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awesome/lib/awful/rules.lua

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---------------------------------------------------------------------------
--- Rules for clients.
--
-- This module applies @{rules} to clients during startup (via @{client.manage},
-- but its functions can be used for client matching in general.
--
-- All existing `client` properties can be used in rules. It is also possible
-- to add random properties that will be later accessible as `c.property_name`
-- (where `c` is a valid client object)
--
-- Syntax
-- ===
-- You should fill this table with your rule and properties to apply.
-- For example, if you want to set xterm maximized at startup, you can add:
--
-- { rule = { class = "xterm" },
-- properties = { maximized_vertical = true, maximized_horizontal = true } }
--
-- If you want to set mplayer floating at startup, you can add:
--
-- { rule = { name = "MPlayer" },
-- properties = { floating = true } }
--
-- If you want to put Firefox on a specific tag at startup, you can add:
--
-- { rule = { instance = "firefox" },
-- properties = { tag = mytagobject } }
--
-- Alternatively, you can specify the tag by name:
--
-- { rule = { instance = "firefox" },
-- properties = { tag = "3" } }
--
-- If you want to put Thunderbird on a specific screen at startup, use:
--
-- { rule = { instance = "Thunderbird" },
-- properties = { screen = 1 } }
--
-- Assuming that your X11 server supports the RandR extension, you can also specify
-- the screen by name:
--
-- { rule = { instance = "Thunderbird" },
-- properties = { screen = "VGA1" } }
--
-- If you want to put Emacs on a specific tag at startup, and immediately switch
-- to that tag you can add:
--
-- { rule = { class = "Emacs" },
-- properties = { tag = mytagobject, switchtotag = true } }
--
-- If you want to apply a custom callback to execute when a rule matched,
-- for example to pause playing music from mpd when you start dosbox, you
-- can add:
--
-- { rule = { class = "dosbox" },
-- callback = function(c)
-- awful.spawn('mpc pause')
-- end }
--
-- Note that all "rule" entries need to match. If any of the entry does not
-- match, the rule won't be applied.
--
-- If a client matches multiple rules, they are applied in the order they are
-- put in this global rules table. If the value of a rule is a string, then the
-- match function is used to determine if the client matches the rule.
--
-- If the value of a property is a function, that function gets called and
-- function's return value is used for the property.
--
-- To match multiple clients to a rule one need to use slightly different
-- syntax:
--
-- { rule_any = { class = { "MPlayer", "Nitrogen" }, instance = { "xterm" } },
-- properties = { floating = true } }
--
-- To match multiple clients with an exception one can couple `rules.except` or
-- `rules.except_any` with the rules:
--
-- { rule = { class = "Firefox" },
-- except = { instance = "Navigator" },
-- properties = {floating = true},
-- },
--
-- { rule_any = { class = { "Pidgin", "Xchat" } },
-- except_any = { role = { "conversation" } },
-- properties = { tag = "1" }
-- }
--
-- { rule = {},
-- except_any = { class = { "Firefox", "Vim" } },
-- properties = { floating = true }
-- }
--
-- Applicable client properties
-- ===
--
-- The table below holds the list of default client properties along with
-- some extra properties that are specific to the rules. Note that any property
-- can be set in the rules and interpreted by user provided code. This table
-- only represent those offered by default.
--
--@DOC_rules_index_COMMON@
--
-- @author Julien Danjou <julien@danjou.info>
-- @copyright 2009 Julien Danjou
-- @module awful.rules
---------------------------------------------------------------------------
-- Grab environment we need
local client = client
local awesome = awesome
local screen = screen
local table = table
local type = type
local ipairs = ipairs
local pairs = pairs
local atag = require("awful.tag")
local gtable = require("gears.table")
local a_place = require("awful.placement")
local protected_call = require("gears.protected_call")
local aspawn = require("awful.spawn")
local gdebug = require("gears.debug")
local gmatcher = require("gears.matcher")
local unpack = unpack or table.unpack -- luacheck: globals unpack (compatibility with Lua 5.1)
local rules = {}
--- This is the global rules table.
rules.rules = {}
local crules = gmatcher()
--- Check if a client matches a rule.
-- @client c The client.
-- @tab rule The rule to check.
-- @treturn bool True if it matches, false otherwise.
function rules.match(c, rule)
return crules:_match(c, rule)
end
--- Check if a client matches any part of a rule.
-- @client c The client.
-- @tab rule The rule to check.
-- @treturn bool True if at least one rule is matched, false otherwise.
function rules.match_any(c, rule)
return crules:_match_any(c, rule)
end
--- Does a given rule entry match a client?
-- @client c The client.
-- @tab entry Rule entry (with keys `rule`, `rule_any`, `except` and/or
-- `except_any`).
