138 lines
4.2 KiB
Lua
138 lines
4.2 KiB
Lua
local M = {}
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local pure = require 'pure'
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local geom = require 'geom'
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local fill_rect = require 'fill_rect'
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--------------------------------------------------------------------------------
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-- compile entire layout
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local reduce_modules_y = function(common, modlist, init_x, width, acc, new)
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if type(new) == "number" then
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acc.next_y = acc.next_y + new
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else
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-- gross...
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local m = modlist[new](common, width, geom.make_point(init_x, acc.next_y))
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local secs = {}
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for i = 1, #m do
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secs[i] = m[i]
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end
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local r = common.compile_module(m.header, m.point, m.width, m.top, table.unpack(secs))
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if m.update_wrapper ~= nil then
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r = pure.map_at("update", m.update_wrapper, r)
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end
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table.insert(acc.fgroups, {update = r.update, static = r.static, dynamic = r.dynamic})
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acc.next_x = math.max(acc.next_x, r.next_x)
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acc.next_y = r.next_y
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end
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return acc
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end
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local reduce_modules_x = function(common, modlist, init_y, acc, x_mods)
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if type(x_mods) == "number" then
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acc.next_x = acc.next_x + x_mods
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else
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local r = pure.reduce(
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pure.partial(reduce_modules_y, common, modlist, acc.next_x, x_mods.width),
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{next_x = acc.next_x, next_y = init_y, fgroups = acc.fgroups},
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x_mods.blocks
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)
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acc.fgroups = r.fgroups
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acc.next_x = r.next_x
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acc.next_y = math.max(acc.next_y, r.next_y)
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end
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return acc
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end
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local arrange_panel_modules = function(common, modlist, point, mods)
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local r = pure.reduce(
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pure.partial(reduce_modules_x, common, modlist, point.y),
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{next_x = point.x, next_y = point.y, fgroups = {}},
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mods
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)
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return {
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point_ul = point,
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width = r.next_x - point.x,
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height = r.next_y - point.y,
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update = pure.map_keys('update', r.fgroups),
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static = pure.map_keys('static', r.fgroups),
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dynamic = pure.map_keys('dynamic', r.fgroups),
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}
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end
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local build_surface = function(common, box, fs)
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local panel_line_thickness = 1
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-- move over by half a pixel so the lines don't need to be antialiased
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local _x = box.corner.x + 0.5
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local _y = box.corner.y + 0.5
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local panel = common.make_panel(_x, _y, box.width, box.height, panel_line_thickness)
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local cs_x = _x - panel_line_thickness * 0.5
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local cs_y = _y - panel_line_thickness * 0.5
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local cs_w = box.width + panel_line_thickness
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local cs_h = box.height + panel_line_thickness
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local cs = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, cs_w, cs_h)
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local cr = cairo_create(cs)
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cairo_translate(cr, -cs_x, -cs_y)
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fill_rect.draw(panel, cr)
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for i = 1, #fs do
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fs[i](cr)
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end
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cairo_destroy(cr)
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return {x = cs_x, y = cs_y, s = cs}
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end
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local reduce_static = function(common, mods, y, acc, panel_mods)
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if type(panel_mods) == "number" then
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acc.next_x = acc.next_x + panel_mods
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else
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local margins = panel_mods.margins
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local margin_x = margins[1]
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local margin_y = margins[2]
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local mpoint = geom.make_point(acc.next_x + margin_x, y + margin_y)
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local r = arrange_panel_modules(common, mods, mpoint, panel_mods.columns)
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local w = r.width + margin_x * 2
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local h = r.height + margin_y * 2
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local pbox = geom.make_box(acc.next_x, y, w, h)
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acc.next_x = acc.next_x + w
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acc.static = pure.flatten({acc.static, {build_surface(common, pbox, r.static)}})
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acc.update = pure.flatten({acc.update, r.update})
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acc.dynamic = pure.flatten({acc.dynamic, r.dynamic})
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end
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return acc
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end
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M.compile_layout = function(common, point, mods, module_sets)
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local __cairo_set_source_surface = cairo_set_source_surface
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local __cairo_paint = cairo_paint
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local r = pure.reduce(
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pure.partial(
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reduce_static,
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common,
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mods,
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point.y
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),
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{next_x = point.x, static = {}, update = {}, dynamic = {}},
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module_sets
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)
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local cs = r.static
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return {
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static = function(cr)
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for i = 1, #cs do
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local c = cs[i]
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__cairo_set_source_surface(cr, c.s, c.x, c.y)
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__cairo_paint(cr)
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end
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end,
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update = pure.sequence(table.unpack(r.update)),
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dynamic = pure.sequence(table.unpack(r.dynamic)),
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}
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end
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return M
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