First implementation of ClangFormat class

Still missing installation of clang-format binaries via build.xml

Author: cmaglie

app/src/cc/arduino/packages/formatter/clangformat/ClangFormat.java

@@ -0,0 +1,121 @@
+/*
+ * This file is part of Arduino.
+ *
+ * Arduino is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2021 Arduino LLC (http://www.arduino.cc/)
+ */
+
+package cc.arduino.packages.formatter.clangformat;
+
+import static processing.app.I18n.tr;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.apache.commons.compress.utils.IOUtils;
+import org.apache.logging.log4j.core.util.NullOutputStream;
+
+import processing.app.Editor;
+import processing.app.helpers.ProcessUtils;
+import processing.app.tools.Tool;
+
+public class ClangFormat implements Tool {
+
+  private Editor editor;
+
+  public ClangFormat() {
+  }
+
+  @Override
+  public void init(Editor editor) {
+    this.editor = editor;
+  }
+
+  @Override
+  public void run() {
+    String originalText = editor.getCurrentTab().getText();
+
+    try {
+      String formattedText = runClangFormatOn(originalText);
+      if (formattedText.equals(originalText)) {
+        editor.statusNotice(tr("No changes necessary for Auto Format."));
+        return;
+      }
+      editor.getCurrentTab().setText(formattedText);
+      editor.statusNotice(tr("Auto Format finished."));
+    } catch (IOException | InterruptedException e) {
+      editor.statusError("Auto format error: " + e.getMessage());
+      e.printStackTrace();
+    }
+  }
+
+  @Override
+  public String getMenuTitle() {
+    return tr("Auto Format");
+  }
+
+  private Thread copyAndClose(InputStream input, OutputStream output) {
+    Thread t = new Thread(() -> {
+      try {
+        IOUtils.copy(input, output);
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+      try {
+        input.close();
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+      try {
+        output.close();
+      } catch (IOException e) {
+        e.printStackTrace();
+      }
+    });
+    t.start();
+    return t;
+  }
+
+  String runClangFormatOn(String source)
+      throws IOException, InterruptedException {
+    String cmd[] = new String[] { "clang-format" };
+
+    Process process = ProcessUtils.exec(cmd);
+    ByteArrayOutputStream result = new ByteArrayOutputStream();
+    ByteArrayInputStream dataOut = new ByteArrayInputStream(source.getBytes());
+    Thread out = copyAndClose(process.getInputStream(), result);
+    Thread err = copyAndClose(process.getErrorStream(),
+                              NullOutputStream.getInstance());
+    Thread in = copyAndClose(dataOut, process.getOutputStream());
+    /* int r = */process.waitFor();
+    in.join();
+    out.join();
+    err.join();
+    return result.toString();
+  }
+}

app/src/processing/app/Editor.java

@@ -981,24 +981,21 @@ private Tool getOrCreateToolInstance(String className) {
   }
 
   private void addInternalTools(JMenu menu) {
-    JMenuItem item;
-
-    item = createToolMenuItem("cc.arduino.packages.formatter.AStyle");
-    if (item == null) {
-      throw new NullPointerException("Tool cc.arduino.packages.formatter.AStyle unavailable");
+    JMenuItem formatItem = createToolMenuItem("cc.arduino.packages.formatter.clangformat.ClangFormat");
+    if (formatItem == null) {
+      throw new NullPointerException("Tool cc.arduino.packages.formatter.clangformat.ClangFormat");
     }
-    item.setName("menuToolsAutoFormat");
+    formatItem.setName("menuToolsAutoFormat");
     int modifiers = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
-    item.setAccelerator(KeyStroke.getKeyStroke('T', modifiers));
-    menu.add(item);
+    formatItem.setAccelerator(KeyStroke.getKeyStroke('T', modifiers));
+    menu.add(formatItem);
 
-    //menu.add(createToolMenuItem("processing.app.tools.CreateFont"));
-    //menu.add(createToolMenuItem("processing.app.tools.ColorSelector"));
+    // menu.add(createToolMenuItem("processing.app.tools.CreateFont"));
+    // menu.add(createToolMenuItem("processing.app.tools.ColorSelector"));
     menu.add(createToolMenuItem("processing.app.tools.Archiver"));
     menu.add(createToolMenuItem("processing.app.tools.FixEncoding"));
   }
 
-
   private void selectSerialPort(String name) {
     if(portMenu == null) {
       System.out.println(tr("serialMenu is null"));