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fix: iTerm2 cursor blinking issue (#287)

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Closes https://github.com/sst/opencode/issues/3780
This commit is contained in:
Ivan Starkov
2025-11-10 16:08:04 +07:00
committed by GitHub
parent 15ff495e73
commit a734fb05bf
1 changed files with 24 additions and 2 deletions
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packages/core/src/zig/renderer.zig
+24 -2
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@@ -103,6 +103,10 @@ pub const CliRenderer = struct {
hitGridWidth: u32,
hitGridHeight: u32,
lastCursorStyleTag: ?u8 = null,
lastCursorBlinking: ?bool = null,
lastCursorColorRGB: ?[3]u8 = null,
// Preallocated output buffer
var outputBuffer: [OUTPUT_BUFFER_SIZE]u8 = undefined;
var outputBufferLen: usize = 0;
@@ -183,6 +187,9 @@ pub const CliRenderer = struct {
.renderOffset = 0,
.terminal = Terminal.init(.{}),
.testing = testing,
.lastCursorStyleTag = null,
.lastCursorBlinking = null,
.lastCursorColorRGB = null,
.renderStats = .{
.lastFrameTime = 0,
@@ -681,12 +688,27 @@ pub const CliRenderer = struct {
const cursorG = rgbaComponentToU8(cursorColor[1]);
const cursorB = rgbaComponentToU8(cursorColor[2]);
ansi.ANSI.cursorColorOutputWriter(writer, cursorR, cursorG, cursorB) catch {};
writer.writeAll(cursorStyleCode) catch {};
const styleTag: u8 = @intFromEnum(cursorStyle.style);
const styleChanged = (self.lastCursorStyleTag == null or self.lastCursorStyleTag.? != styleTag) or
(self.lastCursorBlinking == null or self.lastCursorBlinking.? != cursorStyle.blinking);
const colorChanged = (self.lastCursorColorRGB == null or self.lastCursorColorRGB.?[0] != cursorR or self.lastCursorColorRGB.?[1] != cursorG or self.lastCursorColorRGB.?[2] != cursorB);
if (colorChanged) {
ansi.ANSI.cursorColorOutputWriter(writer, cursorR, cursorG, cursorB) catch {};
self.lastCursorColorRGB = .{ cursorR, cursorG, cursorB };
}
if (styleChanged) {
writer.writeAll(cursorStyleCode) catch {};
self.lastCursorStyleTag = styleTag;
self.lastCursorBlinking = cursorStyle.blinking;
}
ansi.ANSI.moveToOutput(writer, cursorPos.x, cursorPos.y + self.renderOffset) catch {};
writer.writeAll(ansi.ANSI.showCursor) catch {};
} else {
writer.writeAll(ansi.ANSI.hideCursor) catch {};
self.lastCursorStyleTag = null;
self.lastCursorBlinking = null;
self.lastCursorColorRGB = null;
}
const renderEndTime = std.time.microTimestamp();