first commit

mpv/scripts/file-browser/modules/navigation/cursor.lua

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+--------------------------------------------------------------------------------------------------------
+--------------------------------Scroll/Select Implementation--------------------------------------------
+--------------------------------------------------------------------------------------------------------
+--------------------------------------------------------------------------------------------------------
+
+local g = require 'modules.globals'
+local fb_utils = require 'modules.utils'
+local ass = require 'modules.ass'
+
+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]
+    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()
+    if g.state.prev_directory:find(g.state.directory, 1, true) == 1 then
+        local i = 1
+        while (g.state.list[i] and fb_utils.parseable_item(g.state.list[i])) do
+            if g.state.prev_directory:find(fb_utils.get_full_path(g.state.list[i]), 1, true) then
+                g.state.selected = i
+                return
+            end
+            i = i+1
+        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