mirror of
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3568d59638
--HG-- extra : commitid : DBGsn68FsG4 extra : rebase_source : 7b8f6211c2719dd017fef7e47d4dcdb3aeadfde4
2238 lines
74 KiB
C++
2238 lines
74 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 sw=2 et tw=78: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "HyperTextAccessible-inl.h"
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#include "Accessible-inl.h"
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#include "nsAccessibilityService.h"
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#include "nsIAccessibleTypes.h"
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#include "DocAccessible.h"
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#include "HTMLListAccessible.h"
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#include "Role.h"
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#include "States.h"
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#include "TextAttrs.h"
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#include "TextRange.h"
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#include "TreeWalker.h"
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#include "nsCaret.h"
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#include "nsContentUtils.h"
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#include "nsFocusManager.h"
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#include "nsIDOMRange.h"
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#include "nsIEditingSession.h"
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#include "nsContainerFrame.h"
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#include "nsFrameSelection.h"
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#include "nsILineIterator.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsIPersistentProperties2.h"
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#include "nsIScrollableFrame.h"
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#include "nsIServiceManager.h"
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#include "nsITextControlElement.h"
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#include "nsIMathMLFrame.h"
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#include "nsTextFragment.h"
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#include "mozilla/BinarySearch.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/EventStates.h"
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#include "mozilla/dom/Selection.h"
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#include "mozilla/MathAlgorithms.h"
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#include "gfxSkipChars.h"
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#include <algorithm>
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using namespace mozilla;
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// HyperTextAccessible
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////////////////////////////////////////////////////////////////////////////////
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HyperTextAccessible::
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HyperTextAccessible(nsIContent* aNode, DocAccessible* aDoc) :
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AccessibleWrap(aNode, aDoc)
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{
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mType = eHyperTextType;
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mGenericTypes |= eHyperText;
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}
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NS_IMPL_ISUPPORTS_INHERITED0(HyperTextAccessible, Accessible)
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role
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HyperTextAccessible::NativeRole()
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{
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a11y::role r = GetAccService()->MarkupRole(mContent);
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if (r != roles::NOTHING)
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return r;
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nsIFrame* frame = GetFrame();
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if (frame && frame->GetType() == nsGkAtoms::inlineFrame)
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return roles::TEXT;
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return roles::TEXT_CONTAINER;
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}
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uint64_t
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HyperTextAccessible::NativeState()
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{
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uint64_t states = AccessibleWrap::NativeState();
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if (mContent->AsElement()->State().HasState(NS_EVENT_STATE_MOZ_READWRITE)) {
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states |= states::EDITABLE;
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} else if (mContent->IsHTMLElement(nsGkAtoms::article)) {
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// We want <article> to behave like a document in terms of readonly state.
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states |= states::READONLY;
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}
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if (HasChildren())
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states |= states::SELECTABLE_TEXT;
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return states;
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}
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nsIntRect
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HyperTextAccessible::GetBoundsInFrame(nsIFrame* aFrame,
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uint32_t aStartRenderedOffset,
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uint32_t aEndRenderedOffset)
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{
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nsPresContext* presContext = mDoc->PresContext();
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if (aFrame->GetType() != nsGkAtoms::textFrame) {
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return aFrame->GetScreenRectInAppUnits().
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ToNearestPixels(presContext->AppUnitsPerDevPixel());
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}
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// Substring must be entirely within the same text node.
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int32_t startContentOffset, endContentOffset;
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nsresult rv = RenderedToContentOffset(aFrame, aStartRenderedOffset, &startContentOffset);
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NS_ENSURE_SUCCESS(rv, nsIntRect());
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rv = RenderedToContentOffset(aFrame, aEndRenderedOffset, &endContentOffset);
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NS_ENSURE_SUCCESS(rv, nsIntRect());
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nsIFrame *frame;
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int32_t startContentOffsetInFrame;
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// Get the right frame continuation -- not really a child, but a sibling of
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// the primary frame passed in
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rv = aFrame->GetChildFrameContainingOffset(startContentOffset, false,
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&startContentOffsetInFrame, &frame);
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NS_ENSURE_SUCCESS(rv, nsIntRect());
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nsRect screenRect;
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while (frame && startContentOffset < endContentOffset) {
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// Start with this frame's screen rect, which we will shrink based on
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// the substring we care about within it. We will then add that frame to
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// the total screenRect we are returning.
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nsRect frameScreenRect = frame->GetScreenRectInAppUnits();
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// Get the length of the substring in this frame that we want the bounds for
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int32_t startFrameTextOffset, endFrameTextOffset;
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frame->GetOffsets(startFrameTextOffset, endFrameTextOffset);
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int32_t frameTotalTextLength = endFrameTextOffset - startFrameTextOffset;
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int32_t seekLength = endContentOffset - startContentOffset;
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int32_t frameSubStringLength = std::min(frameTotalTextLength - startContentOffsetInFrame, seekLength);
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// Add the point where the string starts to the frameScreenRect
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nsPoint frameTextStartPoint;
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rv = frame->GetPointFromOffset(startContentOffset, &frameTextStartPoint);
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NS_ENSURE_SUCCESS(rv, nsIntRect());
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// Use the point for the end offset to calculate the width
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nsPoint frameTextEndPoint;
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rv = frame->GetPointFromOffset(startContentOffset + frameSubStringLength, &frameTextEndPoint);
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NS_ENSURE_SUCCESS(rv, nsIntRect());
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frameScreenRect.x += std::min(frameTextStartPoint.x, frameTextEndPoint.x);
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frameScreenRect.width = mozilla::Abs(frameTextStartPoint.x - frameTextEndPoint.x);
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screenRect.UnionRect(frameScreenRect, screenRect);
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// Get ready to loop back for next frame continuation
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startContentOffset += frameSubStringLength;
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startContentOffsetInFrame = 0;
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frame = frame->GetNextContinuation();
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}
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return screenRect.ToNearestPixels(presContext->AppUnitsPerDevPixel());
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}
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void
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HyperTextAccessible::TextSubstring(int32_t aStartOffset, int32_t aEndOffset,
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nsAString& aText)
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{
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aText.Truncate();
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index_t startOffset = ConvertMagicOffset(aStartOffset);
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index_t endOffset = ConvertMagicOffset(aEndOffset);
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if (!startOffset.IsValid() || !endOffset.IsValid() ||
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startOffset > endOffset || endOffset > CharacterCount()) {
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NS_ERROR("Wrong in offset");
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return;
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}
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int32_t startChildIdx = GetChildIndexAtOffset(startOffset);
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if (startChildIdx == -1)
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return;
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int32_t endChildIdx = GetChildIndexAtOffset(endOffset);
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if (endChildIdx == -1)
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return;
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if (startChildIdx == endChildIdx) {
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int32_t childOffset = GetChildOffset(startChildIdx);
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if (childOffset == -1)
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return;
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Accessible* child = GetChildAt(startChildIdx);
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child->AppendTextTo(aText, startOffset - childOffset,
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endOffset - startOffset);
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return;
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}
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int32_t startChildOffset = GetChildOffset(startChildIdx);
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if (startChildOffset == -1)
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return;
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Accessible* startChild = GetChildAt(startChildIdx);
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startChild->AppendTextTo(aText, startOffset - startChildOffset);
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for (int32_t childIdx = startChildIdx + 1; childIdx < endChildIdx; childIdx++) {
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Accessible* child = GetChildAt(childIdx);
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child->AppendTextTo(aText);
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}
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int32_t endChildOffset = GetChildOffset(endChildIdx);
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if (endChildOffset == -1)
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return;
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Accessible* endChild = GetChildAt(endChildIdx);
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endChild->AppendTextTo(aText, 0, endOffset - endChildOffset);
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}
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uint32_t
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HyperTextAccessible::DOMPointToOffset(nsINode* aNode, int32_t aNodeOffset,
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bool aIsEndOffset) const
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{
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if (!aNode)
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return 0;
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uint32_t offset = 0;
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nsINode* findNode = nullptr;
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if (aNodeOffset == -1) {
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findNode = aNode;
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} else if (aNode->IsNodeOfType(nsINode::eTEXT)) {
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// For text nodes, aNodeOffset comes in as a character offset
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// Text offset will be added at the end, if we find the offset in this hypertext
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// We want the "skipped" offset into the text (rendered text without the extra whitespace)
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nsIFrame* frame = aNode->AsContent()->GetPrimaryFrame();
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NS_ENSURE_TRUE(frame, 0);
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nsresult rv = ContentToRenderedOffset(frame, aNodeOffset, &offset);
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NS_ENSURE_SUCCESS(rv, 0);
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findNode = aNode;
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} else {
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// findNode could be null if aNodeOffset == # of child nodes, which means
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// one of two things:
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// 1) there are no children, and the passed-in node is not mContent -- use
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// parentContent for the node to find
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// 2) there are no children and the passed-in node is mContent, which means
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// we're an empty nsIAccessibleText
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// 3) there are children and we're at the end of the children
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findNode = aNode->GetChildAt(aNodeOffset);
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if (!findNode) {
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if (aNodeOffset == 0) {
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if (aNode == GetNode()) {
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// Case #1: this accessible has no children and thus has empty text,
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// we can only be at hypertext offset 0.
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return 0;
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}
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// Case #2: there are no children, we're at this node.
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findNode = aNode;
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} else if (aNodeOffset == static_cast<int32_t>(aNode->GetChildCount())) {
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// Case #3: we're after the last child, get next node to this one.
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for (nsINode* tmpNode = aNode;
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!findNode && tmpNode && tmpNode != mContent;
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tmpNode = tmpNode->GetParent()) {
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findNode = tmpNode->GetNextSibling();
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}
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}
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}
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}
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// Get accessible for this findNode, or if that node isn't accessible, use the
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// accessible for the next DOM node which has one (based on forward depth first search)
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Accessible* descendant = nullptr;
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if (findNode) {
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nsCOMPtr<nsIContent> findContent(do_QueryInterface(findNode));
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if (findContent && findContent->IsHTMLElement() &&
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findContent->NodeInfo()->Equals(nsGkAtoms::br) &&
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findContent->AttrValueIs(kNameSpaceID_None,
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nsGkAtoms::mozeditorbogusnode,
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nsGkAtoms::_true,
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eIgnoreCase)) {
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// This <br> is the hacky "bogus node" used when there is no text in a control
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return 0;
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}
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descendant = mDoc->GetAccessible(findNode);
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if (!descendant && findNode->IsContent()) {
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Accessible* container = mDoc->GetContainerAccessible(findNode);
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if (container) {
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TreeWalker walker(container, findNode->AsContent(),
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TreeWalker::eWalkContextTree);
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descendant = walker.NextChild();
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if (!descendant)
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descendant = container;
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}
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}
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}
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return TransformOffset(descendant, offset, aIsEndOffset);
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}
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uint32_t
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HyperTextAccessible::TransformOffset(Accessible* aDescendant,
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uint32_t aOffset, bool aIsEndOffset) const
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{
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// From the descendant, go up and get the immediate child of this hypertext.
