IJPL-187184: cleanup: move from companion to util

IJ-MR-165674

GitOrigin-RevId: 135936ea938c8d716e74764074ca6eb4c2d4d11c

platform/diff-impl/api-dump.txt

@@ -231,20 +231,12 @@ com.intellij.diff.editor.DiffContentVirtualFile
 com.intellij.diff.editor.DiffEditorEscapeAction
 com.intellij.diff.editor.DiffEditorTabFilesManager
 - sf:Companion:com.intellij.diff.editor.DiffEditorTabFilesManager$Companion
-- sf:SHOW_DIFF_IN_EDITOR_SETTING:java.lang.String
 - s:getInstance(com.intellij.openapi.project.Project):com.intellij.diff.editor.DiffEditorTabFilesManager
-- s:isDiffInEditor():Z
-- s:isDiffInWindow():Z
 - a:isDiffOpenedInWindow(com.intellij.openapi.vfs.VirtualFile):Z
-- s:setDiffInEditor(Z):V
 - showDiffFile(com.intellij.openapi.vfs.VirtualFile,Z):com.intellij.openapi.fileEditor.FileEditor[]
 - a:showDiffFile(com.intellij.openapi.vfs.VirtualFile,Z,Z):com.intellij.openapi.fileEditor.FileEditor[]
 f:com.intellij.diff.editor.DiffEditorTabFilesManager$Companion
-- sf:SHOW_DIFF_IN_EDITOR_SETTING:java.lang.String
 - f:getInstance(com.intellij.openapi.project.Project):com.intellij.diff.editor.DiffEditorTabFilesManager
-- f:isDiffInEditor():Z
-- f:isDiffInWindow():Z
-- f:setDiffInEditor(Z):V
 c:com.intellij.diff.editor.DiffEditorViewerFileEditor
 - com.intellij.diff.util.FileEditorBase
 - com.intellij.openapi.fileEditor.FileEditorWithTextEditors

platform/diff-impl/src/com/intellij/diff/actions/ShowStandaloneDiffAction.kt

@@ -1,7 +1,7 @@
 // Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.diff.actions
 
-import com.intellij.diff.editor.DiffEditorTabFilesManager.Companion.isDiffInEditor
+import com.intellij.diff.editor.DiffEditorTabFilesUtil
 import com.intellij.diff.tools.external.ExternalDiffTool
 import com.intellij.idea.ActionsBundle.message
 import com.intellij.openapi.actionSystem.AnActionEvent
@@ -28,7 +28,7 @@ internal class ShowStandaloneDiffAction : ExtendableAction(EP_NAME), DumbAware {
     val project = e.project
 
     with(e.presentation) {
-      if (isDiffInEditor) {
+      if (DiffEditorTabFilesUtil.isDiffInEditor) {
         text = message("action.Diff.ShowStandaloneDiff.tab.text")
         description = message("action.Diff.ShowStandaloneDiff.tab.description")
       }

platform/diff-impl/src/com/intellij/diff/editor/DiffEditorTabFilesManager.kt

@@ -3,7 +3,6 @@ package com.intellij.diff.editor
 
 import com.intellij.openapi.components.service
 import com.intellij.openapi.fileEditor.FileEditor
-import com.intellij.openapi.options.advanced.AdvancedSettings
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.VirtualFile
 
@@ -11,7 +10,7 @@ interface DiffEditorTabFilesManager {
 
   fun showDiffFile(diffFile: VirtualFile, focusEditor: Boolean): Array<out FileEditor> {
     DiffEditorTabFilesUtil.setForceOpeningsInNewWindow(diffFile, null)
-    return showDiffFile(diffFile, focusEditor, isDiffInEditor)
+    return showDiffFile(diffFile, focusEditor, DiffEditorTabFilesUtil.isDiffInEditor)
   }
 
   fun showDiffFile(diffFile: VirtualFile, focusEditor: Boolean, openInEditor: Boolean): Array<out FileEditor>
@@ -23,23 +22,6 @@ interface DiffEditorTabFilesManager {
   fun isDiffOpenedInWindow(file: VirtualFile): Boolean
 
   companion object {
-    const val SHOW_DIFF_IN_EDITOR_SETTING = "show.diff.as.editor.tab"
-
-    /**
-     * If enabled - the [DiffViewerVirtualFile] will open like a normal editor in current split.
-     * If disabled - it will use [com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.OpenMode.NEW_WINDOW].
-     */
-    @JvmStatic
-    var isDiffInEditor: Boolean
-      get() = AdvancedSettings.getBoolean(SHOW_DIFF_IN_EDITOR_SETTING)
-      set(value) {
-        if (AdvancedSettings.getBoolean(SHOW_DIFF_IN_EDITOR_SETTING) != value) {
-          AdvancedSettings.setBoolean(SHOW_DIFF_IN_EDITOR_SETTING, value)
-        }
-      }
-
-    @JvmStatic
-    val isDiffInWindow: Boolean get() = !isDiffInEditor
 
     @JvmStatic
     fun getInstance(project: Project): DiffEditorTabFilesManager = project.service()

platform/diff-impl/src/com/intellij/diff/editor/DiffEditorTabFilesManagerImpl.kt

@@ -66,7 +66,7 @@ internal abstract class MoveDiffEditorAction(private val openInNewWindow: Boolea
   }
 
   override fun actionPerformed(e: AnActionEvent) {
-    DiffEditorTabFilesManager.isDiffInEditor = !openInNewWindow
+    DiffEditorTabFilesUtil.isDiffInEditor = !openInNewWindow
   }
 
   internal class ToEditor : MoveDiffEditorAction(false)
@@ -75,7 +75,7 @@ internal abstract class MoveDiffEditorAction(private val openInNewWindow: Boolea
 
 internal class EditorTabDiffPreviewAdvancedSettingsListener : AdvancedSettingsChangeListener {
   override fun advancedSettingChanged(id: String, oldValue: Any, newValue: Any) {
-    if (id == DiffEditorTabFilesManager.SHOW_DIFF_IN_EDITOR_SETTING) {
+    if (id == DiffEditorTabFilesUtil.SHOW_DIFF_IN_EDITOR_SETTING) {
       for (project in ProjectManager.getInstance().openProjects) {
         reopenDiffEditorsForFiles(project)
       }
@@ -87,7 +87,7 @@ internal class EditorTabDiffPreviewAdvancedSettingsListener : AdvancedSettingsCh
      * Unlike [com.intellij.diff.editor.DiffEditorViewerFileEditor.reloadDiffEditorsForFiles], should not try to reopen tabs in-place.
      */
     private fun reopenDiffEditorsForFiles(project: Project) {
-      val isOpenInNewWindow = DiffEditorTabFilesManager.isDiffInWindow
+      val isOpenInNewWindow = DiffEditorTabFilesUtil.isDiffInWindow
 
       val editorManager = FileEditorManager.getInstance(project) as? FileEditorManagerImpl ?: return
       val diffEditorManager = DiffEditorTabFilesManager.getInstance(project)
@@ -136,9 +136,9 @@ internal class DiffInWindowDndListener : FileOpenedSyncListener {
     } ?: return
 
     val isFileInEditor = !isSingletonEditorInWindow(window)
-    if (DiffEditorTabFilesManager.isDiffInEditor != isFileInEditor) {
+    if (DiffEditorTabFilesUtil.isDiffInEditor != isFileInEditor) {
       invokeLater(ModalityState.nonModal()) {
-        DiffEditorTabFilesManager.isDiffInEditor = isFileInEditor
+        DiffEditorTabFilesUtil.isDiffInEditor = isFileInEditor
       }
     }
   }

platform/diff-impl/src/com/intellij/diff/editor/DiffEditorTabFilesUtil.kt

@@ -1,6 +1,7 @@
 // Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.diff.editor
 
+import com.intellij.openapi.options.advanced.AdvancedSettings
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.Key
 import com.intellij.openapi.vfs.VirtualFile
@@ -8,6 +9,24 @@ import org.jetbrains.annotations.ApiStatus
 
