490 lines
16 KiB
Lua
490 lines
16 KiB
Lua
---------------------------------------------------------------------------
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--- Layout module for awful.
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--
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-- @author Julien Danjou <julien@danjou.info>
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-- @copyright 2008 Julien Danjou
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-- @module awful.layout
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---------------------------------------------------------------------------
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-- Grab environment we need
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local ipairs = ipairs
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local type = type
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local capi = {
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screen = screen,
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mouse = mouse,
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awesome = awesome,
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client = client,
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tag = tag
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}
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local tag = require("awful.tag")
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local client = require("awful.client")
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local ascreen = require("awful.screen")
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local timer = require("gears.timer")
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local gmath = require("gears.math")
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local gtable = require("gears.table")
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local gdebug = require("gears.debug")
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local protected_call = require("gears.protected_call")
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local function get_screen(s)
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return s and capi.screen[s]
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end
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local layout = {}
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-- Support `table.insert()` to avoid breaking old code.
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local default_layouts = setmetatable({}, {
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__newindex = function(self, key, value)
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assert(key <= #self+1 and key > 0)
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layout.append_default_layout(value)
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end
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})
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layout.suit = require("awful.layout.suit")
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--- The default list of layouts.
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--
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-- The default value is:
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--
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-- awful.layout.suit.floating,
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-- awful.layout.suit.tile,
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-- awful.layout.suit.tile.left,
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-- awful.layout.suit.tile.bottom,
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-- awful.layout.suit.tile.top,
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-- awful.layout.suit.fair,
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-- awful.layout.suit.fair.horizontal,
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-- awful.layout.suit.spiral,
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-- awful.layout.suit.spiral.dwindle,
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-- awful.layout.suit.max,
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-- awful.layout.suit.max.fullscreen,
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-- awful.layout.suit.magnifier,
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-- awful.layout.suit.corner.nw,
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-- awful.layout.suit.corner.ne,
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-- awful.layout.suit.corner.sw,
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-- awful.layout.suit.corner.se,
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--
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-- @field awful.layout.layouts
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--- Return the tag layout index (from `awful.layout.layouts`).
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--
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-- If the layout isn't part of `awful.layout.layouts`, this function returns
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-- nil.
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--
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-- @tparam tag t The tag.
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-- @treturn nil|number The layout index.
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-- @staticfct awful.layout.get_tag_layout_index
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function layout.get_tag_layout_index(t)
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return gtable.hasitem(layout.layouts, t.layout)
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end
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-- This is a special lock used by the arrange function.
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-- This avoids recurring call by emitted signals.
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local arrange_lock = false
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-- Delay one arrange call per screen.
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local delayed_arrange = {}
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--- Get the current layout.
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-- @param screen The screen.
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-- @return The layout function.
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-- @staticfct awful.layout.get
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function layout.get(screen)
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screen = screen or capi.mouse.screen
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if not screen then return nil end
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local t = get_screen(screen).selected_tag
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return tag.getproperty(t, "layout") or layout.suit.floating
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end
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--- Change the layout of the current tag.
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-- @param i Relative index.
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-- @param s The screen.
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-- @param[opt] layouts A table of layouts.
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-- @staticfct awful.layout.inc
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function layout.inc(i, s, layouts)
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if type(i) == "table" then
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-- Older versions of this function had arguments (layouts, i, s), but
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-- this was changed so that 'layouts' can be an optional parameter
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gdebug.deprecate("Use awful.layout.inc(increment, screen, layouts) instead"..
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" of awful.layout.inc(layouts, increment, screen)", {deprecated_in=5})
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layouts, i, s = i, s, layouts
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end
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s = get_screen(s or ascreen.focused())
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local t = s.selected_tag
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if not t then return end
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layouts = layouts or t.layouts or {}
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if #layouts == 0 then
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layouts = layout.layouts
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end
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local cur_l = layout.get(s)
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-- First try to match the object
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local cur_idx = gtable.find_first_key(
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layouts, function(_, v) return v == cur_l or cur_l._type == v end, true
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)
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-- Safety net: handle cases where another reference of the layout
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-- might be given (e.g. when (accidentally) cloning it).
