qdoc: Do not generate tags from titles anymore

Qt Creator nowadays searches itself for matches in the title and
description, so no point in automatically generating tags from titles
anymore.

Change-Id: I4aa9912f7bb6dd293b5de8ebff7e751956e6856d
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>
(cherry picked from commit f3c96dc9fd0dce00df7ae60f9a1c4ba86eaa2d70)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

5 files changed, 4 insertions, 47 deletions

diff --git a/src/qdoc/manifestwriter.cpp b/src/qdoc/manifestwriter.cpp
index 3d3d9e86a..571128c71 100644
--- a/src/qdoc/manifestwriter.cpp
+++ b/src/qdoc/manifestwriter.cpp
@@ -266,8 +266,6 @@ void ManifestWriter::generateManifestFile(const QString &manifest, const QString
         warnAboutUnusedAttributes(usedAttributes.keys(), example);
         writeDescription(&writer, example);
         addWordsFromModuleNamesAsTags();
-        addTitleWordsToTags(example);
-        cleanUpTags();
         writeTagsElement(&writer);
 
         const QString exampleName = example->name().mid(example->name().lastIndexOf('/') + 1);
@@ -305,45 +303,6 @@ void ManifestWriter::writeTagsElement(QXmlStreamWriter *writer)
 /*!
     \internal
 
-    Clean up tags, exclude invalid and common words.
- */
-void ManifestWriter::cleanUpTags()
-{
-    QSet<QString> cleanedTags;
-
-    for (auto tag : m_tags) {
-        // strip punctuation characters from start and end
-        while (!tag.isEmpty() && tag.at(0).isPunct())
-            tag.remove(0, 1);
-        while (!tag.isEmpty() && tag.back().isPunct())
-            tag.chop(1);
-
-        if (tag.length() < 2 || tag.at(0).isDigit()
-            || tag == QLatin1String("qt") || tag == QLatin1String("the")
-            || tag == QLatin1String("and") || tag == QLatin1String("doc")
-            || tag.startsWith(QLatin1String("example")) || tag.startsWith(QLatin1String("chapter")))
-            continue;
-        cleanedTags << tag;
-    }
-    m_tags = cleanedTags;
-}
-
-/*!
-    \internal
-
-    Add the example's title as tags.
- */
-void ManifestWriter::addTitleWordsToTags(const ExampleNode *example)
-{
-    Q_ASSERT(example);
-
-    const auto &titleWords = example->title().toLower().split(QLatin1Char(' '));
-    m_tags += QSet<QString>(titleWords.cbegin(), titleWords.cend());
-}
-
-/*!
-    \internal
-
     Add words from module name as tags
     QtQuickControls -> qt,quick,controls
     QtOpenGL -> qt,opengl
diff --git a/src/qdoc/manifestwriter.h b/src/qdoc/manifestwriter.h
index 75e78ed27..fc6392afd 100644
--- a/src/qdoc/manifestwriter.h
+++ b/src/qdoc/manifestwriter.h
@@ -62,10 +62,8 @@ private:
     QDocDatabase *m_qdb { nullptr };
     QList<ManifestMetaFilter> m_manifestMetaContent {};
 
-    void addTitleWordsToTags(const ExampleNode *example);
     void addWordsFromModuleNamesAsTags();
     void includeTagsAddedWithMetaCommand(const ExampleNode *example);
-    void cleanUpTags();
     void writeTagsElement(QXmlStreamWriter *writer);
     template <typename F>
     void processManifestMetaContent(const QString &fullName, F matchFunc);
diff --git a/tests/auto/qdoc/generatedoutput/expected_output/demos-manifest.xml b/tests/auto/qdoc/generatedoutput/expected_output/demos-manifest.xml
index 60da1bca7..5cbdf3f62 100644
--- a/tests/auto/qdoc/generatedoutput/expected_output/demos-manifest.xml
+++ b/tests/auto/qdoc/generatedoutput/expected_output/demos-manifest.xml
@@ -3,7 +3,7 @@
     <demos>
         <demo docUrl="qthelp://org.qt-project.test.001/test/test-demos-demo-example.html" imageUrl="qthelp://org.qt-project.test.001/test/images/leonardo-da-vinci.png" isTest="true" name="Demo" projectPath="test/demos/demo/demo.pro">
             <description><![CDATA[No description available]]></description>
-            <tags>demo,test</tags>
+            <tags>test</tags>
         </demo>
     </demos>
 </instructionals>
diff --git a/tests/auto/qdoc/generatedoutput/expected_output/examples-manifest.xml b/tests/auto/qdoc/generatedoutput/expected_output/examples-manifest.xml
index 4d8a61cfb..bbce463eb 100644
--- a/tests/auto/qdoc/generatedoutput/expected_output/examples-manifest.xml
+++ b/tests/auto/qdoc/generatedoutput/expected_output/examples-manifest.xml
@@ -3,12 +3,12 @@
     <examples>
         <example docUrl="qthelp://org.qt-project.test.001/test/test-cmaketest-example.html" imageUrl="qthelp://org.qt-project.test.001/test/images/leonardo-da-vinci.png" isTest="true" name="CMake Example Project" projectPath="test/cmaketest/CMakeLists.txt">
             <description><![CDATA[No description available]]></description>
-            <tags>cmake,project,test</tags>
+            <tags>test</tags>
             <fileToOpen mainFile="true">test/cmaketest/main.cpp</fileToOpen>
         </example>
         <example docUrl="qthelp://org.qt-project.test.001/test/test-componentset-example.html" isTest="true" name="QML Documentation Example" projectPath="tutorials/componentset/componentset.pro">
             <description><![CDATA[Example for documenting QML types.]]></description>
-            <tags>documentation,qml,sample,test</tags>
+            <tags>sample,test</tags>
             <fileToOpen mainFile="true">tutorials/componentset/componentset.qml</fileToOpen>
         </example>
     </examples>
diff --git a/tests/auto/qdoc/generatedoutput/testdata/qml/componentset/examples.qdoc b/tests/auto/qdoc/generatedoutput/testdata/qml/componentset/examples.qdoc
index 9c499713d..9ca0db891 100644
--- a/tests/auto/qdoc/generatedoutput/testdata/qml/componentset/examples.qdoc
+++ b/tests/auto/qdoc/generatedoutput/testdata/qml/componentset/examples.qdoc
@@ -32,7 +32,7 @@
 
     \testnoautolist
 
-    \meta tag {test,sample,(Qt)}
+    \meta tag {test,sample}
     \meta installpath tutorials
 
     This example demonstrates one of the ways to document QML types. It also