From a1d66a700d4bf9bf31f33d9c9eb36cdc81111289 Mon Sep 17 00:00:00 2001
From: Orion <orionc1226@gmail.com>
Date: Tue, 28 Jul 2026 09:01:40 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20fix(core):=20=E4=BC=98=E5=8C=96?=
 =?UTF-8?q?=E7=BB=88=E7=AB=AF=E5=90=8C=E6=AD=A5=E5=88=B7=E6=96=B0=E4=B8=8E?=
 =?UTF-8?q?=E7=BC=93=E5=86=B2=E5=8C=BA=E5=A4=84=E7=90=86=E9=80=BB=E8=BE=91?=
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* 引入终端同步更新转义序列以减少屏幕闪烁
* 重构缓冲区机制，区分普通数据与传输数据缓存
* 新增前缀匹配算法函数用于处理跨分段的标记位识别
* 完善同步状态机逻辑，实现对同步更新区域的精确追踪
* 优化输入流读取与分发流程，提升终端输出稳定性
---
 homebrew/brew-upgrade-manager.sh | 107 +++++++++++++++++++++++++------
 1 file changed, 88 insertions(+), 19 deletions(-)

diff --git a/homebrew/brew-upgrade-manager.sh b/homebrew/brew-upgrade-manager.sh
index 2db211f..170119c 100644
--- a/homebrew/brew-upgrade-manager.sh
+++ b/homebrew/brew-upgrade-manager.sh
@@ -674,13 +674,36 @@ sub colorize_line {
     }
 }
 
-my $buffer = "";
-while (sysread(STDIN, my $chunk, 8192)) {
-    $buffer .= $chunk;
+my $sync_begin = "\e[?2026h";
+my $sync_end = "\e[?2026l";
+my $transport_buffer = "";
+my $normal_buffer = "";
+my $inside_sync_update = 0;
 
-    while (length $buffer) {
-        my $newline = index($buffer, "\n");
-        my $carriage = index($buffer, "\r");
+sub suffix_prefix_length {
+    my ($text, $marker) = @_;
+    my $maximum = length($marker) - 1;
+    $maximum = length($text) if length($text) < $maximum;
+
+    for (my $length = $maximum; $length > 0; $length--) {
+        return $length if substr($text, -$length) eq substr($marker, 0, $length);
+    }
+    return 0;
+}
+
+sub emit_leading_control_sequences {
+    while ($normal_buffer =~ s/\A(\e\[[0-?]*[ -\/]*[@-~])//) {
+        print $1;
+    }
+}
+
+sub drain_normal_output {
+    my ($final) = @_;
+    emit_leading_control_sequences();
+
+    while (length $normal_buffer) {
+        my $newline = index($normal_buffer, "\n");
+        my $carriage = index($normal_buffer, "\r");
         my $position;
         if ($newline < 0) {
             $position = $carriage;
@@ -689,33 +712,79 @@ while (sysread(STDIN, my $chunk, 8192)) {
         } else {
             $position = $newline < $carriage ? $newline : $carriage;
         }
-        last if $position < 0;
 
-        my $separator = substr($buffer, $position, 1);
+        if ($position < 0) {
+            if ($final) {
+                colorize_line($normal_buffer);
+                $normal_buffer = "";
+            }
+            return;
+        }
+
+        my $separator = substr($normal_buffer, $position, 1);
         # 分块时 CR 可能正好在 CRLF 的边界，等待下一块再决定它是换行还是进度重绘。
-        last if $separator eq "\r" && $position + 1 == length($buffer);
+        return if !$final && $separator eq "\r" && $position + 1 == length($normal_buffer);
 
-        my $record = substr($buffer, 0, $position);
-        if ($separator eq "\r" && substr($buffer, $position + 1, 1) eq "\n") {
-            substr($buffer, 0, $position + 2, "");
+        my $record = substr($normal_buffer, 0, $position);
+        if ($separator eq "\r" && substr($normal_buffer, $position + 1, 1) eq "\n") {
+            substr($normal_buffer, 0, $position + 2, "");
             colorize_line($record);
         } elsif ($separator eq "\n") {
-            substr($buffer, 0, $position + 1, "");
+            substr($normal_buffer, 0, $position + 1, "");
             colorize_line($record);
         } else {
-            substr($buffer, 0, $position + 1, "");
+            substr($normal_buffer, 0, $position + 1, "");
             print $record, "\r";
         }
+        emit_leading_control_sequences();
     }
 }
 
-if (length $buffer) {
-    if ($buffer =~ s/\r\z//) {
-        print $buffer, "\r";
-    } else {
-        colorize_line($buffer);
+sub drain_transport_output {
+    my ($final) = @_;
+
+    while (length $transport_buffer) {
+        if ($inside_sync_update) {
+            my $end_position = index($transport_buffer, $sync_end);
+            if ($end_position >= 0) {
+                my $length = $end_position + length($sync_end);
+                print substr($transport_buffer, 0, $length, "");
+                $inside_sync_update = 0;
+                next;
+            }
+
+            my $keep = $final ? 0 : suffix_prefix_length($transport_buffer, $sync_end);
+            my $available = length($transport_buffer) - $keep;
+            print substr($transport_buffer, 0, $available, "") if $available > 0;
+            return;
+        }
+
+        my $begin_position = index($transport_buffer, $sync_begin);
+        if ($begin_position >= 0) {
+            $normal_buffer .= substr($transport_buffer, 0, $begin_position, "");
+            drain_normal_output(0);
+            print substr($transport_buffer, 0, length($sync_begin), "");
+            $inside_sync_update = 1;
+            next;
+        }
+
+        my $keep = $final ? 0 : suffix_prefix_length($transport_buffer, $sync_begin);
+        my $available = length($transport_buffer) - $keep;
+        if ($available > 0) {
+            $normal_buffer .= substr($transport_buffer, 0, $available, "");
+            drain_normal_output(0);
+        }
+        return;
     }
 }
+
+while (sysread(STDIN, my $chunk, 8192)) {
+    $transport_buffer .= $chunk;
+    drain_transport_output(0);
+}
+
+drain_transport_output(1);
+drain_normal_output(1);
 '
 }