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readline: switch => match

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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 {
switch c {
case `\0`: return Action.eof
case 0x3 : return Action.eof // End of Text
case 0x4 : return Action.eof // End of Transmission
case 255 : return Action.eof
case `\n`: return Action.commit_line
case `\r`: return Action.commit_line
case `\f`: return Action.clear_screen // CTRL + L
case `\b`: return Action.delete_left // Backspace
case 127 : return Action.delete_left // DEL
case 27 : return r.analyse_control() // ESC
case 1 : return Action.move_cursor_begining // ^A
case 5 : return Action.move_cursor_end // ^E
case 26 : return Action.suspend // CTRL + Z, SUB
default : return if c >= ` ` { Action.insert_character } else { Action.nothing }
match c {
`\0` { return Action.eof }
0x3 { return Action.eof } // End of Text
0x4 { return Action.eof } // End of Transmission
255 { return Action.eof }
`\n` { return Action.commit_line }
`\r` { return Action.commit_line }
`\f` { return Action.clear_screen } // CTRL + L
`\b` { return Action.delete_left } // Backspace
127 { return Action.delete_left } // DEL
27 { return r.analyse_control() } // ESC
1 { return Action.move_cursor_begining } // ^A
5 { return Action.move_cursor_end } // ^E
26 { return Action.suspend } // CTRL + Z, SUB
else { return if c >= ` ` { Action.insert_character } else { Action.nothing } }
}
}
fn (r Readline) analyse_control() Action {
c := r.read_char()
switch c {
case `[`:
match c {
`[` {
sequence := r.read_char()
switch sequence {
case `C`: return Action.move_cursor_right
case `D`: return Action.move_cursor_left
case `B`: return Action.history_next
case `A`: return Action.history_previous
case `1`: return r.analyse_extended_control()
case `2`: return r.analyse_extended_control_no_eat(sequence)
case `3`: return r.analyse_extended_control_no_eat(sequence)
match sequence {
`C` { return Action.move_cursor_right }
`D` { return Action.move_cursor_left }
`B` { return Action.history_next }
`A` { return Action.history_previous }
`1` { return r.analyse_extended_control() }
`2` { return r.analyse_extended_control_no_eat(sequence) }
`3` { return r.analyse_extended_control_no_eat(sequence) }
}
}
}
return Action.nothing
}
@ -189,47 +190,49 @@ fn (r Readline) analyse_control() Action {
fn (r Readline) analyse_extended_control() Action {
r.read_char() // Removes ;
c := r.read_char()
switch c {
case `5`:
match c {
`5` {
direction := r.read_char()
switch direction {
case `C`: return Action.move_cursor_word_right
case `D`: return Action.move_cursor_word_left
match direction {
`C` { return Action.move_cursor_word_right }
`D` { return Action.move_cursor_word_left }
}
}
}
return Action.nothing
}
fn (r Readline) analyse_extended_control_no_eat(last_c byte) Action {
c := r.read_char()
switch c {
case `~`:
switch last_c {
case `3`: return Action.delete_right // Suppr key
case `2`: return Action.overwrite
match c {
`~` {
match last_c {
`3` { return Action.delete_right } // Suppr key
`2` { return Action.overwrite }
}
}
}
return Action.nothing
}
fn (r mut Readline) execute(a Action, c int) bool {
switch a {
case Action.eof: return r.eof()
case Action.insert_character: r.insert_character(c)
case Action.commit_line: return r.commit_line()
case Action.delete_left: r.delete_character()
case Action.delete_right: r.suppr_character()
case Action.move_cursor_left: r.move_cursor_left()
case Action.move_cursor_right: r.move_cursor_right()
case Action.move_cursor_begining: r.move_cursor_begining()
case Action.move_cursor_end: r.move_cursor_end()
case Action.move_cursor_word_left: r.move_cursor_word_left()
case Action.move_cursor_word_right: r.move_cursor_word_right()
case Action.history_previous: r.history_previous()
case Action.history_next: r.history_next()
case Action.overwrite: r.switch_overwrite()
case Action.clear_screen: r.clear_screen()
case Action.suspend: r.suspend()
match a {
Action.eof { return r.eof() }
Action.insert_character { r.insert_character(c) }
Action.commit_line { return r.commit_line() }
Action.delete_left { r.delete_character() }
Action.delete_right { r.suppr_character() }
Action.move_cursor_left { r.move_cursor_left() }
Action.move_cursor_right { r.move_cursor_right() }
Action.move_cursor_begining { r.move_cursor_begining() }
Action.move_cursor_end { r.move_cursor_end() }
Action.move_cursor_word_left { r.move_cursor_word_left() }
Action.move_cursor_word_right { r.move_cursor_word_right() }
Action.history_previous { r.history_previous() }
Action.history_next { r.history_next() }
Action.overwrite { r.switch_overwrite() }
Action.clear_screen { r.clear_screen() }
Action.suspend { r.suspend() }
}
return false
}