Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 166 insertions, 0 deletions

diff --git a/accessible/windows/sdn/sdnTextAccessible.cpp b/accessible/windows/sdn/sdnTextAccessible.cpp
new file mode 100644
index 0000000000..73ef4eb6e8
--- /dev/null
+++ b/accessible/windows/sdn/sdnTextAccessible.cpp
@@ -0,0 +1,166 @@
+/* -*- 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 "ISimpleDOM.h"
+
+#include "nsCoreUtils.h"
+#include "DocAccessible.h"
+
+#include "nsIFrame.h"
+#include "nsFontMetrics.h"
+#include "nsPresContext.h"
+#include "nsLayoutUtils.h"
+#include "nsRange.h"
+#include "gfxTextRun.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(mMsaa)
+
+STDMETHODIMP
+sdnTextAccessible::get_domText(BSTR __RPC_FAR* aText) {
+  if (!aText) return E_INVALIDARG;
+  *aText = nullptr;
+
+  AccessibleWrap* acc = mMsaa->LocalAcc();
+  if (!acc) return CO_E_OBJNOTCONNECTED;
+
+  nsAutoString nodeValue;
+
+  acc->GetContent()->GetNodeValue(nodeValue);
+  if (nodeValue.IsEmpty()) return S_FALSE;
+
+  *aText = ::SysAllocStringLen(nodeValue.get(), nodeValue.Length());
+  return *aText ? S_OK : E_OUTOFMEMORY;
+}
+
+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) {
+  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 = mMsaa->LocalAcc()->Document();
+  NS_ASSERTION(
+      document,
+      "There must always be a doc accessible, but there isn't. Crash!");
+
+  LayoutDeviceIntRect docRect = document->Bounds();
+  LayoutDeviceIntRect unclippedRect(x, y, width, height);
+
+  LayoutDeviceIntRect clippedRect;
+  clippedRect.IntersectRect(unclippedRect, docRect);
+
+  *aX = clippedRect.X();
+  *aY = clippedRect.Y();
+  *aWidth = clippedRect.Width();
+  *aHeight = clippedRect.Height();
+  return S_OK;
+}
+
+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) {
+  if (!aX || !aY || !aWidth || !aHeight) return E_INVALIDARG;
+  *aX = *aY = *aWidth = *aHeight = 0;
+
+  AccessibleWrap* acc = mMsaa->LocalAcc();
+  if (!acc) return CO_E_OBJNOTCONNECTED;
+
+  nsIFrame* frame = acc->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.MoveByX(start);
+    rect.SetWidth(end - start);
+    sum.UnionRect(sum, rect);
+  }
+
+  nsPresContext* presContext = acc->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;
+}
+
+STDMETHODIMP
+sdnTextAccessible::scrollToSubstring(unsigned int aStartIndex,
+                                     unsigned int aEndIndex) {
+  AccessibleWrap* acc = mMsaa->LocalAcc();
+  if (!acc) return CO_E_OBJNOTCONNECTED;
+
+  RefPtr<nsRange> range = nsRange::Create(acc->GetContent());
+  if (NS_FAILED(range->SetStart(acc->GetContent(), aStartIndex))) return E_FAIL;
+
+  if (NS_FAILED(range->SetEnd(acc->GetContent(), aEndIndex))) return E_FAIL;
+
+  nsresult rv = nsCoreUtils::ScrollSubstringTo(
+      acc->GetFrame(), range, nsIAccessibleScrollType::SCROLL_TYPE_ANYWHERE);
+  return GetHRESULT(rv);
+}
+
+STDMETHODIMP
+sdnTextAccessible::get_fontFamily(BSTR __RPC_FAR* aFontFamily) {
+  if (!aFontFamily) return E_INVALIDARG;
+  *aFontFamily = nullptr;
+
+  AccessibleWrap* acc = mMsaa->LocalAcc();
+  if (!acc) return CO_E_OBJNOTCONNECTED;
+
+  nsIFrame* frame = acc->GetFrame();
+  if (!frame) return E_FAIL;
+
+  RefPtr<nsFontMetrics> fm = nsLayoutUtils::GetFontMetricsForFrame(frame, 1.0f);
+  RefPtr<gfxFont> font = fm->GetThebesFontGroup()->GetFirstValidFont();
+
+  const nsCString& name = font->GetName();
+  if (name.IsEmpty()) return S_FALSE;
+
+  NS_ConvertUTF8toUTF16 str(name);
+  *aFontFamily = ::SysAllocStringLen(str.get(), str.Length());
+  return *aFontFamily ? S_OK : E_OUTOFMEMORY;
+}
+
+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;
+}