feat: support to set transparency (#446)

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

@@ -421,6 +421,13 @@ class Database private constructor(private val env: Environment) : Disposable {
             }
         }
 
+        protected inner class DoublePropertyDelegate(defaultValue: Double) :
+            PropertyDelegate<Double>(defaultValue) {
+            override fun convertValue(value: String): Double {
+                return value.toDoubleOrNull() ?: initializer.invoke()
+            }
+        }
+
 
         protected inner class LongPropertyDelegate(defaultValue: Long) :
             PropertyDelegate<Long>(defaultValue) {
@@ -632,6 +639,11 @@ class Database private constructor(private val env: Environment) : Disposable {
             I18n.containsLanguage(Locale.getDefault()) ?: Locale.US.toString()
         }
 
+
+        /**
+         * 透明度
+         */
+        var opacity by DoublePropertyDelegate(1.0)
     }
 
     /**

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

@@ -0,0 +1,7 @@
+package app.termora
+
+import java.util.*
+
+interface NotifyListener : EventListener {
+    fun addNotify()
+}

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

@@ -61,6 +61,7 @@ import java.nio.charset.StandardCharsets
 import java.util.*
 import java.util.function.Consumer
 import javax.swing.*
+import javax.swing.JSpinner.NumberEditor
 import javax.swing.event.DocumentEvent
 import javax.swing.event.PopupMenuEvent
 import javax.swing.event.PopupMenuListener
@@ -131,6 +132,8 @@ class SettingsOptionsPane : OptionsPane() {
         val backgroundComBoBox = YesOrNoComboBox()
         val followSystemCheckBox = JCheckBox(I18n.getString("termora.settings.appearance.follow-system"))
         val preferredThemeBtn = JButton(Icons.settings)
+        val opacitySpinner = NumberSpinner(100, 0, 100)
+
         private val appearance get() = database.appearance
 
         init {
@@ -140,6 +143,21 @@ class SettingsOptionsPane : OptionsPane() {
 
         private fun initView() {
 
+            backgroundComBoBox.isEnabled = SystemInfo.isWindows
+
+            opacitySpinner.isEnabled = SystemInfo.isMacOS || SystemInfo.isWindows
+            opacitySpinner.model = object : SpinnerNumberModel(appearance.opacity, 0.1, 1.0, 0.1) {
+                override fun getNextValue(): Any {
+                    return super.getNextValue() ?: maximum
+                }
+
+                override fun getPreviousValue(): Any {
+                    return super.getPreviousValue() ?: minimum
+                }
+            }
+            opacitySpinner.editor = NumberEditor(opacitySpinner, "#.##")
+            opacitySpinner.model.stepSize = 0.05
+
             followSystemCheckBox.isSelected = appearance.followSystem
             preferredThemeBtn.isEnabled = followSystemCheckBox.isSelected
             backgroundComBoBox.selectedItem = appearance.backgroundRunning
@@ -179,6 +197,14 @@ class SettingsOptionsPane : OptionsPane() {
                 }
             }
 
+            opacitySpinner.addChangeListener {
+                val opacity = opacitySpinner.value
+                if (opacity is Double) {
+                    TermoraFrameManager.getInstance().setOpacity(opacity)
+                    appearance.opacity = opacity
+                }
+            }
+
             backgroundComBoBox.addItemListener {
                 if (it.stateChange == ItemEvent.SELECTED) {
                     appearance.backgroundRunning = backgroundComBoBox.selectedItem as Boolean
@@ -283,7 +309,7 @@ class SettingsOptionsPane : OptionsPane() {
         private fun getFormPanel(): JPanel {
             val layout = FormLayout(
                 "left:pref, $formMargin, default:grow, $formMargin, default, default:grow",
-                "pref, $formMargin, pref, $formMargin, pref"
+                "pref, $formMargin, pref, $formMargin, pref, $formMargin, pref"
             )
             val box = FlatToolBar()
             box.add(followSystemCheckBox)
@@ -304,10 +330,12 @@ class SettingsOptionsPane : OptionsPane() {
                     }
                 })).xy(5, rows).apply { rows += step }
 
-            if (SystemInfo.isWindows) {
+
-                builder.add("${I18n.getString("termora.settings.appearance.background-running")}:").xy(1, rows)
+            builder.add("${I18n.getString("termora.settings.appearance.opacity")}:").xy(1, rows)
-                    .add(backgroundComBoBox).xy(3, rows)
+                .add(opacitySpinner).xy(3, rows).apply { rows += step }
-            }
+
+            builder.add("${I18n.getString("termora.settings.appearance.background-running")}:").xy(1, rows)
+                .add(backgroundComBoBox).xy(3, rows)
 
             return builder.build()
         }

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

@@ -9,6 +9,7 @@ import app.termora.terminal.DataKey
 import com.formdev.flatlaf.FlatClientProperties
 import com.formdev.flatlaf.util.SystemInfo
 import com.jetbrains.JBR
+import org.apache.commons.lang3.ArrayUtils
 import java.awt.BorderLayout
 import java.awt.Dimension
 import java.awt.Insets
@@ -24,6 +25,7 @@ import javax.swing.SwingUtilities
 import javax.swing.SwingUtilities.isEventDispatchThread
 import javax.swing.UIManager
 