 @ApiStatus.Internal
 object DiffEditorTabFilesUtil {
+  @JvmStatic
+  val isDiffInWindow: Boolean get() = !isDiffInEditor
+
+  const val SHOW_DIFF_IN_EDITOR_SETTING: String = "show.diff.as.editor.tab"
+
+  /**
+   * If enabled - the [DiffViewerVirtualFile] will open like a normal editor in current split.
+   * If disabled - it will use [com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl.OpenMode.NEW_WINDOW].
+   */
+  @JvmStatic
+  var isDiffInEditor: Boolean
+    get() = AdvancedSettings.getBoolean(SHOW_DIFF_IN_EDITOR_SETTING)
+    set(value) {
+      if (AdvancedSettings.getBoolean(SHOW_DIFF_IN_EDITOR_SETTING) != value) {
+        AdvancedSettings.setBoolean(SHOW_DIFF_IN_EDITOR_SETTING, value)
+      }
+    }
+
   private val FORCE_OPENING_IN_NEW_WINDOW: Key<Boolean> = Key.create("Diff.ForceOpeningInNewWindow")
 
   internal fun setForceOpeningsInNewWindow(file: VirtualFile, value: Boolean?) {

platform/diff-impl/src/com/intellij/diff/impl/DiffRequestProcessorEditorState.kt

@@ -1,7 +1,7 @@
 // Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.diff.impl
 
-import com.intellij.diff.editor.DiffEditorTabFilesManager.Companion.isDiffInEditor
+import com.intellij.diff.editor.DiffEditorTabFilesUtil
 import com.intellij.openapi.fileEditor.FileEditorState
 import com.intellij.openapi.fileEditor.FileEditorStateLevel
 import com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl
@@ -12,7 +12,7 @@ internal data class DiffRequestProcessorEditorState(
   @JvmField val embeddedEditorStates: List<TextEditorState>
 ) : FileEditorStateWithPreferredOpenMode {
   override val openMode: FileEditorManagerImpl.OpenMode?
-    get() = if (!isDiffInEditor) FileEditorManagerImpl.OpenMode.NEW_WINDOW else null
+    get() = if (!DiffEditorTabFilesUtil.isDiffInEditor) FileEditorManagerImpl.OpenMode.NEW_WINDOW else null
 
   override fun canBeMergedWith(otherState: FileEditorState, level: FileEditorStateLevel): Boolean {
     return otherState is DiffRequestProcessorEditorState &&

platform/diff-impl/src/com/intellij/diff/tools/combined/CombinedDiffComponentProcessorImpl.kt

@@ -2,7 +2,7 @@
 package com.intellij.diff.tools.combined
 
 import com.intellij.diff.*
-import com.intellij.diff.editor.DiffEditorTabFilesManager.Companion.isDiffInEditor
+import com.intellij.diff.editor.DiffEditorTabFilesUtil
 import com.intellij.diff.impl.DiffEditorViewer
 import com.intellij.diff.impl.DiffEditorViewerListener
 import com.intellij.diff.impl.DiffRequestProcessor
@@ -261,7 +261,7 @@ internal data class CombinedDiffEditorState(
   val activeEditorStates: List<TextEditorState>,
 ) : FileEditorStateWithPreferredOpenMode {
   override val openMode: FileEditorManagerImpl.OpenMode?
-    get() = if (!isDiffInEditor) FileEditorManagerImpl.OpenMode.NEW_WINDOW else null
+    get() = if (!DiffEditorTabFilesUtil.isDiffInEditor) FileEditorManagerImpl.OpenMode.NEW_WINDOW else null
 
   override fun canBeMergedWith(otherState: FileEditorState, level: FileEditorStateLevel): Boolean {
     return otherState is CombinedDiffEditorState &&

platform/lvcs-impl/src/com/intellij/platform/lvcs/impl/ui/ActivityView.kt

@@ -1,7 +1,7 @@
 // Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.platform.lvcs.impl.ui
 
-import com.intellij.diff.editor.DiffEditorTabFilesManager
+import com.intellij.diff.editor.DiffEditorTabFilesUtil
 import com.intellij.diff.impl.DiffEditorViewer
 import com.intellij.diff.impl.DiffRequestProcessor
 import com.intellij.diff.impl.DiffRequestProcessorListener
@@ -323,7 +323,7 @@ class ActivityView(private val project: Project, gateway: IdeaGateway, val activ
       }
 
       val activityView = ActivityView(project, gateway, activityScope)
-      if (Registry.`is`("lvcs.open.diff.automatically") && DiffEditorTabFilesManager.isDiffInEditor) {
+      if (Registry.`is`("lvcs.open.diff.automatically") && DiffEditorTabFilesUtil.isDiffInEditor) {
         activityView.openDiffWhenLoaded()
       }
 

platform/vcs-impl/frontend/src/com/intellij/platform/vcs/impl/frontend/diff/DiffRecentFilesNavigator.kt

