ui/base/win/accessibility_misc_utils.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4 #include "ui/base/win/accessibility_misc_utils.h"
   5
   6 #include "base/logging.h"
   7 #include "ui/base/win/atl_module.h"
   8
   9 namespace base {
  10 namespace win {
  11
  12 // UIA TextProvider implementation.
  13 UIATextProvider::UIATextProvider()
  14     : editable_(false) {}
  15
  16 // static
  17 bool UIATextProvider::CreateTextProvider(const string16& value,
  18                                          bool editable,
  19                                          IUnknown** provider) {
  20   // Make sure ATL is initialized in this module.
  21   ui::win::CreateATLModuleIfNeeded();
  22
  23   CComObject<UIATextProvider>* text_provider = NULL;
  24   HRESULT hr = CComObject<UIATextProvider>::CreateInstance(&text_provider);
  25   if (SUCCEEDED(hr)) {
  26     DCHECK(text_provider);
  27     text_provider->set_editable(editable);
  28     text_provider->set_value(value);
  29     text_provider->AddRef();
  30     *provider = static_cast<ITextProvider*>(text_provider);
  31     return true;
  32   }
  33   return false;
  34 }
  35
  36 STDMETHODIMP UIATextProvider::get_IsReadOnly(BOOL* read_only) {
  37   *read_only = !editable_;
  38   return S_OK;
  39 }
  40
  41 STDMETHODIMP UIATextProvider::get_Value(BSTR* value) {
  42   *value = SysAllocString(value_.c_str());
  43   return S_OK;
  44 }
  45
  46 }  // namespace win
  47 }  // namespace base