-- @treturn bool
function rules.matches(c, entry)
return crules:matches_rule(c, entry)
end
--- Get list of matching rules for a client.
-- @client c The client.
-- @tab _rules The rules to check. List with "rule", "rule_any", "except" and
-- "except_any" keys.
-- @treturn table The list of matched rules.
function rules.matching_rules(c, _rules)
return crules:matching_rules(c, _rules)
end
--- Check if a client matches a given set of rules.
-- @client c The client.
-- @tab _rules The rules to check. List of tables with `rule`, `rule_any`,
-- `except` and `except_any` keys.
-- @treturn bool True if at least one rule is matched, false otherwise.
function rules.matches_list(c, _rules)
return crules:matches_rules(c, _rules)
end
--- Remove a source.
-- @tparam string name The source name.
-- @treturn boolean If the source was removed,
function rules.remove_rule_source(name)
return crules:remove_matching_source(name)
end
--- Apply awful.rules.rules to a client.
-- @client c The client.
function rules.apply(c)
return crules:apply(c)
end
--- Add a new rule source.
--
-- A rule source is a provider called when a client is managed (started). It
-- allows to configure the client by providing properties that should be applied.
-- By default, Awesome provides 2 sources:
--
-- * `awful.rules`: A declarative matcher
-- * `awful.spawn`: Launch clients with pre-defined properties
--
-- It is possible to register new callbacks to modify the properties table
-- before it is applied. Each provider is executed sequentially and modifies the
-- same table. If the first provider set a property, then the second can
-- override it, then the third, etc. Once the providers are exhausted, the
-- properties are applied on the client.
--
-- It is important to note that properties themselves have their own
-- dependencies. For example, a `tag` property implies a `screen`. Therefor, if
-- a `screen` is already specified, then it will be ignored when the rule is
-- executed. Properties also have their own priorities. For example, the
-- `titlebar` and `border_width` need to be applied before the `x` and `y`
-- positions are set. Otherwise, it will be off or the client will shift
-- upward everytime Awesome is restarted. A rule source *cannot* change this.
-- It is up to the callback to be aware of the dependencies and avoid to
-- introduce issues. For example, if the source wants to set a `screen`, it has
-- to check if the `tag`, `tags` or `new_tag` are on that `screen` or remove
-- those properties. Otherwise, they will be ignored once the rule is applied.
--
-- @tparam string name The provider name. It must be unique.
-- @tparam function callback The callback that is called to produce properties.
-- @tparam client callback.c The client
-- @tparam table callback.properties The current properties. The callback should
-- add to and overwrite properties in this table
-- @tparam table callback.callbacks A table of all callbacks scheduled to be
-- executed after the main properties are applied.
-- @tparam[opt={}] table depends_on A list of names of sources this source depends on
-- (sources that must be executed *before* `name`.
-- @tparam[opt={}] table precede A list of names of sources this source have a
-- priority over.
-- @treturn boolean Returns false if a dependency conflict was found.
-- @function awful.rules.add_rule_source
function rules.add_rule_source(name, cb, ...)
local function callback(_, ...)
cb(...)
end
return crules:add_matching_function(name, callback, ...)
end
-- Add the rules properties
local function apply_awful_rules(c, props, callbacks)
for _, entry in ipairs(rules.matching_rules(c, rules.rules)) do
gtable.crush(props,entry.properties or {})
if entry.callback then
table.insert(callbacks, entry.callback)
end
end
end
--- The default `awful.rules` source.
--
-- **Has priority over:**
--
-- *nothing*
--
-- @rulesources awful.rules
rules.add_rule_source("awful.rules", apply_awful_rules, {"awful.spawn"}, {})
-- Add startup_id overridden properties
local function apply_spawn_rules(c, props, callbacks)
if c.startup_id and aspawn.snid_buffer[c.startup_id] then
local snprops, sncb = unpack(aspawn.snid_buffer[c.startup_id])
-- The SNID tag(s) always have precedence over the rules one(s)
if snprops.tag or snprops.tags or snprops.new_tag then
props.tag, props.tags, props.new_tag = nil, nil, nil
end
gtable.crush(props, snprops)
gtable.merge(callbacks, sncb)
end
end
--- The rule source for clients spawned by `awful.spawn`.
