author | wenzelm |
Tue, 30 Aug 2011 16:04:26 +0200 | |
changeset 44582 | 479c07072992 |
parent 44581 | 7daef43592d0 |
child 44607 | 274eff0ea12e |
permissions | -rw-r--r-- |
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/* Title: Pure/PIDE/document.scala |
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Author: Makarius |
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Document as collection of named nodes, each consisting of an editable |
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list of commands, associated with asynchronous execution process. |
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*/ |
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package isabelle |
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import scala.collection.mutable |
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object Document |
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{ |
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/* formal identifiers */ |
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type ID = Long |
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val ID = Properties.Value.Long |
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type Version_ID = ID |
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type Command_ID = ID |
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type Exec_ID = ID |
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val no_id: ID = 0 |
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val new_id = new Counter |
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/** document structure **/ |
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/* named nodes -- development graph */ |
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type Edit[A, B] = (String, Node.Edit[A, B]) |
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type Edit_Text = Edit[Text.Edit, Text.Perspective] |
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type Edit_Command = Edit[(Option[Command], Option[Command]), Command.Perspective] |
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type Node_Header = Exn.Result[Thy_Header] |
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object Node |
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{ |
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sealed abstract class Edit[A, B] |
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{ |
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def foreach(f: A => Unit) |
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{ |
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this match { |
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case Edits(es) => es.foreach(f) |
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case _ => |
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} |
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} |
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} |
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case class Clear[A, B]() extends Edit[A, B] |
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case class Edits[A, B](edits: List[A]) extends Edit[A, B] |
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case class Header[A, B](header: Node_Header) extends Edit[A, B] |
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case class Perspective[A, B](perspective: B) extends Edit[A, B] |
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def norm_header(f: String => String, g: String => String, header: Node_Header): Node_Header = |
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header match { |
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case Exn.Res(h) => Exn.capture { h.norm_deps(f, g) } |
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case exn => exn |
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} |
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val empty: Node = |
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Node(Exn.Exn(ERROR("Bad theory header")), Command.Perspective.empty, Map(), Linear_Set()) |
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def command_starts(commands: Iterator[Command], offset: Text.Offset = 0) |
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: Iterator[(Command, Text.Offset)] = |
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{ |
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var i = offset |
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for (command <- commands) yield { |
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val start = i |
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i += command.length |
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(command, start) |
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} |
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} |
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} |
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private val block_size = 1024 |
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sealed case class Node( |
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val header: Node_Header, |
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val perspective: Command.Perspective, |
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val blobs: Map[String, Blob], |
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val commands: Linear_Set[Command]) |
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{ |
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def clear: Node = Node.empty.copy(header = header) |
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/* commands */ |
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private lazy val full_index: (Array[(Command, Text.Offset)], Text.Range) = |
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{ |
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val blocks = new mutable.ListBuffer[(Command, Text.Offset)] |
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var next_block = 0 |
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var last_stop = 0 |
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for ((command, start) <- Node.command_starts(commands.iterator)) { |
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last_stop = start + command.length |
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while (last_stop + 1 > next_block) { |
