elwix/config/boot/menu.4th - view

File: [ELWIX - Embedded LightWeight unIX -] / elwix / config / boot / menu.4th
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Thu Mar 11 13:59:50 2021 UTC (3 years, 9 months ago) by misho
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CVS tags: elwix2_8, elwix2_7, HEAD, ELWIX2_7, ELWIX2_6

ver 2.6

\ Copyright (c) 2003 Scott Long <scottl@FreeBSD.org> \ Copyright (c) 2003 Aleksander Fafula <alex@fafula.com> \ Copyright (c) 2006-2015 Devin Teske <dteske@FreeBSD.org> \ All rights reserved. \ \ Redistribution and use in source and binary forms, with or without \ modification, are permitted provided that the following conditions \ are met: \ 1. Redistributions of source code must retain the above copyright \ notice, this list of conditions and the following disclaimer. \ 2. Redistributions in binary form must reproduce the above copyright \ notice, this list of conditions and the following disclaimer in the \ documentation and/or other materials provided with the distribution. \ \ THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND \ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE \ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE \ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE \ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL \ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS \ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) \ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT \ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY \ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF \ SUCH DAMAGE. \ \ $FreeBSD: stable/12/stand/forth/menu.4th 354010 2019-10-24 04:05:53Z kevans $ \ \ $Id: menu.4th,v 1.6 2021/03/11 13:59:50 misho Exp $ marker task-menu.4th \ Frame drawing include /boot/frames.4th vocabulary menu-infrastructure vocabulary menu-namespace vocabulary menu-command-helpers only forth also menu-infrastructure definitions f_double \ Set frames to double (see frames.4th). Replace with \ f_single if you want single frames. 46 constant dot \ ASCII definition of a period (in decimal) 5 constant menu_default_x \ default column position of timeout 10 constant menu_default_y \ default row position of timeout msg 4 constant menu_timeout_default_x \ default column position of timeout 23 constant menu_timeout_default_y \ default row position of timeout msg 10 constant menu_timeout_default \ default timeout (in seconds) \ Customize the following values with care 1 constant menu_start \ Numerical prefix of first menu item dot constant bullet \ Menu bullet (appears after numerical prefix) 5 constant menu_x \ Row position of the menu (from the top) 10 constant menu_y \ Column position of the menu (from left side) \ Menu Appearance variable menuidx \ Menu item stack for number prefixes variable menurow \ Menu item stack for positioning variable menubllt \ Menu item bullet \ Menu Positioning variable menuX \ Menu X offset (columns) variable menuY \ Menu Y offset (rows) \ Menu-item elements variable menurebootadded \ Parsing of kernels into menu-items variable kernidx variable kernlen variable kernmenuidx \ Menu timer [count-down] variables variable menu_timeout_enabled \ timeout state (internal use only) variable menu_time \ variable for tracking the passage of time variable menu_timeout \ determined configurable delay duration variable menu_timeout_x \ column position of timeout message variable menu_timeout_y \ row position of timeout message \ Containers for parsing kernels into menu-items create kerncapbuf 64 allot create kerndefault 64 allot create kernelsbuf 256 allot only forth also menu-namespace definitions \ Menu-item key association/detection variable menukey1 variable menukey2 variable menukey3 variable menukey4 variable menukey5 variable menukey6 variable menukey7 variable menukey8 variable menureboot variable menuacpi variable menuoptions variable menukernel \ Menu initialization status variables variable init_state1 variable init_state2 variable init_state3 variable init_state4 variable init_state5 variable init_state6 variable init_state7 variable init_state8 \ Boolean option status