1 files changed, 95 insertions, 0 deletions
diff --git a/plugins/editorconfig/src/org/editorconfig/configmanagement/LineEndingsManager.java b/plugins/editorconfig/src/org/editorconfig/configmanagement/LineEndingsManager.java
new file mode 100644
index 000000000000..1291ffd297f0
--- /dev/null
+++ b/plugins/editorconfig/src/org/editorconfig/configmanagement/LineEndingsManager.java
@@ -0,0 +1,95 @@
+package org.editorconfig.configmanagement;
+
+import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.editor.Document;
+import com.intellij.openapi.fileEditor.FileDocumentManager;
+import com.intellij.openapi.fileEditor.FileDocumentManagerAdapter;
+import com.intellij.openapi.fileEditor.FileEditorManager;
+import com.intellij.openapi.fileEditor.FileEditorManagerEvent;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.openapi.wm.IdeFrame;
+import com.intellij.openapi.wm.StatusBar;
+import com.intellij.openapi.wm.StatusBarWidget;
+import com.intellij.openapi.wm.WindowManager;
+import com.intellij.openapi.wm.impl.status.LineSeparatorPanel;
+import com.intellij.util.LineSeparator;
+import org.editorconfig.Utils;
+import org.editorconfig.core.EditorConfig;
+import org.editorconfig.plugincomponents.SettingsProviderComponent;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.Locale;
+
+/**
+ * @author Dennis.Ushakov
+ */
+public class LineEndingsManager extends FileDocumentManagerAdapter {
+  // Handles the following EditorConfig settings:
+  private static final String lineEndingsKey = "end_of_line";
+
+  private final Logger LOG = Logger.getInstance("#org.editorconfig.codestylesettings.LineEndingsManager");
+  private final Project project;
+  private boolean statusBarUpdated = false;
+
+  public LineEndingsManager(Project project) {
+    this.project = project;
+  }
+
+  @Override
+  public void beforeAllDocumentsSaving() {
+    statusBarUpdated = false;
+  }
+
+  private void updateStatusBar() {
+    ApplicationManager.getApplication().invokeLater(new Runnable() {
+      @Override
+      public void run() {
+        IdeFrame frame = WindowManager.getInstance().getIdeFrame(project);
+        StatusBar statusBar = frame.getStatusBar();
+        StatusBarWidget widget = statusBar != null ? statusBar.getWidget("LineSeparator") : null;
+
+        if (widget instanceof LineSeparatorPanel) {
+          FileEditorManagerEvent event = new FileEditorManagerEvent(FileEditorManager.getInstance(project),
+                                                                    null, null, null, null);
+          ((LineSeparatorPanel)widget).selectionChanged(event);
+        }
+      }
+    });
+  }
+
+  @Override
+  public void beforeDocumentSaving(@NotNull Document document) {
+    VirtualFile file = FileDocumentManager.getInstance().getFile(document);
+    applySettings(file);
+  }
+
+  private void applySettings(VirtualFile file) {
+    if (file == null || !file.isInLocalFileSystem()) return;
+
+    final String filePath = file.getCanonicalPath();
+    final List<EditorConfig.OutPair> outPairs = SettingsProviderComponent.getInstance().getOutPairs(filePath);
+    final String lineEndings = Utils.configValueForKey(outPairs, lineEndingsKey);
+    if (!lineEndings.isEmpty()) {
+      try {
+        LineSeparator separator = LineSeparator.valueOf(lineEndings.toUpperCase(Locale.US));
+        String oldSeparator = file.getDetectedLineSeparator();
+        String newSeparator = separator.getSeparatorString();
+        if (!StringUtil.equals(oldSeparator, newSeparator)) {
+          file.setDetectedLineSeparator(newSeparator);
+          if (!statusBarUpdated) {
+            statusBarUpdated = true;
+            updateStatusBar();
+          }
+          LOG.debug(Utils.appliedConfigMessage(lineEndings, lineEndingsKey, filePath));
+        }
+      }
+      catch (IllegalArgumentException e) {
+        LOG.warn(Utils.invalidConfigMessage(lineEndings, lineEndingsKey, filePath));
+      }
+    }
+  }
+}