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cur_idx = cur_idx or gtable.find_first_key(
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layouts, function(_, v) return v.name == cur_l.name end, true
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)
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-- Trying to come up with some kind of fallback layouts to iterate would
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-- never produce a result the user expect, so if there is nothing to
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-- iterate over, do not iterate.
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if not cur_idx then return end
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local newindex = gmath.cycle(#layouts, cur_idx + i)
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layout.set(layouts[newindex], t)
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end
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--- Set the layout function of the current tag.
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-- @param _layout Layout name.
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-- @tparam[opt=mouse.screen.selected_tag] tag t The tag to modify.
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-- @staticfct awful.layout.set
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function layout.set(_layout, t)
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t = t or capi.mouse.screen.selected_tag
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t.layout = _layout
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end
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--- Get the layout parameters used for the screen
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--
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-- This should give the same result as "arrange", but without the "geometries"
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-- parameter, as this is computed during arranging.
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--
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-- If `t` is given, `screen` is ignored, if none are given, the mouse screen is
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-- used.
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--
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-- @tparam[opt] tag t The tag to query
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-- @param[opt] screen The screen
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-- @treturn table A table with the workarea (x, y, width, height), the screen
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-- geometry (x, y, width, height), the clients, the screen and sometime, a
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-- "geometries" table with client as keys and geometry as value
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-- @staticfct awful.layout.parameters
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function layout.parameters(t, screen)
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screen = get_screen(screen)
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t = t or screen.selected_tag
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screen = get_screen(t and t.screen or 1)
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local p = {}
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local clients = client.tiled(screen)
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local gap_single_client = true
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if(t and t.gap_single_client ~= nil) then
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gap_single_client = t.gap_single_client
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end
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local useless_gap = 0
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if t then
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local skip_gap = layout.get(screen).skip_gap or function(nclients)
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return nclients < 2
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end
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if gap_single_client or not skip_gap(#clients, t) then
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useless_gap = t.gap
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end
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end
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p.workarea = screen:get_bounding_geometry {
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honor_padding = true,
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honor_workarea = true,
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margins = useless_gap,
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}
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p.geometry = screen.geometry
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p.clients = clients
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p.screen = screen.index
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p.padding = screen.padding
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p.useless_gap = useless_gap
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return p
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end
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--- Arrange a screen using its current layout.
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-- @param screen The screen to arrange.
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-- @staticfct awful.layout.arrange
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function layout.arrange(screen)
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screen = get_screen(screen)
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if not screen or delayed_arrange[screen] then return end
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delayed_arrange[screen] = true
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timer.delayed_call(function()
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if not screen.valid then
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-- Screen was removed
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delayed_arrange[screen] = nil
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return
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end
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if arrange_lock then return end
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arrange_lock = true
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-- protected call to ensure that arrange_lock will be reset
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protected_call(function()
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local p = layout.parameters(nil, screen)
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local useless_gap = p.useless_gap
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p.geometries = setmetatable({}, {__mode = "k"})
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layout.get(screen).arrange(p)
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for c, g in pairs(p.geometries) do
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g.width = math.max(1, g.width - c.border_width * 2 - useless_gap * 2)
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g.height = math.max(1, g.height - c.border_width * 2 - useless_gap * 2)
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g.x = g.x + useless_gap
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g.y = g.y + useless_gap
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c:geometry(g)
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end
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end)
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arrange_lock = false
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delayed_arrange[screen] = nil
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screen:emit_signal("arrange")
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end)
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end
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--- Append a layout to the list of default tag layouts.
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--
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-- @staticfct awful.layout.append_default_layout
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-- @tparam layout to_add A valid tag layout.
