qdoc: Fix issues in HelpProjectWriter

The code that generates Qt Help Project (.qhp) xml files was suffering
from multiple issues - mostly related to changes in Node inheritance
that were not reflected in HelpProjectWriter implementation.

 - We no longer have subtypes for page nodes. Therefore, selectors like
   'doc:example' were broken. Simplify the selector code but continue
   supporting the old notation.
 - Examples and basic QML/JS types were incorrectly dropped from the TOC.
 - Node::Union and Node::Struct were called 'Class' in the .qhp. Use the
   Generator::typeString() to fetch the correct type name for all types.
 - Require .qhp subprojects to have at least a title to avoid empty
   subsections in the TOC.

Add a test that covers the entire .qhp generation with different types
of subprojects defined.

Fixes: QTBUG-82671
Fixes: QTBUG-82674
Change-Id: I8fe4a8ad5fc6d58f86e0e9128e98c0b8c4ba4a6a
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/qdoc/generator.h b/src/qdoc/generator.h
index fd5fbbcef..f28432bd2 100644
--- a/src/qdoc/generator.h
+++ b/src/qdoc/generator.h
@@ -63,6 +63,7 @@ public:
     virtual void initializeGenerator();
     virtual void initializeFormat();
     virtual void terminateGenerator();
+    virtual QString typeString(const Node *node);
 
     QString fullDocumentLocation(const Node *node, bool useSubdir = false);
     QString linkForExampleFile(const QString &path, const Node *parent,
@@ -118,7 +119,6 @@ protected:
     virtual bool generateText(const Text &text, const Node *relative, CodeMarker *marker);
     virtual QString imageFileName(const Node *relative, const QString &fileBase);
     virtual int skipAtoms(const Atom *atom, Atom::AtomType type) const;
-    virtual QString typeString(const Node *node);
 
     static bool matchAhead(const Atom *atom, Atom::AtomType expectedAtomType);
     static QString outputPrefix(const Node *node);