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invertPDFButton.sys.mjs
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// ==UserScript==
// @name Invert PDF Button
// @version 1.1.2
// @author aminomancer
// @homepageURL https://github.com/aminomancer/uc.css.js
// @description Add a new button to Firefox's PDF.js viewer toolbar. It inverts the PDF colors to provide a dark mode.
// @downloadURL https://cdn.jsdelivr.net/gh/aminomancer/uc.css.js@master/JS/invertPDFButton.sys.mjs
// @updateURL https://cdn.jsdelivr.net/gh/aminomancer/uc.css.js@master/JS/invertPDFButton.sys.mjs
// @license This Source Code Form is subject to the terms of the Creative Commons Attribution-NonCommercial-ShareAlike International License, v. 4.0. If a copy of the CC BY-NC-SA 4.0 was not distributed with this file, You can obtain one at http://creativecommons.org/licenses/by-nc-sa/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
// @backgroundmodule
// ==/UserScript==
export class InvertPDFButtonChild extends JSWindowActorChild {
static config = {
filter: "invert(98%) hue-rotate(176.4deg)",
icons: {
invert:
'data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16" fill="context-fill" fill-opacity="context-fill-opacity"><path d="M7.996,2.01v11.86c-2.766,0-5.015-2.198-5.015-4.906c0-1.303,0.518-2.532,1.463-3.46L7.996,2.01 M3.274,4.309L3.274,4.309C2.061,5.504,1.31,7.151,1.31,8.964c0,3.635,2.993,6.577,6.687,6.577s6.687-2.942,6.687-6.578c0-1.813-0.752-3.46-1.964-4.655l0,0l-4.137-4.07c-0.326-0.318-0.844-0.318-1.17,0L3.274,4.309z" /></svg>',
uninvert:
'data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16" width="16" height="16" fill="context-fill" fill-opacity="context-fill-opacity"><path d="M15.227,14.594L9.212,8.58L7.996,7.363v0.001L5.297,4.664l0.001-0.001L4.116,3.48L4.114,3.482L1.938,1.305c-0.322-0.322-0.842-0.322-1.164,0s-0.322,0.842,0,1.164l2.182,2.183C1.934,5.811,1.31,7.318,1.31,8.964c0,3.635,2.993,6.577,6.687,6.577c1.639,0,3.133-0.585,4.294-1.548l1.764,1.765c0.322,0.322,0.842,0.322,1.164,0C15.549,15.437,15.549,14.916,15.227,14.594z M7.996,13.87c-2.766,0-5.015-2.198-5.015-4.906c0-1.152,0.425-2.234,1.172-3.113l3.843,3.845V13.87z M5.29,2.325l2.121-2.087c0.326-0.318,0.844-0.318,1.17,0l4.137,4.07c1.212,1.196,1.964,2.842,1.964,4.656c0,0.818-0.158,1.597-0.435,2.319L7.996,5.031V2.01L6.473,3.508L5.29,2.325z" /></svg>',
},
// Highlight colors are inverted along with everything else, which doesn't
// look good with all colors. So we change them to colors that look better
// under the filter. PDF.js still uses the default colors when not inverted.
