ClangCodeModel: Support setting additional preprocessor directives

... for a document.
This was only ever implemented for the built-in code model.

Fixes: QTCREATORBUG-20423
Change-Id: Ia99d0136e9995a5626058ad06173ea077be024d8
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/clangcodemodel/clangdclient.cpp

@@ -335,7 +335,7 @@ ClangdClient::ClangdClient(Project *project, const Utils::FilePath &jsonDbDir)
                 = CppEditor::ClangdSettings(d->settings).clangdIncludePath();
         CppEditor::CompilerOptionsBuilder optionsBuilder = clangOptionsBuilder(
                     *CppEditor::CppModelManager::instance()->fallbackProjectPart(),
-                    warningsConfigForProject(nullptr), includeDir);
+                    warningsConfigForProject(nullptr), includeDir, {});
         const CppEditor::UsePrecompiledHeaders usePch = CppEditor::getPchUsage();
         const QJsonArray projectPartOptions = fullProjectPartOptions(
                     optionsBuilder, globalClangOptions());
@@ -714,23 +714,26 @@ void ClangdClient::handleUiHeaderChange(const QString &fileName)
 void ClangdClient::updateParserConfig(const Utils::FilePath &filePath,
         const CppEditor::BaseEditorDocumentParser::Configuration &config)
 {
-    if (config.preferredProjectPartId.isEmpty())
-        return;
-
-    CppEditor::BaseEditorDocumentParser::Configuration &cachedConfig = d->parserConfigs[filePath];
-    if (cachedConfig == config)
-        return;
-    cachedConfig = config;
-
-    // TODO: Also handle editorDefines (and usePrecompiledHeaders?)
-    const auto projectPart = CppEditor::CppModelManager::instance()
-            ->projectPartForId(config.preferredProjectPartId);
+    // TODO: Also handle usePrecompiledHeaders?
+    const auto projectPart = !config.preferredProjectPartId.isEmpty()
+            ? CppEditor::CppModelManager::instance()->projectPartForId(
+                  config.preferredProjectPartId)
+            : projectPartForFile(filePath.toString());
     if (!projectPart)
         return;
+
+    CppEditor::BaseEditorDocumentParser::Configuration fullConfig = config;
+    fullConfig.preferredProjectPartId = projectPart->id();
+    CppEditor::BaseEditorDocumentParser::Configuration &cachedConfig = d->parserConfigs[filePath];
+    if (cachedConfig == fullConfig)
+        return;
+    cachedConfig = fullConfig;
+
     QJsonObject cdbChanges;
     const Utils::FilePath includeDir = CppEditor::ClangdSettings(d->settings).clangdIncludePath();
     CppEditor::CompilerOptionsBuilder optionsBuilder = clangOptionsBuilder(
-                *projectPart, warningsConfigForProject(project()), includeDir);
+                *projectPart, warningsConfigForProject(project()), includeDir,
+                ProjectExplorer::Macro::toMacros(config.editorDefines));
     const CppEditor::ProjectFile file(filePath.toString(),
                                       CppEditor::ProjectFile::classify(filePath.toString()));
     const QJsonArray projectPartOptions = fullProjectPartOptions(
@@ -742,6 +745,7 @@ void ClangdClient::updateParserConfig(const Utils::FilePath &filePath,
     DidChangeConfigurationParams configChangeParams;
     configChangeParams.setSettings(settings);
     sendMessage(DidChangeConfigurationNotification(configChangeParams));
+    emit configChanged();
 }
 
 void ClangdClient::switchIssuePaneEntries(const Utils::FilePath &filePath)

src/plugins/clangcodemodel/clangdclient.h

@@ -114,6 +114,7 @@ signals:
                                   const Utils::FilePath &file);
     void proposalReady(TextEditor::IAssistProposal *proposal);
     void textMarkCreated(const Utils::FilePath &file);
+    void configChanged();
 
 private:
     void handleDiagnostics(const LanguageServerProtocol::PublishDiagnosticsParams &params) override;

src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp

@@ -3,12 +3,10 @@
 
 #include "clangeditordocumentprocessor.h"
 
-#include "clangdiagnostictooltipwidget.h"
-#include "clangfixitoperation.h"
 #include "clangmodelmanagersupport.h"
-#include "clangutils.h"
 
 #include <cppeditor/builtincursorinfo.h>
+#include <cppeditor/builtineditordocumentparser.h>
 #include <cppeditor/clangdiagnosticconfigsmodel.h>
 #include <cppeditor/compileroptionsbuilder.h>
 #include <cppeditor/cppcodemodelsettings.h>
@@ -41,6 +39,11 @@ ClangEditorDocumentProcessor::ClangEditorDocumentProcessor(TextEditor::TextDocum
 {
     connect(parser().data(), &CppEditor::BaseEditorDocumentParser::projectPartInfoUpdated,
             this, &BaseEditorDocumentProcessor::projectPartInfoUpdated);
+    connect(static_cast<CppEditor::BuiltinEditorDocumentParser *>(parser().data()),
+            &CppEditor::BuiltinEditorDocumentParser::finished,
+            this, [this] {
+        emit parserConfigChanged(Utils::FilePath::fromString(filePath()), parserConfig());
+    });
     setSemanticHighlightingChecker([this] {
         return !ClangModelManagerSupport::clientForFile(m_document.filePath());
     });

src/plugins/clangcodemodel/clangutils.cpp

@@ -171,7 +171,7 @@ GenerateCompilationDbResult generateCompilationDB(QList<ProjectInfo::ConstPtr> p
             QTC_ASSERT(projectInfo, continue);
             QStringList args;
             const CompilerOptionsBuilder optionsBuilder = clangOptionsBuilder(
-                        *projectPart, warningsConfig, clangIncludeDir);
+                        *projectPart, warningsConfig, clangIncludeDir, {});
             QJsonArray ppOptions;
             if (purpose == CompilationDbPurpose::Project) {
                 args = projectPartArguments(*projectPart);
@@ -328,7 +328,8 @@ QString textUntilPreviousStatement(TextEditor::TextDocumentManipulatorInterface
 
