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readline: switch => match

pull/2566/head
Don Alfons Nisnoni 2019-10-27 17:38:36 +08:00 committed by Alexander Medvednikov
parent 293cf18266
commit acaf66ac80
1 changed files with 55 additions and 52 deletions
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107
vlib/readline/readline_lin.v
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@ -150,38 +150,39 @@ pub fn read_line(prompt string) ?string {
} }
fn (r Readline) analyse(c int) Action { fn (r Readline) analyse(c int) Action {
switch c { match c {
case `\0`: return Action.eof `\0` { return Action.eof }
case 0x3 : return Action.eof // End of Text 0x3 { return Action.eof } // End of Text
case 0x4 : return Action.eof // End of Transmission 0x4 { return Action.eof } // End of Transmission
case 255 : return Action.eof 255 { return Action.eof }
case `\n`: return Action.commit_line `\n` { return Action.commit_line }
case `\r`: return Action.commit_line `\r` { return Action.commit_line }
case `\f`: return Action.clear_screen // CTRL + L `\f` { return Action.clear_screen } // CTRL + L
case `\b`: return Action.delete_left // Backspace `\b` { return Action.delete_left } // Backspace
case 127 : return Action.delete_left // DEL 127 { return Action.delete_left } // DEL
case 27 : return r.analyse_control() // ESC 27 { return r.analyse_control() } // ESC
case 1 : return Action.move_cursor_begining // ^A 1 { return Action.move_cursor_begining } // ^A
case 5 : return Action.move_cursor_end // ^E 5 { return Action.move_cursor_end } // ^E
case 26 : return Action.suspend // CTRL + Z, SUB 26 { return Action.suspend } // CTRL + Z, SUB
default : return if c >= ` ` { Action.insert_character } else { Action.nothing } else { return if c >= ` ` { Action.insert_character } else { Action.nothing } }
} }
} }
fn (r Readline) analyse_control() Action { fn (r Readline) analyse_control() Action {
c := r.read_char() c := r.read_char()
switch c { match c {
case `[`: `[` {
sequence := r.read_char() sequence := r.read_char()
switch sequence { match sequence {
case `C`: return Action.move_cursor_right `C` { return Action.move_cursor_right }
case `D`: return Action.move_cursor_left `D` { return Action.move_cursor_left }
case `B`: return Action.history_next `B` { return Action.history_next }
case `A`: return Action.history_previous `A` { return Action.history_previous }
case `1`: return r.analyse_extended_control() `1` { return r.analyse_extended_control() }
case `2`: return r.analyse_extended_control_no_eat(sequence) `2` { return r.analyse_extended_control_no_eat(sequence) }
case `3`: return r.analyse_extended_control_no_eat(sequence) `3` { return r.analyse_extended_control_no_eat(sequence) }
} }
}
} }
return Action.nothing return Action.nothing
} }
@ -189,47 +190,49 @@ fn (r Readline) analyse_control() Action {
fn (r Readline) analyse_extended_control() Action { fn (r Readline) analyse_extended_control() Action {
r.read_char() // Removes ; r.read_char() // Removes ;
c := r.read_char() c := r.read_char()
switch c { match c {
case `5`: `5` {
direction := r.read_char() direction := r.read_char()
switch direction { match direction {
case `C`: return Action.move_cursor_word_right `C` { return Action.move_cursor_word_right }
case `D`: return Action.move_cursor_word_left `D` { return Action.move_cursor_word_left }
} }
}
} }
return Action.nothing return Action.nothing
} }
fn (r Readline) analyse_extended_control_no_eat(last_c byte) Action { fn (r Readline) analyse_extended_control_no_eat(last_c byte) Action {
c := r.read_char() c := r.read_char()
switch c { match c {
case `~`: `~` {
switch last_c { match last_c {
case `3`: return Action.delete_right // Suppr key `3` { return Action.delete_right } // Suppr key
case `2`: return Action.overwrite `2` { return Action.overwrite }
} }
}
} }
return Action.nothing return Action.nothing
} }
fn (r mut Readline) execute(a Action, c int) bool { fn (r mut Readline) execute(a Action, c int) bool {
switch a { match a {
case Action.eof: return r.eof() Action.eof { return r.eof() }
case Action.insert_character: r.insert_character(c) Action.insert_character { r.insert_character(c) }
case Action.commit_line: return r.commit_line() Action.commit_line { return r.commit_line() }
case Action.delete_left: r.delete_character() Action.delete_left { r.delete_character() }
case Action.delete_right: r.suppr_character() Action.delete_right { r.suppr_character() }
case Action.move_cursor_left: r.move_cursor_left() Action.move_cursor_left { r.move_cursor_left() }
case Action.move_cursor_right: r.move_cursor_right() Action.move_cursor_right { r.move_cursor_right() }
case Action.move_cursor_begining: r.move_cursor_begining() Action.move_cursor_begining { r.move_cursor_begining() }
case Action.move_cursor_end: r.move_cursor_end() Action.move_cursor_end { r.move_cursor_end() }
case Action.move_cursor_word_left: r.move_cursor_word_left() Action.move_cursor_word_left { r.move_cursor_word_left() }
case Action.move_cursor_word_right: r.move_cursor_word_right() Action.move_cursor_word_right { r.move_cursor_word_right() }
case Action.history_previous: r.history_previous() Action.history_previous { r.history_previous() }
case Action.history_next: r.history_next() Action.history_next { r.history_next() }
case Action.overwrite: r.switch_overwrite() Action.overwrite { r.switch_overwrite() }
case Action.clear_screen: r.clear_screen() Action.clear_screen { r.clear_screen() }
case Action.suspend: r.suspend() Action.suspend { r.suspend() }
} }
return false return false
} }