/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    }
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
import * as Assert from '../../../common/assert';
import { onUnexpectedError } from '../../../common/errors';
import { combinedDisposable } from '../../../common/lifecycle';
import * as WinJS from '../../../common/winjs.base';
import { Emitter, once, EventMultiplexer, Relay } from '../../../common/event';
var LockData = /** @class */ (function () {
    function LockData(item) {
        this._onDispose = new Emitter();
        this.onDispose = this._onDispose.event;
        this._item = item;
    }
    Object.defineProperty(LockData.prototype, "item", {
        get: function () {
            return this._item;
        },
        enumerable: true,
        configurable: true
    });
    LockData.prototype.dispose = function () {
        if (this._onDispose) {
            this._onDispose.fire();
            this._onDispose.dispose();
            this._onDispose = null;
        }
    };
    return LockData;
}());
export { LockData };
var Lock = /** @class */ (function () {
    function Lock() {
        this.locks = Object.create({});
    }
    Lock.prototype.isLocked = function (item) {
        return !!this.locks[item.id];
    };
    Lock.prototype.run = function (item, fn) {
        var _this = this;
        var lock = this.getLock(item);
        if (lock) {
            return new WinJS.TPromise(function (c, e) {
                once(lock.onDispose)(function () {
                    return _this.run(item, fn).then(c, e);
                });
            });
        }
        var result;
        return new WinJS.TPromise(function (c, e) {
            if (item.isDisposed()) {
                return e(new Error('Item is disposed.'));
            }
            var lock = _this.locks[item.id] = new LockData(item);
            result = fn().then(function (r) {
                delete _this.locks[item.id];
                lock.dispose();
                return r;
            }).then(c, e);
            return result;
        });
    };
    Lock.prototype.getLock = function (item) {
        var key;
        for (key in this.locks) {
            var lock = this.locks[key];
            if (item.intersects(lock.item)) {
                return lock;
            }
        }
        return null;
    };
    return Lock;
}());
export { Lock };
var ItemRegistry = /** @class */ (function () {
    function ItemRegistry() {
        this._isDisposed = false;
        this._onDidRevealItem = new EventMultiplexer();
        this.onDidRevealItem = this._onDidRevealItem.event;
        this._onExpandItem = new EventMultiplexer();
        this.onExpandItem = this._onExpandItem.event;
        this._onDidExpandItem = new EventMultiplexer();
        this.onDidExpandItem = this._onDidExpandItem.event;
        this._onCollapseItem = new EventMultiplexer();
        this.onCollapseItem = this._onCollapseItem.event;
        this._onDidCollapseItem = new EventMultiplexer();
        this.onDidCollapseItem = this._onDidCollapseItem.event;
        this._onDidAddTraitItem = new EventMultiplexer();
        this.onDidAddTraitItem = this._onDidAddTraitItem.event;
        this._onDidRemoveTraitItem = new EventMultiplexer();
        this.onDidRemoveTraitItem = this._onDidRemoveTraitItem.event;
        this._onDidRefreshItem = new EventMultiplexer();
        this.onDidRefreshItem = this._onDidRefreshItem.event;
        this._onRefreshItemChildren = new EventMultiplexer();
        this.onRefreshItemChildren = this._onRefreshItemChildren.event;
        this._onDidRefreshItemChildren = new EventMultiplexer();
        this.onDidRefreshItemChildren = this._onDidRefreshItemChildren.event;
        this._onDidDisposeItem = new EventMultiplexer();
        this.onDidDisposeItem = this._onDidDisposeItem.event;
        this.items = {};
    }
    ItemRegistry.prototype.register = function (item) {
        Assert.ok(!this.isRegistered(item.id), 'item already registered: ' + item.id);
        var disposable = combinedDisposable([
            this._onDidRevealItem.add(item.onDidReveal),
            this._onExpandItem.add(item.onExpand),
            this._onDidExpandItem.add(item.onDidExpand),
            this._onCollapseItem.add(item.onCollapse),
            this._onDidCollapseItem.add(item.onDidCollapse),
            this._onDidAddTraitItem.add(item.onDidAddTrait),
            this._onDidRemoveTraitItem.add(item.onDidRemoveTrait),
            this._onDidRefreshItem.add(item.onDidRefresh),
            this._onRefreshItemChildren.add(item.onRefreshChildren),
            this._onDidRefreshItemChildren.add(item.onDidRefreshChildren),
            this._onDidDisposeItem.add(item.onDidDispose)
        ]);
        this.items[item.id] = { item: item, disposable: disposable };
    };
    ItemRegistry.prototype.deregister = function (item) {
        Assert.ok(this.isRegistered(item.id), 'item not registered: ' + item.id);
