qdoc: DocBook generator: Fix \headerfile generation

Header files were missing content when using the DocBook output format.

Fixes: QTBUG-84224
Change-Id: I625ff2a4b14d69f6df0f706cfd4fdbef2cd7fd7f
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
(cherry picked from commit 3297d012680e083b25a4740229f9fe77c4fdbc17)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

2 files changed, 75 insertions, 5 deletions

diff --git a/src/qdoc/docbookgenerator.cpp b/src/qdoc/docbookgenerator.cpp
index 3e4f03cf0..82893be97 100644
--- a/src/qdoc/docbookgenerator.cpp
+++ b/src/qdoc/docbookgenerator.cpp
@@ -2436,12 +2436,10 @@ void DocBookGenerator::generateCppReferencePage(Node *node)
     QString title;
     QString rawTitle;
     QString fullTitle;
-    const NamespaceNode *ns = nullptr;
     if (aggregate->isNamespace()) {
         rawTitle = aggregate->plainName();
         fullTitle = aggregate->plainFullName();
         title = rawTitle + " Namespace";
-        ns = static_cast<const NamespaceNode *>(aggregate);
     } else if (aggregate->isClass()) {
         rawTitle = aggregate->plainName();
         QString templateDecl = node->templateDecl();
@@ -2449,6 +2447,8 @@ void DocBookGenerator::generateCppReferencePage(Node *node)
             fullTitle = QString("%1 %2 ").arg(templateDecl, aggregate->typeWord(false));
         fullTitle += aggregate->plainFullName();
         title = rawTitle + QLatin1Char(' ') + aggregate->typeWord(true);
+    } else if (aggregate->isHeader()) {
+        title = fullTitle = rawTitle = aggregate->fullTitle();
     }
 
     QString subtitleText;
@@ -2479,8 +2479,10 @@ void DocBookGenerator::generateCppReferencePage(Node *node)
     }
 
     Sections sections(const_cast<Aggregate *>(aggregate));
-    SectionVector *sectionVector =
-            ns ? &sections.stdDetailsSections() : &sections.stdCppClassDetailsSections();
+    auto *sectionVector =
+            (aggregate->isNamespace() || aggregate->isHeader()) ?
+                    &sections.stdDetailsSections() :
+                    &sections.stdCppClassDetailsSections();
     SectionVector::ConstIterator section = sectionVector->constBegin();
     while (section != sectionVector->constEnd()) {
         bool headerGenerated = false;
diff --git a/tests/auto/qdoc/generatedoutput/expected_output/headerfile-docbook/testheader.xml b/tests/auto/qdoc/generatedoutput/expected_output/headerfile-docbook/testheader.xml
index f3461fb1a..afa0b20a3 100644
--- a/tests/auto/qdoc/generatedoutput/expected_output/headerfile-docbook/testheader.xml
+++ b/tests/auto/qdoc/generatedoutput/expected_output/headerfile-docbook/testheader.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <db:article xmlns:db="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" version="5.2" xml:lang="en">
 <db:info>
-<db:title></db:title>
+<db:title>&lt;TestHeader&gt; - Test Header</db:title>
 <db:productname>HeaderFile</db:productname>
 <db:titleabbrev>HeaderFile Reference Documentation</db:titleabbrev>
 <db:abstract>
@@ -19,4 +19,72 @@
 <db:section xml:id="details">
 <db:title>Detailed Description</db:title>
 </db:section>
+<db:section xml:id="type-documentation">
+<db:title>Type Documentation</db:title>
+<db:section xml:id="Globals-enum">
+<db:title>enum Globals</db:title>
+<db:enumsynopsis>
+<db:enumname>Globals</db:enumname>
+<db:synopsisinfo db:role="access">public</db:synopsisinfo>
+<db:synopsisinfo db:role="status">active</db:synopsisinfo>
+<db:synopsisinfo db:role="threadsafeness">unspecified</db:synopsisinfo>
+<db:synopsisinfo db:role="module">HeaderFile</db:synopsisinfo>
+<db:enumitem db:enumidentifier="Glo" db:enumvalue="0"/>
+<db:enumitem db:enumidentifier="Bal" db:enumvalue="1"/>
+</db:enumsynopsis>
+<db:informaltable>
+<db:thead>
+<db:tr>
+<db:th>Constant</db:th>
+<db:th>Description</db:th>
+</db:tr>
+</db:thead>
+<db:tr>
+<db:td>
+<db:para><db:code>Glo</db:code></db:para>
+</db:td>
+<db:td><db:code>0</db:code></db:td>
+</db:tr>
+<db:tr>
+<db:td>
+<db:para><db:code>Bal</db:code></db:para>
+</db:td>
+<db:td><db:code>1</db:code></db:td>
+</db:tr>
+</db:informaltable>
+</db:section>
+</db:section>
+<db:section xml:id="variable-documentation">
+<db:title>Variable Documentation</db:title>
+<db:section xml:id="globalVar-var">
+<db:title>const int globalVar</db:title>
+<db:fieldsynopsis>
+<db:type>const int</db:type>
+<db:varname>globalVar</db:varname>
+<db:synopsisinfo db:role="access">public</db:synopsisinfo>
+<db:synopsisinfo db:role="status">active</db:synopsisinfo>
+<db:synopsisinfo db:role="threadsafeness">unspecified</db:synopsisinfo>
+<db:synopsisinfo db:role="module">HeaderFile</db:synopsisinfo>
+</db:fieldsynopsis>
+<db:para>Global variable.</db:para>
+</db:section>
+</db:section>
+<db:section xml:id="function-documentation">
+<db:title>Function Documentation</db:title>
+<db:section xml:id="globalFunc">
+<db:title>void globalFunc()</db:title>
+<db:methodsynopsis>
+<db:void/>
+<db:methodname>globalFunc</db:methodname>
+<db:void/>
+<db:synopsisinfo db:role="meta">plain</db:synopsisinfo>
+<db:synopsisinfo db:role="signature">void globalFunc()</db:synopsisinfo>
+<db:synopsisinfo db:role="access">public</db:synopsisinfo>
+<db:synopsisinfo db:role="status">active</db:synopsisinfo>
+<db:synopsisinfo db:role="threadsafeness">unspecified</db:synopsisinfo>
+<db:synopsisinfo db:role="module">HeaderFile</db:synopsisinfo>
+</db:methodsynopsis>
+<db:para>Global function.</db:para>
+</db:section>
+</db:section>
 </db:article>