137 lines
4.2 KiB
Lua
137 lines
4.2 KiB
Lua
---------------------------------------------------------------------------
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--- Mouse snapping related functions
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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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-- @release @AWESOME_VERSION@
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-- @submodule awful.mouse
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---------------------------------------------------------------------------
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local aclient = require("awful.client")
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local resize = require("awful.mouse.resize")
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local capi = {
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root = root,
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mouse = mouse,
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screen = screen,
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client = client,
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mousegrabber = mousegrabber,
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}
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local module = {
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default_distance = 8
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}
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local function snap_outside(g, sg, snap)
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if g.x < snap + sg.x + sg.width and g.x > sg.x + sg.width then
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g.x = sg.x + sg.width
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elseif g.x + g.width < sg.x and g.x + g.width > sg.x - snap then
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g.x = sg.x - g.width
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end
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if g.y < snap + sg.y + sg.height and g.y > sg.y + sg.height then
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g.y = sg.y + sg.height
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elseif g.y + g.height < sg.y and g.y + g.height > sg.y - snap then
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g.y = sg.y - g.height
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end
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return g
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end
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local function snap_inside(g, sg, snap)
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local edgev = 'none'
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local edgeh = 'none'
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if math.abs(g.x) < snap + sg.x and g.x > sg.x then
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edgev = 'left'
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g.x = sg.x
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elseif math.abs((sg.x + sg.width) - (g.x + g.width)) < snap then
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edgev = 'right'
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g.x = sg.x + sg.width - g.width
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end
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if math.abs(g.y) < snap + sg.y and g.y > sg.y then
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edgeh = 'top'
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g.y = sg.y
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elseif math.abs((sg.y + sg.height) - (g.y + g.height)) < snap then
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edgeh = 'bottom'
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g.y = sg.y + sg.height - g.height
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end
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-- What is the dominant dimension?
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if g.width > g.height then
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return g, edgeh
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else
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return g, edgev
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end
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end
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--- Snap a client to the closest client or screen edge.
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-- @param c The client to snap.
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-- @param snap The pixel to snap clients.
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-- @param x The client x coordinate.
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-- @param y The client y coordinate.
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-- @param fixed_x True if the client isn't allowed to move in the x direction.
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-- @param fixed_y True if the client isn't allowed to move in the y direction.
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function module.snap(c, snap, x, y, fixed_x, fixed_y)
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snap = snap or module.default_distance
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c = c or capi.client.focus
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local cur_geom = c:geometry()
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local geom = c:geometry()
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geom.width = geom.width + (2 * c.border_width)
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geom.height = geom.height + (2 * c.border_width)
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local edge
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geom.x = x or geom.x
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geom.y = y or geom.y
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geom, edge = snap_inside(geom, capi.screen[c.screen].geometry, snap)
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geom = snap_inside(geom, capi.screen[c.screen].workarea, snap)
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-- Allow certain windows to snap to the edge of the workarea.
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-- Only allow docking to workarea for consistency/to avoid problems.
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if c.dockable then
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local struts = c:struts()
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struts['left'] = 0
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struts['right'] = 0
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struts['top'] = 0
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struts['bottom'] = 0
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if edge ~= "none" and c.floating then
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if edge == "left" or edge == "right" then
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struts[edge] = cur_geom.width
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elseif edge == "top" or edge == "bottom" then
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struts[edge] = cur_geom.height
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end
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end
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c:struts(struts)
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end
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geom.x = geom.x - (2 * c.border_width)
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geom.y = geom.y - (2 * c.border_width)
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for _, snapper in ipairs(aclient.visible(c.screen)) do
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if snapper ~= c then
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geom = snap_outside(geom, snapper:geometry(), snap)
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end
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end
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geom.width = geom.width - (2 * c.border_width)
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geom.height = geom.height - (2 * c.border_width)
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geom.x = geom.x + (2 * c.border_width)
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geom.y = geom.y + (2 * c.border_width)
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-- It's easiest to undo changes afterwards if they're not allowed
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if fixed_x then geom.x = cur_geom.x end
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if fixed_y then geom.y = cur_geom.y end
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return geom
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end
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-- Enable edge snapping
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resize.add_move_callback(function(c, geo, args)
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if args and (args.snap == nil or args.snap) then
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local ngeo = module.snap(c, args.snap, geo.x, geo.y)
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ngeo.x = ngeo.x + (2 * c.border_width)
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ngeo.y = ngeo.y + (2 * c.border_width)
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return ngeo
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end
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end, "mouse.move")
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return setmetatable(module, {__call = function(_, ...) return module.snap(...) end})
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