rx-player
Version:
Canal+ HTML5 Video Player
58 lines (55 loc) • 2.28 kB
text/typescript
/**
* Copyright 2015 CANAL+ Group
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import type { ITNode } from "../../../../../../utils/xml-parser";
import type { IIndexSegment } from "../../../../utils/index_helpers";
import convertElementsToIndexSegment from "./convert_element_to_index_segment";
import type { IParsedS } from "./parse_s_element";
import { parseSElementNode, parseSHTMLElement } from "./parse_s_element";
/**
* Allows to generate the "timeline" for the "Timeline" RepresentationIndex.
* Call this function when the timeline is unknown.
* This function was added to only perform that task lazily, i.e. only when
* first needed.
* @param {Array.<Object>|HTMLCollection} elements - All S nodes constituting
* the corresponding SegmentTimeline node.
* @returns {Array.<Object>}
*/
export default function constructTimelineFromElements(
elements: ITNode[] | HTMLCollection,
): IIndexSegment[] {
const initialTimeline: IParsedS[] = [];
if (Array.isArray(elements)) {
for (let i = 0; i < elements.length; i++) {
initialTimeline.push(parseSElementNode(elements[i]));
}
} else {
for (let i = 0; i < elements.length; i++) {
initialTimeline.push(parseSHTMLElement(elements[i]));
}
}
const timeline: IIndexSegment[] = [];
for (let i = 0; i < initialTimeline.length; i++) {
const item = initialTimeline[i];
const previousItem =
timeline[timeline.length - 1] === undefined ? null : timeline[timeline.length - 1];
const nextItem = initialTimeline[i + 1] === undefined ? null : initialTimeline[i + 1];
const timelineElement = convertElementsToIndexSegment(item, previousItem, nextItem);
if (timelineElement !== null) {
timeline.push(timelineElement);
}
}
return timeline;
}