https://restobarmajestique.com/wp-content/plugins/pdf-viewer-for-wordpress/web/pdf-turn/pdf-turn.js?ver=12.6.4

1  /********************************************************/
2 /**     HERE MAIN MODIFIED PART FOR turnjs SUPPORT     **/
3/********************************************************/
4/// requires jQuery and turnjs
5/// all code added in viewer.js (from pdfjs build) in order to support 
6/// flipbook is commented with 'jQueryFB:' string to allow to find it easilly 
7
8var bookFlip = {
9	_width: [],		//flipbook pages width
10	_height: [],	//flipbook pages height
11	active: false,	//flipbook mode on
12	_spreadBk: NaN,	//spread mode backup to restore
13	_evSpread: null,//spread mode changed default event handler 
14	_spread: NaN,	//spread page mode
15	toStart: false,	//PDFjs require flipbook at start
16	_intoView: null,//link handler default function
17	_visPages: null,//visible pages function
18	_ready: false,	//ready to start flipbook
19
20	// event listeners when bookFlip need different handling 
21	init: function(){
22		jQuery(document).on('rotationchanging', () => {this.rotate()});
23		jQuery(document).on('scalechanging', () => {this.resize()});
24		jQuery(document).on('pagechanging', () => {this.flip()});
25		//jQuery(document).on('pagenumberchanged', () => {this.flip()});
26		
27		jQuery(document).on('documentinit', () => {
28			this.stop();
29			this._ready = false;
30		});
31
32		jQuery(document).on('scrollmodechanged', () => {
33			var scroll = PDFViewerApplication.pdfViewer.scrollMode;
34			if (scroll === 3)this.start();
35			else this.stop();
36			var button = PDFViewerApplication.appConfig.secondaryToolbar.bookFlipButton;
37			button.classList.toggle('toggled', scroll === 3);
38		});
39
40		jQuery(document).on('presentationmodechanged', () => {
41			var new_pres_mode = PDFViewerApplication.pdfViewer.presentationModeState;
42
43			if( new_pres_mode == 2){
44				this.spread(0);
45				PDFViewerApplication.eventBus.dispatch('spreadmodechanged', {
46					source: PDFViewerApplication,
47					mode: 0
48				});
49			} else if( new_pres_mode == 1 ) {
50				this.spread(tnc_spread_default);
51				PDFViewerApplication.eventBus.dispatch('spreadmodechanged', {
52					source: PDFViewerApplication,
53					mode: tnc_spread_default
54				});
55			}
56		});
57		
58		jQuery(document).on('switchspreadmode', (evt) => {
59			this.spread(evt.originalEvent.detail.mode);
60			PDFViewerApplication.eventBus.dispatch('spreadmodechanged', {
61				source: PDFViewerApplication,
62				mode: evt.originalEvent.detail.mode
63			});
64		});
65		
66		jQuery(document).on('pagesloaded', () => {
67			this._ready = true;
68			if(this.toStart){
69				this.toStart = false;

70				PDFViewerApplication.pdfViewer.scrollMode = 3;
71			}
72		});
73
74		jQuery(document).on('baseviewerinit', () => {
75
76			PDFViewerApplicationOptions.set('scrollModeOnLoad',3);
77				
78			this._intoView = PDFViewerApplication.pdfViewer.scrollPageIntoView;
79			this._visPages = PDFViewerApplication.pdfViewer._getVisiblePages;
80		});
81	},
82	// startup flipbook
83	start: function(){
84		if(this.active || !this._ready)return;
85		this.active = true;
86		
87		var viewer = PDFViewerApplication.pdfViewer;
88		
89		jQuery('.scrollModeButtons').removeClass('toggled');
90		jQuery("#pvfw-next-page").hide();
91		jQuery("#pvfw-previous-page").hide();
92		jQuery("#pvfw-flip-next-page").show();
93		jQuery("#pvfw-flip-previous-page").show();
94		
95		this._spreadBk = tnc_spread_default;
96		// this._spreadBk = viewer.spreadMode;
97		var selected = jQuery('.spreadModeButtons.toggled').attr('id');
98		// this._spread = (this._spreadBk !== 2) ? 0 : 2;
99		this._spread = this._spreadBk;
100		viewer.spreadMode = 0;
101		viewer._spreadMode = -1;
102		jQuery('.spreadModeButtons').removeClass('toggled');
103		jQuery('#' + selected).addClass('toggled');	
