| <!DOCTYPE html> |
| <!-- |
| Copyright (c) 2015 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| |
| <link rel="import" href="/model/location.html"> |
| |
| <script> |
| 'use strict'; |
| |
| tr.exportTo('tr.ui.b', function() { |
| var Location = tr.model.Location; |
| |
| /** |
| * UIState is a class that represents the current state of the timeline by |
| * the Location of the point of interest and the current scaleX of the |
| * timeline. |
| * |
| * @constructor |
| */ |
| function UIState(location, scaleX) { |
| this.location_ = location; |
| this.scaleX_ = scaleX; |
| }; |
| |
| /** |
| * Accepts a UIState string in the format of (timestamp)@(stableID)x(scaleX) |
| * Returns undefined if string is not in this format, or throws an Error if |
| * variables in a syntactically-correct stateString does not produce a valid |
| * UIState. Otherwise returns a constructed UIState instance. |
| */ |
| UIState.fromUserFriendlyString = function(model, viewport, stateString) { |
| var navByFinderPattern = /^(-?\d+(\.\d+)?)@(.+)x(\d+(\.\d+)?)$/g; |
| var match = navByFinderPattern.exec(stateString); |
| if (!match) |
| return; |
| |
| var timestamp = parseFloat(match[1]); |
| var stableId = match[3]; |
| var scaleX = parseFloat(match[4]); |
| |
| if (scaleX <= 0) |
| throw new Error('Invalid ScaleX value in UI State string.'); |
| |
| if (!viewport.containerToTrackMap.getTrackByStableId(stableId)) |
| throw new Error('Invalid StableID given in UI State String.'); |
| |
| var loc = tr.model.Location.fromStableIdAndTimestamp( |
| viewport, stableId, timestamp); |
| return new UIState(loc, scaleX); |
| } |
| |
| UIState.prototype = { |
| |
| get location() { |
| return this.location_; |
| }, |
| |
| get scaleX() { |
| return this.scaleX_; |
| }, |
| |
| toUserFriendlyString: function(viewport) { |
| var timestamp = this.location_.xWorld; |
| var stableId = |
| this.location_.getContainingTrack(viewport).eventContainer.stableId; |
| var scaleX = this.scaleX_; |
| return timestamp.toFixed(5) + '@' + stableId + 'x' + scaleX.toFixed(5); |
| }, |
| |
| toDict: function() { |
| return { |
| location: this.location_.toDict(), |
| scaleX: this.scaleX_ |
| }; |
| } |
| }; |
| |
| return { |
| UIState: UIState |
| }; |
| }); |
| </script> |
