455 lines
12 KiB
JavaScript
455 lines
12 KiB
JavaScript
if(Debug.debug)
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console.log("Loading: Resizer.js");
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var StretchMode = {
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NO_STRETCH: 0,
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BASIC: 1,
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HYBRID: 2,
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CONDITIONAL: 3
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}
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class Resizer {
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constructor(videoData){
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this.conf = videoData;
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this.video = videoData.video;
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this.settings = videoData.settings;
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this.scaler = new Scaler(this.conf);
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this.stretcher = new Stretcher(this.conf);
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this.zoom = new Zoom(this.conf);
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// load up default values
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this.correctedVideoDimensions = {};
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this.currentCss = {};
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this.currentStyleString = "";
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this.currentCssValidFor = {};
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// restore watchdog. While true, applyCss() tries to re-apply new css until this value becomes false again
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// value becomes false when width and height of <video> tag match with what we want to set. Only necessary when
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// calling _res_restore() for some weird reason.
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this.restore_wd = false;
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// CSS watcher will trigger _very_ often for this many iterations
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this.cssWatcherIncreasedFrequencyCounter = 0;
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this.lastAr = this.settings.getDefaultAr(); // this is the aspect ratio we start with
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this.videoFloat = this.settings.getDefaultVideoAlignment(); // this is initial video alignment
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this.destroyed = false;
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this.resizerId = (Math.random(99)*100).toFixed(0);
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if (this.settings.active.pan) {
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console.log("can pan:", this.settings.active.miscFullscreenSettings.mousePan.enabled, "(default:", this.settings.active.miscFullscreenSettings.mousePan.enabled, ")")
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this.canPan = this.settings.active.miscFullscreenSettings.mousePan.enabled;
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} else {
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this.canPan = false;
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}
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}
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start(){
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this.startCssWatcher();
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}
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stop(){
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this.stopCssWatcher();
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}
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destroy(){
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if(Debug.debug){
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console.log(`[Resizer::destroy] <rid:${this.resizerId}> received destroy command.`);
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}
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this.destroyed = true;
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this.stopCssWatcher();
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}
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setAr(ar, lastAr){
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if (this.destroyed) {
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return;
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}
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this.startCssWatcher();
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this.cssWatcherIncreasedFrequencyCounter = 20;
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if(Debug.debug){
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console.log('[Resizer::setAr] <rid:'+this.resizerId+'> trying to set ar. New ar:', ar)
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}
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if(lastAr) {
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this.lastAr = lastAr;
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} else {
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if(isNaN(ar)){
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this.lastAr = {type: 'legacy', ar: ar}
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} else {
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this.lastAr = {type: 'static', ar: ar};
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}
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}
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if (! this.video) {
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// console.log("No video detected.")
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this.videoData.destroy();
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}
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// pause AR on basic stretch, unpause when using other mdoes
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// fir sine reason unpause doesn't unpause. investigate that later
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// if (this.stretcher.mode === StretchMode.BASIC) {
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// this.conf.arDetector.pause();
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// } else {
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// this.conf.arDetector.unpause();
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// }
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// do stretch thingy
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if (this.stretcher.mode === StretchMode.NO_STRETCH || this.stretcher.mode === StretchMode.CONDITIONAL){
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var stretchFactors = this.scaler.calculateCrop(ar);
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if(! stretchFactors || stretchFactors.error){
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if(Debug.debug){
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console.log("[Resizer::setAr] <rid:"+this.resizerId+"> failed to set AR due to problem with calculating crop. Error:", (stretchFactors ? stretchFactors.error : stretchFactors));
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}
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if(stretchFactors.error === 'no_video'){
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this.conf.destroy();
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}
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return;
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}
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if(this.stretcher.mode === StretchMode.CONDITIONAL){
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this.stretcher.applyConditionalStretch(stretchFactors, ar);
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}
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} else if (this.stretcher.mode === StretchMode.HYBRID) {
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var stretchFactors = this.stretcher.calculateStretch(ar);
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} else if (this.stretcher.mode === StretchMode.BASIC) {
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var stretchFactors = this.stretcher.calculateBasicStretch();
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}
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this.zoom.applyZoom(stretchFactors);
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//TODO: correct these two
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var translate = this.computeOffsets(stretchFactors);
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this.applyCss(stretchFactors, translate);
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}
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resetLastAr() {
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this.lastAr = {type: 'original'};
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}
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setLastAr(override){
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this.lastAr = override;
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}
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getLastAr(){
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return this.lastAr;
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}
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setStretchMode(stretchMode){
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this.stretcher.mode = stretchMode;
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this.restore();
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}
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panHandler(event) {
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// console.log("this.conf.canPan:", this.conf.canPan)
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if (this.canPan) {
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// console.log("event?", event)
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// console.log("this?", this)
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if(!this.conf.player || !this.conf.player.element) {
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return;
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}
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const player = this.conf.player.element;
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const relativeX = (event.pageX - player.offsetLeft) / player.offsetWidth;
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const relativeY = (event.pageY - player.offsetTop) / player.offsetHeight;
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this.setPan(relativeX, relativeY);
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}
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}
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setPan(relativeMousePosX, relativeMousePosY){
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// relativeMousePos[X|Y] - on scale from 0 to 1, how close is the mouse to player edges.
