Escape single quotes while translating dropped Win32 paths

a4lg · a4lg · commit d2ed3d5ca106 · 2024-11-23T04:45:33.000Z
When file/folder is dropped to the terminal, its path is translated and quoted with a pair of single quotes if necessary. However, the terminal control does not escape single quotes (allowed in the Win32 subsystem) that need escapes when translated. On the translation styles other than "none" (note: all other translation styles are currently intended for the POSIX shell), it causes incorrect path to be pasted when the path contains one or more single quotes (see Issue #18006 for an example). With this commit, the terminal control escapes a single quote with a valid escape sequence `'\''` (finish quote, print a single quote then begin quote again) when the path translation is required.
diff --git a/src/cascadia/TerminalControl/TermControl.cpp b/src/cascadia/TerminalControl/TermControl.cpp
@@ -66,6 +66,8 @@ namespace winrt::Microsoft::Terminal::Control::implementation
             /* Cygwin */ L"/cygdrive/",
             /* MSYS2 */ L"/",
         };
+        static constexpr wil::zwstring_view sSingleQuoteEscape = L"'\\''";
+        static constexpr auto cchSingleQuoteEscape = sSingleQuoteEscape.size();
 
         if (translationStyle == PathTranslationStyle::None)
         {
@@ -75,6 +77,16 @@ namespace winrt::Microsoft::Terminal::Control::implementation
         // All of the other path translation modes current result in /-delimited paths
         std::replace(fullPath.begin(), fullPath.end(), L'\\', L'/');
 
+        // Escape single quotes, assuming translated paths are always quoted by a pair of single quotes.
+        size_t pos = 0;
+        while ((pos = fullPath.find(L'\'', pos)) != std::wstring::npos)
+        {
+            // ' -> '\'' (for POSIX shell)
+            fullPath.replace(pos, 1, sSingleQuoteEscape);
+            // Arithmetic overflow cannot occur here.
+            pos += cchSingleQuoteEscape;
+        }
+
         if (fullPath.size() >= 2 && fullPath.at(1) == L':')
         {
             // C:/foo/bar -> Cc/foo/bar