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-- @see awful.layout.layouts
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function layout.append_default_layout(to_add)
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rawset(default_layouts, #default_layouts+1, to_add)
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capi.tag.emit_signal("property::layouts")
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end
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--- Remove a layout from the list of default layouts.
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--
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-- @DOC_text_awful_layout_remove_EXAMPLE@
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--
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-- @staticfct awful.layout.remove_default_layout
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-- @tparam layout to_remove A valid tag layout.
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-- @treturn boolean True if the layout was found and removed.
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-- @see awful.layout.layouts
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function layout.remove_default_layout(to_remove)
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local ret, found = false, true
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-- Remove all instances, just in case.
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while found do
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found = false
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for k, l in ipairs(default_layouts) do
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if l == to_remove then
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table.remove(default_layouts, k)
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ret, found = true, true
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break
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end
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end
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end
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return ret
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end
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--- Append many layouts to the list of default tag layouts.
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--
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-- @staticfct awful.layout.append_default_layouts
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-- @tparam table layouts A table of valid tag layout.
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-- @see awful.layout.layouts
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function layout.append_default_layouts(layouts)
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for _, l in ipairs(layouts) do
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rawset(default_layouts, #default_layouts+1, l)
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end
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end
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--- Get the current layout name.
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-- @param _layout The layout.
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-- @return The layout name.
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-- @staticfct awful.layout.getname
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function layout.getname(_layout)
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_layout = _layout or layout.get()
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return _layout.name
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end
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local function arrange_prop_nf(obj)
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if not client.object.get_floating(obj) then
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layout.arrange(obj.screen)
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end
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end
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local function arrange_prop(obj) layout.arrange(obj.screen) end
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capi.client.connect_signal("property::size_hints_honor", arrange_prop_nf)
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capi.client.connect_signal("property::struts", arrange_prop)
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capi.client.connect_signal("property::minimized", arrange_prop_nf)
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capi.client.connect_signal("property::sticky", arrange_prop_nf)
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capi.client.connect_signal("property::fullscreen", arrange_prop_nf)
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capi.client.connect_signal("property::maximized_horizontal", arrange_prop_nf)
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capi.client.connect_signal("property::maximized_vertical", arrange_prop_nf)
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capi.client.connect_signal("property::border_width", arrange_prop_nf)
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capi.client.connect_signal("property::hidden", arrange_prop_nf)
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capi.client.connect_signal("property::floating", arrange_prop)
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capi.client.connect_signal("property::geometry", arrange_prop_nf)
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capi.client.connect_signal("property::screen", function(c, old_screen)
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if old_screen then
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layout.arrange(old_screen)
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end
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layout.arrange(c.screen)
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end)
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local function arrange_tag(t)
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layout.arrange(t.screen)
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end
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capi.tag.connect_signal("property::master_width_factor", arrange_tag)
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capi.tag.connect_signal("property::master_count", arrange_tag)
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capi.tag.connect_signal("property::column_count", arrange_tag)
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capi.tag.connect_signal("property::layout", arrange_tag)
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capi.tag.connect_signal("property::windowfact", arrange_tag)
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capi.tag.connect_signal("property::selected", arrange_tag)
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capi.tag.connect_signal("property::activated", arrange_tag)
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capi.tag.connect_signal("property::useless_gap", arrange_tag)
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capi.tag.connect_signal("property::master_fill_policy", arrange_tag)
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capi.tag.connect_signal("tagged", arrange_tag)
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capi.screen.connect_signal("property::workarea", layout.arrange)
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capi.screen.connect_signal("padding", layout.arrange)
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capi.client.connect_signal("focus", function(c)
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local screen = c.screen
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if screen and layout.get(screen).need_focus_update then
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layout.arrange(screen)
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end
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end)
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capi.client.connect_signal("raised", function(c) layout.arrange(c.screen) end)
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capi.client.connect_signal("lowered", function(c) layout.arrange(c.screen) end)
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capi.client.connect_signal("list", function()
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for screen in capi.screen do
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layout.arrange(screen)
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end
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end)
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--- Default handler for `request::geometry` signals for tiled clients with
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-- the "mouse.move" context.
