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Add protected option to text selection plugin #1142

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Add protected option to text selection plugin #1142

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25 changes: 24 additions & 1 deletion src/plugins/plugin.text_selection.js
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,8 @@ export const DEFAULT_OPTIONS = {
singlePageDjvuXmlUrl: null,
/** Whether to fetch the XML as a jsonp */
jsonp: false,
/** Whether the book is a protected book */
protected: false,
};
/** @typedef {typeof DEFAULT_OPTIONS} TextSelectionPluginOptions */

Expand Down Expand Up @@ -82,6 +84,22 @@ export class TextSelectionPlugin {
init() {
this.selectionObserver.attach();

if (this.options.protected) {
// Prevent right clicking when selected text
$(document.body).on('contextmenu dragstart copy', (e) => {
const selection = document.getSelection();
if (selection && selection.toString()) {
const intersectsTextLayer = $('.textSelectionSVG')
.toArray()
.some(el => selection.containsNode(el, true));
if (intersectsTextLayer) {
e.preventDefault();
return false;
}
}
});
}

// Only fetch the full djvu xml if the single page url isn't there
if (this.options.singlePageDjvuXmlUrl) return;
this.djvuPagesPromise = $.ajax({
Expand Down Expand Up @@ -137,6 +155,10 @@ export class TextSelectionPlugin {
*/
interceptCopy($container) {
$container[0].addEventListener('copy', (event) => {
if (this.options.protected) {
event.preventDefault();
return false;
}
const selection = document.getSelection();
event.clipboardData.setData('text/plain', selection.toString());
event.preventDefault();
Expand Down Expand Up @@ -406,7 +428,8 @@ export class TextSelectionPlugin {

export class BookreaderWithTextSelection extends BookReader {
init() {
const options = Object.assign({}, DEFAULT_OPTIONS, this.options.plugins.textSelection);
const inheritedOptions = 'protected' in this.options ? { protected: this.options.protected } : {};
const options = Object.assign({}, DEFAULT_OPTIONS, inheritedOptions, this.options.plugins.textSelection);
if (options.enabled) {
this.textSelectionPlugin = new TextSelectionPlugin(options, this.options.vars, this.pageProgression);
// Write this back; this way the plugin is the source of truth, and BR just
Expand Down