WIP: File browser, needs bug fixes

lua/file_browser.lua

@@ -0,0 +1,73 @@
+local lvgl = require("lvgl")
+local widgets = require("widgets")
+local backstack = require("backstack")
+local font = require("font")
+local queue = require("queue")
+local playing = require("playing")
+local styles = require("styles")
+local playback = require("playback")
+local theme = require("theme")
+local screen = require("screen")
+local filesystem = require("filesystem")
+
+return screen:new{
+    createUi = function(self)
+        self.root = lvgl.Object(nil, {
+            flex = {
+                flex_direction = "column",
+                flex_wrap = "wrap",
+                justify_content = "flex-start",
+                align_items = "flex-start",
+                align_content = "flex-start"
+            },
+            w = lvgl.HOR_RES(),
+            h = lvgl.VER_RES()
+        })
+        self.root:center()
+
+        self.status_bar = widgets.StatusBar(self, {
+            back_cb = backstack.pop,
+            title = self.title
+        })
+
+        local header = self.root:Object{
+            flex = {
+                flex_direction = "column",
+                flex_wrap = "wrap",
+                justify_content = "flex-start",
+                align_items = "flex-start",
+                align_content = "flex-start"
+            },
+            w = lvgl.HOR_RES(),
+            h = lvgl.SIZE_CONTENT,
+            pad_left = 4,
+            pad_right = 4,
+            pad_bottom = 2,
+            bg_opa = lvgl.OPA(100),
+            scrollbar_mode = lvgl.SCROLLBAR_MODE.OFF
+        }
+        theme.set_style(header, "header")
+
+        if self.breadcrumb then
+            header:Label{
+                text = self.breadcrumb,
+                text_font = font.fusion_10
+            }
+        end
+
+        local recycle_list = widgets.RecyclerList(self.root, self.iterator, {
+            callback = function(item) 
+                return function()
+                    local is_dir = item:is_directory()
+                    if is_dir then
+                        backstack.push(require("file_browser"):new{
+                            title = self.title,
+                            iterator = filesystem.iterator(tostring(item)),
+                            breadcrumb = tostring(item)
+                        })
+                    end
+                end
+            end
+        })
+    end
+}

lua/main_menu.lua

@@ -5,6 +5,7 @@ local backstack = require("backstack")
 local browser = require("browser")
 local playing = require("playing")
 local styles = require("styles")
+local filesystem = require("filesystem")
 local screen = require("screen")
 
 return widgets.MenuScreen:new {
@@ -35,6 +36,15 @@ return widgets.MenuScreen:new {
       btn:add_style(styles.list_item)
     end
 
+    local files = list:add_btn(nil, "Files")
+    files:onClicked(function()
+      backstack.push(require("file_browser"):new {
+        title = "Files",
+        iterator = filesystem.iterator(""),
+      })
+    end)
+    files:add_style(styles.list_item)
+
     local settings = list:add_btn(nil, "Settings")
     settings:onClicked(function()
       backstack.push(require("settings"):new())

src/lua/file_iterator.cpp

@@ -17,12 +17,13 @@ namespace database {
 
 FileIterator::FileIterator(std::string filepath) 
 : original_path_(filepath),
-  current_()
+  current_(),
+  offset_(-1)
  {
   auto lock = drivers::acquire_spi();
 
-  const TCHAR* next_path = static_cast<const TCHAR*>(filepath.c_str());
-  FRESULT res = f_opendir(&dir_, next_path);
+  const TCHAR* path = static_cast<const TCHAR*>(filepath.c_str());
+  FRESULT res = f_opendir(&dir_, path);
   if (res != FR_OK) {
     ESP_LOGE(kTag, "Error opening directory: %s", filepath.c_str());
   }
@@ -42,36 +43,40 @@ auto FileIterator::next() -> void {
 }
 
 auto FileIterator::prev() -> void {
-  iterate(true);
+  if (offset_ == 0) {
+    current_.reset();
+    return;
+  }
+  f_rewinddir(&dir_);
+  auto new_offset = offset_-1;
+  offset_ = -1;
+  for (int i = 0; i < new_offset; i++) {
+    iterate(false);
+  }
 }
 