+
 fun assertEventDispatchThread() {
     if (!isEventDispatchThread()) throw WrongThreadException("AWT EventQueue")
 }
@@ -41,6 +43,7 @@ class TermoraFrame : JFrame(), DataProvider {
     private val welcomePanel = WelcomePanel(windowScope)
     private val sftp get() = Database.getDatabase().sftp
     private val myUI = MyFlatRootPaneUI()
+    private var notifyListeners = emptyArray<NotifyListener>()
 
 
     init {
@@ -239,4 +242,16 @@ class TermoraFrame : JFrame(), DataProvider {
         return id.hashCode()
     }
 
+    fun addNotifyListener(listener: NotifyListener) {
+        notifyListeners += listener
+    }
+
+    fun removeNotifyListener(listener: NotifyListener) {
+        notifyListeners = ArrayUtils.removeElements(notifyListeners, listener)
+    }
+
+    override fun addNotify() {
+        super.addNotify()
+        notifyListeners.forEach { it.addNotify() }
+    }
 }

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

@@ -1,8 +1,18 @@
 package app.termora
 
+import app.termora.native.osx.NativeMacLibrary
+import com.formdev.flatlaf.ui.FlatNativeWindowsLibrary
 import com.formdev.flatlaf.util.SystemInfo
+import com.sun.jna.Pointer
+import com.sun.jna.platform.win32.User32
+import com.sun.jna.platform.win32.WinDef
+import com.sun.jna.platform.win32.WinUser.*
+import de.jangassen.jfa.ThreadUtils
+import de.jangassen.jfa.foundation.Foundation
+import de.jangassen.jfa.foundation.ID
 import org.slf4j.LoggerFactory
 import java.awt.Frame
+import java.awt.Window
 import java.awt.event.WindowAdapter
 import java.awt.event.WindowEvent
 import javax.swing.JFrame
@@ -13,6 +23,7 @@ import javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE
 import kotlin.math.max
 import kotlin.system.exitProcess
 
+
 class TermoraFrameManager {
 
     companion object {
@@ -51,6 +62,15 @@ class TermoraFrameManager {
             }
         }
 
+        frame.addNotifyListener(object : NotifyListener {
+            private val opacity get() = Database.getDatabase().appearance.opacity
+            override fun addNotify() {
+                val opacity = this.opacity
+                if (opacity >= 1.0) return
+                setOpacity(frame, opacity)
+            }
+        })
+
         return frame.apply { frames.add(this) }
     }
 
@@ -153,6 +173,31 @@ class TermoraFrameManager {
         return FrameRectangle(x, y, w, h, s)
     }
 
+    fun setOpacity(opacity: Double) {
+        if (opacity < 0 || opacity > 1 || SystemInfo.isLinux) return
+        for (window in getWindows()) {
+            setOpacity(window, opacity)
+        }
+    }
+
+    private fun setOpacity(window: Window, opacity: Double) {
+        if (SystemInfo.isMacOS) {
+            val nsWindow = ID(NativeMacLibrary.getNSWindow(window) ?: return)
+            ThreadUtils.dispatch_async {
+                Foundation.invoke(nsWindow, "setOpaque:", false)
+                Foundation.invoke(nsWindow, "setAlphaValue:", opacity)
+            }
+        } else if (SystemInfo.isWindows) {
+            val alpha = ((opacity * 255).toInt() and 0xFF).toByte()
+            val hwnd = WinDef.HWND(Pointer.createConstant(FlatNativeWindowsLibrary.getHWND(window)))
+            val exStyle = User32.INSTANCE.GetWindowLong(hwnd, User32.GWL_EXSTYLE)
+            if (exStyle and WS_EX_LAYERED == 0) {
+                User32.INSTANCE.SetWindowLong(hwnd, GWL_EXSTYLE, exStyle or WS_EX_LAYERED)
+            }
+            User32.INSTANCE.SetLayeredWindowAttributes(hwnd, 0, alpha, LWA_ALPHA)
+        }
+    }
+
     private data class FrameRectangle(
         val x: Int, val y: Int, val w: Int, val h: Int, val s: Int
     ) {

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

@@ -146,7 +146,7 @@ open class EmailFormattedTextField(var maxLength: Int = Int.MAX_VALUE) : Outline
 }
 
 
-abstract class NumberSpinner(
+open class NumberSpinner(
     value: Int,
     minimum: Int,
     maximum: Int,

src/main/resources/i18n/messages.properties

@@ -54,6 +54,7 @@ termora.settings.appearance.theme=Theme
 termora.settings.appearance.language=Language
 termora.settings.appearance.i-want-to-translate=I want to translate
 termora.settings.appearance.follow-system=Sync with OS
+termora.settings.appearance.opacity=Opacity
 termora.settings.appearance.background-running=Backgrounding
 
 termora.setting.security=Security

src/main/resources/i18n/messages_zh_CN.properties

@@ -51,6 +51,7 @@ termora.settings.appearance.theme=主题
 termora.settings.appearance.language=语言
 termora.settings.appearance.i-want-to-translate=我想要翻译
 termora.settings.appearance.follow-system=跟随系统
+termora.settings.appearance.opacity=透明度
 termora.settings.appearance.background-running=后台运行
 
 termora.setting.security=安全

src/main/resources/i18n/messages_zh_TW.properties

@@ -52,6 +52,7 @@ termora.settings.appearance.theme=主题
 termora.settings.appearance.language=語言
 termora.settings.appearance.i-want-to-translate=我想要翻譯
 termora.settings.appearance.follow-system=跟隨系統
+termora.settings.appearance.opacity=透明度
 termora.settings.appearance.background-running=後台運行
 
 termora.setting.security=安全