1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/accessible/src/windows/sdn/sdnTextAccessible.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,211 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "sdnTextAccessible.h"
1.11 +
1.12 +#include "ISimpleDOMText_i.c"
1.13 +
1.14 +#include "nsCoreUtils.h"
1.15 +#include "DocAccessible.h"
1.16 +
1.17 +#include "nsIFrame.h"
1.18 +#include "nsFontMetrics.h"
1.19 +#include "nsPresContext.h"
1.20 +#include "nsLayoutUtils.h"
1.21 +#include "gfxFont.h"
1.22 +#include "nsIAccessibleTypes.h"
1.23 +#include "mozilla/gfx/2D.h"
1.24 +
1.25 +using namespace mozilla::a11y;
1.26 +
1.27 +////////////////////////////////////////////////////////////////////////////////
1.28 +// sdnTextAccessible
1.29 +////////////////////////////////////////////////////////////////////////////////
1.30 +
1.31 +IMPL_IUNKNOWN_QUERY_HEAD(sdnTextAccessible)
1.32 + IMPL_IUNKNOWN_QUERY_IFACE(ISimpleDOMText)
1.33 +IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(mAccessible)
1.34 +
1.35 +STDMETHODIMP
1.36 +sdnTextAccessible::get_domText(BSTR __RPC_FAR* aText)
1.37 +{
1.38 + A11Y_TRYBLOCK_BEGIN
1.39 +
1.40 + if (!aText)
1.41 + return E_INVALIDARG;
1.42 + *aText = nullptr;
1.43 +
1.44 + if (mAccessible->IsDefunct())
1.45 + return CO_E_OBJNOTCONNECTED;
1.46 +
1.47 + nsAutoString nodeValue;
1.48 +
1.49 + nsCOMPtr<nsIDOMNode> DOMNode(do_QueryInterface(mAccessible->GetContent()));
1.50 + DOMNode->GetNodeValue(nodeValue);
1.51 + if (nodeValue.IsEmpty())
1.52 + return S_FALSE;
1.53 +
1.54 + *aText = ::SysAllocStringLen(nodeValue.get(), nodeValue.Length());
1.55 + return *aText ? S_OK : E_OUTOFMEMORY;
1.56 +
1.57 + A11Y_TRYBLOCK_END
1.58 +}
1.59 +
1.60 +STDMETHODIMP
1.61 +sdnTextAccessible::get_clippedSubstringBounds(unsigned int aStartIndex,
1.62 + unsigned int aEndIndex,
1.63 + int __RPC_FAR* aX,
1.64 + int __RPC_FAR* aY,
1.65 + int __RPC_FAR* aWidth,
1.66 + int __RPC_FAR* aHeight)
1.67 +{
1.68 + A11Y_TRYBLOCK_BEGIN
1.69 +
1.70 + nscoord x = 0, y = 0, width = 0, height = 0;
1.71 + HRESULT rv = get_unclippedSubstringBounds(aStartIndex, aEndIndex,
1.72 + &x, &y, &width, &height);
1.73 + if (FAILED(rv))
1.74 + return rv;
1.75 +
1.76 + DocAccessible* document = mAccessible->Document();
1.77 + NS_ASSERTION(document,
1.78 + "There must always be a doc accessible, but there isn't. Crash!");
1.79 +
1.80 + nscoord docX = 0, docY = 0, docWidth = 0, docHeight = 0;
1.81 + document->GetBounds(&docX, &docY, &docWidth, &docHeight);
1.82 +
1.83 + nsIntRect unclippedRect(x, y, width, height);
1.84 + nsIntRect docRect(docX, docY, docWidth, docHeight);
1.85 +
1.86 + nsIntRect clippedRect;
1.87 + clippedRect.IntersectRect(unclippedRect, docRect);
1.88 +
1.89 + *aX = clippedRect.x;
1.90 + *aY = clippedRect.y;
1.91 + *aWidth = clippedRect.width;
1.92 + *aHeight = clippedRect.height;
1.93 + return S_OK;
1.94 +
1.95 + A11Y_TRYBLOCK_END
1.96 +}
1.97 +
1.98 +STDMETHODIMP
1.99 +sdnTextAccessible::get_unclippedSubstringBounds(unsigned int aStartIndex,
1.100 + unsigned int aEndIndex,
1.101 + int __RPC_FAR* aX,
1.102 + int __RPC_FAR* aY,
1.103 + int __RPC_FAR* aWidth,
1.104 + int __RPC_FAR* aHeight)
1.105 +{
1.106 + A11Y_TRYBLOCK_BEGIN
1.107 +
1.108 + if (!aX || !aY || !aWidth || !aHeight)
1.109 + return E_INVALIDARG;
1.110 + *aX = *aY = *aWidth = *aHeight = 0;
1.111 +
1.112 + if (mAccessible->IsDefunct())
1.113 + return CO_E_OBJNOTCONNECTED;
