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Allow text-selection, but not copying, when enablePermissions is set (PR 16320 follow-up)

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Jonas Jenwald 2023-04-22 13:07:07 +02:00
parent 1b79b0cd21
commit 8a9d7a18cc
5 changed files with 46 additions and 33 deletions
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49
web/pdf_viewer.js
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@ -64,7 +64,6 @@ import { PDFRenderingQueue } from "./pdf_rendering_queue.js";
import { SimpleLinkService } from "./pdf_link_service.js";
const DEFAULT_CACHE_SIZE = 10;
const ENABLE_PERMISSIONS_CLASS = "enablePermissions";
const PagesCountLimit = {
FORCE_SCROLL_MODE_PAGE: 15000,
@ -206,7 +205,7 @@ class PDFViewer {
#containerTopLeft = null;
#copyCallbackBound = this.#copyCallback.bind(this);
#copyCallbackBound = null;
#enablePermissions = false;
@ -226,6 +225,8 @@ class PDFViewer {
#scaleTimeoutId = null;
#textLayerMode = TextLayerMode.ENABLE;
/**
* @param {PDFViewerOptions} options
*/
@ -259,7 +260,7 @@ class PDFViewer {
this.downloadManager = options.downloadManager || null;
this.findController = options.findController || null;
this._scriptingManager = options.scriptingManager || null;
this.textLayerMode = options.textLayerMode ?? TextLayerMode.ENABLE;
this.#textLayerMode = options.textLayerMode ?? TextLayerMode.ENABLE;
this.#annotationMode =
options.annotationMode ?? AnnotationMode.ENABLE_FORMS;
this.#annotationEditorMode =
@ -565,15 +566,6 @@ class PDFViewer {
};
}
#createHiddenCopyElement() {
if (this.#hiddenCopyElement) {
return;
}
const element = (this.#hiddenCopyElement = document.createElement("div"));
element.id = "hiddenCopyElement";
this.viewer.before(element);
}
/**
* Currently only *some* permissions are supported.
* @returns {Object}
@ -582,17 +574,17 @@ class PDFViewer {
const params = {
annotationEditorMode: this.#annotationEditorMode,
annotationMode: this.#annotationMode,
textLayerMode: this.textLayerMode,
textLayerMode: this.#textLayerMode,
};
if (!permissions) {
this.#createHiddenCopyElement();
return params;
}
if (!permissions.includes(PermissionFlag.COPY)) {
this.viewer.classList.add(ENABLE_PERMISSIONS_CLASS);
} else {
this.#createHiddenCopyElement();
if (
!permissions.includes(PermissionFlag.COPY) &&
this.#textLayerMode === TextLayerMode.ENABLE
) {
params.textLayerMode = TextLayerMode.ENABLE_PERMISSIONS;
}
if (!permissions.includes(PermissionFlag.MODIFY_CONTENTS)) {
@ -683,7 +675,7 @@ class PDFViewer {
return texts.join("\n");
}
#copyCallback(event) {
#copyCallback(textLayerMode, event) {
const selection = document.getSelection();
const { focusNode, anchorNode } = selection;
if (
@ -699,6 +691,11 @@ class PDFViewer {
// including this element so having it in the selection means that all
// has been selected.
if (textLayerMode === TextLayerMode.ENABLE_PERMISSIONS) {
event.preventDefault();
event.stopPropagation();
return;
}
// TODO: if all the pages are rendered we don't need to wait for
// getAllText and we could just get text from the Selection object.
@ -831,6 +828,13 @@ class PDFViewer {
const { annotationEditorMode, annotationMode, textLayerMode } =
this.#initializePermissions(permissions);
if (textLayerMode !== TextLayerMode.DISABLE) {
const element = (this.#hiddenCopyElement =
document.createElement("div"));
element.id = "hiddenCopyElement";
this.viewer.before(element);
}
if (annotationEditorMode !== AnnotationEditorType.DISABLE) {
const mode = annotationEditorMode;
@ -906,6 +910,10 @@ class PDFViewer {
this._scriptingManager?.setDocument(pdfDocument); // Enable scripting.
if (this.#hiddenCopyElement) {
this.#copyCallbackBound = this.#copyCallback.bind(
this,
textLayerMode
);
document.addEventListener("copy", this.#copyCallbackBound);
}
@ -1051,11 +1059,10 @@ class PDFViewer {
this._updateScrollMode();
this.viewer.removeAttribute("lang");
// Reset all PDF document permissions.
this.viewer.classList.remove(ENABLE_PERMISSIONS_CLASS);
if (this.#hiddenCopyElement) {
document.removeEventListener("copy", this.#copyCallbackBound);
this.#copyCallbackBound = null;
this.#hiddenCopyElement.remove();
this.#hiddenCopyElement = null;