 CompilerOptionsBuilder clangOptionsBuilder(const ProjectPart &projectPart,
                                            const ClangDiagnosticConfig &warningsConfig,
-                                           const Utils::FilePath &clangIncludeDir)
+                                           const FilePath &clangIncludeDir,
+                                           const Macros &extraMacros)
 {
     const auto useBuildSystemWarnings = warningsConfig.useBuildSystemWarnings()
             ? UseBuildSystemWarnings::Yes
@@ -336,7 +337,9 @@ CompilerOptionsBuilder clangOptionsBuilder(const ProjectPart &projectPart,
     CompilerOptionsBuilder optionsBuilder(projectPart, UseSystemHeader::No,
                                           UseTweakedHeaderPaths::Yes, UseLanguageDefines::No,
                                           useBuildSystemWarnings, clangIncludeDir);
-    optionsBuilder.provideAdditionalMacros({ProjectExplorer::Macro("Q_CREATOR_RUN", "1")});
+    Macros fullMacroList = extraMacros;
+    fullMacroList += Macro("Q_CREATOR_RUN", "1");
+    optionsBuilder.provideAdditionalMacros(fullMacroList);
     optionsBuilder.build(ProjectFile::Unclassified, UsePrecompiledHeaders::No);
     optionsBuilder.add("-fmessage-length=0", /*gccOnlyOption=*/true);
     optionsBuilder.add("-fdiagnostics-show-note-include-stack", /*gccOnlyOption=*/true);

src/plugins/clangcodemodel/clangutils.h

@@ -35,7 +35,8 @@ const QStringList globalClangOptions();
 CppEditor::CompilerOptionsBuilder clangOptionsBuilder(
         const CppEditor::ProjectPart &projectPart,
         const CppEditor::ClangDiagnosticConfig &warningsConfig,
-        const Utils::FilePath &clangIncludeDir);
+        const Utils::FilePath &clangIncludeDir,
+        const ProjectExplorer::Macros &extraMacros);
 QJsonArray projectPartOptions(const CppEditor::CompilerOptionsBuilder &optionsBuilder);
 QJsonArray fullProjectPartOptions(const CppEditor::CompilerOptionsBuilder &optionsBuilder,
                                   const QStringList &projectOptions);

src/plugins/clangcodemodel/test/clangdtests.cpp

@@ -20,6 +20,7 @@
 #include <projectexplorer/target.h>
 #include <texteditor/codeassist/assistproposaliteminterface.h>
 #include <texteditor/codeassist/textdocumentmanipulatorinterface.h>
+#include <texteditor/textmark.h>
 #include <utils/algorithm.h>
 #include <utils/environment.h>
 #include <utils/filepath.h>
@@ -2001,6 +2002,15 @@ ClangdTestExternalChanges::ClangdTestExternalChanges()
 
 void ClangdTestExternalChanges::test()
 {
+    ClangdClient * const oldClient = client();
+    QVERIFY(oldClient);
+
+    // Wait until things have settled.
+    while (true) {
+        if (!waitForSignalOrTimeout(oldClient, &ClangdClient::configChanged, timeOutInMs()))
+            break;
+    }
+
     // Break a header file that is used, but not open in Creator.
     // Neither we nor the server should notice, and no diagnostics should be shown for the
     // source file that includes the now-broken header.
@@ -2008,14 +2018,15 @@ void ClangdTestExternalChanges::test()
     QVERIFY(header.open(QIODevice::WriteOnly));
     header.write("blubb");
     header.close();
-    ClangdClient * const oldClient = client();
-    QVERIFY(oldClient);
     waitForSignalOrTimeout(LanguageClientManager::instance(),
                            &LanguageClientManager::clientAdded, timeOutInMs());
     QCOMPARE(client(), oldClient);
     QCOMPARE(client(), ClangModelManagerSupport::clientForProject(project()));
     const TextDocument * const curDoc = document("main.cpp");
     QVERIFY(curDoc);
+    if (!curDoc->marks().isEmpty())
+        for (const auto &m : curDoc->marks())
+            qDebug() << m->lineAnnotation();
     QVERIFY(curDoc->marks().isEmpty());
 
     // Now trigger an external change in an open, but not currently visible file and

src/plugins/cppeditor/cppeditorwidget.cpp

@@ -507,8 +507,6 @@ void CppEditorWidget::finalizeInitialization()
 
     // clang-format on
     // Toolbar: '#' Button
-    // TODO: Make "Additional Preprocessor Directives" also useful with Clang Code Model.
-    if (!d->m_modelManager->isClangCodeModelActive()) {
     d->m_preprocessorButton = new QToolButton(this);
     d->m_preprocessorButton->setText(QLatin1String("#"));
     Command *cmd = ActionManager::command(Constants::OPEN_PREPROCESSOR_DIALOG);
@@ -517,9 +515,7 @@ void CppEditorWidget::finalizeInitialization()
     updatePreprocessorButtonTooltip();
     connect(d->m_preprocessorButton, &QAbstractButton::clicked,
             this, &CppEditorWidget::showPreProcessorWidget);
-
     insertExtraToolBarWidget(TextEditorWidget::Left, d->m_preprocessorButton);
-    }
 
     connect(this, &TextEditor::TextEditorWidget::toolbarOutlineChanged,
             this, &CppEditorWidget::handleOutlineChanged);