ui/base/win/accessibility_misc_utils.h

   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 #ifndef UI_BASE_WIN_ACCESSIBILITY_MISC_UTILS_H_
   5 #define UI_BASE_WIN_ACCESSIBILITY_MISC_UTILS_H_
   6
   7 #include <atlbase.h>
   8 #include <atlcom.h>
   9 #include <UIAutomationCore.h>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/strings/string16.h"
  13 #include "ui/base/ui_base_export.h"
  14
  15 namespace base {
  16 namespace win {
  17
  18   // UIA Text provider implementation for edit controls.
  19 class UI_BASE_EXPORT UIATextProvider
  20     : public NON_EXPORTED_BASE(CComObjectRootEx<CComMultiThreadModel>),
  21       public IValueProvider,
  22       public ITextProvider {
  23  public:
  24   BEGIN_COM_MAP(UIATextProvider)
  25     COM_INTERFACE_ENTRY2(IUnknown, ITextProvider)
  26     COM_INTERFACE_ENTRY(IValueProvider)
  27     COM_INTERFACE_ENTRY(ITextProvider)
  28   END_COM_MAP()
  29
  30   UIATextProvider();
  31   ~UIATextProvider();
  32
  33   // Creates an instance of the UIATextProvider class.
  34   // Returns true on success
  35   static bool CreateTextProvider(const string16& value,
  36                                  bool editable,
  37                                  IUnknown** provider);
  38
  39   void set_editable(bool editable) {
  40     editable_ = editable;
  41   }
  42
  43   void set_value(const string16& value) { value_ = value; }
  44
  45   //
  46   // IValueProvider methods.
  47   //
  48   STDMETHOD(get_IsReadOnly)(BOOL* read_only) override;
  49
  50   //
  51   // IValueProvider methods.
  52   //
  53   STDMETHOD(SetValue)(const wchar_t* val) override;
  54
  55   STDMETHOD(get_Value)(BSTR* value) override;
  56
  57   //
  58   // ITextProvider methods.
  59   //
  60   STDMETHOD(GetSelection)(SAFEARRAY** ret) override;
  61
  62   STDMETHOD(GetVisibleRanges)(SAFEARRAY** ret) override;
  63
  64   STDMETHOD(RangeFromChild)(IRawElementProviderSimple* child,
  65                             ITextRangeProvider** ret) override;
  66
  67   STDMETHOD(RangeFromPoint)(struct UiaPoint point,
  68                             ITextRangeProvider** ret) override;
  69
  70   STDMETHOD(get_DocumentRange)(ITextRangeProvider** ret) override;
  71
  72   STDMETHOD(get_SupportedTextSelection)(
  73       enum SupportedTextSelection* ret) override;
  74
  75  private:
  76   bool editable_;
  77   string16 value_;
  78 };
  79
  80 }  // win
  81 }  // base
  82
  83 #endif  // UI_BASE_WIN_ACCESSIBILITY_MISC_UTILS_H_