From 3dabbd5d73f99e7c23ae752e32a13279a0800f84 Mon Sep 17 00:00:00 2001
From: hius07 <62179190+hius07@users.noreply.github.com>
Date: Sun, 7 Nov 2021 20:29:53 +0200
Subject: [PATCH] Typeset menu: adds "Reset document settings to default"
 (#8412)

---
 frontend/apps/filemanager/filemanagerutil.lua | 26 ++++++++++++++++++-
 frontend/apps/reader/modules/readermenu.lua   | 17 ++++++++++++
 frontend/ui/elements/reader_menu_order.lua    |  3 ++-
 3 files changed, 44 insertions(+), 2 deletions(-)

diff --git a/frontend/apps/filemanager/filemanagerutil.lua b/frontend/apps/filemanager/filemanagerutil.lua
index bc0db4f84..643e950b1 100644
--- a/frontend/apps/filemanager/filemanagerutil.lua
+++ b/frontend/apps/filemanager/filemanagerutil.lua
@@ -29,7 +29,7 @@ function filemanagerutil.abbreviate(path)
     return path
 end
 
--- Purge doc settings in sidecar directory,
+-- Purge doc settings in sidecar directory
 function filemanagerutil.purgeSettings(file)
     local file_abs_path = util.realpath(file)
     if file_abs_path then
@@ -37,4 +37,28 @@ function filemanagerutil.purgeSettings(file)
     end
 end
 
+-- Purge doc settings except kept
+function filemanagerutil.resetDocumentSettings(file)
+    local settings_to_keep = {
+        bookmarks = true,
+        bookmarks_sorted = true,
+        bookmarks_version = true,
+        cre_dom_version = true,
+        highlight = true,
+        highlights_imported = true,
+        last_page = true,
+        last_xpointer = true,
+    }
+    local file_abs_path = util.realpath(file)
+    if file_abs_path then
+        local doc_settings = DocSettings:open(file_abs_path)
+        for k in pairs(doc_settings.data) do
+            if not settings_to_keep[k] then
+                doc_settings:delSetting(k)
+            end
+        end
+        doc_settings:close()
+    end
+end
+
 return filemanagerutil
diff --git a/frontend/apps/reader/modules/readermenu.lua b/frontend/apps/reader/modules/readermenu.lua
index 5510dd863..d33390371 100644
--- a/frontend/apps/reader/modules/readermenu.lua
+++ b/frontend/apps/reader/modules/readermenu.lua
@@ -176,6 +176,23 @@ function ReaderMenu:setUpdateItemTable()
     end
 
     -- typeset tab
+    self.menu_items.reset_document_settings = {
+        text = _("Reset document settings to default"),
+        keep_menu_open = true,
+        callback = function()
+            UIManager:show(ConfirmBox:new{
+                text = _("Reset current document settings to their default values?\n\nReading position, highlights and bookmarks will be kept.\nThe document will be reloaded."),
+                ok_text = _("Reset"),
+                ok_callback = function()
+                    local current_file = self.ui.document.file
+                    self:onTapCloseMenu()
+                    self.ui:onClose()
+                    require("apps/filemanager/filemanagerutil").resetDocumentSettings(current_file)
+                    require("apps/reader/readerui"):showReader(current_file)
+                end,
+            })
+        end,
+    }
     self.menu_items.page_overlap = require("ui/elements/page_overlap")
 
     -- settings tab
diff --git a/frontend/ui/elements/reader_menu_order.lua b/frontend/ui/elements/reader_menu_order.lua
index 597f76e50..58bff2f83 100644
--- a/frontend/ui/elements/reader_menu_order.lua
+++ b/frontend/ui/elements/reader_menu_order.lua
@@ -38,12 +38,13 @@ local order = {
         "bookmarks_settings",
     },
     typeset = {
+        "reset_document_settings",
+        "----------------------------",
         "set_render_style",
         "style_tweaks",
         "----------------------------",
         "change_font",
         "typography",
-        "floating_punctuation",
         "----------------------------",
         "switch_zoom_mode",
         "----------------------------",