--
-- **Has priority over:**
--
-- * `awful.rules`
--
-- @rulesources awful.spawn
rules.add_rule_source("awful.spawn", apply_spawn_rules, {}, {"awful.rules"})
local function apply_singleton_rules(c, props, callbacks)
local persis_id, info = c.single_instance_id, nil
-- This is a persistent property set by `awful.spawn`
if awesome.startup and persis_id then
info = aspawn.single_instance_manager.by_uid[persis_id]
elseif c.startup_id then
info = aspawn.single_instance_manager.by_snid[c.startup_id]
aspawn.single_instance_manager.by_snid[c.startup_id] = nil
elseif aspawn.single_instance_manager.by_pid[c.pid] then
info = aspawn.single_instance_manager.by_pid[c.pid].matcher(c) and
aspawn.single_instance_manager.by_pid[c.pid] or nil
end
if info then
c.single_instance_id = info.hash
if info.rules then
gtable.crush(props, info.rules)
end
table.insert(callbacks, info.callback)
table.insert(info.instances, c)
-- Prevent apps with multiple clients from re-using this too often in
-- the first 30 seconds before the PID is cleared.
aspawn.single_instance_manager.by_pid[c.pid] = nil
end
end
--- The rule source for clients spawned by `awful.spawn.once` and `single_instance`.
--
-- **Has priority over:**
--
-- * `awful.rules`
--
-- **Depends on:**
--
-- * `awful.spawn`
--
-- @rulesources awful.spawn_once
rules.add_rule_source("awful.spawn_once", apply_singleton_rules, {"awful.spawn"}, {"awful.rules"})
local function add_to_tag(c, t)
if not t then return end
local tags = c:tags()
table.insert(tags, t)
c:tags(tags)
end
--- Extra rules properties.
--
-- These properties are used in the rules only and are not sent to the client
-- afterward.
--
-- To add a new properties, just do:
--
-- function awful.rules.extra_properties.my_new_property(c, value, props)
-- -- do something
-- end
--
-- By default, the table has the following functions:
--
-- * geometry
-- * placement
--
-- @tfield table awful.rules.extra_properties
rules.extra_properties = {}
--- Extra high priority properties.
--
-- Some properties, such as anything related to tags, geometry or focus, will
-- cause a race condition if set in the main property section. This is why
-- they have a section for them.
--
-- To add a new properties, just do:
--
-- function awful.rules.high_priority_properties.my_new_property(c, value, props)
-- -- do something
-- end
--
-- By default, the table has the following functions:
--
-- * tag
-- * new_tag
--
-- @tfield table awful.rules.high_priority_properties
rules.high_priority_properties = {}
--- Delayed properties.
-- Properties applied after all other categories.
-- @tfield table awful.rules.delayed_properties
-- By default, the table has the following functions:
--
-- * switch_to_tags
rules.delayed_properties = {}
local force_ignore = {
titlebars_enabled=true, focus=true, screen=true, x=true,
y=true, width=true, height=true, geometry=true,placement=true,
border_width=true,floating=true,size_hints_honor=true
}
function rules.high_priority_properties.tag(c, value, props)
if value then
if type(value) == "string" then
local name = value
value = atag.find_by_name(c.screen, value)
if not value and not props.screen then
value = atag.find_by_name(nil, name)
end
if not value then
require("gears.debug").print_error("awful.rules-rule specified "
.. "tag = '" .. name .. "', but no such tag exists")
return
end
end
-- In case the tag has been forced to another screen, move the client
if c.screen ~= value.screen then
c.screen = value.screen
props.screen = value.screen -- In case another rule query it
end
c:tags{ value }
end
end
function rules.delayed_properties.switch_to_tags(c, value)
if not value then return end
atag.viewmore(c:tags(), c.screen)
end
function rules.delayed_properties.switchtotag(c, value)
gdebug.deprecate("Use switch_to_tags instead of switchtotag", {deprecated_in=5})
rules.delayed_properties.switch_to_tags(c, value)
end
function rules.extra_properties.geometry(c, _, props)
local cur_geo = c:geometry()
local new_geo = type(props.geometry) == "function"
and props.geometry(c, props) or props.geometry or {}
for _, v in ipairs {"x", "y", "width", "height"} do
new_geo[v] = type(props[v]) == "function" and props[v](c, props)
or props[v] or new_geo[v] or cur_geo[v]
end
c:geometry(new_geo) --TODO use request::geometry
end
function rules.high_priority_properties.new_tag(c, value, props)
local ty = type(value)
local t = nil
if ty == "boolean" then
-- Create a new tag named after the client class
t = atag.add(c.class or "N/A", {screen=c.screen, volatile=true})
elseif ty == "string" then
-- Create a tag named after "value"
t = atag.add(value, {screen=c.screen, volatile=true})
elseif ty == "table" then
-- Assume a table of tags properties. Set the right screen, but
-- avoid editing the original table
local values = value.screen and value or gtable.clone(value)
values.screen = values.screen or c.screen
t = atag.add(value.name or c.class or "N/A", values)
-- In case the tag has been forced to another screen, move the client
c.screen = t.screen
props.screen = t.screen -- In case another rule query it
else
assert(false)
end
add_to_tag(c, t)
return t
end
function rules.extra_properties.placement(c, value, props)
-- Avoid problems
if awesome.startup and
(c.size_hints.user_position or c.size_hints.program_position) then
return
end
local ty = type(value)
local args = {
honor_workarea = props.honor_workarea ~= false,
honor_padding = props.honor_padding ~= false
}
if ty == "function" or (ty == "table" and
getmetatable(value) and getmetatable(value).__call
) then
value(c, args)
elseif ty == "string" and a_place[value] then
a_place[value](c, args)
end
end
function rules.high_priority_properties.tags(c, value, props)
local current = c:tags()
local tags, s = {}, nil
for _, t in ipairs(value) do
if type(t) == "string" then
t = atag.find_by_name(c.screen, t)
end
if t and ((not s) or t.screen == s) then
table.insert(tags, t)
s = s or t.screen
end
end
if s and s ~= c.screen then
c.screen = s
props.screen = s -- In case another rule query it
end
if #current == 0 or (value[1] and value[1].screen ~= current[1].screen) then
c:tags(tags)
else
c:tags(gtable.merge(current, tags))
end
end
--- Apply properties and callbacks to a client.
