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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/*
* Copyright (C) 2022 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
const PDFJSContentScript = {
overrideSettings() {
// Disable the findbar provided by PDF.js.
delete PDFViewerApplication.supportsIntegratedFind;
PDFViewerApplication.supportsIntegratedFind = true;
// Hide sidebar on load.
PDFViewerApplicationOptions.set("sidebarViewOnLoad", 0);
},
setPageMode({ pages, continuous }) {
const { SpreadMode, ScrollMode } = PDFViewerApplicationConstants;
PDFViewerApplication.pdfViewer.spreadMode = pages == "two" ? SpreadMode.ODD : SpreadMode.NONE;
if (continuous)
PDFViewerApplication.pdfViewer.scrollMode = ScrollMode.VERTICAL;
else
PDFViewerApplication.pdfViewer.scrollMode = ScrollMode.PAGE;
this.autoResize();
},
autoResize() {
if (PDFViewerApplication.pdfViewer.spreadMode == PDFViewerApplicationConstants.SpreadMode.ODD)
PDFViewerApplication.pdfViewer.currentScaleValue = "page-fit";
else
PDFViewerApplication.pdfViewer.currentScaleValue = "page-width";
},
open(data) {
PDFViewerApplication.open({ data });
},
init() {
PDFViewerApplication.initializedPromise.then(() => {
this.overrideSettings();
PDFViewerApplication.eventBus.on("pagesinit", () => {
this.autoResize();
});
});
window.addEventListener("message", (event) => {
const { message, data } = event.data;
switch (message) {
case "open-pdf":
this.open(data);
break;
case "context-menu-auto-size":
this.autoResize();
break;
case "context-menu-zoom-in":
PDFViewerApplication.zoomIn();
break;
case "context-menu-zoom-out":
PDFViewerApplication.zoomOut();
break;
case "context-menu-actual-size":
PDFViewerApplication.pdfViewer.currentScaleValue = "page-fit";
break;
case "context-menu-single-page":
this.setPageMode({ pages: "single", continuous: false });
break;
case "context-menu-single-page-continuous":
this.setPageMode({ pages: "single", continuous: true });
break;
case "context-menu-two-pages":
this.setPageMode({ pages: "two", continuous: false });
break;
case "context-menu-two-pages-continuous":
this.setPageMode({ pages: "two", continuous: true });
break;
case "context-menu-next-page":
PDFViewerApplication.pdfViewer.nextPage();
break;
case "context-menu-previous-page":
PDFViewerApplication.pdfViewer.previousPage();
break;
default:
console.error("Unrecognized message:", event);
break;
}
});
}
};
PDFJSContentScript.init();
|
