1 files changed, 209 insertions, 0 deletions
diff --git a/mpv/scripts/file-browser/modules/navigation/directory-movement.lua b/mpv/scripts/file-browser/modules/navigation/directory-movement.lua
new file mode 100644
index 0000000..37e85c8
--- /dev/null
+++ b/mpv/scripts/file-browser/modules/navigation/directory-movement.lua
@@ -0,0 +1,209 @@
+
+local mp = require 'mp'
+local msg = require 'mp.msg'
+local utils = require 'mp.utils'
+
+local o = require 'modules.options'
+local g = require 'modules.globals'
+local ass = require 'modules.ass'
+local scanning = require 'modules.navigation.scanning'
+local fb_utils = require 'modules.utils'
+local cursor = require 'modules.navigation.cursor'
+
+---@class directory_movement
+local directory_movement = {}
+local NavType = scanning.NavType
+
+---Appends an item to the directory stack, wiping any
+---directories further ahead than the current position.
+---@param dir string
+local function directory_stack_append(dir)
+    -- don't clear the stack if we're re-entering the same directory
+    if g.directory_stack.stack[g.directory_stack.position + 1] == dir then
+        g.directory_stack.position = g.directory_stack.position + 1
+        return
+    end
+
+    local j = #g.directory_stack.stack
+    while g.directory_stack.position < j do
+        g.directory_stack.stack[j] = nil
+        j = j - 1
+    end
+    table.insert(g.directory_stack.stack, dir)
+    g.directory_stack.position = g.directory_stack.position + 1
+end
+
+---@param dir string
+local function directory_stack_prepend(dir)
+    table.insert(g.directory_stack.stack, 1, dir)
+    g.directory_stack.position = 1
+end
+
+---Clears directories from the history
+---@param from? number All entries >= this index are cleared.
+---@return string[]
+function directory_movement.clear_history(from)
+    ---@type string[]
+    local cleared = {}
+
+    from = from or 1
+    for i = g.history.size, from, -1 do
+        table.insert(cleared, g.history.list[i])
+        g.history.list[i] = nil
+        g.history.size = g.history.size - 1
+
+        if g.history.position >= i then
+            g.history.position = g.history.position - 1
+        end
+    end
+
+    return cleared
+end
+
+---Append a directory to the history
+---If we have navigated backward in the history,
+---then clear any history beyond the current point.
+---@param directory string
+function directory_movement.append_history(directory)
+    if g.history.list[g.history.position] == directory then
+        msg.debug('reloading same directory - history unchanged:', directory)
+        return
+    end
+
+    msg.debug('appending to history:', directory)
+    if g.history.position < g.history.size then
+        directory_movement.clear_history(g.history.position + 1)
+    end
+
+    table.insert(g.history.list, directory)
+    g.history.size = g.history.size + 1
+    g.history.position = g.history.position + 1
+
+    if g.history.size > o.history_size then
+        table.remove(g.history.list, 1)
+        g.history.size = g.history.size - 1
+    end
+end
+
+---@param filepath string
+function directory_movement.set_current_file(filepath)
+    --if we're in idle mode then we want to open the working directory
+    if filepath == nil then
+        g.current_file.directory = fb_utils.fix_path( mp.get_property("working-directory", ""), true)
+        g.current_file.name = nil
+        g.current_file.path = nil
+        g.current_file.original_path = nil
+        return
+    end
+
+    local absolute_path = fb_utils.absolute_path(filepath)
+    local resolved_path = fb_utils.resolve_directory_mapping(absolute_path)
+
+    g.current_file.directory, g.current_file.name = utils.split_path(resolved_path)
+    g.current_file.original_path = absolute_path
+    g.current_file.path = resolved_path
+
+    if o.cursor_follows_playing_item then cursor.select_playing_item() end
+    ass.update_ass()
+end
+
+--the base function for moving to a directory
+---@param directory string
+---@param nav_type? NavigationType
+---@param store_history? boolean default `true`
+---@param parse_properties? ParseProperties
+---@return thread
+function directory_movement.goto_directory(directory, nav_type, store_history, parse_properties)
+    local current = g.state.list[g.state.selected]
+    g.state.directory = directory
+
+    if g.state.directory_label then
+        if nav_type == NavType.DOWN then
+            g.state.directory_label = g.state.directory_label..(current.label or current.name)
+        elseif nav_type == NavType.UP then
+            g.state.directory_label = string.match(g.state.directory_label, "^(.-/+)[^/]+/*$")
+        end
+    end
+
+    if o.history_size > 0 and store_history == nil or store_history then
+        directory_movement.append_history(directory)
+    end
+
+    return scanning.rescan(nav_type or NavType.GOTO, nil, parse_properties)
+end
+
+---Move the browser to a particular point in the browser history.
+---The history is a linear list of visited directories from oldest to newest.
+---If the user changes directories while the current history position is not the head of the list,
+---any later directories get cleared and the new directory becomes the new head.
+---@param pos number The history index to move to. Clamped to [1,history_length]
+---@return number|false # The index actually moved to after clamping. Returns -1 if the index was invalid (can occur if history is empty or disabled)
+function directory_movement.goto_history(pos)
+    if type(pos) ~= "number" then return false end
+
+    if pos < 1 then pos = 1
+    elseif pos > g.history.size then pos = g.history.size end
+    if not g.history.list[pos] then return false end
+
+    g.history.position = pos
+    directory_movement.goto_directory(g.history.list[pos])
+    return pos
+end
+
+--loads the root list
+function directory_movement.goto_root()
+    msg.verbose('jumping to root')
+    return directory_movement.goto_directory("")
+end
+
+--switches to the directory of the currently playing file
+function directory_movement.goto_current_dir()
+    msg.verbose('jumping to current directory')
+    return directory_movement.goto_directory(g.current_file.directory)
+end
+
+--moves up a directory
+function directory_movement.up_dir()
+    if g.state.directory == '' then return end
+
+    local cached_parent_dir = g.directory_stack.stack[g.directory_stack.position - 1]
+    if cached_parent_dir then
+        g.directory_stack.position = g.directory_stack.position - 1
+        return directory_movement.goto_directory(cached_parent_dir, NavType.UP)
+    end
+
+    local parent_dir = g.state.directory:match("^(.-/+)[^/]+/*$") or ""
+
+    if o.skip_protocol_schemes and parent_dir:find("^(%a[%w+-.]*)://$") then
+        return directory_movement.goto_root()
+    end
+
+    directory_stack_prepend(parent_dir)
+    return directory_movement.goto_directory(parent_dir, NavType.UP)
+end
+
+--moves down a directory
+function directory_movement.down_dir()
+    local current = g.state.list[g.state.selected]
+    if not current or not fb_utils.parseable_item(current) then return end
+
+    local directory, redirected = fb_utils.get_new_directory(current, g.state.directory)
+    directory_stack_append(directory)
+    return directory_movement.goto_directory(directory, redirected and NavType.REDIRECT or NavType.DOWN)
+end
+
+--moves backwards through the directory history
+function directory_movement.back_history()
+    msg.debug('moving backwards in history to', g.history.list[g.history.position-1])
+    if g.history.position == 1 then return end
+    directory_movement.goto_history(g.history.position - 1)
+end
+
+--moves forward through the history
+function directory_movement.forwards_history()
+    msg.debug('moving forwards in history to', g.history.list[g.history.position+1])
+    if g.history.position == g.history.size then return end
+    directory_movement.goto_history(g.history.position + 1)
+end
+
+return directory_movement