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| -rw-r--r-- | accessibility/inc/extended/textwindowaccessibility.hxx | 600 |
1 files changed, 600 insertions, 0 deletions
diff --git a/accessibility/inc/extended/textwindowaccessibility.hxx b/accessibility/inc/extended/textwindowaccessibility.hxx new file mode 100644 index 000000000..f5696d8bf --- /dev/null +++ b/accessibility/inc/extended/textwindowaccessibility.hxx @@ -0,0 +1,600 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#pragma once + +#include <toolkit/awt/vclxaccessiblecomponent.hxx> +#include <svl/lstner.hxx> +#include <vcl/textdata.hxx> +#include <vcl/texteng.hxx> +#include <vcl/textview.hxx> +#include <vcl/window.hxx> +#include <com/sun/star/uno/Reference.hxx> +#include <com/sun/star/accessibility/AccessibleScrollType.hpp> +#include <com/sun/star/accessibility/XAccessible.hpp> +#include <com/sun/star/accessibility/XAccessibleContext.hpp> +#include <com/sun/star/accessibility/XAccessibleEditableText.hpp> +#include <com/sun/star/accessibility/XAccessibleMultiLineText.hpp> +#include <com/sun/star/accessibility/XAccessibleTextAttributes.hpp> +#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp> +#include <com/sun/star/accessibility/XAccessibleComponent.hpp> +#include <toolkit/awt/vclxwindow.hxx> +#include <cppuhelper/basemutex.hxx> +#include <cppuhelper/compbase7.hxx> +#include <comphelper/accessibletexthelper.hxx> +#include <rtl/ref.hxx> + +#include <unotools/accessiblerelationsethelper.hxx> +#include <queue> +#include <memory> +#include <unordered_map> + +class TextEngine; +class TextView; + +namespace accessibility +{ + +class Document; + +class SfxListenerGuard +{ +public: + SfxListenerGuard(::SfxListener & rListener): + m_rListener(rListener), m_pNotifier(nullptr) {} + + ~SfxListenerGuard() { endListening(); } + + // Not thread safe: + void startListening(::SfxBroadcaster & rNotifier); + + // Not thread safe: + void endListening(); + +private: + ::SfxListener & m_rListener; + ::SfxBroadcaster * m_pNotifier; +}; + +class WindowListenerGuard +{ +public: + WindowListenerGuard(::Link<VclWindowEvent&,void> const & rListener): + m_aListener(rListener), m_pNotifier(nullptr) {} + + ~WindowListenerGuard() { endListening(); } + + // Not thread safe: + void startListening(vcl::Window & rNotifier); + + // Not thread safe: + void endListening(); + +private: + ::Link<VclWindowEvent&,void> m_aListener; + VclPtr<vcl::Window> m_pNotifier; +}; + +class ParagraphInfo +{ +public: + ParagraphInfo(::sal_Int32 nHeight): m_nHeight(nHeight) {} + + css::uno::WeakReference< css::accessibility::XAccessible > const & + getParagraph() const { return m_xParagraph; } + + ::sal_Int32 getHeight() const { return m_nHeight; } + + void setParagraph( + css::uno::Reference< css::accessibility::XAccessible > const & + rParagraph) { m_xParagraph = rParagraph; } + + void changeHeight(::sal_Int32 nHeight) { m_nHeight = nHeight; } + +private: + css::uno::WeakReference< css::accessibility::XAccessible > + m_xParagraph; + ::sal_Int32 m_nHeight; +}; + +typedef std::vector< ParagraphInfo > Paragraphs; + +typedef ::cppu::WeakAggComponentImplHelper7< + css::accessibility::XAccessible, + css::accessibility::XAccessibleContext, + css::accessibility::XAccessibleComponent, + css::accessibility::XAccessibleEditableText, + css::accessibility::XAccessibleMultiLineText, + css::accessibility::XAccessibleTextAttributes, + css::accessibility::XAccessibleEventBroadcaster > ParagraphBase; + +// The Paragraph's number is the absolute position within the text engine (from +// 0 to N - 1), whereas the Paragraph's index is the position within the text +// view/accessible parent (from 0 to M - 1). Paragraphs outside the currently +// visible range have an index of -1. +class Paragraph final: + private cppu::BaseMutex, public ParagraphBase, private ::comphelper::OCommonAccessibleText +{ +public: + Paragraph(::rtl::Reference< Document > xDocument, + Paragraphs::size_type nNumber); + + // Not thread-safe. + Paragraphs::size_type getNumber() const { return m_nNumber; } + + // Not thread-safe. + void numberChanged(bool bIncremented); + + // Not thread-safe. + void textChanged(); + + // Thread-safe. + void notifyEvent(::sal_Int16 nEventId, css::uno::Any const & rOldValue, + css::uno::Any const & rNewValue); + +private: + // OCommonAccessibleText + virtual void implGetParagraphBoundary( const OUString& rText, + css::i18n::Boundary& rBoundary, + ::sal_Int32 nIndex ) override; + virtual void implGetLineBoundary( const OUString& rText, + css::i18n::Boundary& rBoundary, + ::sal_Int32 nIndex ) override; + + virtual css::uno::Reference< css::accessibility::XAccessibleContext > + SAL_CALL getAccessibleContext() override; + + virtual ::sal_Int32 SAL_CALL getAccessibleChildCount() override; + + virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL + getAccessibleChild(::sal_Int32 i) override; + + virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL + getAccessibleParent() override; + + virtual ::sal_Int32 SAL_CALL getAccessibleIndexInParent() override; + + virtual ::sal_Int16 SAL_CALL getAccessibleRole() override; + + virtual OUString SAL_CALL getAccessibleDescription() override; + + virtual OUString SAL_CALL getAccessibleName() override; + + virtual + css::uno::Reference< css::accessibility::XAccessibleRelationSet > + SAL_CALL getAccessibleRelationSet() override; + + virtual + css::uno::Reference< css::accessibility::XAccessibleStateSet > SAL_CALL + getAccessibleStateSet() override; + + virtual css::lang::Locale SAL_CALL getLocale() override; + + virtual sal_Bool SAL_CALL containsPoint(css::awt::Point const & rPoint) override; + + virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL + getAccessibleAtPoint(css::awt::Point const & rPoint) override; + + virtual css::awt::Rectangle SAL_CALL getBounds() override; + + virtual css::awt::Point SAL_CALL getLocation() override; + + virtual css::awt::Point SAL_CALL getLocationOnScreen() override; + + virtual css::awt::Size SAL_CALL getSize() override; + + virtual void SAL_CALL grabFocus() override; + + virtual sal_Int32 SAL_CALL getForeground() override; + + virtual sal_Int32 SAL_CALL getBackground() override; + + virtual ::sal_Int32 SAL_CALL getCaretPosition() override; + + virtual sal_Bool SAL_CALL setCaretPosition(::sal_Int32 nIndex) override; + + virtual ::sal_Unicode SAL_CALL getCharacter(::sal_Int32 nIndex) override; + + virtual css::uno::Sequence< css::beans::PropertyValue > SAL_CALL + getCharacterAttributes(::sal_Int32 nIndex, const css::uno::Sequence< OUString >& aRequestedAttributes ) override; + + virtual css::awt::Rectangle SAL_CALL + getCharacterBounds(::sal_Int32 nIndex) override; + + virtual ::sal_Int32 SAL_CALL getCharacterCount() override; + + virtual ::sal_Int32 SAL_CALL + getIndexAtPoint(css::awt::Point const & rPoint) override; + + virtual OUString SAL_CALL getSelectedText() override; + + virtual ::sal_Int32 SAL_CALL getSelectionStart() override; + + virtual ::sal_Int32 SAL_CALL getSelectionEnd() override; + + virtual sal_Bool SAL_CALL setSelection(::sal_Int32 nStartIndex, + ::sal_Int32 nEndIndex) override; + + virtual sal_Bool SAL_CALL scrollSubstringTo( sal_Int32 nStartIndex, sal_Int32 nEndIndex, css::accessibility::AccessibleScrollType aScrollType) override; + + virtual OUString SAL_CALL getText() override; + + virtual OUString SAL_CALL getTextRange(::sal_Int32 nStartIndex, + ::sal_Int32 nEndIndex) override; + + virtual css::accessibility::TextSegment SAL_CALL getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override; + virtual css::accessibility::TextSegment SAL_CALL getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override; + virtual