486 lines
15 KiB
Lua
486 lines
15 KiB
Lua
local _ENV = mkmodule('plugins.overlay')
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local gui = require('gui')
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local json = require('json')
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local utils = require('utils')
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local widgets = require('gui.widgets')
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local OVERLAY_CONFIG_FILE = 'dfhack-config/overlay.json'
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local OVERLAY_WIDGETS_VAR = 'OVERLAY_WIDGETS'
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local DEFAULT_X_POS, DEFAULT_Y_POS = -2, -2
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-- ---------------- --
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-- state and config --
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-- ---------------- --
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local active_triggered_widget = nil
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local active_triggered_screen = nil -- if non-nil, hotspots will not get updates
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local widget_db = {} -- map of widget name to ephermeral state
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local widget_index = {} -- ordered list of widget names
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local overlay_config = {} -- map of widget name to persisted state
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local active_hotspot_widgets = {} -- map of widget names to the db entry
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local active_viewscreen_widgets = {} -- map of vs_name to map of w.names -> db
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local function reset()
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if active_triggered_screen then
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active_triggered_screen:dismiss()
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end
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active_triggered_widget = nil
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active_triggered_screen = nil
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widget_db = {}
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widget_index = {}
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local ok, config = pcall(json.decode_file, OVERLAY_CONFIG_FILE)
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overlay_config = ok and config or {}
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active_hotspot_widgets = {}
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active_viewscreen_widgets = {}
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end
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local function save_config()
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if not safecall(json.encode_file, overlay_config, OVERLAY_CONFIG_FILE) then
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dfhack.printerr(('failed to save overlay config file: "%s"')
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:format(path))
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end
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end
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local function triggered_screen_has_lock()
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if not active_triggered_screen then return false end
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if active_triggered_screen:isActive() then return true end
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active_triggered_widget = nil
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active_triggered_screen = nil
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return false
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end
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-- ----------- --
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-- utility fns --
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-- ----------- --
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local function normalize_list(element_or_list)
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if type(element_or_list) == 'table' then return element_or_list end
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return {element_or_list}
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end
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-- normalize "short form" viewscreen names to "long form"
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local function normalize_viewscreen_name(vs_name)
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if vs_name:match('viewscreen_.*st') then return vs_name end
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return 'viewscreen_' .. vs_name .. 'st'
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end
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-- reduce "long form" viewscreen names to "short form"
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local function simplify_viewscreen_name(vs_name)
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_,_,short_name = vs_name:find('^viewscreen_(.*)st$')
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if short_name then return short_name end
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return vs_name
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end
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local function is_empty(tbl)
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for _ in pairs(tbl) do
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return false
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end
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return true
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end
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local function sanitize_pos(pos)
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local x = math.floor(tonumber(pos.x) or DEFAULT_X_POS)
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local y = math.floor(tonumber(pos.y) or DEFAULT_Y_POS)
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-- if someone accidentally uses 0-based instead of 1-based indexing, fix it
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if x == 0 then x = 1 end
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if y == 0 then y = 1 end
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return {x=x, y=y}
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end
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local function make_frame(pos, old_frame)
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old_frame = old_frame or {}
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local frame = {w=old_frame.w, h=old_frame.h}
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if pos.x < 0 then frame.r = math.abs(pos.x) - 1 else frame.l = pos.x - 1 end
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if pos.y < 0 then frame.b = math.abs(pos.y) - 1 else frame.t = pos.y - 1 end
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return frame
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end
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local function get_screen_rect()
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local w, h = dfhack.screen.getWindowSize()
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return gui.ViewRect{rect=gui.mkdims_wh(0, 0, w, h)}
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end
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-- ------------- --
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-- CLI functions --
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-- ------------- --
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local function get_name(name_or_number)
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local num = tonumber(name_or_number)
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if num and widget_index[num] then
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return widget_index[num]
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end
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return tostring(name_or_number)
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end
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local function do_by_names_or_numbers(args, fn)
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local arglist = normalize_list(args)
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if #arglist == 0 then
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dfhack.printerr('please specify a widget name or list number')
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return
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end
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for _,name_or_number in ipairs(arglist) do
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local name = get_name(name_or_number)
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local db_entry = widget_db[name]
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if not db_entry then
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dfhack.printerr(('widget not found: "%s"'):format(name))
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else
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fn(name, db_entry)
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end
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end
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end
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local function do_enable(args, quiet, skip_save)
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local enable_fn = function(name, db_entry)
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overlay_config[name].enabled = true
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if db_entry.widget.hotspot then
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active_hotspot_widgets[name] = db_entry
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end
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for _,vs_name in ipairs(normalize_list(db_entry.widget.viewscreens)) do
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vs_name = normalize_viewscreen_name(vs_name)
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ensure_key(active_viewscreen_widgets, vs_name)[name] = db_entry
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end
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if not quiet then
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print(('enabled widget %s'):format(name))
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end
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end
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if args[1] == 'all' then
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for name,db_entry in pairs(widget_db) do
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if not overlay_config[name].enabled then
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enable_fn(name, db_entry)
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end
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end
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else
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do_by_names_or_numbers(args, enable_fn)
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end
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if not skip_save then
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save_config()
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end
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end
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local function do_disable(args)
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local disable_fn = function(name, db_entry)
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overlay_config[name].enabled = false
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if db_entry.widget.hotspot then
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active_hotspot_widgets[name] = nil
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end
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for _,vs_name in ipairs(normalize_list(db_entry.widget.viewscreens)) do
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vs_name = normalize_viewscreen_name(vs_name)
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ensure_key(active_viewscreen_widgets, vs_name)[name] = nil
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if is_empty(active_viewscreen_widgets[vs_name]) then
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active_viewscreen_widgets[vs_name] = nil
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end
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end
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print(('disabled widget %s'):format(name))
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end
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if args[1] == 'all' then
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for name,db_entry in pairs(widget_db) do
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if overlay_config[name].enabled then
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disable_fn(name, db_entry)
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end
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end
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else
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do_by_names_or_numbers(args, disable_fn)
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end
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save_config()
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end
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local function do_list(args)
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local filter = args and #args > 0
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local num_filtered = 0
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for i,name in ipairs(widget_index) do
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if filter then
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local passes = false
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for _,str in ipairs(args) do
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if name:find(str) then
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passes = true
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break
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end
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end
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if not passes then
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num_filtered = num_filtered + 1
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goto continue
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end
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end
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local db_entry = widget_db[name]
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local enabled = overlay_config[name].enabled
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dfhack.color(enabled and COLOR_LIGHTGREEN or COLOR_YELLOW)
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dfhack.print(enabled and '[enabled] ' or '[disabled]')
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dfhack.color()
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print((' %d) %s'):format(i, name))
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::continue::
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end
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if num_filtered > 0 then
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print(('(%d widgets filtered out)'):format(num_filtered))
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end
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end
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local function load_widget(name, widget_class)
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local widget = widget_class{name=name}
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widget_db[name] = {
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widget=widget,
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next_update_ms=widget.overlay_onupdate and 0 or math.huge,
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}
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if not overlay_config[name] then overlay_config[name] = {} end
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local config = overlay_config[name]
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config.pos = sanitize_pos(config.pos or widget.default_pos)
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widget.frame = make_frame(config.pos, widget.frame)
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if config.enabled then
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do_enable(name, true, true)
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else
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config.enabled = false
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end
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end
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local function load_widgets(env_prefix, provider, env_fn)
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local env_name = env_prefix .. provider
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local ok, provider_env = pcall(env_fn, env_name)
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if not ok or not provider_env[OVERLAY_WIDGETS_VAR] then return end
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local overlay_widgets = provider_env[OVERLAY_WIDGETS_VAR]
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if type(overlay_widgets) ~= 'table' then
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dfhack.printerr(
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('error loading overlay widgets from "%s": %s map is malformed')
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:format(env_name, OVERLAY_WIDGETS_VAR))
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return
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end
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for widget_name,widget_class in pairs(overlay_widgets) do
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local name = provider .. '.' .. widget_name
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if not safecall(load_widget, name, widget_class) then
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dfhack.printerr(('error loading overlay widget "%s"'):format(name))
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end
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end
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end
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-- called directly from cpp on plugin enable
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function reload()
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reset()
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for _,plugin in ipairs(dfhack.internal.listPlugins()) do
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load_widgets('plugins.', plugin, require)
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end
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for _,script_path in ipairs(dfhack.internal.getScriptPaths()) do
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local files = dfhack.filesystem.listdir_recursive(
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script_path, nil, false)
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if not files then goto skip_path end
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for _,f in ipairs(files) do
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if not f.isdir and
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f.path:endswith('.lua') and
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not f.path:startswith('test/') and
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not f.path:startswith('internal/') then
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local script_name = f.path:sub(1, #f.path - 4) -- remove '.lua'
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load_widgets('', script_name, reqscript)
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end
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end
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::skip_path::
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end
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for name in pairs(widget_db) do
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table.insert(widget_index, name)
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end
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table.sort(widget_index)
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reposition_widgets()
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end
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local function dump_widget_config(name, widget)
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local pos = overlay_config[name].pos
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print(('widget %s is positioned at x=%d, y=%d'):format(name, pos.x, pos.y))
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local viewscreens = normalize_list(widget.viewscreens)
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if #viewscreens > 0 then
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print(' it will be attached to the following viewscreens:')
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for _,vs in ipairs(viewscreens) do
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print((' %s'):format(simplify_viewscreen_name(vs)))
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end
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end
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if widget.hotspot then
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print(' it will act as a hotspot on all screens')
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end
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end
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local function do_position(args)
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local name_or_number, x, y = table.unpack(args)
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local name = get_name(name_or_number)
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if not widget_db[name] then
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if not name_or_number then
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dfhack.printerr('please specify a widget name or list number')
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else
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dfhack.printerr(('widget not found: "%s"'):format(name))
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end
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return
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end
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local widget = widget_db[name].widget
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local pos
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if x == 'default' then
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pos = sanitize_pos(widget.default_pos)
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else
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x, y = tonumber(x), tonumber(y)
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if not x or not y then
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dump_widget_config(name, widget)
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return
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end
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pos = sanitize_pos{x=x, y=y}
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end
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overlay_config[name].pos = pos
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widget.frame = make_frame(pos, widget.frame)
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widget:updateLayout(get_screen_rect())
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save_config()
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print(('repositioned widget %s to x=%d, y=%d'):format(name, pos.x, pos.y))
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end
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-- note that the widget does not have to be enabled to be triggered
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local function do_trigger(args)
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if triggered_screen_has_lock() then
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dfhack.printerr(('cannot trigger widget; widget "%s" is already active')
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:format(active_triggered_widget))
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return
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end
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do_by_names_or_numbers(args[1], function(name, db_entry)
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local widget = db_entry.widget
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if widget.overlay_trigger then
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active_triggered_screen = widget:overlay_trigger()
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if active_triggered_screen then
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active_triggered_widget = name
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end
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print(('triggered widget %s'):format(name))
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end
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end)
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end
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local command_fns = {
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enable=do_enable,
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disable=do_disable,
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list=do_list,
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position=do_position,
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trigger=do_trigger,
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}
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local HELP_ARGS = utils.invert{'help', '--help', '-h'}
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function overlay_command(args)
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local command = table.remove(args, 1) or 'help'
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if HELP_ARGS[command] or not command_fns[command] then return false end
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command_fns[command](args)
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return true
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end
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-- ---------------- --
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-- event management --
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-- ---------------- --
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local function detect_frame_change(widget, fn)
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local frame = widget.frame
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local w, h = frame.w, frame.h
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local ret = fn()
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if w ~= frame.w or h ~= frame.h then
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widget:updateLayout()
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end
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return ret
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end
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local function get_next_onupdate_timestamp(now_ms, widget)
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local freq_s = widget.overlay_onupdate_max_freq_seconds
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if freq_s == 0 then
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return now_ms
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end
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local freq_ms = math.floor(freq_s * 1000)
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local jitter = math.random(0, freq_ms // 8) -- up to ~12% jitter
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return now_ms + freq_ms - jitter
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end
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-- reduces the next call by a small random amount to introduce jitter into the
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-- widget processing timings
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local function do_update(name, db_entry, now_ms, vs)
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if db_entry.next_update_ms > now_ms then return end
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local w = db_entry.widget
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db_entry.next_update_ms = get_next_onupdate_timestamp(now_ms, w)
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if detect_frame_change(w, function() return w:overlay_onupdate(vs) end) then
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active_triggered_screen = w:overlay_trigger()
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if active_triggered_screen then
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active_triggered_widget = name
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return true
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end
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end
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end
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function update_hotspot_widgets()
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if triggered_screen_has_lock() then return end
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local now_ms = dfhack.getTickCount()
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for name,db_entry in pairs(active_hotspot_widgets) do
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if do_update(name, db_entry, now_ms) then return end
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end
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end
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-- not subject to trigger lock since these widgets are already filtered by
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-- viewscreen
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function update_viewscreen_widgets(vs_name, vs)
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local vs_widgets = active_viewscreen_widgets[vs_name]
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if not vs_widgets then return end
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local now_ms = dfhack.getTickCount()
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for name,db_entry in pairs(vs_widgets) do
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if do_update(name, db_entry, now_ms, vs) then return end
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end
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end
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function feed_viewscreen_widgets(vs_name, keys)
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local vs_widgets = active_viewscreen_widgets[vs_name]
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if not vs_widgets then return false end
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for _,db_entry in pairs(vs_widgets) do
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local w = db_entry.widget
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if detect_frame_change(w, function() return w:onInput(keys) end) then
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return true
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end
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end
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return false
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end
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function render_viewscreen_widgets(vs_name)
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local vs_widgets = active_viewscreen_widgets[vs_name]
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if not vs_widgets then return false end
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local dc = gui.Painter.new()
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for _,db_entry in pairs(vs_widgets) do
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local w = db_entry.widget
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detect_frame_change(w, function() w:render(dc) end)
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end
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end
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-- called when the DF window is resized
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function reposition_widgets()
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local sr = get_screen_rect()
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for _,db_entry in pairs(widget_db) do
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db_entry.widget:updateLayout(sr)
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end
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end
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-- ------------------------------------------------- --
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-- OverlayWidget (base class of all overlay widgets) --
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-- ------------------------------------------------- --
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OverlayWidget = defclass(OverlayWidget, widgets.Widget)
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OverlayWidget.ATTRS{
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name=DEFAULT_NIL, -- this is set by the framework to the widget name
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default_pos={x=DEFAULT_X_POS, y=DEFAULT_Y_POS}, -- 1-based widget screen pos
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hotspot=false, -- whether to call overlay_onupdate on all screens
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viewscreens={}, -- override with associated viewscreen or list of viewscrens
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overlay_onupdate_max_freq_seconds=5, -- throttle calls to overlay_onupdate
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}
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function OverlayWidget:init()
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if self.overlay_onupdate_max_freq_seconds < 0 then
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error(('overlay_onupdate_max_freq_seconds must be >= 0: %s')
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:format(tostring(self.overlay_onupdate_max_freq_seconds)))
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end
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-- set defaults for frame. the widget is expected to keep these up to date
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-- when display contents change so the widget position can shift if the
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-- frame is relative to the right or bottom edges.
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self.frame = self.frame or {}
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self.frame.w = self.frame.w or 5
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self.frame.h = self.frame.h or 1
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end
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return _ENV
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