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uint32_t offset = aOffset;
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Accessible* descendant = aDescendant;
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while (descendant) {
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Accessible* parent = descendant->Parent();
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if (parent == this)
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return GetChildOffset(descendant) + offset;
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// This offset no longer applies because the passed-in text object is not
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// a child of the hypertext. This happens when there are nested hypertexts,
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// e.g. <div>abc<h1>def</h1>ghi</div>. Thus we need to adjust the offset
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// to make it relative the hypertext.
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// If the end offset is not supposed to be inclusive and the original point
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// is not at 0 offset then the returned offset should be after an embedded
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// character the original point belongs to.
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if (aIsEndOffset)
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offset = (offset > 0 || descendant->IndexInParent() > 0) ? 1 : 0;
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else
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offset = 0;
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descendant = parent;
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}
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// If the given a11y point cannot be mapped into offset relative this hypertext
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// offset then return length as fallback value.
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return CharacterCount();
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}
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/**
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* GetElementAsContentOf() returns a content representing an element which is
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* or includes aNode.
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*
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* XXX This method is enough to retrieve ::before or ::after pseudo element.
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* So, if you want to use this for other purpose, you might need to check
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* ancestors too.
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*/
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static nsIContent* GetElementAsContentOf(nsINode* aNode)
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{
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if (aNode->IsElement()) {
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return aNode->AsContent();
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}
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nsIContent* parent = aNode->GetParent();
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return parent && parent->IsElement() ? parent : nullptr;
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}
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bool
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HyperTextAccessible::OffsetsToDOMRange(int32_t aStartOffset, int32_t aEndOffset,
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nsRange* aRange)
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{
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DOMPoint startPoint = OffsetToDOMPoint(aStartOffset);
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if (!startPoint.node)
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return false;
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// HyperTextAccessible manages pseudo elements generated by ::before or
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// ::after. However, contents of them are not in the DOM tree normally.
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// Therefore, they are not selectable and editable. So, when this creates
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// a DOM range, it should not start from nor end in any pseudo contents.
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nsIContent* container = GetElementAsContentOf(startPoint.node);
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DOMPoint startPointForDOMRange =
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ClosestNotGeneratedDOMPoint(startPoint, container);
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aRange->SetStart(startPointForDOMRange.node, startPointForDOMRange.idx);
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// If the caller wants collapsed range, let's collapse the range to its start.
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if (aStartOffset == aEndOffset) {
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aRange->Collapse(true);
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return true;
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}
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DOMPoint endPoint = OffsetToDOMPoint(aEndOffset);
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if (!endPoint.node)
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return false;
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if (startPoint.node != endPoint.node) {
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container = GetElementAsContentOf(endPoint.node);
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}
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DOMPoint endPointForDOMRange =
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ClosestNotGeneratedDOMPoint(endPoint, container);
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aRange->SetEnd(endPointForDOMRange.node, endPointForDOMRange.idx);
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return true;
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}
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DOMPoint
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HyperTextAccessible::OffsetToDOMPoint(int32_t aOffset)
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{
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// 0 offset is valid even if no children. In this case the associated editor
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// is empty so return a DOM point for editor root element.
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if (aOffset == 0) {
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nsCOMPtr<nsIEditor> editor = GetEditor();
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if (editor) {
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bool isEmpty = false;
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editor->GetDocumentIsEmpty(&isEmpty);
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if (isEmpty) {
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nsCOMPtr<nsIDOMElement> editorRootElm;
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editor->GetRootElement(getter_AddRefs(editorRootElm));
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nsCOMPtr<nsINode> editorRoot(do_QueryInterface(editorRootElm));
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return DOMPoint(editorRoot, 0);
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}
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}
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}
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int32_t childIdx = GetChildIndexAtOffset(aOffset);
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if (childIdx == -1)
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return DOMPoint();
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Accessible* child = GetChildAt(childIdx);
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int32_t innerOffset = aOffset - GetChildOffset(childIdx);
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// A text leaf case. The point is inside the text node.
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if (child->IsTextLeaf()) {
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nsIContent* content = child->GetContent();
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int32_t idx = 0;
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if (NS_FAILED(RenderedToContentOffset(content->GetPrimaryFrame(),
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innerOffset, &idx)))
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return DOMPoint();
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return DOMPoint(content, idx);
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}
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// Case of embedded object. The point is either before or after the element.
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NS_ASSERTION(innerOffset == 0 || innerOffset == 1, "A wrong inner offset!");
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nsINode* node = child->GetNode();
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nsINode* parentNode = node->GetParentNode();
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return parentNode ?
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DOMPoint(parentNode, parentNode->IndexOf(node) + innerOffset) :
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DOMPoint();
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}
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DOMPoint
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HyperTextAccessible::ClosestNotGeneratedDOMPoint(const DOMPoint& aDOMPoint,
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nsIContent* aElementContent)
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{
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MOZ_ASSERT(aDOMPoint.node, "The node must not be null");
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// ::before pseudo element
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if (aElementContent &&
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aElementContent->NodeInfo()->NameAtom() == nsGkAtoms::mozgeneratedcontentbefore) {
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MOZ_ASSERT(aElementContent->GetParent(),
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"::before must have parent element");
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// The first child of its parent (i.e., immediately after the ::before) is
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// good point for a DOM range.
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return DOMPoint(aElementContent->GetParent(), 0);
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}
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// ::after pseudo element
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if (aElementContent &&
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aElementContent->NodeInfo()->NameAtom() == nsGkAtoms::mozgeneratedcontentafter) {
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MOZ_ASSERT(aElementContent->GetParent(),
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"::after must have parent element");
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// The end of its parent (i.e., immediately before the ::after) is good
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// point for a DOM range.
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return DOMPoint(aElementContent->GetParent(),
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aElementContent->GetParent()->GetChildCount());
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}
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return aDOMPoint;
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}
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uint32_t
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HyperTextAccessible::FindOffset(uint32_t aOffset, nsDirection aDirection,
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nsSelectionAmount aAmount,
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EWordMovementType aWordMovementType)
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{
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NS_ASSERTION(aDirection == eDirPrevious || aAmount != eSelectBeginLine,
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"eSelectBeginLine should only be used with eDirPrevious");
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// Find a leaf accessible frame to start with. PeekOffset wants this.
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HyperTextAccessible* text = this;
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Accessible* child = nullptr;
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int32_t innerOffset = aOffset;
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do {
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int32_t childIdx = text->GetChildIndexAtOffset(innerOffset);
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// We can have an empty text leaf as our only child. Since empty text
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// leaves are not accessible we then have no children, but 0 is a valid
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// innerOffset.
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if (childIdx == -1) {
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NS_ASSERTION(innerOffset == 0 && !text->ChildCount(), "No childIdx?");
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return DOMPointToOffset(text->GetNode(), 0, aDirection == eDirNext);
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}
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child = text->GetChildAt(childIdx);
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// HTML list items may need special processing because PeekOffset doesn't
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// work with list bullets.
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if (text->IsHTMLListItem()) {
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HTMLLIAccessible* li = text->AsHTMLListItem();
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if (child == li->Bullet()) {
|
|
// XXX: the logic is broken for multichar bullets in moving by
|
|
// char/cluster/word cases.
|
|
if (text != this) {
|
|
return aDirection == eDirPrevious ?
|
|
TransformOffset(text, 0, false) :
|
|
TransformOffset(text, 1, true);
|
|
}
|
|
if (aDirection == eDirPrevious)
|
|
return 0;
|
|
|
|
uint32_t nextOffset = GetChildOffset(1);
|
|
if (nextOffset == 0)
|
|
return 0;
|
|
|
|
switch (aAmount) {
|
|
case eSelectLine:
|
|
case eSelectEndLine:
|
|
// Ask a text leaf next (if not empty) to the bullet for an offset
|
|
// since list item may be multiline.
|
|
return nextOffset < CharacterCount() ?
|
|
FindOffset(nextOffset, aDirection, aAmount, aWordMovementType) :
|
|
nextOffset;
|
|
|
|
default:
|
|
return nextOffset;
|
|
}
|
|
}
|
|
}
|
|
|
|
innerOffset -= text->GetChildOffset(childIdx);
|
|
|
|
text = child->AsHyperText();
|
|
} while (text);
|
|
|
|
nsIFrame* childFrame = child->GetFrame();
|
|
if (!childFrame) {
|
|
NS_ERROR("No child frame");
|
|
return 0;
|
|
}
|
|
|
|
int32_t innerContentOffset = innerOffset;
|
|
if (child->IsTextLeaf()) {
|
|
NS_ASSERTION(childFrame->GetType() == nsGkAtoms::textFrame, "Wrong frame!");
|
|
RenderedToContentOffset(childFrame, innerOffset, &innerContentOffset);
|
|
}
|
|
|
|
nsIFrame* frameAtOffset = childFrame;
|
|
int32_t unusedOffsetInFrame = 0;
|
|
childFrame->GetChildFrameContainingOffset(innerContentOffset, true,
|
|
&unusedOffsetInFrame,
|
|
&frameAtOffset);
|
|
|
|
const bool kIsJumpLinesOk = true; // okay to jump lines
|
|
const bool kIsScrollViewAStop = false; // do not stop at scroll views
|
|
const bool kIsKeyboardSelect = true; // is keyboard selection
|
|
const bool kIsVisualBidi = false; // use visual order for bidi text
|
|
nsPeekOffsetStruct pos(aAmount, aDirection, innerContentOffset,
|
|
nsPoint(0, 0), kIsJumpLinesOk, kIsScrollViewAStop,
|
|
kIsKeyboardSelect, kIsVisualBidi,
|
|
false, aWordMovementType);
|
|
nsresult rv = frameAtOffset->PeekOffset(&pos);
|
|
|
|
// PeekOffset fails on last/first lines of the text in certain cases.
|
|
if (NS_FAILED(rv) && aAmount == eSelectLine) {
|
|
pos.mAmount = (aDirection == eDirNext) ? eSelectEndLine : eSelectBeginLine;
|
|
frameAtOffset->PeekOffset(&pos);
|
|
}
|
|
if (!pos.mResultContent) {
|
|
NS_ERROR("No result content!");
|
|
return 0;
|
|
}
|
|
|
|
// Turn the resulting DOM point into an offset.
|
|
uint32_t hyperTextOffset = DOMPointToOffset(pos.mResultContent,
|
|
pos.mContentOffset,
|
|
aDirection == eDirNext);
|
|
|
|
if (aDirection == eDirPrevious) {
|
|
// If we reached the end during search, this means we didn't find the DOM point
|
|
// and we're actually at the start of the paragraph
|
|
if (hyperTextOffset == CharacterCount())
|
|
return 0;
|
|
|
|
// PeekOffset stops right before bullet so return 0 to workaround it.
|
|
if (IsHTMLListItem() && aAmount == eSelectBeginLine &&
|
|
hyperTextOffset > 0) {
|
|
Accessible* prevOffsetChild = GetChildAtOffset(hyperTextOffset - 1);
|
|
if (prevOffsetChild == AsHTMLListItem()->Bullet())
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return hyperTextOffset;
|
|
}
|
|
|
|
uint32_t
|
|
HyperTextAccessible::FindLineBoundary(uint32_t aOffset,
|
|
EWhichLineBoundary aWhichLineBoundary)
|
|
{
|
|
// Note: empty last line doesn't have own frame (a previous line contains '\n'
|
|
// character instead) thus when it makes a difference we need to process this
|
|
// case separately (otherwise operations are performed on previous line).
|
|
switch (aWhichLineBoundary) {
|
|
case ePrevLineBegin: {
|
|
// Fetch a previous line and move to its start (as arrow up and home keys
|
|
// were pressed).
|
|
if (IsEmptyLastLineOffset(aOffset))
|
|
return FindOffset(aOffset, eDirPrevious, eSelectBeginLine);
|
|
|
|
uint32_t tmpOffset = FindOffset(aOffset, eDirPrevious, eSelectLine);
|
|
return FindOffset(tmpOffset, eDirPrevious, eSelectBeginLine);
|
|
}
|
|
|
|
case ePrevLineEnd: {
|
|
if (IsEmptyLastLineOffset(aOffset))
|
|
return aOffset - 1;
|
|
|
|
// If offset is at first line then return 0 (first line start).
|
|
uint32_t tmpOffset = FindOffset(aOffset, eDirPrevious, eSelectBeginLine);
|
|
if (tmpOffset == 0)
|
|
return 0;
|
|
|
|
// Otherwise move to end of previous line (as arrow up and end keys were
|
|
// pressed).
|
|
tmpOffset = FindOffset(aOffset, eDirPrevious, eSelectLine);
|
|
return FindOffset(tmpOffset, eDirNext, eSelectEndLine);
|
|
}
|
|
|
|
case eThisLineBegin:
|
|
if (IsEmptyLastLineOffset(aOffset))
|
|
return aOffset;
|
|
|
|
// Move to begin of the current line (as home key was pressed).
|
|
return FindOffset(aOffset, eDirPrevious, eSelectBeginLine);
|
|
|
|
case eThisLineEnd:
|
|
if (IsEmptyLastLineOffset(aOffset))
|
|
return aOffset;
|
|
|
|
// Move to end of the current line (as end key was pressed).
|
|
return FindOffset(aOffset, eDirNext, eSelectEndLine);
|
|
|
|
case eNextLineBegin: {
|
|
if (IsEmptyLastLineOffset(aOffset))
|
|
return aOffset;
|
|
|
|
// Move to begin of the next line if any (arrow down and home keys),
|
|
// otherwise end of the current line (arrow down only).
|
|
uint32_t tmpOffset = FindOffset(aOffset, eDirNext, eSelectLine);
|
|
if (tmpOffset == CharacterCount())
|
|
return tmpOffset;
|
|
|
|
return FindOffset(tmpOffset, eDirPrevious, eSelectBeginLine);
|
|
}
|
|
|
|
case eNextLineEnd: {
|
|
if (IsEmptyLastLineOffset(aOffset))
|
|
return aOffset;
|
|
|
|
// Move to next line end (as down arrow and end key were pressed).
|
|
uint32_t tmpOffset = FindOffset(aOffset, eDirNext, eSelectLine);
|
|
if (tmpOffset == CharacterCount())
|
|
return tmpOffset;
|
|
|
|
return FindOffset(tmpOffset, eDirNext, eSelectEndLine);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::TextBeforeOffset(int32_t aOffset,
|
|
AccessibleTextBoundary aBoundaryType,
|
|
int32_t* aStartOffset, int32_t* aEndOffset,
|
|
nsAString& aText)
|
|
{
|
|
*aStartOffset = *aEndOffset = 0;
|
|
aText.Truncate();
|
|
|
|
index_t convertedOffset = ConvertMagicOffset(aOffset);
|
|
if (!convertedOffset.IsValid() || convertedOffset > CharacterCount()) {
|
|
NS_ERROR("Wrong in offset!");
|
|
return;
|
|
}
|
|
|
|
uint32_t adjustedOffset = convertedOffset;
|
|
if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET)
|
|
adjustedOffset = AdjustCaretOffset(adjustedOffset);
|
|
|
|
switch (aBoundaryType) {
|
|
case nsIAccessibleText::BOUNDARY_CHAR:
|
|
if (convertedOffset != 0)
|
|
CharAt(convertedOffset - 1, aText, aStartOffset, aEndOffset);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_WORD_START: {
|
|
// If the offset is a word start (except text length offset) then move
|
|
// backward to find a start offset (end offset is the given offset).
|
|
// Otherwise move backward twice to find both start and end offsets.
|
|
if (adjustedOffset == CharacterCount()) {
|
|
*aEndOffset = FindWordBoundary(adjustedOffset, eDirPrevious, eStartWord);
|
|
*aStartOffset = FindWordBoundary(*aEndOffset, eDirPrevious, eStartWord);
|
|
} else {
|
|
*aStartOffset = FindWordBoundary(adjustedOffset, eDirPrevious, eStartWord);
|
|
*aEndOffset = FindWordBoundary(*aStartOffset, eDirNext, eStartWord);
|
|
if (*aEndOffset != static_cast<int32_t>(adjustedOffset)) {
|
|
*aEndOffset = *aStartOffset;
|
|
*aStartOffset = FindWordBoundary(*aEndOffset, eDirPrevious, eStartWord);
|
|
}
|
|
}
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
}
|
|
|
|
case nsIAccessibleText::BOUNDARY_WORD_END: {
|
|
// Move word backward twice to find start and end offsets.
|
|
*aEndOffset = FindWordBoundary(convertedOffset, eDirPrevious, eEndWord);
|
|
*aStartOffset = FindWordBoundary(*aEndOffset, eDirPrevious, eEndWord);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
}
|
|
|
|
case nsIAccessibleText::BOUNDARY_LINE_START:
|
|
*aStartOffset = FindLineBoundary(adjustedOffset, ePrevLineBegin);
|
|
*aEndOffset = FindLineBoundary(adjustedOffset, eThisLineBegin);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_LINE_END: {
|
|
*aEndOffset = FindLineBoundary(adjustedOffset, ePrevLineEnd);
|
|
int32_t tmpOffset = *aEndOffset;
|
|
// Adjust offset if line is wrapped.
|
|
if (*aEndOffset != 0 && !IsLineEndCharAt(*aEndOffset))
|
|
tmpOffset--;
|
|
|
|
*aStartOffset = FindLineBoundary(tmpOffset, ePrevLineEnd);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::TextAtOffset(int32_t aOffset,
|
|
AccessibleTextBoundary aBoundaryType,
|
|
int32_t* aStartOffset, int32_t* aEndOffset,
|
|
nsAString& aText)
|
|
{
|
|
*aStartOffset = *aEndOffset = 0;
|
|
aText.Truncate();
|
|
|
|
uint32_t adjustedOffset = ConvertMagicOffset(aOffset);
|
|
if (adjustedOffset == std::numeric_limits<uint32_t>::max()) {
|
|
NS_ERROR("Wrong given offset!");
|
|
return;
|
|
}
|
|
|
|
switch (aBoundaryType) {
|
|
case nsIAccessibleText::BOUNDARY_CHAR:
|
|
// Return no char if caret is at the end of wrapped line (case of no line
|
|
// end character). Returning a next line char is confusing for AT.
|
|
if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET && IsCaretAtEndOfLine())
|
|
*aStartOffset = *aEndOffset = adjustedOffset;
|
|
else
|
|
CharAt(adjustedOffset, aText, aStartOffset, aEndOffset);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_WORD_START:
|
|
if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET)
|
|
adjustedOffset = AdjustCaretOffset(adjustedOffset);
|
|
|
|
*aEndOffset = FindWordBoundary(adjustedOffset, eDirNext, eStartWord);
|
|
*aStartOffset = FindWordBoundary(*aEndOffset, eDirPrevious, eStartWord);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_WORD_END:
|
|
// Ignore the spec and follow what WebKitGtk does because Orca expects it,
|
|
// i.e. return a next word at word end offset of the current word
|
|
// (WebKitGtk behavior) instead the current word (AKT spec).
|
|
*aEndOffset = FindWordBoundary(adjustedOffset, eDirNext, eEndWord);
|
|
*aStartOffset = FindWordBoundary(*aEndOffset, eDirPrevious, eEndWord);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_LINE_START:
|
|
if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET)
|
|
adjustedOffset = AdjustCaretOffset(adjustedOffset);
|
|
|
|
*aStartOffset = FindLineBoundary(adjustedOffset, eThisLineBegin);
|
|
*aEndOffset = FindLineBoundary(adjustedOffset, eNextLineBegin);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_LINE_END:
|
|
if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET)
|
|
adjustedOffset = AdjustCaretOffset(adjustedOffset);
|
|
|
|
// In contrast to word end boundary we follow the spec here.
|
|
*aStartOffset = FindLineBoundary(adjustedOffset, ePrevLineEnd);
|
|
*aEndOffset = FindLineBoundary(adjustedOffset, eThisLineEnd);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::TextAfterOffset(int32_t aOffset,
|
|
AccessibleTextBoundary aBoundaryType,
|
|
int32_t* aStartOffset, int32_t* aEndOffset,
|
|
nsAString& aText)
|
|
{
|
|
*aStartOffset = *aEndOffset = 0;
|
|
aText.Truncate();
|
|
|
|
index_t convertedOffset = ConvertMagicOffset(aOffset);
|
|
if (!convertedOffset.IsValid() || convertedOffset > CharacterCount()) {
|
|
NS_ERROR("Wrong in offset!");
|
|
return;
|
|
}
|
|
|
|
uint32_t adjustedOffset = convertedOffset;
|
|
if (aOffset == nsIAccessibleText::TEXT_OFFSET_CARET)
|
|
adjustedOffset = AdjustCaretOffset(adjustedOffset);
|
|
|
|
switch (aBoundaryType) {
|
|
case nsIAccessibleText::BOUNDARY_CHAR:
|
|
// If caret is at the end of wrapped line (case of no line end character)
|
|
// then char after the offset is a first char at next line.
|
|
if (adjustedOffset >= CharacterCount())
|
|
*aStartOffset = *aEndOffset = CharacterCount();
|
|
else
|
|
CharAt(adjustedOffset + 1, aText, aStartOffset, aEndOffset);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_WORD_START:
|
|
// Move word forward twice to find start and end offsets.
|
|
*aStartOffset = FindWordBoundary(adjustedOffset, eDirNext, eStartWord);
|
|
*aEndOffset = FindWordBoundary(*aStartOffset, eDirNext, eStartWord);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_WORD_END:
|
|
// If the offset is a word end (except 0 offset) then move forward to find
|
|
// end offset (start offset is the given offset). Otherwise move forward
|
|
// twice to find both start and end offsets.
