FindInFiles: make possible to have more than one extension

This change adds a possibility to add more than
one external tool which can be used instead of internal finder.
Currently there is one extension: 'gitgrep'.
By default we use internal finder.

Change-Id: If644358552f3cea9ebda8308539322a1b6d3ab77
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

6 files changed, 168 insertions, 89 deletions

diff --git a/src/plugins/git/gitgrep.cpp b/src/plugins/git/gitgrep.cpp
index 05060f413b..85547807e0 100644
--- a/src/plugins/git/gitgrep.cpp
+++ b/src/plugins/git/gitgrep.cpp
@@ -42,7 +42,6 @@
 #include <utils/synchronousprocess.h>
 #include <utils/textfileformat.h>
 
-#include <QCheckBox>
 #include <QFuture>
 #include <QFutureWatcher>
 #include <QHBoxLayout>
@@ -58,7 +57,6 @@ class GitGrepParameters
 {
 public:
     QString ref;
-    bool isEnabled = false;
 };
 
 using namespace Core;
@@ -67,7 +65,6 @@ using VcsBase::VcsCommand;
 
 namespace {
 
-const char EnableGitGrep[] = "EnableGitGrep";
 const char GitGrepRef[] = "GitGrepRef";
 
 class GitGrepRunner : public QObject
@@ -155,7 +152,7 @@ public:
         else
             arguments << "-F";
         arguments << m_parameters.text;
-        GitGrepParameters params = m_parameters.extensionParameters.value<GitGrepParameters>();
+        GitGrepParameters params = m_parameters.searchEngineParameters.value<GitGrepParameters>();
         if (!params.ref.isEmpty()) {
             arguments << params.ref;
             m_ref = params.ref + ':';
@@ -213,10 +210,6 @@ GitGrep::GitGrep()
     m_widget = new QWidget;
     auto layout = new QHBoxLayout(m_widget);
     layout->setMargin(0);
-    m_enabledCheckBox = new QCheckBox(tr("&Use Git Grep"));
-    m_enabledCheckBox->setToolTip(tr("Use Git Grep for searching. This includes only files "
-                                     "that are managed by Git."));
-    layout->addWidget(m_enabledCheckBox);
     m_treeLineEdit = new FancyLineEdit;
     m_treeLineEdit->setPlaceholderText(tr("Tree (optional)"));
     m_treeLineEdit->setToolTip(tr("Can be HEAD, tag, local or remote branch, or a commit hash.\n"
@@ -230,7 +223,7 @@ GitGrep::GitGrep()
             m_widget, [this](const QString &path) {
         m_widget->setEnabled(validateDirectory(path));
     });
-    findInFiles->setFindExtension(this);
+    findInFiles->addSearchEngine(this);
 }
 
 GitGrep::~GitGrep()
@@ -258,36 +251,28 @@ QWidget *GitGrep::widget() const
 
 bool GitGrep::isEnabled() const
 {
-    return m_widget->isEnabled() && m_enabledCheckBox->isChecked();
-}
-
-bool GitGrep::isEnabled(const TextEditor::FileFindParameters &parameters) const
-{
-    return parameters.extensionParameters.value<GitGrepParameters>().isEnabled;
+    return m_widget->isEnabled();
 }
 
 QVariant GitGrep::parameters() const
 {
     GitGrepParameters params;
-    params.isEnabled = isEnabled();
     params.ref = m_treeLineEdit->text();
     return qVariantFromValue(params);
 }
 
 void GitGrep::readSettings(QSettings *settings)
 {
-    m_enabledCheckBox->setChecked(settings->value(EnableGitGrep, false).toBool());
     m_treeLineEdit->setText(settings->value(GitGrepRef).toString());
 }
 
 void GitGrep::writeSettings(QSettings *settings) const
 {
-    settings->setValue(EnableGitGrep, m_enabledCheckBox->isChecked());
     settings->setValue(GitGrepRef, m_treeLineEdit->text());
 }
 