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blocks += (command -> start) |
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next_block += block_size |
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} |
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} |
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(blocks.toArray, Text.Range(0, last_stop)) |
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} |
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def full_range: Text.Range = full_index._2 |
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def command_range(i: Text.Offset = 0): Iterator[(Command, Text.Offset)] = |
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{ |
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if (!commands.isEmpty && full_range.contains(i)) { |
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val (cmd0, start0) = full_index._1(i / block_size) |
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Node.command_starts(commands.iterator(cmd0), start0) dropWhile { |
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case (cmd, start) => start + cmd.length <= i } |
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} |
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else Iterator.empty |
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} |
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def command_range(range: Text.Range): Iterator[(Command, Text.Offset)] = |
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command_range(range.start) takeWhile { case (_, start) => start < range.stop } |
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def command_at(i: Text.Offset): Option[(Command, Text.Offset)] = |
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{ |
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val range = command_range(i) |
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if (range.hasNext) Some(range.next) else None |
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} |
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def proper_command_at(i: Text.Offset): Option[Command] = |
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command_at(i) match { |
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case Some((command, _)) => |
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commands.reverse_iterator(command).find(cmd => !cmd.is_ignored) |
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case None => None |
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} |
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def command_start(cmd: Command): Option[Text.Offset] = |
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command_starts.find(_._1 == cmd).map(_._2) |
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def command_starts: Iterator[(Command, Text.Offset)] = |
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Node.command_starts(commands.iterator) |
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} |
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/** versioning **/ |
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/* particular document versions */ |
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object Version |
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{ |
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val init: Version = Version(no_id, Map().withDefaultValue(Node.empty)) |
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} |
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type Nodes = Map[String, Node] |
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sealed case class Version(val id: Version_ID, val nodes: Nodes) |
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/* changes of plain text, eventually resulting in document edits */ |
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object Change |
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{ |
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val init: Change = Change(Future.value(Version.init), Nil, Future.value(Version.init)) |
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} |
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sealed case class Change( |
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val previous: Future[Version], |
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val edits: List[Edit_Text], |
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val version: Future[Version]) |
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{ |
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def is_finished: Boolean = previous.is_finished && version.is_finished |
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} |
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/* history navigation */ |
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object History |
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{ |
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val init: History = new History(List(Change.init)) |
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} |
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// FIXME pruning, purging of state |
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class History(val undo_list: List[Change]) |
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{ |
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require(!undo_list.isEmpty) |
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def tip: Change = undo_list.head |
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def +(change: Change): History = new History(change :: undo_list) |
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} |
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/** global state -- document structure, execution process, editing history **/ |
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|
192 |
abstract class Snapshot |
|
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{ |
|
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val state: State |
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val version: Version |
196 |
val node: Node |
|
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val is_outdated: Boolean |
|
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def command_state(command: Command): Command.State |
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def convert(i: Text.Offset): Text.Offset |