|
|
if (convertedOffset == 0) {
|
|
*aStartOffset = FindWordBoundary(convertedOffset, eDirNext, eEndWord);
|
|
*aEndOffset = FindWordBoundary(*aStartOffset, eDirNext, eEndWord);
|
|
} else {
|
|
*aEndOffset = FindWordBoundary(convertedOffset, eDirNext, eEndWord);
|
|
*aStartOffset = FindWordBoundary(*aEndOffset, eDirPrevious, eEndWord);
|
|
if (*aStartOffset != static_cast<int32_t>(convertedOffset)) {
|
|
*aStartOffset = *aEndOffset;
|
|
*aEndOffset = FindWordBoundary(*aStartOffset, eDirNext, eEndWord);
|
|
}
|
|
}
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_LINE_START:
|
|
*aStartOffset = FindLineBoundary(adjustedOffset, eNextLineBegin);
|
|
*aEndOffset = FindLineBoundary(*aStartOffset, eNextLineBegin);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
|
|
case nsIAccessibleText::BOUNDARY_LINE_END:
|
|
*aStartOffset = FindLineBoundary(adjustedOffset, eThisLineEnd);
|
|
*aEndOffset = FindLineBoundary(adjustedOffset, eNextLineEnd);
|
|
TextSubstring(*aStartOffset, *aEndOffset, aText);
|
|
break;
|
|
}
|
|
}
|
|
|
|
already_AddRefed<nsIPersistentProperties>
|
|
HyperTextAccessible::TextAttributes(bool aIncludeDefAttrs, int32_t aOffset,
|
|
int32_t* aStartOffset,
|
|
int32_t* aEndOffset)
|
|
{
|
|
// 1. Get each attribute and its ranges one after another.
|
|
// 2. As we get each new attribute, we pass the current start and end offsets
|
|
// as in/out parameters. In other words, as attributes are collected,
|
|
// the attribute range itself can only stay the same or get smaller.
|
|
|
|
*aStartOffset = *aEndOffset = 0;
|
|
index_t offset = ConvertMagicOffset(aOffset);
|
|
if (!offset.IsValid() || offset > CharacterCount()) {
|
|
NS_ERROR("Wrong in offset!");
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIPersistentProperties> attributes =
|
|
do_CreateInstance(NS_PERSISTENTPROPERTIES_CONTRACTID);
|
|
|
|
Accessible* accAtOffset = GetChildAtOffset(offset);
|
|
if (!accAtOffset) {
|
|
// Offset 0 is correct offset when accessible has empty text. Include
|
|
// default attributes if they were requested, otherwise return empty set.
|
|
if (offset == 0) {
|
|
if (aIncludeDefAttrs) {
|
|
TextAttrsMgr textAttrsMgr(this);
|
|
textAttrsMgr.GetAttributes(attributes);
|
|
}
|
|
return attributes.forget();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
int32_t accAtOffsetIdx = accAtOffset->IndexInParent();
|
|
uint32_t startOffset = GetChildOffset(accAtOffsetIdx);
|
|
uint32_t endOffset = GetChildOffset(accAtOffsetIdx + 1);
|
|
int32_t offsetInAcc = offset - startOffset;
|
|
|
|
TextAttrsMgr textAttrsMgr(this, aIncludeDefAttrs, accAtOffset,
|
|
accAtOffsetIdx);
|
|
textAttrsMgr.GetAttributes(attributes, &startOffset, &endOffset);
|
|
|
|
// Compute spelling attributes on text accessible only.
|
|
nsIFrame *offsetFrame = accAtOffset->GetFrame();
|
|
if (offsetFrame && offsetFrame->GetType() == nsGkAtoms::textFrame) {
|
|
int32_t nodeOffset = 0;
|
|
RenderedToContentOffset(offsetFrame, offsetInAcc, &nodeOffset);
|
|
|
|
// Set 'misspelled' text attribute.
|
|
GetSpellTextAttr(accAtOffset->GetNode(), nodeOffset,
|
|
&startOffset, &endOffset, attributes);
|
|
}
|
|
|
|
*aStartOffset = startOffset;
|
|
*aEndOffset = endOffset;
|
|
return attributes.forget();
|
|
}
|
|
|
|
already_AddRefed<nsIPersistentProperties>
|
|
HyperTextAccessible::DefaultTextAttributes()
|
|
{
|
|
nsCOMPtr<nsIPersistentProperties> attributes =
|
|
do_CreateInstance(NS_PERSISTENTPROPERTIES_CONTRACTID);
|
|
|
|
TextAttrsMgr textAttrsMgr(this);
|
|
textAttrsMgr.GetAttributes(attributes);
|
|
return attributes.forget();
|
|
}
|
|
|
|
int32_t
|
|
HyperTextAccessible::GetLevelInternal()
|
|
{
|
|
if (mContent->IsHTMLElement(nsGkAtoms::h1))
|
|
return 1;
|
|
if (mContent->IsHTMLElement(nsGkAtoms::h2))
|
|
return 2;
|
|
if (mContent->IsHTMLElement(nsGkAtoms::h3))
|
|
return 3;
|
|
if (mContent->IsHTMLElement(nsGkAtoms::h4))
|
|
return 4;
|
|
if (mContent->IsHTMLElement(nsGkAtoms::h5))
|
|
return 5;
|
|
if (mContent->IsHTMLElement(nsGkAtoms::h6))
|
|
return 6;
|
|
|
|
return AccessibleWrap::GetLevelInternal();
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::SetMathMLXMLRoles(nsIPersistentProperties* aAttributes)
|
|
{
|
|
// Add MathML xmlroles based on the position inside the parent.
|
|
Accessible* parent = Parent();
|
|
if (parent) {
|
|
switch (parent->Role()) {
|
|
case roles::MATHML_CELL:
|
|
case roles::MATHML_ENCLOSED:
|
|
case roles::MATHML_ERROR:
|
|
case roles::MATHML_MATH:
|
|
case roles::MATHML_ROW:
|
|
case roles::MATHML_SQUARE_ROOT:
|
|
case roles::MATHML_STYLE:
|
|
if (Role() == roles::MATHML_OPERATOR) {
|
|
// This is an operator inside an <mrow> (or an inferred <mrow>).
|
|
// See http://www.w3.org/TR/MathML3/chapter3.html#presm.inferredmrow
|
|
// XXX We should probably do something similar for MATHML_FENCED, but
|
|
// operators do not appear in the accessible tree. See bug 1175747.
|
|
nsIMathMLFrame* mathMLFrame = do_QueryFrame(GetFrame());
|
|
if (mathMLFrame) {
|
|
nsEmbellishData embellishData;
|
|
mathMLFrame->GetEmbellishData(embellishData);
|
|
if (NS_MATHML_EMBELLISH_IS_FENCE(embellishData.flags)) {
|
|
if (!PrevSibling()) {
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
nsGkAtoms::open_fence);
|
|
} else if (!NextSibling()) {
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
nsGkAtoms::close_fence);
|
|
}
|
|
}
|
|
if (NS_MATHML_EMBELLISH_IS_SEPARATOR(embellishData.flags)) {
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
nsGkAtoms::separator_);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case roles::MATHML_FRACTION:
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
IndexInParent() == 0 ?
|
|
nsGkAtoms::numerator :
|
|
nsGkAtoms::denominator);
|
|
break;
|
|
case roles::MATHML_ROOT:
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
IndexInParent() == 0 ? nsGkAtoms::base :
|
|
nsGkAtoms::root_index);
|
|
break;
|
|
case roles::MATHML_SUB:
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
IndexInParent() == 0 ? nsGkAtoms::base :
|
|
nsGkAtoms::subscript);
|
|
break;
|
|
case roles::MATHML_SUP:
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
IndexInParent() == 0 ? nsGkAtoms::base :
|
|
nsGkAtoms::superscript);
|
|
break;
|
|
case roles::MATHML_SUB_SUP: {
|
|
int32_t index = IndexInParent();
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
index == 0 ? nsGkAtoms::base :
|
|
(index == 1 ? nsGkAtoms::subscript :
|
|
nsGkAtoms::superscript));
|
|
} break;
|
|
case roles::MATHML_UNDER:
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
IndexInParent() == 0 ? nsGkAtoms::base :
|
|
nsGkAtoms::underscript);
|
|
break;
|
|
case roles::MATHML_OVER:
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
IndexInParent() == 0 ? nsGkAtoms::base :
|
|
nsGkAtoms::overscript);
|
|
break;
|
|
case roles::MATHML_UNDER_OVER: {
|
|
int32_t index = IndexInParent();
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
index == 0 ? nsGkAtoms::base :
|
|
(index == 1 ? nsGkAtoms::underscript :
|
|
nsGkAtoms::overscript));
|
|
} break;
|
|
case roles::MATHML_MULTISCRIPTS: {
|
|
// Get the <multiscripts> base.
|
|
nsIContent* child;
|
|
bool baseFound = false;
|
|
for (child = parent->GetContent()->GetFirstChild(); child;
|
|
child = child->GetNextSibling()) {
|
|
if (child->IsMathMLElement()) {
|
|
baseFound = true;
|
|
break;
|
|
}
|
|
}
|
|
if (baseFound) {
|
|
nsIContent* content = GetContent();
|
|
if (child == content) {
|
|
// We are the base.
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
nsGkAtoms::base);
|
|
} else {
|
|
// Browse the list of scripts to find us and determine our type.
|
|
bool postscript = true;
|
|
bool subscript = true;
|
|
for (child = child->GetNextSibling(); child;
|
|
child = child->GetNextSibling()) {
|
|
if (!child->IsMathMLElement())
|
|
continue;
|
|
if (child->IsMathMLElement(nsGkAtoms::mprescripts_)) {
|
|
postscript = false;
|
|
subscript = true;
|
|
continue;
|
|
}
|
|
if (child == content) {
|
|
if (postscript) {
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
subscript ?
|
|
nsGkAtoms::subscript :
|
|
nsGkAtoms::superscript);
|
|
} else {
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::xmlroles,
|
|
subscript ?
|
|
nsGkAtoms::presubscript :
|
|
nsGkAtoms::presuperscript);
|
|
}
|
|
break;
|
|
}
|
|
subscript = !subscript;
|
|
}
|
|
}
|
|
}
|
|
} break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
already_AddRefed<nsIPersistentProperties>
|
|
HyperTextAccessible::NativeAttributes()
|
|
{
|
|
nsCOMPtr<nsIPersistentProperties> attributes =
|
|
AccessibleWrap::NativeAttributes();
|
|
|
|
// 'formatting' attribute is deprecated, 'display' attribute should be
|
|
// instead.
|
|
nsIFrame *frame = GetFrame();
|
|
if (frame && frame->GetType() == nsGkAtoms::blockFrame) {
|
|
nsAutoString unused;
|
|
attributes->SetStringProperty(NS_LITERAL_CSTRING("formatting"),
|
|
NS_LITERAL_STRING("block"), unused);
|
|
}
|
|
|
|
if (FocusMgr()->IsFocused(this)) {
|
|
int32_t lineNumber = CaretLineNumber();
|
|
if (lineNumber >= 1) {
|
|
nsAutoString strLineNumber;
|
|
strLineNumber.AppendInt(lineNumber);
|
|
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::lineNumber, strLineNumber);
|
|
}
|
|
}
|
|
|
|
if (HasOwnContent()) {
|
|
GetAccService()->MarkupAttributes(mContent, attributes);
|
|
if (mContent->IsMathMLElement())
|
|
SetMathMLXMLRoles(attributes);
|
|
}
|
|
|
|
return attributes.forget();
|
|
}
|
|
|
|
nsIAtom*
|
|
HyperTextAccessible::LandmarkRole() const
|
|
{
|
|
if (!HasOwnContent())
|
|
return nullptr;
|
|
|
|
// For the html landmark elements we expose them like we do ARIA landmarks to
|
|
// make AT navigation schemes "just work".
|
|
if (mContent->IsHTMLElement(nsGkAtoms::nav)) {
|
|
return nsGkAtoms::navigation;
|
|
}
|
|
|
|
if (mContent->IsAnyOfHTMLElements(nsGkAtoms::header,
|
|
nsGkAtoms::footer)) {
|
|
// Only map header and footer if they are not descendants of an article
|
|
// or section tag.
|
|
nsIContent* parent = mContent->GetParent();
|
|
while (parent) {
|
|
if (parent->IsAnyOfHTMLElements(nsGkAtoms::article, nsGkAtoms::section)) {
|
|
break;
|
|
}
|
|
parent = parent->GetParent();
|
|
}
|
|
|
|
// No article or section elements found.
|
|
if (!parent) {
|
|
if (mContent->IsHTMLElement(nsGkAtoms::header)) {
|
|
return nsGkAtoms::banner;
|
|
}
|
|
|
|
if (mContent->IsHTMLElement(nsGkAtoms::footer)) {
|
|
return nsGkAtoms::contentinfo;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
if (mContent->IsHTMLElement(nsGkAtoms::aside)) {
|
|
return nsGkAtoms::complementary;
|
|
}
|
|
|
|
if (mContent->IsHTMLElement(nsGkAtoms::main)) {
|
|
return nsGkAtoms::main;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
int32_t
|
|
HyperTextAccessible::OffsetAtPoint(int32_t aX, int32_t aY, uint32_t aCoordType)
|
|
{
|
|
nsIFrame* hyperFrame = GetFrame();
|
|
if (!hyperFrame)
|
|
return -1;
|
|
|
|
nsIntPoint coords = nsAccUtils::ConvertToScreenCoords(aX, aY, aCoordType,
|
|
this);
|
|
|
|
nsPresContext* presContext = mDoc->PresContext();
|
|
nsPoint coordsInAppUnits =
|
|
ToAppUnits(coords, presContext->AppUnitsPerDevPixel());
|
|
|
|
nsRect frameScreenRect = hyperFrame->GetScreenRectInAppUnits();
|
|
if (!frameScreenRect.Contains(coordsInAppUnits.x, coordsInAppUnits.y))
|
|
return -1; // Not found
|
|
|
|
nsPoint pointInHyperText(coordsInAppUnits.x - frameScreenRect.x,
|
|
coordsInAppUnits.y - frameScreenRect.y);
|
|
|
|
// Go through the frames to check if each one has the point.
|
|
// When one does, add up the character offsets until we have a match
|
|
|
|
// We have an point in an accessible child of this, now we need to add up the
|
|
// offsets before it to what we already have
|
|
int32_t offset = 0;
|
|
uint32_t childCount = ChildCount();
|
|
for (uint32_t childIdx = 0; childIdx < childCount; childIdx++) {
|
|
Accessible* childAcc = mChildren[childIdx];
|
|
|
|
nsIFrame *primaryFrame = childAcc->GetFrame();
|
|
NS_ENSURE_TRUE(primaryFrame, -1);
|
|
|
|
nsIFrame *frame = primaryFrame;
|
|
while (frame) {
|
|
nsIContent *content = frame->GetContent();
|
|
NS_ENSURE_TRUE(content, -1);
|
|
nsPoint pointInFrame = pointInHyperText - frame->GetOffsetTo(hyperFrame);
|
|
nsSize frameSize = frame->GetSize();
|
|
if (pointInFrame.x < frameSize.width && pointInFrame.y < frameSize.height) {
|
|
// Finished
|
|
if (frame->GetType() == nsGkAtoms::textFrame) {
|
|
nsIFrame::ContentOffsets contentOffsets =
|
|
frame->GetContentOffsetsFromPointExternal(pointInFrame, nsIFrame::IGNORE_SELECTION_STYLE);
|
|
if (contentOffsets.IsNull() || contentOffsets.content != content) {
|
|
return -1; // Not found
|
|
}
|
|
uint32_t addToOffset;
|
|
nsresult rv = ContentToRenderedOffset(primaryFrame,
|
|
contentOffsets.offset,
|
|
&addToOffset);
|
|
NS_ENSURE_SUCCESS(rv, -1);
|
|
offset += addToOffset;
|
|
}
|
|
return offset;
|
|
}
|
|
frame = frame->GetNextContinuation();
|
|
}
|
|
|
|
offset += nsAccUtils::TextLength(childAcc);
|
|
}
|
|
|
|
return -1; // Not found
|
|
}
|
|
|
|
nsIntRect
|
|
HyperTextAccessible::TextBounds(int32_t aStartOffset, int32_t aEndOffset,
|
|
uint32_t aCoordType)
|
|
{
|
|
index_t startOffset = ConvertMagicOffset(aStartOffset);
|
|
index_t endOffset = ConvertMagicOffset(aEndOffset);
|
|
if (!startOffset.IsValid() || !endOffset.IsValid() ||
|
|
startOffset > endOffset || endOffset > CharacterCount()) {
|
|
NS_ERROR("Wrong in offset");
|
|
return nsIntRect();
|
|
}
|
|
|
|
|
|
int32_t childIdx = GetChildIndexAtOffset(startOffset);
|
|
if (childIdx == -1)
|
|
return nsIntRect();
|
|
|
|
nsIntRect bounds;
|
|
int32_t prevOffset = GetChildOffset(childIdx);
|
|
int32_t offset1 = startOffset - prevOffset;
|
|
|
|
while (childIdx < static_cast<int32_t>(ChildCount())) {
|
|
nsIFrame* frame = GetChildAt(childIdx++)->GetFrame();
|
|
if (!frame) {
|
|
NS_NOTREACHED("No frame for a child!");
|
|
continue;
|
|
}
|
|
|
|
int32_t nextOffset = GetChildOffset(childIdx);
|
|
if (nextOffset >= static_cast<int32_t>(endOffset)) {
|
|
bounds.UnionRect(bounds, GetBoundsInFrame(frame, offset1,
|
|
endOffset - prevOffset));
|
|
break;
|
|
}
|
|
|
|
bounds.UnionRect(bounds, GetBoundsInFrame(frame, offset1,
|
|
nextOffset - prevOffset));
|
|
|
|
prevOffset = nextOffset;
|
|
offset1 = 0;
|
|
}
|
|
|
|
nsAccUtils::ConvertScreenCoordsTo(&bounds.x, &bounds.y, aCoordType, this);
|
|
return bounds;
|
|
}
|
|
|
|
already_AddRefed<nsIEditor>
|
|
HyperTextAccessible::GetEditor() const
|
|
{
|
|
if (!mContent->HasFlag(NODE_IS_EDITABLE)) {
|
|
// If we're inside an editable container, then return that container's editor
|
|
Accessible* ancestor = Parent();
|
|
while (ancestor) {
|
|
HyperTextAccessible* hyperText = ancestor->AsHyperText();
|
|
if (hyperText) {
|
|
// Recursion will stop at container doc because it has its own impl
|
|
// of GetEditor()
|
|
return hyperText->GetEditor();
|
|
}
|
|
|
|
ancestor = ancestor->Parent();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIDocShell> docShell = nsCoreUtils::GetDocShellFor(mContent);
|
|
nsCOMPtr<nsIEditingSession> editingSession(do_GetInterface(docShell));
|
|
if (!editingSession)
|
|
return nullptr; // No editing session interface
|
|
|
|
nsCOMPtr<nsIEditor> editor;
|
|
nsIDocument* docNode = mDoc->DocumentNode();
|
|
editingSession->GetEditorForWindow(docNode->GetWindow(),
|
|
getter_AddRefs(editor));
|
|
return editor.forget();
|
|
}
|
|
|
|
/**
|
|
* =================== Caret & Selection ======================
|
|
*/
|
|
|
|
nsresult
|
|
HyperTextAccessible::SetSelectionRange(int32_t aStartPos, int32_t aEndPos)
|
|
{
|
|
// Before setting the selection range, we need to ensure that the editor
|
|
// is initialized. (See bug 804927.)
|
|
// Otherwise, it's possible that lazy editor initialization will override
|
|
// the selection we set here and leave the caret at the end of the text.
|
|
// By calling GetEditor here, we ensure that editor initialization is
|
|
// completed before we set the selection.
|
|
nsCOMPtr<nsIEditor> editor = GetEditor();
|
|
|
|
bool isFocusable = InteractiveState() & states::FOCUSABLE;
|
|
|
|
// If accessible is focusable then focus it before setting the selection to
|
|
// neglect control's selection changes on focus if any (for example, inputs
|
|
// that do select all on focus).
|
|
// some input controls
|
|
if (isFocusable)
|
|
TakeFocus();
|
|
|
|
dom::Selection* domSel = DOMSelection();
|
|
NS_ENSURE_STATE(domSel);
|
|
|
|
// Set up the selection.
|
|
for (int32_t idx = domSel->RangeCount() - 1; idx > 0; idx--)
|
|
domSel->RemoveRange(domSel->GetRangeAt(idx));
|
|
SetSelectionBoundsAt(0, aStartPos, aEndPos);
|
|
|
|
// When selection is done, move the focus to the selection if accessible is
|
|
// not focusable. That happens when selection is set within hypertext
|
|
// accessible.
|
|
if (isFocusable)
|
|
return NS_OK;
|
|
|
|
nsFocusManager* DOMFocusManager = nsFocusManager::GetFocusManager();
|
|
if (DOMFocusManager) {
|
|
NS_ENSURE_TRUE(mDoc, NS_ERROR_FAILURE);
|
|
nsIDocument* docNode = mDoc->DocumentNode();
|
|
NS_ENSURE_TRUE(docNode, NS_ERROR_FAILURE);
|
|
nsCOMPtr<nsPIDOMWindow> window = docNode->GetWindow();
|
|
nsCOMPtr<nsIDOMElement> result;
|
|
DOMFocusManager->MoveFocus(window, nullptr, nsIFocusManager::MOVEFOCUS_CARET,
|
|
nsIFocusManager::FLAG_BYMOVEFOCUS, getter_AddRefs(result));
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
int32_t
|
|
HyperTextAccessible::CaretOffset() const
|
|
{
|
|
// Not focused focusable accessible except document accessible doesn't have
|
|
// a caret.
|
|
if (!IsDoc() && !FocusMgr()->IsFocused(this) &&
|
|
(InteractiveState() & states::FOCUSABLE)) {
|
|
return -1;
|
|
}
|
|
|
|
// Check cached value.
|
|
int32_t caretOffset = -1;
|
|
HyperTextAccessible* text = SelectionMgr()->AccessibleWithCaret(&caretOffset);
|
|
|
|
// Use cached value if it corresponds to this accessible.
|
|
if (caretOffset != -1) {
|
|
if (text == this)
|
|
return caretOffset;
|
|
|
|
nsINode* textNode = text->GetNode();
|
|
// Ignore offset if cached accessible isn't a text leaf.
|
|
if (nsCoreUtils::IsAncestorOf(GetNode(), textNode))
|
|
return TransformOffset(text,
|
|
textNode->IsNodeOfType(nsINode::eTEXT) ? caretOffset : 0, false);
|
|
}
|
|
|
|
// No caret if the focused node is not inside this DOM node and this DOM node
|
|
// is not inside of focused node.
|
|
FocusManager::FocusDisposition focusDisp =
|
|
FocusMgr()->IsInOrContainsFocus(this);
|
|
if (focusDisp == FocusManager::eNone)
|
|
return -1;
|
|
|
|
// Turn the focus node and offset of the selection into caret hypretext
|
|
// offset.
|
|
dom::Selection* domSel = DOMSelection();
|
|
NS_ENSURE_TRUE(domSel, -1);
|
|
|
|
nsINode* focusNode = domSel->GetFocusNode();
|
|
uint32_t focusOffset = domSel->FocusOffset();
|
|
|
|
// No caret if this DOM node is inside of focused node but the selection's
|
|
// focus point is not inside of this DOM node.
|
|
if (focusDisp == FocusManager::eContainedByFocus) {
|
|
nsINode* resultNode =
|
|
nsCoreUtils::GetDOMNodeFromDOMPoint(focusNode, focusOffset);
|
|
|
|
nsINode* thisNode = GetNode();
|
|
if (resultNode != thisNode &&
|
|
!nsCoreUtils::IsAncestorOf(thisNode, resultNode))
|
|
return -1;
|
|
}
|
|
|
|
return DOMPointToOffset(focusNode, focusOffset);
|
|
}
|
|
|
|
int32_t
|
|
HyperTextAccessible::CaretLineNumber()
|
|
{
|
|
// Provide the line number for the caret, relative to the
|
|
// currently focused node. Use a 1-based index
|
|
RefPtr<nsFrameSelection> frameSelection = FrameSelection();
|
|
if (!frameSelection)
|
|
return -1;
|
|
|
|
dom::Selection* domSel =
|
|
frameSelection->GetSelection(nsISelectionController::SELECTION_NORMAL);
|
|
if (!domSel)
|
|
return - 1;
|
|
|
|
nsINode* caretNode = domSel->GetFocusNode();
|
|
if (!caretNode || !caretNode->IsContent())
|
|
return -1;
|
|
|
|
nsIContent* caretContent = caretNode->AsContent();
|
|
if (!nsCoreUtils::IsAncestorOf(GetNode(), caretContent))
|
|
return -1;
|
|
|
|
int32_t returnOffsetUnused;
|
|
uint32_t caretOffset = domSel->FocusOffset();
|
|
CaretAssociationHint hint = frameSelection->GetHint();
|
|
nsIFrame *caretFrame = frameSelection->GetFrameForNodeOffset(caretContent, caretOffset,
|
|
hint, &returnOffsetUnused);
|
|
NS_ENSURE_TRUE(caretFrame, -1);
|
|
|
|
int32_t lineNumber = 1;
|
|
nsAutoLineIterator lineIterForCaret;
|
|
nsIContent *hyperTextContent = IsContent() ? mContent.get() : nullptr;
|
|
while (caretFrame) {
|
|
if (hyperTextContent == caretFrame->GetContent()) {
|
|
return lineNumber; // Must be in a single line hyper text, there is no line iterator
|
|
}
|
|
nsContainerFrame *parentFrame = caretFrame->GetParent();
|
|
if (!parentFrame)
|
|
break;
|
|
|
|
// Add lines for the sibling frames before the caret
|
|
nsIFrame *sibling = parentFrame->GetFirstPrincipalChild();
|
|
while (sibling && sibling != caretFrame) {
|
|
nsAutoLineIterator lineIterForSibling = sibling->GetLineIterator();
|
|
if (lineIterForSibling) {
|
|
// For the frames before that grab all the lines
|
|
int32_t addLines = lineIterForSibling->GetNumLines();
|
|
lineNumber += addLines;
|
|
}
|
|
sibling = sibling->GetNextSibling();
|
|
}
|
|
|
|
// Get the line number relative to the container with lines
|
|
if (!lineIterForCaret) { // Add the caret line just once
|
|
lineIterForCaret = parentFrame->GetLineIterator();
|
|
if (lineIterForCaret) {
|
|
// Ancestor of caret
|
|
int32_t addLines = lineIterForCaret->FindLineContaining(caretFrame);
|
|
lineNumber += addLines;
|
|
}
|
|
}
|
|
|
|
caretFrame = parentFrame;
|
|
}
|
|
|
|
NS_NOTREACHED("DOM ancestry had this hypertext but frame ancestry didn't");
|
|
return lineNumber;
|
|
}
|
|
|
|
LayoutDeviceIntRect
|
|
HyperTextAccessible::GetCaretRect(nsIWidget** aWidget)
|
|
{
|
|
*aWidget = nullptr;
|
|
|
|
RefPtr<nsCaret> caret = mDoc->PresShell()->GetCaret();
|
|
NS_ENSURE_TRUE(caret, LayoutDeviceIntRect());
|
|
|
|
bool isVisible = caret->IsVisible();
|
|
if (!isVisible)
|
|
return LayoutDeviceIntRect();
|
|
|
|
nsRect rect;
|
|
nsIFrame* frame = caret->GetGeometry(&rect);
|
|
if (!frame || rect.IsEmpty())
|
|
return LayoutDeviceIntRect();
|
|
|
|
nsPoint offset;
|
|
// Offset from widget origin to the frame origin, which includes chrome
|
|
// on the widget.
|
|
*aWidget = frame->GetNearestWidget(offset);
|
|
NS_ENSURE_TRUE(*aWidget, LayoutDeviceIntRect());
|
|
rect.MoveBy(offset);
|
|
|
|
LayoutDeviceIntRect caretRect = LayoutDeviceIntRect::FromUnknownRect(
|
|
rect.ToOutsidePixels(frame->PresContext()->AppUnitsPerDevPixel()));
|
|
// ((content screen origin) - (content offset in the widget)) = widget origin on the screen
|
|
caretRect.MoveBy((*aWidget)->WidgetToScreenOffset() - (*aWidget)->GetClientOffset());
|
|
|
|
// Correct for character size, so that caret always matches the size of
|
|
// the character. This is important for font size transitions, and is
|
|
// necessary because the Gecko caret uses the previous character's size as
|
|
// the user moves forward in the text by character.
|
|
nsIntRect charRect = CharBounds(CaretOffset(),
|
|
nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE);
|
|
if (!charRect.IsEmpty()) {
|
|
caretRect.height -= charRect.y - caretRect.y;
|
|
caretRect.y = charRect.y;
|
|
}
|
|
return caretRect;
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::GetSelectionDOMRanges(int16_t aType,
|
|
nsTArray<nsRange*>* aRanges)
|
|
{
|
|
// Ignore selection if it is not visible.
|
|
RefPtr<nsFrameSelection> frameSelection = FrameSelection();
|
|
if (!frameSelection ||
|
|
frameSelection->GetDisplaySelection() <= nsISelectionController::SELECTION_HIDDEN)
|
|
return;
|
|
|
|
dom::Selection* domSel = frameSelection->GetSelection(aType);
|
|
if (!domSel)
|
|
return;
|
|
|
|
nsCOMPtr<nsINode> startNode = GetNode();
|
|
|
|
nsCOMPtr<nsIEditor> editor = GetEditor();
|
|
if (editor) {
|
|
nsCOMPtr<nsIDOMElement> editorRoot;
|
|
editor->GetRootElement(getter_AddRefs(editorRoot));
|
|
startNode = do_QueryInterface(editorRoot);
|
|
}
|
|
|
|
if (!startNode)
|
|
return;
|
|
|
|
uint32_t childCount = startNode->GetChildCount();
|
|
nsresult rv = domSel->
|
|
GetRangesForIntervalArray(startNode, 0, startNode, childCount, true, aRanges);
|
|
NS_ENSURE_SUCCESS_VOID(rv);
|
|
|
|
// Remove collapsed ranges
|
|
uint32_t numRanges = aRanges->Length();
|
|
for (uint32_t idx = 0; idx < numRanges; idx ++) {
|
|
if ((*aRanges)[idx]->Collapsed()) {
|
|
aRanges->RemoveElementAt(idx);
|
|
--numRanges;
|
|
--idx;
|
|
}
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
HyperTextAccessible::SelectionCount()
|
|
{
|
|
nsTArray<nsRange*> ranges;
|
|
GetSelectionDOMRanges(nsISelectionController::SELECTION_NORMAL, &ranges);
|
|
return ranges.Length();
|
|
}
|
|
|
|
bool
|
|
HyperTextAccessible::SelectionBoundsAt(int32_t aSelectionNum,
|
|
int32_t* aStartOffset,
|
|
int32_t* aEndOffset)
|
|
{
|
|
*aStartOffset = *aEndOffset = 0;
|
|
|
|
nsTArray<nsRange*> ranges;
|
|
GetSelectionDOMRanges(nsISelectionController::SELECTION_NORMAL, &ranges);
|
|
|
|
uint32_t rangeCount = ranges.Length();
|
|
if (aSelectionNum < 0 || aSelectionNum >= static_cast<int32_t>(rangeCount))
|
|
return false;
|
|
|
|
nsRange* range = ranges[aSelectionNum];
|
|
|
|
// Get start and end points.
|
|
nsINode* startNode = range->GetStartParent();
|
|
nsINode* endNode = range->GetEndParent();
|
|
int32_t startOffset = range->StartOffset(), endOffset = range->EndOffset();
|
|
|
|
// Make sure start is before end, by swapping DOM points. This occurs when
|
|
// the user selects backwards in the text.
|
|
int32_t rangeCompare = nsContentUtils::ComparePoints(endNode, endOffset,
|
|
startNode, startOffset);
|
|
if (rangeCompare < 0) {
|
|
nsINode* tempNode = startNode;
|
|
startNode = endNode;
|
|
endNode = tempNode;
|
|
int32_t tempOffset = startOffset;
|
|
startOffset = endOffset;
|
|
endOffset = tempOffset;
|
|
}
|
|
|
|
if (!nsContentUtils::ContentIsDescendantOf(startNode, mContent))
|
|
*aStartOffset = 0;
|
|
else
|
|
*aStartOffset = DOMPointToOffset(startNode, startOffset);
|
|
|
|
if (!nsContentUtils::ContentIsDescendantOf(endNode, mContent))
|
|
*aEndOffset = CharacterCount();
|
|
else
|
|
*aEndOffset = DOMPointToOffset(endNode, endOffset, true);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
HyperTextAccessible::SetSelectionBoundsAt(int32_t aSelectionNum,
|
|
int32_t aStartOffset,
|
|
int32_t aEndOffset)
|
|
{
|
|
index_t startOffset = ConvertMagicOffset(aStartOffset);
|
|
index_t endOffset = ConvertMagicOffset(aEndOffset);
|
|
if (!startOffset.IsValid() || !endOffset.IsValid() ||
|
|
startOffset > endOffset || endOffset > CharacterCount()) {
|
|
NS_ERROR("Wrong in offset");
|
|
return false;
|
|
}
|
|
|
|
dom::Selection* domSel = DOMSelection();
|
|
if (!domSel)
|
|
return false;
|
|
|
|
RefPtr<nsRange> range;
|
|
uint32_t rangeCount = domSel->RangeCount();
|
|
if (aSelectionNum == static_cast<int32_t>(rangeCount))
|
|
range = new nsRange(mContent);
|
|
else
|
|
range = domSel->GetRangeAt(aSelectionNum);
|
|
|
|
if (!range)
|
|
return false;
|
|
|
|
if (!OffsetsToDOMRange(startOffset, endOffset, range))
|
|
return false;
|
|
|
|
// If new range was created then add it, otherwise notify selection listeners
|
|
// that existing selection range was changed.
|
|
if (aSelectionNum == static_cast<int32_t>(rangeCount))
|
|
return NS_SUCCEEDED(domSel->AddRange(range));
|
|
|
|
domSel->RemoveRange(range);
|
|
return NS_SUCCEEDED(domSel->AddRange(range));
|
|
}
|
|
|
|
bool
|
|
HyperTextAccessible::RemoveFromSelection(int32_t aSelectionNum)
|
|
{
|
|
dom::Selection* domSel = DOMSelection();
|
|
if (!domSel)
|
|
return false;
|
|
|
|
if (aSelectionNum < 0 || aSelectionNum >= static_cast<int32_t>(domSel->RangeCount()))
|
|
return false;
|
|
|
|
domSel->RemoveRange(domSel->GetRangeAt(aSelectionNum));
|
|
return true;
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::ScrollSubstringTo(int32_t aStartOffset, int32_t aEndOffset,
|
|
uint32_t aScrollType)
|
|
{
|
|
RefPtr<nsRange> range = new nsRange(mContent);
|
|
if (OffsetsToDOMRange(aStartOffset, aEndOffset, range))
|
|
nsCoreUtils::ScrollSubstringTo(GetFrame(), range, aScrollType);
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::ScrollSubstringToPoint(int32_t aStartOffset,
|
|
int32_t aEndOffset,
|
|
uint32_t aCoordinateType,
|
|
int32_t aX, int32_t aY)
|
|
{
|
|
nsIFrame *frame = GetFrame();
|
|
if (!frame)
|
|
return;
|
|
|
|
nsIntPoint coords = nsAccUtils::ConvertToScreenCoords(aX, aY, aCoordinateType,
|
|
this);
|
|
|
|
RefPtr<nsRange> range = new nsRange(mContent);
|
|
if (!OffsetsToDOMRange(aStartOffset, aEndOffset, range))
|
|
return;
|
|
|
|
nsPresContext* presContext = frame->PresContext();
|
|
nsPoint coordsInAppUnits =
|
|
ToAppUnits(coords, presContext->AppUnitsPerDevPixel());
|
|
|
|
bool initialScrolled = false;
|
|
nsIFrame *parentFrame = frame;
|
|
while ((parentFrame = parentFrame->GetParent())) {
|
|
nsIScrollableFrame *scrollableFrame = do_QueryFrame(parentFrame);
|
|
if (scrollableFrame) {
|
|
if (!initialScrolled) {
|
|
// Scroll substring to the given point. Turn the point into percents
|
|
// relative scrollable area to use nsCoreUtils::ScrollSubstringTo.
|
|
nsRect frameRect = parentFrame->GetScreenRectInAppUnits();
|
|
nscoord offsetPointX = coordsInAppUnits.x - frameRect.x;
|
|
nscoord offsetPointY = coordsInAppUnits.y - frameRect.y;
|
|
|
|
nsSize size(parentFrame->GetSize());
|
|
|
|
// avoid divide by zero
|
|
size.width = size.width ? size.width : 1;
|
|
size.height = size.height ? size.height : 1;
|
|
|
|
int16_t hPercent = offsetPointX * 100 / size.width;
|
|
int16_t vPercent = offsetPointY * 100 / size.height;
|
|
|
|
nsresult rv = nsCoreUtils::ScrollSubstringTo(frame, range,
|
|
nsIPresShell::ScrollAxis(vPercent),
|
|
nsIPresShell::ScrollAxis(hPercent));
|
|
if (NS_FAILED(rv))
|
|
return;
|
|
|
|
initialScrolled = true;
|
|
} else {
|
|
// Substring was scrolled to the given point already inside its closest
|
|
// scrollable area. If there are nested scrollable areas then make
|
|
// sure we scroll lower areas to the given point inside currently
|
|
// traversed scrollable area.
|
|
nsCoreUtils::ScrollFrameToPoint(parentFrame, frame, coords);
|
|
}
|
|
}
|
|
frame = parentFrame;
|
|
}
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::EnclosingRange(a11y::TextRange& aRange) const
|
|
{
|
|
if (IsTextField()) {
|
|
aRange.Set(mDoc, const_cast<HyperTextAccessible*>(this), 0,
|
|
const_cast<HyperTextAccessible*>(this), CharacterCount());
|
|
} else {
|
|
aRange.Set(mDoc, mDoc, 0, mDoc, mDoc->CharacterCount());
|
|
}
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::SelectionRanges(nsTArray<a11y::TextRange>* aRanges) const
|
|
{
|
|
NS_ASSERTION(aRanges->Length() != 0, "TextRange array supposed to be empty");
|
|
|
|
dom::Selection* sel = DOMSelection();
|
|
if (!sel)
|
|
return;
|
|
|
|
aRanges->SetCapacity(sel->RangeCount());
|
|
|
|
for (uint32_t idx = 0; idx < sel->RangeCount(); idx++) {
|
|
nsRange* DOMRange = sel->GetRangeAt(idx);
|
|
HyperTextAccessible* startParent =
|
|
nsAccUtils::GetTextContainer(DOMRange->GetStartParent());
|
|
HyperTextAccessible* endParent =
|
|
nsAccUtils::GetTextContainer(DOMRange->GetEndParent());
|
|
if (!startParent || !endParent)
|
|
continue;
|
|
|
|
int32_t startOffset =
|
|
startParent->DOMPointToOffset(DOMRange->GetStartParent(),
|
|
DOMRange->StartOffset(), false);
|
|
int32_t endOffset =
|
|
endParent->DOMPointToOffset(DOMRange->GetEndParent(),
|
|
DOMRange->EndOffset(), true);
|
|
|
|
TextRange tr(IsTextField() ? const_cast<HyperTextAccessible*>(this) : mDoc,
|
|
startParent, startOffset, endParent, endOffset);
|
|
*(aRanges->AppendElement()) = Move(tr);
|
|
}
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::VisibleRanges(nsTArray<a11y::TextRange>* aRanges) const
|
|
{
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::RangeByChild(Accessible* aChild,
|
|
a11y::TextRange& aRange) const
|
|
{
|
|
HyperTextAccessible* ht = aChild->AsHyperText();
|
|
if (ht) {
|
|
aRange.Set(mDoc, ht, 0, ht, ht->CharacterCount());
|
|
return;
|
|
}
|
|
|
|
Accessible* child = aChild;
|
|
Accessible* parent = nullptr;
|
|
while ((parent = child->Parent()) && !(ht = parent->AsHyperText()))
|
|
child = parent;
|
|
|
|
// If no text then return collapsed text range, otherwise return a range
|
|
// containing the text enclosed by the given child.
|
|
if (ht) {
|
|
int32_t childIdx = child->IndexInParent();
|
|
int32_t startOffset = ht->GetChildOffset(childIdx);
|
|
int32_t endOffset = child->IsTextLeaf() ?
|
|
ht->GetChildOffset(childIdx + 1) : startOffset;
|
|
aRange.Set(mDoc, ht, startOffset, ht, endOffset);
|
|
}
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::RangeAtPoint(int32_t aX, int32_t aY,
|
|
a11y::TextRange& aRange) const
|
|
{
|
|
Accessible* child = mDoc->ChildAtPoint(aX, aY, eDeepestChild);
|
|
if (!child)
|
|
return;
|
|
|
|
Accessible* parent = nullptr;
|
|
while ((parent = child->Parent()) && !parent->IsHyperText())
|
|
child = parent;
|
|
|
|
// Return collapsed text range for the point.
|
|
if (parent) {
|
|
HyperTextAccessible* ht = parent->AsHyperText();
|
|
int32_t offset = ht->GetChildOffset(child);
|
|
aRange.Set(mDoc, ht, offset, ht, offset);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// Accessible public
|
|
|
|
// Accessible protected
|
|
ENameValueFlag
|
|
HyperTextAccessible::NativeName(nsString& aName)
|
|
{
|
|
// Check @alt attribute for invalid img elements.
|
|
bool hasImgAlt = false;
|
|
if (mContent->IsHTMLElement(nsGkAtoms::img)) {
|
|
hasImgAlt = mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aName);
|
|
if (!aName.IsEmpty())
|
|
return eNameOK;
|
|
}
|
|
|
|
ENameValueFlag nameFlag = AccessibleWrap::NativeName(aName);
|
|
if (!aName.IsEmpty())
|
|
return nameFlag;
|
|
|
|
// Get name from title attribute for HTML abbr and acronym elements making it
|
|
// a valid name from markup. Otherwise their name isn't picked up by recursive
|
|
// name computation algorithm. See NS_OK_NAME_FROM_TOOLTIP.
|
|
if (IsAbbreviation() &&
|
|
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::title, aName))
|
|
aName.CompressWhitespace();
|
|
|
|
return hasImgAlt ? eNoNameOnPurpose : eNameOK;
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::InvalidateChildren()
|
|
{
|
|
mOffsets.Clear();
|
|
|
|
AccessibleWrap::InvalidateChildren();
|
|
}
|
|
|
|
bool
|
|
HyperTextAccessible::RemoveChild(Accessible* aAccessible)
|
|
{
|
|
int32_t childIndex = aAccessible->IndexInParent();
|
|
int32_t count = mOffsets.Length() - childIndex;
|
|
if (count > 0)
|
|
mOffsets.RemoveElementsAt(childIndex, count);
|
|
|
|
return Accessible::RemoveChild(aAccessible);
|
|
}
|
|
|
|
Relation
|
|
HyperTextAccessible::RelationByType(RelationType aType)
|
|
{
|
|
Relation rel = Accessible::RelationByType(aType);
|
|
|
|
switch (aType) {
|
|
case RelationType::NODE_CHILD_OF:
|
|
if (HasOwnContent() && mContent->IsMathMLElement()) {
|
|
Accessible* parent = Parent();
|
|
if (parent) {
|
|
nsIContent* parentContent = parent->GetContent();
|
|
if (parentContent &&
|
|
parentContent->IsMathMLElement(nsGkAtoms::mroot_)) {
|
|
// Add a relation pointing to the parent <mroot>.
|
|
rel.AppendTarget(parent);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case RelationType::NODE_PARENT_OF:
|
|
if (HasOwnContent() && mContent->IsMathMLElement(nsGkAtoms::mroot_)) {
|
|
Accessible* base = GetChildAt(0);
|
|
Accessible* index = GetChildAt(1);
|
|
if (base && index) {
|
|
// Append the <mroot> children in the order index, base.
|
|
rel.AppendTarget(index);
|
|
rel.AppendTarget(base);
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return rel;
|
|
}
|
|
|
|
void
|
|
HyperTextAccessible::CacheChildren()
|
|
{
|
|
// Trailing HTML br element don't play any difference. We don't need to expose
|
|
// it to AT (see bug https://bugzilla.mozilla.org/show_bug.cgi?id=899433#c16
|
|
// for details).
