Remove service-compiler related code.

samples/todomvc/dart/todomvc_presenter_model.dart

-// Copyright (c) 2015, the Dartino project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE.md file.
-
-// Should become auto-generated.
-
-library todomvc_presenter_model;
-
-import 'todomvc_service.dart';
-
-/*
-  The presentation model should be generated by a terse description.
-  For example, the presenter model for this sample might have been declared as:
-
-  struct Immutable {
-    union {
-      Atom;
-      Cons;
-    }
-  }
-
-  struct Atom {
-    union {
-      void nil;
-      int32 num;
-      bool truth;
-      String str;
-    }
-  }
-
-  struct Cons {
-    Immutable fst;
-    Immutable snd;
-  }
-
-  service TodoListPresenter {
-    void Create(String);
-    void Delete(Int32);
-    void Complete(Int32);
-    void Clear();
-  }
-
-  From the description we would generate dart classes and their path descriptors
-  for each struct together with the diff algorithm. For services we would create
-  command descriptors. All of these would come with serialization support for
-  wire transfer.
-
-  Until then, all of the above is implemented below.
-
- */
-
-// Tracing to ease debugging on dartino...
-bool TRACE = false;
-void trace(obj) { if (TRACE) print("  $obj"); }
-
-// Some constants.
-
-const TAG_CONS_FST = 0;
-const TAG_CONS_SND = 1;
-const TAG_CONS_DELETE_EVENT = 2;
-const TAG_CONS_COMPLETE_EVENT = 3;
-const TAG_CONS_UNCOMPLETE_EVENT = 4;
-
-// The event manager maintains a mapping from the active handler ids transferred
-// as part of the presentation graph to the handler callbacks.
-class EventManager {
-  Map<int, EventHandler> _handlers = new Map();
-
-  int _lfsr = 0xABBA;
-
-  int get _next {
-    // 16 bits with taps 16, 14, 13, 11.
-    int lfsr = _lfsr;
-    int bit = ((lfsr >> 0) ^ (lfsr >> 2) ^ (lfsr >> 3) ^ (lfsr >> 5)) & 1;
-    lfsr = (lfsr >> 1) | (bit << 15);
-    _lfsr = lfsr;
-    return lfsr;
-  }
-
-  int register(EventHandler handler) {
-    if (handler == null) return 0;
-    if (handler.allocated) {
-      // After event manager reset we must re-register event handlers.
-      int id = handler.id;
-      EventHandler registered = _handlers[id];
-      if (registered == null) {
-        _handlers[id] = handler;
-      } else if (registered != handler) {
-        print("ERROR: attempt to re-register event handler: $id");
-      }
-      return id;
-    }
-    int id = _next;
-    // TODO(zerny): Do something clever once completing the lfsr sequence.
-    while (_handlers.containsKey(id)) id = _next;
-    trace("registered event-handler id: $id");
-    _handlers[id] = handler;
-    handler.allocate(id);
-    return id;
-  }
-
-  void unregister(EventHandler handler) {
-    if (handler == null) return;
-    // TODO(zerny): replace by assert.
-    int id = handler.id;
-    if (!handler.allocated) {
-      print("ERROR: attempt to unregister unallocated event handler: $id");
-      return;
-    }
-    trace("unregistered event-handler id: $id");
-    assert(_handlers[id] == handler);
-    handler.delete();
-    _handlers.remove(id);
-  }
-
-  void call(int id) {
-    assert(id > 0);
-    EventHandler handler = _handlers[id];
-    if (handler == null) {
-      print("ERROR: attempt to call non-exisiting event handler: $id");
-      return;
-    }
-    handler.call();
-  }
-
-  void clear() {
-    _handlers.clear();
-  }
-}
-
-// Immutable model for the presentation (reused as a mutable mirror on the
-// "host" side).  (just sexp to simulate a "rich structure" for now)
-
-abstract class Immutable {
-  void diff(Immutable other, Path path, MyPatchSet patches);
-  void serialize(NodeBuilder builder, EventManager events);
-  void unregisterEvents(EventManager events);
-}
-
-class EventHandler extends Immutable {
-  final Function _handler;
-  int _id = 0;
-
-  EventHandler(this._handler);
-
-  int get id => _id;
-  bool get allocated => _id > 0;
-  bool get deleted => _id < 0;
-
-  void call() {
-    assert(allocated);
-    _handler();
-  }
-
-  void allocate(int id) {
-    assert(!deleted);
-    _id = id;
-  }
-
-  void delete() {
-    _id = -1;
-  }
-
-  static void staticDiff(EventHandler self,
-                         EventHandler other,
-                         Path path,
-                         MyPatchSet patches) {
-    if (identical(self, other)) return;
-    // TODO(zerny): Do we want to consider another definition of equality here?
-    // Currently only the same physically allocated event-handler object is
-    // considered "the same", but we could refine that to be if the _handler
-    // object is "the same" (which it typically won't be because of closure
-    // allocation). Also, if we do so, we need to make sure that the allocated
-    // event ids are updated to be the same too, otherwise we could end up with
-    // an unallocated event handler being referenced from the binding layer.
-    patches.add(path, self, other);
-  }
-
-  void diff(Immutable other, Path path, MyPatchSet patches) {
-    EventHandler.staticDiff(this, other, path, patches);
-  }
-
-  // TODO(zerny): Event handler fields should not be encoded in Node.