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def convert(range: Text.Range): Text.Range |
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def revert(i: Text.Offset): Text.Offset |
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def revert(range: Text.Range): Text.Range |
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def select_markup[A](range: Text.Range)(result: Markup_Tree.Select[A]) |
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: Stream[Text.Info[Option[A]]] |
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} |
206 |
||
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type Assign = |
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(List[(Document.Command_ID, Option[Document.Exec_ID])], // exec state assignment |
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List[(String, Option[Document.Command_ID])]) // last exec |
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210 |
|
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val no_assign: Assign = (Nil, Nil) |
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212 |
|
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object State |
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{ |
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class Fail(state: State) extends Exception |
216 |
||
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val init: State = |
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State().define_version(Version.init, Assignment.init).assign(Version.init.id, no_assign)._2 |
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219 |
|
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object Assignment |
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{ |
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val init: Assignment = Assignment(Map.empty, Map.empty, false) |
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} |
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224 |
|
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case class Assignment( |
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val command_execs: Map[Command_ID, Exec_ID], |
227 |
val last_execs: Map[String, Option[Command_ID]], |
|
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val is_finished: Boolean) |
|
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{ |
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def check_finished: Assignment = { require(is_finished); this } |
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def unfinished: Assignment = copy(is_finished = false) |
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232 |
|
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def assign(add_command_execs: List[(Command_ID, Option[Exec_ID])], |
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add_last_execs: List[(String, Option[Command_ID])]): Assignment = |
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235 |
{ |
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require(!is_finished) |
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val command_execs1 = |
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(command_execs /: add_command_execs) { |
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case (res, (command_id, None)) => res - command_id |
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case (res, (command_id, Some(exec_id))) => res + (command_id -> exec_id) |
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} |
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Assignment(command_execs1, last_execs ++ add_last_execs, true) |
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243 |
} |
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} |
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245 |
} |
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246 |
|
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sealed case class State( |
38417 | 248 |
val versions: Map[Version_ID, Version] = Map(), |
44446 | 249 |
val commands: Map[Command_ID, Command.State] = Map(), // static markup from define_command |
250 |
val execs: Map[Exec_ID, Command.State] = Map(), // dynamic markup from execution |
|
43722 | 251 |
val assignments: Map[Version_ID, State.Assignment] = Map(), |
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val disposed: Set[ID] = Set(), // FIXME unused!? |
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253 |
val history: History = History.init) |
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254 |
{ |
38373 | 255 |
private def fail[A]: A = throw new State.Fail(this) |
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256 |
|
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def define_version(version: Version, assignment: State.Assignment): State = |
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{ |
38417 | 259 |
val id = version.id |
260 |
if (versions.isDefinedAt(id) || disposed(id)) fail |
|
261 |
copy(versions = versions + (id -> version), |
|
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assignments = assignments + (id -> assignment.unfinished)) |
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263 |
} |
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|
264 |
|
38373 | 265 |
def define_command(command: Command): State = |
266 |
{ |
|
267 |
val id = command.id |
|
268 |
if (commands.isDefinedAt(id) || disposed(id)) fail |
|
269 |
copy(commands = commands + (id -> command.empty_state)) |
|
270 |
} |
|
271 |
||
44582 | 272 |
def defined_command(id: Command_ID): Boolean = commands.isDefinedAt(id) |
273 |
||
274 |
def find_command(version: Version, id: ID): Option[(String, Node, Command)] = |
|
275 |
commands.get(id) orElse execs.get(id) match { |
|
276 |
case None => None |
|
277 |
case Some(st) => |
|
278 |
val command = st.command |
|
279 |
version.nodes.find({ case (_, node) => node.commands(command) }) |
|
280 |
.map({ case (name, node) => (name, node, command) }) |
|
281 |
} |
|
38373 | 282 |
|
38417 | 283 |
def the_version(id: Version_ID): Version = versions.getOrElse(id, fail) |
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284 |
def the_command(id: Command_ID): Command.State = commands.getOrElse(id, fail) // FIXME rename |
44446 | 285 |
def the_exec(id: Exec_ID): Command.State = execs.getOrElse(id, fail) |
43722 | 286 |
def the_assignment(version: Version): State.Assignment = |
287 |