css::accessibility::TextSegment SAL_CALL getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override; + + virtual sal_Bool SAL_CALL copyText(::sal_Int32 nStartIndex, + ::sal_Int32 nEndIndex) override; + + virtual sal_Bool SAL_CALL cutText(::sal_Int32 nStartIndex, + ::sal_Int32 nEndIndex) override; + + virtual sal_Bool SAL_CALL pasteText(::sal_Int32 nIndex) override; + + virtual sal_Bool SAL_CALL deleteText(::sal_Int32 nStartIndex, + ::sal_Int32 nEndIndex) override; + + virtual sal_Bool SAL_CALL insertText(OUString const & rText, + ::sal_Int32 nIndex) override; + + virtual sal_Bool SAL_CALL replaceText( + ::sal_Int32 nStartIndex, ::sal_Int32 nEndIndex, + OUString const & rReplacement) override; + + virtual sal_Bool SAL_CALL setAttributes( + ::sal_Int32 nStartIndex, ::sal_Int32 nEndIndex, + css::uno::Sequence< css::beans::PropertyValue > const & + rAttributeSet) override; + + virtual sal_Bool SAL_CALL setText(OUString const & rText) override; + + virtual css::uno::Sequence< css::beans::PropertyValue > SAL_CALL + getDefaultAttributes(const css::uno::Sequence< OUString >& RequestedAttributes) override; + + virtual css::uno::Sequence< css::beans::PropertyValue > SAL_CALL + getRunAttributes(::sal_Int32 Index, const css::uno::Sequence< OUString >& RequestedAttributes) override; + + virtual ::sal_Int32 SAL_CALL getLineNumberAtIndex( ::sal_Int32 nIndex ) override; + + virtual css::accessibility::TextSegment SAL_CALL getTextAtLineNumber( ::sal_Int32 nLineNo ) override; + + virtual css::accessibility::TextSegment SAL_CALL getTextAtLineWithCaret( ) override; + + virtual ::sal_Int32 SAL_CALL getNumberOfLineWithCaret( ) override; + + virtual void SAL_CALL addAccessibleEventListener( + css::uno::Reference< + css::accessibility::XAccessibleEventListener > const & rListener) override; + + virtual void SAL_CALL removeAccessibleEventListener( + css::uno::Reference< + css::accessibility::XAccessibleEventListener > const & rListener) override; + + virtual void SAL_CALL disposing() override; + + virtual OUString implGetText() override; + + virtual css::lang::Locale implGetLocale() override; + + virtual void implGetSelection(::sal_Int32 & rStartIndex, + ::sal_Int32 & rEndIndex) override; + + // Throws css::lang::DisposedException: + void checkDisposed(); + + ::rtl::Reference< Document > m_xDocument; + Paragraphs::size_type m_nNumber; + + /// client id in the AccessibleEventNotifier queue + sal_uInt32 m_nClientId; + + OUString m_aParagraphText; +}; + + +typedef std::unordered_map< OUString, + css::beans::PropertyValue > tPropValMap; + +class Document final : public ::VCLXAccessibleComponent, public ::SfxListener +{ +public: + Document(::VCLXWindow * pVclXWindow, ::TextEngine & rEngine, + ::TextView & rView); + + const css::uno::Reference< css::accessibility::XAccessible >& + getAccessible() const { return m_xAccessible; } + + // Must be called only after init has been called. + css::lang::Locale retrieveLocale(); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const *" instead of a + // "::rtl::Reference< Paragraph > const &". + ::sal_Int32 retrieveParagraphIndex(Paragraph const * pParagraph); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const *" instead of a + // "::rtl::Reference< Paragraph > const &". + ::sal_Int64 retrieveParagraphState(Paragraph const * pParagraph); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + css::awt::Rectangle + retrieveParagraphBounds(Paragraph const * pParagraph, bool bAbsolute); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + OUString retrieveParagraphText(Paragraph const * pParagraph); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + void retrieveParagraphSelection(Paragraph const * pParagraph, + ::sal_Int32 * pBegin, ::sal_Int32 * pEnd); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const *" instead of a + // "::rtl::Reference< Paragraph > const &". + ::sal_Int32 retrieveParagraphCaretPosition(Paragraph const * pParagraph); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + // Throws css::lang::IndexOutOfBoundsException. + css::awt::Rectangle + retrieveCharacterBounds(Paragraph const * pParagraph, + ::sal_Int32 nIndex); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + ::sal_Int32 retrieveCharacterIndex(Paragraph const * pParagraph, + css::awt::Point const & rPoint); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + // Throws css::lang::IndexOutOfBoundsException. + css::uno::Sequence< css::beans::PropertyValue > retrieveCharacterAttributes( + Paragraph const * pParagraph, ::sal_Int32 nIndex, + const css::uno::Sequence< OUString >& aRequestedAttributes); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + // Throws css::lang::IndexOutOfBoundsException. + css::uno::Sequence< css::beans::PropertyValue > retrieveRunAttributes( + Paragraph const * pParagraph, ::sal_Int32 Index, + const css::uno::Sequence< OUString >& RequestedAttributes); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + void changeParagraphText(Paragraph const * pParagraph, + OUString const & rText); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + // Throws css::lang::IndexOutOfBoundsException. + void changeParagraphText(Paragraph const * pParagraph, ::sal_Int32 nBegin, + ::sal_Int32 nEnd, bool bCut, bool bPaste, + OUString const & rText); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + // Throws css::lang::IndexOutOfBoundsException. + void copyParagraphText(Paragraph const * pParagraph, + ::sal_Int32 nBegin, ::sal_Int32 nEnd); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + // Throws css::lang::IndexOutOfBoundsException. + void changeParagraphAttributes( + Paragraph const * pParagraph, ::sal_Int32 nBegin, ::sal_Int32 nEnd, + css::uno::Sequence< css::beans::PropertyValue > const & + rAttributeSet); + + // Must be called only after init has been called. + // To make it possible for this method to be (indirectly) called from + // within Paragraph's constructor (i.e., when the Paragraph's ref count is + // still zero), pass a "Paragraph const &" instead of a + // "::rtl::Reference< Paragraph > const &". + // Throws css::lang::IndexOutOfBoundsException. + void changeParagraphSelection(Paragraph const * pParagraph, + ::sal_Int32 nBegin, ::sal_Int32 nEnd); + + css::i18n::Boundary + retrieveParagraphLineBoundary( Paragraph const * pParagraph, + ::sal_Int32 nIndex, ::sal_Int32 *pLineNo); + + css::i18n::Boundary + retrieveParagraphBoundaryOfLine( Paragraph const * pParagraph, + ::sal_Int32 nIndex ); + + sal_Int32 retrieveParagraphLineWithCursor( Paragraph const * pParagraph ); + + css::uno::Reference< css::accessibility::XAccessibleRelationSet > + retrieveParagraphRelationSet( Paragraph const * pParagraph ); + +private: + virtual ::sal_Int32 SAL_CALL getAccessibleChildCount() override; + + virtual css::uno::Reference< css::accessibility::XAccessible > + SAL_CALL getAccessibleChild(::sal_Int32 i) override; + + virtual ::sal_Int16 SAL_CALL getAccessibleRole() override; + + virtual css::uno::Reference< css::accessibility::XAccessible > + SAL_CALL getAccessibleAtPoint(css::awt::Point const & rPoint) override; + + virtual void FillAccessibleStateSet( utl::AccessibleStateSetHelper& rStateSet ) override; + virtual void FillAccessibleRelationSet( utl::AccessibleRelationSetHelper& rRelationSet ) override; + + // ??? Will be called with both the external (Solar) and internal mutex + // locked: + virtual void SAL_CALL disposing() override; + + // ??? Will be called with the external (Solar) mutex locked. + // init will already have been called. + virtual void Notify(::SfxBroadcaster & rBC, ::SfxHint const & rHint) override; + + // Assuming that this will only be called with the external (Solar) mutex + // locked. + // init will already have been called. + DECL_LINK(WindowEventHandler, VclWindowEvent&, void); + + // Must be called with both the external (Solar) and internal mutex + // locked. + void init(); + + // Must be called with both the external (Solar) and internal mutex + // locked, and after init has been called: + static ::rtl::Reference< Paragraph > + getParagraph(Paragraphs::iterator const & rIt); + + // Must be called with both the external (Solar) and internal mutex + // locked, and after init has been called. + // Throws css::uno::RuntimeException. + css::uno::Reference< css::accessibility::XAccessible > + getAccessibleChild(Paragraphs::iterator const & rIt); + + // Must be called with both the external (Solar) and internal mutex + // locked, and after init has been called: + void determineVisibleRange(); + + // Must be called with both the external (Solar) and internal mutex + // locked, and after init has been called: + void notifyVisibleRangeChanges( + Paragraphs::iterator const & rOldVisibleBegin, + Paragraphs::iterator const & rOldVisibleEnd, + Paragraphs::iterator const & rInserted); + + // Must be called with both the external (Solar) and internal mutex + // locked, and after init has been called: + void changeParagraphText(::sal_uInt32 nNumber, ::sal_uInt16 nBegin, ::sal_uInt16 nEnd, + bool bCut, bool bPaste, + OUString const & rText); + + void + handleParagraphNotifications(); + + void handleSelectionChangeNotification(); + + void sendEvent(::sal_Int32 start, ::sal_Int32 end, ::sal_Int16 nEventId); + + void disposeParagraphs(); + + static css::uno::Any mapFontColor(::Color const & rColor); + + static ::Color mapFontColor(css::uno::Any const & rColor); + + static css::uno::Any mapFontWeight(::FontWeight nWeight); + + static ::FontWeight mapFontWeight(css::uno::Any const & rWeight); + + void retrieveRunAttributesImpl( + Paragraph const * pParagraph, ::sal_Int32 Index, + const css::uno::Sequence< OUString >& RequestedAttributes, + tPropValMap& rRunAttrSeq); + + css::uno::Reference< css::accessibility::XAccessible > m_xAccessible; + ::TextEngine & m_rEngine; + ::TextView & m_rView; + + SfxListenerGuard m_aEngineListener; + WindowListenerGuard m_aViewListener; + + // All the following members have valid values only after calling init: + + std::unique_ptr< Paragraphs > m_xParagraphs; + + // m_nViewOffset is from the start of the document (0) to the start of the + // current view, and m_nViewHeight is the height of the view: + ::sal_Int32 m_nViewOffset; + ::sal_Int32 m_nViewHeight; + + // m_aVisibleBegin points to the first Paragraph that is (partially) + // contained in the view, and m_aVisibleEnd points past the last Paragraph + // that is (partially) contained. If no Paragraphs are (partially) in the + // view, both m_aVisibleBegin and m_aVisibleEnd are set to + // m_xParagraphs->end(). These values are only changed by + // determineVisibleRange. + Paragraphs::iterator m_aVisibleBegin; + Paragraphs::iterator m_aVisibleEnd; + + // m_nVisibleBeginOffset is from m_nViewOffset back to the start of the + // Paragraph pointed to by m_aVisibleBegin (and always has a non-negative + // value). If m_aVisibleBegin == m_xParagraphs->end(), + // m_nVisibleBeginOffset is set to 0. These values are only changed by + // determineVisibleRange. + ::sal_Int32 m_nVisibleBeginOffset; + + // If no selection has yet been set, all the following four variables are + // set to -1. m_nSelectionLastPara/Pos is also the cursor position. + ::sal_Int32 m_nSelectionFirstPara; + ::sal_Int32 m_nSelectionFirstPos; + ::sal_Int32 m_nSelectionLastPara; + ::sal_Int32 m_nSelectionLastPos; + + Paragraphs::iterator m_aFocused; + + std::queue< ::TextHint > m_aParagraphNotifications; + bool m_bSelectionChangedNotification; +}; + +} + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |