ClangFormat: Fix override checkbox doesn't affect behavior

Override checkbox allows use clangFormat settings
from widget even if there is .clang-format file in
file's folder or parent folder.
It works for global settings and for project settings.

Change-Id: I03152f4b0e1b62b3ac038024e76cc9082fa37ec3
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

3 files changed, 82 insertions, 58 deletions

diff --git a/src/plugins/clangformat/clangformatbaseindenter.cpp b/src/plugins/clangformat/clangformatbaseindenter.cpp
index ff990044a0..b9ee78b50e 100644
--- a/src/plugins/clangformat/clangformatbaseindenter.cpp
+++ b/src/plugins/clangformat/clangformatbaseindenter.cpp
@@ -25,10 +25,15 @@
 
 #include "clangformatbaseindenter.h"
 #include "clangformatconstants.h"
+#include "clangformatsettings.h"
 #include "clangformatutils.h"
+
 #include <coreplugin/icore.h>
-#include <texteditor/texteditorsettings.h>
+#include <projectexplorer/editorconfiguration.h>
+#include <projectexplorer/project.h>
+#include <projectexplorer/session.h>
 #include <texteditor/icodestylepreferences.h>
+#include <texteditor/texteditorsettings.h>
 
 #include <clang/Tooling/Core/Replacement.h>
 
@@ -731,31 +736,43 @@ void ClangFormatBaseIndenter::autoIndent(const QTextCursor &cursor,
 
 clang::format::FormatStyle ClangFormatBaseIndenter::styleForFile() const
 {
-    llvm::Expected<clang::format::FormatStyle> style
+    llvm::Expected<clang::format::FormatStyle> styleFromProjectFolder
         = clang::format::getStyle("file", m_fileName.path().toStdString(), "none");
 
-    if (style) {
-        if (*style == clang::format::getNoStyle()) {
-            Utils::FilePath filePath = filePathToCurrentSettings(
-                TextEditor::TextEditorSettings::codeStyle("Cpp")->currentPreferences());
-
-            if (!filePath.exists())
-                return qtcStyle();
-
-            clang::format::FormatStyle style;
-            style.Language = clang::format::FormatStyle::LK_Cpp;
-            const std::error_code error
-                = clang::format::parseConfiguration(filePath.fileContents().toStdString(), &style);
-            QTC_ASSERT(error.value() == static_cast<int>(clang::format::ParseError::Success),
-                       return qtcStyle());
+    const ProjectExplorer::Project *projectForFile
+        = ProjectExplorer::SessionManager::projectForFile(m_fileName);
+    const bool overrideStyleFile
+        = projectForFile ? projectForFile->namedSettings(Constants::OVERRIDE_FILE_ID).toBool()
+                         : ClangFormatSettings::instance().overrideDefaultFile();
+    const TextEditor::ICodeStylePreferences *preferences
+        = projectForFile
+              ? projectForFile->editorConfiguration()->codeStyle("Cpp")->currentPreferences()
+              : TextEditor::TextEditorSettings::codeStyle("Cpp")->currentPreferences();
+
+    if (overrideStyleFile || !styleFromProjectFolder
+        || *styleFromProjectFolder == clang::format::getNoStyle()) {
+        Utils::FilePath filePath = filePathToCurrentSettings(preferences);
+
+        if (!filePath.exists())
+            return qtcStyle();
+
+        clang::format::FormatStyle currentSettingsStyle;
+        currentSettingsStyle.Language = clang::format::FormatStyle::LK_Cpp;
+        const std::error_code error
+            = clang::format::parseConfiguration(filePath.fileContents().toStdString(),
+                                                &currentSettingsStyle);
+        QTC_ASSERT(error.value() == static_cast<int>(clang::format::ParseError::Success),
+                   return qtcStyle());
+
+        return currentSettingsStyle;
+    }
 
-            return style;
-        }
-        addQtcStatementMacros(*style);
-        return *style;
+    if (styleFromProjectFolder) {
+        addQtcStatementMacros(*styleFromProjectFolder);
+        return *styleFromProjectFolder;
     }
 
-    handleAllErrors(style.takeError(), [](const llvm::ErrorInfoBase &) {
+    handleAllErrors(styleFromProjectFolder.takeError(), [](const llvm::ErrorInfoBase &) {
         // do nothing
     });
 
diff --git a/src/plugins/clangformat/clangformatconfigwidget.cpp b/src/plugins/clangformat/clangformatconfigwidget.cpp
index 1e1719e608..b58d346981 100644
--- a/src/plugins/clangformat/clangformatconfigwidget.cpp
+++ b/src/plugins/clangformat/clangformatconfigwidget.cpp
@@ -92,7 +92,6 @@ static bool isBeautifierOnSaveActivated()
 static int indentIndex() { return 0; }
 static int formatIndex() { return 1; }
 
-
 bool ClangFormatConfigWidget::eventFilter(QObject *object, QEvent *event)
 {
     if (event->type() == QEvent::Wheel && qobject_cast<QComboBox *>(object)) {
@@ -111,27 +110,14 @@ ClangFormatConfigWidget::ClangFormatConfigWidget(TextEditor::ICodeStylePreferenc
     , m_ui(std::make_unique<Ui::ClangFormatConfigWidget>())
 {
     m_ui->setupUi(this);
-    setEnabled(!codeStyle->isReadOnly());
-
     m_config = std::make_unique<ClangFormatFile>(filePathToCurrentSettings(codeStyle),
                                                  codeStyle->isReadOnly());
 
-    initChecksAndPreview();
-    showCombobox();
+    initChecksAndPreview(!codeStyle->isReadOnly());
+    initOverrideCheckBox();
+    initIndentationOrFormattingCombobox();
 
