1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/accessible/src/base/SelectionManager.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,222 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "mozilla/a11y/SelectionManager.h"
1.10 +
1.11 +#include "DocAccessible-inl.h"
1.12 +#include "nsAccessibilityService.h"
1.13 +#include "nsAccUtils.h"
1.14 +#include "nsCoreUtils.h"
1.15 +#include "nsEventShell.h"
1.16 +
1.17 +#include "nsIAccessibleTypes.h"
1.18 +#include "nsIDOMDocument.h"
1.19 +#include "nsIPresShell.h"
1.20 +#include "mozilla/dom/Selection.h"
1.21 +#include "mozilla/dom/Element.h"
1.22 +
1.23 +using namespace mozilla;
1.24 +using namespace mozilla::a11y;
1.25 +using mozilla::dom::Selection;
1.26 +
1.27 +struct mozilla::a11y::SelData MOZ_FINAL
1.28 +{
1.29 + SelData(Selection* aSel, int32_t aReason) :
1.30 + mSel(aSel), mReason(aReason) {}
1.31 +
1.32 + nsRefPtr<Selection> mSel;
1.33 + int16_t mReason;
1.34 +
1.35 + NS_INLINE_DECL_REFCOUNTING(SelData)
1.36 +
1.37 +private:
1.38 + // Private destructor, to discourage deletion outside of Release():
1.39 + ~SelData() {}
1.40 +};
1.41 +
1.42 +void
1.43 +SelectionManager::ClearControlSelectionListener()
1.44 +{
1.45 + if (!mCurrCtrlFrame)
1.46 + return;
1.47 +
1.48 + const nsFrameSelection* frameSel = mCurrCtrlFrame->GetConstFrameSelection();
1.49 + NS_ASSERTION(frameSel, "No frame selection for the element!");
1.50 +
1.51 + mCurrCtrlFrame = nullptr;
1.52 + if (!frameSel)
1.53 + return;
1.54 +
1.55 + // Remove 'this' registered as selection listener for the normal selection.
1.56 + Selection* normalSel =
1.57 + frameSel->GetSelection(nsISelectionController::SELECTION_NORMAL);
1.58 + normalSel->RemoveSelectionListener(this);
1.59 +
1.60 + // Remove 'this' registered as selection listener for the spellcheck
1.61 + // selection.
1.62 + Selection* spellSel =
1.63 + frameSel->GetSelection(nsISelectionController::SELECTION_SPELLCHECK);
1.64 + spellSel->RemoveSelectionListener(this);
1.65 +}
1.66 +
1.67 +void
1.68 +SelectionManager::SetControlSelectionListener(dom::Element* aFocusedElm)
1.69 +{
1.70 + // When focus moves such that the caret is part of a new frame selection
1.71 + // this removes the old selection listener and attaches a new one for
1.72 + // the current focus.
1.73 + ClearControlSelectionListener();
1.74 +
1.75 + mCurrCtrlFrame = aFocusedElm->GetPrimaryFrame();
1.76 + if (!mCurrCtrlFrame)
1.77 + return;
1.78 +
1.79 + const nsFrameSelection* frameSel = mCurrCtrlFrame->GetConstFrameSelection();
1.80 + NS_ASSERTION(frameSel, "No frame selection for focused element!");
1.81 + if (!frameSel)
1.82 + return;
1.83 +
1.84 + // Register 'this' as selection listener for the normal selection.
1.85 + Selection* normalSel =
1.86 + frameSel->GetSelection(nsISelectionController::SELECTION_NORMAL);
1.87 + normalSel->AddSelectionListener(this);
1.88 +
1.89 + // Register 'this' as selection listener for the spell check selection.
1.90 + Selection* spellSel =
1.91 + frameSel->GetSelection(nsISelectionController::SELECTION_SPELLCHECK);
1.92 + spellSel->AddSelectionListener(this);
1.93 +}
1.94 +
1.95 +void
1.96 +SelectionManager::AddDocSelectionListener(nsIPresShell* aPresShell)
1.97 +{
1.98 + const nsFrameSelection* frameSel = aPresShell->ConstFrameSelection();
1.99 +
1.100 + // Register 'this' as selection listener for the normal selection.
1.101 + Selection* normalSel =
1.102 + frameSel->GetSelection(nsISelectionController::SELECTION_NORMAL);
1.103 + normalSel->AddSelectionListener(this);
1.104 +
1.105 + // Register 'this' as selection listener for the spell check selection.
1.106 + Selection* spellSel =
1.107 + frameSel->GetSelection(nsISelectionController::SELECTION_SPELLCHECK);
1.108 + spellSel->AddSelectionListener(this);
1.109 +}
1.110 +
1.111 +void
1.112 +SelectionManager::RemoveDocSelectionListener(nsIPresShell* aPresShell)
1.113 +{
1.114 + const nsFrameSelection* frameSel = aPresShell->ConstFrameSelection();
1.115 +
1.116 + // Remove 'this' registered as selection listener for the normal selection.
1.117 + Selection* normalSel =
1.118 + frameSel->GetSelection(nsISelectionController::SELECTION_NORMAL);
1.119 + normalSel->RemoveSelectionListener(this);
1.120 +
1.121 + // Remove 'this' registered as selection listener for the spellcheck
1.122 + // selection.
