stand/lua/drawer.lua

   1 --
   2 -- SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3 --
   4 -- Copyright (c) 2015 Pedro Souza <pedrosouza@freebsd.org>
   5 -- Copyright (c) 2018 Kyle Evans <kevans@FreeBSD.org>
   6 -- All rights reserved.
   7 --
   8 -- Redistribution and use in source and binary forms, with or without
   9 -- modification, are permitted provided that the following conditions
  10 -- are met:
  11 -- 1. Redistributions of source code must retain the above copyright
  12 --    notice, this list of conditions and the following disclaimer.
  13 -- 2. Redistributions in binary form must reproduce the above copyright
  14 --    notice, this list of conditions and the following disclaimer in the
  15 --    documentation and/or other materials provided with the distribution.
  16 --
  17 -- THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18 -- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19 -- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20 -- ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21 -- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 -- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23 -- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24 -- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25 -- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26 -- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27 -- SUCH DAMAGE.
  28 --
  29 -- $FreeBSD$
  30 --
  31
  32 local color = require("color")
  33 local config = require("config")
  34 local core = require("core")
  35 local screen = require("screen")
  36
  37 local drawer = {}
  38
  39 local fbsd_brand
  40 local none
  41
  42 local function menuEntryName(drawing_menu, entry)
  43         local name_handler = drawer.menu_name_handlers[entry.entry_type]
  44
  45         if name_handler ~= nil then
  46                 return name_handler(drawing_menu, entry)
  47         end
  48         if type(entry.name) == "function" then
  49                 return entry.name()
  50         end
  51         return entry.name
  52 end
  53
  54 local function getBranddef(brand)
  55         if brand == nil then
  56                 return nil
  57         end
  58         -- Look it up
  59         local branddef = drawer.branddefs[brand]
  60
  61         -- Try to pull it in
  62         if branddef == nil then
  63                 try_include('brand-' .. brand)
  64                 branddef = drawer.branddefs[brand]
  65         end
  66
  67         return branddef
  68 end
  69
  70 local function getLogodef(logo)
  71         if logo == nil then
  72                 return nil
  73         end
  74         -- Look it up
  75         local logodef = drawer.logodefs[logo]
  76
  77         -- Try to pull it in
  78         if logodef == nil then
  79                 try_include('logo-' .. logo)
  80                 logodef = drawer.logodefs[logo]
  81         end
  82
  83         return logodef
  84 end
  85
  86 local function draw(x, y, logo)
  87         for i = 1, #logo do
  88                 screen.setcursor(x, y + i - 1)
  89                 printc(logo[i])
  90         end
  91 end
  92
  93 fbsd_brand = {
  94 "  ______               ____   _____ _____  ",
  95 " |  ____|             |  _ \\ / ____|  __ \\ ",
  96 " | |___ _ __ ___  ___ | |_) | (___ | |  | |",
  97 " |  ___| '__/ _ \\/ _ \\|  _ < \\___ \\| |  | |",
  98 " | |   | | |  __/  __/| |_) |____) | |__| |",
  99 " | |   | | |    |    ||     |      |      |",
 100 " |_|   |_|  \\___|\\___||____/|_____/|_____/ "
 101 }
 102 none = {""}
 103
 104 -- Module exports
 105 drawer.default_brand = 'fbsd'
 106
 107 drawer.menu_name_handlers = {
 108         -- Menu name handlers should take the menu being drawn and entry being
 109         -- drawn as parameters, and return the name of the item.
 110         -- This is designed so that everything, including menu separators, may
 111         -- have their names derived differently. The default action for entry
 112         -- types not specified here is to use entry.name directly.