highlightColors: {
yellow: "hsl(64, 70%, 50%)",
green: "hsl(156.6, 100%, 66.3%)",
blue: "hsl(189.4, 100%, 75.1%)",
pink: "hsl(300, 70%, 85%)",
red: "hsl(350, 80%, 85%)",
},
l10n: {
invert: "Invert PDF",
uninvert: "Uninvert PDF",
},
};
handleEvent(event) {
if (this.document?.nodePrincipal.originNoSuffix !== "resource://pdf.js") {
return;
}
this.setup();
}
setup() {
let container = this.document.getElementById("toolbarViewerRight");
if (container && !this.document.getElementById("editorInvert")) {
this.addButton(container);
}
let inverted = Services.prefs.getBoolPref(
"userChrome.invertPDFButton.inverted",
false
);
this.filter = Services.prefs.getStringPref(
"userChrome.invertPDFButton.filter",
InvertPDFButtonChild.config.filter
);
if (inverted) {
this.invertPDF();
} else {
this.uninvertPDF();
}
this.addStyles();
}
addButton(container) {
let separator = this.document.createElement("div");
separator.className = "verticalToolbarSeparator";
separator.id = "editorInvertSeparator";
container.prepend(separator);
let button = this.document.createElement("button");
button.id = "editorInvert";
button.className = "toolbarButton";
const { invert: label } = InvertPDFButtonChild.config.l10n;
button.title = label;
button.onclick = () => {
if (this.document.documentElement.dataset.inverted) {
this.uninvertPDF();
this.sendAsyncMessage("UninvertPDF");
} else {
this.invertPDF();
this.sendAsyncMessage("InvertPDF");
}
};
let altText = this.document.createElement("span");
altText.textContent = label;
button.appendChild(altText);
container.prepend(button);
}
addStyles() {
if (!this.document.getElementById("editorInvertStyles")) {
const {
icons: { invert, uninvert },
highlightColors,
} = InvertPDFButtonChild.config;
let stylesheet = this.document.createElement("style");
stylesheet.id = "editorInvertStyles";
stylesheet.textContent = /* css */ `#editorInvert::before {
mask-image: url('${invert}');
}
:root[data-inverted] {
#editorInvert::before {
mask-image: url('${uninvert}');
}
.pdfViewer,
#thumbnailView .thumbnailImage,
.editToolbar,
.freeTextEditor,
.inkEditorCanvas {
filter: ${this.filter};
}
.highlight {
&[fill="#FFFF98"] {
fill: ${highlightColors.yellow};
}
&[fill="#53FFBC"] {
fill: ${highlightColors.green};
}
&[fill="#80EBFF"] {
fill: ${highlightColors.blue};
}
&[fill="#FFCBE6"] {
fill: ${highlightColors.pink};
}
&[fill="#FF4F5F"] {
fill: ${highlightColors.red};
}
}
.annotationEditorLayer :is(.freeTextEditor, .inkEditor, .stampEditor) {
&.selectedEditor::before,
& > .resizers {
filter: ${this.filter};
}
}
}`;
this.document.head.appendChild(stylesheet);
}
}
invertPDF() {
this.document.documentElement.dataset.inverted = true;
let button = this.document.getElementById("editorInvert");
if (button) {
const { uninvert } = InvertPDFButtonChild.config.l10n;
button.title = uninvert;
button.querySelector("span").textContent = uninvert;
}
}
uninvertPDF() {
delete this.document.documentElement.dataset.inverted;
let button = this.document.getElementById("editorInvert");
if (button) {
const { invert } = InvertPDFButtonChild.config.l10n;
button.title = invert;
button.querySelector("span").textContent = invert;
}
}
}
export class InvertPDFButtonParent extends JSWindowActorParent {
async receiveMessage({ name } = {}) {
switch (name) {
case "InvertPDF":
Services.prefs.setBoolPref("userChrome.invertPDFButton.inverted", true);
break;
case "UninvertPDF":
Services.prefs.clearUserPref("userChrome.invertPDFButton.inverted");
break;
}
}
}
if (Services.appinfo.processType === Services.appinfo.PROCESS_TYPE_DEFAULT) {
Services.prefs
.getDefaultBranch("")
.setBoolPref("userChrome.invertPDFButton.inverted", false);
Services.prefs
.getDefaultBranch("")
.setStringPref(
"userChrome.invertPDFButton.filter",
InvertPDFButtonChild.config.filter
);
let esModuleURI = import.meta.url;
ChromeUtils.registerWindowActor("InvertPDFButton", {
child: { esModuleURI, events: { DOMContentLoaded: {} } },
parent: { esModuleURI },
allFrames: true,
messageManagerGroups: ["browsers"],
});
}