Make amount of code completion shortcuts customizable

build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 }
 
 group = "com.chylex.intellij.keyboardmaster"
-version = "0.1.1"
+version = "0.1.2"
 
 repositories {
     mavenCentral()

src/main/kotlin/com/chylex/intellij/keyboardmaster/configuration/PluginConfigurable.kt

@@ -0,0 +1,46 @@
+package com.chylex.intellij.keyboardmaster.configuration
+
+import com.intellij.openapi.options.Configurable
+import com.intellij.ui.components.JBTextField
+import com.intellij.ui.layout.panel
+import javax.swing.JComponent
+
+class PluginConfigurable : Configurable {
+	private lateinit var component: JComponent
+	
+	private val codeCompletionItemShortcuts = JBTextField(20)
+	private val codeCompletionNextPageShortcut = JBTextField(2)
+	
+	override fun getDisplayName(): String {
+		return "Keyboard Master"
+	}
+	
+	override fun createComponent(): JComponent {
+		component = panel {
+			titledRow("Code Completion") {
+				row("Item shortcuts:") { component(codeCompletionItemShortcuts) }
+				row("Next page shortcut:") { component(codeCompletionNextPageShortcut) }
+			}
+		}
+		
+		return component
+	}
+	
+	override fun isModified(): Boolean {
+		return true
+	}
+	
+	override fun apply() {
+		PluginConfiguration.modify {
+			it.codeCompletionItemShortcuts = codeCompletionItemShortcuts.text
+			it.codeCompletionNextPageShortcut = codeCompletionNextPageShortcut.text.firstOrNull()?.code ?: 0
+		}
+	}
+	
+	override fun reset() {
+		PluginConfiguration.read {
+			codeCompletionItemShortcuts.text = it.codeCompletionItemShortcuts
+			codeCompletionNextPageShortcut.text = it.codeCompletionNextPageShortcut.let { code -> if (code == 0) "" else code.toChar().toString() }
+		}
+	}
+}

src/main/kotlin/com/chylex/intellij/keyboardmaster/configuration/PluginConfiguration.kt

@@ -0,0 +1,46 @@
+package com.chylex.intellij.keyboardmaster.configuration
+
+import com.chylex.intellij.keyboardmaster.lookup.ProjectLookupListener
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.components.PersistentStateComponent
+import com.intellij.openapi.components.State
+import com.intellij.openapi.components.Storage
+import com.intellij.util.xmlb.XmlSerializerUtil
+
+@State(
+	name = "com.chylex.intellij.keyboardmaster.configuration.PluginConfiguration",
+	storages = [Storage("KeyboardMaster.xml")]
+)
+class PluginConfiguration : PersistentStateComponent<PluginConfiguration> {
+	var codeCompletionItemShortcuts = "123456789"
+	var codeCompletionNextPageShortcut: Int = '0'.code
+	
+	companion object {
+		private val instance: PluginConfiguration
+			get() = ApplicationManager.getApplication().getService(PluginConfiguration::class.java)
+		
+		init {
+			instance.apply(this::update)
+		}
+		
+		fun read(callback: (PluginConfiguration) -> Unit) {
+			instance.apply(callback)
+		}
+		
+		fun modify(callback: (PluginConfiguration) -> Unit) {
+			instance.apply(callback).apply(this::update)
+		}
+		
+		private fun update(instance: PluginConfiguration) {
+			ProjectLookupListener.updateShortcuts(instance)
+		}
+	}
+	
+	override fun getState(): PluginConfiguration {
+		return this
+	}
+	
+	override fun loadState(state: PluginConfiguration) {
+		XmlSerializerUtil.copyBean(state, this)
+	}
+}

src/main/kotlin/com/chylex/intellij/keyboardmaster/lookup/LookupTypedActionHandler.kt

@@ -20,7 +20,8 @@ class LookupTypedActionHandler(originalHandler: TypedActionHandler?) : TypedActi
 	}
 	
 	private fun executeImpl(editor: Editor, charTyped: Char): Boolean {
-		if (charTyped !in '0'..'9') {
+		val shortcutItem = ProjectLookupListener.getShortcut(charTyped)
+		if (shortcutItem == -1) {
 			return false
 		}
 		
@@ -31,19 +32,21 @@ class LookupTypedActionHandler(originalHandler: TypedActionHandler?) : TypedActi
 		
 		val offset = ProjectLookupListener.getLookupOffset(lookup)
 		
-		if (charTyped == '0') {
+		if (shortcutItem == 0) {
 			val list = lookup.list
 			val itemCount = list.model.size
-			val topIndex = (offset + 9).let { if (it >= itemCount) 0 else it }
+			
+			val shortcutCount = ProjectLookupListener.itemShortcutCount
+			val topIndex = (offset + shortcutCount).let { if (it >= itemCount) 0 else it }
 			