 113         [core.MENU_SEPARATOR] = function(_, entry)
 114                 if entry.name ~= nil then
 115                         if type(entry.name) == "function" then
 116                                 return entry.name()
 117                         end
 118                         return entry.name
 119                 end
 120                 return ""
 121         end,
 122         [core.MENU_CAROUSEL_ENTRY] = function(_, entry)
 123                 local carid = entry.carousel_id
 124                 local caridx = config.getCarouselIndex(carid)
 125                 local choices = entry.items
 126                 if type(choices) == "function" then
 127                         choices = choices()
 128                 end
 129                 if #choices < caridx then
 130                         caridx = 1
 131                 end
 132                 return entry.name(caridx, choices[caridx], choices)
 133         end,
 134 }
 135
 136 drawer.brand_position = {x = 2, y = 1}
 137 drawer.logo_position = {x = 46, y = 4}
 138 drawer.menu_position = {x = 5, y = 10}
 139 drawer.frame_size = {w = 42, h = 13}
 140 drawer.default_shift = {x = 0, y = 0}
 141 drawer.shift = drawer.default_shift
 142
 143 drawer.branddefs = {
 144         -- Indexed by valid values for loader_brand in loader.conf(5). Valid
 145         -- keys are: graphic (table depicting graphic)
 146         ["fbsd"] = {
 147                 graphic = fbsd_brand,
 148         },
 149         ["none"] = {
 150                 graphic = none,
 151         },
 152 }
 153
 154 function drawer.addBrand(name, def)
 155         drawer.branddefs[name] = def
 156 end
 157
 158 function drawer.addLogo(name, def)
 159         drawer.logodefs[name] = def
 160 end
 161
 162 drawer.logodefs = {
 163         -- Indexed by valid values for loader_logo in loader.conf(5). Valid keys
 164         -- are: requires_color (boolean), graphic (table depicting graphic), and
 165         -- shift (table containing x and y).
 166         ["tribute"] = {
 167                 graphic = fbsd_brand,
 168         },
 169         ["tributebw"] = {
 170                 graphic = fbsd_brand,
 171         },
 172         ["none"] = {
 173                 graphic = none,
 174                 shift = {x = 17, y = 0},
 175         },
 176 }
 177
 178 drawer.frame_styles = {
 179         -- Indexed by valid values for loader_menu_frame in loader.conf(5).
 180         -- All of the keys appearing below must be set for any menu frame style
 181         -- added to drawer.frame_styles.
 182         ["ascii"] = {
 183                 horizontal      = "-",
 184                 vertical        = "|",
 185                 top_left        = "+",
 186                 bottom_left     = "+",
 187                 top_right       = "+",
 188                 bottom_right    = "+",
 189         },
 190         ["single"] = {
 191                 horizontal      = "\xC4",
 192                 vertical        = "\xB3",
 193                 top_left        = "\xDA",
 194                 bottom_left     = "\xC0",
 195                 top_right       = "\xBF",
 196                 bottom_right    = "\xD9",
 197         },
 198         ["double"] = {
 199                 horizontal      = "\xCD",
 200                 vertical        = "\xBA",
 201                 top_left        = "\xC9",
 202                 bottom_left     = "\xC8",
 203                 top_right       = "\xBB",
 204                 bottom_right    = "\xBC",
 205         },
 206 }
 207
 208 function drawer.drawscreen(menu_opts)
 209         -- drawlogo() must go first.
 210         -- it determines the positions of other elements
 211         drawer.drawlogo()
 212         drawer.drawbrand()
 213         drawer.drawbox()
 214         return drawer.drawmenu(menu_opts)
 215 end
 216
 217 function drawer.drawmenu(menudef)
 218         local x = drawer.menu_position.x
 219         local y = drawer.menu_position.y
 220
 221         x = x + drawer.shift.x
 222         y = y + drawer.shift.y
 223
 224         -- print the menu and build the alias table
 225         local alias_table = {}
 226         local entry_num = 0
 227         local menu_entries = menudef.entries
 228         local effective_line_num = 0
 229         if type(menu_entries) == "function" then
 230                 menu_entries = menu_entries()
 231         end
 232         for _, e in ipairs(menu_entries) do
 233                 -- Allow menu items to be conditionally visible by specifying
 234                 -- a visible function.
 235                 if e.visible ~= nil and not e.visible() then
 236                         goto continue
 237                 end
 238                 effective_line_num = effective_line_num + 1
 239                 if e.entry_type ~= core.MENU_SEPARATOR then
 240                         entry_num = entry_num + 1
 241                         screen.setcursor(x, y + effective_line_num)
 242
 243                         printc(entry_num .. ". " .. menuEntryName(menudef, e))
 244
 245                         -- fill the alias table
 246                         alias_table[tostring(entry_num)] = e
 247                         if e.alias ~= nil then
 248                                 for _, a in ipairs(e.alias) do
 249                                         alias_table[a] = e
 250                                 end
 251                         end
 252                 else
 253                         screen.setcursor(x, y + effective_line_num)
 254                         printc(menuEntryName(menudef, e))
 255                 end
 256                 ::continue::
 257         end
 258         return alias_table
 259 end
 260
 261 function drawer.drawbox()
 262         local x = drawer.menu_position.x - 3
 263         local y = drawer.menu_position.y - 1
 264         local w = drawer.frame_size.w
 265         local h = drawer.frame_size.h
 266
 267         local framestyle = loader.getenv("loader_menu_frame") or "double"
 268         local framespec = drawer.frame_styles[framestyle]
 269         -- If we don't have a framespec for the current frame style, just don't
 270         -- draw a box.
