| 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294 | 4×
47×
47×
47×
47×
4×
4×
99×
99×
54×
54×
54×
99×
47×
99×
48×
99×
47×
99×
47×
99×
47×
99×
47×
99×
53×
4×
672×
672×
466×
47×
466×
206×
206×
206×
206×
206×
672×
184×
184×
15×
672×
4×
3165×
3165×
3165×
245×
2920×
639×
2281×
743×
1538×
797×
741×
741×
4×
262×
262×
262×
262×
64×
64×
64×
262×
87×
87×
87×
4×
112×
112×
10×
112×
33×
4×
1789×
4×
1077×
4×
4×
33×
33×
22×
22×
11×
11×
33×
4×
11×
16×
4×
16×
16×
16×
16×
136×
136×
16×
16×
168×
152×
56×
152×
152×
152×
152×
152×
152×
152×
152×
808×
808×
808×
808×
136×
136×
136×
16×
2×
14×
14×
14×
14×
48×
48×
14×
14×
16×
16×
16×
4×
47×
47×
47×
4×
| define(['utils', 'screenModel', 'IPlugin', 'errors'], function(Utils, Screen, IPlugin, Errors) {
"use strict";
/**
* @class
* Класс-менеджер моделей контента
* @constructor ScreenManager
* @extends IPlugin
*/
function ScreenManager() {
this._history = [];
this._curScreen = null;
this._relativeUpdateFn = this._updateRelativeScreen.bind(this);
Screen.registerUpdateFn(this._relativeUpdateFn);
}
Utils.inherite(ScreenManager, IPlugin);
/**
* Применить конфигурацию к панели. Учитывает опции maxHistoryLength, isDirectPath, cyclicStep, getLeft, getTop, getRight, getBottom.
* @param {Moving~config} config - конфигурация
* @memberOf ScreenManager
*/
ScreenManager.prototype.configure = function(config) {
Eif (typeof config === 'object') {
if (config.maxHistoryLength !== undefined) {
Eif (typeof config.maxHistoryLength === 'number' && config.maxHistoryLength >= 0) {
this._maxHistoryLength = config.maxHistoryLength;
Iif (this._history.length > this._maxHistoryLength) {
this._history = this._history.slice(this._history.length - this._maxHistoryLength);
}
} else {
throw new Errors.ArgumentError('maxHistoryLength', config.maxHistoryLength);
}
}
if (config.isDirectPath !== undefined) {
this._isDirectPath = config.isDirectPath;
}
if (config.cyclicStep !== undefined) {
this._cyclicStep = config.cyclicStep;
}
if (config.getLeft !== undefined) {
this._getLeft = config.getLeft;
}
if (config.getRight !== undefined) {
this._getRight = config.getRight;
}
if (config.getTop !== undefined) {
this._getTop = config.getTop;
}
if (config.getBottom !== undefined) {
this._getBottom = config.getBottom;
}
if (config.savePrevious !== undefined) {
this._savePrevious = config.savePrevious;
}
}
};
ScreenManager.prototype._updateScreens = function(side, screen, isSaveHistory) {
var updated = false;
if (screen) {
if (this._curScreen !== screen) {
updated = true;
}
this._curScreen = screen;
} else Eif (this.getRelativeScreen(side)) {
var prevScreen = this._curScreen;
this._curScreen = this.getRelativeScreen(side);
Eif (side !== 'center') {
updated = true;
}
}
if (updated && isSaveHistory !== false) {
this._history.push({
screen: prevScreen,
side: Utils.oppositeSide(side),
lastSide: this._lastSide,
lastScreen: this._lastScreen
});
if (this._history.length > this._maxHistoryLength) {
this._history.shift();
}
}
return this._curScreen;
};
ScreenManager.prototype._getRelativeScreenByScreen = function(screen, side) {
Iif (!(screen instanceof Screen)) {
throw new Errors.ArgumentError('screen', screen);
}
Iif (Utils.sidesWithCenter.indexOf(side) === -1) {
throw new Errors.ArgumentError('side', side);
}
if (side === 'center') {
return screen;
} else if (side === 'left') {
return this._getLeft(screen);
} else if (side === 'top') {
return this._getTop(screen, this._cyclicStep);
} else if (side === 'right') {
return this._getRight(screen);
} else Eif (side === 'bottom') {
return this._getBottom(screen, this._cyclicStep);
}
return null;
};
ScreenManager.prototype._setRelativeScreen = function(side, baseScreen, targetScreen, isCheckSave, reverse) {
Iif (!(targetScreen instanceof Screen)) {
throw new Errors.ArgumentError('targetScreen', targetScreen);
}
Iif (!(baseScreen instanceof Screen)) {
throw new Errors.ArgumentError('baseScreen', baseScreen);
}
var savePrevious = isCheckSave ? this._savePrevious : true;
if (side === (reverse ? 'left' : 'right') && savePrevious) {
var childIndex = baseScreen.getChildIndex(targetScreen);
Eif (childIndex !== -1) {
baseScreen.defaultChildIndex(childIndex);
} else {
throw new Errors.FatalError('Base screen is ' + baseScreen.toString() + '. Child screen not found: ', targetScreen.toString());
}
}
if (side === (reverse ? 'right' : 'left') && savePrevious) {
var parentIndex = baseScreen.getParentIndex(targetScreen);
Eif (parentIndex !== -1) {
baseScreen.defaultParentIndex(parentIndex);
} else {
throw new Errors.FatalError('Base screen is ' + baseScreen.toString() + '. Parent screen not found: ', targetScreen.toString());
}
}
};
ScreenManager.prototype._updateRelativeScreen = function(screen) {
Iif (!(screen instanceof Screen)) {
throw new Errors.ArgumentError('screen', screen);
}
if (!this._getRight(screen)) {
screen.defaultChildIndex(0);
}
if (!this._getLeft(screen)) {
screen.defaultParentIndex(0);
}
};
/**
* Возвращает модель текущей ячейки панели.
