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----------------------------------------------------------------------------
---- Layout module for awful
---
--- @author Julien Danjou <julien@danjou.info>
--- @copyright 2008 Julien Danjou
--- @module awful.layout
----------------------------------------------------------------------------
-
--- Grab environment we need
-local ipairs = ipairs
-local type = type
-local util = require("awful.util")
-local capi = {
- screen = screen,
- mouse = mouse,
- awesome = awesome,
- client = client,
- tag = tag
-}
-local tag = require("awful.tag")
-local client = require("awful.client")
-local ascreen = require("awful.screen")
-local timer = require("gears.timer")
-
-local function get_screen(s)
- return s and capi.screen[s]
-end
-
-local layout = {}
-
-layout.suit = require("awful.layout.suit")
-
-layout.layouts = {
- layout.suit.floating,
- layout.suit.tile,
- layout.suit.tile.left,
- layout.suit.tile.bottom,
- layout.suit.tile.top,
- layout.suit.fair,
- layout.suit.fair.horizontal,
- layout.suit.spiral,
- layout.suit.spiral.dwindle,
- layout.suit.max,
- layout.suit.max.fullscreen,
- layout.suit.magnifier,
- layout.suit.corner.nw,
- layout.suit.corner.ne,
- layout.suit.corner.sw,
- layout.suit.corner.se,
-}
-
---- The default list of layouts.
---
--- The default value is:
---
--- awful.layout.suit.floating,
--- awful.layout.suit.tile,
--- awful.layout.suit.tile.left,
--- awful.layout.suit.tile.bottom,
--- awful.layout.suit.tile.top,
--- awful.layout.suit.fair,
--- awful.layout.suit.fair.horizontal,
--- awful.layout.suit.spiral,
--- awful.layout.suit.spiral.dwindle,
--- awful.layout.suit.max,
--- awful.layout.suit.max.fullscreen,
--- awful.layout.suit.magnifier,
--- awful.layout.suit.corner.nw,
--- awful.layout.suit.corner.ne,
--- awful.layout.suit.corner.sw,
--- awful.layout.suit.corner.se,
---
--- @field layout.layouts
-
-
--- This is a special lock used by the arrange function.
--- This avoids recurring call by emitted signals.
-local arrange_lock = false
--- Delay one arrange call per screen.
-local delayed_arrange = {}
-
---- Get the current layout.
--- @param screen The screen.
--- @return The layout function.
-function layout.get(screen)
- screen = screen or capi.mouse.screen
- local t = get_screen(screen).selected_tag
- return tag.getproperty(t, "layout") or layout.suit.floating
-end
-
---- Change the layout of the current tag.
--- @param i Relative index.
--- @param s The screen.
--- @param[opt] layouts A table of layouts.
-function layout.inc(i, s, layouts)
- if type(i) == "table" then
- -- Older versions of this function had arguments (layouts, i, s), but
- -- this was changed so that 'layouts' can be an optional parameter
- layouts, i, s = i, s, layouts
- end
- s = get_screen(s or ascreen.focused())
- local t = s.selected_tag
- layouts = layouts or layout.layouts
- if t then
- local curlayout = layout.get(s)
- local curindex
- for k, v in ipairs(layouts) do
- if v == curlayout or curlayout._type == v then
- curindex = k
- break
- end
- end
- if not curindex then
- -- Safety net: handle cases where another reference of the layout
- -- might be given (e.g. when (accidentally) cloning it).
- for k, v in ipairs(layouts) do
- if v.name == curlayout.name then
- curindex = k
- break
- end
- end
- end
- if curindex then
- local newindex = util.cycle(#layouts, curindex + i)
- layout.set(layouts[newindex], t)
- end
- end
-end
-
---- Set the layout function of the current tag.
--- @param _layout Layout name.
--- @tparam[opt=mouse.screen.selected_tag] tag t The tag to modify.
-function layout.set(_layout, t)
- t = t or capi.mouse.screen.selected_tag
- t.layout = _layout
-end
-
---- Get the layout parameters used for the screen
---
--- This should give the same result as "arrange", but without the "geometries"
--- parameter, as this is computed during arranging.
---
--- If `t` is given, `screen` is ignored, if none are given, the mouse screen is
--- used.
---
--- @tparam[opt] tag t The tag to query
--- @param[opt] screen The screen
--- @treturn table A table with the workarea (x, y, width, height), the screen
--- geometry (x, y, width, height), the clients, the screen and sometime, a
--- "geometries" table with client as keys and geometry as value
-function layout.parameters(t, screen)
- screen = get_screen(screen)
- t = t or screen.selected_tag
-
- screen = get_screen(t and t.screen or 1)
-
- local p = {}
-
- local clients = client.tiled(screen)
- local gap_single_client = true
-
- if(t and t.gap_single_client ~= nil) then
- gap_single_client = t.gap_single_client
- end
-
- local min_clients = gap_single_client and 1 or 2
- local useless_gap = t and (#clients >= min_clients and t.gap or 0) or 0
-
- p.workarea = screen:get_bounding_geometry {
- honor_padding = true,
- honor_workarea = true,
- margins = useless_gap,
- }
-
- p.geometry = screen.geometry
- p.clients = clients
- p.screen = screen.index
- p.padding = screen.padding
- p.useless_gap = useless_gap
-
- return p
-end
-
---- Arrange a screen using its current layout.