assignments.getOrElse(version.id, fail) |
|
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|
288 |
|
38872 | 289 |
def accumulate(id: ID, message: XML.Elem): (Command.State, State) = |
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290 |
execs.get(id) match { |
44446 | 291 |
case Some(st) => |
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|
292 |
val new_st = st.accumulate(message) |
44446 | 293 |
(new_st, copy(execs = execs + (id -> new_st))) |
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|
294 |
case None => |
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295 |
commands.get(id) match { |
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296 |
case Some(st) => |
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297 |
val new_st = st.accumulate(message) |
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(new_st, copy(commands = commands + (id -> new_st))) |
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299 |
case None => fail |
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|
300 |
} |
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|
301 |
} |
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|
302 |
|
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303 |
def assign(id: Version_ID, arg: Assign): (List[Command], State) = |
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|
304 |
{ |
38417 | 305 |
val version = the_version(id) |
44477 | 306 |
val (command_execs, last_execs) = arg |
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|
307 |
|
44543 | 308 |
val (changed_commands, new_execs) = |
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|
309 |
((Nil: List[Command], execs) /: command_execs) { |
44543 | 310 |
case ((commands1, execs1), (cmd_id, exec)) => |
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|
311 |
val st = the_command(cmd_id) |
44543 | 312 |
val commands2 = st.command :: commands1 |
313 |
val execs2 = |
|
314 |
exec match { |
|
315 |
case None => execs1 |
|
316 |
case Some(exec_id) => execs1 + (exec_id -> st) |
|
317 |
} |
|
318 |
(commands2, execs2) |
|
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|
319 |
} |
44477 | 320 |
val new_assignment = the_assignment(version).assign(command_execs, last_execs) |
43722 | 321 |
val new_state = copy(assignments = assignments + (id -> new_assignment), execs = new_execs) |
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322 |
|
44543 | 323 |
(changed_commands, new_state) |
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|
324 |
} |
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|
325 |
|
38417 | 326 |
def is_assigned(version: Version): Boolean = |
43722 | 327 |
assignments.get(version.id) match { |
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328 |
case Some(assgn) => assgn.is_finished |
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329 |
case None => false |
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330 |
} |
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|
331 |
|
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|
332 |
def is_stable(change: Change): Boolean = |
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333 |
change.is_finished && is_assigned(change.version.get_finished) |
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|
334 |
|
44475 | 335 |
def recent_stable: Option[Change] = history.undo_list.find(is_stable) |
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336 |
def tip_stable: Boolean = is_stable(history.tip) |
44475 | 337 |
def tip_version: Version = history.tip.version.get_finished |
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|
338 |
|
44484
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|
339 |
def last_exec_offset(name: String): Text.Offset = |
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|
340 |
{ |
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|
341 |
val version = tip_version |
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|
342 |
the_assignment(version).last_execs.get(name) match { |
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|
343 |
case Some(Some(id)) => |
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|
344 |
val node = version.nodes(name) |
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|
345 |
val cmd = the_command(id).command |
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|
346 |
node.command_start(cmd) match { |
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|
347 |
case None => 0 |
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|
348 |
case Some(start) => start + cmd.length |
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|
349 |
} |
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|
350 |
case _ => 0 |
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|
351 |
} |
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|
352 |
} |
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|
353 |
|
44446 | 354 |
def continue_history( |
355 |
previous: Future[Version], |
|
40479 | 356 |
edits: List[Edit_Text], |
43722 | 357 |
version: Future[Version]): (Change, State) = |
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|
358 |
{ |
43722 | 359 |
val change = Change(previous, edits, version) |
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|
360 |
(change, copy(history = history + change)) |
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|
361 |
} |
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include Document.History in Document.State -- just one universal session state maintained by main actor;
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|
362 |
|
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include Document.History in Document.State -- just one universal session state maintained by main actor;
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changeset
|
363 |
|
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|
364 |
// persistent user-view |
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|
365 |
def snapshot(name: String, pending_edits: List[Text.Edit]): Snapshot = |
38370
8b15d0f98962
explicit Document.State value, instead of individual state variables in Session, Command, Document;
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|
366 |
{ |
44436
546adfa8a6fc
update_perspective without actual edits, bypassing the full state assignment protocol;
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|
367 |
val stable = recent_stable.get |