1.123 + Selection* spellSel =
1.124 + frameSel->GetSelection(nsISelectionController::SELECTION_SPELLCHECK);
1.125 + spellSel->RemoveSelectionListener(this);
1.126 +}
1.127 +
1.128 +void
1.129 +SelectionManager::ProcessTextSelChangeEvent(AccEvent* aEvent)
1.130 +{
1.131 + // Fire selection change event if it's not pure caret-move selection change,
1.132 + // i.e. the accessible has or had not collapsed selection.
1.133 + AccTextSelChangeEvent* event = downcast_accEvent(aEvent);
1.134 + if (!event->IsCaretMoveOnly())
1.135 + nsEventShell::FireEvent(aEvent);
1.136 +
1.137 + // Fire caret move event if there's a caret in the selection.
1.138 + nsINode* caretCntrNode =
1.139 + nsCoreUtils::GetDOMNodeFromDOMPoint(event->mSel->GetFocusNode(),
1.140 + event->mSel->FocusOffset());
1.141 + if (!caretCntrNode)
1.142 + return;
1.143 +
1.144 + HyperTextAccessible* caretCntr = nsAccUtils::GetTextContainer(caretCntrNode);
1.145 + NS_ASSERTION(caretCntr,
1.146 + "No text container for focus while there's one for common ancestor?!");
1.147 + if (!caretCntr)
1.148 + return;
1.149 +
1.150 + int32_t caretOffset = caretCntr->CaretOffset();
1.151 + if (caretOffset != -1) {
1.152 + nsRefPtr<AccCaretMoveEvent> caretMoveEvent =
1.153 + new AccCaretMoveEvent(caretCntr, caretOffset, aEvent->FromUserInput());
1.154 + nsEventShell::FireEvent(caretMoveEvent);
1.155 + }
1.156 +}
1.157 +
1.158 +NS_IMETHODIMP
1.159 +SelectionManager::NotifySelectionChanged(nsIDOMDocument* aDOMDocument,
1.160 + nsISelection* aSelection,
1.161 + int16_t aReason)
1.162 +{
1.163 + NS_ENSURE_ARG(aDOMDocument);
1.164 +
1.165 + nsCOMPtr<nsIDocument> documentNode(do_QueryInterface(aDOMDocument));
1.166 + DocAccessible* document = GetAccService()->GetDocAccessible(documentNode);
1.167 +
1.168 +#ifdef A11Y_LOG
1.169 + if (logging::IsEnabled(logging::eSelection))
1.170 + logging::SelChange(aSelection, document, aReason);
1.171 +#endif
1.172 +
1.173 + // Don't fire events until document is loaded.
1.174 + if (document && document->IsContentLoaded()) {
1.175 + // Selection manager has longer lifetime than any document accessible,
1.176 + // so that we are guaranteed that the notification is processed before
1.177 + // the selection manager is destroyed.
1.178 + nsRefPtr<SelData> selData =
1.179 + new SelData(static_cast<Selection*>(aSelection), aReason);
1.180 + document->HandleNotification<SelectionManager, SelData>
1.181 + (this, &SelectionManager::ProcessSelectionChanged, selData);
1.182 + }
1.183 +
1.184 + return NS_OK;
1.185 +}
1.186 +
1.187 +void
1.188 +SelectionManager::ProcessSelectionChanged(SelData* aSelData)
1.189 +{
1.190 + Selection* selection = aSelData->mSel;
1.191 + if (!selection->GetPresShell())
1.192 + return;
1.193 +
1.194 + const nsRange* range = selection->GetAnchorFocusRange();
1.195 + nsINode* cntrNode = nullptr;
1.196 + if (range)
1.197 + cntrNode = range->GetCommonAncestor();
1.198 +
1.199 + if (!cntrNode) {
1.200 + cntrNode = selection->GetFrameSelection()->GetAncestorLimiter();
1.201 + if (!cntrNode) {
1.202 + cntrNode = selection->GetPresShell()->GetDocument();
1.203 + NS_ASSERTION(aSelData->mSel->GetPresShell()->ConstFrameSelection() == selection->GetFrameSelection(),
1.204 + "Wrong selection container was used!");
1.205 + }
1.206 + }
1.207 +
1.208 + HyperTextAccessible* text = nsAccUtils::GetTextContainer(cntrNode);
1.209 + if (!text) {
1.210 + NS_NOTREACHED("We must reach document accessible implementing text interface!");
1.211 + return;
1.212 + }
1.213 +
1.214 + if (selection->GetType() == nsISelectionController::SELECTION_NORMAL) {
1.215 + nsRefPtr<AccEvent> event =
1.216 + new AccTextSelChangeEvent(text, selection, aSelData->mReason);
1.217 + text->Document()->FireDelayedEvent(event);
1.218 +
1.219 + } else if (selection->GetType() == nsISelectionController::SELECTION_SPELLCHECK) {
1.220 + // XXX: fire an event for container accessible of the focus/anchor range
1.221 + // of the spelcheck selection.
1.222 + text->Document()->FireDelayedEvent(nsIAccessibleEvent::EVENT_TEXT_ATTRIBUTE_CHANGED,
1.223 + text);
1.224 + }
1.225 +}