* @returns {ScreenModel|null} модель текущей ячейки панели
* @memberOf ScreenManager
*/
ScreenManager.prototype.getCurScreen = function() {
return this._curScreen;
};
/**
* Возвращает модель, располагающуюся рядом с текущей ячейкой панели.
* @param {string} side - сторона относительно текущей ячейки
* @returns {ScreenModel|null} модель текущей ячейки панели
* @memberOf ScreenManager
*/
ScreenManager.prototype.getRelativeScreen = function(side) {
return this._getRelativeScreenByScreen(this._curScreen, side);
};
/**
* Очистить историю перемещений в панели.
* @memberOf ScreenManager
*/
ScreenManager.prototype.clearHistory = function() {
this._history = [];
};
/**
* Удаляет из истории перемещений последнее удачное перемещение в панели и возвращает модель, которая располагается в последней посещенной ячейке из истории.
* @returns {ScreenModel} Модель из последнего удачного перемещения в истории
* @memberOf ScreenManager
*/
ScreenManager.prototype.popHistory = function() {
var res = this._history.pop();
if (res) {
this._lastSide = res.lastSide;
this._lastScreen = res.lastScreen;
} else {
this._lastSide = null;
this._lastScreen = null;
}
return res;
};
ScreenManager.prototype._containsHistory = function(screen) {
return this._history.some(function(val) {
return val.screen === screen;
});
};
/**
* Поиск кратчайшего пути от одной модели до другой. Если для разных ячеек панели используются одинаковые модели, результат непредсказуем.
* @param {ScreenModel} start - Модель, от которой начинает поиск пути
* @param {ScreenModel} end - Конечная модель, в которую ищется путь
* @returns {null|ScreenModel[]} Путь от начальной модели до конечной модели в панели
* @memberOf ScreenManager
*/
ScreenManager.prototype.findShortestPath = function (start, end) {
function findPaths(start, end) {
var costs = {},
open = {'0': [start]},
predecessors = {},
keys;
var addToOpen = function (cost, vertex) {
if (!open[cost]) open[cost] = [];
open[cost].push(vertex);
};
costs[start] = 0;
while (open) {
if(!(keys = Object.keys(open)).length) break;
keys.sort(function (a, b) {
return a - b;
});
var key = keys[0],
bucket = open[key],
node = bucket.shift(),
currentCost = +key,
adjacentNodes;
Eif (self._isDirectPath) {
adjacentNodes = node && node._children
.concat(node._parents)// todo если оставить только children будет настоящий поиск в графе
.concat(self._getRelativeScreenByScreen(node, 'top'))
.concat(self._getRelativeScreenByScreen(node, 'bottom')) || [];
} else {
adjacentNodes = node && [self._getRelativeScreenByScreen(node, 'left'),
self._getRelativeScreenByScreen(node, 'top'),
self._getRelativeScreenByScreen(node, 'right'),
self._getRelativeScreenByScreen(node, 'bottom')
] || [];
}
if (!bucket.length) delete open[key];
for (var i = 0; i < adjacentNodes.length; i++) {
var vertex = adjacentNodes[i],
totalCost = currentCost + 1,
vertexCost = costs[vertex];
if ((vertexCost === undefined) || (vertexCost > totalCost)) {
costs[vertex] = totalCost;
addToOpen(totalCost, vertex);
predecessors[vertex] = node;
}
}
}
if (costs[end] === undefined) {
return null;
} else {
return predecessors;
}
}
function extractShortest(predecessors, end) {
var nodes = [],
u = end;
while (u) {
nodes.push(u);
u = predecessors[u];
}
nodes.reverse();
return nodes;
}
var self = this;
var predecessors = findPaths(start, end);
return !predecessors ? null : extractShortest(predecessors, end);
};
/**
* Уничтожить ScreenManager
* @memberOf ScreenManager
*/
ScreenManager.prototype.destroy = function() {
Screen.unregisterUpdateFn(this._relativeUpdateFn);
this._history = null;
this._curScreen = null;
};
return ScreenManager;
}); |