--- @param screen The screen to arrange.
-function layout.arrange(screen)
- screen = get_screen(screen)
- if not screen or delayed_arrange[screen] then return end
- delayed_arrange[screen] = true
-
- timer.delayed_call(function()
- if not screen.valid then
- -- Screen was removed
- delayed_arrange[screen] = nil
- return
- end
- if arrange_lock then return end
- arrange_lock = true
-
- local p = layout.parameters(nil, screen)
-
- local useless_gap = p.useless_gap
-
- p.geometries = setmetatable({}, {__mode = "k"})
- layout.get(screen).arrange(p)
- for c, g in pairs(p.geometries) do
- g.width = math.max(1, g.width - c.border_width * 2 - useless_gap * 2)
- g.height = math.max(1, g.height - c.border_width * 2 - useless_gap * 2)
- g.x = g.x + useless_gap
- g.y = g.y + useless_gap
- c:geometry(g)
- end
- arrange_lock = false
- delayed_arrange[screen] = nil
-
- screen:emit_signal("arrange")
- end)
-end
-
---- Get the current layout name.
--- @param _layout The layout.
--- @return The layout name.
-function layout.getname(_layout)
- _layout = _layout or layout.get()
- return _layout.name
-end
-
-local function arrange_prop_nf(obj)
- if not client.object.get_floating(obj) then
- layout.arrange(obj.screen)
- end
-end
-
-local function arrange_prop(obj) layout.arrange(obj.screen) end
-
-capi.client.connect_signal("property::size_hints_honor", arrange_prop_nf)
-capi.client.connect_signal("property::struts", arrange_prop)
-capi.client.connect_signal("property::minimized", arrange_prop_nf)
-capi.client.connect_signal("property::sticky", arrange_prop_nf)
-capi.client.connect_signal("property::fullscreen", arrange_prop_nf)
-capi.client.connect_signal("property::maximized_horizontal", arrange_prop_nf)
-capi.client.connect_signal("property::maximized_vertical", arrange_prop_nf)
-capi.client.connect_signal("property::border_width", arrange_prop_nf)
-capi.client.connect_signal("property::hidden", arrange_prop_nf)
-capi.client.connect_signal("property::floating", arrange_prop)
-capi.client.connect_signal("property::geometry", arrange_prop_nf)
-capi.client.connect_signal("property::screen", function(c, old_screen)
- if old_screen then
- layout.arrange(old_screen)
- end
- layout.arrange(c.screen)
-end)
-
-local function arrange_tag(t)
- layout.arrange(t.screen)
-end
-
-capi.tag.connect_signal("property::master_width_factor", arrange_tag)
-capi.tag.connect_signal("property::master_count", arrange_tag)
-capi.tag.connect_signal("property::column_count", arrange_tag)
-capi.tag.connect_signal("property::layout", arrange_tag)
-capi.tag.connect_signal("property::windowfact", arrange_tag)
-capi.tag.connect_signal("property::selected", arrange_tag)
-capi.tag.connect_signal("property::activated", arrange_tag)
-capi.tag.connect_signal("property::useless_gap", arrange_tag)
-capi.tag.connect_signal("property::master_fill_policy", arrange_tag)
-capi.tag.connect_signal("tagged", arrange_tag)
-
-capi.screen.connect_signal("property::workarea", layout.arrange)
-capi.screen.connect_signal("padding", layout.arrange)
-
-capi.client.connect_signal("raised", function(c) layout.arrange(c.screen) end)
-capi.client.connect_signal("lowered", function(c) layout.arrange(c.screen) end)
-capi.client.connect_signal("list", function()
- for screen in capi.screen do
- layout.arrange(screen)
- end
- end)
-
---- Default handler for `request::geometry` signals for tiled clients with
--- the "mouse.move" context.
--- @tparam client c The client
--- @tparam string context The context
--- @tparam table hints Additional hints
-function layout.move_handler(c, context, hints) --luacheck: no unused args
- -- Quit if it isn't a mouse.move on a tiled layout, that's handled elsewhere
- if c.floating then return end
- if context ~= "mouse.move" then return end
-
- if capi.mouse.screen ~= c.screen then
- c.screen = capi.mouse.screen
- end
-
- local l = c.screen.selected_tag and c.screen.selected_tag.layout or nil
- if l == layout.suit.floating then return end
-
- local c_u_m = capi.mouse.current_client
- if c_u_m and not c_u_m.floating then
- if c_u_m ~= c then
- c:swap(c_u_m)
- end
- end
-end
-
-capi.client.connect_signal("request::geometry", layout.move_handler)
-
--- When a screen is moved, make (floating) clients follow it
-capi.screen.connect_signal("property::geometry", function(s, old_geom)
- local geom = s.geometry
- local xshift = geom.x - old_geom.x
- local yshift = geom.y - old_geom.y
- for _, c in ipairs(capi.client.get(s)) do
- local cgeom = c:geometry()
- c:geometry({
- x = cgeom.x + xshift,
- y = cgeom.y + yshift
- })
- end
-end)
-
-return layout
-
--- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80