add new sorting methods for file list in filemanager

Now files can be sorted by filename or last accessed time

frontend/apps/filemanager/filemanager.lua

@@ -148,6 +148,16 @@ function FileManager:toggleHiddenFiles()
     G_reader_settings:saveSetting("show_hidden", self.file_chooser.show_hidden)
 end
 
+function FileManager:setCollate(collate)
+    self.file_chooser:setCollate(collate)
+    G_reader_settings:saveSetting("collate", self.file_chooser.collate)
+end
+
+function FileManager:toggleReverseCollate()
+    self.file_chooser:toggleReverseCollate()
+    G_reader_settings:saveSetting("reverse_collate", self.file_chooser.reverse_collate)
+end
+
 function FileManager:onClose()
     DEBUG("close filemanager")
     UIManager:close(self)
@@ -222,4 +232,31 @@ function FileManager:deleteFile(file)
     util.execute("/bin/rm", "-r", util.realpath(file))
 end
 
+local collates = {
+    strcoll = _("Title"),
+    access = _("Recent"),
+}
+
+function FileManager:getSortingMenuTable()
+    local fm = self
+    local set_collate_table = function(collate)
+        return {
+            text = collates[collate],
+            checked_func = function()
+                return fm.file_chooser.collate == collate
+            end,
+            callback = function() fm:setCollate(collate) end,
+        }
+    end
+    return {
+        text_func = function()
+            return _("Sorting: ") .. collates[fm.file_chooser.collate]
+        end,
+        sub_item_table = {
+            set_collate_table("strcoll"),
+            set_collate_table("access"),
+        }
+    }
+end
+
 return FileManager

frontend/apps/filemanager/filemanagermenu.lua

@@ -96,11 +96,15 @@ function FileManagerMenu:setUpdateItemTable()
     table.insert(self.tab_item_table.setting, {
         text = _("Show hidden files"),
         checked_func = function() return self.ui.file_chooser.show_hidden end,
-        callback = function()
+        callback = function() self.ui:toggleHiddenFiles() end
-            self.ui:toggleHiddenFiles()
+    })
-        end
+    local FileManager = require("apps/filemanager/filemanager")
+    table.insert(self.tab_item_table.setting, self.ui:getSortingMenuTable())
+    table.insert(self.tab_item_table.setting, {
+        text = _("Reverse sorting"),
+        checked_func = function() return self.ui.file_chooser.reverse_collate end,
+        callback = function() self.ui:toggleReverseCollate() end
     })
-
     table.insert(self.tab_item_table.setting, {
         text = _("Start with last opened file"),
         checked_func = function() return G_reader_settings:readSetting("open_last") end,

frontend/ui/widget/filechooser.lua

@@ -25,7 +25,9 @@ local FileChooser = Menu:extend{
     show_hidden = nil,
     filter = function(filename) return true end,
     exclude_dirs = {"%.sdr$"},
-    collate = strcoll,
+    strcoll = strcoll,
+    collate = "strcoll", -- or collate = "access",
+    reverse_collate = false,
 }
 
 function FileChooser:init()
@@ -37,7 +39,7 @@ function FileChooser:init()
         return true
     end
     -- disable string collating in Kobo devices. See issue koreader/koreader#686
-    if Device:isKobo() then self.collate = nil end
+    if Device:isKobo() then self.strcoll = nil end
     self.item_table = self:genItemTableFromPath(self.path)
     Menu.init(self) -- call parent's init()
 end
@@ -52,26 +54,45 @@ function FileChooser:genItemTableFromPath(path)
         for f in iter, dir_obj do
             if self.show_hidden or not string.match(f, "^%.[^.]") then
                 local filename = self.path.."/"..f
-                local filemode = lfs.attributes(filename, "mode")
+                local attributes = lfs.attributes(filename)
-                if filemode == "directory" and f ~= "." and f~=".." then
+                if attributes.mode == "directory" and f ~= "." and f~=".." then
                     if self.dir_filter(filename) then
-                        table.insert(dirs, f)
+                        table.insert(dirs, {name = f, attr = attributes})
                     end
-                elseif filemode == "file" then
+                elseif attributes.mode == "file" then
                     if self.file_filter(filename) then
-                        table.insert(files, f)
+                        table.insert(files, {name = f, attr = attributes})
                     end
                 end
             end
         end
     end
-    table.sort(dirs, self.collate)
+
-    if path ~= "/" then table.insert(dirs, 1, "..") end
+    local sorting = nil
-    table.sort(files, self.collate)
+    local reverse = self.reverse_collate
+    if self.collate == "strcoll" then
+        sorting = self.strcoll and function(a, b)
+                return self.strcoll(a.name, b.name) == not reverse
+            end or function(a, b)
+                return (a.name < b.name) == not reverse
+            end
+    elseif self.collate == "access" then
+        sorting = function(a, b)
+            if reverse then
+                return a.attr.access < b.attr.access
+            else
+                return a.attr.access > b.attr.access
+            end
+        end
+    end
+
+    table.sort(dirs, sorting)
+    if path ~= "/" then table.insert(dirs, 1, {name = ".."}) end
+    table.sort(files, sorting)
 
     local item_table = {}
     for i, dir in ipairs(dirs) do
-        local path = self.path.."/"..dir
+        local path = self.path.."/"..dir.name
         local items = 0
         local ok, iter, dir_obj = pcall(lfs.dir, path)
         if ok then
@@ -83,13 +104,13 @@ function FileChooser:genItemTableFromPath(path)
         end
         local istr = items .. (items > 1 and _(" items") or _(" item"))
         table.insert(item_table, {
-            text = dir.."/",
+            text = dir.name.."/",
             mandatory = istr,
             path = path
         })
     end
     for _, file in ipairs(files) do
-        local full_path = self.path.."/"..file
+        local full_path = self.path.."/"..file.name
         local file_size = lfs.attributes(full_path, "size") or 0
         local sstr = ""
         if file_size > 1024*1024 then
@@ -100,7 +121,7 @@ function FileChooser:genItemTableFromPath(path)
             sstr = string.format("%d B", file_size)
         end
         table.insert(item_table, {
-            text = file,
+            text = file.name,
             mandatory = sstr,
             path = full_path
         })
@@ -133,6 +154,16 @@ function FileChooser:toggleHiddenFiles()
     self:refreshPath()
 end
 
+function FileChooser:setCollate(collate)
+    self.collate = collate
+    self:refreshPath()
+end
+
+function FileChooser:toggleReverseCollate()
+    self.reverse_collate = not self.reverse_collate
+    self:refreshPath()
+end
+
 function FileChooser:onMenuSelect(item)
     -- parent directory of dir without permission get nil mode
     -- we need to change to parent path in this case