feat: support drag and drop sorting

src/main/kotlin/app/termora/MyTabbedPane.kt

@@ -1,12 +1,162 @@
 package app.termora
 
+import app.termora.actions.AnActionEvent
+import app.termora.actions.DataProviders
 import com.formdev.flatlaf.extras.components.FlatTabbedPane
+import org.apache.commons.lang3.StringUtils
+import java.awt.*
+import java.awt.event.*
+import java.awt.image.BufferedImage
+import java.util.*
+import javax.swing.ImageIcon
+import javax.swing.JDialog
+import javax.swing.JLabel
+import javax.swing.SwingUtilities
+import kotlin.math.abs
 
 class MyTabbedPane : FlatTabbedPane() {
+
+    private val owner: Window get() = SwingUtilities.getWindowAncestor(this)
+    private val dragMouseAdaptor = DragMouseAdaptor()
+    private val terminalTabbedManager
+        get() = AnActionEvent(this, StringUtils.EMPTY, EventObject(this))
+            .getData(DataProviders.TerminalTabbedManager)
+
+    init {
+        initEvents()
+    }
+
+
+    private fun initEvents() {
+        addMouseListener(dragMouseAdaptor)
+        addMouseMotionListener(dragMouseAdaptor)
+    }
+
     override fun setSelectedIndex(index: Int) {
         val oldIndex = selectedIndex
         super.setSelectedIndex(index)
         firePropertyChange("selectedIndex", oldIndex, index)
     }
 
+
+    private inner class DragMouseAdaptor : MouseAdapter(), KeyEventDispatcher {
+        private var mousePressedPoint = Point()
+        private var tabIndex = 0 - 1
+        private var cancelled = false
+        private var window: Window? = null
+        private var terminalTab: TerminalTab? = null
+        private var isDragging = false
+        private var lastVisitTabIndex = -1
+
+        override fun mousePressed(e: MouseEvent) {
+            val index = indexAtLocation(e.x, e.y)
+            if (index < 0 || !isTabClosable(index)) {
+                return
+            }
+            tabIndex = index
+            mousePressedPoint = e.point
+        }
+
+        override fun mouseDragged(e: MouseEvent) {
+            // 如果正在拖拽中，那么修改 Window 的位置
+            if (isDragging) {
+                window?.location = e.locationOnScreen
+                lastVisitTabIndex = indexAtLocation(e.x, e.y)
+            } else if (tabIndex >= 0) { // 这里之所以判断是确保在 mousePressed 时已经确定了 Tab
+                // 有的时候会太灵敏，这里容错一下
+                val diff = 5
+                if (abs(mousePressedPoint.y - e.y) >= diff || abs(mousePressedPoint.x - e.x) >= diff) {
+                    startDrag(e)
+                }
+            }
+        }
+
+        private fun startDrag(e: MouseEvent) {
+            if (isDragging) return
+            val terminalTabbedManager = terminalTabbedManager ?: return
+            val window = JDialog(owner).also { this.window = it }
+            window.isUndecorated = true
+            val image = createTabImage(tabIndex)
+            window.size = Dimension(image.width, image.height)
+            window.add(JLabel(ImageIcon(image)))
+            window.location = e.locationOnScreen
+            window.addWindowListener(object : WindowAdapter() {
+                override fun windowClosed(e: WindowEvent) {
+                    KeyboardFocusManager.getCurrentKeyboardFocusManager()
+                        .removeKeyEventDispatcher(this@DragMouseAdaptor)
+                }
+
+                override fun windowOpened(e: WindowEvent) {
+                    KeyboardFocusManager.getCurrentKeyboardFocusManager()
+                        .addKeyEventDispatcher(this@DragMouseAdaptor)
+                }
+            })
+
+            // 暂时关闭 Tab
+            terminalTabbedManager.closeTerminalTab(terminalTabbedManager.getTerminalTabs()[tabIndex].also {
+                terminalTab = it
+            }, false)
+
+            window.isVisible = true
+
+            isDragging = true
+            cancelled = false
+        }
+
+        private fun stopDrag() {
+            if (!isDragging) {
+                return
+            }
+
+            val tab = this.terminalTab
+            val terminalTabbedManager = terminalTabbedManager
+
+            if (tab != null && terminalTabbedManager != null) {
+                // 如果是手动取消
+                if (cancelled) {
+                    terminalTabbedManager.addTerminalTab(tabIndex, tab)
+                } else if (lastVisitTabIndex > 0) {
+                    terminalTabbedManager.addTerminalTab(lastVisitTabIndex, tab)
+                } else if (lastVisitTabIndex == 0) {
+                    terminalTabbedManager.addTerminalTab(1, tab)
+                } else {
+                    terminalTabbedManager.addTerminalTab(tab)
+                }
+            }
+
+            // reset
+            window?.dispose()
+            isDragging = false
+            tabIndex = -1
+            cancelled = false
+            lastVisitTabIndex = -1
+        }
+
+        override fun mouseReleased(e: MouseEvent) {
+            stopDrag()
+        }
+
+        private fun createTabImage(index: Int): BufferedImage {
+            val tabBounds = getBoundsAt(index)
+            val image = BufferedImage(tabBounds.width, tabBounds.height, BufferedImage.TYPE_INT_ARGB)
+            val g2 = image.createGraphics()
+            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)
+            g2.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY)
+            g2.translate(-tabBounds.x, -tabBounds.y)
+            paint(g2)
+            g2.dispose()
+            return image
+        }
+
+        override fun dispatchKeyEvent(e: KeyEvent): Boolean {
+            if (e.keyCode == KeyEvent.VK_ESCAPE) {
+                cancelled = true
+                stopDrag()
+                return true
+            }
+            return false
+        }
+    }
+
+
 }

