Add m-esr52 at 52.6.0

1 files changed, 210 insertions, 0 deletions

diff --git a/accessible/windows/sdn/sdnTextAccessible.cpp b/accessible/windows/sdn/sdnTextAccessible.cpp
new file mode 100644
index 000000000..b51caf44e
--- /dev/null
+++ b/accessible/windows/sdn/sdnTextAccessible.cpp
@@ -0,0 +1,210 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "sdnTextAccessible.h"
+
+#include "ISimpleDOMText_i.c"
+
+#include "nsCoreUtils.h"
+#include "DocAccessible.h"
+
+#include "nsIFrame.h"
+#include "nsFontMetrics.h"
+#include "nsPresContext.h"
+#include "nsLayoutUtils.h"
+#include "nsRange.h"
+#include "gfxFont.h"
+#include "nsIAccessibleTypes.h"
+#include "mozilla/gfx/2D.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// sdnTextAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+IMPL_IUNKNOWN_QUERY_HEAD(sdnTextAccessible)
+  IMPL_IUNKNOWN_QUERY_IFACE(ISimpleDOMText)
+IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(mAccessible)
+
+STDMETHODIMP
+sdnTextAccessible::get_domText(BSTR __RPC_FAR* aText)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aText)
+    return E_INVALIDARG;
+  *aText = nullptr;
+
+  if (mAccessible->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  nsAutoString nodeValue;
+
+  nsCOMPtr<nsIDOMNode> DOMNode(do_QueryInterface(mAccessible->GetContent()));
+  DOMNode->GetNodeValue(nodeValue);
+  if (nodeValue.IsEmpty())
+    return S_FALSE;
+
+  *aText = ::SysAllocStringLen(nodeValue.get(), nodeValue.Length());
+  return *aText ? S_OK : E_OUTOFMEMORY;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+sdnTextAccessible::get_clippedSubstringBounds(unsigned int aStartIndex,
+                                              unsigned int aEndIndex,
+                                              int __RPC_FAR* aX,
+                                              int __RPC_FAR* aY,
+                                              int __RPC_FAR* aWidth,
+                                              int __RPC_FAR* aHeight)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  nscoord x = 0, y = 0, width = 0, height = 0;
+  HRESULT rv = get_unclippedSubstringBounds(aStartIndex, aEndIndex,
+                                            &x, &y, &width, &height);
+  if (FAILED(rv))
+    return rv;
+
+  DocAccessible* document = mAccessible->Document();
+  NS_ASSERTION(document,
+               "There must always be a doc accessible, but there isn't. Crash!");
+
+  nsIntRect docRect = document->Bounds();
+  nsIntRect unclippedRect(x, y, width, height);
+
+  nsIntRect clippedRect;
+  clippedRect.IntersectRect(unclippedRect, docRect);
+
+  *aX = clippedRect.x;
+  *aY = clippedRect.y;
+  *aWidth = clippedRect.width;
+  *aHeight = clippedRect.height;
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+sdnTextAccessible::get_unclippedSubstringBounds(unsigned int aStartIndex,
+                                                unsigned int aEndIndex,
+                                                int __RPC_FAR* aX,
+                                                int __RPC_FAR* aY,
+                                                int __RPC_FAR* aWidth,
+                                                int __RPC_FAR* aHeight)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aX || !aY || !aWidth || !aHeight)
+    return E_INVALIDARG;
+  *aX = *aY = *aWidth = *aHeight = 0;
+
+  if (mAccessible->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  nsIFrame *frame = mAccessible->GetFrame();
+  NS_ENSURE_TRUE(frame, E_FAIL);
+
+  nsPoint startPoint, endPoint;
+  nsIFrame* startFrame = GetPointFromOffset(frame, aStartIndex, true, startPoint);
+  nsIFrame* endFrame = GetPointFromOffset(frame, aEndIndex, false, endPoint);
+  if (!startFrame || !endFrame)
+    return E_FAIL;
+
+  nsRect sum;
+  nsIFrame* iter = startFrame;
+  nsIFrame* stopLoopFrame = endFrame->GetNextContinuation();
+  for (; iter != stopLoopFrame; iter = iter->GetNextContinuation()) {
+    nsRect rect = iter->GetScreenRectInAppUnits();
+    nscoord start = (iter == startFrame) ? startPoint.x : 0;
+    nscoord end = (iter == endFrame) ? endPoint.x : rect.width;
+    rect.x += start;
+    rect.width = end - start;
+    sum.UnionRect(sum, rect);
+  }
+
+  nsPresContext* presContext = mAccessible->Document()->PresContext();
+  *aX = presContext->AppUnitsToDevPixels(sum.x);
+  *aY = presContext->AppUnitsToDevPixels(sum.y);
+  *aWidth = presContext->AppUnitsToDevPixels(sum.width);
+  *aHeight = presContext->AppUnitsToDevPixels(sum.height);
+
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+sdnTextAccessible::scrollToSubstring(unsigned int aStartIndex,
+                                     unsigned int aEndIndex)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (mAccessible->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  RefPtr<nsRange> range = new nsRange(mAccessible->GetContent());
+  if (NS_FAILED(range->SetStart(mAccessible->GetContent(), aStartIndex)))
+    return E_FAIL;
+
+  if (NS_FAILED(range->SetEnd(mAccessible->GetContent(), aEndIndex)))
+    return E_FAIL;
+
+  nsresult rv =
+    nsCoreUtils::ScrollSubstringTo(mAccessible->GetFrame(), range,
+                                   nsIAccessibleScrollType::SCROLL_TYPE_ANYWHERE);
+  return GetHRESULT(rv);
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+sdnTextAccessible::get_fontFamily(BSTR __RPC_FAR* aFontFamily)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aFontFamily)
+    return E_INVALIDARG;
+  *aFontFamily = nullptr;
+
+  if (mAccessible->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  nsIFrame* frame = mAccessible->GetFrame();
+  if (!frame)
+    return E_FAIL;
+
+  RefPtr<nsFontMetrics> fm =
+    nsLayoutUtils::GetFontMetricsForFrame(frame, 1.0f);
+
+  const nsString& name =
+    fm->GetThebesFontGroup()->GetFirstValidFont()->GetName();
+  if (name.IsEmpty())
+    return S_FALSE;
+
+  *aFontFamily = ::SysAllocStringLen(name.get(), name.Length());
+  return *aFontFamily ? S_OK : E_OUTOFMEMORY;
+
+  A11Y_TRYBLOCK_END
+}
+
+nsIFrame*
+sdnTextAccessible::GetPointFromOffset(nsIFrame* aContainingFrame,
+                                      int32_t aOffset,
+                                      bool aPreferNext,
+                                      nsPoint& aOutPoint)
+{
+  nsIFrame* textFrame = nullptr;
+  int32_t outOffset;
+  aContainingFrame->GetChildFrameContainingOffset(aOffset, aPreferNext,
+                                                  &outOffset, &textFrame);
+  if (textFrame)
+    textFrame->GetPointFromOffset(aOffset, &aOutPoint);
+
+  return textFrame;
+}