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// use these values: top, left: 0, bottom, right: 1
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if(! this.pan){
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this.pan = {};
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}
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this.pan.relativeOffsetX = -(relativeMousePosX * 1.1) + 0.55;
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this.pan.relativeOffsetY = -(relativeMousePosY * 1.1) + 0.55;
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// if(Debug.debug){
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// console.log("[Resizer::setPan] relative cursor pos:", relativeMousePosX, ",",relativeMousePosY, " | new pan obj:", this.pan)
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// }
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this.restore();
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}
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startCssWatcher(){
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if (this.destroyed) {
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return;
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}
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// this.haltCssWatcher = false;
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if(!this.cssWatcherTimer){
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this.scheduleCssWatcher(1);
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} else {
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clearTimeout(this.cssWatcherTimer);
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this.scheduleCssWatcher(1);
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}
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}
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scheduleCssWatcher(timeout, force_reset) {
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if (this.destroyed) {
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return;
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}
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if(timeout === undefined) {
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console.log("?")
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this.cssCheck(); // no timeout = one-off
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return;
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}
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if(this.cssWatcherTimeout) {
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clearTimeout(this.cssWatcherTimer);
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}
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var ths = this;
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this.cssWatcherTimer = setTimeout(function () {
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ths.cssWatcherTimer = null;
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try {
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ths.cssCheck();
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} catch (e) {
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if(Debug.debug) {
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console.log("[Resizer.js::scheduleCssWatcher] Css check failed. Error:", e);
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}
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}
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}, timeout);
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}
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stopCssWatcher() {
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if(Debug.debug) console.log("[Resizer.js] STOPPING CSS WATCHER!")
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clearInterval(this.cssWatcherTimeout);
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}
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restore() {
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if(Debug.debug){
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console.log("[Resizer::restore] <rid:"+this.resizerId+"> attempting to restore aspect ratio. this & settings:", {'this': this, "settings": this.settings} );
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}
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// this is true until we verify that css has actually been applied
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this.restore_wd = true;
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if(this.lastAr.type === 'original'){
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this.setAr('reset');
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}
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else {
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this.setAr(this.lastAr.ar, this.lastAr)
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}
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}
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reset(){
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this.setStretchMode(StretchMode.NO_STRETCH);
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this.zoom.setZoom(1);
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this.resetPan();
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this.setAr('reset');
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}
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setPanMode(mode) {
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if (mode === 'enable') {
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this.canPan = true;
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} else if (mode === 'disable') {
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this.canPan = false;
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} else if (mode === 'toggle') {
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this.canPan = !this.canPan;
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}
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}
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resetPan(){
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this.pan = undefined;
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}
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zoomStep(step){
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this.zoom.zoomStep(step);
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}
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resetZoom(){
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this.zoom.setZoom(1);
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this.restore();
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}
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resetCrop(){
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this.setAr('reset');
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}
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resetStretch(){
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this.stretcher.mode = StretchMode.NO_STRETCH;
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this.restore();
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}
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// mostly internal stuff
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computeOffsets(stretchFactors){
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if (Debug.debug) {
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console.log("[Resizer::_res_computeOffsets] <rid:"+this.resizerId+"> video will be aligned to ", this.settings.active.miscFullscreenSettings.videoFloat);
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}
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var actualWidth = this.conf.video.offsetWidth * stretchFactors.xFactor;
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var actualHeight = this.conf.video.offsetHeight * stretchFactors.yFactor;
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var wdiff = actualWidth - this.conf.player.dimensions.width;
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var hdiff = actualHeight - this.conf.player.dimensions.height;
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var translate = {x: 0, y: 0};
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if (this.pan) {
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// don't offset when video is smaller than player
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if(wdiff < 0 && hdiff < 0) {
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return translate;
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}
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translate.x = wdiff * this.pan.relativeOffsetX / this.zoom.scale;
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translate.y = hdiff * this.pan.relativeOffsetY / this.zoom.scale;
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} else {
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if (this.videoFloat == "left") {
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translate.x = wdiff * 0.5;
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}
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else if (this.videoFloat == "right") {
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translate.x = wdiff * -0.5;
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}
