From b4ef5da317ff2ced206f570cb168c494f4308e36 Mon Sep 17 00:00:00 2001
From: Denis Fokin <denis.fokin@jetbrains.com>
Date: Thu, 16 Aug 2018 18:18:36 +0300
Subject: [PATCH] Show the state in a popup.

Ability to save the state into the clipboard.
---
 ...DumpFocusableComponentHierarchyAction.java | 79 +++++++++++++------
 1 file changed, 56 insertions(+), 23 deletions(-)

diff --git a/platform/platform-impl/src/com/intellij/internal/focus/DumpFocusableComponentHierarchyAction.java b/platform/platform-impl/src/com/intellij/internal/focus/DumpFocusableComponentHierarchyAction.java
index f1c0b0887b86..3a1a361661b1 100644
--- a/platform/platform-impl/src/com/intellij/internal/focus/DumpFocusableComponentHierarchyAction.java
+++ b/platform/platform-impl/src/com/intellij/internal/focus/DumpFocusableComponentHierarchyAction.java
@@ -4,49 +4,82 @@ package com.intellij.internal.focus;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.actionSystem.AnActionEvent;
 import com.intellij.openapi.project.DumbAware;
+import com.intellij.openapi.wm.WindowManager;
+import com.intellij.ui.JBColor;
 import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
 import java.awt.*;
+import java.awt.datatransfer.StringSelection;
+import java.awt.event.ActionEvent;
 import java.util.ArrayList;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 public class DumpFocusableComponentHierarchyAction extends AnAction implements DumbAware {
   @Override
   public void actionPerformed(@NotNull AnActionEvent e) {
-    Util.drawOnActiveFrameGraphics(g -> {
 
-      Window activeWindow = KeyboardFocusManager.getCurrentKeyboardFocusManager().getActiveWindow();
-      Window focusedWindow = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusedWindow();
-      Component focusedComponent = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
+    JFrame visibleFrame = WindowManager.getInstance().findVisibleFrame();
+    Window activeWindow = KeyboardFocusManager.getCurrentKeyboardFocusManager().getActiveWindow();
+    Window focusedWindow = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusedWindow();
+    Component focusedComponent = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
 
-      int y = 0;
-      int FONT_HEIGHT = 30;
+    CopyOnWriteArrayList<String> dump = new CopyOnWriteArrayList<>();
 
-      g.setColor(Color.BLACK);
-      g.fillRect(0,0, activeWindow.getBounds().width, activeWindow.getBounds().height);
-      g.setColor(Color.WHITE);
-      g.drawString("Active Window: " + activeWindow.getClass().getName(), 0, FONT_HEIGHT*y++);
-      g.drawString("Focused Window: " + focusedWindow.getClass().getName(), 0, FONT_HEIGHT*y++);
-      g.drawString("Focused Component: " + focusedComponent.getClass().getName(), 0, 60);
+    dump.add("Active Window: " +  activeWindow.getClass().getName());
+    dump.add("Focused Window: " + (focusedWindow == null ? "null" : focusedWindow.getClass().getName()));
+    dump.add("Focused Component: " + (focusedComponent == null ? "null" : focusedComponent.getClass().getName()));
 
-      ArrayList<Component> componentTrace = new ArrayList<>();
+    ArrayList<Component> componentTrace = new ArrayList<>();
 
-      Component c = focusedComponent;
+    Component c = focusedComponent;
 
-      while (c != null) {
-        componentTrace.add(c);
-        c = c.getParent();
+    while (c != null) {
+      componentTrace.add(c);
+      c = c.getParent();
+    }
+
+    for (int i = componentTrace.size() - 1; i >= 0; i--) {
+      dump.add(componentTrace.get(i).getClass().getName());
+      if (i != 0) {
+        dump.add("^");
       }
+    }
 
-      y++;
+    dump.add("Children count in focused component: " + (focusedComponent == null ? "null" : ((JComponent)focusedComponent).getComponentCount()));
 
-      for (int i = componentTrace.size() - 1 ; i >= 0; i--) {
-        g.drawString(componentTrace.get(i).getClass().getName(), 0, FONT_HEIGHT*y++);
-        g.drawString("^", 0, FONT_HEIGHT*y + 15);
+    JPanel jPanel = new JPanel(new BorderLayout()) {
+      @Override
+      protected void paintComponent(Graphics g) {
+        super.paintComponent(g);
+
+        int FONT_HEIGHT = 30;
+
+        g.setColor(JBColor.BLACK);
+        g.fillRect(0, 0, activeWindow.getBounds().width, activeWindow.getBounds().height);
+        g.setColor(JBColor.WHITE);
+
+        for (int i = dump.size() - 1; i >= 0; i --) {
+          g.drawString(dump.get(i), 20, 50 + (i * FONT_HEIGHT));
+        }
       }
+    };
 
-      g.drawString("Children count in focused component: " + ((JComponent)focusedComponent).getComponentCount(), 0, FONT_HEIGHT * y);
+    jPanel.setPreferredSize(visibleFrame.getSize());
 
-    });
+    Popup popup = PopupFactory.getSharedInstance().getPopup(visibleFrame, jPanel, visibleFrame.getX(), visibleFrame.getY());
+    popup.show();
+
+    jPanel.add(new JButton(new AbstractAction("Close and copy into the clipboard") {
+      @Override
+      public void actionPerformed(ActionEvent e) {
+        StringBuilder dumpAsString = new StringBuilder();
+        for (int i = dump.size() - 1; i >= 0; i --) {
+          dumpAsString.append(dump.get(i)).append("\n");
+        }
+        Toolkit.getDefaultToolkit().getSystemClipboard().setContents(new StringSelection(dumpAsString.toString()), null);
+        popup.hide();
+      }
+    }), BorderLayout.SOUTH);
   }
 }