More sorting orders in file manager (#2535)

frontend/apps/filemanager/filemanager.lua

@@ -475,8 +475,12 @@ end
 function FileManager:getSortingMenuTable()
     local fm = self
     local collates = {
-        strcoll = {_("by title"), _("Sort by title")},
-        access = {_("by date"), _("Sort by date")},
+        strcoll = {_("title"), _("Sort by title")},
+        access = {_("date read"), _("Sort by date of last read")},
+        change = {_("date added"), _("Sort by date of adding")},
+        modification = {_("date modified"), _("Sort by date of modification")},
+        size = {_("size"), _("Sort by size")},
+        type = {_("type"), _("Sort by type")},
     }
     local set_collate_table = function(collate)
         return {
@@ -490,13 +494,17 @@ function FileManager:getSortingMenuTable()
     return {
         text_func = function()
             return util.template(
-                _("Sort order: %1"),
+                _("Sort by %1"),
                 collates[fm.file_chooser.collate][1]
             )
         end,
         sub_item_table = {
             set_collate_table("strcoll"),
             set_collate_table("access"),
+            set_collate_table("change"),
+            set_collate_table("modification"),
+            set_collate_table("size"),
+            set_collate_table("type"),
         }
     }
 end

frontend/ui/widget/filechooser.lua

@@ -7,6 +7,7 @@ local DocSettings = require("docsettings")
 local util = require("ffi/util")
 local _ = require("gettext")
 local ffi = require("ffi")
+local getFileNameSuffix = require("util").getFileNameSuffix
 ffi.cdef[[
 int strcoll (const char *str1, const char *str2);
 ]]
@@ -16,13 +17,16 @@ local function strcoll(str1, str2)
     return ffi.C.strcoll(str1, str2) < 0
 end
 
+local function kobostrcoll(str1, str2)
+    return str1 < str2
+end
+
 local FileChooser = Menu:extend{
     no_title = true,
     path = lfs.currentdir(),
     parent = nil,
     show_hidden = nil,
     exclude_dirs = {"%.sdr$"},
-    strcoll = strcoll,
     collate = "strcoll", -- or collate = "access",
     reverse_collate = false,
     path_items = {}, -- store last browsed location(item index) for each path
@@ -48,11 +52,17 @@ function FileChooser:init()
                     if attributes ~= nil then
                         if attributes.mode == "directory" and f ~= "." and f~=".." then
                             if self.dir_filter(filename) then
-                                table.insert(dirs, {name = f, attr = attributes})
+                                table.insert(dirs, {name = f,
+                                                    suffix = getFileNameSuffix(f),
+                                                    fullpath = filename,
+                                                    attr = attributes})
                             end
                         elseif attributes.mode == "file" then
                             if self.file_filter == nil or self.file_filter(filename) then
-                                table.insert(files, {name = f, attr = attributes})
+                                table.insert(files, {name = f,
+                                                     suffix = getFileNameSuffix(f),
+                                                     fullpath = filename,
+                                                     attr = attributes})
                             end
                         end
                     end
@@ -61,9 +71,23 @@ function FileChooser:init()
         end
     end
 
+    local strcoll_func = strcoll
     -- circumvent string collating in Kobo devices. See issue koreader/koreader#686
     if Device:isKobo() then
-        self.strcoll = function(a, b) return a < b end
+        strcoll_func = kobostrcoll
+    end
+    self.strcoll = function(a, b)
+        if a == nil and b == nil then
+            return false
+        elseif a == nil then
+            return true
+        elseif b == nil then
+            return false
+        elseif DALPHA_SORT_CASE_INSENSITIVE then
+            return strcoll_func(string.lower(a), string.lower(b))
+        else
+            return strcoll_func(a, b)
+        end
     end
     self.item_table = self:genItemTableFromPath(self.path)
     Menu.init(self) -- call parent's init()
@@ -75,26 +99,56 @@ function FileChooser:genItemTableFromPath(path)
 
     self.list(path, dirs, files)
 
-    local sorting = nil
-    local reverse = self.reverse_collate
+    local sorting
     if self.collate == "strcoll" then
-        if DALPHA_SORT_CASE_INSENSITIVE then
-            sorting = function(a, b)
-                return self.strcoll(string.lower(a.name), string.lower(b.name)) == not reverse
+        sorting = function(a, b)
+            return self.strcoll(a.name, b.name)
+        end
+    elseif self.collate == "access" then
+        sorting = function(a, b)
+            if DocSettings:hasSidecarFile(a.fullpath) and not DocSettings:hasSidecarFile(b.fullpath) then
+                return true
             end
-        else
-            sorting = function(a, b)
-                return self.strcoll(a.name, b.name) == not reverse
+            if not DocSettings:hasSidecarFile(a.fullpath) and DocSettings:hasSidecarFile(b.fullpath) then
+                return false
             end
+            return a.attr.access > b.attr.access
         end
-    elseif self.collate == "access" then
+    elseif self.collate == "modification" then
+        sorting = function(a, b)
+            return a.attr.modification > b.attr.modification
+        end
+    elseif self.collate == "change" then
+        sorting = function(a, b)
+            if DocSettings:hasSidecarFile(a.fullpath) and not DocSettings:hasSidecarFile(b.fullpath) then
+                return false
+            end
+            if not DocSettings:hasSidecarFile(a.fullpath) and DocSettings:hasSidecarFile(b.fullpath) then
+                return true
+            end
+            return a.attr.change > b.attr.change
+        end
+    elseif self.collate == "size" then
+        sorting = function(a, b)
+            return a.attr.size < b.attr.size
+        end
+    elseif self.collate == "type" then
         sorting = function(a, b)
-            if reverse then
-                return a.attr.access < b.attr.access
+            if a.suffix == nil and b.suffix == nil then
+                return self.strcoll(a.name, b.name)
             else
-                return a.attr.access > b.attr.access
+                return self.strcoll(a.suffix, b.suffix)
             end
         end
+    else
+        sorting = function(a, b)
+            return a.name < b.name
+        end
+    end
+
+    if self.reverse_collate then
+        local sorting_unreversed = sorting
+        sorting = function(a, b) return sorting_unreversed(b, a) end
     end
 
     table.sort(dirs, sorting)

frontend/util.lua

@@ -266,6 +266,11 @@ function util.splitFileNameSuffix(file)
     return string.gsub(file, "(.*)%.(.*)", "%1"), string.gsub(file, ".*%.", "")
 end
 
+function util.getFileNameSuffix(file)
+    local _, suffix = util.splitFileNameSuffix(file)
+    return suffix
+end
+
 function util.getMenuText(item)
     local text
     if item.text_func then