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