feat(gui): add auto dev insert to code action

Added a new file `AutoDevInsertToCodeAction.kt` in the `cc.unitmesh.devti.gui.snippet` package. This action allows users to insert selected or all text into the editor. It handles both selection and non-selection scenarios and inserts text at the correct offset. The action is enabled and visible only if the selected text editor is writable.

java/src/main/kotlin/cc/unitmesh/idea/provider/JavaVersionProvider.kt

@@ -5,6 +5,7 @@ import cc.unitmesh.devti.provider.context.ChatContextProvider
 import cc.unitmesh.devti.provider.context.ChatCreationContext
 import cc.unitmesh.idea.detectLanguageLevel
 import com.intellij.lang.java.JavaLanguage
+import com.intellij.openapi.application.runReadAction
 import com.intellij.openapi.module.Module
 import com.intellij.openapi.module.ModuleUtilCore
 import com.intellij.openapi.project.Project

src/233/main/resources/META-INF/autodev-core.xml

@@ -291,6 +291,9 @@
             <action id="AutoDev.ToolWindow.Snippet.CopyToClipboard"
                     icon="AllIcons.Actions.Copy"
                     class="cc.unitmesh.devti.gui.snippet.AutoDevCopyToClipboardAction"/>
+            <action id="AutoDev.ToolWindow.Snippet.InsertFile"
+                    icon="cc.unitmesh.devti.AutoDevIcons.InsertCode"
+                    class="cc.unitmesh.devti.gui.snippet.AutoDevInsertFileAction"/>
         </group>
 
         <group id="AutoDev.ToolWindow.Chat.TitleActions">

src/main/kotlin/cc/unitmesh/devti/AutoDevIcons.kt

@@ -37,4 +37,7 @@ object AutoDevIcons {
 
     @JvmField
     val Disliked: Icon = IconLoader.getIcon("/icons/disliked.svg", AutoDevIcons::class.java)
+
+    @JvmField
+    val InsertCode: Icon = IconLoader.getIcon("/icons/insert-code.svg", AutoDevIcons::class.java)
 }

src/main/kotlin/cc/unitmesh/devti/gui/snippet/AutoDevInsertToCodeAction.kt

@@ -0,0 +1,42 @@
+package cc.unitmesh.devti.gui.snippet
+
+import com.intellij.openapi.actionSystem.ActionUpdateThread
+import com.intellij.openapi.actionSystem.AnActionEvent
+import com.intellij.openapi.command.WriteCommandAction
+import com.intellij.openapi.fileEditor.FileEditorManager
+import com.intellij.openapi.project.DumbAwareAction
+import com.intellij.openapi.util.TextRange
+
+class AutoDevInsertFileAction : DumbAwareAction() {
+    override fun actionPerformed(e: AnActionEvent) {
+        val editor = e.getData(com.intellij.openapi.actionSystem.PlatformDataKeys.EDITOR) ?: return
+        val selectionModel = if (editor.selectionModel.hasSelection()) editor.selectionModel else null
+        val textToPaste = selectionModel?.selectedText ?: editor.document.text.trimEnd()
+
+        val project = e.project ?: return
+
+        val selectedTextEditor = FileEditorManager.getInstance(project).selectedTextEditor
+        WriteCommandAction.writeCommandAction(project).compute<TextRange, RuntimeException> {
+            val offset = selectionModel?.selectionStart ?: selectedTextEditor?.document?.textLength ?: return@compute null
+            selectedTextEditor?.document?.insertString(offset, textToPaste)
+            TextRange.from(offset, textToPaste.length)
+        }
+    }
+
+    override fun update(e: AnActionEvent) {
+        val project = e.project
+        if (project == null) {
+            e.presentation.isEnabled = false
+            return
+        }
+
+        val selectedTextEditor = FileEditorManager.getInstance(project).selectedTextEditor
+        if (selectedTextEditor == null || !selectedTextEditor.document.isWritable) {
+            e.presentation.isEnabled = false
+        } else {
+            e.presentation.isEnabledAndVisible = true
+        }
+    }
+
+    override fun getActionUpdateThread(): ActionUpdateThread = ActionUpdateThread.BGT
+}