Remove clipboard operations from QAccessibleEditableTextInterface

Also, remove its subclass QAccessibleSimpleEditableTextInterface

Instead of having the subclass that implements this conveniently,
we move this behaviour over to the bridge. The bridge should
check if role() == EditableText is set, and then it should try to
support the IAccessibleEditableText interface (i.e.
it should accept the calls to replaceText(), deleteText() and
insertText()) and change the text with the following operations:
1. Query the text using QAccessibleTextInterface::text() or by
   using QAccessibleInterface::text(QAccessible::Value) as a fallback
2. Do the requested delete/insert/replace manipulation
3. Update the text with setText(QAccessible::Value, newText);

Change-Id: Iee5e41faf14351951e2bfca8c9eac970a113e878
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@nokia.com>

1 files changed, 126 insertions, 3 deletions

diff --git a/src/plugins/platforms/windows/accessible/iaccessible2.cpp b/src/plugins/platforms/windows/accessible/iaccessible2.cpp
index 71a26aff6b..5a82936a03 100644
--- a/src/plugins/platforms/windows/accessible/iaccessible2.cpp
+++ b/src/plugins/platforms/windows/accessible/iaccessible2.cpp
@@ -45,6 +45,7 @@
 #include "qwindowsaccessibility.h"
 
 #include <QtGui/qaccessible2.h>
+#include <QtGui/qclipboard.h>
 #include <QtWidgets/qapplication.h>
 #include <QtCore/qdebug.h>
 
@@ -241,9 +242,11 @@ HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::QueryInterface(REFIID id, LPVOI
         } else if (id == IID_IAccessibleComponent) {
             *iface = (IAccessibleComponent*)this;
         } else if (id == IID_IAccessibleEditableText) {
-            //if (accessible->editableTextInterface()) {
-                //*iface = (IAccessibleEditableText*)this;
-            //}
+            if (accessible->editableTextInterface() ||
+                accessible->role() == QAccessible::EditableText)
+            {
+                *iface = (IAccessibleEditableText*)this;
+            }
         } else if (id == IID_IAccessibleHyperlink) {
             //*iface = (IAccessibleHyperlink*)this;
         } else if (id == IID_IAccessibleHypertext) {
@@ -673,6 +676,126 @@ HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::get_background(IA2Color *backgr
 }
 
 /**************************************************************\
+ *                     IAccessibleEditableText                *
+ **************************************************************/
+#ifndef QT_NO_CLIPBOARD
+/*!
+    \internal
+
+    if \a endOffset == -1 it means end of the text
+*/
+QString QWindowsIA2Accessible::textForRange(int startOffset, int endOffset) const
+{
+    if (QAccessibleTextInterface *textIface = accessible->textInterface()) {
+        if (endOffset == IA2_TEXT_OFFSET_LENGTH)
+            endOffset = textIface->characterCount();
+        return textIface->text(startOffset, endOffset);
+    }
+    QString txt = accessible->text(QAccessible::Value);
+    if (endOffset == IA2_TEXT_OFFSET_LENGTH)
+        endOffset = txt.length();
+    return txt.mid(startOffset, endOffset - startOffset);
+}
+#endif
+
+/*!
+    \internal
+*/
+void QWindowsIA2Accessible::replaceTextFallback(long startOffset, long endOffset, const QString &txt)
+{
+    QString t = textForRange(0, -1);
+    if (endOffset == IA2_TEXT_OFFSET_LENGTH)
+        endOffset = t.length();
+    if (endOffset - startOffset == 0) {
+        t.insert(startOffset, txt);
+    } else {
+        t.replace(startOffset, endOffset - startOffset, txt);
+    }
+    accessible->setText(QAccessible::Value, t);
+}
+
+HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::copyText(long startOffset, long endOffset)
+{
+    accessibleDebugClientCalls(accessible);
+#ifndef QT_NO_CLIPBOARD
+    const QString t = textForRange(startOffset, endOffset);
+    QGuiApplication::clipboard()->setText(t);
+    return S_OK;
+#else
+    return E_NOTIMPL;
+#endif
+}
+
+HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::deleteText(long startOffset, long endOffset)
+{
+    accessibleDebugClientCalls(accessible);
+    if (QAccessibleEditableTextInterface *editableTextIface = accessible->editableTextInterface())
+        editableTextIface->deleteText(startOffset, endOffset);
+    else
+        replaceTextFallback(startOffset, endOffset, QString());
+    return S_OK;
+}
+
+HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::insertText(long offset, BSTR *text)
+{
+    accessibleDebugClientCalls(accessible);
+    const QString txt(BSTRToQString(*text));
+    if (QAccessibleEditableTextInterface *editableTextIface = accessible->editableTextInterface())
+        editableTextIface->insertText(offset, txt);
+    else
+        replaceTextFallback(offset, offset, txt);
+    return S_OK;
+}
+
+HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::cutText(long startOffset, long endOffset)
+{
+    accessibleDebugClientCalls(accessible);
+#ifndef QT_NO_CLIPBOARD
+    const QString t = textForRange(startOffset, endOffset);
+    if (QAccessibleEditableTextInterface *editableTextIface = accessible->editableTextInterface())
+        editableTextIface->deleteText(startOffset, endOffset);
+    else
+        replaceTextFallback(startOffset, endOffset, QString());
+    QGuiApplication::clipboard()->setText(t);
+    return S_OK;
+#else
+    return E_NOTIMPL;
+#endif
+}
+
+HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::pasteText(long offset)
+{
+    accessibleDebugClientCalls(accessible);
+#ifndef QT_NO_CLIPBOARD
+    const QString txt = QGuiApplication::clipboard()->text();
+    if (QAccessibleEditableTextInterface *editableTextIface = accessible->editableTextInterface())
+        editableTextIface->insertText(offset, txt);
+    else
+        replaceTextFallback(offset, offset, txt);
+    return S_OK;
+#else
+    return E_NOTIMPL;
+#endif
+}
+
+HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::replaceText(long startOffset, long endOffset, BSTR *text)
+{
+    accessibleDebugClientCalls(accessible);
+    const QString txt(BSTRToQString(*text));
+    if (QAccessibleEditableTextInterface *editableTextIface = accessible->editableTextInterface())
+        editableTextIface->replaceText(startOffset, endOffset, txt);
+    else
+        replaceTextFallback(startOffset, endOffset, txt);
+    return S_OK;
+}
+
+HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::setAttributes(long /*startOffset*/, long /*endOffset*/, BSTR * /*attributes*/)
+{
+    return E_NOTIMPL;
+}
+
+
+/**************************************************************\
  *                     IAccessibleTable2                      *
  **************************************************************/
 HRESULT STDMETHODCALLTYPE QWindowsIA2Accessible::get_cellAt( long row, long column, IUnknown **cell)