311 lines
10 KiB
Lua
311 lines
10 KiB
Lua
local api = {
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screen = screen,
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awful = require("awful"),
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}
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local ERROR = 2
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local WARNING = 1
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local INFO = 0
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local DEBUG = -1
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local module = {
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log_level = WARNING,
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global_default_cmd = "dw66.",
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allowing_shrinking_by_mouse_moving = false,
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}
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local function log(level, msg)
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if level > module.log_level then
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print(msg)
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end
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end
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local function min(a, b)
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if a < b then return a else return b end
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end
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local function max(a, b)
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if a < b then return b else return a end
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end
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local function get_screen(s)
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return s and api.screen[s]
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end
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api.awful.mouse.resize.add_enter_callback(
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function (c)
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c.full_width_before_move = c.width + c.border_width * 2
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c.full_height_before_move = c.height + c.border_width * 2
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end, 'mouse.move')
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--- 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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local function distance(x1, y1, x2, y2)
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-- use d1
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return math.abs(x1 - x2) + math.abs(y1 - y2)
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end
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local function find_lu(c, regions, rd)
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local lu = nil
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for i, a in ipairs(regions) do
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if rd == nil or (a.x < regions[rd].x + regions[rd].width and a.y < regions[rd].y + regions[rd].height) then
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if lu == nil or distance(c.x, c.y, a.x, a.y) < distance(c.x, c.y, regions[lu].x, regions[lu].y) then
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lu = i
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end
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end
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end
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return lu
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end
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local function find_rd(c, regions, lu)
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local x, y
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x = c.x + c.width + (c.border_width or 0)
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y = c.y + c.height + (c.border_width or 0)
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local rd = nil
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for i, a in ipairs(regions) do
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if lu == nil or (a.x + a.width > regions[lu].x and a.y + a.height > regions[lu].y) then
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if rd == nil or distance(x, y, a.x + a.width, a.y + a.height) < distance(x, y, regions[rd].x + regions[rd].width, regions[rd].y + regions[rd].height) then
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rd = i
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end
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end
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end
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return rd
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end
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function module.set_geometry(c, region_lu, region_rd, useless_gap, border_width)
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-- We try to negate the gap of outer layer
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if region_lu ~= nil then
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c.x = region_lu.x - useless_gap
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c.y = region_lu.y - useless_gap
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end
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if region_rd ~= nil then
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c.width = region_rd.x + region_rd.width - c.x + useless_gap - border_width * 2
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c.height = region_rd.y + region_rd.height - c.y + useless_gap - border_width * 2
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end
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end
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function module.create(name, editor, default_cmd)
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local instances = {}
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local get_instance_name
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if type(name) == "function" then
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get_instance_name = name
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else
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get_instance_name = function () return name, true end
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end
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local function get_instance_(tag)
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local name, persistent = get_instance_name(tag)
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if instances[name] == nil then
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instances[name] = {
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cmd = persistent and editor.get_last_cmd(name) or nil,
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regions_cache = {},
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}
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if instances[name].cmd == nil then
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instances[name].cmd = default_cmd
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end
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end
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return instances[name]
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end
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local function get_regions(workarea, tag)
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local instance = get_instance_(tag)
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local cmd = instance.cmd or module.global_default_cmd
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if cmd == nil then return {}, false end
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local key = tostring(workarea.width) .. "x" .. tostring(workarea.height) .. "+" .. tostring(workarea.x) .. "+" .. tostring(workarea.y)
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if instance.regions_cache[key] == nil then
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instance.regions_cache[key] = editor.run_cmd(workarea, cmd)
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end
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return instance.regions_cache[key], cmd:sub(1,1) == "d"
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end
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local function set_cmd(cmd, tag)
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local instance = get_instance_(tag)
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if instance.cmd ~= cmd then
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instance.cmd = cmd
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instance.regions_cache = {}
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end
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end
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local function arrange(p)
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local useless_gap = p.useless_gap
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local wa = get_screen(p.screen).workarea -- get the real workarea without the gap (instead of p.workarea)
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local cls = p.clients
