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terminal: clarify DECECM report handling

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This commit is contained in:
Ayush
2026-05-11 16:18:04 -07:00
parent c092b2bcf5
commit f1ca88da37
1 changed files with 3 additions and 3 deletions
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6
src/terminal/modes.zig
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@@ -10,8 +10,6 @@
const std = @import("std");
const testing = std.testing;
const dececm_mode: u15 = 117;
/// A struct that maintains the state of all the settable modes.
pub const ModeState = struct {
/// The values of the current modes.
@@ -81,7 +79,9 @@ pub const ModeState = struct {
/// Return a DECRPM report for the given mode tag. If the tag does
/// not correspond to a known mode, the report state is .not_recognized.
pub fn getReport(self: *const ModeState, tag: ModeTag) Report {
if (!tag.ansi and tag.value == dececm_mode) {
// DECECM (Erase Color Mode) is DEC private mode 117. Ghostty behaves as
// if it is permanently reset and does not implement it as a mutable mode.
if (!tag.ansi and tag.value == 117) {
return .{ .tag = tag, .state = .permanently_reset };
}
const mode = modeFromInt(tag.value, tag.ansi) orelse return .{