DevTools: extract modules (with extensions)

third_party/WebKit/Source/devtools/front_end/components_lazy/FilmStripModel.js

-/*
- * Copyright 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.
- */
-
-/**
- * @unrestricted
- */
-Components.FilmStripModel = class {
-  /**
-   * @param {!SDK.TracingModel} tracingModel
-   * @param {number=} zeroTime
-   */
-  constructor(tracingModel, zeroTime) {
-    this.reset(tracingModel, zeroTime);
-  }
-
-  /**
-   * @param {!SDK.TracingModel} tracingModel
-   * @param {number=} zeroTime
-   */
-  reset(tracingModel, zeroTime) {
-    this._zeroTime = zeroTime || tracingModel.minimumRecordTime();
-    this._spanTime = tracingModel.maximumRecordTime() - this._zeroTime;
-
-    /** @type {!Array<!Components.FilmStripModel.Frame>} */
-    this._frames = [];
-    var browserMain = SDK.TracingModel.browserMainThread(tracingModel);
-    if (!browserMain)
-      return;
-
-    var events = browserMain.events();
-    for (var i = 0; i < events.length; ++i) {
-      var event = events[i];
-      if (event.startTime < this._zeroTime)
-        continue;
-      if (!event.hasCategory(Components.FilmStripModel._category))
-        continue;
-      if (event.name === Components.FilmStripModel.TraceEvents.CaptureFrame) {
-        var data = event.args['data'];
-        if (data)
-          this._frames.push(Components.FilmStripModel.Frame._fromEvent(this, event, this._frames.length));
-      } else if (event.name === Components.FilmStripModel.TraceEvents.Screenshot) {
-        this._frames.push(Components.FilmStripModel.Frame._fromSnapshot(
-            this, /** @type {!SDK.TracingModel.ObjectSnapshot} */ (event), this._frames.length));
-      }
-    }
-  }
-
-  /**
-   * @return {!Array<!Components.FilmStripModel.Frame>}
-   */
-  frames() {
-    return this._frames;
-  }
-
-  /**
-   * @return {number}
-   */
-  zeroTime() {
-    return this._zeroTime;
-  }
-
-  /**
-   * @return {number}
-   */
-  spanTime() {
-    return this._spanTime;
-  }
-
-  /**
-   * @param {number} timestamp
-   * @return {?Components.FilmStripModel.Frame}
-   */
-  frameByTimestamp(timestamp) {
-    var index = this._frames.upperBound(timestamp, (timestamp, frame) => timestamp - frame.timestamp) - 1;
-    return index >= 0 ? this._frames[index] : null;
-  }
-};
-
-Components.FilmStripModel._category = 'disabled-by-default-devtools.screenshot';
-
-Components.FilmStripModel.TraceEvents = {
-  CaptureFrame: 'CaptureFrame',
-  Screenshot: 'Screenshot'
-};
-
-/**
- * @unrestricted
- */
-Components.FilmStripModel.Frame = class {
-  /**
-   * @param {!Components.FilmStripModel} model
-   * @param {number} timestamp
-   * @param {number} index
-   */
-  constructor(model, timestamp, index) {
-    this._model = model;
-    this.timestamp = timestamp;
-    this.index = index;
-    /** @type {?string} */
-    this._imageData = null;
-    /** @type {?SDK.TracingModel.ObjectSnapshot} */
-    this._snapshot = null;
-  }
-
-  /**
-   * @param {!Components.FilmStripModel} model
-   * @param {!SDK.TracingModel.Event} event
-   * @param {number} index
-   * @return {!Components.FilmStripModel.Frame}
-   */
-  static _fromEvent(model, event, index) {
-    var frame = new Components.FilmStripModel.Frame(model, event.startTime, index);
-    frame._imageData = event.args['data'];
-    return frame;
-  }
-
-  /**
-   * @param {!Components.FilmStripModel} model
-   * @param {!SDK.TracingModel.ObjectSnapshot} snapshot
-   * @param {number} index
-   * @return {!Components.FilmStripModel.Frame}
-   */
-  static _fromSnapshot(model, snapshot, index) {
-    var frame = new Components.FilmStripModel.Frame(model, snapshot.startTime, index);
-    frame._snapshot = snapshot;
-    return frame;
-  }
-
-  /**
-   * @return {!Components.FilmStripModel}
-   */
-  model() {
-    return this._model;
-  }
-
-  /**
-   * @return {!Promise<?string>}
-   */
-  imageDataPromise() {
-    if (this._imageData || !this._snapshot)
-      return Promise.resolve(this._imageData);
-
-    return /** @type {!Promise<?string>} */ (this._snapshot.objectPromise());
-  }
-};