Add a maximum OSC 8 URI length of 2MB following iTerm2 (#14198)

gnachman/iTerm2@c0b2f48

Unlike iTerm2, we're not planning on making it configurable.

This commit also adds a max length of 1024 characters on the "display URI" that we pass up to XAML, so as to not inundate the UI.

Fixes #14200

src/cascadia/TerminalControl/ControlCore.cpp

@@ -692,7 +692,9 @@ namespace winrt::Microsoft::Terminal::Control::implementation
         auto lock = _terminal->LockForReading(); // Lock for the duration of our reads.
         if (_lastHoveredCell.has_value())
         {
-            return winrt::hstring{ _terminal->GetHyperlinkAtViewportPosition(*_lastHoveredCell) };
+            auto uri{ _terminal->GetHyperlinkAtViewportPosition(*_lastHoveredCell) };
+            uri.resize(std::min<size_t>(1024u, uri.size())); // Truncate for display
+            return winrt::hstring{ uri };
         }
         return {};
     }

src/terminal/parser/OutputStateMachineEngine.cpp

@@ -989,7 +989,7 @@ bool OutputStateMachineEngine::_ParseHyperlink(const std::wstring_view string,
     const auto midPos = string.find(';');
     if (midPos != std::wstring::npos)
     {
-        uri = string.substr(midPos + 1);
+        uri = string.substr(midPos + 1, MAX_URL_LENGTH);
         const auto paramStr = string.substr(0, midPos);
         const auto paramParts = Utils::SplitString(paramStr, ':');
         for (const auto& part : paramParts)

src/terminal/parser/OutputStateMachineEngine.hpp

@@ -26,6 +26,8 @@ namespace Microsoft::Console::VirtualTerminal
     class OutputStateMachineEngine : public IStateMachineEngine
     {
     public:
+        static constexpr size_t MAX_URL_LENGTH = 2 * 1048576; // 2MB, like iTerm2
+
         OutputStateMachineEngine(std::unique_ptr<ITermDispatch> pDispatch);
 
         bool ActionExecute(const wchar_t wch) override;