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path: root/platform/diff-impl/src/com/intellij/diff/settings/ExternalToolsTablePanel.kt
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// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
package com.intellij.diff.settings

import com.intellij.diff.tools.external.ExternalDiffSettings
import com.intellij.diff.tools.external.ExternalDiffSettings.*
import com.intellij.openapi.diff.DiffBundle
import com.intellij.openapi.fileTypes.FileTypeManager
import com.intellij.openapi.ui.ComboBoxTableRenderer
import com.intellij.openapi.ui.MessageDialogBuilder
import com.intellij.openapi.util.NlsContexts
import com.intellij.ui.CheckedTreeNode
import com.intellij.ui.SimpleColoredComponent
import com.intellij.ui.SimpleTextAttributes
import com.intellij.ui.ToolbarDecorator
import com.intellij.ui.table.TableView
import com.intellij.util.ui.ColumnInfo
import com.intellij.util.ui.ListTableModel
import com.intellij.util.ui.components.BorderLayoutPanel
import java.awt.Component
import javax.swing.Icon
import javax.swing.JComponent
import javax.swing.JTable
import javax.swing.table.TableCellEditor
import javax.swing.table.TableCellRenderer
import javax.swing.tree.DefaultMutableTreeNode
import javax.swing.tree.DefaultTreeModel

internal class ExternalToolsTablePanel(private val models: ExternalToolsModels) : BorderLayoutPanel() {
  val component: JComponent

  private val model: ListTableModel<ExternalToolConfiguration> = models.tableModel
  private val table: TableView<ExternalToolConfiguration> = TableView(model).apply {
    visibleRowCount = 8
    rowSelectionAllowed = false
    tableHeader.reorderingAllowed = false

    setExpandableItemsEnabled(false)
  }

  init {
    val toolbarTable = ToolbarDecorator.createDecorator(table)
      .setAddAction { addData() }
      .setRemoveAction { removeData() }
      .disableUpDownActions()
      .createPanel()

    component = toolbarTable
  }

  fun onModified(settings: ExternalDiffSettings): Boolean {
    val persistedData = mutableListOf(settings.defaultToolConfiguration).apply {
      addAll(settings.externalToolsConfiguration)
    }

    return model.items != persistedData
  }

  fun onApply(settings: ExternalDiffSettings) {
    val persistedData = model.items
    settings.defaultToolConfiguration = persistedData[0]

    if (persistedData.size > 1) {
      settings.externalToolsConfiguration = persistedData.subList(1, persistedData.size)
    }
    else {
      settings.externalToolsConfiguration = mutableListOf()
    }
  }

  fun onReset(settings: ExternalDiffSettings) {
    repeat(model.items.size) { model.removeRow(0) }
    model.addRow(settings.defaultToolConfiguration.copy())
    model.addRows(settings.externalToolsConfiguration.map { it.copy() })
  }

  private fun addData() {
    val fileTypes = FileTypeManager.getInstance().registeredFileTypes.map { it.name }.toSet()
    val configuredFileTypes = models.tableModel.items.map { it.fileTypeName }.toSet()
    val availableFileTypes = fileTypes - configuredFileTypes

    model.addRow(ExternalToolConfiguration(availableFileTypes.first()))
  }

  private fun removeData() {
    if (model.getItem(table.selectedRow).fileTypeName == ExternalToolConfiguration.DEFAULT_TOOL_NAME) {
      return
    }

    val dialog = MessageDialogBuilder.okCancel(DiffBundle.message("settings.external.diff.table.remove.dialog.title"),
                                               DiffBundle.message("settings.external.diff.table.remove.dialog.message"))
    if (dialog.guessWindowAndAsk()) {
      model.removeRow(table.selectedRow)
    }
  }

  class FileTypeColumn(private val models: ExternalToolsModels) : ColumnInfo<ExternalToolConfiguration, String>(
    DiffBundle.message("settings.external.diff.table.filetype.column")
  ) {

    override fun valueOf(externalToolConfiguration: ExternalToolConfiguration): String {
      return externalToolConfiguration.fileTypeName
    }

    override fun setValue(item: ExternalToolConfiguration, value: String) {
      item.fileTypeName = value
    }