        this.items[item.id].disposable.dispose();
        delete this.items[item.id];
    };
    ItemRegistry.prototype.isRegistered = function (id) {
        return this.items.hasOwnProperty(id);
    };
    ItemRegistry.prototype.getItem = function (id) {
        var result = this.items[id];
        return result ? result.item : null;
    };
    ItemRegistry.prototype.dispose = function () {
        this.items = null;
        this._onDidRevealItem.dispose();
        this._onExpandItem.dispose();
        this._onDidExpandItem.dispose();
        this._onCollapseItem.dispose();
        this._onDidCollapseItem.dispose();
        this._onDidAddTraitItem.dispose();
        this._onDidRemoveTraitItem.dispose();
        this._onDidRefreshItem.dispose();
        this._onRefreshItemChildren.dispose();
        this._onDidRefreshItemChildren.dispose();
        this._isDisposed = true;
    };
    ItemRegistry.prototype.isDisposed = function () {
        return this._isDisposed;
    };
    return ItemRegistry;
}());
export { ItemRegistry };
var Item = /** @class */ (function () {
    function Item(id, registry, context, lock, element) {
        this._onDidCreate = new Emitter();
        this._onDidReveal = new Emitter();
        this.onDidReveal = this._onDidReveal.event;
        this._onExpand = new Emitter();
        this.onExpand = this._onExpand.event;
        this._onDidExpand = new Emitter();
        this.onDidExpand = this._onDidExpand.event;
        this._onCollapse = new Emitter();
        this.onCollapse = this._onCollapse.event;
        this._onDidCollapse = new Emitter();
        this.onDidCollapse = this._onDidCollapse.event;
        this._onDidAddTrait = new Emitter();
        this.onDidAddTrait = this._onDidAddTrait.event;
        this._onDidRemoveTrait = new Emitter();
        this.onDidRemoveTrait = this._onDidRemoveTrait.event;
        this._onDidRefresh = new Emitter();
        this.onDidRefresh = this._onDidRefresh.event;
        this._onRefreshChildren = new Emitter();
        this.onRefreshChildren = this._onRefreshChildren.event;
        this._onDidRefreshChildren = new Emitter();
        this.onDidRefreshChildren = this._onDidRefreshChildren.event;
        this._onDidDispose = new Emitter();
        this.onDidDispose = this._onDidDispose.event;
        this.registry = registry;
        this.context = context;
        this.lock = lock;
        this.element = element;
        this.id = id;
        this.registry.register(this);
        this.doesHaveChildren = this.context.dataSource.hasChildren(this.context.tree, this.element);
        this.needsChildrenRefresh = true;
        this.parent = null;
        this.previous = null;
        this.next = null;
        this.firstChild = null;
        this.lastChild = null;
        this.traits = {};
        this.depth = 0;
        this.expanded = this.context.dataSource.shouldAutoexpand && this.context.dataSource.shouldAutoexpand(this.context.tree, element);
        this._onDidCreate.fire(this);
        this.visible = this._isVisible();
        this.height = this._getHeight();
        this._isDisposed = false;
    }
    Item.prototype.getElement = function () {
        return this.element;
    };
    Item.prototype.hasChildren = function () {
        return this.doesHaveChildren;
    };
    Item.prototype.getDepth = function () {
        return this.depth;
    };
    Item.prototype.isVisible = function () {
        return this.visible;
    };
    Item.prototype.setVisible = function (value) {
        this.visible = value;
    };
    Item.prototype.isExpanded = function () {
        return this.expanded;
    };
    /* protected */ Item.prototype._setExpanded = function (value) {
        this.expanded = value;
    };
    Item.prototype.reveal = function (relativeTop) {
        if (relativeTop === void 0) { relativeTop = null; }
        var eventData = { item: this, relativeTop: relativeTop };
        this._onDidReveal.fire(eventData);
    };
    Item.prototype.expand = function () {
        var _this = this;
        if (this.isExpanded() || !this.doesHaveChildren || this.lock.isLocked(this)) {
            return WinJS.TPromise.as(false);
        }
        var result = this.lock.run(this, function () {
            if (_this.isExpanded() || !_this.doesHaveChildren) {
                return WinJS.TPromise.as(false);
            }
            var eventData = { item: _this };
            var result;
            _this._onExpand.fire(eventData);
            if (_this.needsChildrenRefresh) {
                result = _this.refreshChildren(false, true, true);
            }
            else {
                result = WinJS.TPromise.as(null);
            }
            return result.then(function () {
                _this._setExpanded(true);
                _this._onDidExpand.fire(eventData);
                return true;
            });
        });
