jpg", "gif" ]);
})(AJS.$);

Answer 2

I found that setting the type as attachment (following official documentation) is bugged. I have found a work-around to display attachments in a auto-complete box.
<parameter name="xsd" type="confluence-content" required="true">
<option key="type" value="attachment"/>
<option key="showKeyInPlaceholder" value="false" />
<option key="showValueInPlaceholder" value="true" />
</parameter>