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|
--------------------------------------------------------------------------------------------------------
--------------------------------Scroll/Select Implementation--------------------------------------------
--------------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------------------------------------
local g = require 'modules.globals'
local fb_utils = require 'modules.utils'
local ass = require 'modules.ass'
---@class cursor
local cursor = {}
--disables multiselect
function cursor.disable_select_mode()
g.state.multiselect_start = nil
g.state.initial_selection = nil
end
--enables multiselect
function cursor.enable_select_mode()
g.state.multiselect_start = g.state.selected
g.state.initial_selection = fb_utils.copy_table(g.state.selection)
end
--calculates what drag behaviour is required for that specific movement
local function drag_select(original_pos, new_pos)
if original_pos == new_pos then return end
local setting = g.state.selection[g.state.multiselect_start or -1]
for i = original_pos, new_pos, (new_pos > original_pos and 1 or -1) do
--if we're moving the cursor away from the starting point then set the selection
--otherwise restore the original selection
if i > g.state.multiselect_start then
if new_pos > original_pos then
g.state.selection[i] = setting
elseif i ~= new_pos then
g.state.selection[i] = g.state.initial_selection[i]
end
elseif i < g.state.multiselect_start then
if new_pos < original_pos then
g.state.selection[i] = setting
elseif i ~= new_pos then
g.state.selection[i] = g.state.initial_selection[i]
end
end
end
end
--moves the selector up and down the list by the entered amount
function cursor.scroll(n, wrap)
local num_items = #g.state.list
if num_items == 0 then return end
local original_pos = g.state.selected
if original_pos + n > num_items then
g.state.selected = wrap and 1 or num_items
elseif original_pos + n < 1 then
g.state.selected = wrap and num_items or 1
else
g.state.selected = original_pos + n
end
if g.state.multiselect_start then drag_select(original_pos, g.state.selected) end
ass.update_ass()
end
--selects the first item in the list which is highlighted as playing
function cursor.select_playing_item()
for i,item in ipairs(g.state.list) do
if ass.highlight_entry(item) then
g.state.selected = i
return
end
end
end
--scans the list for which item to select by default
--chooses the folder that the script just moved out of
--or, otherwise, the item highlighted as currently playing
function cursor.select_prev_directory()
-- makes use of the directory stack to more exactly select the prev directory
local down_stack = g.directory_stack.stack[g.directory_stack.position + 1]
if down_stack then
for i, item in ipairs(g.state.list) do
if fb_utils.get_new_directory(item, g.state.directory) == down_stack then
g.state.selected = i
return
end
end
end
if g.state.prev_directory:find(g.state.directory, 1, true) == 1 then
for i, item in ipairs(g.state.list) do
if
g.state.prev_directory:find(fb_utils.get_full_path(item), 1, true) or
g.state.prev_directory:find(fb_utils.get_new_directory(item, g.state.directory), 1, true)
then
g.state.selected = i
return
end
end
end
cursor.select_playing_item()
end
--toggles the selection
function cursor.toggle_selection()
if not g.state.list[g.state.selected] then return end
g.state.selection[g.state.selected] = not g.state.selection[g.state.selected] or nil
ass.update_ass()
end
--select all items in the list
function cursor.select_all()
for i,_ in ipairs(g.state.list) do
g.state.selection[i] = true
end
ass.update_ass()
end
--toggles select mode
function cursor.toggle_select_mode()
if g.state.multiselect_start == nil then
cursor.enable_select_mode()
cursor.toggle_selection()
else
cursor.disable_select_mode()
ass.update_ass()
end
end
return cursor
|
