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