CMakePM: Add support for "add_subdirectory" operations

This means support for context menu and then "Add Existing Projects..."
and "New Subproject..."

Fixes: QTCREATORBUG-30471
Fixes: QTCREATORBUG-30818
Change-Id: Iffb0c4be744352c8acf1d9ee0bc58602af4426ba
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp

@@ -234,6 +234,12 @@ bool CMakeBuildSystem::supportsAction(Node *context, ProjectAction action, const
                    || action == ProjectAction::Rename || action == ProjectAction::RemoveFile;
     }
 
+    const auto cmakeProject = dynamic_cast<CMakeProjectNode *>(context);
+    const auto cmakeListsNode = dynamic_cast<CMakeListsNode *>(context);
+    if (cmakeProject || cmakeListsNode)
+        return action == ProjectAction::AddSubProject
+               || action == ProjectAction::AddExistingProject;
+
     return BuildSystem::supportsAction(context, action, node);
 }
 

src/plugins/cmakeprojectmanager/cmakeprojectnodes.cpp

@@ -9,6 +9,8 @@
 
 #include <android/androidconstants.h>
 
+#include <coreplugin/documentmanager.h>
+
 #include <ios/iosconstants.h>
 
 #include <projectexplorer/projectexplorerconstants.h>
@@ -16,11 +18,44 @@
 
 #include <utils/qtcassert.h>
 
+#include <texteditor/texteditor.h>
+
 using namespace ProjectExplorer;
 using namespace Utils;
 
 namespace CMakeProjectManager::Internal {
 
+static QString quoteString(const QString &str)
+{
+    return str.contains(QChar::Space) ? ("\"" + str + "\"") : str;
+}
+
+static bool addSubdirectory(const Utils::FilePath &projectPathDir, const Utils::FilePath & subProjectFilePath)
+{
+    TextEditor::BaseTextEditor *editor = qobject_cast<TextEditor::BaseTextEditor *>(
+        Core::EditorManager::openEditorAt(
+            {projectPathDir.pathAppended(Constants::CMAKE_LISTS_TXT)},
+            Constants::CMAKE_EDITOR_ID,
+            Core::EditorManager::DoNotMakeVisible | Core::EditorManager::DoNotChangeCurrentEditor));
+    if (!editor)
+        return false;
+
+    const QString subDirectory = subProjectFilePath.relativeChildPath(projectPathDir).parentDir().path();
+    if (subDirectory.isEmpty())
+        return false;
+
+    QTextCursor cursor = editor->textCursor();
+    cursor.movePosition(QTextCursor::End);
+    if (!cursor.block().text().isEmpty())
+        cursor.insertText("\n");
+    cursor.insertText(QString("add_subdirectory(%1)").arg(quoteString(subDirectory)));
+
+    if (!Core::DocumentManager::saveDocument(editor->document()))
+        return false;
+
+    return true;
+}
+
 CMakeInputsNode::CMakeInputsNode(const FilePath &cmakeLists) :
     ProjectExplorer::ProjectNode(cmakeLists)
 {
@@ -58,6 +93,22 @@ std::optional<FilePath> CMakeListsNode::visibleAfterAddFileAction() const
     return filePath().pathAppended(Constants::CMAKE_LISTS_TXT);
 }
 
+bool CMakeListsNode::canAddSubProject(const Utils::FilePath &subProjectFilePath) const
+{
+    return subProjectFilePath != filePath().pathAppended(Constants::CMAKE_LISTS_TXT)
+           && subProjectFilePath.isChildOf(filePath());
+}
+
+bool CMakeListsNode::addSubProject(const Utils::FilePath &subProjectFilePath)
+{
+    return addSubdirectory(filePath(), subProjectFilePath);
+}
+
+QStringList CMakeListsNode::subProjectFileNamePatterns() const
+{
+    return {Constants::CMAKE_LISTS_TXT};
+}
+
 CMakeProjectNode::CMakeProjectNode(const FilePath &directory) :
     ProjectExplorer::ProjectNode(directory)
 {
@@ -66,6 +117,22 @@ CMakeProjectNode::CMakeProjectNode(const FilePath &directory) :
     setListInProject(false);
 }
 
+bool CMakeProjectNode::canAddSubProject(const Utils::FilePath &subProjectFilePath) const
+{
+    return subProjectFilePath != filePath().pathAppended(Constants::CMAKE_LISTS_TXT)
+           && subProjectFilePath.isChildOf(filePath());
+}
+
+bool CMakeProjectNode::addSubProject(const Utils::FilePath &subProjectFilePath)
+{
+    return addSubdirectory(filePath(), subProjectFilePath);
+}
+
+QStringList CMakeProjectNode::subProjectFileNamePatterns() const
+{
+    return {Constants::CMAKE_LISTS_TXT};
+}
+
 QString CMakeProjectNode::tooltip() const
 {
     return QString();

src/plugins/cmakeprojectmanager/cmakeprojectnodes.h

@@ -28,6 +28,10 @@ public:
 
     bool showInSimpleTree() const final;
     std::optional<Utils::FilePath> visibleAfterAddFileAction() const override;
+
+    bool canAddSubProject(const Utils::FilePath &subProjectFilePath) const override;
+    bool addSubProject(const Utils::FilePath &subProjectFilePath) override;
+    QStringList subProjectFileNamePatterns() const override;
 };
 
 class CMakeProjectNode : public ProjectExplorer::ProjectNode
@@ -35,6 +39,10 @@ class CMakeProjectNode : public ProjectExplorer::ProjectNode
 public:
     CMakeProjectNode(const Utils::FilePath &directory);
 
+    bool canAddSubProject(const Utils::FilePath &subProjectFilePath) const override;
+    bool addSubProject(const Utils::FilePath &subProjectFilePath) override;
+    QStringList subProjectFileNamePatterns() const override;
+
     QString tooltip() const final;
 };