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local regions, draft_mode = get_regions(wa, get_screen(p.screen).selected_tag)
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if #regions == 0 then return end
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if draft_mode then
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for i, c in ipairs(cls) do
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if c.floating then
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else
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local skip = false
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if c.machi_lu ~= nil and c.machi_rd ~= nil and
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c.machi_lu <= #regions and c.machi_rd <= #regions
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then
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if regions[c.machi_lu].x == c.x and
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regions[c.machi_lu].y == c.y and
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regions[c.machi_rd].x + regions[c.machi_rd].width - c.border_width * 2 == c.x + c.width and
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regions[c.machi_rd].y + regions[c.machi_rd].height - c.border_width * 2 == c.y + c.height
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then
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skip = true
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end
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end
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local lu = nil
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local rd = nil
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if not skip then
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log(DEBUG, "Compute regions for " .. (c.name or ("<untitled:" .. tostring(c) .. ">")))
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lu = find_lu(c, regions)
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if lu ~= nil then
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c.x = regions[lu].x
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c.y = regions[lu].y
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rd = find_rd(c, regions, lu)
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end
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end
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if lu ~= nil and rd ~= nil then
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c.machi_lu, c.machi_rd = lu, rd
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p.geometries[c] = {}
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module.set_geometry(p.geometries[c], regions[lu], regions[rd], useless_gap, 0)
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end
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end
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end
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else
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for i, c in ipairs(cls) do
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if c.floating then
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log(DEBUG, "Ignore client " .. tostring(c))
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else
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if c.machi_region ~= nil and
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regions[c.machi_region].x == c.x and
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regions[c.machi_region].y == c.y and
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regions[c.machi_region].width - c.border_width * 2 == c.width and
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regions[c.machi_region].height - c.border_width * 2 == c.height
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then
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else
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log(DEBUG, "Compute regions for " .. (c.name or ("<untitled:" .. tostring(c) .. ">")))
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local region = find_region(c, regions)
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c.machi_region = region
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p.geometries[c] = {}
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module.set_geometry(p.geometries[c], regions[region], regions[region], useless_gap, 0)
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end
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end
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end
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end
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end
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local function resize_handler (c, context, h)
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local workarea = c.screen.workarea
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local regions, draft_mode = get_regions(workarea, c.screen.selected_tag)
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if #regions == 0 then return end
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if draft_mode then
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local lu = find_lu(h, regions)
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local rd = nil
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if lu ~= nil then
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if context == "mouse.move" then
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-- Use the initial width and height since it may change in undesired way.
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local hh = {}
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hh.x = regions[lu].x
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hh.y = regions[lu].y
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hh.width = c.full_width_before_move
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hh.height = c.full_height_before_move
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rd = find_rd(hh, regions, lu)
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if rd ~= nil and not module.allowing_shrinking_by_mouse_moving and
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(regions[rd].x + regions[rd].width - regions[lu].x < c.full_width_before_move or
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regions[rd].y + regions[rd].height - regions[lu].y < c.full_height_before_move) then
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hh.x = regions[rd].x + regions[rd].width - c.full_width_before_move
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hh.y = regions[rd].y + regions[rd].height - c.full_height_before_move
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lu = find_lu(hh, regions, rd)
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end
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else
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local hh = {}
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hh.x = h.x
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hh.y = h.y
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hh.width = h.width
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hh.height = h.height
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hh.border_width = c.border_width
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rd = find_rd(hh, regions, lu)
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end
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if lu ~= nil and rd ~= nil then
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c.machi_lu = lu
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c.machi_rd = rd
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module.set_geometry(c, regions[lu], regions[rd], 0, c.border_width)
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end
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end
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else
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if context ~= "mouse.move" then return end
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local workarea = c.screen.workarea
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local regions = get_regions(workarea, c.screen.selected_tag)
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if #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(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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module.set_geometry(c, regions[choice], regions[choice], 0, c.border_width)
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end
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end
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end
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return {
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name = "machi",
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arrange = arrange,
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resize_handler = resize_handler,
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machi_get_instance_name = get_instance_name,
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machi_set_cmd = set_cmd,
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machi_get_regions = get_regions,
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}
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end
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return module
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