Android: generate .project and .classpath

These files are needed by the java language server to operate properly.

Change-Id: Ie96a1fe32fefeea7333c7fa752557f79796a1478
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/android/javalanguageserver.cpp

@@ -25,11 +25,17 @@
 
 #include "javalanguageserver.h"
 
+#include "androidconfigurations.h"
 #include "androidconstants.h"
+#include "androidmanager.h"
 
 #include <languageclient/client.h>
 #include <languageclient/languageclientinterface.h>
 #include <languageclient/languageclientutils.h>
+#include <projectexplorer/kitinformation.h>
+#include <projectexplorer/project.h>
+#include <projectexplorer/projectnodes.h>
+#include <projectexplorer/target.h>
 #include <utils/environment.h>
 #include <utils/pathchooser.h>
 #include <utils/temporarydirectory.h>
@@ -41,7 +47,6 @@
 using namespace Utils;
 
 constexpr char languageServerKey[] = "languageServer";
-constexpr char workspaceKey[] = "workspace";
 
 namespace Android {
 namespace Internal {
@@ -199,6 +204,12 @@ public:
     using Client::Client;
 
     void executeCommand(const LanguageServerProtocol::Command &command) override;
+    void setCurrentProject(ProjectExplorer::Project *project) override;
+    void updateProjectFiles();
+    void updateTarget(ProjectExplorer::Target *target);
+
+private:
+    ProjectExplorer::Target *m_currentTarget = nullptr;
 };
 
 void JLSClient::executeCommand(const LanguageServerProtocol::Command &command)
@@ -217,6 +228,108 @@ void JLSClient::executeCommand(const LanguageServerProtocol::Command &command)
     }
 }
 
+void JLSClient::setCurrentProject(ProjectExplorer::Project *project)
+{
+    Client::setCurrentProject(project);
+    QTC_ASSERT(project, return);
+    updateTarget(project->activeTarget());
+    updateProjectFiles();
+    connect(project, &ProjectExplorer::Project::activeTargetChanged,
+            this, &JLSClient::updateTarget);
+}
+
+static void generateProjectFile(const FilePath &projectDir, const QString &projectName)
+{
+    const FilePath projectFilePath = projectDir.pathAppended(".project");
+    QFile projectFile(projectFilePath.toString());
+    if (projectFile.open(QFile::Truncate | QFile::WriteOnly)) {
+        QXmlStreamWriter writer(&projectFile);
+        writer.setAutoFormatting(true);
+        writer.writeStartDocument();
+        writer.writeComment("Autogenerated by Qt Creator. "
+                            "Changes to this file will not be taken into account.");
+        writer.writeStartElement("projectDescription");
+        writer.writeTextElement("name", projectName);
+        writer.writeStartElement("natures");
+        writer.writeTextElement("nature", "org.eclipse.jdt.core.javanature");
+        writer.writeEndElement(); // natures
+        writer.writeEndElement(); // projectDescription
+        writer.writeEndDocument();
+        projectFile.close();
+    }
+}
+
+static void generateClassPathFile(const FilePath &projectDir,
+                                  const QString &sourceDir,
+                                  const QStringList &libs)
+{
+    const FilePath classPathFilePath = projectDir.pathAppended(".classpath");
+    QFile classPathFile(classPathFilePath.toString());
+    if (classPathFile.open(QFile::Truncate | QFile::WriteOnly)) {
+        QXmlStreamWriter writer(&classPathFile);
+        writer.setAutoFormatting(true);
+        writer.writeStartDocument();
+        writer.writeComment("Autogenerated by Qt Creator. "
+                            "Changes to this file will not be taken into account.");
+        writer.writeStartElement("classpath");
+        writer.writeEmptyElement("classpathentry");
+        writer.writeAttribute("kind", "src");
+        writer.writeAttribute("path", sourceDir);
+        for (const QString &lib : libs) {
+            writer.writeEmptyElement("classpathentry");
+            writer.writeAttribute("kind", "lib");
+            writer.writeAttribute("path", lib);
+        }
+        writer.writeEndElement(); // classpath
+        writer.writeEndDocument();
+        classPathFile.close();
+    }
+}
+
+void JLSClient::updateProjectFiles()
+{
+    using namespace ProjectExplorer;
+    if (!m_currentTarget)
+        return;
+    if (Target *target = m_currentTarget) {
+        Kit *kit = m_currentTarget->kit();
+        if (DeviceTypeKitAspect::deviceTypeId(kit) != Android::Constants::ANDROID_DEVICE_TYPE)
+            return;
+        if (ProjectNode *node = project()->findNodeForBuildKey(target->activeBuildKey())) {
+            const FilePath &projectDir = project()->rootProjectDirectory();
+            if (!projectDir.exists())
+                return;
+            FilePath sourceDir = FilePath::fromVariant(
+                node->data(Constants::AndroidPackageSourceDir));
+            sourceDir = sourceDir.pathAppended("src");
+            if (!sourceDir.exists())
+                return;
+            sourceDir = sourceDir.relativeChildPath(projectDir);
+            const FilePath &sdkLocation = AndroidConfigurations::currentConfig().sdkLocation();
+            const QString &targetSDK = AndroidManager::buildTargetSDK(m_currentTarget);
+            const QString androidJar = QString("%1/platforms/%2/android.jar")
+                                           .arg(sdkLocation.toString(), targetSDK);
+            const QStringList libs(androidJar);
+            generateClassPathFile(projectDir, sourceDir.toString(), libs);
+            generateProjectFile(projectDir, project()->displayName());
+        }
+    }
+}
+
+void JLSClient::updateTarget(ProjectExplorer::Target *target)
+{
+    if (m_currentTarget) {
+        disconnect(m_currentTarget, &ProjectExplorer::Target::parsingFinished,
+                   this, &JLSClient::updateProjectFiles);
+    }
+    m_currentTarget = target;
+    if (m_currentTarget) {
+        connect(m_currentTarget, &ProjectExplorer::Target::parsingFinished,
+                this, &JLSClient::updateProjectFiles);
+    }
+    updateProjectFiles();
+}
+
 LanguageClient::Client *JLSSettings::createClient(LanguageClient::BaseClientInterface *interface) const
 {
     return new JLSClient(interface);

src/plugins/languageclient/client.h

@@ -134,10 +134,10 @@ public:
     bool documentUpdatePostponed(const Utils::FilePath &fileName) const;
 
     // workspace control
-    void setCurrentProject(ProjectExplorer::Project *project);
+    virtual void setCurrentProject(ProjectExplorer::Project *project);
     const ProjectExplorer::Project *project() const;
-    void projectOpened(ProjectExplorer::Project *project);
-    void projectClosed(ProjectExplorer::Project *project);
+    virtual void projectOpened(ProjectExplorer::Project *project);
+    virtual void projectClosed(ProjectExplorer::Project *project);
 
     // commands
     void requestCodeActions(const LanguageServerProtocol::DocumentUri &uri,