Support more slots, including custom slotting

[Shrine-XSLT] / transform.xslt

diff --git a/transform.xslt b/transform.xslt
index 20fe4c29b354fa5166cba66c9a17e9c3647f2829..e8ecb3d55fe1ec7047b7c20eb7319673d2a49aca 100644 (file)
--- a/transform.xslt
+++ b/transform.xslt
@@ -1,6 +1,6 @@
 <!--
-This is an extremely simple XSLT transform which simply reads in a
-`template.xml` and :—
+This is a⸠n extremely simple⸡ progressively‐less‐simple X·S·L·T
+transform which simply reads in a `template.xml` and :—
 
 • Replaces the `<html:shrine-content>` element with the content of the document it is being applied to,
 
@@ -124,7 +124,7 @@ If a copy of the MPL was not distributed with this file, You can obtain one at h
        <!--
                Process template text; just make a copy.
        -->
-       <xslt:template match="text()" mode="content">
+       <xslt:template match="text()" mode="template">
                <xslt:copy/>
        </xslt:template>
 
@@ -169,32 +169,61 @@ If a copy of the MPL was not distributed with this file, You can obtain one at h
        </xslt:template>
 
        <!--
-               Process the template header.
-               Read the `@data-header` attribute of the root element, append `"-header.xml"` to the end of it, and process the resulting document.
-               If no `@data-header` attribute is provided, no header is rendered.
+               Process the template header and footer.
+               Read the corresponding `@data-header` or `@data-footer` attribute of the root element, append `"-header.xml"` or `"-footer.xml"` to the end of it, and process the resulting document.
+               If no `@data-header` or `@data-footer` attribute is provided, nothing is rendered.
        -->
-       <xslt:template match="html:shrine-header" mode="template">
-               <xslt:for-each select="$source/*/@data-shrine-header">
-                       <xslt:apply-templates select="document(concat('./', ., '-header.xml'), $template)/*" mode="content"/>
-               </xslt:for-each>
+       <xslt:template match="html:shrine-header|html:shrine-footer" mode="template">
+               <xslt:param name="context" select="'shrine-template'"/>
+               <xslt:variable name="kind" select="substring-after(local-name(), 'shrine-')"/>
+               <xslt:choose>
+                       <xslt:when test="$context='shrine-template'">
+                               <xslt:for-each select="$source/*/@*[name()=concat('data-shrine-', $kind)]">
+                                       <xslt:for-each select="document(concat('./', ., '-', $kind, '.xml'), $template)/*">
+                                               <xslt:element name="{local-name()}">
+                                                       <xslt:for-each select="@*">
+                                                               <xslt:copy/>
+                                                       </xslt:for-each>
+                                                       <xslt:for-each select="$source//*[@slot=concat('shrine-', $kind, '-before')]">
+                                                               <xslt:apply-templates select="." mode="content"/>
+                                                       </xslt:for-each>
+                                                       <xslt:apply-templates mode="template">
+                                                               <xslt:with-param name="context" select="concat('shrine-', $kind)"/>
+                                                       </xslt:apply-templates>
+                                                       <xslt:for-each select="$source//*[@slot=concat('shrine-', $kind, '-after')]">
+                                                               <xslt:apply-templates select="." mode="content"/>
+                                                       </xslt:for-each>
+                                               </xslt:element>
+                                       </xslt:for-each>
+                               </xslt:for-each>
+                       </xslt:when>
+                       <xslt:otherwise>
+                               <xslt:element name="{local-name()}">
+                                       <xslt:for-each select="@*">
+                                               <xslt:copy/>
+                                       </xslt:for-each>
+                                       <xslt:apply-templates mode="template"/>
+                               </xslt:element>
+                       </xslt:otherwise>
+               </xslt:choose>
        </xslt:template>
 
        <!--
-               Process the template footer.
-               Read the `@data-footer` attribute of the root element, append `"-footer.xml"` to the end of it, and process the resulting document.
-               If no `@data-footer` attribute is provided, no footer is rendered.
+               Process the content.
        -->
-       <xslt:template match="html:shrine-footer" mode="template">
-               <xslt:for-each select="$source/*/@data-shrine-footer">
-                       <xslt:apply-templates select="document(concat('./', ., '-footer.xml'), $template)/*" mode="content"/>
-               </xslt:for-each>
+       <xslt:template match="html:shrine-content" mode="template">
+               <xslt:apply-templates select="$source/*" mode="content"/>
        </xslt:template>
 
        <!--
-               Process the content.
+               Process miscellaneous template slots.
        -->
-       <xslt:template match="html:shrine-content" mode="template">
-               <xslt:apply-templates select="$source/*" mode="content"/>
+       <xslt:template match="html:slot[not(ancestor::html:template)]" mode="template">
+               <xslt:param name="context" select="'shrine-template'"/>
+               <xslt:variable name="name" select="string(@name)"/>
+               <xslt:for-each select="$source//*[@slot=concat($context, '-slot-', $name)]">
+                       <xslt:apply-templates select="." mode="content"/>
+               </xslt:for-each>
        </xslt:template>
 
        <!--