src/main/kotlin/app/termora/TerminalTabbed.kt

@@ -10,12 +10,14 @@ import app.termora.transport.TransportPanel
 import com.formdev.flatlaf.FlatLaf
 import com.formdev.flatlaf.extras.components.FlatPopupMenu
 import com.formdev.flatlaf.extras.components.FlatTabbedPane
+import org.apache.commons.lang3.StringUtils
 import java.awt.*
 import java.awt.event.AWTEventListener
 import java.awt.event.ActionEvent
 import java.awt.event.MouseAdapter
 import java.awt.event.MouseEvent
 import java.beans.PropertyChangeListener
+import java.util.*
 import javax.swing.*
 import javax.swing.JTabbedPane.SCROLL_TAB_LAYOUT
 import kotlin.math.min
@@ -30,7 +32,7 @@ class TerminalTabbed(
     private val toolbar = termoraToolBar.getJToolBar()
     private val actionManager = ActionManager.getInstance()
     private val dataProviderSupport = DataProviderSupport()
-
+    private val titleProperty = UUID.randomUUID().toSimpleString()
     private val iconListener = PropertyChangeListener { e ->
         val source = e.source
         if (e.propertyName == "icon" && source is TerminalTab) {
@@ -190,16 +192,16 @@ class TerminalTabbed(
         // 修改名称
         val rename = popupMenu.add(I18n.getString("termora.tabbed.contextmenu.rename"))
         rename.addActionListener {
-            val index = tabbedPane.selectedIndex
+            if (tabIndex > 0) {
-            if (index > 0) {
                 val dialog = InputDialog(
                     SwingUtilities.getWindowAncestor(this),
                     title = rename.text,
-                    text = tabbedPane.getTitleAt(index),
+                    text = tabbedPane.getTitleAt(tabIndex),
                 )
                 val text = dialog.getText()
                 if (!text.isNullOrBlank()) {
-                    tabbedPane.setTitleAt(index, text)
+                    tabbedPane.setTitleAt(tabIndex, text)
+                    c.putClientProperty(titleProperty, text)
                 }
             }
 
@@ -276,9 +278,8 @@ class TerminalTabbed(
             popupMenu.addSeparator()
             val reconnect = popupMenu.add(I18n.getString("termora.tabbed.contextmenu.reconnect"))
             reconnect.addActionListener {
-                val index = tabbedPane.selectedIndex
+                if (tabIndex > 0) {
-                if (index > 0) {
+                    tabs[tabIndex].reconnect()
-                    tabs[index].reconnect()
                 }
             }
 
@@ -289,18 +290,24 @@ class TerminalTabbed(
     }
 
 
-    fun addTab(tab: TerminalTab) {
+    private fun addTab(index: Int, tab: TerminalTab) {
-        tabbedPane.addTab(
+        val c = tab.getJComponent()
-            tab.getTitle(),
+        val title = (c.getClientProperty(titleProperty) ?: tab.getTitle()).toString()
+
+        tabbedPane.insertTab(
+            title,
             tab.getIcon(),
-            tab.getJComponent()
+            c,
+            StringUtils.EMPTY,
+            index
         )
+        c.putClientProperty(titleProperty, title)
 
         // 监听 icons 变化
         tab.addPropertyChangeListener(iconListener)
 
-        tabs.add(tab)
+        tabs.add(index, tab)
-        tabbedPane.selectedIndex = tabbedPane.tabCount - 1
+        tabbedPane.selectedIndex = index
         Disposer.register(this, tab)
     }
 
@@ -393,7 +400,11 @@ class TerminalTabbed(
     }
 
     override fun addTerminalTab(tab: TerminalTab) {
-        addTab(tab)
+        addTab(tabs.size, tab)
+    }
+
+    override fun addTerminalTab(index: Int, tab: TerminalTab) {
+        addTab(index, tab)
     }
 
     override fun getSelectedTerminalTab(): TerminalTab? {
@@ -418,10 +429,10 @@ class TerminalTabbed(
         }
     }
 
-    override fun closeTerminalTab(tab: TerminalTab) {
+    override fun closeTerminalTab(tab: TerminalTab, disposable: Boolean) {
         for (i in 0 until tabs.size) {
             if (tabs[i] == tab) {
-                removeTabAt(i, true)
+                removeTabAt(i, disposable)
                 break
             }
         }

src/main/kotlin/app/termora/TerminalTabbedManager.kt

@@ -2,8 +2,9 @@ package app.termora
 
 interface TerminalTabbedManager {
     fun addTerminalTab(tab: TerminalTab)
+    fun addTerminalTab(index: Int, tab: TerminalTab)
     fun getSelectedTerminalTab(): TerminalTab?
     fun getTerminalTabs(): List<TerminalTab>
     fun setSelectedTerminalTab(tab: TerminalTab)
-    fun closeTerminalTab(tab: TerminalTab)
+    fun closeTerminalTab(tab: TerminalTab, disposable: Boolean = true)
 }

src/main/kotlin/app/termora/TermoraFrame.kt

@@ -101,7 +101,7 @@ class TermoraFrame : JFrame(), DataProvider {
         }
 
         minimumSize = Dimension(640, 400)
-        terminalTabbed.addTab(welcomePanel)
+        terminalTabbed.addTerminalTab(welcomePanel)
 
         // macOS 要避开左边的控制栏
         if (SystemInfo.isMacOS) {