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Userland/js: Prompt for more input on labels and object keys

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Closes #2452
This commit is contained in:
AnotherTest 2020-05-30 21:42:11 +04:30 committed by Andreas Kling
parent ca6fbefbc9
commit 4aa3d08e21
Notes: sideshowbarker 2024-07-19 05:56:09 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/4aa3d08e214
Pull-request: https://github.com/SerenityOS/serenity/pull/2458
Issue: https://github.com/SerenityOS/serenity/issues/2452
1 changed files with 33 additions and 1 deletions
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34
Userland/js.cpp
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@ -86,9 +86,13 @@ String read_next_piece()
{
StringBuilder piece;
auto line_level_delta_for_next_line { 0 };
do {
auto line_result = s_editor->get_line(prompt_for_level(s_repl_line_level));
line_level_delta_for_next_line = 0;
if (line_result.is_error()) {
s_fail_repl = true;
return "";
@ -100,23 +104,51 @@ String read_next_piece()
piece.append(line);
auto lexer = JS::Lexer(line);
enum {
NotInLabelOrObjectKey,
InLabelOrObjectKeyIdentifier,
InLabelOrObjectKey
} label_state { NotInLabelOrObjectKey };
for (JS::Token token = lexer.next(); token.type() != JS::TokenType::Eof; token = lexer.next()) {
switch (token.type()) {
case JS::TokenType::BracketOpen:
case JS::TokenType::CurlyOpen:
case JS::TokenType::ParenOpen:
label_state = NotInLabelOrObjectKey;
s_repl_line_level++;
break;
case JS::TokenType::BracketClose:
case JS::TokenType::CurlyClose:
case JS::TokenType::ParenClose:
label_state = NotInLabelOrObjectKey;
s_repl_line_level--;
break;
case JS::TokenType::Identifier:
case JS::TokenType::StringLiteral:
if (label_state == NotInLabelOrObjectKey)
label_state = InLabelOrObjectKeyIdentifier;
else
label_state = NotInLabelOrObjectKey;
break;
case JS::TokenType::Colon:
if (label_state == InLabelOrObjectKeyIdentifier)
label_state = InLabelOrObjectKey;
else
label_state = NotInLabelOrObjectKey;
break;
default:
break;
}
}
} while (s_repl_line_level > 0);
if (label_state == InLabelOrObjectKey) {
// If there's a label or object literal key at the end of this line,
// prompt for more lines but do not change the line level.
line_level_delta_for_next_line += 1;
}
} while (s_repl_line_level + line_level_delta_for_next_line > 0);
return piece.to_string();
}