Incremental Layouts and Actions

Actions are leveraged by the layout framework to include widgets inside layouts dynamically, benefiting from sorting and filtering features of actions within layouts.

Configuration is a bit overkill for now; this could be simplified in the future, but the main principle is to:

1. Define a layout including action widgets.
2. Define action widgets referencing an action category (depending on the use case).
3. Define actions with type widget within this category, referencing a widget name.
4. Define widgets with corresponding names.

Here is a complete example, taken from the default Nuxeo Summary layout, and showing how some widgets are shown conditionally on the page.

<extension target="org.nuxeo.ecm.platform.forms.layout.WebLayoutManager"
  point="layouts">
  <layout name="grid_summary_layout">
    <templates>
      <template mode="any">
        /layouts/layout_grid_template.xhtml
      </template>
    </templates>
    <rows>
      <row>
        <properties mode="any">
          <property name="nxl_gridStyleClass_0">gridStyle12</property>
        </properties>
        <widget>summary_panel_top</widget>
      </row>
      <row>
        <properties mode="any">
          <property name="nxl_gridStyleClass_0">gridStyle7</property>
          <property name="nxl_gridStyleClass_1">gridStyle5</property>
        </properties>
        <widget>summary_panel_left</widget>
        <widget>summary_panel_right</widget>
      </row>
      <row>
        <properties mode="any">
          <property name="nxl_gridStyleClass_0">gridStyle12</property>
        </properties>
        <widget>summary_panel_bottom</widget>
      </row>
    </rows>
  </layout>
</extension>

This layout is using a grid, so that widgets are piled up within grid slots and stacked up correctly when some widgets are not displayed.

Let's look at the summary_panel_left widget configuration:

<extension target="org.nuxeo.ecm.platform.forms.layout.WebLayoutManager"
  point="widgets">
  <widget name="summary_panel_left" type="documentActions">
    <handlingLabels>true</handlingLabels>
    <labels>
      <label mode="any"></label>
    </labels>
    <properties widgetMode="any">
      <property name="category">SUMMARY_PANEL_LEFT</property>
      <property name="subStyleClass">summaryActions</property>
    </properties>
  </widget>
</extension>

Actions can be displayed by this widget when using the category SUMMARY_PANEL_LEFT. Here is a sample action configuration:

<extension target="org.nuxeo.ecm.platform.actions.ActionService"
  point="actions">
  <action id="summary_note_text" type="widget" order="100">
    <category>SUMMARY_PANEL_LEFT</category>
    <properties>
      <property name="widgetName">summary_note_text</property>
    </properties>
    <filter-id>hasNote</filter-id>
  </action>
</extension>

This action is using the type widget, referencing the widget named summary_note_text. Note that it's also using a filter that makes sure the widget will be shown only when the document has a schema named note:

<extension target="org.nuxeo.ecm.platform.actions.ActionService"
  point="filters">
  <filter id="hasNote">
    <rule grant="true">
      <schema>note</schema>
    </rule>
  </filter>
</extension>

Finally, here is the widget configuration:

<extension target="org.nuxeo.ecm.platform.forms.layout.WebLayoutManager"
  point="widgets">
  <widget name="summary_note_text" type="richtext_with_mimetype">
    <fields>
      <field>note:note</field>
      <field>note:mime_type</field>
    </fields>
    <properties mode="view">
      <property name="translatedHtml">
        #{noteActions.translateImageLinks(field_0)}
      </property>
      <property name="cssClass">note_content_block</property>
    </properties>
    <controls mode="any">
      <control name="requireSurroundingForm">true</control>
    </controls>
  </widget>
</extension>

Note that the widget holds a control to make sure a form is added around it: the summary layout is not surrounded by a form since version 5.8 to allow defining fine-grained forms inside it.