        return result.then(function (r) {
            if (_this.isDisposed()) {
                return false;
            }
            // Auto expand single child folders
            if (_this.context.options.autoExpandSingleChildren && r && _this.firstChild !== null && _this.firstChild === _this.lastChild && _this.firstChild.isVisible()) {
                return _this.firstChild.expand().then(function () { return true; });
            }
            return r;
        });
    };
    Item.prototype.collapse = function (recursive) {
        var _this = this;
        if (recursive === void 0) { recursive = false; }
        if (recursive) {
            var collapseChildrenPromise = WinJS.TPromise.as(null);
            this.forEachChild(function (child) {
                collapseChildrenPromise = collapseChildrenPromise.then(function () { return child.collapse(true); });
            });
            return collapseChildrenPromise.then(function () {
                return _this.collapse(false);
            });
        }
        else {
            if (!this.isExpanded() || this.lock.isLocked(this)) {
                return WinJS.TPromise.as(false);
            }
            return this.lock.run(this, function () {
                var eventData = { item: _this };
                _this._onCollapse.fire(eventData);
                _this._setExpanded(false);
                _this._onDidCollapse.fire(eventData);
                return WinJS.TPromise.as(true);
            });
        }
    };
    Item.prototype.addTrait = function (trait) {
        var eventData = { item: this, trait: trait };
        this.traits[trait] = true;
        this._onDidAddTrait.fire(eventData);
    };
    Item.prototype.removeTrait = function (trait) {
        var eventData = { item: this, trait: trait };
        delete this.traits[trait];
        this._onDidRemoveTrait.fire(eventData);
    };
    Item.prototype.hasTrait = function (trait) {
        return this.traits[trait] || false;
    };
    Item.prototype.getAllTraits = function () {
        var result = [];
        var trait;
        for (trait in this.traits) {
            if (this.traits.hasOwnProperty(trait) && this.traits[trait]) {
                result.push(trait);
            }
        }
        return result;
    };
    Item.prototype.getHeight = function () {
        return this.height;
    };
    Item.prototype.refreshChildren = function (recursive, safe, force) {
        var _this = this;
        if (safe === void 0) { safe = false; }
        if (force === void 0) { force = false; }
        if (!force && !this.isExpanded()) {
            var setNeedsChildrenRefresh_1 = function (item) {
                item.needsChildrenRefresh = true;
                item.forEachChild(setNeedsChildrenRefresh_1);
            };
            setNeedsChildrenRefresh_1(this);
            return WinJS.TPromise.as(this);
        }
        this.needsChildrenRefresh = false;
        var doRefresh = function () {
            var eventData = { item: _this, isNested: safe };
            _this._onRefreshChildren.fire(eventData);
            var childrenPromise;
            if (_this.doesHaveChildren) {
                childrenPromise = _this.context.dataSource.getChildren(_this.context.tree, _this.element);
            }
            else {
                childrenPromise = WinJS.TPromise.as([]);
            }
            var result = childrenPromise.then(function (elements) {
                if (_this.isDisposed() || _this.registry.isDisposed()) {
                    return WinJS.TPromise.as(null);
                }
                if (!Array.isArray(elements)) {
                    return WinJS.TPromise.wrapError(new Error('Please return an array of children.'));
                }
                elements = !elements ? [] : elements.slice(0);
                elements = _this.sort(elements);
                var staleItems = {};
                while (_this.firstChild !== null) {
                    staleItems[_this.firstChild.id] = _this.firstChild;
                    _this.removeChild(_this.firstChild);
                }
                for (var i = 0, len = elements.length; i < len; i++) {
                    var element = elements[i];
                    var id = _this.context.dataSource.getId(_this.context.tree, element);
                    var item = staleItems[id] || new Item(id, _this.registry, _this.context, _this.lock, element);
                    item.element = element;
                    if (recursive) {
                        item.needsChildrenRefresh = recursive;
                    }
                    delete staleItems[id];
                    _this.addChild(item);
                }
                for (var staleItemId in staleItems) {
                    if (staleItems.hasOwnProperty(staleItemId)) {
                        staleItems[staleItemId].dispose();
                    }
                }
