1 files changed, 58 insertions, 0 deletions
diff --git a/security/sandbox/chromium-shim/sandbox/win/src/line_break_dispatcher.cc b/security/sandbox/chromium-shim/sandbox/win/src/line_break_dispatcher.cc
new file mode 100644
index 0000000000..94401d18fa
--- /dev/null
+++ b/security/sandbox/chromium-shim/sandbox/win/src/line_break_dispatcher.cc
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "sandbox/win/src/line_break_dispatcher.h"
+
+#include "sandbox/win/src/line_break_common.h"
+#include "sandbox/win/src/line_break_policy.h"
+#include "sandbox/win/src/ipc_tags.h"
+#include "sandbox/win/src/policy_params.h"
+
+namespace sandbox {
+
+LineBreakDispatcher::LineBreakDispatcher(PolicyBase* policy_base)
+    : policy_base_(policy_base) {
+  static const IPCCall get_complex_line_breaks = {
+      {IpcTag::GETCOMPLEXLINEBREAKS, {INPTR_TYPE, UINT32_TYPE, INOUTPTR_TYPE}},
+      reinterpret_cast<CallbackGeneric>(
+          &LineBreakDispatcher::GetComplexLineBreaksCall)};
+
+  ipc_calls_.push_back(get_complex_line_breaks);
+}
+
+bool LineBreakDispatcher::SetupService(InterceptionManager* manager,
+                                       IpcTag service) {
+  // We perform no interceptions for line breaking right now.
+  switch (service) {
+    case IpcTag::GETCOMPLEXLINEBREAKS:
+      return true;
+
+    default:
+      return false;
+  }
+}
+
+bool LineBreakDispatcher::GetComplexLineBreaksCall(
+    IPCInfo* ipc, CountedBuffer* text_buf, uint32_t length,
+    CountedBuffer* break_before_buf) {
+  if (length > kMaxBrokeredLen ||
+      text_buf->Size() != length * sizeof(wchar_t) ||
+      break_before_buf->Size() != length) {
+    return false;
+  }
+
+  CountedParameterSet<EmptyParams> params;
+  EvalResult eval =
+      policy_base_->EvalPolicy(IpcTag::GETCOMPLEXLINEBREAKS, params.GetBase());
+  auto* text = static_cast<wchar_t*>(text_buf->Buffer());
+  auto* break_before = static_cast<uint8_t*>(break_before_buf->Buffer());
+  ipc->return_info.win32_result =
+      LineBreakPolicy::GetComplexLineBreaksProxyAction(eval, text, length,
+                                                       break_before);
+  return true;
+}
+
+}  // namespace sandbox