Leonardo Campos committed
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@@ -1,306 +0,0 @@
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import { $ } from 'meteor/jquery';
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import { Tracker } from 'meteor/tracker';
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import { Session } from 'meteor/session';
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import { OHIF } from 'meteor/ohif:core';
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class PlayClipController {
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constructor(element, displaySet) {
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this._isPlaying = false;
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this.element = element;
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this.displaySet = displaySet;
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this._playComputation = null;
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}
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_getStackProgress() {
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return Session.get('StackProgress:' + this.displaySet.displaySetInstanceUid);
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}
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_getToolState(toolType) {
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const toolState = cornerstoneTools.getToolState(this.element, toolType);
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if (toolState && toolState.data) {
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return toolState.data[0];
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}
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}
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_countFramesByStatus(stackProgress, startIndex, endIndex, status) {
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const framesStatus = stackProgress.framesStatus;
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const framesCount = framesStatus.length;
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let currentIndex = startIndex;
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let count = 0;
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do {
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if (framesStatus[currentIndex] === status) {
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count++;
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}
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if(currentIndex === endIndex) {
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break;
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}
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currentIndex = (currentIndex + 1) % framesCount;
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} while (true)
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return count;
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}
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_isLoopEnabled() {
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const playClipToolState = this._getToolState('playClip');
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return playClipToolState && playClipToolState.loop;
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}
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_getCurrentIndex() {
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const stackToolState = this._getToolState('stack');
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return stackToolState.currentImageIdIndex || 0;
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}
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_isLastFrame() {
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const stackToolState = this._getToolState('stack');
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const currentIndex = (stackToolState && stackToolState.currentImageIdIndex) || 0;
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const imagesCount = stackToolState ? stackToolState.imageIds.length : 0;
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return (imagesCount === 0) || (currentIndex === imagesCount - 1);
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}
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_getFrameDistance(startIndex, endIndex) {
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const framesCount = this.displaySet.numImageFrames;
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return startIndex <= endIndex ? endIndex - startIndex : framesCount - (startIndex - endIndex);
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}
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_getLastRelativeFrame(startFrame) {
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const numImageFrames = this.displaySet.numImageFrames;
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if (this._isLoopEnabled()) {
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// Easiest way to get the previous index without having to check if it's negative
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return (startFrame + numImageFrames - 1) % numImageFrames;
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}
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// Return the last index of the array
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return numImageFrames - 1;
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}
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isPlaying() {
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return this._isPlaying;
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}
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play() {
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if (this._isPlaying) {
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return;
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}
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this._isPlaying = true;
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const playClipToolState = this._getToolState('playClip');
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const startIndex = this._getCurrentIndex();
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const endIndex = this._getLastRelativeFrame(startIndex);
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const framesToPlay = this._getFrameDistance(startIndex, endIndex);
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const playTimeRemaining = framesToPlay / playClipToolState.framesPerSecond;
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const play = playComputation => {
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playComputation.stop();
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try {
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cornerstoneTools.playClip(this.element);
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} catch(e) {
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console.log(e);
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}
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}
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this._playComputation = Tracker.autorun(playComputation => {
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const stackProgress = this._getStackProgress();
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if (!stackProgress) {
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return;
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} else if (!stackProgress.multiFrame) {
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play(playComputation);
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return;
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}
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const framesToLoad = this._countFramesByStatus(stackProgress, startIndex, endIndex, false);
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const loadTimeRemaining = framesToLoad / stackProgress.framesPerSecond;
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if ((stackProgress.percentComplete === 100) ||
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(loadTimeRemaining < playTimeRemaining)) {
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play(playComputation);
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this._attachNewImageListener();
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}
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});
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// Update the UpdateCINE session property
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Session.set('UpdateCINE', Random.id());
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}
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stop() {
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if (!this._isPlaying) {
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return;
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}
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if (this._playComputation) {
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this._playComputation.stop();
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this._playComputation = null;
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}
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try {
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cornerstoneTools.stopClip(this.element);
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} catch(e) {
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console.log(e);
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}
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this._isPlaying = false;
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this._detachNewImageListener();
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// Update the UpdateCINE session property
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Session.set('UpdateCINE', Random.id());
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}
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togglePlay() {
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if(this._isPlaying) {
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this.stop();
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} else {
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this.play();
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}
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}
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_isNextFrameLoaded() {
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const stackProgress = this._getStackProgress();
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if (!stackProgress || !stackProgress.framesStatus) {
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return;
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}
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const stackToolState = this._getToolState('stack');
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const currentImageIdIndex = stackToolState.currentImageIdIndex || 0;
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const isLoopEnabled = this._isLoopEnabled();
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let nextImageIndex = currentImageIdIndex + 1;
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if ((nextImageIndex >= stackToolState.imageIds.length) && isLoopEnabled) {
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nextImageIndex = 0;
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}
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return stackProgress.framesStatus && stackProgress.framesStatus[nextImageIndex];
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}
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_newImageEventHandler(e, eventData) {
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if (this._isLastFrame() && !this._isLoopEnabled()) {
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return this.stop();
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} else if (!this._isNextFrameLoaded()) {
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// Stop the clip and play it again in order to wait for the next frames (buffer)
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this.stop();
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this.play();
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}
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}
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_attachNewImageListener() {
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this._detachNewImageListener();
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$(this.element).on('CornerstoneNewImage.PlayClipManager', this._newImageEventHandler.bind(this));
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}
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_detachNewImageListener() {
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$(this.element).off('CornerstoneNewImage.PlayClipManager');
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}
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destroy() {
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this.stop();
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}
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}
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class PlayClipManager {
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constructor() {
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this.elementControllers = [];
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}
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add(element, displaySet) {
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const playClipController = new PlayClipController(element, displaySet);
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// Remove any other PlayClipController for this `element`
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this.remove(element);
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// Add the new PlayClipController for this `element`
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this.elementControllers.push({
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element,
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playClipController
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});
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return playClipController;
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}
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remove (element) {
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const index = this._indexOf(element);
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if (index === -1) {
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return;
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}
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const elementController = this.elementControllers[index];
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const playClipController = elementController.playClipController;
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playClipController.destroy();
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this.elementControllers.splice(index, 1);
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}
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get (element) {
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const index = this._indexOf(element);
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if (index >= 0) {
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const elementController = this.elementControllers[index];
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return elementController.playClipController;
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}
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}
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_indexOf(element) {
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const elementControllers = this.elementControllers;
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const length = elementControllers.length;
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for(let i = 0; i < length; i++) {
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if (elementControllers[i].element === element) {
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return i;
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}
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}
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return -1;
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}
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_forEach(callback) {
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const elementControllers = this.elementControllers;
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const length = elementControllers.length;
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for (let i = 0; i < length; i++) {
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const elementControllers = this.elementControllers[i];
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const element = elementControllers.element;
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const playClipController = elementControllers.playClipController;
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callback(element, playClipController);
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}
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}
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playAll() {
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this._forEach((element, playClipController) => {
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playClipController.play();
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});
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}
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stopAll() {
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this._forEach((element, playClipController) => {
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playClipController.stop();
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});
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}
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clear() {
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this._forEach((element, playClipController) => {
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playClipController.destroy();
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});
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this.elementControllers = [];
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}
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// Singleton
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static getInstance() {
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if (!PlayClipManager._instance) {
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PlayClipManager._instance = new PlayClipManager();
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}
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return PlayClipManager._instance;
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}
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}
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export { PlayClipManager };
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