                if (recursive) {
                    return WinJS.Promise.join(_this.mapEachChild(function (child) {
                        return child.doRefresh(recursive, true);
                    }));
                }
                else {
                    return WinJS.Promise.join(_this.mapEachChild(function (child) {
                        if (child.isExpanded() && child.needsChildrenRefresh) {
                            return child.doRefresh(recursive, true);
                        }
                        else {
                            child.updateVisibility();
                            return WinJS.TPromise.as(null);
                        }
                    }));
                }
            });
            return result
                .then(null, onUnexpectedError)
                .then(function () { return _this._onDidRefreshChildren.fire(eventData); });
        };
        return safe ? doRefresh() : this.lock.run(this, doRefresh);
    };
    Item.prototype.doRefresh = function (recursive, safe) {
        if (safe === void 0) { safe = false; }
        this.doesHaveChildren = this.context.dataSource.hasChildren(this.context.tree, this.element);
        this.height = this._getHeight();
        this.updateVisibility();
        this._onDidRefresh.fire(this);
        return this.refreshChildren(recursive, safe);
    };
    Item.prototype.updateVisibility = function () {
        this.setVisible(this._isVisible());
    };
    Item.prototype.refresh = function (recursive) {
        return this.doRefresh(recursive);
    };
    Item.prototype.getNavigator = function () {
        return new TreeNavigator(this);
    };
    Item.prototype.intersects = function (other) {
        return this.isAncestorOf(other) || other.isAncestorOf(this);
    };
    Item.prototype.isAncestorOf = function (item) {
        while (item) {
            if (item.id === this.id) {
                return true;
            }
            item = item.parent;
        }
        return false;
    };
    Item.prototype.addChild = function (item, afterItem) {
        if (afterItem === void 0) { afterItem = this.lastChild; }
        var isEmpty = this.firstChild === null;
        var atHead = afterItem === null;
        var atTail = afterItem === this.lastChild;
        if (isEmpty) {
            this.firstChild = this.lastChild = item;
            item.next = item.previous = null;
        }
        else if (atHead) {
            this.firstChild.previous = item;
            item.next = this.firstChild;
            item.previous = null;
            this.firstChild = item;
        }
        else if (atTail) {
            this.lastChild.next = item;
            item.next = null;
            item.previous = this.lastChild;
            this.lastChild = item;
        }
        else {
            item.previous = afterItem;
            item.next = afterItem.next;
            afterItem.next.previous = item;
            afterItem.next = item;
        }
        item.parent = this;
        item.depth = this.depth + 1;
    };
    Item.prototype.removeChild = function (item) {
        var isFirstChild = this.firstChild === item;
        var isLastChild = this.lastChild === item;
        if (isFirstChild && isLastChild) {
            this.firstChild = this.lastChild = null;
        }
        else if (isFirstChild) {
            item.next.previous = null;
            this.firstChild = item.next;
        }
        else if (isLastChild) {
            item.previous.next = null;
            this.lastChild = item.previous;
        }
        else {
            item.next.previous = item.previous;
            item.previous.next = item.next;
        }
        item.parent = null;
        item.depth = null;
    };
    Item.prototype.forEachChild = function (fn) {
        var child = this.firstChild, next;
        while (child) {
            next = child.next;
            fn(child);
            child = next;
        }
    };
    Item.prototype.mapEachChild = function (fn) {
        var result = [];
        this.forEachChild(function (child) {
            result.push(fn(child));
        });
        return result;
    };
    Item.prototype.sort = function (elements) {
        var _this = this;
        if (this.context.sorter) {
            return elements.sort(function (element, otherElement) {
                return _this.context.sorter.compare(_this.context.tree, element, otherElement);
            });
        }
        return elements;
    };
    /* protected */ Item.prototype._getHeight = function () {
        return this.context.renderer.getHeight(this.context.tree, this.element);
    };
    /* protected */ Item.prototype._isVisible = function () {
        return this.context.filter.isVisible(this.context.tree, this.element);
    };
    Item.prototype.isDisposed = function () {
        return this._isDisposed;
    };
    Item.prototype.dispose = function () {