-  void serialize(NodeBuilder builder, EventManager events) {
-    builder.num = events.register(this);
-  }
-
-  void unregisterEvents(EventManager events) {
-    events.unregister(this);
-  }
-}
-
-abstract class Atom extends Immutable {
-  final value;
-  Atom(this.value) {
-    trace("Allocating Atom");
-  }
-  String toString() => "value($value)";
-
-  void diff(Immutable other, Path path, MyPatchSet patches) {
-    trace("Atom::diff $this ~=~ $other");
-    if (other is Atom && value == other.value)
-      return;
-    patches.add(path, this, other);
-  }
-
-  void unregisterEvents(EventManager events) { }
-}
-
-class Cons extends Immutable {
-  final Immutable fst, snd;
-  final EventHandler deleteEvent, completeEvent, uncompleteEvent;
-
-  Cons(this.fst, this.snd,
-       [ this.deleteEvent,
-         this.completeEvent,
-         this.uncompleteEvent ]) {
-    trace("Allocating Cons");
-  }
-
-  String toString() => "($fst . $snd)";
-
-  void diff(Immutable other, Path path, MyPatchSet patches) {
-    if (identical(this, other)) return;
-    if (other is! Cons) {
-      patches.add(path, this, other);
-      return;
-    }
-    Cons otherCons = other;
-    fst.diff(otherCons.fst, new ConsFst(path), patches);
-    snd.diff(otherCons.snd, new ConsSnd(path), patches);
-    EventHandler.staticDiff(
-        deleteEvent,
-        otherCons.deleteEvent,
-        new ConsDeleteEvent(path), patches);
-    EventHandler.staticDiff(
-        completeEvent,
-        otherCons.completeEvent,
-        new ConsCompleteEvent(path), patches);
-    EventHandler.staticDiff(
-        uncompleteEvent,
-        otherCons.uncompleteEvent,
-        new ConsUncompleteEvent(path), patches);
-  }
-
-  void serialize(NodeBuilder builder, EventManager events) {
-    trace("Cons::serialize: $this");
-    ConsBuilder cons = builder.initCons();
-    cons.deleteEvent = events.register(deleteEvent);
-    cons.completeEvent = events.register(completeEvent);
-    cons.uncompleteEvent = events.register(uncompleteEvent);
-    fst.serialize(cons.initFst(), events);
-    snd.serialize(cons.initSnd(), events);
-  }
-
-  void unregisterEvents(EventManager events) {
-    events.unregister(deleteEvent);
-    events.unregister(completeEvent);
-    events.unregister(uncompleteEvent);
-    fst.unregisterEvents(events);
-    snd.unregisterEvents(events);
-  }
-}
-
-class Nil extends Atom {
-  Nil() : super(null);
-  void serialize(NodeBuilder builder, EventManager events) {
-    trace("Nil::serialize");
-    builder.setNil();
-  }
-}
-
-class Bool extends Atom {
-  Bool(bool value) : super(value);
-  void serialize(NodeBuilder builder, EventManager events) {
-    trace("Bool::serialize: $this");
-    builder.truth = value;
-  }
-}
-
-class Num extends Atom {
-  Num(num value) : super(value);
-  void serialize(NodeBuilder builder, EventManager events) {
-    trace("Num::serialize: $this");
-    builder.num = value;
-  }
-}
-
-class Str extends Atom {
-  Str(String value) : super(value);
-  void serialize(NodeBuilder builder, EventManager events) {
-    trace("Str::serialize: $this");
-    builder.str = value;
-  }
-}
-
-
-// Path in the immutable model. (We probably won't need an actual representation
-// of these. We could just construct the serialized form on the fly).
-
-// Note that (serialize) reverses the path description. Ie, we construct the
-// path 'inside-out' and read it 'outside-in' on the host side.
-
-abstract class Path {
-  final Path parent;
-  Path(this.parent);
-  int get tag;
-
-  static void serialize(Path inner, PatchBuilder builder) {
-    trace("Path::serialize: path($inner)");
-    int length = 0;
-    for (Path current = inner; current != null; current = current.parent) {
-      ++length;
-    }
-    var out = builder.initPath(length);
-    for (Path current = inner; current != null; current = current.parent) {
-      out[--length] = current.tag;
-    }
-  }
-
-  String toString() => "$parent;$tag";
-}
-
-class ConsFst extends Path {
-  ConsFst(Path parent) : super(parent);
-  int get tag => TAG_CONS_FST;
-}
-
-class ConsSnd extends Path {
-  ConsSnd(Path parent) : super(parent);
-  int get tag => TAG_CONS_SND;
-}
-
-class ConsDeleteEvent extends Path {
-  ConsDeleteEvent(Path parent) : super(parent);
-  int get tag => TAG_CONS_DELETE_EVENT;
-}
-
-class ConsCompleteEvent extends Path {
-  ConsCompleteEvent(Path parent) : super(parent);
-  int get tag => TAG_CONS_COMPLETE_EVENT;
-}
-
-class ConsUncompleteEvent extends Path {
-  ConsUncompleteEvent(Path parent) : super(parent);
-  int get tag => TAG_CONS_UNCOMPLETE_EVENT;
-}
-
-// Patch description
-
-class MyPatchSet {
-  List<Patch> patches = new List<Patch>();
-  add(Path path, Immutable content, Immutable oldContent) =>
-      patches.add(new Patch(path, content, oldContent));
-
-  void serialize(PatchSetBuilder builder, EventManager events) {
-    var length = patches.length;
-    trace("MyPatchSet::serialize: length($length)");
-    var out = builder.initPatches(patches.length);
-    for (int i = 0; i < length; ++i) {
-      patches[i].serialize(out[i], events);
-    }
-  }
-}
-
-class Patch {
-  Path path;
-  Immutable content;
-  Immutable oldContent;
-  Patch(this.path, this.content, this.oldContent);
-
-  void serialize(PatchBuilder builder, EventManager events) {
-    trace("Patch::serialize");
-    oldContent.unregisterEvents(events);
-    Path.serialize(path, builder);
-    content.serialize(builder.initContent(), events);
-  }
-}