117 lines
3.3 KiB
Lua
117 lines
3.3 KiB
Lua
--- find the best region for the area-like object
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-- @param c area-like object - table with properties x, y, width, and height
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-- @param regions array of area-like objects
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-- @return the index of the best region
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local function find_region(c, regions)
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local choice = 1
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local choice_value = nil
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local c_area = c.width * c.height
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for i, a in ipairs(regions) do
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local x_cap = max(0, min(c.x + c.width, a.x + a.width) - max(c.x, a.x))
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local y_cap = max(0, min(c.y + c.height, a.y + a.height) - max(c.y, a.y))
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local cap = x_cap * y_cap
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-- -- a cap b / a cup b
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-- local cup = c_area + a.width * a.height - cap
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-- if cup > 0 then
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-- local itx_ratio = cap / cup
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-- if choice_value == nil or choice_value < itx_ratio then
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-- choice_value = itx_ratio
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-- choice = i
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-- end
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-- end
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-- a cap b
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if choice_value == nil or choice_value < cap then
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choice = i
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choice_value = cap
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end
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end
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return choice
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end
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function do_arrange(p, priv)
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local wa = p.workarea
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local cls = p.clients
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local regions = priv.regions
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if #regions == 0 then return end
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for i, c in ipairs(cls) do
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if c.floating then
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print("Ignore client " .. tostring(c))
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else
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if c.machi_region == nil then
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c.machi_region = find_region(c, regions)
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elseif c.machi_region > #regions then
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c.machi_region = #regions
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elseif c.machi_region <= 1 then
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c.machi_region = 1
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end
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local region = c.machi_region
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p.geometries[c] = {
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x = regions[region].x,
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y = regions[region].y,
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width = regions[region].width,
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height = regions[region].height,
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}
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print("Put client " .. tostring(c) .. " to region " .. region)
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end
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end
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end
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function create()
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local priv = { regions = {} }
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local function set_regions(regions)
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priv.regions = regions
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end
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local function get_regions()
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return priv.regions
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end
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-- move the closest region regardingly to the center distance
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local function resize_handler(c, context, h)
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if context ~= "mouse.move" then return end
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if #priv.regions == 0 then return end
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local center_x = h.x + h.width / 2
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local center_y = h.y + h.height / 2
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local choice = 1
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local choice_value = nil
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for i, r in ipairs(priv.regions) do
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local r_x = r.x + r.width / 2
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local r_y = r.y + r.height / 2
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local dis = (r_x - center_x) * (r_x - center_x) + (r_y - center_y) * (r_y - center_y)
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if choice_value == nil or choice_value > dis then
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choice = i
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choice_value = dis
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end
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end
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if c.machi_region ~= choice then
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c.machi_region = choice
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c.x = priv.regions[choice].x
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c.y = priv.regions[choice].y
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c.width = priv.regions[choice].width
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c.height = priv.regions[choice].height
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end
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end
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return {
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arrange = function (p) do_arrange(p, priv) end,
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get_region_count = function () return #priv.regions end,
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set_regions = set_regions,
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get_regions = get_regions,
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resize_handler = resize_handler,
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}
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end
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return {
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create = create,
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find_region = find_region,
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}
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