variables variable toggle_state1 variable toggle_state2 variable toggle_state3 variable toggle_state4 variable toggle_state5 variable toggle_state6 variable toggle_state7 variable toggle_state8 \ Array option status variables variable cycle_state1 variable cycle_state2 variable cycle_state3 variable cycle_state4 variable cycle_state5 variable cycle_state6 variable cycle_state7 variable cycle_state8 \ Containers for storing the initial caption text create init_text1 64 allot create init_text2 64 allot create init_text3 64 allot create init_text4 64 allot create init_text5 64 allot create init_text6 64 allot create init_text7 64 allot create init_text8 64 allot only forth definitions : arch-i386? ( -- BOOL ) \ Returns TRUE (-1) on i386, FALSE (0) otherwise. s" arch-i386" environment? dup if drop then ; : acpipresent? ( -- flag ) \ Returns TRUE if ACPI is present, FALSE otherwise s" hint.acpi.0.rsdp" getenv dup -1 = if drop false exit then 2drop true ; : acpienabled? ( -- flag ) \ Returns TRUE if ACPI is enabled, FALSE otherwise s" hint.acpi.0.disabled" getenv dup -1 <> if s" 0" compare 0<> if false exit then else drop then true ; : +c! ( N C-ADDR/U K -- C-ADDR/U ) 3 pick 3 pick ( n c-addr/u k -- n c-addr/u k n c-addr ) rot + c! ( n c-addr/u k n c-addr -- n c-addr/u ) rot drop ( n c-addr/u -- c-addr/u ) ; only forth also menu-namespace definitions \ Forth variables : namespace ( C-ADDR/U N -- ) also menu-namespace +c! evaluate previous ; : menukeyN ( N -- ADDR ) s" menukeyN" 7 namespace ; : init_stateN ( N -- ADDR ) s" init_stateN" 10 namespace ; : toggle_stateN ( N -- ADDR ) s" toggle_stateN" 12 namespace ; : cycle_stateN ( N -- ADDR ) s" cycle_stateN" 11 namespace ; : init_textN ( N -- C-ADDR ) s" init_textN" 9 namespace ; \ Environment variables : kernel[x] ( N -- C-ADDR/U ) s" kernel[x]" 7 +c! ; : menu_init[x] ( N -- C-ADDR/U ) s" menu_init[x]" 10 +c! ; : menu_command[x] ( N -- C-ADDR/U ) s" menu_command[x]" 13 +c! ; : menu_caption[x] ( N -- C-ADDR/U ) s" menu_caption[x]" 13 +c! ; : ansi_caption[x] ( N -- C-ADDR/U ) s" ansi_caption[x]" 13 +c! ; : menu_keycode[x] ( N -- C-ADDR/U ) s" menu_keycode[x]" 13 +c! ; : toggled_text[x] ( N -- C-ADDR/U ) s" toggled_text[x]" 13 +c! ; : toggled_ansi[x] ( N -- C-ADDR/U ) s" toggled_ansi[x]" 13 +c! ; : menu_caption[x][y] ( N M -- C-ADDR/U ) s" menu_caption[x][y]" 16 +c! 13 +c! ; : ansi_caption[x][y] ( N M -- C-ADDR/U ) s" ansi_caption[x][y]" 16 +c! 13 +c! ; also menu-infrastructure definitions \ This function prints a menu item at menuX (row) and menuY (column), returns \ the incremental decimal ASCII value associated with the menu item, and \ increments the cursor position to the next row for the creation of the next \ menu item. This function is called by the menu-create function. You need not \ call it directly. \ : printmenuitem ( menu_item_str -- ascii_keycode ) loader_color? if [char] ^ escc! then menurow dup @ 1+ swap ! ( increment menurow ) menuidx dup @ 1+ swap ! ( increment menuidx ) \ Calculate the menuitem row position menurow @ menuY @ + \ Position the cursor at the menuitem position dup menuX @ swap at-xy \ Print the value of menuidx loader_color? dup ( -- bool bool ) if b then menuidx @ . if me then \ Move the cursor forward 1 column dup menuX @ 1+ swap at-xy menubllt @ emit \ Print the menu bullet using the emit function \ Move the cursor to the 3rd column from the current position \ to allow for a space between the numerical prefix and the \ text caption menuX @ 3 + swap at-xy \ Print the menu caption (we expect a string to be on the stack \ prior to invoking this function) type \ Here we will add the ASCII decimal of the numerical prefix \ to the stack (decimal ASCII for `1' is 49) as a "return value" menuidx @ 48 + ; \ This function prints the appropriate menuitem basename to the stack if an \ ACPI option is to be presented to the user, otherwise returns -1. Used \ internally by menu-create, you need not (nor should you) call this directly. \ : acpimenuitem ( -- C-Addr/U | -1 ) arch-i386? if acpipresent? if acpienabled? if loader_color? if s" toggled_ansi[x]" else s" toggled_text[x]" then else loader_color? if