239 lines
7.6 KiB
Lua
239 lines
7.6 KiB
Lua
---------------------------------------------------------------------------
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-- @author Julien Danjou <julien@danjou.info>
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-- @copyright 2008 Julien Danjou
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-- @release v3.4.10
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---------------------------------------------------------------------------
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-- Grab environment we need
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local ipairs = ipairs
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local pairs = pairs
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local math = math
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local table = table
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local capi =
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{
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screen = screen,
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mouse = mouse,
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client = client
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}
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local client = require("awful.client")
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local layout = require("awful.layout")
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--- Places client according to special criteria.
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module("awful.placement")
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-- Check if an area intersect another area.
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-- @param a The area.
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-- @param b The other area.
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-- @return True if they intersect, false otherwise.
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local function area_intersect_area(a, b)
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return (b.x < a.x + a.width
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and b.x + b.width > a.x
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and b.y < a.y + a.height
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and b.y + b.height > a.y)
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end
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-- Get the intersect area between a and b.
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-- @param a The area.
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-- @param b The other area.
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-- @return The intersect area.
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local function area_intersect_area_get(a, b)
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local g = {}
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g.x = math.max(a.x, b.x)
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g.y = math.max(a.y, b.y)
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g.width = math.min(a.x + a.width, b.x + b.width) - g.x
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g.height = math.min(a.y + a.height, b.y + b.height) - g.y
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return g
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end
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-- Remove an area from a list, splitting the space between several area that
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-- can overlap.
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-- @param areas Table of areas.
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-- @param elem Area to remove.
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-- @return The new area list.
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local function area_remove(areas, elem)
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for i = #areas, 1, -1 do
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-- Check if the 'elem' intersect
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if area_intersect_area(areas[i], elem) then
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-- It does? remove it
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local r = table.remove(areas, i)
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local inter = area_intersect_area_get(r, elem)
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if inter.x > r.x then
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table.insert(areas, {
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x = r.x,
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y = r.y,
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width = inter.x - r.x,
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height = r.height
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})
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end
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if inter.y > r.y then
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table.insert(areas, {
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x = r.x,
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y = r.y,
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width = r.width,
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height = inter.y - r.y
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})
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end
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if inter.x + inter.width < r.x + r.width then
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table.insert(areas, {
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x = inter.x + inter.width,
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y = r.y,
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width = (r.x + r.width) - (inter.x + inter.width),
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height = r.height
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})
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end
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if inter.y + inter.height < r.y + r.height then
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table.insert(areas, {
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x = r.x,
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y = inter.y + inter.height,
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width = r.width,
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height = (r.y + r.height) - (inter.y + inter.height)
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})
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end
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end
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end
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return areas
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end
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--- Place the client so no part of it will be outside the screen.
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-- @param c The client.
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-- @return The new client geometry.
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function no_offscreen(c)
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local c = c or capi.client.focus
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local geometry = c:geometry()
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local border = c.border_width
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local screen_geometry = capi.screen[c.screen].workarea
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if geometry.x + geometry.width + 2*border > screen_geometry.x + screen_geometry.width then
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geometry.x = screen_geometry.x + screen_geometry.width - geometry.width
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elseif geometry.x < screen_geometry.x then
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geometry.x = screen_geometry.x
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end
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if geometry.y + geometry.height + border > screen_geometry.y + screen_geometry.height then
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geometry.y = screen_geometry.y + screen_geometry.height - geometry.height
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elseif geometry.y < screen_geometry.y then
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geometry.y = screen_geometry.y
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end
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c:geometry(geometry)
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end
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--- Place the client where there's place available with minimum overlap.
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-- @param c The client.
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function no_overlap(c)
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local cls = client.visible(c.screen)
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local curlay = layout.get()
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local areas = { capi.screen[c.screen].workarea }
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local geometry = c:geometry()
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for i, cl in pairs(cls) do
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if cl ~= c and cl.type ~= "desktop" and (client.floating.get(cl) or curlay == layout.suit.floating) then
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areas = area_remove(areas, cl:geometry())
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end
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end
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-- Look for available space
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local found = false
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local new = { x = geometry.x, y = geometry.y, width = 0, height = 0 }
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for i, r in ipairs(areas) do
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if r.width >= geometry.width
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and r.height >= geometry.height
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and r.width * r.height > new.width * new.height then
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found = true
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new = r
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-- Check if the client's current position is available
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-- and prefer that one (why move it around pointlessly?)
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if geometry.x >= r.x
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and geometry.y >= r.y
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and geometry.x + geometry.width <= r.x + r.width
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and geometry.y + geometry.height <= r.y + r.height then
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new.x = geometry.x
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new.y = geometry.y
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end
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end
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end
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-- We did not find an area with enough space for our size:
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-- just take the biggest available one and go in
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if not found then
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for i, r in ipairs(areas) do
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if r.width * r.height > new.width * new.height then
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new = r
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end
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end
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end
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-- Restore height and width
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new.width = geometry.width
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new.height = geometry.height
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return c:geometry(new)
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end
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--- Place the client under the mouse.
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-- @param c The client.
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-- @return The new client geometry.
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function under_mouse(c)
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local c = c or capi.client.focus
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local c_geometry = c:geometry()
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local m_coords = capi.mouse.coords()
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return c:geometry({ x = m_coords.x - c_geometry.width / 2,
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y = m_coords.y - c_geometry.height / 2 })
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end
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--- Place the client centered with respect to a parent or the clients screen.
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-- @param c The client.
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-- @param p The parent (optional, nil for screen centering).
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-- @return The new client geometry.
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function centered(c, p)
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local c = c or capi.client.focus
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local c_geometry = c:geometry()
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local s_geometry
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if p then
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s_geometry = p:geometry()
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else
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s_geometry = capi.screen[c.screen].geometry
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end
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return c:geometry({ x = s_geometry.x + (s_geometry.width - c_geometry.width) / 2,
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y = s_geometry.y + (s_geometry.height - c_geometry.height) / 2 })
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end
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--- Place the client centered on the horizontal axis with respect to a parent or the clients screen.
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-- @param c The client.
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-- @param p The parent (optional, nil for screen centering).
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-- @return The new client geometry.
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function center_horizontal(c, p)
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local c = c or capi.client.focus
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local c_geometry = c:geometry()
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local s_geometry
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if p then
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s_geometry = p:geometry()
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else
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s_geometry = capi.screen[c.screen].geometry
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end
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return c:geometry({ x = s_geometry.x + (s_geometry.width - c_geometry.width) / 2 })
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end
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--- Place the client centered on the vertical axis with respect to a parent or the clients screen.
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-- @param c The client.
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-- @param p The parent (optional, nil for screen centering).
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-- @return The new client geometry.
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function center_vertical(c, p)
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local c = c or capi.client.focus
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local c_geometry = c:geometry()
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local s_geometry
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if p then
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s_geometry = p:geometry()
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else
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s_geometry = capi.screen[c.screen].geometry
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end
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return c:geometry({ y = s_geometry.y + (s_geometry.height - c_geometry.height) / 2 })
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end
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
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