 auto FileIterator::iterate(bool reverse) -> bool {
     FILINFO info;
-    if (reverse) {
-      f_rewinddir(&dir_);
-    }
     {
       auto lock = drivers::acquire_spi();
       auto res = f_readdir(&dir_, &info);
       if (res != FR_OK) {
-        ESP_LOGI(kTag, "AAAAAAAAAAAAAAAAAAA");
-        ESP_LOGI(kTag, "%d", res);
+        ESP_LOGE(kTag, "Error reading directory. Error: %d", res);
         return false;
       }
     }
     if (info.fname[0] == 0) {
       // End of directory
+      // Set value to nil
       current_.reset();
-      ESP_LOGI(kTag, "End of dir");
-
     } else {
       // Update current value
-      ESP_LOGI(kTag, "File: %s", info.fname);
+      offset_++;
       current_ = FileEntry{
         .isHidden = (info.fattrib & AM_HID) > 0,
         .isDirectory = (info.fattrib & AM_DIR) > 0,
         .isTrack = false, // TODO
-        .filepath = original_path_ + info.fname,
+        .filepath = original_path_ + (original_path_.size()>0?"/":"") + info.fname,
 
       };
     }

src/lua/include/file_iterator.hpp

@@ -36,6 +36,7 @@ class FileIterator {
   std::string original_path_;
 
   std::optional<FileEntry> current_;
+  int offset_;
 
   auto iterate(bool reverse = false) -> bool;
 };

src/lua/lua_filesystem.cpp

@@ -88,11 +88,11 @@ static auto fs_iterate(lua_State* state) -> int {
   return 1;
 }
 
-// static auto db_iterator_clone(lua_State* state) -> int {
-//   database::Iterator* it = db_check_iterator(state, 1);
-//   push_iterator(state, *it);
-//   return 1;
-// }
+static auto fs_iterator_clone(lua_State* state) -> int {
+  database::FileIterator* it = check_file_iterator(state, 1);
+  push_iterator(state, *it);
+  return 1;
+}
 
 static auto fs_iterator_gc(lua_State* state) -> int {
   database::FileIterator* it = check_file_iterator(state, 1);
@@ -102,7 +102,7 @@ static auto fs_iterator_gc(lua_State* state) -> int {
 
 static const struct luaL_Reg kFileIteratorFuncs[] = {{"next", fs_iterate},
                                                    {"prev", fs_iterate_prev},
-                                                  //  {"clone", db_iterator_clone},
+                                                   {"clone", fs_iterator_clone},
                                                    {"__call", fs_iterate},
                                                    {"__gc", fs_iterator_gc},
                                                    {NULL, NULL}};
@@ -114,7 +114,31 @@ static auto file_entry_path(lua_State* state) -> int {
   return 1;
 }
 
+static auto file_entry_is_dir(lua_State* state) -> int {
+  LuaFileEntry* data = reinterpret_cast<LuaFileEntry*>(
+      luaL_checkudata(state, 1, kFileEntryMetatable));
+  lua_pushboolean(state, data->isDirectory);
+  return 1;
+}
+
+static auto file_entry_is_hidden(lua_State* state) -> int {
+  LuaFileEntry* data = reinterpret_cast<LuaFileEntry*>(
+      luaL_checkudata(state, 1, kFileEntryMetatable));
+  lua_pushboolean(state, data->isHidden);
+  return 1;
+}
+
+static auto file_entry_is_track(lua_State* state) -> int {
+  LuaFileEntry* data = reinterpret_cast<LuaFileEntry*>(
+      luaL_checkudata(state, 1, kFileEntryMetatable));
+  lua_pushboolean(state, data->isTrack);
+  return 1;
+}
+
 static const struct luaL_Reg kFileEntryFuncs[] = {{"filepath", file_entry_path},
+                                                 {"is_directory", file_entry_is_dir},
+                                                 {"is_hidden", file_entry_is_hidden},
+                                                 {"is_track", file_entry_is_track},
                                                  {"__tostring", file_entry_path},
                                                  {NULL, NULL}};