-- @client c The client.
-- @tab props Properties to apply.
-- @tab[opt] callbacks Callbacks to apply.
-- @function awful.rules.execute
crules._execute = function(_, c, props, callbacks)
-- This has to be done first, as it will impact geometry related props.
if props.titlebars_enabled and (type(props.titlebars_enabled) ~= "function"
or props.titlebars_enabled(c,props)) then
c:emit_signal("request::titlebars", "rules", {properties=props})
c._request_titlebars_called = true
end
-- Border width will also cause geometry related properties to fail
if props.border_width then
c.border_width = type(props.border_width) == "function" and
props.border_width(c, props) or props.border_width
end
-- Size hints will be re-applied when setting width/height unless it is
-- disabled first
if props.size_hints_honor ~= nil then
c.size_hints_honor = type(props.size_hints_honor) == "function" and props.size_hints_honor(c,props)
or props.size_hints_honor
end
-- Geometry will only work if floating is true, otherwise the "saved"
-- geometry will be restored.
if props.floating ~= nil then
c.floating = type(props.floating) == "function" and props.floating(c,props)
or props.floating
end
-- Before requesting a tag, make sure the screen is right
if props.screen then
c.screen = type(props.screen) == "function" and screen[props.screen(c,props)]
or screen[props.screen]
end
-- Some properties need to be handled first. For example, many properties
-- require that the client is tagged, this isn't yet the case.
for prop, handler in pairs(rules.high_priority_properties) do
local value = props[prop]
if value ~= nil then
if type(value) == "function" then
value = value(c, props)
end
handler(c, value, props)
end
end
-- Make sure the tag is selected before the main rules are called.
-- Otherwise properties like "urgent" or "focus" may fail (if they were
-- overridden by other callbacks).
-- Previously this was done in a second client.manage callback, but caused
-- a race condition where the order of modules being loaded would change
-- the outcome.
c:emit_signal("request::tag", nil, {reason="rules"})
-- By default, rc.lua uses no_overlap+no_offscreen placement. This has to
-- be executed before x/y/width/height/geometry as it would otherwise
-- always override the user specified position with the default rule.
if props.placement then
-- It may be a function, so this one doesn't execute it like others
rules.extra_properties.placement(c, props.placement, props)
end
-- Handle the geometry (since tags and screen are set).
if props.height or props.width or props.x or props.y or props.geometry then
rules.extra_properties.geometry(c, nil, props)
end
-- Apply the remaining properties (after known race conditions are handled).
for property, value in pairs(props) do
if property ~= "focus" and property ~= "shape" and type(value) == "function" then
value = value(c, props)
end
local ignore = rules.high_priority_properties[property] or
rules.delayed_properties[property] or force_ignore[property]
if not ignore then
if rules.extra_properties[property] then
rules.extra_properties[property](c, value, props)
elseif type(c[property]) == "function" then
c[property](c, value)
else
c[property] = value
end
end
end
-- Apply all callbacks.
if callbacks then
for _, callback in pairs(callbacks) do
protected_call(callback, c)
end
end
-- Apply the delayed properties
for prop, handler in pairs(rules.delayed_properties) do
if not force_ignore[prop] then
local value = props[prop]
if value ~= nil then
if type(value) == "function" then
value = value(c, props)
end
handler(c, value, props)
end
end
end
-- Do this at last so we do not erase things done by the focus signal.
if props.focus and (type(props.focus) ~= "function" or props.focus(c)) then
c:emit_signal('request::activate', "rules", {raise=not awesome.startup})
end
end
function rules.execute(...) crules:_execute(...) end
-- TODO v5 deprecate this
function rules.completed_with_payload_callback(c, props, callbacks)
rules.execute(c, props, callbacks)
end
client.connect_signal("manage", rules.apply)
--@DOC_rule_COMMON@
return rules
-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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