        this.forEachChild(function (child) { return child.dispose(); });
        this.parent = null;
        this.previous = null;
        this.next = null;
        this.firstChild = null;
        this.lastChild = null;
        this._onDidDispose.fire(this);
        this.registry.deregister(this);
        this._onDidCreate.dispose();
        this._onDidReveal.dispose();
        this._onExpand.dispose();
        this._onDidExpand.dispose();
        this._onCollapse.dispose();
        this._onDidCollapse.dispose();
        this._onDidAddTrait.dispose();
        this._onDidRemoveTrait.dispose();
        this._onDidRefresh.dispose();
        this._onRefreshChildren.dispose();
        this._onDidRefreshChildren.dispose();
        this._onDidDispose.dispose();
        this._isDisposed = true;
    };
    return Item;
}());
export { Item };
var RootItem = /** @class */ (function (_super) {
    __extends(RootItem, _super);
    function RootItem(id, registry, context, lock, element) {
        return _super.call(this, id, registry, context, lock, element) || this;
    }
    RootItem.prototype.isVisible = function () {
        return false;
    };
    RootItem.prototype.setVisible = function (value) {
        // no-op
    };
    RootItem.prototype.isExpanded = function () {
        return true;
    };
    /* protected */ RootItem.prototype._setExpanded = function (value) {
        // no-op
    };
    /* protected */ RootItem.prototype._getHeight = function () {
        return 0;
    };
    /* protected */ RootItem.prototype._isVisible = function () {
        return false;
    };
    return RootItem;
}(Item));
var TreeNavigator = /** @class */ (function () {
    function TreeNavigator(item, subTreeOnly) {
        if (subTreeOnly === void 0) { subTreeOnly = true; }
        this.item = item;
        this.start = subTreeOnly ? item : null;
    }
    TreeNavigator.lastDescendantOf = function (item) {
        if (!item) {
            return null;
        }
        if (item instanceof RootItem) {
            return TreeNavigator.lastDescendantOf(item.lastChild);
        }
        if (!item.isVisible()) {
            return TreeNavigator.lastDescendantOf(item.previous);
        }
        if (!item.isExpanded() || item.lastChild === null) {
            return item;
        }
        return TreeNavigator.lastDescendantOf(item.lastChild);
    };
    TreeNavigator.prototype.current = function () {
        return this.item || null;
    };
    TreeNavigator.prototype.next = function () {
        if (this.item) {
            do {
                if ((this.item instanceof RootItem || (this.item.isVisible() && this.item.isExpanded())) && this.item.firstChild) {
                    this.item = this.item.firstChild;
                }
                else if (this.item === this.start) {
                    this.item = null;
                }
                else {
                    // select next brother, next uncle, next great-uncle, etc...
                    while (this.item && this.item !== this.start && !this.item.next) {
                        this.item = this.item.parent;
                    }
                    if (this.item === this.start) {
                        this.item = null;
                    }
                    this.item = !this.item ? null : this.item.next;
                }
            } while (this.item && !this.item.isVisible());
        }
        return this.item || null;
    };
    TreeNavigator.prototype.previous = function () {
        if (this.item) {
            do {
                var previous = TreeNavigator.lastDescendantOf(this.item.previous);
                if (previous) {
                    this.item = previous;
                }
                else if (this.item.parent && this.item.parent !== this.start && this.item.parent.isVisible()) {
                    this.item = this.item.parent;
                }
                else {
                    this.item = null;
                }
            } while (this.item && !this.item.isVisible());
        }
        return this.item || null;
    };
    TreeNavigator.prototype.parent = function () {
        if (this.item) {
            var parent = this.item.parent;
            if (parent && parent !== this.start && parent.isVisible()) {
                this.item = parent;
            }
            else {
                this.item = null;
            }
        }
        return this.item || null;
    };
    TreeNavigator.prototype.first = function () {
        this.item = this.start;
        this.next();
        return this.item || null;
    };
    TreeNavigator.prototype.last = function () {
        return TreeNavigator.lastDescendantOf(this.start);
    };
    return TreeNavigator;
}());
export { TreeNavigator };
var TreeModel = /** @class */ (function () {
    function TreeModel(context) {
        this._onSetInput = new Emitter();
        this.onSetInput = this._onSetInput.event;