1.114 +
1.115 + nsIFrame *frame = mAccessible->GetFrame();
1.116 + NS_ENSURE_TRUE(frame, E_FAIL);
1.117 +
1.118 + nsPoint startPoint, endPoint;
1.119 + nsIFrame* startFrame = GetPointFromOffset(frame, aStartIndex, true, startPoint);
1.120 + nsIFrame* endFrame = GetPointFromOffset(frame, aEndIndex, false, endPoint);
1.121 + if (!startFrame || !endFrame)
1.122 + return E_FAIL;
1.123 +
1.124 + nsRect sum;
1.125 + nsIFrame* iter = startFrame;
1.126 + nsIFrame* stopLoopFrame = endFrame->GetNextContinuation();
1.127 + for (; iter != stopLoopFrame; iter = iter->GetNextContinuation()) {
1.128 + nsRect rect = iter->GetScreenRectInAppUnits();
1.129 + nscoord start = (iter == startFrame) ? startPoint.x : 0;
1.130 + nscoord end = (iter == endFrame) ? endPoint.x : rect.width;
1.131 + rect.x += start;
1.132 + rect.width = end - start;
1.133 + sum.UnionRect(sum, rect);
1.134 + }
1.135 +
1.136 + nsPresContext* presContext = mAccessible->Document()->PresContext();
1.137 + *aX = presContext->AppUnitsToDevPixels(sum.x);
1.138 + *aY = presContext->AppUnitsToDevPixels(sum.y);
1.139 + *aWidth = presContext->AppUnitsToDevPixels(sum.width);
1.140 + *aHeight = presContext->AppUnitsToDevPixels(sum.height);
1.141 +
1.142 + return S_OK;
1.143 +
1.144 + A11Y_TRYBLOCK_END
1.145 +}
1.146 +
1.147 +STDMETHODIMP
1.148 +sdnTextAccessible::scrollToSubstring(unsigned int aStartIndex,
1.149 + unsigned int aEndIndex)
1.150 +{
1.151 + A11Y_TRYBLOCK_BEGIN
1.152 +
1.153 + if (mAccessible->IsDefunct())
1.154 + return CO_E_OBJNOTCONNECTED;
1.155 +
1.156 + nsRefPtr<nsRange> range = new nsRange(mAccessible->GetContent());
1.157 + if (NS_FAILED(range->SetStart(mAccessible->GetContent(), aStartIndex)))
1.158 + return E_FAIL;
1.159 +
1.160 + if (NS_FAILED(range->SetEnd(mAccessible->GetContent(), aEndIndex)))
1.161 + return E_FAIL;
1.162 +
1.163 + nsresult rv =
1.164 + nsCoreUtils::ScrollSubstringTo(mAccessible->GetFrame(), range,
1.165 + nsIAccessibleScrollType::SCROLL_TYPE_ANYWHERE);
1.166 + return GetHRESULT(rv);
1.167 +
1.168 + A11Y_TRYBLOCK_END
1.169 +}
1.170 +
1.171 +STDMETHODIMP
1.172 +sdnTextAccessible::get_fontFamily(BSTR __RPC_FAR* aFontFamily)
1.173 +{
1.174 + A11Y_TRYBLOCK_BEGIN
1.175 +
1.176 + if (!aFontFamily)
1.177 + return E_INVALIDARG;
1.178 + *aFontFamily = nullptr;
1.179 +
1.180 + if (mAccessible->IsDefunct())
1.181 + return CO_E_OBJNOTCONNECTED;
1.182 +
1.183 + nsIFrame* frame = mAccessible->GetFrame();
1.184 + if (!frame)
1.185 + return E_FAIL;
1.186 +
1.187 + nsRefPtr<nsFontMetrics> fm;
1.188 + nsLayoutUtils::GetFontMetricsForFrame(frame, getter_AddRefs(fm));
1.189 +
1.190 + const nsString& name = fm->GetThebesFontGroup()->GetFontAt(0)->GetName();
1.191 + if (name.IsEmpty())
1.192 + return S_FALSE;
1.193 +
1.194 + *aFontFamily = ::SysAllocStringLen(name.get(), name.Length());
1.195 + return *aFontFamily ? S_OK : E_OUTOFMEMORY;
1.196 +
1.197 + A11Y_TRYBLOCK_END
1.198 +}
1.199 +
1.200 +nsIFrame*
1.201 +sdnTextAccessible::GetPointFromOffset(nsIFrame* aContainingFrame,
1.202 + int32_t aOffset,
1.203 + bool aPreferNext,
1.204 + nsPoint& aOutPoint)
1.205 +{
1.206 + nsIFrame* textFrame = nullptr;
1.207 + int32_t outOffset;
1.208 + aContainingFrame->GetChildFrameContainingOffset(aOffset, aPreferNext,
1.209 + &outOffset, &textFrame);
1.210 + if (textFrame)
1.211 + textFrame->GetPointFromOffset(aOffset, &aOutPoint);
1.212 +
1.213 + return textFrame;
1.214 +}
