/*  Title:      Tools/jEdit/src/isabelle.scala

    Author:     Makarius

Convenience operations for Isabelle/jEdit.

*/

package isabelle.jedit

import isabelle._

import org.gjt.sp.jedit.{jEdit, View, Buffer}

import org.gjt.sp.jedit.textarea.JEditTextArea

import org.gjt.sp.jedit.gui.DockableWindowManager

object Isabelle

{

  /* dockable windows */

  private def wm(view: View): DockableWindowManager = view.getDockableWindowManager

  def docked_theories(view: View): Option[Theories_Dockable] =

    wm(view).getDockableWindow("isabelle-theories") match {

      case dockable: Theories_Dockable => Some(dockable)

      case _ => None

    }

  def docked_output(view: View): Option[Output_Dockable] =

    wm(view).getDockableWindow("isabelle-output") match {

      case dockable: Output_Dockable => Some(dockable)

      case _ => None

    }

  def docked_raw_output(view: View): Option[Raw_Output_Dockable] =

    wm(view).getDockableWindow("isabelle-raw-output") match {

      case dockable: Raw_Output_Dockable => Some(dockable)

      case _ => None

    }

  def docked_protocol(view: View): Option[Protocol_Dockable] =

    wm(view).getDockableWindow("isabelle-protocol") match {

      case dockable: Protocol_Dockable => Some(dockable)

      case _ => None

    }

  /* font size */

  def change_font_size(view: View, change: Int => Int)

  {

    val size = change(jEdit.getIntegerProperty("view.fontsize", 16)) max 5

    jEdit.setIntegerProperty("view.fontsize", size)

    jEdit.propertiesChanged()

    jEdit.saveSettings()

    view.getStatus.setMessageAndClear("Text font size: " + size)

  }

  def increase_font_size(view: View): Unit = change_font_size(view, i => i + ((i / 10) max 1))

  def decrease_font_size(view: View): Unit = change_font_size(view, i => i - ((i / 10) max 1))

  /* structured insert */

  def insert_line_padding(text_area: JEditTextArea, text: String)

  {

    val buffer = text_area.getBuffer

    JEdit_Lib.buffer_edit(buffer) {

      val text1 =

        if (text_area.getSelectionCount == 0) {

          def pad(range: Text.Range): String =

            if (JEdit_Lib.try_get_text(buffer, range) == Some("\n")) "" else "\n"

          val caret = JEdit_Lib.point_range(buffer, text_area.getCaretPosition)

          val before_caret = JEdit_Lib.point_range(buffer, caret.start - 1)

          pad(before_caret) + text + pad(caret)

        }

        else text

      text_area.setSelectedText(text1)

    }

  }

  /* control styles */

  def control_sub(text_area: JEditTextArea)

  { Token_Markup.edit_control_style(text_area, Symbol.sub_decoded) }

  def control_sup(text_area: JEditTextArea)

  { Token_Markup.edit_control_style(text_area, Symbol.sup_decoded) }

  def control_isub(text_area: JEditTextArea)

  { Token_Markup.edit_control_style(text_area, Symbol.isub_decoded) }

  def control_isup(text_area: JEditTextArea)

  { Token_Markup.edit_control_style(text_area, Symbol.isup_decoded) }

  def control_bold(text_area: JEditTextArea)

  { Token_Markup.edit_control_style(text_area, Symbol.bold_decoded) }

  def control_reset(text_area: JEditTextArea)

  { Token_Markup.edit_control_style(text_area, "") }

  /* block styles */

  private def enclose_input(text_area: JEditTextArea, s1: String, s2: String)

  {

    s1.foreach(text_area.userInput(_))

    s2.foreach(text_area.userInput(_))

    s2.foreach(_ => text_area.goToPrevCharacter(false))

  }

  def input_bsub(text_area: JEditTextArea)

  { enclose_input(text_area, Symbol.bsub_decoded, Symbol.esub_decoded) }

  def input_bsup(text_area: JEditTextArea)

  { enclose_input(text_area, Symbol.bsup_decoded, Symbol.esup_decoded) }

}