-QFuture<FileSearchResultList> GitGrep::executeSearch(
-        const TextEditor::FileFindParameters &parameters)
+QFuture<FileSearchResultList> GitGrep::executeSearch(const TextEditor::FileFindParameters &parameters,
+        TextEditor::BaseFileFind * /*baseFileFind*/)
 {
     return Utils::runAsync(GitGrepRunner::run, parameters);
 }
@@ -295,8 +280,8 @@ QFuture<FileSearchResultList> GitGrep::executeSearch(
 IEditor *GitGrep::openEditor(const SearchResultItem &item,
                              const TextEditor::FileFindParameters &parameters)
 {
-    GitGrepParameters params = parameters.extensionParameters.value<GitGrepParameters>();
-    if (!params.isEnabled || params.ref.isEmpty() || item.path.isEmpty())
+    GitGrepParameters params = parameters.searchEngineParameters.value<GitGrepParameters>();
+    if (params.ref.isEmpty() || item.path.isEmpty())
         return nullptr;
     const QString path = QDir::fromNativeSeparators(item.path.first());
     QByteArray content;
diff --git a/src/plugins/git/gitgrep.h b/src/plugins/git/gitgrep.h
index 1bcec59d39..3adc487f9f 100644
--- a/src/plugins/git/gitgrep.h
+++ b/src/plugins/git/gitgrep.h
@@ -29,14 +29,12 @@
 
 #include <QCoreApplication>
 
-QT_FORWARD_DECLARE_CLASS(QCheckBox)
-
 namespace Utils { class FancyLineEdit; }
 
 namespace Git {
 namespace Internal {
 
-class GitGrep : public TextEditor::FileFindExtension
+class GitGrep : public TextEditor::SearchEngine
 {
     Q_DECLARE_TR_FUNCTIONS(GitGrep)
 
@@ -47,18 +45,17 @@ public:
     QString toolTip() const override;
     QWidget *widget() const override;
     bool isEnabled() const override;
-    bool isEnabled(const TextEditor::FileFindParameters &parameters) const override;
     QVariant parameters() const override;
     void readSettings(QSettings *settings) override;
     void writeSettings(QSettings *settings) const override;
     QFuture<Utils::FileSearchResultList> executeSearch(
-            const TextEditor::FileFindParameters &parameters) override;
+            const TextEditor::FileFindParameters &parameters,
+            TextEditor::BaseFileFind *baseFileFind) override;
     Core::IEditor *openEditor(const Core::SearchResultItem &item,
                               const TextEditor::FileFindParameters &parameters) override;
 
 private:
     QWidget *m_widget;
-    QCheckBox *m_enabledCheckBox;
     Utils::FancyLineEdit *m_treeLineEdit;
 };
 
diff --git a/src/plugins/texteditor/basefilefind.cpp b/src/plugins/texteditor/basefilefind.cpp
index 46ab0f2b48..df5ac05fe6 100644
--- a/src/plugins/texteditor/basefilefind.cpp
+++ b/src/plugins/texteditor/basefilefind.cpp
@@ -50,7 +50,6 @@
 #include <QPointer>
 #include <QComboBox>
 #include <QLabel>
-#include <QLabel>
 
 using namespace Utils;
 using namespace Core;
@@ -58,6 +57,45 @@ using namespace Core;
 namespace TextEditor {
 namespace Internal {
 
+namespace {
+class InternalEngine : public TextEditor::SearchEngine
+{
+public:
+    InternalEngine() : m_widget(new QWidget) {}
+    ~InternalEngine() override { delete m_widget;}
+    QString title() const override { return tr("Internal"); }
+    QString toolTip() const override { return QString(); }
+    QWidget *widget() const override { return m_widget; }
+    bool isEnabled() const override { return true; }
+    QVariant parameters() const override { return QVariant(); }
+    void readSettings(QSettings */*settings*/) override {}
+    void writeSettings(QSettings */*settings*/) const override {}
+    QFuture<Utils::FileSearchResultList> executeSearch(
+            const TextEditor::FileFindParameters &parameters,
+            BaseFileFind *baseFileFind) override
+    {
+        auto func = parameters.flags & FindRegularExpression
+                ? Utils::findInFilesRegExp
+                : Utils::findInFiles;
+
+        return func(parameters.text,
+                    baseFileFind->files(parameters.nameFilters, parameters.additionalParameters),
+                    textDocumentFlagsForFindFlags(parameters.flags),
+                    TextDocument::openedTextDocumentContents());
+
+    }
+    Core::IEditor *openEditor(const Core::SearchResultItem &/*item*/,
+                              const TextEditor::FileFindParameters &/*parameters*/) override
+    {
+        return nullptr;
+    }
+
+private:
+    QWidget *m_widget;
+};
+}
+
+
 class CountingLabel : public QLabel
 {
 public:
@@ -68,6 +106,7 @@ public:
 class BaseFileFindPrivate
 {
 public:
+    ~BaseFileFindPrivate() { delete m_internalSearchEngine; }
     QMap<QFutureWatcher<FileSearchResultList> *, QPointer<SearchResult> > m_watchers;
     QPointer<IFindSupport> m_currentFindSupport;
 