104		
105		this._evSpread = PDFViewerApplication.eventBus._listeners.switchspreadmode;
106		PDFViewerApplication.eventBus._listeners.switchspreadmode = null;
107		
108		viewer.scrollPageIntoView = (data) => {return this.link(data)};
109		viewer._getVisiblePages = () => {return this.load()};
110		
111		var scale = viewer.currentScale;
112		
113		var parent = this;
114		jQuery('#viewer .page').each(function(){
115			// Hard
116			jQuery(this).addClass(tnc_flip_type);
117			parent._width[jQuery(this).attr('data-page-number')] = jQuery(this).width() / scale;
118			parent._height[jQuery(this).attr('data-page-number')] = jQuery(this).height() / scale;
119		});
120		
121		jQuery('#viewer').removeClass('pdfViewer').addClass('bookViewer').css({ opacity: 1 });;
122		
123		// jQuery('#spreadOdd').prop('disabled', true);
124		// var pages = PDFViewerApplication.pagesCount;
125		// for(var page = 3; page < pages + (pages%2); page ++){
126		// 	if(this._height[page]!=this._height[page-1] || this._width[page]!=this._width[page-1]){
127		// 		jQuery('#spreadEven').prop('disabled', true);
128		// 		this._spread = 0;
129		// 	}
130		// }
131		if(window.location.hash) {
132			var hash = window.location.hash.substr(1);
133
134			var hash_param = hash.split('&').reduce(function (res, item) {
135				var parts = item.split('=');
136				res[parts[0]] = parts[1];
137				return res;
138			}, {});
139			if( hash_param.page ){
140				page_to_open = hash_param.page;
141			} else {
142				page_to_open = PDFViewerApplication.page;
143			}
144		} else {
145			page_to_open = PDFViewerApplication.page;
146		}
147		jQuery('#viewer').turn({
148			elevation: 50,
149			width:  this._size(PDFViewerApplication.page,'width') * this._spreadMult(),
150			height: this._size(PDFViewerApplication.page,'height'),
151			//duration
152			duration:tnc_page_turning_speed,
153			page: page_to_open,
154			when: {
155					turning: function(event, page, view) {  
156					var audio = document.getElementById("audio");
157					var $btn = jQuery('#pvfw-sound-on-off');
158
159					if ($btn.hasClass('enable')) {
160						audio.currentTime = 0; // Reset audio to beginning
161						audio.play().catch(function(err) {
162							console.warn('Audio play error:', err);
163						});
164					}
165      			  },
166				turned: function(event, page) {
167						var numPages = PDFViewerApplication.pagesCount;
168						if((page > numPages) || (page < 1)){
169							return;
170						}
171						PDFViewerApplication.page = page;
172					//PDFViewerApplication.page = page;
173					viewer.update();
174				},
175			},
176			display: this._spreadType()
177		});
178		this.resize();
179	},
180	// shutdown flipbook
181	stop: function(){
182		if(!this.active)return;
183		this.active = false;
184		
185		var viewer = PDFViewerApplication.pdfViewer;
186		
187		jQuery('#viewer').turn('destroy');
188		
189		viewer.scrollPageIntoView = this._intoView;
190		viewer._getVisiblePages = this._visPages;
191		
192		PDFViewerApplication.eventBus._listeners.switchspreadmode = this._evSpread;
193		viewer.spreadMode = this._spreadBk;
194
195		jQuery("#pvfw-next-page").show();
196		jQuery("#pvfw-previous-page").show();
197		jQuery("#pvfw-flip-next-page").hide();
198		jQuery("#pvfw-flip-previous-page").hide();
199		
200		jQuery('#viewer .page').removeAttr('style');
201		jQuery('#viewer').removeAttr('style').removeClass('shadow bookViewer').addClass('pdfViewer');
202		

203		var parent = this;
204		jQuery('#viewer .page').each(function(){
205			var page = jQuery(this).attr('data-page-number');
206			jQuery(this).css( 'width', parent._size(page,'width')).css( 'height', parent._size(page,'height'));
207		});
208		
209	},
210	// resize flipbook pages
211	resize: function(){
212		if(!this.active)return;
213		var viewer = PDFViewerApplication.pdfViewer;
214
215		var page = PDFViewerApplication.page;
216		var page_width 	= this._size(page,'width') * this._spreadMult();
217		var page_height = this._size(page,'height');
218		var window_width = window.innerWidth;
219		var window_height = window.innerHeight;
220		var viewerHeight = document.getElementById("viewerContainer").offsetHeight;
221
222		var scale  = viewer.currentScale;
223
224		var pageWidthScale = parseFloat((window_width - 35 ) / page_width * scale);
225		var pageHeightScale = parseFloat(( viewerHeight ) / page_height * scale);
226		var flip_scale_max = Math.max(pageWidthScale, pageHeightScale);
227		var flip_scale_min = Math.min(pageWidthScale, pageHeightScale);
228
229		if( window.innerWidth < 600 ){
230			if( viewer.currentScale < flip_scale_min){
231				viewer.currentScale = flip_scale_min;
232			}
233		} else {
234			let tncPvfwScaleSelectValue = jQuery('#scaleSelect').val();
235			let tncPvfwScaleAllValue = [ 'page-fit' ];
236			if (jQuery.inArray(tncPvfwScaleSelectValue, tncPvfwScaleAllValue) !== -1 ) {
237				viewer.currentScale = flip_scale_min;
238			} else {
239				viewer.currentScale = scale;
240			}
241		}
242
243
244		var page_width 	= this._size(page,'width') * this._spreadMult();
245		var page_height = this._size(page,'height');
246
247		jQuery('#viewer').turn('size', page_width, page_height);
248	},
249	// rotate flipbook pages
250	rotate: function(){
251		if(!this.active)return;
252		[this._height, this._width] = [this._width, this._height];
253		this.resize();
254	},
255	// change flipbook spread mode
256	spread: function(spreadMode){
257		if(!this.active)return;
258		this._spread = spreadMode;
259		var viewer = PDFViewerApplication.pdfViewer;
260		jQuery('#viewer').turn('display', this._spreadType());
261		this.resize();
262	},
263	// turn page
264	flip: function(){
265		if(!this.active)return;
266		var $viewer = jQuery('#viewer');
267		$viewer.turn('page', PDFViewerApplication.page);
268		if(!PDFViewerApplication.pdfViewer.hasEqualPageSizes){
269			// turn('size') inside resize() stops the running flip animation, so
270			// 'turned' never fires and the new pages never render. Resize after.
271			if($viewer.turn('animating')) $viewer.one('turned', () => this.resize());
272			else this.resize();
273		}
274	},
275	// follow internal links
276	link: function(data){
277		if(!this.active)return;
278		PDFViewerApplication.page = data.pageNumber;
279	},
280	// load pages near shown page
281	load: function(){
282		if(!this.active)return;
283		var views = PDFViewerApplication.pdfViewer._pages;
284		var arr = [];
285		var page = PDFViewerApplication.page;
286		var min = Math.max(page - ((this._spread === 0) ? 2 : 3 + (page%2)), 0);
287		var max = Math.min(page + ((this._spread === 0) ? 1 : 3 - (page%2)), views.length);
288		for (var i = min, ii = max; i < ii; i++) 
289		{
290			arr.push({
291				id: views[i].id,
292				view: views[i],
293				x: 0, y: 0, percent: 100
294			});
295		}
296
297		let t= { first:arr[page - min - 1], last:arr[arr.length-1], views:arr };
298		return t;
299	},
300	_spreadType: function(){
301		if( tnc_same_mobile_spread == '1' ){
302			return (this._spread === 0) ? 'single' : 'double';
303		} else {
304			if(window.innerWidth < 600){
305				return 'single';
306			} else {
307				return (this._spread === 0) ? 'single' : 'double';
308			}
309		}
310	},
311	_spreadMult: function(){
312		if( tnc_same_mobile_spread == '1' ){
313			return (this._spread === 0) ? 1 : 2;
314		} else {
315			if(window.innerWidth < 600){
316				return 1;
317			} else {
318				return (this._spread === 0) ? 1 : 2;
319			}
320		}
321	},
322	_size: function(page,request){
323		var size;
324		if (request === 'width') size = this._width[page];
325		if (request === 'height') size = this._height[page];
326		return size * PDFViewerApplication.pdfViewer.currentScale;
327	}
328};
329
330bookFlip.init();