        this._onDidSetInput = new Emitter();
        this.onDidSetInput = this._onDidSetInput.event;
        this._onRefresh = new Emitter();
        this.onRefresh = this._onRefresh.event;
        this._onDidRefresh = new Emitter();
        this.onDidRefresh = this._onDidRefresh.event;
        this._onDidHighlight = new Emitter();
        this.onDidHighlight = this._onDidHighlight.event;
        this._onDidSelect = new Emitter();
        this.onDidSelect = this._onDidSelect.event;
        this._onDidFocus = new Emitter();
        this.onDidFocus = this._onDidFocus.event;
        this._onDidRevealItem = new Relay();
        this.onDidRevealItem = this._onDidRevealItem.event;
        this._onExpandItem = new Relay();
        this.onExpandItem = this._onExpandItem.event;
        this._onDidExpandItem = new Relay();
        this.onDidExpandItem = this._onDidExpandItem.event;
        this._onCollapseItem = new Relay();
        this.onCollapseItem = this._onCollapseItem.event;
        this._onDidCollapseItem = new Relay();
        this.onDidCollapseItem = this._onDidCollapseItem.event;
        this._onDidAddTraitItem = new Relay();
        this.onDidAddTraitItem = this._onDidAddTraitItem.event;
        this._onDidRemoveTraitItem = new Relay();
        this.onDidRemoveTraitItem = this._onDidRemoveTraitItem.event;
        this._onDidRefreshItem = new Relay();
        this.onDidRefreshItem = this._onDidRefreshItem.event;
        this._onRefreshItemChildren = new Relay();
        this.onRefreshItemChildren = this._onRefreshItemChildren.event;
        this._onDidRefreshItemChildren = new Relay();
        this.onDidRefreshItemChildren = this._onDidRefreshItemChildren.event;
        this._onDidDisposeItem = new Relay();
        this.context = context;
        this.input = null;
        this.traitsToItems = {};
    }
    TreeModel.prototype.setInput = function (element) {
        var _this = this;
        var eventData = { item: this.input };
        this._onSetInput.fire(eventData);
        this.setSelection([]);
        this.setFocus();
        this.setHighlight();
        this.lock = new Lock();
        if (this.input) {
            this.input.dispose();
        }
        if (this.registry) {
            this.registry.dispose();
            this.registryDisposable.dispose();
        }
        this.registry = new ItemRegistry();
        this._onDidRevealItem.input = this.registry.onDidRevealItem;
        this._onExpandItem.input = this.registry.onExpandItem;
        this._onDidExpandItem.input = this.registry.onDidExpandItem;
        this._onCollapseItem.input = this.registry.onCollapseItem;
        this._onDidCollapseItem.input = this.registry.onDidCollapseItem;
        this._onDidAddTraitItem.input = this.registry.onDidAddTraitItem;
        this._onDidRemoveTraitItem.input = this.registry.onDidRemoveTraitItem;
        this._onDidRefreshItem.input = this.registry.onDidRefreshItem;
        this._onRefreshItemChildren.input = this.registry.onRefreshItemChildren;
        this._onDidRefreshItemChildren.input = this.registry.onDidRefreshItemChildren;
        this._onDidDisposeItem.input = this.registry.onDidDisposeItem;
        this.registryDisposable = this.registry
            .onDidDisposeItem(function (item) { return item.getAllTraits().forEach(function (trait) { return delete _this.traitsToItems[trait][item.id]; }); });
        var id = this.context.dataSource.getId(this.context.tree, element);
        this.input = new RootItem(id, this.registry, this.context, this.lock, element);
        eventData = { item: this.input };
        this._onDidSetInput.fire(eventData);
        return this.refresh(this.input);
    };
    TreeModel.prototype.getInput = function () {
        return this.input ? this.input.getElement() : null;
    };
    TreeModel.prototype.refresh = function (element, recursive) {
        var _this = this;
        if (element === void 0) { element = null; }
        if (recursive === void 0) { recursive = true; }
        var item = this.getItem(element);
        if (!item) {
            return WinJS.TPromise.as(null);
        }
        var eventData = { item: item, recursive: recursive };
        this._onRefresh.fire(eventData);
        return item.refresh(recursive).then(function () {
            _this._onDidRefresh.fire(eventData);
        });
    };
    TreeModel.prototype.expand = function (element) {
        var item = this.getItem(element);
        if (!item) {
            return WinJS.TPromise.as(false);
        }
        return item.expand();
    };
    TreeModel.prototype.collapse = function (element, recursive) {
        if (recursive === void 0) { recursive = false; }
        var item = this.getItem(element);
        if (!item) {
            return WinJS.TPromise.as(false);
        }
        return item.collapse(recursive);
    };
    TreeModel.prototype.toggleExpansion = function (element, recursive) {