@@ -1,7 +1,7 @@
 // Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package com.intellij.platform.vcs.impl.frontend.diff
 
-import com.intellij.diff.editor.DiffEditorTabFilesManager
+import com.intellij.diff.editor.DiffEditorTabFilesUtil
 import com.intellij.openapi.fileEditor.impl.FileEditorManagerImpl
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.VirtualFile
@@ -10,7 +10,7 @@ import com.intellij.platform.recentFiles.frontend.RecentFilesNavigator
 internal class DiffRecentFilesNavigator : RecentFilesNavigator {
   override fun getEditorOpenOptions(project: Project, file: VirtualFile): FileEditorManagerImpl.OpenMode? {
     // TODO - "Open Diff as Editor Tab" advanced setting is duplicated on client and host
-    return if (file.isDiffVirtualFile() && DiffEditorTabFilesManager.isDiffInWindow)
+    return if (file.isDiffVirtualFile() && DiffEditorTabFilesUtil.isDiffInWindow)
       FileEditorManagerImpl.OpenMode.NEW_WINDOW
     else null
   }

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/ShowDiffInEditorTooltipInstaller.kt

@@ -4,7 +4,7 @@ package com.intellij.openapi.vcs.changes
 import com.intellij.diff.DiffContext
 import com.intellij.diff.actions.impl.SetEditorSettingsAction
 import com.intellij.diff.actions.impl.SetEditorSettingsActionGroup
-import com.intellij.diff.editor.DiffEditorTabFilesManager
+import com.intellij.diff.editor.DiffEditorTabFilesUtil
 import com.intellij.diff.editor.DiffRequestProcessorEditorCustomizer
 import com.intellij.diff.util.DiffUserDataKeysEx
 import com.intellij.openapi.Disposable
@@ -48,7 +48,7 @@ private class ShowDiffInEditorTabTooltipHolder(
   }
 
   override fun advancedSettingChanged(id: String, oldValue: Any, newValue: Any) {
-    if (id == DiffEditorTabFilesManager.SHOW_DIFF_IN_EDITOR_SETTING && !DiffEditorTabFilesManager.isDiffInEditor) {
+    if (id == DiffEditorTabFilesUtil.SHOW_DIFF_IN_EDITOR_SETTING && !DiffEditorTabFilesUtil.isDiffInEditor) {
       showGotItTooltip()
     }
   }

plugins/git-features-trainer/src/training/git/lesson/GitAnnotateLesson.kt

@@ -1,7 +1,7 @@
 // Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package training.git.lesson
 
-import com.intellij.diff.editor.DiffEditorTabFilesManager
+import com.intellij.diff.editor.DiffEditorTabFilesUtil
 import com.intellij.diff.impl.DiffWindowBase
 import com.intellij.diff.tools.util.DiffSplitter
 import com.intellij.ide.IdeBundle
@@ -248,7 +248,7 @@ class GitAnnotateLesson : GitLesson("Git.Annotate", GitLessonsBundle.message("gi
 
     task("EditorEscape") {
       text(GitLessonsBundle.message("git.annotate.close.all.windows",
-                                    if (DiffEditorTabFilesManager.isDiffInWindow) 0 else 1, action(it)))
+                                    if (DiffEditorTabFilesUtil.isDiffInWindow) 0 else 1, action(it)))
       stateCheck {
         firstDiffSplitter?.isShowing != true && secondDiffSplitter?.isShowing != true
       }

plugins/git-features-trainer/src/training/git/lesson/GitProjectHistoryLesson.kt

@@ -1,7 +1,7 @@
 // Copyright 2000-2025 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
 package training.git.lesson
 
-import com.intellij.diff.editor.DiffEditorTabFilesManager
+import com.intellij.diff.editor.DiffEditorTabFilesUtil
 import com.intellij.diff.tools.util.SimpleDiffPanel
 import com.intellij.icons.AllIcons
 import com.intellij.openapi.project.Project
@@ -204,7 +204,7 @@ internal class GitProjectHistoryLesson : GitLesson("Git.ProjectHistory", GitLess
       }
     }
 
-    if (DiffEditorTabFilesManager.isDiffInWindow) {
+    if (DiffEditorTabFilesUtil.isDiffInWindow) {
       task("EditorEscape") {
         text(GitLessonsBundle.message("git.project.history.close.diff", action(it)))
         stateCheck { previous.ui?.isShowing != true }