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 UIATextProvider::~UIATextProvider() {
  17 }
  18
  19 // static
  20 bool UIATextProvider::CreateTextProvider(const string16& value,
  21                                          bool editable,
  22                                          IUnknown** provider) {
  23   // Make sure ATL is initialized in this module.
  24   ui::win::CreateATLModuleIfNeeded();
  25
  26   CComObject<UIATextProvider>* text_provider = NULL;
  27   HRESULT hr = CComObject<UIATextProvider>::CreateInstance(&text_provider);
  28   if (SUCCEEDED(hr)) {
  29     DCHECK(text_provider);
  30     text_provider->set_editable(editable);
  31     text_provider->set_value(value);
  32     text_provider->AddRef();
  33     *provider = static_cast<ITextProvider*>(text_provider);
  34     return true;
  35   }
  36   return false;
  37 }
  38
  39 STDMETHODIMP UIATextProvider::get_IsReadOnly(BOOL* read_only) {
  40   *read_only = !editable_;
  41   return S_OK;
  42 }
  43
  44 //
  45 // IValueProvider methods.
  46 //
  47
  48 STDMETHODIMP UIATextProvider::SetValue(const wchar_t* val) {
  49   return E_NOTIMPL;
  50 }
  51
  52 STDMETHODIMP UIATextProvider::get_Value(BSTR* value) {
  53   *value = SysAllocString(value_.c_str());
  54   return S_OK;
  55 }
  56
  57 //
  58 // ITextProvider methods.
  59 //
  60
  61 STDMETHODIMP UIATextProvider::GetSelection(SAFEARRAY** ret) {
  62   return E_NOTIMPL;
  63 }
  64
  65 STDMETHODIMP UIATextProvider::GetVisibleRanges(SAFEARRAY** ret) {
  66   return E_NOTIMPL;
  67 }
  68
  69 STDMETHODIMP UIATextProvider::RangeFromChild(IRawElementProviderSimple* child,
  70                                              ITextRangeProvider** ret) {
  71   return E_NOTIMPL;
  72 }
  73
  74 STDMETHODIMP UIATextProvider::RangeFromPoint(struct UiaPoint point,
  75                                              ITextRangeProvider** ret) {
  76   return E_NOTIMPL;
  77 }
  78
  79 STDMETHODIMP UIATextProvider::get_DocumentRange(ITextRangeProvider** ret) {
  80   return E_NOTIMPL;
  81 }
  82
  83 STDMETHODIMP UIATextProvider::get_SupportedTextSelection(
  84     enum SupportedTextSelection* ret) {
  85   return E_NOTIMPL;
  86 }
  87
  88 }  // namespace win
  89 }  // namespace base