    override fun getEditor(item: ExternalToolConfiguration): TableCellEditor = createComboBoxRendererAndEditor()

    override fun getRenderer(item: ExternalToolConfiguration): TableCellRenderer = createComboBoxRendererAndEditor()

    override fun isCellEditable(item: ExternalToolConfiguration): Boolean = true

    private fun createComboBoxRendererAndEditor(): ComboBoxTableRenderer<String> {
      val fileTypes = FileTypeManager.getInstance().registeredFileTypes.map { it.name }.toSet()
      val configuredFileTypes = models.tableModel.items.map { it.fileTypeName }.toSet()
      val availableFileTypes = fileTypes - configuredFileTypes

      return FileTypeCellComboBox(availableFileTypes.toTypedArray()).withClickCount(1)
    }

    private class FileTypeCellComboBox(values: Array<String>) : ComboBoxTableRenderer<String>(values) {
      private val fileTypes = FileTypeManager.getInstance().registeredFileTypes.associateBy { type -> type.name }

      override fun getTextFor(value: String): String {
        // renderer for DEFAULT_TOOL_NAME is overridden
        return fileTypes[value]?.displayName
               ?: DiffBundle.message("settings.external.diff.comboBox.value.unknown.filetype.text", value)
      }

      override fun getTableCellRendererComponent(table: JTable, value: Any,
                                                 isSelected: Boolean, hasFocus: Boolean,
                                                 row: Int, column: Int): Component {
        if ((value as String) == ExternalToolConfiguration.DEFAULT_TOOL_NAME) {
          return SimpleColoredComponent().apply {
            append(value, SimpleTextAttributes.REGULAR_BOLD_ATTRIBUTES) // NON-NLS
          }
        }

        return super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column)
      }

      override fun getTableCellEditorComponent(table: JTable, value: Any, isSelected: Boolean, row: Int, column: Int): Component? {
        if ((value as String) == ExternalToolConfiguration.DEFAULT_TOOL_NAME) {
          return null
        }

        return super.getTableCellEditorComponent(table, value, isSelected, row, column)
      }

      override fun getIconFor(value: String): Icon? = fileTypes[value]?.icon
    }
  }

  class ExternalToolColumn(
    private val externalToolGroup: ExternalToolGroup,
    private val treeModel: DefaultTreeModel,
    @NlsContexts.ColumnName columnMessage: String
  ) : ColumnInfo<ExternalToolConfiguration, String>(columnMessage) {
    override fun valueOf(externalToolConfiguration: ExternalToolConfiguration): String = when (externalToolGroup) {
      ExternalToolGroup.DIFF_TOOL -> externalToolConfiguration.diffToolName
      ExternalToolGroup.MERGE_TOOL -> externalToolConfiguration.mergeToolName
    }

    override fun setValue(item: ExternalToolConfiguration, value: String) {
      when (externalToolGroup) {
        ExternalToolGroup.DIFF_TOOL -> item.diffToolName = value
        ExternalToolGroup.MERGE_TOOL -> item.mergeToolName = value
      }
    }

    override fun getRenderer(item: ExternalToolConfiguration): TableCellRenderer = createComboBoxRendererAndEditor()

    override fun getEditor(item: ExternalToolConfiguration): TableCellEditor = createComboBoxRendererAndEditor()

    override fun isCellEditable(item: ExternalToolConfiguration): Boolean = true

    private fun createComboBoxRendererAndEditor(): ComboBoxTableRenderer<String> {
      val values = treeModel.collectTools(externalToolGroup).toTypedArray()
      return ComboBoxTableRenderer(values).withClickCount(1)
    }

    private fun DefaultTreeModel.collectTools(externalToolGroup: ExternalToolGroup): List<String> {
      val tools = mutableListOf(ExternalToolConfiguration.BUILTIN_TOOL)
      for (child in (root as CheckedTreeNode).children()) {
        val treeNode = child as DefaultMutableTreeNode
        if (treeNode.userObject as ExternalToolGroup == externalToolGroup) {
          tools.addAll(treeNode.children().asSequence().map {
            val node = it as DefaultMutableTreeNode
            val tool = node.userObject as ExternalTool
            tool.name
          }.toList())
        }
      }

      return tools
    }
  }
}