 271         if framespec == nil then
 272                 return
 273         end
 274
 275         local hl = framespec.horizontal
 276         local vl = framespec.vertical
 277
 278         local tl = framespec.top_left
 279         local bl = framespec.bottom_left
 280         local tr = framespec.top_right
 281         local br = framespec.bottom_right
 282
 283         x = x + drawer.shift.x
 284         y = y + drawer.shift.y
 285
 286         screen.setcursor(x, y); printc(tl)
 287         screen.setcursor(x, y + h); printc(bl)
 288         screen.setcursor(x + w, y); printc(tr)
 289         screen.setcursor(x + w, y + h); printc(br)
 290
 291         screen.setcursor(x + 1, y)
 292         for _ = 1, w - 1 do
 293                 printc(hl)
 294         end
 295
 296         screen.setcursor(x + 1, y + h)
 297         for _ = 1, w - 1 do
 298                 printc(hl)
 299         end
 300
 301         for i = 1, h - 1 do
 302                 screen.setcursor(x, y + i)
 303                 printc(vl)
 304                 screen.setcursor(x + w, y + i)
 305                 printc(vl)
 306         end
 307
 308         local menu_header = loader.getenv("loader_menu_title") or
 309             "Welcome to FreeBSD"
 310         local menu_header_align = loader.getenv("loader_menu_title_align")
 311         local menu_header_x
 312
 313         if menu_header_align ~= nil then
 314                 menu_header_align = menu_header_align:lower()
 315                 if menu_header_align == "left" then
 316                         -- Just inside the left border on top
 317                         menu_header_x = x + 1
 318                 elseif menu_header_align == "right" then
 319                         -- Just inside the right border on top
 320                         menu_header_x = x + w - #menu_header
 321                 end
 322         end
 323         if menu_header_x == nil then
 324                 menu_header_x = x + (w / 2) - (#menu_header / 2)
 325         end
 326         screen.setcursor(menu_header_x, y)
 327         printc(menu_header)
 328 end
 329
 330 function drawer.drawbrand()
 331         local x = tonumber(loader.getenv("loader_brand_x")) or
 332             drawer.brand_position.x
 333         local y = tonumber(loader.getenv("loader_brand_y")) or
 334             drawer.brand_position.y
 335
 336         local branddef = getBranddef(loader.getenv("loader_brand"))
 337
 338         if branddef == nil then
 339                 branddef = getBranddef(drawer.default_brand)
 340         end
 341
 342         local graphic = branddef.graphic
 343
 344         x = x + drawer.shift.x
 345         y = y + drawer.shift.y
 346         draw(x, y, graphic)
 347 end
 348
 349 function drawer.drawlogo()
 350         local x = tonumber(loader.getenv("loader_logo_x")) or
 351             drawer.logo_position.x
 352         local y = tonumber(loader.getenv("loader_logo_y")) or
 353             drawer.logo_position.y
 354
 355         local logo = loader.getenv("loader_logo")
 356         local colored = color.isEnabled()
 357
 358         local logodef = getLogodef(logo)
 359
 360         if logodef == nil or logodef.graphic == nil or
 361             (not colored and logodef.requires_color) then
 362                 -- Choose a sensible default
 363                 if colored then
 364                         logodef = getLogodef("orb")
 365                 else
 366                         logodef = getLogodef("orbbw")
 367                 end
 368         end
 369
 370         if logodef ~= nil and logodef.graphic == none then
 371                 drawer.shift = logodef.shift
 372         else
 373                 drawer.shift = drawer.default_shift
 374         end
 375
 376         x = x + drawer.shift.x
 377         y = y + drawer.shift.y
 378
 379         if logodef ~= nil and logodef.shift ~= nil then
 380                 x = x + logodef.shift.x
 381                 y = y + logodef.shift.y
 382         end
 383
 384         draw(x, y, logodef.graphic)
 385 end
 386
 387 return drawer