WIP: Ash IME support

win8/metro_driver/ime/input_scope.cc

Index: win8/metro_driver/ime/input_scope.cc
diff --git a/win8/metro_driver/ime/input_scope.cc b/win8/metro_driver/ime/input_scope.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bbe9cd3d06035a438f4e9736cccc58f851eae6dc
--- /dev/null
+++ b/win8/metro_driver/ime/input_scope.cc
@@ -0,0 +1,82 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "win8/metro_driver/ime/input_scope.h"
+
+namespace metro_driver {
+namespace {
+
+class InputScopeImpl : public ITfInputScope {
+ public:
+  explicit InputScopeImpl(const std::vector<InputScope>& input_scopes)
+      : ref_count_(0),
+        input_scopes_(input_scopes) {}
+
+  // ITfInputScope overrides:
+  STDMETHOD_(ULONG, AddRef)() OVERRIDE {
+    return InterlockedIncrement(&ref_count_);
+  }
+  STDMETHOD_(ULONG, Release)() OVERRIDE {
+    const LONG count = InterlockedDecrement(&ref_count_);
+    if (!count) {
+      delete this;
+      return 0;
+    }
+    return static_cast<ULONG>(count);
+  }
+  STDMETHOD(QueryInterface)(REFIID iid, void** result) OVERRIDE {
+    if (!result)
+      return E_INVALIDARG;
+    if (iid == IID_IUnknown || iid == IID_ITfInputScope) {
+      *result = static_cast<ITfInputScope*>(this);
+    } else {
+      *result = NULL;
+      return E_NOINTERFACE;
+    }
+    AddRef();
+    return S_OK;
+  }
+  STDMETHOD(GetInputScopes)(InputScope** input_scopes, UINT* count) OVERRIDE {
+    if (!count || !input_scopes)
+      return E_INVALIDARG;
+    *input_scopes = static_cast<InputScope*>(
+        CoTaskMemAlloc(sizeof(InputScope) * input_scopes_.size()));
+    if (!input_scopes) {
+      *count = 0;
+      return E_OUTOFMEMORY;
+    }
+    std::copy(input_scopes_.begin(), input_scopes_.end(), *input_scopes);
+    *count = input_scopes_.size();
+    return S_OK;
+  }
+  STDMETHOD(GetPhrase)(BSTR** phrases, UINT* count) OVERRIDE {
+    return E_NOTIMPL;
+  }
+  STDMETHOD(GetRegularExpression)(BSTR* regexp) OVERRIDE {
+    return E_NOTIMPL;
+  }
+  STDMETHOD(GetSRGS)(BSTR* srgs) OVERRIDE {
+    return E_NOTIMPL;
+  }
+  STDMETHOD(GetXML)(BSTR* xml) OVERRIDE {
+    return E_NOTIMPL;
+  }
+
+ private:
+  // The refrence count of this instance.
+  volatile LONG ref_count_;
+  // The corresponding text input types.
+  const std::vector<InputScope> input_scopes_;
+
+  DISALLOW_COPY_AND_ASSIGN(InputScopeImpl);
+};
+
+}  // namespace
+
+base::win::ScopedComPtr<IUnknown>
+CreteInputScope(const std::vector<InputScope>& input_scopes) {
+  return base::win::ScopedComPtr<IUnknown>(new InputScopeImpl(input_scopes));
+}
+
+}  // namespace metro_driver