        if (recursive === void 0) { recursive = false; }
        return this.isExpanded(element) ? this.collapse(element, recursive) : this.expand(element);
    };
    TreeModel.prototype.isExpanded = function (element) {
        var item = this.getItem(element);
        if (!item) {
            return false;
        }
        return item.isExpanded();
    };
    TreeModel.prototype.reveal = function (element, relativeTop) {
        var _this = this;
        if (relativeTop === void 0) { relativeTop = null; }
        return this.resolveUnknownParentChain(element).then(function (chain) {
            var result = WinJS.TPromise.as(null);
            chain.forEach(function (e) {
                result = result.then(function () { return _this.expand(e); });
            });
            return result;
        }).then(function () {
            var item = _this.getItem(element);
            if (item) {
                return item.reveal(relativeTop);
            }
        });
    };
    TreeModel.prototype.resolveUnknownParentChain = function (element) {
        var _this = this;
        return this.context.dataSource.getParent(this.context.tree, element).then(function (parent) {
            if (!parent) {
                return WinJS.TPromise.as([]);
            }
            return _this.resolveUnknownParentChain(parent).then(function (result) {
                result.push(parent);
                return result;
            });
        });
    };
    TreeModel.prototype.setHighlight = function (element, eventPayload) {
        this.setTraits('highlighted', element ? [element] : []);
        var eventData = { highlight: this.getHighlight(), payload: eventPayload };
        this._onDidHighlight.fire(eventData);
    };
    TreeModel.prototype.getHighlight = function (includeHidden) {
        var result = this.getElementsWithTrait('highlighted', includeHidden);
        return result.length === 0 ? null : result[0];
    };
    TreeModel.prototype.setSelection = function (elements, eventPayload) {
        this.setTraits('selected', elements);
        var eventData = { selection: this.getSelection(), payload: eventPayload };
        this._onDidSelect.fire(eventData);
    };
    TreeModel.prototype.getSelection = function (includeHidden) {
        return this.getElementsWithTrait('selected', includeHidden);
    };
    TreeModel.prototype.setFocus = function (element, eventPayload) {
        this.setTraits('focused', element ? [element] : []);
        var eventData = { focus: this.getFocus(), payload: eventPayload };
        this._onDidFocus.fire(eventData);
    };
    TreeModel.prototype.getFocus = function (includeHidden) {
        var result = this.getElementsWithTrait('focused', includeHidden);
        return result.length === 0 ? null : result[0];
    };
    TreeModel.prototype.focusNext = function (count, eventPayload) {
        if (count === void 0) { count = 1; }
        var item = this.getFocus() || this.input;
        var nextItem;
        var nav = this.getNavigator(item, false);
        for (var i = 0; i < count; i++) {
            nextItem = nav.next();
            if (!nextItem) {
                break;
            }
            item = nextItem;
        }
        this.setFocus(item, eventPayload);
    };
    TreeModel.prototype.focusPrevious = function (count, eventPayload) {
        if (count === void 0) { count = 1; }
        var item = this.getFocus() || this.input;
        var previousItem;
        var nav = this.getNavigator(item, false);
        for (var i = 0; i < count; i++) {
            previousItem = nav.previous();
            if (!previousItem) {
                break;
            }
            item = previousItem;
        }
        this.setFocus(item, eventPayload);
    };
    TreeModel.prototype.focusParent = function (eventPayload) {
        var item = this.getFocus() || this.input;
        var nav = this.getNavigator(item, false);
        var parent = nav.parent();
        if (parent) {
            this.setFocus(parent, eventPayload);
        }
    };
    TreeModel.prototype.focusFirstChild = function (eventPayload) {
        var item = this.getItem(this.getFocus() || this.input);
        var nav = this.getNavigator(item, false);
        var next = nav.next();
        var parent = nav.parent();
        if (parent === item) {
            this.setFocus(next, eventPayload);
        }
    };
    TreeModel.prototype.focusFirst = function (eventPayload, from) {
        this.focusNth(0, eventPayload, from);
    };
    TreeModel.prototype.focusNth = function (index, eventPayload, from) {
        var navItem = this.getParent(from);
        var nav = this.getNavigator(navItem);
        var item = nav.first();
        for (var i = 0; i < index; i++) {
            item = nav.next();
        }
        if (item) {
            this.setFocus(item, eventPayload);
        }
    };
    TreeModel.prototype.focusLast = function (eventPayload, from) {