 			ProjectLookupListener.setLookupOffset(lookup, topIndex)
 			lookup.selectedIndex = topIndex
-			ScrollingUtil.ensureRangeIsVisible(list, topIndex, topIndex + 8)
+			ScrollingUtil.ensureRangeIsVisible(list, topIndex, topIndex + shortcutCount - 1)
 			lookup.markSelectionTouched()
 			lookup.refreshUi(false, true)
 		}
 		else {
-			lookup.selectedIndex = offset + (charTyped - '1')
+			lookup.selectedIndex = offset + shortcutItem - 1
 		}
 		
 		return true

src/main/kotlin/com/chylex/intellij/keyboardmaster/lookup/ProjectLookupListener.kt

@@ -1,10 +1,12 @@
 package com.chylex.intellij.keyboardmaster.lookup
 
+import com.chylex.intellij.keyboardmaster.configuration.PluginConfiguration
 import com.intellij.codeInsight.lookup.Lookup
 import com.intellij.codeInsight.lookup.LookupElementPresentation
 import com.intellij.codeInsight.lookup.LookupManagerListener
 import com.intellij.codeInsight.lookup.impl.LookupImpl
 import com.intellij.openapi.util.Key
+import com.intellij.util.containers.IntIntHashMap
 
 /**
  * Adds hints to code completion items with the digit that selects it.
@@ -14,7 +16,28 @@ class ProjectLookupListener : LookupManagerListener {
 		private val OFFSET_KEY = Key.create<Int>("chylexKeyboardMasterOffset")
 		private val IS_MODIFIED_KEY = Key.create<Boolean>("chylexKeyboardMasterModified")
 		
-		private val HINT_TEXT = Array(9) { " [${it + 1}]" }
+		private var hintTexts = mutableListOf<String>()
+		private val charToShortcutMap = IntIntHashMap(16, -1)
+		
+		val itemShortcutCount
+			get() = hintTexts.size
+		
+		fun updateShortcuts(configuration: PluginConfiguration) {
+			hintTexts.clear()
+			for (char in configuration.codeCompletionItemShortcuts) {
+				hintTexts.add(" [$char]")
+			}
+			
+			charToShortcutMap.clear()
+			configuration.codeCompletionNextPageShortcut.takeUnless { it == 0 }?.let { charToShortcutMap[it] = 0 }
+			for ((index, char) in configuration.codeCompletionItemShortcuts.withIndex()) {
+				charToShortcutMap[char.code] = index + 1
+			}
+		}
+		
+		fun getShortcut(char: Char): Int {
+			return charToShortcutMap[char.code]
+		}
 		
 		fun getLookupOffset(lookup: LookupImpl): Int {
 			val offset = lookup.getUserData(OFFSET_KEY)
@@ -32,7 +55,7 @@ class ProjectLookupListener : LookupManagerListener {
 	}
 	
 	override fun activeLookupChanged(oldLookup: Lookup?, newLookup: Lookup?) {
-		if (newLookup !is LookupImpl || newLookup.getUserData(IS_MODIFIED_KEY) == true) {
+		if (newLookup !is LookupImpl || newLookup.getUserData(IS_MODIFIED_KEY) == true || itemShortcutCount == 0) {
 			return
 		}
 		
@@ -44,8 +67,8 @@ class ProjectLookupListener : LookupManagerListener {
 			val itemCount = itemList.size
 			val offset = getLookupOffset(newLookup)
 			
-			for (digitIndex in 0 until 9) {
-				val itemIndex = offset + digitIndex
+			for (index in hintTexts.indices) {
+				val itemIndex = offset + index
 				if (itemIndex >= itemCount) {
 					break
 				}
@@ -53,7 +76,7 @@ class ProjectLookupListener : LookupManagerListener {
 				if (item === itemList.getElementAt(itemIndex)) {
 					val customized = LookupElementPresentation()
 					customized.copyFrom(presentation)
-					customized.appendTailTextItalic(HINT_TEXT[digitIndex], true)
+					customized.appendTailTextItalic(hintTexts[index], true)
 					return@addPresentationCustomizer customized
 				}
 			}

src/main/resources/META-INF/plugin.xml

@@ -6,7 +6,7 @@
   <description><![CDATA[
     Collection of keyboard-centric additions.
     <ul>
-      <li>Code completion items can be jumped to using numbers.</li>
+      <li>Code completion items can be jumped to using customizable characters (numbers by default).</li>
     </ul>
   ]]></description>
   
@@ -17,6 +17,8 @@
   </projectListeners>
   
   <extensions defaultExtensionNs="com.intellij">
+    <applicationService serviceImplementation="com.chylex.intellij.keyboardmaster.configuration.PluginConfiguration" />
+    <applicationConfigurable parentId="tools" instance="com.chylex.intellij.keyboardmaster.configuration.PluginConfigurable" id="com.chylex.keyboardmaster" />
     <!--suppress PluginXmlValidity, PluginXmlDynamicPlugin -->
     <editorTypedHandler implementationClass="com.chylex.intellij.keyboardmaster.lookup.LookupTypedActionHandler" />
   </extensions>