[idd] transport: isolate interactive services

2026-08-22 15:11:31 +00:00 · 2026-08-12 21:49:04 +10:00
parent 51f432db00
commit c92acb0a34
21 changed files with 2026 additions and 401 deletions
--- a/idd/LGIdd/transport/CInputHub.h
+++ b/idd/LGIdd/transport/CInputHub.h
@@ -0,0 +1,108 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2026 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#pragma once
+
+#include "CSRWLock.h"
+#include "transport/IInputSource.h"
+#include "transport/IInputTransport.h"
+#include "transport/ITransport.h"
+
+#include <Windows.h>
+
+class IInputSink;
+
+class CInputHub final : public IInputTransport
+{
+private:
+  static constexpr unsigned MAX_SOURCES = 8;
+  static constexpr uint64_t OWNER_LEASE_MS = 500;
+
+  struct Source final : public IInputTarget
+  {
+    CInputHub   * owner   = nullptr;
+    BackendId     backend = 0;
+    uint32_t      epoch   = 0;
+    IInputSource * endpoint = nullptr;
+    bool           running = false;
+    bool           active = false;
+    bool           reserved = false;
+    bool           failed = false;
+    bool           failurePending = false;
+
+    SourceKey Key(const InputSourceId& source) const;
+    InputTargetState GetState(const InputSourceId& source) override;
+    void Failed() override;
+    InputResult Claim(const InputSourceId& source) override;
+    InputResult Touch(const InputSourceId& source) override;
+    InputResult Release(
+      const InputSourceId& source, bool reset) override;
+    InputResult SendMouseRelative(const InputSourceId& source,
+      int32_t deltaX, int32_t deltaY, int32_t wheel,
+      uint32_t buttons) override;
+    InputResult SendMouseAbsolute(const InputSourceId& source,
+      uint16_t x, uint16_t y, int32_t wheel,
+      uint32_t buttons) override;
+    InputResult SendKeyboard(const InputSourceId& source,
+      uint8_t modifiers, const uint8_t * keys) override;
+    InputResult Reset(const InputSourceId& source) override;
+  };
+
+  mutable CSRWLock m_lock;
+  CSRWLock         m_lifecycleLock;
+  Source           m_sources[MAX_SOURCES];
+  IInputSink     * m_sink = nullptr;
+  uint64_t         m_sinkState = 0;
+  SourceKey        m_owner;
+  uint64_t         m_ownerDeadline = 0;
+  bool             m_started = false;
+
+  bool SourceValid(const SourceKey& source) const;
+  bool BindingPresent(const SourceKey& source) const;
+  bool BindingValid(const SourceKey& source) const;
+  bool OwnerValid(const SourceKey& source) const;
+  bool CheckState();
+  InputTargetState GetState(const SourceKey& source);
+  void Failed(Source& source);
+  InputResult Claim(const SourceKey& source);
+  InputResult Touch(const SourceKey& source);
+  InputResult Release(const SourceKey& source, bool reset);
+  InputResult SendMouseRelative(const SourceKey& source,
+    int32_t deltaX, int32_t deltaY, int32_t wheel, uint32_t buttons);
+  InputResult SendMouseAbsolute(const SourceKey& source,
+    uint16_t x, uint16_t y, int32_t wheel, uint32_t buttons);
+  InputResult SendKeyboard(const SourceKey& source,
+    uint8_t modifiers, const uint8_t * keys);
+  InputResult Reset(const SourceKey& source);
+
+public:
+  CInputHub();
+  ~CInputHub() override;
+
+  CInputHub(const CInputHub&) = delete;
+  CInputHub& operator=(const CInputHub&) = delete;
+
+  bool Bind(BackendId backend, uint32_t epoch, IInputSource& source);
+  void Unbind(BackendId backend, uint32_t epoch);
+  bool TakeFailure(SourceKey& source);
+
+  bool Start(IInputSink& sink) override;
+  void Stop() override;
+};