        var navItem = this.getParent(from);
        var item;
        if (from) {
            item = navItem.lastChild;
        }
        else {
            var nav = this.getNavigator(navItem);
            item = nav.last();
        }
        if (item) {
            this.setFocus(item, eventPayload);
        }
    };
    TreeModel.prototype.getParent = function (from) {
        if (from) {
            var fromItem = this.getItem(from);
            if (fromItem && fromItem.parent) {
                return fromItem.parent;
            }
        }
        return this.getItem(this.input);
    };
    TreeModel.prototype.getNavigator = function (element, subTreeOnly) {
        if (element === void 0) { element = null; }
        if (subTreeOnly === void 0) { subTreeOnly = true; }
        return new TreeNavigator(this.getItem(element), subTreeOnly);
    };
    TreeModel.prototype.getItem = function (element) {
        if (element === void 0) { element = null; }
        if (element === null) {
            return this.input;
        }
        else if (element instanceof Item) {
            return element;
        }
        else if (typeof element === 'string') {
            return this.registry.getItem(element);
        }
        else {
            return this.registry.getItem(this.context.dataSource.getId(this.context.tree, element));
        }
    };
    TreeModel.prototype.removeTraits = function (trait, elements) {
        var items = this.traitsToItems[trait] || {};
        var item;
        var id;
        if (elements.length === 0) {
            for (id in items) {
                if (items.hasOwnProperty(id)) {
                    item = items[id];
                    item.removeTrait(trait);
                }
            }
            delete this.traitsToItems[trait];
        }
        else {
            for (var i = 0, len = elements.length; i < len; i++) {
                item = this.getItem(elements[i]);
                if (item) {
                    item.removeTrait(trait);
                    delete items[item.id];
                }
            }
        }
    };
    TreeModel.prototype.setTraits = function (trait, elements) {
        if (elements.length === 0) {
            this.removeTraits(trait, elements);
        }
        else {
            var items = {};
            var item;
            for (var i = 0, len = elements.length; i < len; i++) {
                item = this.getItem(elements[i]);
                if (item) {
                    items[item.id] = item;
                }
            }
            var traitItems = this.traitsToItems[trait] || {};
            var itemsToRemoveTrait = [];
            var id;
            for (id in traitItems) {
                if (traitItems.hasOwnProperty(id)) {
                    if (items.hasOwnProperty(id)) {
                        delete items[id];
                    }
                    else {
                        itemsToRemoveTrait.push(traitItems[id]);
                    }
                }
            }
            for (var i = 0, len = itemsToRemoveTrait.length; i < len; i++) {
                item = itemsToRemoveTrait[i];
                item.removeTrait(trait);
                delete traitItems[item.id];
            }
            for (id in items) {
                if (items.hasOwnProperty(id)) {
                    item = items[id];
                    item.addTrait(trait);
                    traitItems[id] = item;
                }
            }
            this.traitsToItems[trait] = traitItems;
        }
    };
    TreeModel.prototype.getElementsWithTrait = function (trait, includeHidden) {
        var elements = [];
        var items = this.traitsToItems[trait] || {};
        var id;
        for (id in items) {
            if (items.hasOwnProperty(id) && (items[id].isVisible() || includeHidden)) {
                elements.push(items[id].getElement());
            }
        }
        return elements;
    };
    TreeModel.prototype.dispose = function () {
        if (this.registry) {
            this.registry.dispose();
            this.registry = null;
        }
        this._onSetInput.dispose();
        this._onDidSetInput.dispose();
        this._onRefresh.dispose();
        this._onDidRefresh.dispose();
        this._onDidHighlight.dispose();
        this._onDidSelect.dispose();
        this._onDidFocus.dispose();
        this._onDidRevealItem.dispose();
        this._onExpandItem.dispose();
        this._onDidExpandItem.dispose();
        this._onCollapseItem.dispose();
        this._onDidCollapseItem.dispose();
        this._onDidAddTraitItem.dispose();
        this._onDidRemoveTraitItem.dispose();
        this._onDidRefreshItem.dispose();
        this._onRefreshItemChildren.dispose();
        this._onDidRefreshItemChildren.dispose();
        this._onDidDisposeItem.dispose();
    };
    return TreeModel;
}());
export { TreeModel };