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}
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if(Debug.debug) {
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console.log("[Resizer::_res_computeOffsets] <rid:"+this.resizerId+"> calculated offsets:", translate);
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}
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return translate;
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}
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applyCss(stretchFactors, translate){
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if (! this.video) {
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if(Debug.debug) {
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console.log("[Resizer::_res_applyCss] <rid:"+this.resizerId+"> Video went missing, doing nothing.");
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}
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this.conf.destroy();
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return;
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}
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// save stuff for quick tests (before we turn numbers into css values):
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this.currentVideoSettings = {
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validFor: this.conf.player.dimensions,
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// videoWidth: dimensions.width,
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// videoHeight: dimensions.height
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}
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var styleArrayStr = this.video.getAttribute('style');
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if (styleArrayStr) {
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var styleArray = styleArrayStr.split(";");
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for(var i in styleArray){
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styleArray[i] = styleArray[i].trim();
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if (styleArray[i].startsWith("transform:")){
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delete styleArray[i];
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}
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}
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}
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else{
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var styleArray = [];
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}
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// add remaining elements
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if(stretchFactors){
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styleArray.push(`transform: scale(${stretchFactors.xFactor}, ${stretchFactors.yFactor}) translate(${translate.x}px, ${translate.y}px)`);
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}
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// build style string back
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var styleString = "";
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for(var i in styleArray)
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if(styleArray[i])
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styleString += styleArray[i] + "; ";
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this.setStyleString(styleString);
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}
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setStyleString (styleString, count = 0) {
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this.video.setAttribute("style", styleString);
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this.currentStyleString = this.video.getAttribute('style');
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this.currentCssValidFor = this.conf.player.dimensions;
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if(this.restore_wd){
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if(! this.video){
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if(Debug.debug)
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console.log("[Resizer::_res_setStyleString] <rid:"+this.resizerId+"> Video element went missing, nothing to do here.")
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return;
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}
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// if(
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// styleString.indexOf("width: " + this.video.style.width) == -1 ||
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// styleString.indexOf("height: " + this.video.style.height) == -1) {
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// // css ni nastavljen?
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// // css not set?
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// if(Debug.debug)
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// console.log("[Resizer::_res_setStyleString] Style string not set ???");
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// if(count < settings.active.resizer.setStyleString.maxRetries){
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// setTimeout( this.setStyleString, settings.active.resizer.setStyleString.retryTimeout, count + 1);
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// }
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// else if(Debug.debug){
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// console.log("[Resizer::_res_setStyleString] we give up. css string won't be set");
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// }
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// }
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// else{
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this.restore_wd = false;
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// }
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}
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else{
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if(Debug.debug)
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console.log("[Resizer::_res_setStyleString] <rid:"+this.resizerId+"> css applied. Style string:", styleString);
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}
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}
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cssCheck(){
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// this means we haven't set our CSS yet, or that we changed video.
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// if(! this.currentCss.tranform) {
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// this.scheduleCssWatcher(200);
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// return;
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// }
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// this means video went missing. videoData will be re-initialized when the next video is found
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if(! this.video){
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if(Debug.debug) {
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console.log("[Resizer::cssCheck] <rid:"+this.resizerId+"> no video detecting, issuing destroy command");
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}
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this.conf.destroy();
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return;
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}
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if(this.destroyed) {
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if(Debug.debug) {
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console.log("[Resizer::cssCheck] <rid:"+this.resizerId+"> destroyed flag is set, we shouldnt be running");
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}
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return;
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}
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var styleString = this.video.getAttribute('style');
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// first, a quick test:
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// if (this.currentVideoSettings.validFor == this.conf.player.dimensions ){
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if (this.currentStyleString !== styleString){
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this.restore();
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this.scheduleCssWatcher(10);
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return;
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}
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if (this.cssWatcherIncreasedFrequencyCounter > 0) {
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--this.cssWatcherIncreasedFrequencyCounter;
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this.scheduleCssWatcher(20);
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} else {
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this.scheduleCssWatcher(1000);
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}
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}
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}
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