From a729297f6b6fb21976d81ab40956bbdbac8cd340 Mon Sep 17 00:00:00 2001
From: Abe Jellinek <jellinek@berkeley.edu>
Date: Wed, 28 Jun 2023 13:15:18 -0400
Subject: [PATCH] Add menu items to switch EPUB flow modes (paginated/scrolled)

---
 chrome/content/zotero/reader.xhtml             | 14 ++++++++++++++
 chrome/content/zotero/standalone/standalone.js |  4 ++++
 chrome/content/zotero/xpcom/reader.js          |  4 ++++
 chrome/content/zotero/zoteroPane.xhtml         | 14 ++++++++++++++
 chrome/locale/en-US/zotero/zotero.dtd          |  2 ++
 5 files changed, 38 insertions(+)

diff --git a/chrome/content/zotero/reader.xhtml b/chrome/content/zotero/reader.xhtml
index 5d8105ca5a..6980dbd19c 100644
--- a/chrome/content/zotero/reader.xhtml
+++ b/chrome/content/zotero/reader.xhtml
@@ -198,6 +198,20 @@
 					type="checkbox"
 					oncommand="reader.spreadMode = 2"
 				/>
+				<menuitem
+					id="view-menuitem-scrolled"
+					class="menu-type-reader epub"
+					type="checkbox"
+					label="&zotero.pdfReader.scrolled;"
+					oncommand="reader.flowMode = 'scrolled'"
+				/>
+				<menuitem
+					id="view-menuitem-paginated"
+					class="menu-type-reader epub"
+					type="checkbox"
+					label="&zotero.pdfReader.paginated;"
+					oncommand="reader.flowMode = 'paginated'"
+				/>
 				<menuseparator class="menu-type-reader"/>
 				<menuitem
 					id="view-menuitem-zoom-in"
diff --git a/chrome/content/zotero/standalone/standalone.js b/chrome/content/zotero/standalone/standalone.js
index 9215e59e17..6702f099f3 100644
--- a/chrome/content/zotero/standalone/standalone.js
+++ b/chrome/content/zotero/standalone/standalone.js
@@ -422,6 +422,10 @@ const ZoteroStandalone = new function() {
 				this.updateMenuItemCheckmark('view-menuitem-zoom-page-width', reader.zoomPageWidthEnabled);
 				this.updateMenuItemCheckmark('view-menuitem-zoom-page-height', reader.zoomPageHeightEnabled);
 			}
+			else if (reader.type === 'epub') {
+				this.updateMenuItemCheckmark('view-menuitem-scrolled', reader.flowMode === 'scrolled');
+				this.updateMenuItemCheckmark('view-menuitem-paginated', reader.flowMode === 'paginated');
+			}
 			this.updateMenuItemCheckmark('view-menuitem-split-vertically', reader.splitType === 'vertical');
 			this.updateMenuItemCheckmark('view-menuitem-split-horizontally', reader.splitType === 'horizontal');
 		}
diff --git a/chrome/content/zotero/xpcom/reader.js b/chrome/content/zotero/xpcom/reader.js
index 01a7d79456..a17f1da851 100644
--- a/chrome/content/zotero/xpcom/reader.js
+++ b/chrome/content/zotero/xpcom/reader.js
@@ -1074,6 +1074,10 @@ class ReaderWindow extends ReaderInstance {
 			this._window.document.getElementById('view-menuitem-zoom-page-width').setAttribute('checked', this._internalReader.zoomPageWidthEnabled);
 			this._window.document.getElementById('view-menuitem-zoom-page-height').setAttribute('checked', this._internalReader.zoomPageHeightEnabled);
 		}
+		else if (this._type === 'epub') {
+			this._window.document.getElementById('view-menuitem-scrolled').setAttribute('checked', this._internalReader.flowMode === 'scrolled');
+			this._window.document.getElementById('view-menuitem-paginated').setAttribute('checked', this._internalReader.flowMode === 'paginated');
+		}
 		this._window.document.getElementById('view-menuitem-split-vertically').setAttribute('checked', this._internalReader.splitType === 'vertical');
 		this._window.document.getElementById('view-menuitem-split-horizontally').setAttribute('checked', this._internalReader.splitType === 'horizontal');
 	}
diff --git a/chrome/content/zotero/zoteroPane.xhtml b/chrome/content/zotero/zoteroPane.xhtml
index e2a4080c3c..446885afb9 100644
--- a/chrome/content/zotero/zoteroPane.xhtml
+++ b/chrome/content/zotero/zoteroPane.xhtml
@@ -358,6 +358,20 @@
 								label="&zotero.pdfReader.evenSpreads;"
 								oncommand="ZoteroStandalone.currentReader.spreadMode = 2"
 							/>
+							<menuitem
+								id="view-menuitem-scrolled"
+								class="menu-type-reader epub"
+								type="checkbox"
+								label="&zotero.pdfReader.scrolled;"
+								oncommand="ZoteroStandalone.currentReader.flowMode = 'scrolled'"
+							/>
+							<menuitem
+								id="view-menuitem-paginated"
+								class="menu-type-reader epub"
+								type="checkbox"
+								label="&zotero.pdfReader.paginated;"
+								oncommand="ZoteroStandalone.currentReader.flowMode = 'paginated'"
+							/>
 							<menuseparator class="menu-type-reader"/>
 							<menuitem
 								id="view-menuitem-zoom-in"
diff --git a/chrome/locale/en-US/zotero/zotero.dtd b/chrome/locale/en-US/zotero/zotero.dtd
index 16d72ee748..0b677031c6 100644
--- a/chrome/locale/en-US/zotero/zotero.dtd
+++ b/chrome/locale/en-US/zotero/zotero.dtd
@@ -322,6 +322,8 @@
 <!ENTITY zotero.pdfReader.noSpreads							"No Spreads">
 <!ENTITY zotero.pdfReader.oddSpreads						"Odd Spreads">
 <!ENTITY zotero.pdfReader.evenSpreads						"Even Spreads">
+<!ENTITY zotero.pdfReader.scrolled							"Scrolled">
+<!ENTITY zotero.pdfReader.paginated							"Paginated">
 <!ENTITY zotero.pdfReader.zoomIn							"Zoom In">
 <!ENTITY zotero.pdfReader.zoomOut							"Zoom Out">
 <!ENTITY zotero.pdfReader.zoomReset							"Reset Zoom">