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Diffstat (limited to 'vcl/source/accessibility/AccessibleTextAttributeHelper.cxx')
| -rw-r--r-- | vcl/source/accessibility/AccessibleTextAttributeHelper.cxx | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/vcl/source/accessibility/AccessibleTextAttributeHelper.cxx b/vcl/source/accessibility/AccessibleTextAttributeHelper.cxx new file mode 100644 index 0000000000..5647dc972b --- /dev/null +++ b/vcl/source/accessibility/AccessibleTextAttributeHelper.cxx @@ -0,0 +1,396 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */ +/* + * 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 . + */ + +#include <vcl/accessibility/AccessibleTextAttributeHelper.hxx> + +#include <com/sun/star/accessibility/AccessibleTextType.hpp> +#include <com/sun/star/accessibility/XAccessibleTextMarkup.hpp> +#include <com/sun/star/awt/FontSlant.hpp> +#include <com/sun/star/awt/FontStrikeout.hpp> +#include <com/sun/star/awt/FontUnderline.hpp> +#include <com/sun/star/awt/FontWeight.hpp> +#include <com/sun/star/style/ParagraphAdjust.hpp> +#include <com/sun/star/text/TextMarkupType.hpp> +#include <o3tl/any.hxx> +#include <tools/color.hxx> + +namespace +{ +OUString lcl_ConvertCharEscapement(sal_Int16 nEscapement) +{ + if (nEscapement > 0) + return "super"; + if (nEscapement < 0) + return "sub"; + + return "baseline"; +} + +OUString lcl_ConverCharStrikeout(sal_Int16 nStrikeout) +{ + OUString sTextLineThroughStyle; + OUString sTextLineThroughText; + OUString sTextLineThroughType; + OUString sTextLineThroughWidth; + + switch (nStrikeout) + { + case css::awt::FontStrikeout::BOLD: + sTextLineThroughType = "single"; + sTextLineThroughWidth = "bold"; + break; + case css::awt::FontStrikeout::DONTKNOW: + break; + case css::awt::FontStrikeout::DOUBLE: + sTextLineThroughType = "double"; + break; + case css::awt::FontStrikeout::NONE: + sTextLineThroughStyle = "none"; + break; + case css::awt::FontStrikeout::SINGLE: + sTextLineThroughType = "single"; + break; + case css::awt::FontStrikeout::SLASH: + sTextLineThroughText = u"/"_ustr; + break; + case css::awt::FontStrikeout::X: + sTextLineThroughText = u"X"_ustr; + break; + default: + assert(false && "Unhandled strikeout type"); + } + + OUString sResult; + if (!sTextLineThroughStyle.isEmpty()) + sResult += u"text-line-through-style:"_ustr + sTextLineThroughStyle + ";"; + if (!sTextLineThroughText.isEmpty()) + sResult += u"text-line-through-text:"_ustr + sTextLineThroughText + ";"; + if (!sTextLineThroughType.isEmpty()) + sResult += u"text-line-through-type:"_ustr + sTextLineThroughType + ";"; + if (!sTextLineThroughWidth.isEmpty()) + sResult += u"text-line-through-width:"_ustr + sTextLineThroughWidth + ";"; + + return sResult; +} + +OUString lcl_convertFontWeight(double fontWeight) +{ + if (fontWeight == css::awt::FontWeight::THIN || fontWeight == css::awt::FontWeight::ULTRALIGHT) + return "100"; + if (fontWeight == css::awt::FontWeight::LIGHT) + return "200"; + if (fontWeight == css::awt::FontWeight::SEMILIGHT) + return "300"; + if (fontWeight == css::awt::FontWeight::NORMAL) + return "normal"; + if (fontWeight == css::awt::FontWeight::SEMIBOLD) + return "500"; + if (fontWeight == css::awt::FontWeight::BOLD) + return "bold"; + if (fontWeight == css::awt::FontWeight::ULTRABOLD) + return "800"; + if (fontWeight == css::awt::FontWeight::BLACK) + return "900"; + + // awt::FontWeight::DONTKNOW || fontWeight == awt::FontWeight::NORMAL + return "normal"; +} + +OUString lcl_ConvertFontSlant(css::awt::FontSlant eFontSlant) +{ + switch (eFontSlant) + { + case css::awt::FontSlant::FontSlant_NONE: + return "normal"; + case css::awt::FontSlant::FontSlant_OBLIQUE: + case css::awt::FontSlant::FontSlant_REVERSE_OBLIQUE: + return "oblique"; + case css::awt::FontSlant::FontSlant_ITALIC: + case css::awt::FontSlant::FontSlant_REVERSE_ITALIC: + return "italic"; + case css::awt::FontSlant::FontSlant_DONTKNOW: + case css::awt::FontSlant::FontSlant_MAKE_FIXED_SIZE: + default: + return ""; + } +} + +// s. https://wiki.linuxfoundation.org/accessibility/iaccessible2/textattributes +// for values +void lcl_ConvertFontUnderline(sal_Int16 nFontUnderline, OUString& rUnderlineStyle, + OUString& rUnderlineType, OUString& rUnderlineWidth) +{ + rUnderlineStyle = u""_ustr; + rUnderlineType = u"single"_ustr; + rUnderlineWidth = u"auto"_ustr; + + switch (nFontUnderline) + { + case css::awt::FontUnderline::BOLD: + rUnderlineWidth = u"bold"_ustr; + return; + case css::awt::FontUnderline::BOLDDASH: + rUnderlineWidth = u"bold"_ustr; + rUnderlineStyle = u"dash"_ustr; + return; + case css::awt::FontUnderline::BOLDDASHDOT: + rUnderlineWidth = u"bold"_ustr; + rUnderlineStyle = u"dot-dash"_ustr; + return; + case css::awt::FontUnderline::BOLDDASHDOTDOT: + rUnderlineWidth = u"bold"_ustr; + rUnderlineStyle = u"dot-dot-dash"_ustr; + return; + case css::awt::FontUnderline::BOLDDOTTED: + rUnderlineWidth = u"bold"_ustr; + rUnderlineStyle = u"dotted"_ustr; + return; + case css::awt::FontUnderline::BOLDLONGDASH: + rUnderlineWidth = u"bold"_ustr; + rUnderlineStyle = u"long-dash"_ustr; + return; + case css::awt::FontUnderline::BOLDWAVE: + rUnderlineWidth = u"bold"_ustr; + rUnderlineStyle = u"wave"_ustr; + return; + case css::awt::FontUnderline::DASH: + rUnderlineStyle = u"dash"_ustr; + return; + case css::awt::FontUnderline::DASHDOT: + rUnderlineStyle = u"dot-dash"_ustr; + return; + case css::awt::FontUnderline::DASHDOTDOT: + rUnderlineStyle = u"dot-dot-dash"_ustr; + return; + case css::awt::FontUnderline::DONTKNOW: + rUnderlineWidth = u""_ustr; + rUnderlineStyle = u""_ustr; + rUnderlineType = u""_ustr; + return; + case css::awt::FontUnderline::DOTTED: + rUnderlineStyle = u"dotted"_ustr; + return; + case css::awt::FontUnderline::DOUBLE: + rUnderlineType = u"double"_ustr; + return; + case css::awt::FontUnderline::DOUBLEWAVE: + rUnderlineStyle = u"wave"_ustr; + rUnderlineType = u"double"_ustr; + return; + case css::awt::FontUnderline::LONGDASH: + rUnderlineStyle = u"long-dash"_ustr; + return; + case css::awt::FontUnderline::NONE: + rUnderlineWidth = u"none"_ustr; + rUnderlineStyle = u"none"_ustr; + rUnderlineType = u"none"_ustr; + return; + case css::awt::FontUnderline::SINGLE: + rUnderlineType = u"single"_ustr; + return; + case css::awt::FontUnderline::SMALLWAVE: + case css::awt::FontUnderline::WAVE: + rUnderlineStyle = u"wave"_ustr; + return; + default: + assert(false && "Unhandled font underline type"); + } +} + +/** Converts Color to "rgb(r,g,b)" as specified in https://wiki.linuxfoundation.org/accessibility/iaccessible2/textattributes. */ +OUString lcl_ConvertColor(Color aColor) +{ + return u"rgb(" + OUString::number(aColor.GetRed()) + u"\\," + + OUString::number(aColor.GetGreen()) + u"\\," + OUString::number(aColor.GetBlue()) + + u")"; +} + +OUString lcl_ConvertParagraphAdjust(css::style::ParagraphAdjust eParaAdjust) +{ + switch (eParaAdjust) + { + case css::style::ParagraphAdjust_LEFT: + return u"left"_ustr; + case css::style::ParagraphAdjust_RIGHT: + return u"right"_ustr; + case css::style::ParagraphAdjust_BLOCK: + case css::style::ParagraphAdjust_STRETCH: + return u"justify"_ustr; + case css::style::ParagraphAdjust_CENTER: + return u"center"_ustr; + default: + assert(false && "Unhandled ParagraphAdjust value"); + return u""_ustr; + } +} +} + +OUString AccessibleTextAttributeHelper::ConvertUnoToIAccessible2TextAttributes( + const css::uno::Sequence<css::beans::PropertyValue>& rUnoAttributes, + IA2AttributeType eAttributeType) +{ + OUString aRet; + for (css::beans::PropertyValue const& prop : rUnoAttributes) + { + OUString sAttribute; + OUString sValue; + + if (eAttributeType & IA2AttributeType::TextAttributes) + { + if (prop.Name == "CharBackColor") + { + sAttribute = "background-color"; + sValue = lcl_ConvertColor( + Color(ColorTransparency, *o3tl::doAccess<sal_Int32>(prop.Value))); + } + else if (prop.Name == "CharColor") + { + sAttribute = "color"; + sValue = lcl_ConvertColor( + Color(ColorTransparency, *o3tl::doAccess<sal_Int32>(prop.Value))); + } + else if (prop.Name == "CharEscapement") + { + sAttribute = "text-position"; + const sal_Int16 nEscapement = *o3tl::doAccess<sal_Int16>(prop.Value); + sValue = lcl_ConvertCharEscapement(nEscapement); + } + else if (prop.Name == "CharFontName") + { + sAttribute = "font-family"; + sValue = *o3tl::doAccess<OUString>(prop.Value); + } + else if (prop.Name == "CharHeight") + { + sAttribute = "font-size"; + sValue = OUString::number(*o3tl::doAccess<double>(prop.Value)) + "pt"; + } + else if (prop.Name == "CharPosture") + { + sAttribute = "font-style"; + const css::awt::FontSlant eFontSlant + = *o3tl::doAccess<css::awt::FontSlant>(prop.Value); + sValue = lcl_ConvertFontSlant(eFontSlant); + } + else if (prop.Name == "CharStrikeout") + { + const sal_Int16 nStrikeout = *o3tl::doAccess<sal_Int16>(prop.Value); + aRet += lcl_ConverCharStrikeout(nStrikeout); + } + else if (prop.Name == "CharUnderline") + { + OUString sUnderlineStyle; + OUString sUnderlineType; + OUString sUnderlineWidth; + const sal_Int16 nUnderline = *o3tl::doAccess<sal_Int16>(prop.Value); + lcl_ConvertFontUnderline(nUnderline, sUnderlineStyle, sUnderlineType, + sUnderlineWidth); + + // leave 'sAttribute' and 'sName' empty, set all attributes here + if (!sUnderlineStyle.isEmpty()) + aRet += u"text-underline-style:" + sUnderlineStyle + ";"; + if (!sUnderlineType.isEmpty()) + aRet += u"text-underline-type:" + sUnderlineType + ";"; + if (!sUnderlineWidth.isEmpty()) + aRet += u"text-underline-width:" + sUnderlineWidth + ";"; + } + else if (prop.Name == "CharWeight") + { + sAttribute = "font-weight"; + sValue = lcl_convertFontWeight(*o3tl::doAccess<double>(prop.Value)); + } + } + + // so far, "ParaAdjust" is the only UNO text attribute that + // maps to an object attribute for IAccessible2 ("text-align") + if (sAttribute.isEmpty() && (eAttributeType & IA2AttributeType::ObjectAttributes) + && prop.Name == "ParaAdjust") + { + sAttribute = "text-align"; + const css::style::ParagraphAdjust eParaAdjust + = static_cast<css::style::ParagraphAdjust>(*o3tl::doAccess<sal_Int16>(prop.Value)); + sValue = lcl_ConvertParagraphAdjust(eParaAdjust); + } + + if (!sAttribute.isEmpty() && !sValue.isEmpty()) + aRet += sAttribute + ":" + sValue + ";"; + } + + return aRet; +} + +OUString AccessibleTextAttributeHelper::GetIAccessible2TextAttributes( + css::uno::Reference<css::accessibility::XAccessibleText> xText, IA2AttributeType eAttributeType, + sal_Int32 nOffset, sal_Int32& rStartOffset, sal_Int32& rEndOffset) +{ + assert(xText.is()); + + const css::uno::Sequence<css::beans::PropertyValue> attribs + = xText->getCharacterAttributes(nOffset, css::uno::Sequence<OUString>()); + OUString sAttributes = ConvertUnoToIAccessible2TextAttributes(attribs, eAttributeType); + + css::accessibility::TextSegment aAttributeRun + = xText->getTextAtIndex(nOffset, css::accessibility::AccessibleTextType::ATTRIBUTE_RUN); + rStartOffset = aAttributeRun.SegmentStart; + rEndOffset = aAttributeRun.SegmentEnd; + + // report spelling error as "invalid:spelling;" IA2 text attribute and + // adapt start/end index as necessary + css::uno::Reference<css::accessibility::XAccessibleTextMarkup> xTextMarkup(xText, + css::uno::UNO_QUERY); + if ((eAttributeType & IA2AttributeType::TextAttributes) && xTextMarkup.is()) + { + bool bInvalidSpelling = false; + const sal_Int32 nMarkupCount( + xTextMarkup->getTextMarkupCount(css::text::TextMarkupType::SPELLCHECK)); + for (sal_Int32 nMarkupIndex = 0; nMarkupIndex < nMarkupCount; ++nMarkupIndex) + { + const css::accessibility::TextSegment aTextSegment + = xTextMarkup->getTextMarkup(nMarkupIndex, css::text::TextMarkupType::SPELLCHECK); + const sal_Int32 nStartOffsetTextMarkup = aTextSegment.SegmentStart; + const sal_Int32 nEndOffsetTextMarkup = aTextSegment.SegmentEnd; + if (nStartOffsetTextMarkup <= nOffset) + { + if (nOffset < nEndOffsetTextMarkup) + { + // offset is inside invalid spelling + rStartOffset = ::std::max(rStartOffset, nStartOffsetTextMarkup); + rEndOffset = ::std::min(rEndOffset, nEndOffsetTextMarkup); + bInvalidSpelling = true; + break; + } + else + { + rStartOffset = ::std::max(rStartOffset, nEndOffsetTextMarkup); + } + } + else + { + rEndOffset = ::std::min(rEndOffset, nStartOffsetTextMarkup); + } + } + + if (bInvalidSpelling) + sAttributes += u"invalid:spelling;"_ustr; + } + + return sAttributes; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */ |