FileManager: less lfs calls (#11452)

Use item info provided by FileChooser.
Also fix showing PathChooser with invalid path,
and fix issue when opening non-supported files.

frontend/apps/filemanager/filemanager.lua

@@ -185,18 +185,18 @@ function FileManager:setupLayout()
         return true
     end
 
-    function file_chooser:onFileHold(file)
+    function file_chooser:onFileHold(item)
         if file_manager.select_mode then
             file_manager:tapPlus()
         else
-            self:showFileDialog(file)
+            self:showFileDialog(item)
         end
     end
 
-    function file_chooser:showFileDialog(file)  -- luacheck: ignore
-        local is_file = isFile(file)
-        local is_folder = lfs.attributes(file, "mode") == "directory"
-        local is_not_parent_folder = BaseUtil.basename(file) ~= ".."
+    function file_chooser:showFileDialog(item)  -- luacheck: ignore
+        local file = item.path
+        local is_file = item.is_file
+        local is_not_parent_folder = not item.is_go_up
 
         local function close_dialog_callback()
             UIManager:close(self.file_dialog)
@@ -324,9 +324,7 @@ function FileManager:setupLayout()
                     },
                 })
             end
-        end
-
-        if is_folder then
+        else -- folder
             local folder = BaseUtil.realpath(file)
             table.insert(buttons, {
                 {
@@ -1495,7 +1493,7 @@ function FileManager:openFile(file, provider, doc_caller_callback, aux_caller_ca
     if provider == nil then
         provider = DocumentRegistry:getProvider(file, true) -- include auxiliary
     end
-    if provider.order then -- auxiliary
+    if provider and provider.order then -- auxiliary
         if aux_caller_callback then
             aux_caller_callback()
         end

frontend/document/documentregistry.lua

@@ -98,7 +98,7 @@ function DocumentRegistry:getProvider(file, include_aux)
             return provider
         end
         -- highest weighted provider
-        return providers[1].provider
+        return providers and providers[1].provider
     end
     return self:getFallbackProvider()
 end

frontend/ui/widget/filechooser.lua

@@ -232,6 +232,9 @@ end
 
 function FileChooser:init()
     self.path_items = {}
+    if lfs.attributes(self.path, "mode") ~= "directory" then
+        self.path = G_reader_settings:readSetting("home_dir") or filemanagerutil.getDefaultDir()
+    end
     self.item_table = self:genItemTableFromPath(self.path)
     Menu.init(self) -- call parent's init()
 end
@@ -540,7 +543,7 @@ function FileChooser:onMenuSelect(item)
 end
 
 function FileChooser:onMenuHold(item)
-    self:onFileHold(item.path)
+    self:onFileHold(item)
     return true
 end
 
@@ -549,7 +552,7 @@ function FileChooser:onFileSelect(file)
     return true
 end
 
-function FileChooser:onFileHold(file)
+function FileChooser:onFileHold(item)
     return true
 end
 

plugins/coverbrowser.koplugin/covermenu.lua

@@ -242,10 +242,11 @@ function CoverMenu:updateItems(select_number)
             -- Replace it with ours
             -- This causes luacheck warning: "shadowing upvalue argument 'self' on line 34".
             -- Ignoring it (as done in filemanager.lua for the same showFileDialog)
-            self.showFileDialog = function(self, file) -- luacheck: ignore
+            self.showFileDialog = function(self, item) -- luacheck: ignore
+                local file = item.path
                 -- Call original function: it will create a ButtonDialog
                 -- and store it as self.file_dialog, and UIManager:show() it.
-                self.showFileDialog_orig(self, file)
+                self.showFileDialog_orig(self, item)
 
                 local bookinfo = self.book_props -- getBookInfo(file) called by FileManager
                 if not bookinfo or bookinfo._is_directory then