|
|
|
|
TreeWalker walker(this, mContent);
|
|
Accessible* child = nullptr;
|
|
Accessible* lastChild = nullptr;
|
|
while ((child = walker.NextChild())) {
|
|
if (lastChild)
|
|
AppendChild(lastChild);
|
|
|
|
lastChild = child;
|
|
}
|
|
|
|
if (lastChild) {
|
|
if (lastChild->IsHTMLBr())
|
|
Document()->UnbindFromDocument(lastChild);
|
|
else
|
|
AppendChild(lastChild);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// HyperTextAccessible public static
|
|
|
|
nsresult
|
|
HyperTextAccessible::ContentToRenderedOffset(nsIFrame* aFrame, int32_t aContentOffset,
|
|
uint32_t* aRenderedOffset) const
|
|
{
|
|
if (!aFrame) {
|
|
// Current frame not rendered -- this can happen if text is set on
|
|
// something with display: none
|
|
*aRenderedOffset = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (IsTextField()) {
|
|
*aRenderedOffset = aContentOffset;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_ASSERTION(aFrame->GetType() == nsGkAtoms::textFrame,
|
|
"Need text frame for offset conversion");
|
|
NS_ASSERTION(aFrame->GetPrevContinuation() == nullptr,
|
|
"Call on primary frame only");
|
|
|
|
nsIFrame::RenderedText text = aFrame->GetRenderedText(aContentOffset,
|
|
aContentOffset + 1, nsIFrame::TextOffsetType::OFFSETS_IN_CONTENT_TEXT,
|
|
nsIFrame::TrailingWhitespace::DONT_TRIM_TRAILING_WHITESPACE);
|
|
*aRenderedOffset = text.mOffsetWithinNodeRenderedText;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
HyperTextAccessible::RenderedToContentOffset(nsIFrame* aFrame, uint32_t aRenderedOffset,
|
|
int32_t* aContentOffset) const
|
|
{
|
|
if (IsTextField()) {
|
|
*aContentOffset = aRenderedOffset;
|
|
return NS_OK;
|
|
}
|
|
|
|
*aContentOffset = 0;
|
|
NS_ENSURE_TRUE(aFrame, NS_ERROR_FAILURE);
|
|
|
|
NS_ASSERTION(aFrame->GetType() == nsGkAtoms::textFrame,
|
|
"Need text frame for offset conversion");
|
|
NS_ASSERTION(aFrame->GetPrevContinuation() == nullptr,
|
|
"Call on primary frame only");
|
|
|
|
nsIFrame::RenderedText text = aFrame->GetRenderedText(aRenderedOffset,
|
|
aRenderedOffset + 1, nsIFrame::TextOffsetType::OFFSETS_IN_RENDERED_TEXT,
|
|
nsIFrame::TrailingWhitespace::DONT_TRIM_TRAILING_WHITESPACE);
|
|
*aContentOffset = text.mOffsetWithinNodeText;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// HyperTextAccessible public
|
|
|
|
int32_t
|
|
HyperTextAccessible::GetChildOffset(uint32_t aChildIndex,
|
|
bool aInvalidateAfter) const
|
|
{
|
|
if (aChildIndex == 0) {
|
|
if (aInvalidateAfter)
|
|
mOffsets.Clear();
|
|
|
|
return aChildIndex;
|
|
}
|
|
|
|
int32_t count = mOffsets.Length() - aChildIndex;
|
|
if (count > 0) {
|
|
if (aInvalidateAfter)
|
|
mOffsets.RemoveElementsAt(aChildIndex, count);
|
|
|
|
return mOffsets[aChildIndex - 1];
|
|
}
|
|
|
|
uint32_t lastOffset = mOffsets.IsEmpty() ?
|
|
0 : mOffsets[mOffsets.Length() - 1];
|
|
|
|
while (mOffsets.Length() < aChildIndex) {
|
|
Accessible* child = mChildren[mOffsets.Length()];
|
|
lastOffset += nsAccUtils::TextLength(child);
|
|
mOffsets.AppendElement(lastOffset);
|
|
}
|
|
|
|
return mOffsets[aChildIndex - 1];
|
|
}
|
|
|
|
int32_t
|
|
HyperTextAccessible::GetChildIndexAtOffset(uint32_t aOffset) const
|
|
{
|
|
uint32_t lastOffset = 0;
|
|
const uint32_t offsetCount = mOffsets.Length();
|
|
|
|
if (offsetCount > 0) {
|
|
lastOffset = mOffsets[offsetCount - 1];
|
|
if (aOffset < lastOffset) {
|
|
size_t index;
|
|
if (BinarySearch(mOffsets, 0, offsetCount, aOffset, &index)) {
|
|
return (index < (offsetCount - 1)) ? index + 1 : index;
|
|
}
|
|
|
|
return (index == offsetCount) ? -1 : index;
|
|
}
|
|
}
|
|
|
|
uint32_t childCount = ChildCount();
|
|
while (mOffsets.Length() < childCount) {
|
|
Accessible* child = GetChildAt(mOffsets.Length());
|
|
lastOffset += nsAccUtils::TextLength(child);
|
|
mOffsets.AppendElement(lastOffset);
|
|
if (aOffset < lastOffset)
|
|
return mOffsets.Length() - 1;
|
|
}
|
|
|
|
if (aOffset == lastOffset)
|
|
return mOffsets.Length() - 1;
|
|
|
|
return -1;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// HyperTextAccessible protected
|
|
|
|
nsresult
|
|
HyperTextAccessible::GetDOMPointByFrameOffset(nsIFrame* aFrame, int32_t aOffset,
|
|
Accessible* aAccessible,
|
|
DOMPoint* aPoint)
|
|
{
|
|
NS_ENSURE_ARG(aAccessible);
|
|
|
|
if (!aFrame) {
|
|
// If the given frame is null then set offset after the DOM node of the
|
|
// given accessible.
|
|
NS_ASSERTION(!aAccessible->IsDoc(),
|
|
"Shouldn't be called on document accessible!");
|
|
|
|
nsIContent* content = aAccessible->GetContent();
|
|
NS_ASSERTION(content, "Shouldn't operate on defunct accessible!");
|
|
|
|
nsIContent* parent = content->GetParent();
|
|
|
|
aPoint->idx = parent->IndexOf(content) + 1;
|
|
aPoint->node = parent;
|
|
|
|
} else if (aFrame->GetType() == nsGkAtoms::textFrame) {
|
|
nsIContent* content = aFrame->GetContent();
|
|
NS_ENSURE_STATE(content);
|
|
|
|
nsIFrame *primaryFrame = content->GetPrimaryFrame();
|
|
nsresult rv = RenderedToContentOffset(primaryFrame, aOffset, &(aPoint->idx));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
aPoint->node = content;
|
|
|
|
} else {
|
|
nsIContent* content = aFrame->GetContent();
|
|
NS_ENSURE_STATE(content);
|
|
|
|
nsIContent* parent = content->GetParent();
|
|
NS_ENSURE_STATE(parent);
|
|
|
|
aPoint->idx = parent->IndexOf(content);
|
|
aPoint->node = parent;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// HyperTextAccessible
|
|
void
|
|
HyperTextAccessible::GetSpellTextAttr(nsINode* aNode,
|
|
int32_t aNodeOffset,
|
|
uint32_t* aStartOffset,
|
|
uint32_t* aEndOffset,
|
|
nsIPersistentProperties* aAttributes)
|
|
{
|
|
RefPtr<nsFrameSelection> fs = FrameSelection();
|
|
if (!fs)
|
|
return;
|
|
|
|
dom::Selection* domSel = fs->GetSelection(nsISelectionController::SELECTION_SPELLCHECK);
|
|
if (!domSel)
|
|
return;
|
|
|
|
int32_t rangeCount = domSel->RangeCount();
|
|
if (rangeCount <= 0)
|
|
return;
|
|
|
|
uint32_t startOffset = 0, endOffset = 0;
|
|
for (int32_t idx = 0; idx < rangeCount; idx++) {
|
|
nsRange* range = domSel->GetRangeAt(idx);
|
|
if (range->Collapsed())
|
|
continue;
|
|
|
|
// See if the point comes after the range in which case we must continue in
|
|
// case there is another range after this one.
|
|
nsINode* endNode = range->GetEndParent();
|
|
int32_t endNodeOffset = range->EndOffset();
|
|
if (nsContentUtils::ComparePoints(aNode, aNodeOffset,
|
|
endNode, endNodeOffset) >= 0)
|
|
continue;
|
|
|
|
// At this point our point is either in this range or before it but after
|
|
// the previous range. So we check to see if the range starts before the
|
|
// point in which case the point is in the missspelled range, otherwise it
|
|
// must be before the range and after the previous one if any.
|
|
nsINode* startNode = range->GetStartParent();
|
|
int32_t startNodeOffset = range->StartOffset();
|
|
if (nsContentUtils::ComparePoints(startNode, startNodeOffset, aNode,
|
|
aNodeOffset) <= 0) {
|
|
startOffset = DOMPointToOffset(startNode, startNodeOffset);
|
|
|
|
endOffset = DOMPointToOffset(endNode, endNodeOffset);
|
|
|
|
if (startOffset > *aStartOffset)
|
|
*aStartOffset = startOffset;
|
|
|
|
if (endOffset < *aEndOffset)
|
|
*aEndOffset = endOffset;
|
|
|
|
if (aAttributes) {
|
|
nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::invalid,
|
|
NS_LITERAL_STRING("spelling"));
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
// This range came after the point.
|
|
endOffset = DOMPointToOffset(startNode, startNodeOffset);
|
|
|
|
if (idx > 0) {
|
|
nsRange* prevRange = domSel->GetRangeAt(idx - 1);
|
|
startOffset = DOMPointToOffset(prevRange->GetEndParent(),
|
|
prevRange->EndOffset());
|
|
}
|
|
|
|
if (startOffset > *aStartOffset)
|
|
*aStartOffset = startOffset;
|
|
|
|
if (endOffset < *aEndOffset)
|
|
*aEndOffset = endOffset;
|
|
|
|
return;
|
|
}
|
|
|
|
// We never found a range that ended after the point, therefore we know that
|
|
// the point is not in a range, that we do not need to compute an end offset,
|
|
// and that we should use the end offset of the last range to compute the
|
|
// start offset of the text attribute range.
|
|
nsRange* prevRange = domSel->GetRangeAt(rangeCount - 1);
|
|
startOffset = DOMPointToOffset(prevRange->GetEndParent(),
|
|
prevRange->EndOffset());
|
|
|
|
if (startOffset > *aStartOffset)
|
|
*aStartOffset = startOffset;
|
|
}
|
|
|
|
bool
|
|
HyperTextAccessible::IsTextRole()
|
|
{
|
|
if (mRoleMapEntry &&
|
|
(mRoleMapEntry->role == roles::GRAPHIC ||
|
|
mRoleMapEntry->role == roles::IMAGE_MAP ||
|
|
mRoleMapEntry->role == roles::SLIDER ||
|
|
mRoleMapEntry->role == roles::PROGRESSBAR ||
|
|
mRoleMapEntry->role == roles::SEPARATOR))
|
|
return false;
|
|
|
|
return true;
|
|
}
|