-    if (m_project) {
-        m_ui->overrideDefault->setChecked(
-            m_project->namedSettings(Constants::OVERRIDE_FILE_ID).toBool());
-    } else {
-        m_ui->overrideDefault->setChecked(ClangFormatSettings::instance().overrideDefaultFile());
-        m_ui->overrideDefault->setToolTip(
-            tr("Override Clang Format configuration file with the fallback configuration."));
-    }
-
-    connect(m_ui->overrideDefault, &QCheckBox::toggled,
-            this, &ClangFormatConfigWidget::showOrHideWidgets);
     showOrHideWidgets();
-
     fillTable();
     updatePreview();
 
@@ -140,13 +126,14 @@ ClangFormatConfigWidget::ClangFormatConfigWidget(TextEditor::ICodeStylePreferenc
 
 ClangFormatConfigWidget::~ClangFormatConfigWidget() = default;
 
-void ClangFormatConfigWidget::initChecksAndPreview()
+void ClangFormatConfigWidget::initChecksAndPreview(bool enabled)
 {
     m_checksScrollArea = new QScrollArea();
     m_checksWidget = new QWidget;
     m_checks->setupUi(m_checksWidget);
     m_checksScrollArea->setWidget(m_checksWidget);
     m_checksScrollArea->setMaximumWidth(500);
+    m_checksWidget->setEnabled(enabled);
 
     m_ui->horizontalLayout_2->addWidget(m_checksScrollArea);
 
@@ -171,6 +158,29 @@ void ClangFormatConfigWidget::initChecksAndPreview()
     m_preview->textDocument()->indenter()->setFileName(fileName);
 }
 
+void ClangFormatConfigWidget::initOverrideCheckBox()
+{
+    if (m_project) {
+        m_ui->overrideDefault->setChecked(
+            m_project->namedSettings(Constants::OVERRIDE_FILE_ID).toBool());
+    } else {
+        m_ui->overrideDefault->setChecked(ClangFormatSettings::instance().overrideDefaultFile());
+        m_ui->overrideDefault->setToolTip(
+            tr("Override Clang Format configuration file with the fallback configuration."));
+    }
+
+    connect(m_ui->overrideDefault, &QCheckBox::toggled,
+            this, &ClangFormatConfigWidget::showOrHideWidgets);
+    connect(m_ui->overrideDefault, &QCheckBox::toggled, this, [this](bool checked) {
+        if (m_project)
+            m_project->setNamedSettings(Constants::OVERRIDE_FILE_ID, checked);
+        else {
+            ClangFormatSettings::instance().setOverrideDefaultFile(checked);
+            ClangFormatSettings::instance().write();
+        }
+    });
+}
+
 void ClangFormatConfigWidget::connectChecks()
 {
     for (QObject *child : m_checksWidget->children()) {
@@ -198,7 +208,7 @@ void ClangFormatConfigWidget::onTableChanged()
     saveChanges(sender());
 }
 
-void ClangFormatConfigWidget::showCombobox()
+void ClangFormatConfigWidget::initIndentationOrFormattingCombobox()
 {
     m_ui->indentingOrFormatting->insertItem(indentIndex(), tr("Indenting only"));
     m_ui->indentingOrFormatting->insertItem(formatIndex(), tr("Full formatting"));
@@ -209,6 +219,17 @@ void ClangFormatConfigWidget::showCombobox()
         m_ui->indentingOrFormatting->setCurrentIndex(indentIndex());
 
     m_ui->indentingOrFormatting->show();
+
+    connect(m_ui->indentingOrFormatting, &QComboBox::currentIndexChanged, this, [](int index) {
+        ClangFormatSettings &settings = ClangFormatSettings::instance();
+        const bool isFormatting = index == formatIndex();
+        settings.setFormatCodeInsteadOfIndent(isFormatting);
+
+        if (!isBeautifierOnSaveActivated())
+            settings.setFormatOnSave(isFormatting);
+
+        settings.write();
+    });
 }
 
 static bool projectConfigExists()
@@ -435,22 +456,7 @@ void ClangFormatConfigWidget::synchronize()
 
 void ClangFormatConfigWidget::apply()
 {
-    ClangFormatSettings &settings = ClangFormatSettings::instance();
-    const bool isFormatting = m_ui->indentingOrFormatting->currentIndex()
-                              == formatIndex();
-    settings.setFormatCodeInsteadOfIndent(isFormatting);
-    settings.setOverrideDefaultFile(m_ui->overrideDefault->isChecked());
-
-    if (!isBeautifierOnSaveActivated()) {
-        settings.setFormatOnSave(isFormatting);
-    }
-
-    if (m_project) {
-        m_project->setNamedSettings(Constants::OVERRIDE_FILE_ID, m_ui->overrideDefault->isChecked());
-    }
-    settings.write();
-
-    if (!m_checksWidget->isVisible())
+    if (!m_checksWidget->isVisible() && !m_checksWidget->isEnabled())
         return;
 
     saveChanges(this);
diff --git a/src/plugins/clangformat/clangformatconfigwidget.h b/src/plugins/clangformat/clangformatconfigwidget.h
index 9a46089250..52a5a94bc1 100644
--- a/src/plugins/clangformat/clangformatconfigwidget.h
+++ b/src/plugins/clangformat/clangformatconfigwidget.h
@@ -63,13 +63,14 @@ private:
     bool eventFilter(QObject *object, QEvent *event) override;
 
     void showOrHideWidgets();
-    void initChecksAndPreview();
+    void initChecksAndPreview(bool enabled);
+    void initOverrideCheckBox();
     void connectChecks();
 
     void fillTable();
     void saveChanges(QObject *sender);
 
-    void showCombobox();
+    void initIndentationOrFormattingCombobox();
     void updatePreview();
 
     ProjectExplorer::Project *m_project;