s" ansi_caption[x]" else s" menu_caption[x]" then then else menuidx dup @ 1+ swap ! ( increment menuidx ) -1 then else -1 then ; : delim? ( C -- BOOL ) dup 32 = ( c -- c bool ) \ [sp] space over 9 = or ( c bool -- c bool ) \ [ht] horizontal tab over 10 = or ( c bool -- c bool ) \ [nl] newline over 13 = or ( c bool -- c bool ) \ [cr] carriage return over [char] , = or ( c bool -- c bool ) \ comma swap drop ( c bool -- bool ) \ return boolean ; \ This function parses $kernels into variables that are used by the menu to \ display which kernel to boot when the [overloaded] `boot' word is interpreted. \ Used internally by menu-create, you need not (nor should you) call this \ directly. \ : parse-kernels ( N -- ) \ kernidx kernidx ! ( n -- ) \ store provided `x' value [char] 0 kernmenuidx ! \ initialize `y' value for menu_caption[x][y] \ Attempt to get a list of kernels, fall back to sensible default s" kernels" getenv dup -1 = if drop ( cruft ) s" kernel kernel.old" then ( -- c-addr/u ) \ Check to see if the user has altered $kernel by comparing it against \ $kernel[N] where N is kernel_state (the actively displayed kernel). s" kernel_state" evaluate @ 48 + s" kernel[N]" 7 +c! getenv dup -1 <> if s" kernel" getenv dup -1 = if drop ( cruft ) s" " then 2swap 2over compare 0= if 2drop FALSE ( skip below conditional ) else \ User has changed $kernel TRUE ( slurp in new value ) then else \ We haven't yet parsed $kernels into $kernel[N] drop ( getenv cruft ) s" kernel" getenv dup -1 = if drop ( cruft ) s" " then TRUE ( slurp in initial value ) then ( c-addr/u -- c-addr/u c-addr/u,-1 | 0 ) if \ slurp new value into kerndefault kerndefault 1+ 0 2swap strcat swap 1- c! then \ Clear out existing parsed-kernels kernidx @ [char] 0 begin dup kernel[x] unsetenv 2dup menu_caption[x][y] unsetenv 2dup ansi_caption[x][y] unsetenv 1+ dup [char] 8 > until 2drop \ Step through the string until we find the end begin 0 kernlen ! \ initialize length of value \ Skip leading whitespace and/or comma delimiters begin dup 0<> if over c@ delim? ( c-addr/u -- c-addr/u bool ) else false ( c-addr/u -- c-addr/u bool ) then while 1- swap 1+ swap ( c-addr/u -- c-addr'/u' ) repeat ( c-addr/u -- c-addr'/u' ) dup 0= if \ end of string while eating whitespace 2drop ( c-addr/u -- ) kernmenuidx @ [char] 0 <> if \ found at least one exit \ all done then \ No entries in $kernels; use $kernel instead s" kernel" getenv dup -1 = if drop ( cruft ) s" " then ( -- c-addr/u ) dup kernlen ! \ store entire value length as kernlen else \ We're still within $kernels parsing toward the end; \ find delimiter/end to determine kernlen 2dup ( c-addr/u -- c-addr/u c-addr/u ) begin dup 0<> while over c@ delim? if drop 0 ( break ) \ found delimiter else kernlen @ 1+ kernlen ! \ incrememnt 1- swap 1+ swap \ c-addr++ u-- then repeat 2drop ( c-addr/u c-addr'/u' -- c-addr/u ) \ If this is the first entry, compare it to $kernel \ If different, then insert $kernel beforehand kernmenuidx @ [char] 0 = if over kernlen @ kerndefault count compare if kernelsbuf 0 kerndefault count strcat s" ," strcat 2swap strcat kerndefault count swap drop kernlen ! then then then ( c-addr/u -- c-addr'/u' ) \ At this point, we should have something on the stack to store \ as the next kernel menu option; start assembling variables over kernlen @ ( c-addr/u -- c-addr/u c-addr/u2 ) \ Assign first to kernel[x] 2dup kernmenuidx @ kernel[x] setenv \ Assign second to menu_caption[x][y] kerncapbuf 0 s" [K]ernel: " strcat 2over strcat kernidx @ kernmenuidx @ menu_caption[x][y] setenv \ Assign third to ansi_caption[x][y] kerncapbuf 0 s" @[1mK@[mernel: " [char] @ escc! strcat kernmenuidx @ [char] 0 = if s" default/@[32m" else s" @[34;1m" then [char] @ escc! strcat 2over strcat s" @[m" [char] @ escc! strcat kernidx @ kernmenuidx @ ansi_caption[x][y] setenv 2drop ( c-addr/u c-addr/u2 -- c-addr/u ) kernmenuidx @ 1+ dup kernmenuidx ! [char] 8 > if 2drop ( c-addr/u -- ) exit then kernlen @ - swap kernlen @ + swap ( c-addr/u -- c-addr'/u' ) again ; \ This function goes through the kernels that were discovered by the \ parse-kernels function [above], adding " (# of #)" text to the end of each \ caption. \ : tag-kernels ( -- ) kernidx @ ( -- x ) dup 0= if exit then [char] 0 s" (Y of Z)" ( x -- x y c-addr/u ) kernmenuidx @ -rot 7 +c! \ Replace 'Z' with number of kernels parsed begin 2 pick 1+ -rot 2 +c! \ Replace 'Y' with current ASCII num 2over menu_caption[x][y] getenv dup -1 <> if 2dup + 1- c@ [char] ) = if 2drop \ Already tagged else kerncapbuf 0 2swap strcat 2over strcat 5 pick 5 pick menu_caption[x][y] setenv then else drop ( getenv cruft ) then 2over ansi_caption[x][y] getenv dup -1 <> if 2dup + 1- c@ [char] ) = if 2drop \ Already tagged else kerncapbuf 0 2swap strcat 2over strcat 5 pick 5 pick ansi_caption[x][y] setenv then else drop ( getenv cruft ) then rot 1+ dup [char] 8 > if -rot 2drop TRUE ( break ) else -rot FALSE then until 2drop ( x y -- ) ; \ This function creates the list of menu items. This function is called by the \ menu-display function. You need not call it directly. \ : menu-create ( -- ) \ Print the frame caption at (x,y) s" loader_menu_title" getenv dup -1 = if drop s" Welcome to -ELWIX-" then TRUE ( use default alignment ) s" loader_menu_title_align" getenv dup -1 <> if 2dup s" left" compare-insensitive 0= if ( 1 ) 2drop ( c-addr/u ) drop ( bool ) menuX @ menuY @ 1- FALSE ( don't use default alignment ) else ( 1 ) 2dup s" right" compare-insensitive 0= if ( 2 ) 2drop ( c-addr/u ) drop ( bool ) menuX @ 42 + 4 - over - menuY @ 1- FALSE ( don't use default alignment ) else ( 2 ) 2drop ( c-addr/u ) then ( 1 ) then else drop ( getenv cruft ) then if ( use default center alignement? ) menuX @ 19 + over 2 / - menuY @ 1- then at-xy type \ If $menu_init is set, evaluate it (allowing for whole menus to be \ constructed dynamically -- as this function could conceivably set \ the remaining environment variables to construct the menu entirely). \ s" menu_init" getenv dup -1 <> if evaluate else drop then \ Print our menu options with respective key/variable associations. \ `printmenuitem' ends by adding the decimal ASCII value for the \ numerical prefix to the stack. We store the value left on the stack \ to the key binding variable for later testing against a character \ captured by the `getkey' function. \ Note that any menu item beyond 9 will have a numerical prefix on the \ screen consisting of the first digit (ie. 1 for the tenth menu item) \ and the key required to activate that menu item will be the decimal \ ASCII of 48 plus the menu item (ie. 58 for the tenth item, aka. `:') \ which is misleading and not desirable. \ \ Thus, we do not allow more than 8 configurable items on the menu \ (with "Reboot" as the optional ninth and highest numbered item). \ \ Initialize the ACPI option status. \ 0 menuacpi ! s" menu_acpi" getenv -1 <> if c@ dup 48 > over 57 < and if ( '1' <= c1 <= '8' ) menuacpi ! arch-i386? if acpipresent? if \ \ Set menu toggle state to active state \ (required by generic toggle_menuitem) \ acpienabled? menuacpi @ toggle_stateN ! then then else drop then then \ \ Initialize kernel captions after parsing $kernels \ 0 menukernel ! s" menu_kernel" getenv -1 <> if c@ dup 48 > over 57 < and if ( '1' <= c1 <= '8' ) dup menukernel ! dup parse-kernels tag-kernels \ Get the current cycle state (entry to use) s" kernel_state" evaluate @ 48 + ( n -- n y ) \ If state is invalid, reset dup kernmenuidx @ 1- > if drop [char] 0 ( n y -- n 48 ) 0 s" kernel_state" evaluate ! over s" init_kernel" evaluate drop then \ Set the current non-ANSI caption 2dup swap dup ( n y -- n y y n n ) s" set menu_caption[x]=$menu_caption[x][y]" 17 +c! 34 +c! 37 +c! evaluate ( n y y n n c-addr/u -- n y ) \ Set the current ANSI caption 2dup swap dup ( n y -- n y y n n ) s" set ansi_caption[x]=$ansi_caption[x][y]" 17 +c! 34 +c! 37 +c! evaluate ( n y y n n c-addr/u -- n y ) \ Initialize cycle state from stored value 48 - ( n y -- n k ) s" init_cyclestate" evaluate ( n k -- n ) \ Set $kernel to $kernel[y] s" activate_kernel" evaluate ( n -- n ) then drop then \ \ Initialize the menu_options visual separator. \ 0 menuoptions ! s" menu_options" getenv -1 <> if c@ dup 48 > over 57 < and if ( '1' <= c1 <= '8' ) menuoptions ! else drop then then \ Initialize "Reboot" menu state variable (prevents double-entry) false menurebootadded ! menu_start 1- menuidx ! \ Initialize the starting index for the menu 0 menurow ! \ Initialize the starting position for the menu 49 \ Iterator start (loop range 49 to 56; ASCII '1' to '8') begin \ If the "Options:" separator, print it. dup menuoptions @ = if \ Optionally add a reboot option to the menu s" menu_reboot" getenv -1 <> if drop s" Reboot" printmenuitem menureboot ! true menurebootadded ! then menuX @ menurow @ 2 + menurow ! menurow @ menuY @ + at-xy s" menu_optionstext" getenv dup -1 <> if type else drop ." Options:" then then \ If this is the ACPI menu option, act accordingly. dup menuacpi @ = if dup acpimenuitem ( n -- n n c-addr/u | n n -1 ) dup -1 <> if 13 +c! ( n n c-addr/u -- n c-addr/u ) \ replace 'x' with n else swap drop ( n n -1 -- n -1 ) over menu_command[x] unsetenv then else \ make sure we have not already initialized this item dup init_stateN dup @ 0= if 1 swap ! \ If this menuitem has an initializer, run it dup menu_init[x] getenv dup -1 <> if evaluate else drop then else drop then dup loader_color? if ansi_caption[x] else menu_caption[x] then then dup -1 <> if \ test for environment variable getenv dup -1 <> if printmenuitem ( c-addr/u -- n ) dup menukeyN ! else drop then else drop then 1+ dup 56 > \ add 1 to iterator, continue if less than 57 until drop \ iterator \ Optionally add a reboot option to the menu menurebootadded @ true <> if s" menu_reboot" getenv -1 <> if drop \ no need for the value s" Reboot" \ menu caption (required by printmenuitem) printmenuitem menureboot ! else 0 menureboot ! then then ; \ Takes a single integer on the stack and updates the timeout display. The \ integer must be between 0 and 9 (we will only update a single digit in the \ source message). \ : menu-timeout-update ( N -- ) \ Enforce minimum/maximum dup 9 > if drop 9 then dup 0 < if drop 0 then s" Autoboot in N seconds. [Space] to pause" ( n -- n c-addr/u ) 2 pick 0> if rot 48 + -rot ( n c-addr/u -- n' c-addr/u ) \ convert to ASCII 12 +c! ( n' c-addr/u -- c-addr/u ) \ replace 'N' above menu_timeout_x @ menu_timeout_y @ at-xy \ position cursor type ( c-addr/u -- ) \ print message else menu_timeout_x @ menu_timeout_y @ at-xy \ position cursor spaces ( n c-addr/u -- n c-addr ) \ erase message 2drop ( n c-addr -- ) then 0 25 at-xy ( position cursor back at bottom-left ) ; \ This function blocks program flow (loops forever) until a key is pressed. \ The key that was pressed is added to the top of the stack in the form of its \ decimal ASCII representation. This function is called by the menu-display \ function. You need not call it directly. \ : getkey ( -- ascii_keycode ) begin \ loop forever menu_timeout_enabled @ 1 = if ( -- ) seconds ( get current time: -- N ) dup menu_time @ <> if ( has time elapsed?: N N N -- N ) \ At least 1 second has elapsed since last loop \ so we will decrement our "timeout" (really a \ counter, insuring that we do not proceed too \ fast) and update our timeout display. menu_time ! ( update time record: N -- ) menu_timeout @ ( "time" remaining: -- N ) dup 0> if ( greater than 0?: N N 0 -- N ) 1- ( decrement counter: N -- N ) dup menu_timeout ! ( re-assign: N N Addr -- N ) then ( -- N ) dup 0= swap 0< or if ( N <= 0?: N N -- ) \ halt the timer 0 menu_timeout ! ( 0 Addr -- ) 0 menu_timeout_enabled ! ( 0 Addr -- ) then \ update the timer display ( N -- ) menu_timeout @ menu-timeout-update menu_timeout @ 0= if \ We've reached the end of the timeout \ (user did not cancel by pressing ANY \ key) s" menu_timeout_command" getenv dup -1 = if drop \ clean-up else evaluate then then else ( -- N ) \ No [detectable] time has elapsed (in seconds) drop ( N -- ) then ( -- ) then key? if \ Was a key pressed? (see loader(8)) \ An actual key was pressed (if the timeout is running, \ kill it regardless of which key was pressed) menu_timeout @ 0<> if 0 menu_timeout ! 0 menu_timeout_enabled ! \ clear screen of timeout message 0 menu-timeout-update then \ get the key that was pressed and exit (if we \ get a non-zero ASCII code) key dup 0<> if exit else drop then then 50 ms \ sleep for 50 milliseconds (see loader(8)) again ; : menu-erase ( -- ) \ Erases menu and resets positioning variable to position 1. \ Clear the screen area associated with the interactive menu menuX @ menuY @ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 1+ 2dup at-xy 38 spaces 2drop \ Reset the starting index and position for the menu menu_start 1- menuidx ! 0 menurow ! ; only forth also menu-infrastructure also menu-namespace also menu-command-helpers definitions : toggle_menuitem ( N -- N ) \ toggles caption text and internal menuitem state \ ASCII numeral equal to user-selected menu item must be on the stack. \ We do not modify the stack, so the ASCII numeral is left on top. dup init_textN c@ 0= if \ NOTE: no need to check toggle_stateN since the first time we \ are called, we will populate init_textN. Further, we don't \ need to test whether menu_caption[x] (ansi_caption[x] when \ loader_color?=1) is available since we would not have been \ called if the caption was NULL. \ base name of environment variable dup ( n -- n n ) \ key pressed loader_color? if ansi_caption[x] else menu_caption[x] then getenv dup -1 <> if 2 pick ( n c-addr/u -- n c-addr/u n ) init_textN ( n c-addr/u n -- n c-addr/u c-addr ) \ now we have the buffer c-addr on top \ ( followed by c-addr/u of current caption ) \ Copy the current caption into our buffer 2dup c! -rot \ store strlen at first byte begin rot 1+ \ bring alt addr to top and increment -rot -rot \ bring buffer addr to top 2dup c@ swap c! \ copy current character 1+ \ increment buffer addr rot 1- \ bring buffer len to top and decrement dup 0= \ exit loop if buffer len is zero until 2drop \ buffer len/addr drop \ alt addr else drop then then \ Now we are certain to have init_textN populated with the initial \ value of menu_caption[x] (ansi_caption[x] with loader_color enabled). \ We can now use init_textN as the untoggled caption and \ toggled_text[x] (toggled_ansi[x] with loader_color enabled) as the \ toggled caption and store the appropriate value into menu_caption[x] \ (again, ansi_caption[x] with loader_color enabled). Last, we'll \ negate the toggled state so that we reverse the flow on subsequent \ calls. dup toggle_stateN @ 0= if \ state is OFF, toggle to ON dup ( n -- n n ) \ key pressed loader_color? if toggled_ansi[x] else toggled_text[x] then getenv dup -1 <> if \ Assign toggled text to menu caption 2 pick ( n c-addr/u -- n c-addr/u n ) \ key pressed loader_color? if ansi_caption[x] else menu_caption[x] then setenv else \ No toggled text, keep the same caption drop ( n -1 -- n ) \ getenv cruft then true \ new value of toggle state var (to be stored later) else \ state is ON, toggle to OFF dup init_textN count ( n -- n c-addr/u ) \ Assign init_textN text to menu caption 2 pick ( n c-addr/u -- n c-addr/u n ) \ key pressed loader_color? if ansi_caption[x] else menu_caption[x] then setenv false \ new value of toggle state var (to be stored below) then \ now we'll store the new toggle state (on top of stack) over toggle_stateN ! ; : cycle_menuitem ( N -- N ) \ cycles through array of choices for a menuitem \ ASCII numeral equal to user-selected menu item must be on the stack. \ We do not modify the stack, so the ASCII numeral is left on top. dup cycle_stateN dup @ 1+ \ get value and increment \ Before assigning the (incremented) value back to the pointer, \ let's test for the existence of this particular array element. \ If the element exists, we'll store index value and move on. \ Otherwise, we'll loop around to zero and store that. dup 48 + ( n addr k -- n addr k k' ) \ duplicate array index and convert to ASCII numeral 3 pick swap ( n addr k k' -- n addr k n k' ) \ (n,k') as (x,y) loader_color? if ansi_caption[x][y] else menu_caption[x][y] then ( n addr k n k' -- n addr k c-addr/u ) \ Now test for the existence of our incremented array index in the \ form of $menu_caption[x][y] ($ansi_caption[x][y] with loader_color \ enabled) as set in loader.rc(5), et. al. getenv dup -1 = if \ No caption set for this array index. Loop back to zero. drop ( n addr k -1 -- n addr k ) \ getenv cruft drop 0 ( n addr k -- n addr 0 ) \ new value to store later 2 pick [char] 0 ( n addr 0 -- n addr 0 n 48 ) \ (n,48) as (x,y) loader_color? if ansi_caption[x][y] else menu_caption[x][y] then ( n addr 0 n 48 -- n addr 0 c-addr/u ) getenv dup -1 = if \ Highly unlikely to occur, but to ensure things move \ along smoothly, allocate a temporary NULL string drop ( cruft ) s" " then then \ At this point, we should have the following on the stack (in order, \ from bottom to top): \ \ n - Ascii numeral representing the menu choice (inherited) \ addr - address of our internal cycle_stateN variable \ k - zero-based number we intend to store to the above \ c-addr/u - string value we intend to store to menu_caption[x] \ (or ansi_caption[x] with loader_color enabled) \ \ Let's perform what we need to with the above. \ Assign array value text to menu caption 4 pick ( n addr k c-addr/u -- n addr k c-addr/u n ) loader_color? if ansi_caption[x] else menu_caption[x] then setenv swap ! ( n addr k -- n ) \ update array state variable ; only forth definitions also menu-infrastructure \ Erase and redraw the menu. Useful if you change a caption and want to \ update the menu to reflect the new value. \ : menu-redraw ( -- ) menu-erase menu-create ; \ This function initializes the menu. Call this from your `loader.rc' file \ before calling any other menu-related functions. \ : menu-init ( -- ) menu_start 1- menuidx ! \ Initialize the starting index for the menu 0 menurow ! \ Initialize the starting position for the menu \ Assign configuration values s" loader_menu_y" getenv dup -1 = if drop \ no custom row position menu_default_y else \ make sure custom position is a number ?number 0= if menu_default_y \ or use default then then menuY ! s" loader_menu_x" getenv dup -1 = if drop \ no custom column position menu_default_x else \ make sure custom position is a number ?number 0= if menu_default_x \ or use default then then menuX ! \ Interpret a custom frame type for the menu TRUE ( draw a box? default yes, but might be altered below ) s" loader_menu_frame" getenv dup -1 = if ( 1 ) drop \ no custom frame type else ( 1 ) 2dup s" single" compare-insensitive 0= if ( 2 ) f_single ( see frames.4th ) else ( 2 ) 2dup s" double" compare-insensitive 0= if ( 3 ) f_double ( see frames.4th ) else ( 3 ) s" none" compare-insensitive 0= if ( 4 ) drop FALSE \ don't draw a box ( 4 ) then ( 3 ) then ( 2 ) then ( 1 ) then if 42 13 menuX @ 3 - menuY @ 1- box \ Draw frame (w,h,x,y) then 0 25 at-xy \ Move cursor to the bottom for output ; also menu-namespace \ Main function. Call this from your `loader.rc' file. \ : menu-display ( -- ) 0 menu_timeout_enabled ! \ start with automatic timeout disabled \ check indication that automatic execution after delay is requested s" menu_timeout_command" getenv -1 <> if ( Addr C -1 -- | Addr ) drop ( just testing existence right now: Addr -- ) \ initialize state variables seconds menu_time ! ( store the time we started ) 1 menu_timeout_enabled ! ( enable automatic timeout ) \ read custom time-duration (if set) s" autoboot_delay" getenv dup -1 = if drop \ no custom duration (remove dup'd bunk -1) menu_timeout_default \ use default setting else 2dup ?number 0= if ( if not a number ) \ disable timeout if "NO", else use default s" NO" compare-insensitive 0= if 0 menu_timeout_enabled ! 0 ( assigned to menu_timeout below ) else menu_timeout_default then else -rot 2drop \ boot immediately if less than zero dup 0< if drop menu-create 0 25 at-xy 0 boot then then then menu_timeout ! ( store value on stack from above ) menu_timeout_enabled @ 1 = if \ read custom column position (if set) s" loader_menu_timeout_x" getenv dup -1 = if drop \ no custom column position menu_timeout_default_x \ use default setting else \ make sure custom position is a number ?number 0= if menu_timeout_default_x \ or use default then then menu_timeout_x ! ( store value on stack from above ) \ read custom row position (if set) s" loader_menu_timeout_y" getenv dup -1 = if drop \ no custom row position menu_timeout_default_y \ use default setting else \ make sure custom position is a number ?number 0= if menu_timeout_default_y \ or use default then then menu_timeout_y ! ( store value on stack from above ) then then menu-create begin \ Loop forever 0 25 at-xy \ Move cursor to the bottom for output getkey \ Block here, waiting for a key to be pressed dup -1 = if drop exit \ Caught abort (abnormal return) then \ Boot if the user pressed Enter/Ctrl-M (13) or \ Ctrl-Enter/Ctrl-J (10) dup over 13 = swap 10 = or if drop ( no longer needed ) s" boot" evaluate exit ( pedantic; never reached ) then dup menureboot @ = if 0 reboot then \ Evaluate the decimal ASCII value against known menu item \ key associations and act accordingly 49 \ Iterator start (loop range 49 to 56; ASCII '1' to '8') begin dup menukeyN @ rot tuck = if \ Adjust for missing ACPI menuitem on non-i386 arch-i386? true <> menuacpi @ 0<> and if menuacpi @ over 2dup < -rot = or over 58 < and if ( key >= menuacpi && key < 58: N -- N ) 1+ then then \ Test for the environment variable dup menu_command[x] getenv dup -1 <> if \ Execute the stored procedure evaluate \ We expect there to be a non-zero \ value left on the stack after \ executing the stored procedure. \ If so, continue to run, else exit. 0= if drop \ key pressed drop \ loop iterator exit else swap \ need iterator on top then then \ Re-adjust for missing ACPI menuitem arch-i386? true <> menuacpi @ 0<> and if swap menuacpi @ 1+ over 2dup < -rot = or over 59 < and if 1- then swap then else swap \ need iterator on top then \ \ Check for menu keycode shortcut(s) \ dup menu_keycode[x] getenv dup -1 = if drop else ?number 0<> if rot tuck = if swap dup menu_command[x] getenv dup -1 <> if evaluate 0= if 2drop exit then else drop then else swap then then then 1+ dup 56 > \ increment iterator \ continue if less than 57 until drop \ loop iterator drop \ key pressed again \ Non-operational key was pressed; repeat ; \ This function unsets all the possible environment variables associated with \ creating the interactive menu. \ : menu-unset ( -- ) 49 \ Iterator start (loop range 49 to 56; ASCII '1' to '8') begin dup menu_init[x] unsetenv \ menu initializer dup menu_command[x] unsetenv \ menu command dup menu_caption[x] unsetenv \ menu caption dup ansi_caption[x] unsetenv \ ANSI caption dup menu_keycode[x] unsetenv \ menu keycode dup toggled_text[x] unsetenv \ toggle_menuitem caption dup toggled_ansi[x] unsetenv \ toggle_menuitem ANSI caption 48 \ Iterator start (inner range 48 to 57; ASCII '0' to '9') begin \ cycle_menuitem caption and ANSI caption 2dup menu_caption[x][y] unsetenv 2dup ansi_caption[x][y] unsetenv 1+ dup 57 > until drop \ inner iterator 0 over menukeyN ! \ used by menu-create, menu-display 0 over init_stateN ! \ used by menu-create 0 over toggle_stateN ! \ used by toggle_menuitem 0 over init_textN c! \ used by toggle_menuitem 0 over cycle_stateN ! \ used by cycle_menuitem 1+ dup 56 > \ increment, continue if less than 57 until drop \ iterator s" menu_timeout_command" unsetenv \ menu timeout command s" menu_reboot" unsetenv \ Reboot menu option flag s" menu_acpi" unsetenv \ ACPI menu option flag s" menu_kernel" unsetenv \ Kernel menu option flag s" menu_options" unsetenv \ Options separator flag s" menu_optionstext" unsetenv \ separator display text s" menu_init" unsetenv \ menu initializer 0 menureboot ! 0 menuacpi ! 0 menuoptions ! ; only forth definitions also menu-infrastructure \ This function both unsets menu variables and visually erases the menu area \ in-preparation for another menu. \ : menu-clear ( -- ) menu-unset menu-erase ; bullet menubllt ! also menu-namespace \ Initialize our menu initialization state variables 0 init_state1 ! 0 init_state2 ! 0 init_state3 ! 0 init_state4 ! 0 init_state5 ! 0 init_state6 ! 0 init_state7 ! 0 init_state8 ! \ Initialize our boolean state variables 0 toggle_state1 ! 0 toggle_state2 ! 0 toggle_state3 ! 0 toggle_state4 ! 0 toggle_state5 ! 0 toggle_state6 ! 0 toggle_state7 ! 0 toggle_state8 ! \ Initialize our array state variables 0 cycle_state1 ! 0 cycle_state2 ! 0 cycle_state3 ! 0 cycle_state4 ! 0 cycle_state5 ! 0 cycle_state6 ! 0 cycle_state7 ! 0 cycle_state8 ! \ Initialize string containers 0 init_text1 c! 0 init_text2 c! 0 init_text3 c! 0 init_text4 c! 0 init_text5 c! 0 init_text6 c! 0 init_text7 c! 0 init_text8 c! only forth definitions