@@ -75,7 +114,9 @@ public:
     QStringListModel m_filterStrings;
     QString m_filterSetting;
     QPointer<QComboBox> m_filterCombo;
-    QPointer<FileFindExtension> m_extension;
+    QVector<SearchEngine *> m_searchEngines;
+    SearchEngine *m_internalSearchEngine;
+    int m_currentSearchEngineIndex = 0;
 };
 
 } // namespace Internal
@@ -84,6 +125,8 @@ using namespace Internal;
 
 BaseFileFind::BaseFileFind() : d(new BaseFileFindPrivate)
 {
+    d->m_internalSearchEngine = new InternalEngine;
+    addSearchEngine(d->m_internalSearchEngine);
 }
 
 BaseFileFind::~BaseFileFind()
@@ -119,7 +162,7 @@ QStringList BaseFileFind::fileNameFilters() const
 {
     QStringList filters;
     if (d->m_filterCombo && !d->m_filterCombo->currentText().isEmpty()) {
-        const QStringList parts = d->m_filterCombo->currentText().split(QLatin1Char(','));
+        const QStringList parts = d->m_filterCombo->currentText().split(',');
         foreach (const QString &part, parts) {
             const QString filter = part.trimmed();
             if (!filter.isEmpty())
@@ -129,9 +172,21 @@ QStringList BaseFileFind::fileNameFilters() const
     return filters;
 }
 
-FileFindExtension *BaseFileFind::extension() const
+SearchEngine *BaseFileFind::currentSearchEngine() const
 {
-    return d->m_extension.data();
+    if (d->m_searchEngines.isEmpty() || d->m_currentSearchEngineIndex == -1)
+        return nullptr;
+    return d->m_searchEngines[d->m_currentSearchEngineIndex];
+}
+
+QVector<SearchEngine *> BaseFileFind::searchEngines() const
+{
+    return d->m_searchEngines;
+}
+
+void BaseFileFind::setCurrentSearchEngine(int index)
+{
+    d->m_currentSearchEngineIndex = index;
 }
 
 void BaseFileFind::runNewSearch(const QString &txt, FindFlags findFlags,
@@ -141,12 +196,12 @@ void BaseFileFind::runNewSearch(const QString &txt, FindFlags findFlags,
     if (d->m_filterCombo)
         updateComboEntries(d->m_filterCombo, true);
     QString tooltip = toolTip();
-    if (d->m_extension)
-        tooltip = tooltip.arg(d->m_extension->toolTip());
-    SearchResult *search = SearchResultWindow::instance()->startNewSearch(label(),
-                           tooltip.arg(IFindFilter::descriptionForFindFlags(findFlags)),
-                           txt, searchMode, SearchResultWindow::PreserveCaseEnabled,
-                           QString::fromLatin1("TextEditor"));
+
+    SearchResult *search = SearchResultWindow::instance()->startNewSearch(
+                label(),
+                tooltip.arg(IFindFilter::descriptionForFindFlags(findFlags)),
+                txt, searchMode, SearchResultWindow::PreserveCaseEnabled,
+                QString::fromLatin1("TextEditor"));
     search->setTextToReplace(txt);
     search->setSearchAgainSupported(true);
     FileFindParameters parameters;
@@ -154,8 +209,8 @@ void BaseFileFind::runNewSearch(const QString &txt, FindFlags findFlags,
     parameters.flags = findFlags;
     parameters.nameFilters = fileNameFilters();
     parameters.additionalParameters = additionalParameters();
-    if (d->m_extension)
-        parameters.extensionParameters = d->m_extension->parameters();
+    parameters.searchEngineParameters = currentSearchEngine()->parameters();
+    parameters.searchEngineIndex = d->m_currentSearchEngineIndex;
     search->setUserData(qVariantFromValue(parameters));
     connect(search, &SearchResult::activated, this, &BaseFileFind::openEditor);
     if (searchMode == SearchResultWindow::SearchAndReplace)
@@ -201,10 +256,9 @@ void BaseFileFind::replaceAll(const QString &txt, FindFlags findFlags)
     runNewSearch(txt, findFlags, SearchResultWindow::SearchAndReplace);
 }
 
