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

   1 // Copyright 2000-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
   2 package com.intellij.diff.editor
   3
   4 import com.intellij.diff.impl.DiffRequestProcessor
   5 import com.intellij.diff.util.DiffUserDataKeysEx
   6 import com.intellij.diff.util.DiffUtil
   7 import com.intellij.diff.util.FileEditorBase
   8 import com.intellij.openapi.Disposable
   9 import com.intellij.openapi.actionSystem.CommonShortcuts
  10 import com.intellij.openapi.diagnostic.logger
  11 import com.intellij.openapi.diff.DiffBundle
  12 import com.intellij.openapi.fileEditor.FileEditor
  13 import com.intellij.openapi.fileEditor.impl.EditorWindow
  14 import com.intellij.openapi.util.Disposer
  15 import com.intellij.openapi.vfs.VirtualFile
  16 import java.awt.BorderLayout
  17 import java.awt.event.ContainerAdapter
  18 import java.awt.event.ContainerEvent
  19 import java.awt.event.KeyEvent
  20 import javax.swing.JComponent
  21 import javax.swing.JComponent.WHEN_IN_FOCUSED_WINDOW
  22 import javax.swing.JPanel
  23 import javax.swing.KeyStroke
  24
  25 open class DiffRequestProcessorEditor(
  26   private val file: DiffVirtualFile,
  27   val processor: DiffRequestProcessor
  28 ) : FileEditorBase() {
  29   companion object {
  30     private val LOG = logger<DiffRequestProcessorEditor>()
  31   }
  32
  33   private var disposed = false
  34
  35   private val panel = MyPanel(processor.component)
  36
  37   init {
  38     putUserData(EditorWindow.HIDE_TABS, true)
  39     if (!DiffUtil.isUserDataFlagSet(DiffUserDataKeysEx.DIFF_IN_EDITOR_WITH_EXPLICIT_DISPOSABLE, processor.context)) {
  40       Disposer.register(this, Disposable {
  41         Disposer.dispose(processor)
  42       })
  43     }
  44     Disposer.register(processor, Disposable {
  45       propertyChangeSupport.firePropertyChange(FileEditor.PROP_VALID, true, false)
  46     })
  47
  48     processor.component.registerKeyboardAction({ Disposer.dispose(this) },
  49                                                KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0), WHEN_IN_FOCUSED_WINDOW)
  50
  51     file.getUserData(DiffVirtualFile.ESCAPE_HANDLER)?.registerCustomShortcutSet(CommonShortcuts.ESCAPE, component, this)
  52   }
  53
  54   override fun getComponent(): JComponent = panel
  55   override fun getPreferredFocusedComponent(): JComponent? = processor.preferredFocusedComponent
  56
  57   override fun dispose() {
  58     disposed = true
  59   }
  60   override fun isValid(): Boolean = !disposed && !processor.isDisposed
  61   override fun getFile(): VirtualFile = file
  62   override fun getName(): String = DiffBundle.message("diff.file.editor.name")
  63
  64   override fun selectNotify() {
  65     processor.updateRequest()
  66   }
  67
  68   private inner class MyPanel(component: JComponent) : JPanel(BorderLayout()) {
  69     init {
  70       add(component, BorderLayout.CENTER)
  71
  72       addContainerListener(object : ContainerAdapter() {
  73         override fun componentRemoved(e: ContainerEvent?) {
  74           if (disposed) return
  75           LOG.error("DiffRequestProcessor cannot be shown twice, see com.intellij.ide.actions.SplitAction.FORBID_TAB_SPLIT, file: $file")
  76         }
  77       })
  78     }
  79   }
  80 }