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terminal: highlight JS globals in prompt

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Adds syntax highlighting for common JS globals (like window, console,
and lp) in cyan, excluding property accesses.
This commit is contained in:
Adrià Arrufat
2026-06-11 19:54:29 +02:00
parent 19581f34ce
commit 538b560676
1 changed files with 18 additions and 1 deletions
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19
src/agent/Terminal.zig
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@@ -40,6 +40,7 @@ const style_err = "ps-err";
const style_jsmode = "ps-jsmode";
const style_keyword = "ps-keyword";
const style_comment = "ps-comment";
const style_jsglobal = "ps-jsglobal";
pub const ansi = struct {
pub const reset = "\x1b[0m";
@@ -160,6 +161,7 @@ pub fn init(allocator: std.mem.Allocator, history_paths: ?HistoryPaths, verbosit
c.ic_style_def(style_jsmode, "ansi-red bold");
c.ic_style_def(style_keyword, "ansi-blue bold");
c.ic_style_def(style_comment, "ansi-darkgray italic");
c.ic_style_def(style_jsglobal, "ansi-cyan");
// lighten the ghost/inline-hint color from isocline's default ansi-darkgray
c.ic_style_def("ic-hint", "ansi-color=244");
// `!` on an empty prompt toggles JS mode; state callback wired in attachCompleter.
@@ -844,6 +846,10 @@ const js_keywords = [_][]const u8{
"throw", "true", "false", "null", "undefined", "NaN", "Infinity",
};
// Globals available in the JS-mode page context; highlighted so it's visible
// at the prompt that they're in scope.
const js_globals = [_][]const u8{ "document", "window", "globalThis", "console", "lp" };
fn isJsKeyword(tok: []const u8) bool {
for (js_keywords) |kw| {
if (std.mem.eql(u8, kw, tok)) return true;
@@ -851,6 +857,13 @@ fn isJsKeyword(tok: []const u8) bool {
return false;
}
fn isJsGlobal(tok: []const u8) bool {
for (js_globals) |g| {
if (std.mem.eql(u8, g, tok)) return true;
}
return false;
}
fn isIdChar(ch: u8) bool {
return std.ascii.isAlphanumeric(ch) or ch == '_' or ch == '$' or ch >= 0x80;
}
@@ -902,8 +915,12 @@ fn highlightJavaScript(henv: ?*c.ic_highlight_env_t, text: []const u8) void {
const start = i;
i += 1;
while (i < text.len and isIdChar(text[i])) i += 1;
if (isJsKeyword(text[start..i])) {
const tok = text[start..i];
if (isJsKeyword(tok)) {
c.ic_highlight(henv, @intCast(start), @intCast(i - start), style_keyword.ptr);
} else if (isJsGlobal(tok) and (start == 0 or text[start - 1] != '.')) {
// `.document` is a property access, not the global
c.ic_highlight(henv, @intCast(start), @intCast(i - start), style_jsglobal.ptr);
}
continue;
}