-void BaseFileFind::setFindExtension(FileFindExtension *extension)
+void BaseFileFind::addSearchEngine(SearchEngine *searchEngine)
 {
-    QTC_ASSERT(!d->m_extension, return);
-    d->m_extension = extension;
+    d->m_searchEngines.push_back(searchEngine);
 }
 
 void BaseFileFind::doReplace(const QString &text,
@@ -275,17 +329,19 @@ QWidget *BaseFileFind::createPatternWidget()
 
 void BaseFileFind::writeCommonSettings(QSettings *settings)
 {
-    settings->setValue(QLatin1String("filters"), d->m_filterStrings.stringList());
+    settings->setValue("filters", d->m_filterStrings.stringList());
     if (d->m_filterCombo)
-        settings->setValue(QLatin1String("currentFilter"), d->m_filterCombo->currentText());
-    if (d->m_extension)
-        d->m_extension->writeSettings(settings);
+        settings->setValue("currentFilter", d->m_filterCombo->currentText());
+
+    foreach (SearchEngine *searchEngine, d->m_searchEngines)
+        searchEngine->writeSettings(settings);
+    settings->setValue("currentSearchEngineIndex", d->m_currentSearchEngineIndex);
 }
 
 void BaseFileFind::readCommonSettings(QSettings *settings, const QString &defaultFilter)
 {
-    QStringList filters = settings->value(QLatin1String("filters")).toStringList();
-    const QVariant currentFilter = settings->value(QLatin1String("currentFilter"));
+    QStringList filters = settings->value("filters").toStringList();
+    const QVariant currentFilter = settings->value("currentFilter");
     d->m_filterSetting = currentFilter.toString();
     if (filters.isEmpty())
         filters << defaultFilter;
@@ -294,8 +350,11 @@ void BaseFileFind::readCommonSettings(QSettings *settings, const QString &defaul
     d->m_filterStrings.setStringList(filters);
     if (d->m_filterCombo)
         syncComboWithSettings(d->m_filterCombo, d->m_filterSetting);
-    if (d->m_extension)
-        d->m_extension->readSettings(settings);
+
+    foreach (SearchEngine* searchEngine, d->m_searchEngines)
+        searchEngine->readSettings(settings);
+    const int currentSearchEngineIndex = settings->value("currentSearchEngineIndex", 0).toInt();
+    syncSearchEngineCombo(currentSearchEngineIndex);
 }
 
 void BaseFileFind::syncComboWithSettings(QComboBox *combo, const QString &setting)
@@ -325,9 +384,8 @@ void BaseFileFind::openEditor(const SearchResultItem &item)
 {
     SearchResult *result = qobject_cast<SearchResult *>(sender());
     FileFindParameters parameters = result->userData().value<FileFindParameters>();
-    IEditor *openedEditor = 0;
-    if (d->m_extension)
-        openedEditor = d->m_extension->openEditor(item, parameters);
+    IEditor *openedEditor =
+            d->m_searchEngines[parameters.searchEngineIndex]->openEditor(item, parameters);
     if (!openedEditor) {
         if (item.path.size() > 0) {
             openedEditor = EditorManager::openEditorAt(QDir::fromNativeSeparators(item.path.first()),
@@ -447,17 +505,7 @@ QVariant BaseFileFind::getAdditionalParameters(SearchResult *search)
 
 QFuture<FileSearchResultList> BaseFileFind::executeSearch(const FileFindParameters &parameters)
 {
-    if (d->m_extension && d->m_extension->isEnabled(parameters))
-        return d->m_extension->executeSearch(parameters);
-
-    auto func = parameters.flags & FindRegularExpression
-            ? Utils::findInFilesRegExp
-            : Utils::findInFiles;
-
-    return func(parameters.text,
-                files(parameters.nameFilters, parameters.additionalParameters),
-                textDocumentFlagsForFindFlags(parameters.flags),
-                TextDocument::openedTextDocumentContents());
+    return d->m_searchEngines[parameters.searchEngineIndex]->executeSearch(parameters,this);
 }
 
 namespace Internal {
diff --git a/src/plugins/texteditor/basefilefind.h b/src/plugins/texteditor/basefilefind.h
index 428296c3ec..a681010225 100644
--- a/src/plugins/texteditor/basefilefind.h
+++ b/src/plugins/texteditor/basefilefind.h
@@ -57,25 +57,28 @@ public:
     Core::FindFlags flags;
     QStringList nameFilters;
     QVariant additionalParameters;
-    QVariant extensionParameters;
+    int searchEngineIndex;
+    QVariant searchEngineParameters;
 };
 
