refactors, comments, saving bytes
This commit is contained in:
parent
c237be7cbc
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408
femto.tal
408
femto.tal
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@ -92,19 +92,20 @@
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( zero page )
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|0000
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@counter $2
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( terminal size information )
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@term [
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&cols $2 ( relative x coordinate of cursor, from 0 )
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&rows $2 ( relative y coordinate of cursor, from 1 )
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]
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( configuration settings used when editing )
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@config [
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&tab-width $2 ( how many spaces to display tab chars )
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&insert-tabs $1 ( tab key inserts tabs when true )
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&color $2 ( digits of highlight color in reverse order )
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]
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( tracks information related to the buffer's view of data )
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@buffer [
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&limit $2 ( last byte of actual data (not including \0) + 1 )
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&offset $2 ( first byte of data visible in terminal )
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@ -118,6 +119,7 @@
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&row $2 ( current relative row value, 0-(height-1) )
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]
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( tracks overall editor state between events )
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@state [
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&key $1 ( last key read )
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&saw-esc $1 ( did we just see ESC? )
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@ -141,9 +143,10 @@
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&string $2 ( string to print for the prompt )
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]
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( temporary input buffer used for a variety of things )
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@tmp [
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&pos $2 ( temporary pointer to address when reading data )
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&data $40 ( small scratch pad when reading data )
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&data $80 ( small scratch pad when reading data )
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]
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( search uses .tmp/pos and .tmp/data to track query string )
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@ -161,6 +164,7 @@
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;init-zero-page JSR2
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;startup JMP2
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( import uxn regex library )
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~regex.tal
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( intialize zero page variables )
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@ -194,6 +198,11 @@
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&done POP2 nl
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dbg BRK
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( open the given file at editor start up )
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( )
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( this is called during startup by ;read-filename )
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( )
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( TODO: enable closing/opening files with editor already running )
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@open-file ( filename* -> )
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.File/name DEO2
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#c950 .File/length DEO2
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@ -207,6 +216,11 @@
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&ok .File/success DEI2 ;data ADD2 .buffer/limit STZ2
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JMP2r
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( ask the terminal for its size )
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( )
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( called during editor initialization by ;read-filename )
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( )
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( TODO: consider supporting terminal resizing )
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@setup-terminal-size ( -> )
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#03e7 DUP2 ;term-move-cursor JSR2
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;term-get-cursor-position JSR2
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@ -214,6 +228,9 @@
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;receive-terminal-size .Console/vector DEO2
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JMP2r
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( receive size information from the terminal )
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( )
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( called from Console/vector after ;setup-terminal-size )
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@receive-terminal-size ( -> )
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.Console/read DEI .state/key STZ
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.state/key LDZ .tmp/pos LDZ2 STA
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@ -221,6 +238,9 @@
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.state/key LDZ LIT 'R EQU ;parse-terminal-size JCN2
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BRK
