History: show last read date instead of file size

In classic and list display modes.

frontend/docsettings.lua

@@ -83,6 +83,13 @@ function DocSettings:getNameFromHistory(hist_name)
     return string.sub(hist_name, string.len(s)+2, -5)
 end
 
+function DocSettings:getLastSaveTime(doc_path)
+    local attr = lfs.attributes(self:getSidecarFile(doc_path))
+    if attr and attr.mode == "file" then
+        return attr.modification
+    end
+end
+
 function DocSettings:ensureSidecar(sidecar)
     if lfs.attributes(sidecar, "mode") ~= "directory" then
         lfs.mkdir(sidecar)

frontend/readhistory.lua

@@ -2,7 +2,7 @@ local DataStorage = require("datastorage")
 local DocSettings = require("docsettings")
 local dump = require("dump")
 local ffiutil = require("ffi/util")
-local getFriendlySize = require("util").getFriendlySize
+local util = require("util")
 local joinPath = ffiutil.joinPath
 local lfs = require("libs/libkoreader-lfs")
 local realpath = ffiutil.realpath
@@ -15,13 +15,30 @@ local ReadHistory = {
 }
 
 local function buildEntry(input_time, input_file)
-    local file_exists = lfs.attributes(input_file, "mode") == "file"
+    local file_path = realpath(input_file) or input_file -- keep orig file path of deleted files
+    local file_exists = lfs.attributes(file_path, "mode") == "file"
     return {
         time = input_time,
         text = input_file:gsub(".*/", ""),
-        file = realpath(input_file) or input_file, -- keep orig file path of deleted files
+        file = file_path,
         dim = not file_exists, -- "dim", as expected by Menu
-        mandatory = file_exists and getFriendlySize(lfs.attributes(input_file, "size") or 0),
+        -- mandatory = file_exists and require("util").getFriendlySize(lfs.attributes(input_file, "size") or 0),
+        mandatory_func = function() -- Show the last read time (rather than file size)
+            local readerui_instance = require("apps/reader/readerui"):_getRunningInstance()
+            local currently_opened_file = readerui_instance and readerui_instance.document.file
+            local last_read_ts
+            if file_path == currently_opened_file then
+                -- Don't use the sidecar file date which is updated regularly while
+                -- reading: keep showing the opening time for the current document.
+                last_read_ts = input_time
+            else
+                -- For past documents, the last save time of the settings is better
+                -- as last read time than input_time (its last opening time, that
+                -- we fallback to it no sidecar file)
+                last_read_ts = DocSettings:getLastSaveTime(file_path) or input_time
+            end
+            return util.secondsToDate(last_read_ts, G_reader_settings:nilOrTrue("twelve_hour_clock"))
+        end,
         callback = function()
             local ReaderUI = require("apps/reader/readerui")
             ReaderUI:showReader(input_file)

frontend/ui/widget/menu.lua

@@ -236,12 +236,13 @@ function MenuItem:init()
     -- Padding before mandatory
     local text_mandatory_padding = 0
     local text_ellipsis_mandatory_padding = 0
-    if self.mandatory then
+    local mandatory = self.mandatory_func and self.mandatory_func() or self.mandatory
+    if mandatory then
         text_mandatory_padding = Size.span.horizontal_default
         -- Smaller padding when ellipsis for better visual feeling
         text_ellipsis_mandatory_padding = Size.span.horizontal_small
     end
-    local mandatory = self.mandatory and ""..self.mandatory or ""
+    mandatory = mandatory and ""..mandatory or ""
     local mandatory_widget = TextWidget:new{
         text = mandatory,
         face = self.info_face,
@@ -1014,6 +1015,7 @@ function Menu:updateItems(select_number)
                 text = Menu.getMenuText(self.item_table[i]),
                 bidi_wrap_func = self.item_table[i].bidi_wrap_func,
                 mandatory = self.item_table[i].mandatory,
+                mandatory_func = self.item_table[i].mandatory_func,
                 bold = self.item_table.current == i or self.item_table[i].bold == true,
                 dim = self.item_table[i].dim,
                 font = "smallinfofont",

plugins/coverbrowser.koplugin/listmenu.lua

@@ -224,7 +224,7 @@ function ListMenuItem:update()
         self.is_directory = true
         -- nb items on the right, directory name on the left
         local wright = TextWidget:new{
-            text = self.mandatory,
+            text = self.mandatory_func and self.mandatory_func() or self.mandatory,
             face = Font:getFace("infont", math.min(max_fontsize_fileinfo, _fontSize(15))),
         }
         local pad_width = Screen:scaleBySize(10) -- on the left, in between, and on the right
@@ -357,15 +357,23 @@ function ListMenuItem:update()
             --   pages read / nb of pages (not available for crengine doc not opened)
             local directory, filename = util.splitFilePathName(self.filepath) -- luacheck: no unused
             local filename_without_suffix, filetype = util.splitFileNameSuffix(filename)
-            local fileinfo_str = filetype
-            if self.mandatory then
-                fileinfo_str = self.mandatory .. "  " .. BD.wrap(fileinfo_str)
-            end
-            if bookinfo._no_provider then
-                -- for unspported files: don't show extension on the right,
-                -- keep it in filename
-                filename_without_suffix = filename
-                fileinfo_str = self.mandatory
+            local fileinfo_str
+            if self.mandatory_func then
+                -- Currently only provided by History, giving the last time read.
+                -- Just show this date, without the file extension
+                fileinfo_str = self.mandatory_func()
+            else
+                if self.mandatory then
+                    fileinfo_str = BD.wrap(self.mandatory) .. "  " .. BD.wrap(filetype)
+                else
+                    fileinfo_str = filetype
+                end
+                if bookinfo._no_provider then
+                    -- for unspported files: don't show extension on the right,
+                    -- keep it in filename
+                    filename_without_suffix = filename
+                    fileinfo_str = self.mandatory
+                end
             end
             -- Current page / pages are available or more accurate in .sdr/metadata.lua
             -- We use a cache (cleaned at end of this browsing session) to store
@@ -949,6 +957,7 @@ function ListMenu:_updateItemsBuildUI()
                 text = getMenuText(entry),
                 show_parent = self.show_parent,
                 mandatory = entry.mandatory,
+                mandatory_func = entry.mandatory_func,
                 dimen = self.item_dimen:new(),
                 shortcut = item_shortcut,
                 shortcut_style = shortcut_style,