-class TEXTEDITOR_EXPORT FileFindExtension : public QObject
+class BaseFileFind;
+
+class TEXTEDITOR_EXPORT SearchEngine : public QObject
 {
 public:
-    virtual ~FileFindExtension() {}
+    virtual ~SearchEngine() {}
     virtual QString title() const = 0;
     virtual QString toolTip() const = 0; // add %1 placeholder where the find flags should be put
     virtual QWidget *widget() const = 0;
     virtual bool isEnabled() const = 0;
-    virtual bool isEnabled(const FileFindParameters &parameters) const = 0;
     virtual QVariant parameters() const = 0;
     virtual void readSettings(QSettings *settings) = 0;
     virtual void writeSettings(QSettings *settings) const = 0;
     virtual QFuture<Utils::FileSearchResultList> executeSearch(
-            const FileFindParameters &parameters) = 0;
+            const FileFindParameters &parameters, BaseFileFind *baseFileFind) = 0;
     virtual Core::IEditor *openEditor(const Core::SearchResultItem &item,
                                       const FileFindParameters &parameters) = 0;
+
 };
 
 class TEXTEDITOR_EXPORT BaseFileFind : public Core::IFindFilter
@@ -90,16 +93,16 @@ public:
     bool isReplaceSupported() const { return true; }
     void findAll(const QString &txt, Core::FindFlags findFlags);
     void replaceAll(const QString &txt, Core::FindFlags findFlags);
-    void setFindExtension(FileFindExtension *extension);
+    void addSearchEngine(SearchEngine *searchEngine);
 
     /* returns the list of unique files that were passed in items */
     static QStringList replaceAll(const QString &txt,
                                   const QList<Core::SearchResultItem> &items,
                                   bool preserveCase = false);
-
-protected:
     virtual Utils::FileIterator *files(const QStringList &nameFilters,
                                        const QVariant &additionalParameters) const = 0;
+
+protected:
     virtual QVariant additionalParameters() const = 0;
     QVariant getAdditionalParameters(Core::SearchResult *search);
     virtual QString label() const = 0; // see Core::SearchResultWindow::startNewSearch
@@ -113,7 +116,11 @@ protected:
     void syncComboWithSettings(QComboBox *combo, const QString &setting);
     void updateComboEntries(QComboBox *combo, bool onTop);
     QStringList fileNameFilters() const;
-    FileFindExtension *extension() const;
+
+    SearchEngine *currentSearchEngine() const;
+    QVector<SearchEngine *> searchEngines() const;
+    void setCurrentSearchEngine(int index);
+    virtual void syncSearchEngineCombo(int /*selectedSearchEngineIndex*/) {}
 
 private:
     void displayResult(int index);
diff --git a/src/plugins/texteditor/findinfiles.cpp b/src/plugins/texteditor/findinfiles.cpp
index 3fa85c07ed..207172311a 100644
--- a/src/plugins/texteditor/findinfiles.cpp
+++ b/src/plugins/texteditor/findinfiles.cpp
@@ -41,6 +41,8 @@
 #include <QFileDialog>
 #include <QLabel>
 #include <QHBoxLayout>
+#include <QStackedWidget>
+#include <QComboBox>
 
 using namespace Core;
 using namespace TextEditor;
@@ -64,7 +66,7 @@ FindInFiles::~FindInFiles()
 
 bool FindInFiles::isValid() const
 {
-    return m_directory->isValid();
+    return m_directory->isValid() && currentSearchEngine()->isEnabled();
 }
 
 QString FindInFiles::id() const
@@ -92,11 +94,8 @@ QVariant FindInFiles::additionalParameters() const
 
 QString FindInFiles::label() const
 {
-    QString title = tr("Directory");
-    if (FileFindExtension *ext = extension()) {
-        if (ext->isEnabled())
-            title = ext->title();
-    }
+    QString title = currentSearchEngine()->title();
+
     const QChar slash = QLatin1Char('/');
     const QStringList &nonEmptyComponents = path().toFileInfo().absoluteFilePath()
             .split(slash, QString::SkipEmptyParts);
@@ -107,10 +106,31 @@ QString FindInFiles::label() const
 
 QString FindInFiles::toolTip() const
 {
-    //: %3 is filled by BaseFileFind::runNewSearch
-    return tr("Path: %1\nFilter: %2\n%3")
+    //: the last arg is filled by BaseFileFind::runNewSearch
+    QString tooltip = tr("Path: %1\nFilter: %2\n%3")
             .arg(path().toUserOutput())
             .arg(fileNameFilters().join(QLatin1Char(',')));
+
+    const QString searchEngineToolTip = currentSearchEngine()->toolTip();
+    if (!searchEngineToolTip.isEmpty())
+        tooltip = tooltip.arg(searchEngineToolTip);
+
+    return tooltip;
+}
+
+void FindInFiles::syncSearchEngineCombo(int selectedSearchEngineIndex)
+{
+    QTC_ASSERT(m_searchEngineCombo && selectedSearchEngineIndex >= 0
+               && selectedSearchEngineIndex < searchEngines().size(), return);
+
+    m_searchEngineCombo->setCurrentIndex(selectedSearchEngineIndex);
+    searchEnginesSelectionChanged(selectedSearchEngineIndex);
+}
+
+void FindInFiles::searchEnginesSelectionChanged(int index)
+{
+    setCurrentSearchEngine(index);
+    m_searchEngineWidget->setCurrentIndex(index);
 }
 
 QWidget *FindInFiles::createConfigWidget()
@@ -122,8 +142,22 @@ QWidget *FindInFiles::createConfigWidget()
         m_configWidget->setLayout(gridLayout);
 
         int row = 0;
-        if (FileFindExtension *ext = extension())
-            gridLayout->addWidget(ext->widget(), row++, 1, 1, 2);
+        auto searchEngineLabel = new QLabel(tr("Search engine:"));
+        gridLayout->addWidget(searchEngineLabel, row, 0, Qt::AlignRight);
+
+        m_searchEngineCombo = new QComboBox;
+        auto cc = static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged);
+        connect(m_searchEngineCombo, cc, this, &FindInFiles::searchEnginesSelectionChanged);
+        connect(m_searchEngineCombo, cc, this, &FindInFiles::enabledChanged);
+        searchEngineLabel->setBuddy(m_searchEngineCombo);
+        gridLayout->addWidget(m_searchEngineCombo, row, 1);
+
+        m_searchEngineWidget = new QStackedWidget(m_configWidget);
+        foreach (SearchEngine *searchEngine, searchEngines()) {
+            m_searchEngineWidget->addWidget(searchEngine->widget());
+            m_searchEngineCombo->addItem(searchEngine->title());
+        }
+        gridLayout->addWidget(m_searchEngineWidget, row++, 2);
 
         QLabel *dirLabel = new QLabel(tr("Director&y:"));
         gridLayout->addWidget(dirLabel, row, 0, Qt::AlignRight);
@@ -131,9 +165,10 @@ QWidget *FindInFiles::createConfigWidget()
         m_directory->setExpectedKind(PathChooser::ExistingDirectory);
         m_directory->setPromptDialogTitle(tr("Directory to Search"));
         connect(m_directory.data(), &PathChooser::pathChanged,
-                this, &FindInFiles::pathChanged);
-        connect(m_directory.data(), &PathChooser::validChanged,
-                this, &FindInFiles::enabledChanged);
+                this, [this](const QString &path) {
+            emit FindInFiles::pathChanged(path);
+            emit FindInFiles::enabledChanged(isEnabled());
+        });
         m_directory->setHistoryCompleter(QLatin1String(HistoryKey),
                                          /*restoreLastItemFromHistory=*/ true);
         if (!HistoryCompleter::historyExistsFor(QLatin1String(HistoryKey))) {
diff --git a/src/plugins/texteditor/findinfiles.h b/src/plugins/texteditor/findinfiles.h
index 71416aba22..4f37497091 100644
--- a/src/plugins/texteditor/findinfiles.h
+++ b/src/plugins/texteditor/findinfiles.h
@@ -32,7 +32,10 @@
 #include <QPointer>
 #include <QStringListModel>
 
-QT_FORWARD_DECLARE_CLASS(QLabel)
+QT_BEGIN_NAMESPACE
+class QLabel;
+class QStackedWidget;
+QT_END_NAMESPACE
 
 namespace Utils { class PathChooser; }
 
@@ -67,12 +70,16 @@ protected:
     QVariant additionalParameters() const;
     QString label() const;
     QString toolTip() const;
+    void syncSearchEngineCombo(int selectedSearchEngineIndex) override;
 
 private:
+    void searchEnginesSelectionChanged(int index);
     Utils::FileName path() const;
 
     QPointer<QWidget> m_configWidget;
     QPointer<Utils::PathChooser> m_directory;
+    QStackedWidget *m_searchEngineWidget = nullptr;
+    QComboBox *m_searchEngineCombo = nullptr;
 };
 
 } // namespace TextEditor