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( parse and store terminal size information )
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( )
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( called by ;receive-terminal-size after complete message received )
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@parse-terminal-size ( -> )
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LIT2r 0000 LIT2r 0000
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.tmp/data LDZk #1b NEQ ,&parse-error JCN ( i ) INC
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@ -245,6 +265,10 @@
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&parse-error POP .tmp/data LDZ2
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;messages/term-size-parse-error ;error! JMP2
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( save count of number of lines in input file )
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( )
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( this method also detects whether \t characters are used, )
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( and uses this to initialize config/insert-tabs. )
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@setup-linecount ( -> )
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;data LIT2r 0001
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&loop DUP2 .buffer/limit LDZ2 EQU2 ,&done JCN
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@ -256,6 +280,14 @@
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STH2r .buffer/line-count STZ2
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JMP2r
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( reads filename from the program's argv )
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( )
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( currently femto must be given a file to edit, and reading this )
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( filename is the first thing that happens in ;startup. )
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( )
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( TODO: support other situations, such as: )
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( - launching femto without a file name )
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( - closing the given file and opening a new one )
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@read-filename ( -> )
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#12 DEI #0a EQU ,&execute JCN ( did we read \n ? )
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#12 DEI .tmp/pos LDZ2 STA ( no, so save in buffer )
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@ -269,16 +301,19 @@
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;setup-terminal-size JSR2 ( detect terminal dimensions )
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BRK
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( jump to beginning of line )
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@bol ( -> )
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#0000 .cursor/col STZ2
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;redraw-statusbar-and-cursor JSR2
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;return JMP2
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( jump to beginning of line )
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@eol ( -> )
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;cur-len JSR2 .cursor/col STZ2
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;redraw-statusbar-and-cursor JSR2
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;return JMP2
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( move forward by one character )
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@forward ( -> )
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;cur-pos JSR2 ;last-pos JSR2 GTH2 ;return JCN2
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;cur-col JSR2 ;cur-len JSR2 LTH2 ,&normal JCN
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@ -291,6 +326,11 @@
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;redraw-statusbar-and-cursor JSR2
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;return JMP2
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( move backward by one character )
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@back ( -> )
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;go-back JSR2 ;return JMP2
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( internal implementation shared by ;back and ;backspace )
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@go-back ( -> )
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;cur-pos JSR2 ;data EQU2 ,&noop JCN
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;cur-col JSR2 #0001 LTH2 ,&next-line JCN
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@ -303,9 +343,7 @@
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;redraw-statusbar-and-cursor JSR2
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&noop JMP2r
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@back ( -> )
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;go-back JSR2 ;return JMP2
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( move up by one line )
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@up ( -> )
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.cursor/row LDZ2 #0000 EQU2 ;return JCN2
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.cursor/row LDZ2 #0001 SUB2 .cursor/row STZ2
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@ -313,16 +351,16 @@
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;redraw-statusbar-and-cursor JSR2
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;return JMP2
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@last-abs-row ( -> n* )
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.buffer/line-count LDZ2 #0001 SUB2 JMP2r
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( move down by one line )
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@down ( -> )
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.cursor/row LDZ2 ;last-abs-row JSR2 EQU2 ;return JCN2
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.cursor/row LDZ2
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.buffer/line-count LDZ2 #0001 SUB2 EQU2 ;return JCN2
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.cursor/row LDZ2 INC2 .cursor/row STZ2
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;ensure-visible-cursor JSR2
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;redraw-statusbar-and-cursor JSR2
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;return JMP2
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( center buffer view on the current line )
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@center-view
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.term/rows LDZ2 INC2 #0002 DIV2 STH2k
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.cursor/row LDZ2 LTH2 ,&standard JCN
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@ -337,6 +375,7 @@
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&done
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;redraw-all JSR2 ;return JMP2
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( move up by one page )
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@page-up ( -> )
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.term/rows LDZ2 #0002 SUB2 STH2k
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.buffer/line-offset LDZ2 LTH2 ,&move-full JCN
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@ -352,7 +391,7 @@
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&done
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;redraw-all JSR2 ;return JMP2
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( move down by one page )
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@page-down
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;eof-is-visible JSR2 ,&near-eof JCN
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.term/rows LDZ2 #0002 SUB2 STH2k
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@ -366,6 +405,13 @@
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;cur-len JSR2 .cursor/col STZ2
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;redraw-cursor JSR2 ;return JMP2
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( return true if the end of the file is visible )
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@eof-is-visible ( -> bool^ )
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.buffer/line-offset LDZ2 .term/rows LDZ2 ADD2 INC2
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.buffer/line-count LDZ2
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GTH2 JMP2r
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( beginning quitting femto, prompting if unsaved changes )
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@quit
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#01 .state/quitting STZ
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.state/modified LDZ ,&is-modified JCN
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@ -374,11 +420,17 @@
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;messages/quit-prompt ;messages/null ;do-quit ;start-prompt JSR2
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;redraw-prompt-and-cursor JSR2 ;return JMP2
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( display two strings on the message line )
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( )
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( often this involves a static messages + an argument like ;tmp/data. )
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( )
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( use messages/null for the second string if only one is needed. )
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@send-message ( s1* s2* -> )
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#01 .state/message STZ
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;move-to-message-line JSR2
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SWP2 ;print JSR2 ;print JMP2
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( callback executed in response to the quit prompt. )
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@do-quit
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.tmp/data LDZ LIT 'n EQU ;quit-now JCN2
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.tmp/data LDZ LIT 'y EQU ;save JCN2
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@ -386,23 +438,38 @@
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;messages/unknown-input ;tmp/data ;send-message JSR2
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BRK
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( label that calls quit! )
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( )
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( this definition is needed so the address can be used by JCN2. )
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@quit-now quit!
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( label that calls BRK )
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( )
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( this definition is needed so the address can be used by JCN2. )
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@ignore
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( ;draw-cursor JSR2 ) BRK
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BRK
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( insert the given character at the cursor position )
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( )
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( this should not be called for newlines, see ;newline )
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@insert ( c^ -> )
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#01 .state/modified STZ
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;cur-pos JSR2 ;shift-right JSR2
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;cur-col JSR2 INC2 .cursor/col STZ2
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;redraw-all JSR2 ;return JMP2
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( insert the given character in the prompt )
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@insert-prompt ( c^ -> )
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.tmp/pos LDZ2 STH2k STA ( data[pos] <- c )
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INC2r #00 STH2kr STA ( data[pos+1] <- 0 )
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STH2r .tmp/pos STZ2 ( pos <- pos+1 )
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;redraw-prompt-and-cursor JSR2 ;return JMP2
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( insert a tab at the cursor position )
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( )
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( depending on the state of config/insert-tabs this will )
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( either call ;insert with \t or else insert a number of )
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( spaces based on .config/tab-width. )
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@insert-tab ( -> )
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#01 .state/modified STZ
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.config/insert-tabs LDZ ,&use-tabs JCN
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@ -417,7 +484,7 @@
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&use-tabs
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#09 ;insert JMP2
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( TODO: handle last line )
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( insert a newline at the cursor position )
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@newline ( c^ -> )
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#01 .state/modified STZ
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#0a ;cur-pos JSR2 ;shift-right JSR2
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@ -427,15 +494,12 @@
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;ensure-visible-cursor JSR2
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;redraw-all JSR2 ;return JMP2
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@eof-is-visible ( -> bool^ )
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.buffer/line-offset LDZ2 .term/rows LDZ2 ADD2 INC2
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.buffer/line-count LDZ2
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GTH2 JMP2r
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( delete the character to the left of the cursor, if any )
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@backspace ( -> )
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;cur-pos JSR2 ;data EQU2 ;return JCN2
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;go-back JSR2 ;delete JMP2
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( delete the last character in the prompt )
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@backspace-prompt ( -> )
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.tmp/pos LDZ2 ;tmp/data EQU2 ,&skip JCN ( ;return JCN2 )
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#00 .tmp/pos LDZ2 #0001 SUB2 ( 0 pos-1 )
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@ -443,6 +507,7 @@
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STH2r .tmp/pos STZ2 ( pos <- pos-1 )
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&skip ;redraw-prompt-and-cursor JSR2 ;return JMP2
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( delete the character under the cursor, if any )
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@delete ( -> )
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#01 .state/modified STZ
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;last-pos JSR2 ;cur-pos JSR2 LTH2 ;return JCN2
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@ -452,9 +517,17 @@
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.buffer/line-count LDZ2k #0001 SUB2 ROT STZ2
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¬-newline ;redraw-all JSR2 ;return JMP2
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( used at the start of an escape sequence to set up state. )
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( )
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( many keys such as page-down will actually send an escape character )
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( followed by others. to support these we use saw-esc to interpret )
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( input characters differently. )
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( )
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( see also state/saw-xterm which supports such sequences. )
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@escape ( -> )
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#01 .state/saw-esc STZ BRK
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( move to the end of the file )
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@goto-end ( -> )
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.buffer/line-count LDZ2 #0001 SUB2 .cursor/row STZ2
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.buffer/line-count LDZ2 .term/rows LDZ2 LTH2k ,&use-zero JCN
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@ -467,15 +540,20 @@
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;cur-len JSR2 .cursor/col STZ2
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;redraw-all JSR2 ;return JMP2
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( move to the start of the file )
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@goto-start ( -> )
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;zero-row JSR2
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#0000 .cursor/col STZ2
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;redraw-all JSR2 ;return JMP2
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( prompt for a line number and move to that line )
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@goto-line ( -> )
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;messages/goto-line ;messages/null ;do-goto-line ;start-prompt JSR2
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;redraw-prompt-and-cursor JSR2 ;return JMP2
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( parse the given string as a decimal number )
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( )
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( returns the number as a short followed by whether parsing was ok )
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@parse-decimal-number ( addr* -> n* ok^ )
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LDAk ,&non-empty JCN
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#00 JMP2r
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@ -493,8 +571,10 @@
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&fail
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POP2r #00 JMP2r
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@do-goto-line
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( go to the given line number )
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( )
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( this is used as a callback from the goto-line prompt )
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@do-goto-line ( n* -> )
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;tmp/data ;parse-decimal-number JSR2
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,&ok JCN
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;messages/unknown-input ;tmp/data ;send-message JSR2
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@ -507,10 +587,16 @@
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;jump-to-line JSR2
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;redraw-all JSR2 ;return JMP2
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( move the cursor to the given coordinates )
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( )
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( this won't move the display if the given coordinates are visible. )
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@move-to-coord ( col* row* -> )
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DUP2 ;line-is-visible JSR2 ;jump-to-coord/short JCN2
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;jump-to-coord JMP2
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( move the cursor to the given coordinates )
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( )
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( this will always ensure the display is centered on the given coordinates )
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@jump-to-coord ( x* y* -> )
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.term/rows LDZ2 INC2 #0002 DIV2 LTH2k ( x y rows/2 y<rows/2? ) ,&early JCN
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OVR2 SWP2 SUB2 ( x y y-rows/2 )
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@ -535,9 +621,14 @@
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.cursor/col STZ2
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JMP2r
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( jump to the given line number )
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@jump-to-line ( n* -> )
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#0000 SWP2 ;jump-to-coord JMP2
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( ensure the cursor is visibe )
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( )
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( if the cursor is not already visible the screen will be )
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( centered on the cursor's coordinates. )
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@ensure-visible-cursor
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.cursor/row LDZ2 .buffer/line-offset LDZ2
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SUB2 .term/rows LDZ2 LTH2 ,&noop JCN
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@ -545,13 +636,27 @@
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;redraw-all JSR2
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&noop JMP2r
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( currently used to print stack information. )
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@debug
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;messages/rel-line-error ;error! JMP2
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( move the terminal's cursor to the message line )
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( )
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( this low level method does not change any editor state (such as )
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( the cursor) but is used to display messages. )
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@move-to-message-line ( -> )
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#0000 .term/rows LDZ2 #0002 ADD2 ;term-move-cursor JMP2
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( when called vector should end in BRK )
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( start a prompt on the message line )
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( )
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( the arguments are as follows: )
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( - the prompt string will printed in bold )
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( - the default string will be editable )
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( - the vector address will be used on return )
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( )
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( prompts can always be cancelled using C-g. )
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( )
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( when called vector should end in a BRK instructinon. )
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@start-prompt ( prompt* default* vector* -> )
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.prompt/active LDZ ,&is-active JCN
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#01 .prompt/active STZ ( prompt/active <- 1 )
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@ -572,18 +677,22 @@
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;redraw-prompt-and-cursor JSR2
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;return JMP2
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( when called vector should end in BRK )
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( finishes prompt and executes callback )
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( )
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( when called vector should end in a BRK instruction )
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@finish-prompt ( -> )
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#00 .prompt/active STZ
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;clear-message-line JSR2
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;redraw-prompt-and-cursor JSR2
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.prompt/vector LDZ2 JMP2
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( begin saving the file, prompting the user for a fiel name )
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@save
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;messages/save-prompt ;filename ;do-save ;start-prompt JSR2
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;redraw-prompt-and-cursor JSR2
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;return JMP2
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( save the file with the filename found in tmp/data )
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@do-save ( -> )
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.buffer/limit LDZ2 ;data SUB2 STH2 ( [size] )
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;tmp/data .File/name DEO2
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@ -601,11 +710,13 @@
|
|||
.state/quitting LDZ ;quit-now JCN2
|
||||
;return JMP2
|
||||
|
||||
( begin a search, prompting for a search string )
|
||||
@search ( -> )
|
||||
;messages/search-prompt ;messages/null ;do-search ;start-prompt JSR2
|
||||
;redraw-prompt-and-cursor JSR2
|
||||
;return JMP2
|
||||
|
||||
( execute a search, using the given search string )
|
||||
@do-search ( -> )
|
||||
.cursor/row LDZ2 .searching/orig-row STZ2
|
||||
.cursor/col LDZ2 .searching/orig-col STZ2
|
||||
|
|
@ -618,10 +729,14 @@
|
|||
;redraw-matches JSR2
|
||||
;return JMP2
|
||||
|
||||
( begin a search, prompting for a regular expression )
|
||||
@regex-search ( -> )
|
||||
;messages/regex-search-prompt ;messages/null ;do-regex-search ;start-prompt JSR2
|
||||
;redraw-prompt-and-cursor JSR2 ;return JMP2
|
||||
|
||||
( execute a search, using the given regular expressions )
|
||||
( )
|
||||
( TODO: handle invalid regular expressions that fail to compile )
|
||||
@do-regex-search ( -> )
|
||||
;cur-pos JSR2 DUP2 .searching/start STZ2 .searching/end STZ2
|
||||
.cursor/row LDZ2 .searching/orig-row STZ2
|
||||
|
|
@ -635,16 +750,35 @@
|
|||
;redraw-matches JSR2
|
||||
;return JMP2
|
||||
|
||||
( toggle the color used by the terminal )
|
||||
( )
|
||||
( available colors are: )
|
||||
( - black )
|
||||
( - red )
|
||||
( - green )
|
||||
( - yellow )
|
||||
( - blue )
|
||||
( - magenta )
|
||||
( - cyan )
|
||||
( - white )
|
||||
@toggle-color ( -> )
|
||||
.config/color LDZ2 #3733 EQU2 ,&wrap-around JCN
|
||||
.config/color LDZ2 #0100 ADD2 .config/color STZ2 ,&done JMP
|
||||
&wrap-around #3033 .config/color STZ2
|
||||
&done ;redraw-all JSR2 ;return JMP2
|
||||
|
||||
( toggle whether to use literal tab characters )
|
||||
( )
|
||||
( when opening a file, this defaults to 01 if existing tab )
|
||||
( characters are found, and 00 otherwise. )
|
||||
@toggle-tabs ( -> )
|
||||
.config/insert-tabs LDZk #01 EOR SWP STZ
|
||||
;redraw-statusbar-and-cursor JSR2 ;return JMP2
|
||||
|
||||
( interpret user input as an escaped sequence )
|
||||
( )
|
||||
( called by on-key with state/saw-esc is true )
|
||||
( )
|
||||
( TODO: M-f and M-b for next/previous word )
|
||||
( M-n and M-p for next/previous paragraph )
|
||||
( maybe M-% for search&replace )
|
||||
|
|
@ -660,9 +794,22 @@
|
|||
.state/key LDZ LIT '[ EQU ( M-[ ) ;xterm JCN2
|
||||
BRK
|
||||
|
||||
( set our input to expect xterm control sequences )
|
||||
( )
|
||||
( after seeing ESC followed by [ we expect various )
|
||||
( ANSI or xterm control sequences. these include )
|
||||
( things like: )
|
||||
( - up/down/left/right arrow keys )
|
||||
( - page up/page down keys )
|
||||
( - end/home keys )
|
||||
@xterm
|
||||
#01 .state/saw-xterm STZ BRK
|
||||
|
||||
( after seeing sequences like "ESC [ 1" we expect )
|
||||
( to see a trailing ~ to complete the sequence. )
|
||||
( )
|
||||
( this callback checks for and if set performs )
|
||||
( the relevant action. )
|
||||
@on-key-vt ( -> )
|
||||
.state/saw-vt LDZk STH #00 SWP STZ
|
||||
.state/key LDZ LIT '~ EQU ,&ok JCN
|
||||
|
|
@ -687,6 +834,12 @@
|
|||
¬-8
|
||||
( ??? ) POP BRK
|
||||
|
||||
( after seeing sequences like "ESC [" we expect )
|
||||
( to see more characters to determine the logical key. )
|
||||
( )
|
||||
( this callback performs the relevant action, )
|
||||
( or else sets (or unsets) state as necessary )
|
||||
( to continue (or end) the sequence. )
|
||||
@on-key-xterm ( -> )
|
||||
#00 .state/saw-xterm STZ
|
||||
.state/key LDZ LIT 'A EQU ( ^[[A -> up ) ;up JCN2
|
||||
|
|
@ -700,9 +853,17 @@
|
|||
.state/key LDZ .state/saw-vt STZ ( ^[[1 through ^[[8 )
|
||||
BRK
|
||||
|
||||
( ANSI control sequence to clear the current line )
|
||||
@clear-line ( -> )
|
||||
ansi emit-2 emit-K JMP2r
|
||||
|
||||
( clear the message line )
|
||||
( )
|
||||
( this includes the code needed to move the cursor )
|
||||
( to that line, the ANSI control sequence to clear )
|
||||
( the line, and unsetting state/message. )
|
||||
( )
|
||||
( if state/message is unset this is a no-op. )
|
||||
@clear-message-line
|
||||
.state/message LDZ #00 EQU ,&done JCN
|
||||
;move-to-message-line JSR2
|
||||
|
|
@ -710,12 +871,20 @@
|
|||
#00 .state/message STZ
|
||||
&done JMP2r
|
||||
|
||||
( cancel the active search )
|
||||
( )
|
||||
( this method unsets searching/active and also restores )
|
||||
( the original cursor position. )
|
||||
@cancel-search
|
||||
#00 .searching/active STZ
|
||||
.searching/orig-row LDZ2 ;jump-to-line JSR2
|
||||
.searching/orig-col LDZ2 .cursor/col STZ2
|
||||
;redraw-all JSR2 ;return JMP2
|
||||
|
||||
( cancel the active search )
|
||||
( )
|
||||
( this method unsets searching/active. unlike ;cancel-search )
|
||||
( this leaves the cursor where it is. )
|
||||
@finish-search
|
||||
#00 .searching/active STZ
|
||||
;redraw-all JSR2 ;return JMP2
|
||||
|
|
@ -725,19 +894,35 @@
|
|||
( a global list of all matches, which means that currently )
|
||||
( it can change in response to e.g. cursor position when )
|
||||
( matches overlap. )
|
||||
( )
|
||||
( UPDATE: now that we have searching/start and searching/end )
|
||||
( we can use those to resume the search after the full match. )
|
||||
( this solves the problem except in some very strange cases )
|
||||
( which are quite unlikely. )
|
||||
|
||||
( jump forward to the next match, if any. )
|
||||
( )
|
||||
( moves the cursor forward to the next match. if there are no )
|
||||
( further matches the cursor does not move. )
|
||||
@jump-to-next-match ( -> )
|
||||
.searching/regex LDZ2 ORA ,&is-regex JCN
|
||||
;move-to-next-match JSR2 POP ;return JMP2
|
||||
&is-regex
|
||||
;move-to-next-regex-match JSR2 POP ;return JMP2
|
||||
|
||||
( jump backward to the previous match, if any. )
|
||||
( )
|
||||
( moves the cursor backward to the previous match. if there are )
|
||||
( no further matches the cursor does not move. )
|
||||
@jump-to-prev-match ( -> )
|
||||
.searching/regex LDZ2 ORA ,&is-regex JCN
|
||||
;move-to-prev-match JSR2 POP ;return JMP2
|
||||
&is-regex
|
||||
;move-to-prev-regex-match JSR2 POP ;return JMP2
|
||||
|
||||
( move to the next substring match. )
|
||||
( )
|
||||
( called by ;jump-to-next-match. )
|
||||
@move-to-next-match ( -> ok^ )
|
||||
.buffer/limit LDZ2
|
||||
;cur-pos JSR2 INC2
|
||||
|
|
@ -751,6 +936,9 @@
|
|||
&fail
|
||||
POP2 POP2 #00 JMP2r
|
||||
|
||||
( move to the previous substring match. )
|
||||
( )
|
||||
( called by ;jump-to-prev-match. )
|
||||
@move-to-prev-match ( -> ok^ )
|
||||
;data
|
||||
;cur-pos JSR2 #0001 SUB2
|
||||
|
|
@ -764,6 +952,9 @@
|
|||
&fail
|
||||
POP2 POP2 #00 JMP2r
|
||||
|
||||
( move to the next regex match. )
|
||||
( )
|
||||
( called by ;jump-to-next-match. )
|
||||
@move-to-next-regex-match ( -> ok^ )
|
||||
.searching/end LDZ2 .buffer/limit LDZ2 OVR2
|
||||
GTH2 ,&ok JCN
|
||||
|
|
@ -776,6 +967,10 @@
|
|||
;search-start LDA2 DUP2 .searching/start STZ2
|
||||
;jump-to-pos JSR2 #01 JMP2r
|
||||
|
||||
( move to the previous substring match. )
|
||||
( )
|
||||
( called by ;jump-to-prev-match. )
|
||||
( )
|
||||
( compared to move-to-next-regex-match this is kind of inefficient. )
|
||||
( that's because we have no easy way to search backwards from a point. )
|
||||
( )
|
||||
|
|
@ -802,6 +997,13 @@
|
|||
&fail
|
||||
JMP2r
|
||||
|
||||
( on-key event handler to use when searching )
|
||||
( )
|
||||
( when searching the user can: )
|
||||
( - move to the next match (n or C-s) )
|
||||
( - move to the previous match (p or C-r) )
|
||||
( - end the search leaving the cursor where it is (enter) )
|
||||
( - cancel the search restoring the cursor (C-g) )
|
||||
@on-key-searching
|
||||
.state/key LDZ #07 EQU ( C-g ) ;cancel-search JCN2
|
||||
.state/key LDZ #0d EQU ( \r ) ;finish-search JCN2
|
||||
|
|
@ -811,6 +1013,19 @@
|
|||
.state/key LDZ #70 EQU ( p ) ;jump-to-prev-match JCN2
|
||||
;ignore JMP2
|
||||
|
||||
( on-key event handler to use when prompt is active )
|
||||
( )
|
||||
( when the prompt is active the user can: )
|
||||
( - append characters to the input string )
|
||||
( - delete from the end of the input string (backspace) )
|
||||
( - complete the input and act (enter) )
|
||||
( - cancel the prompt without action (C-g) )
|
||||
( )
|
||||
( TODO: currently it's impossible to edit the prompt )
|
||||
( except from the end. ideally we'd support most of the )
|
||||
( same navigation commands as we do in the buffer, such as )
|
||||
( C-a, C-d, etc. however, it's enough extra work to enable )
|
||||
( this that for now i haven't done it. )
|
||||
@on-key-prompt
|
||||
.state/key LDZ #07 EQU ( C-g ) ;cancel-prompt JCN2
|
||||
.state/key LDZ #0d EQU ( \r ) ;finish-prompt JCN2
|
||||
|
|
@ -820,7 +1035,19 @@
|
|||
.state/key LDZ ( printable ASCII ) ;insert-prompt JMP2
|
||||
BRK
|
||||
|
||||
( on-key event handler )
|
||||
( )
|
||||
( this is the "normal" event handler to use for editing )
|
||||
( the buffer. it checks various state values to determine )
|
||||
( if we're in the midst of a control sequence, if we're )
|
||||
( searching or have an active prompt, etc. )
|
||||
( )
|
||||
( TODO: C-h for help )
|
||||
( )
|
||||
( you could also imagine building data structures of )
|
||||
( commands to unify input strings, help text, callbacks, )
|
||||
( and so on. this might ultimately be more efficient but )
|
||||
( for now what we have works. )
|
||||
@on-key
|
||||
.Console/read DEI .state/key STZ
|
||||
;clear-message-line JSR2
|
||||
|
|
@ -850,26 +1077,41 @@
|
|||
.state/key LDZ #7e GTH ;ignore JCN2 ( ignore for now )
|
||||
.state/key LDZ ( printable ASCII ) ;insert JMP2
|
||||
|
||||
( return the smaller of two short values )
|
||||
@min2 ( x* y* -> min* )
|
||||
LTH2k JMP SWP2 POP2 JMP2r
|
||||
|
||||
( ANSI control sequence to move the cursor to the given coord )
|
||||
@term-move-cursor ( col* row* -> )
|
||||
ansi INC2 ( row+1 ) ;emit-dec2 JSR2
|
||||
emit-; INC2 ( col+1 ) ;emit-dec2 JSR2
|
||||
emit-H JMP2r
|
||||
|
||||
( ANSI control sequence to move N positions right )
|
||||
@term-move-right ( n* -> )
|
||||
ansi ;emit-dec2 JSR2 emit-C JMP2r
|
||||
|
||||
( ANSI control sequence to get the cursor position )
|
||||
@term-get-cursor-position ( -> )
|
||||
ansi emit-6 emit-n JMP2r
|
||||
|
||||
( ANSI control sequence to erase entire screen )
|
||||
@term-erase-all ( -> )
|
||||
ansi emit-2 emit-J JMP2r
|
||||
|
||||
( method to add bits to the redraw register )
|
||||
( )
|
||||
( state/redraw uses 8 bits to represent which parts )
|
||||
( of the screen (if any) should be redrawn. this method )
|
||||
( uses logical-or (ORA) to add the bits of n to those )
|
||||
( already set. )
|
||||
@redraw-add ( n^ -> )
|
||||
.state/redraw LDZk ROT ORA SWP STZ JMP2r
|
||||
|
||||
( various redrawing methods )
|
||||
( )
|
||||
( these don't perform a redraw right away, but instead )
|
||||
( signal that the next drawing should include that part. )
|
||||
@redraw-cursor ( -> ) #01 ;redraw-add JMP2
|
||||
@redraw-statusbar ( -> ) #02 ;redraw-add JMP2
|
||||
@redraw-statusbar-and-cursor ( -> ) #03 ;redraw-add JMP2
|
||||
|
|
@ -877,6 +1119,7 @@
|
|||
@redraw-matches ( -> ) #08 ;redraw-add JMP2
|
||||
@redraw-all ( -> ) #1f ;redraw-add JMP2
|
||||
|
||||
( draw the current cursor location )
|
||||
@draw-cursor ( -> )
|
||||
.prompt/active LDZ ,&on-prompt JCN
|
||||
( TODO: handle long lines )
|
||||
|
|
@ -887,7 +1130,8 @@
|
|||
JMP2r
|
||||
|
||||
( current column in terms of display width )
|
||||
( this is different due to tabs )
|
||||
( )
|
||||
( this is different than ;cur-col due to tabs )
|
||||
@cur-w-col ( -> col* )
|
||||
LIT2r 0000 ( [0] )
|
||||
;cur-line JSR2 DUP2 ;cur-col JSR2 ADD2 SWP2 ( lim s [0] )
|
||||
|
|
@ -896,45 +1140,45 @@
|
|||
&next LDAk #09 EQU ,&tabs JCN INC2 INC2r ,&loop JMP
|
||||
&tabs INC2 .config/tab-width LDZ2 STH2 ADD2r ,&loop JMP
|
||||
|
||||
( display ** if the buffer has unsaved changes, -- otherwise )
|
||||
@get-save-status
|
||||
.state/modified LDZ ,&is-modified JCN
|
||||
;messages/saved JMP2r
|
||||
&is-modified ;messages/unsaved JMP2r
|
||||
;messages/unsaved ;messages/saved
|
||||
.state/modified LDZ JMP SWP2 POP2 JMP2r
|
||||
|
||||
( display [t] if the file uses tabs, [s] otherwise )
|
||||
@get-tab-status
|
||||
.config/insert-tabs LDZ ,&tabs JCN
|
||||
;messages/st-spaces JMP2r
|
||||
&tabs ;messages/st-tabs JMP2r
|
||||
;messages/st-tabs ;messages/st-spaces
|
||||
.config/insert-tabs LDZ JMP SWP2 POP2 JMP2r
|
||||
|
||||
( move the terminal cursor to the statusbar line )
|
||||
@move-to-statusbar ( -> )
|
||||
#0000 .term/rows LDZ2 ;term-move-cursor JMP2
|
||||
|
||||
( draw the full statusbar )
|
||||
@draw-statusbar ( -> )
|
||||
#0000 .term/rows LDZ2 ;term-move-cursor JSR2
|
||||
;move-to-statusbar JSR2
|
||||
;emit-color-reverse JSR2
|
||||
LIT2r 2018
|
||||
.term/cols LDZ2 #0000
|
||||
&loop GTH2k ,&continue JCN ,&done JMP
|
||||
&continue DEOkr INC2 ,&loop JMP
|
||||
&done POP2 POP2 POP2r
|
||||
|
||||
#0000 .term/rows LDZ2 ;term-move-cursor JSR2
|
||||
LIT2r 2018 .term/cols LDZ2 #0001 ( cols i [2018] )
|
||||
&loop LTH2k ,&done JCN DEOkr INC2 ,&loop JMP
|
||||
&done POP2 POP2 POP2r ( )
|
||||
|
||||
;move-to-statusbar JSR2
|
||||
;get-save-status JSR2 ;print JSR2
|
||||
;filename ;print JSR2
|
||||
sp
|
||||
emit-[
|
||||
sp emit-[
|
||||
.buffer/limit LDZ2 ;data SUB2 ;emit-dec2 JSR2
|
||||
;messages/bytes ;print JSR2
|
||||
sp
|
||||
.buffer/line-count LDZ2 ;emit-dec2 JSR2
|
||||
;messages/lines ;print JSR2
|
||||
sp
|
||||
emit-(
|
||||
sp emit-(
|
||||
;cur-col JSR2 INC2 ;emit-dec2 JSR2
|
||||
emit-,
|
||||
.cursor/row LDZ2 INC2 ;emit-dec2 JSR2
|
||||
emit-)
|
||||
sp
|
||||
emit-) sp
|
||||
;get-tab-status JSR2 ;print JSR2
|
||||
;emit-reset JSR2
|
||||
JMP2r
|
||||
;emit-reset JMP2
|
||||
|
||||
@draw-prompt ( -> )
|
||||
;clear-message-line JSR2
|
||||
|
|
@ -957,15 +1201,11 @@
|
|||
|
||||
@matches-at ( s* -> limit* )
|
||||
LIT2r :tmp/data
|
||||
&loop
|
||||
LDAkr STHr ,&non-zero JCN ,&done JMP
|
||||
&non-zero
|
||||
&loop LDAkr STHr #00 EQU ,&done JCN
|
||||
LDAk LDAkr STHr NEQ ,&fail JCN
|
||||
INC2 INC2r ,&loop JMP
|
||||
&done
|
||||
POP2r JMP2r
|
||||
&fail
|
||||
POP2r POP2 #0000 JMP2r
|
||||
&fail POP2 #0000
|
||||
&done POP2r JMP2r
|
||||
|
||||
@draw-region ( offset* limit* col* row* -> )
|
||||
OVR2 ( offset limit col row col )
|
||||
|
|
@ -1121,7 +1361,7 @@
|
|||
&skip-8 DUP #04 AND ,&do-4 JCN ,&skip-4 JMP &do-4 ;draw-prompt JSR2
|
||||
&skip-4 DUP #02 AND ,&do-2 JCN ,&skip-2 JMP &do-2 ;draw-statusbar JSR2
|
||||
&skip-2 DUP #01 AND ,&do-1 JCN ,&finish JMP &do-1 ;draw-cursor JSR2 ,&finish JMP
|
||||
&draw-all .counter LDZ2k INC2 ROT STZ2 ;draw-all JSR2
|
||||
&draw-all ;draw-all JSR2
|
||||
&finish POP #00 .state/redraw STZ BRK
|
||||
|
||||
@str-copy ( src* dst* -> )
|
||||
|
|
@ -1202,6 +1442,7 @@
|
|||
@rel-line ( y* -> s* )
|
||||
.buffer/offset LDZ2 SWP2 ;line-to-pos JMP2
|
||||
|
||||
( return a pointer to the current line )
|
||||
@cur-line ( -> s* )
|
||||
.cursor/row LDZ2 .buffer/line-offset LDZ2 SUB2k
|
||||
.term/rows LDZ2 LTH2 ,&ok JCN
|
||||
|
|
@ -1209,9 +1450,11 @@
|
|||
&ok
|
||||
SUB2 ;rel-line JMP2
|
||||
|
||||
( return a pointer to the current cursor position )
|
||||
@cur-pos ( -> s* )
|
||||
;cur-line JSR2 ;cur-col JSR2 ADD2 JMP2r
|
||||
|
||||
( insert one character at the cursor position )
|
||||
@shift-right ( c^ addr* -> )
|
||||
ROT STH ( addr [prev^] )
|
||||
;last-pos JSR2 SWP2 ( last addr [prev^] )
|
||||
|
|
@ -1226,6 +1469,8 @@
|
|||
.buffer/limit STZ2 ( )
|
||||
JMP2r
|
||||
|
||||
( remove one character at the cursor position )
|
||||
( )
|
||||
( TODO: change last/addr order and GTH -> LTH to remove hack )
|
||||
@shift-left ( addr* -> )
|
||||
;last-pos JSR2 SWP2 ( last addr )
|
||||
|
|
@ -1244,46 +1489,42 @@
|
|||
@cur-col ( -> col* )
|
||||
.cursor/col LDZ2 ;cur-len JSR2 ;min2 JMP2
|
||||
|
||||
( jump to the first line in the buffer )
|
||||
@zero-row ( -> )
|
||||
;data .buffer/offset STZ2
|
||||
#0000 .buffer/line-offset STZ2
|
||||
#0000 .cursor/row STZ2
|
||||
JMP2r
|
||||
|
||||
( return the location of the last character in the buffer )
|
||||
@last-pos ( -> addr* )
|
||||
.buffer/limit LDZ2 #0001 SUB2 JMP2r
|
||||
|
||||
@mod-div2 ( x^ y^ -> x%d x/y )
|
||||
DIV2k STH2k MUL2 SUB2 STH2r JMP2r
|
||||
|
||||
@emit-digit ( n^ -> )
|
||||
LIT '0 ADD emit JMP2r
|
||||
|
||||
( emit a short as a decimal )
|
||||
@emit-dec2 ( n* -> )
|
||||
DUP2 #270f GTH2 ,&do5 JCN
|
||||
DUP2 #03e7 GTH2 ,&do4 JCN
|
||||
DUP2 #0063 GTH2 ,&do3 JCN
|
||||
DUP2 #0009 GTH2 ,&do2 JCN
|
||||
,&do1 JMP
|
||||
&do5 #2710 ;mod-div2 JSR2 NIP ;emit-digit JSR2
|
||||
&do4 #03e8 ;mod-div2 JSR2 NIP ;emit-digit JSR2
|
||||
&do3 #0064 ;mod-div2 JSR2 NIP ;emit-digit JSR2
|
||||
&do2 #000a ;mod-div2 JSR2 NIP ;emit-digit JSR2
|
||||
&do1 NIP ;emit-digit JMP2
|
||||
LITr 00 ( n [0] )
|
||||
&read ( n [k] )
|
||||
#000a DIV2k STH2k MUL2 SUB2 STH2r INCr ( n%10 n/10 [k+1] )
|
||||
DUP2 ORA ,&read JCN
|
||||
POP2 ( top element was 0000 )
|
||||
&write ( n0 n1 ... nk [k+1] )
|
||||
NIP #30 ADD #18 DEO LITr 01 SUBr ( n0 ... n{k-1} [k] )
|
||||
STHkr ,&write JCN
|
||||
POPr JMP2r
|
||||
|
||||
( emit a short as a decimal with leading spaces )
|
||||
@emit-dec2-pad ( n* -> )
|
||||
LIT2r 2018 ( preload #20 .Console/write into rst )
|
||||
DUP2 #270f GTH2 ,&do5 JCN DEOkr
|
||||
DUP2 #03e7 GTH2 ,&do4 JCN DEOkr
|
||||
DUP2 #0063 GTH2 ,&do3 JCN DEOkr
|
||||
DUP2 #0009 GTH2 ,&do2 JCN DEOkr
|
||||
,&do1 JMP
|
||||
&do5 #2710 ;mod-div2 JSR2 NIP ;emit-digit JSR2
|
||||
&do4 #03e8 ;mod-div2 JSR2 NIP ;emit-digit JSR2
|
||||
&do3 #0064 ;mod-div2 JSR2 NIP ;emit-digit JSR2
|
||||
&do2 #000a ;mod-div2 JSR2 NIP ;emit-digit JSR2
|
||||
&do1 NIP ;emit-digit JSR2
|
||||
DEOr JMP2r
|
||||
#00 ,&zero STR
|
||||
#2710 ,&parse JSR
|
||||
#03e8 ,&parse JSR
|
||||
#0064 ,&parse JSR
|
||||
#000a ,&parse JSR
|
||||
,&emit JSR POP sp JMP2r
|
||||
&parse DIV2k DUP ,&emit JSR MUL2 SUB2 JMP2r
|
||||
&emit DUP [ LIT &zero $1 ] #0000 EQU2 ,&skip JCN
|
||||
#01 ,&zero STR
|
||||
#30 ADD #18 DEO JMP2r
|
||||
&skip POP sp JMP2r
|
||||
|
||||
( various string constants used as messages for the user )
|
||||
@messages [ &null 00
|
||||
|
|
@ -1307,5 +1548,8 @@
|
|||
&st-spaces "[s] 00
|
||||
]
|
||||
|
||||
@filename $80 ( path to file being edited )
|
||||
@data $c950 ( actual file data to be edited )
|
||||
( path to file being edited )
|
||||
@filename $80
|
||||
|
||||
( actual file data to be edited )
|
||||
@data $c950
|
||||
|
|
|
|||
Loading…
Reference in New Issue