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diff
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|
368 |
val latest = history.tip |
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|
369 |
|
44156 | 370 |
// FIXME proper treatment of removed nodes |
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|
371 |
val edits = |
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|
372 |
(pending_edits /: history.undo_list.takeWhile(_ != stable))((edits, change) => |
44156 | 373 |
(for ((a, Node.Edits(es)) <- change.edits if a == name) yield es).flatten ::: edits) |
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|
374 |
lazy val reverse_edits = edits.reverse |
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changeset
|
375 |
|
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diff
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|
376 |
new Snapshot |
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|
377 |
{ |
44582 | 378 |
val state = State.this |
39698 | 379 |
val version = stable.version.get_finished |
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|
380 |
val node = version.nodes(name) |
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|
381 |
val is_outdated = !(pending_edits.isEmpty && latest == stable) |
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|
382 |
|
44582 | 383 |
def command_state(command: Command): Command.State = |
44477 | 384 |
try { |
385 |
the_exec(the_assignment(version).check_finished.command_execs |
|
386 |
.getOrElse(command.id, fail)) |
|
387 |
} |
|
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|
388 |
catch { case _: State.Fail => command.empty_state } |
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changeset
|
389 |
|
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|
390 |
def convert(offset: Text.Offset) = (offset /: edits)((i, edit) => edit.convert(i)) |
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|
391 |
def revert(offset: Text.Offset) = (offset /: reverse_edits)((i, edit) => edit.revert(i)) |
43425 | 392 |
def convert(range: Text.Range) = (range /: edits)((r, edit) => edit.convert(r)) |
393 |
def revert(range: Text.Range) = (range /: reverse_edits)((r, edit) => edit.revert(r)) |
|
39177
0468964aec11
simplified Markup_Tree.select: Stream instead of Iterator (again), explicit Option instead of default;
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diff
changeset
|
394 |
|
39178
83e9f3ccea9f
concentrate Isabelle specific physical rendering markup selection in isabelle_markup.scala;
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diff
changeset
|
395 |
def select_markup[A](range: Text.Range)(result: Markup_Tree.Select[A]) |
39177
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simplified Markup_Tree.select: Stream instead of Iterator (again), explicit Option instead of default;
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diff
changeset
|
396 |
: Stream[Text.Info[Option[A]]] = |
38845
a9e37daf5bd0
added Document.Snapshot.select_markup, which includes command iteration, range conversion etc.;
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diff
changeset
|
397 |
{ |
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added Document.Snapshot.select_markup, which includes command iteration, range conversion etc.;
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diff
changeset
|
398 |
val former_range = revert(range) |
a9e37daf5bd0
added Document.Snapshot.select_markup, which includes command iteration, range conversion etc.;
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parents:
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diff
changeset
|
399 |
for { |
39177
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simplified Markup_Tree.select: Stream instead of Iterator (again), explicit Option instead of default;
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parents:
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diff
changeset
|
400 |
(command, command_start) <- node.command_range(former_range).toStream |
44582 | 401 |
Text.Info(r0, x) <- command_state(command).markup. |
38845
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parents:
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diff
changeset
|
402 |
select((former_range - command_start).restrict(command.range)) { |
a9e37daf5bd0
added Document.Snapshot.select_markup, which includes command iteration, range conversion etc.;
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diff
changeset
|
403 |
case Text.Info(r0, info) |
a9e37daf5bd0
added Document.Snapshot.select_markup, which includes command iteration, range conversion etc.;
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parents:
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diff
changeset
|
404 |
if result.isDefinedAt(Text.Info(convert(r0 + command_start), info)) => |
a9e37daf5bd0
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parents:
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diff
changeset
|
405 |
result(Text.Info(convert(r0 + command_start), info)) |
39177
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simplified Markup_Tree.select: Stream instead of Iterator (again), explicit Option instead of default;
wenzelm
parents:
38976
diff
changeset
|
406 |
} |
43427
5c716a68931a
select_markup: no filtering here -- results may be distorted anyway;
wenzelm
parents:
43425
diff
changeset
|
407 |
} yield Text.Info(convert(r0 + command_start), x) |
38845
a9e37daf5bd0
added Document.Snapshot.select_markup, which includes command iteration, range conversion etc.;
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parents:
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diff
changeset
|
408 |
} |
38841
4df7b76249a0
include Document.History in Document.State -- just one universal session state maintained by main actor;
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parents:
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diff
changeset
|
409 |
} |
38150
67fc24df3721
simplified/refined document model: collection of named nodes, without proper dependencies yet;
wenzelm
parents:
37849
diff
changeset
|
410 |
} |
34485 | 411 |
} |
34840
6c5560d48561
more precise treatment of document/state assigment;
wenzelm
parents:
34838
diff
changeset
|
412 |
} |
6c5560d48561
more precise treatment of document/state assigment;
wenzelm
parents:
34838
diff
changeset
|
413 |