blob: 97a9244c06fb4d591763d576d63271c494f13594 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/*
* presentation.js
* Part of Pointless Viewer, a Beamer presentation viewer
* Copyright 2018 Pacien TRAN-GIRARD
* License: GNU GPL v3
*/
"use strict";
class Presentation {
constructor(pdf) {
this.pdf = pdf;
this.currentPageIndex = 1;
this.stage = this._setupStage();
}
_setupStage() {
const self = this;
const onStageReadyCallback = function() { self._onStageReady(); };
const onNextCallback = function() { self._onNext(); };
const onPreviousCallback = function() { self._onPrevious(); };
return new Stage(onStageReadyCallback, onNextCallback, onPreviousCallback);
}
_onStageReady() {
this._setPage(this.currentPageIndex);
}
_onNext() {
if (this.currentPageIndex === this.pdf.numPages) return;
this._setPage(this.currentPageIndex + 1);
}
_onPrevious() {
if (this.currentPageIndex === 1) return;
this._setPage(this.currentPageIndex - 1);
}
_setPage(pageIndex) {
const self = this;
this.currentPageIndex = pageIndex;
this.pdf.getPage(this.currentPageIndex).then(function(page) {
self.stage.setPage(page);
})
}
}
|