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-- @tparam client c The client
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-- @tparam string context The context
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-- @tparam table hints Additional hints
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-- @signalhandler awful.layout.move_handler
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function layout.move_handler(c, context, hints) --luacheck: no unused args
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-- Quit if it isn't a mouse.move on a tiled layout, that's handled elsewhere
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if c.floating then return end
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if context ~= "mouse.move" then return end
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if capi.mouse.screen ~= c.screen then
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c.screen = capi.mouse.screen
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end
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local l = c.screen.selected_tag and c.screen.selected_tag.layout or nil
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if l == layout.suit.floating then return end
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local c_u_m = capi.mouse.current_client
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if c_u_m and not c_u_m.floating then
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if c_u_m ~= c then
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c:swap(c_u_m)
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end
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end
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end
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capi.client.connect_signal("request::geometry", layout.move_handler)
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-- When a screen is moved, make (floating) clients follow it
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capi.screen.connect_signal("property::geometry", function(s, old_geom)
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local geom = s.geometry
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local xshift = geom.x - old_geom.x
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local yshift = geom.y - old_geom.y
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for _, c in ipairs(capi.client.get(s)) do
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local cgeom = c:geometry()
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c:geometry({
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x = cgeom.x + xshift,
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y = cgeom.y + yshift
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})
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end
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end)
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local init_layouts
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init_layouts = function()
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capi.tag.emit_signal("request::default_layouts")
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capi.tag.disconnect_signal("new", init_layouts)
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-- Fallback.
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if #default_layouts == 0 then
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layout.append_default_layouts({
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layout.suit.floating,
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layout.suit.tile,
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layout.suit.tile.left,
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layout.suit.tile.bottom,
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layout.suit.tile.top,
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layout.suit.fair,
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layout.suit.fair.horizontal,
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layout.suit.spiral,
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layout.suit.spiral.dwindle,
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layout.suit.max,
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layout.suit.max.fullscreen,
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layout.suit.magnifier,
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layout.suit.corner.nw,
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layout.suit.corner.ne,
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layout.suit.corner.sw,
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layout.suit.corner.se,
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})
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end
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init_layouts = nil
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end
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-- "new" is emited before "activate", do it should be the very last opportunity
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-- generate the list of default layout. With dynamic tag, this can happen later
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-- than the first event loop iteration.
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capi.tag.connect_signal("new", init_layouts)
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-- Intercept the calls to `layouts` to both lazyload then and emit the proper
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-- signals.
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local mt = {
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__index = function(_, key)
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if key == "layouts" then
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-- Lazy initialization to *at least* attempt to give modules a
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-- chance to load before calling `request::default_layouts`. Note
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-- that the old `rc.lua` called `awful.layout.layouts` in the global
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-- context. If there was some module `require()` later in the code,
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-- they will not get the signal.
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if init_layouts then
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init_layouts()
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end
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return default_layouts
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end
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end,
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__newindex = function(_, key, value)
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if key == "layouts" then
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assert(type(value) == "table", "`awful.layout.layouts` needs a table.")
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-- Do not ask for layouts if they were already provided.
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if init_layouts then
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gdebug.print_warning(
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"`awful.layout.layouts` was set before `request::default_layouts` could "..
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"be called. Please use `awful.layout.append_default_layouts` to "..
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" avoid this problem"
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)
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capi.tag.disconnect_signal("new", init_layouts)
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init_layouts = nil
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elseif #default_layouts > 0 then
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gdebug.print_warning(
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"`awful.layout.layouts` was set after `request::default_layouts` was "..
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"used to get the layouts. This is probably an accident. Use "..
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"`awful.layout.remove_default_layout` to get rid of this warning."
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)
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end
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default_layouts = value
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else
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rawset(layout, key, value)
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end
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end
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}
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return setmetatable(layout, mt)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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