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/* -*- 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/.
*/
#include <vector>
#include <com/sun/star/accessibility/AccessibleTextType.hpp>
#include <com/sun/star/accessibility/TextSegment.hpp>
#include <com/sun/star/accessibility/XAccessibleText.hpp>
#include <com/sun/star/accessibility/XAccessibleTextAttributes.hpp>
#include <o3tl/any.hxx>
#include <sal/log.hxx>
#include "a11y.hxx"
#include "gtkaccessibletext.hxx"
#if GTK_CHECK_VERSION(4, 14, 0)
namespace
{
sal_Int16 lcl_GtkTextGranularityToUNOBoundaryType(GtkAccessibleTextGranularity eGranularity)
{
switch (eGranularity)
{
case GTK_ACCESSIBLE_TEXT_GRANULARITY_CHARACTER:
return css::accessibility::AccessibleTextType::CHARACTER;
case GTK_ACCESSIBLE_TEXT_GRANULARITY_WORD:
return css::accessibility::AccessibleTextType::WORD;
case GTK_ACCESSIBLE_TEXT_GRANULARITY_SENTENCE:
return css::accessibility::AccessibleTextType::SENTENCE;
case GTK_ACCESSIBLE_TEXT_GRANULARITY_LINE:
return css::accessibility::AccessibleTextType::LINE;
case GTK_ACCESSIBLE_TEXT_GRANULARITY_PARAGRAPH:
return css::accessibility::AccessibleTextType::PARAGRAPH;
default:
assert(false && "Unhandled GtkAccessibleTextGranularity.");
return GTK_ACCESSIBLE_TEXT_GRANULARITY_CHARACTER;
}
}
css::uno::Reference<css::accessibility::XAccessibleText> getXText(GtkAccessibleText* pGtkText)
{
LoAccessible* pAccessible = LO_ACCESSIBLE(pGtkText);
if (!pAccessible->uno_accessible)
return nullptr;
css::uno::Reference<css::accessibility::XAccessibleContext> xContext(
pAccessible->uno_accessible->getAccessibleContext());
css::uno::Reference<css::accessibility::XAccessibleText> xText(xContext, css::uno::UNO_QUERY);
return xText;
}
}
static GBytes* lo_accessible_text_get_contents(GtkAccessibleText* self, unsigned int start,
unsigned int end)
{
css::uno::Reference<css::accessibility::XAccessibleText> xText = getXText(self);
if (!xText.is())
return nullptr;
// G_MAXUINT has special meaning: end of the text
const sal_Int32 nEndIndex = (end == G_MAXUINT) ? xText->getCharacterCount() : end;
const OString sText
= rtl::OUStringToOString(xText->getTextRange(start, nEndIndex), RTL_TEXTENCODING_UTF8);
return g_bytes_new(sText.getStr(), sText.getLength());
}
static GBytes* lo_accessible_text_get_contents_at(GtkAccessibleText* self, unsigned int offset,
GtkAccessibleTextGranularity eGranularity,
unsigned int* start, unsigned int* end)
{
css::uno::Reference<css::accessibility::XAccessibleText> xText = getXText(self);
if (!xText.is())
return nullptr;
if (offset > o3tl::make_unsigned(xText->getCharacterCount()))
{
SAL_WARN("vcl.gtk",
"lo_accessible_text_get_contents_at called with invalid offset: " << offset);
return nullptr;
}
const sal_Int16 nUnoBoundaryType = lcl_GtkTextGranularityToUNOBoundaryType(eGranularity);
const css::accessibility::TextSegment aSegment
= xText->getTextAtIndex(offset, nUnoBoundaryType);
*start = o3tl::make_unsigned(aSegment.SegmentStart);
*end = o3tl::make_unsigned(aSegment.SegmentEnd);
const OString sText = rtl::OUStringToOString(aSegment.SegmentText, RTL_TEXTENCODING_UTF8);
return g_bytes_new(sText.getStr(), sText.getLength());
}
static unsigned int lo_accessible_text_get_caret_position(GtkAccessibleText* self)
{
css::uno::Reference<css::accessibility::XAccessibleText> xText = getXText(self);
if (!xText.is())
return 0;
return std::max(sal_Int32(0), xText->getCaretPosition());
}
static gboolean lo_accessible_text_get_selection(GtkAccessibleText* self, gsize* n_ranges,
GtkAccessibleTextRange** ranges)
{
css::uno::Reference<css::accessibility::XAccessibleText> xText = getXText(self);
if (!xText.is())
return 0;
if (xText->getSelectedText().isEmpty())
return false;
const sal_Int32 nSelectionStart = xText->getSelectionStart();
const sal_Int32 nSelectionEnd = xText->getSelectionEnd();
*n_ranges = 1;
*ranges = g_new(GtkAccessibleTextRange, 1);
(*ranges)[0].start = std::min(nSelectionStart, nSelectionEnd);
(*ranges)[0].length = std::abs(nSelectionEnd - nSelectionStart);
return true;
}
static int
convertUnoTextAttributesToGtk(const css::uno::Sequence<css::beans::PropertyValue>& rAttribs,
char*** attribute_names, char*** attribute_values)
{
std::vector<std::pair<OString, OUString>> aNameValuePairs;
for (const css::beans::PropertyValue& rAttribute : rAttribs)
{
if (rAttribute.Name == "CharFontName")
{
const OUString sValue = *o3tl::doAccess<OUString>(rAttribute.Value);
aNameValuePairs.emplace_back(GTK_ACCESSIBLE_ATTRIBUTE_FAMILY, sValue);
}
}
if (aNameValuePairs.empty())
return 0;
const int nCount = aNameValuePairs.size();
*attribute_names = g_new(char*, nCount + 1);
*attribute_values = g_new(char*, nCount + 1);
for (int i = 0; i < nCount; i++)
{
(*attribute_names)[i] = g_strdup(aNameValuePairs[i].first.getStr());
(*attribute_values)[i] = g_strdup(
OUStringToOString(aNameValuePairs[i].second, RTL_TEXTENCODING_UTF8).getStr());
}
(*attribute_names)[nCount] = nullptr;
(*attribute_values)[nCount] = nullptr;
return nCount;
}
static gboolean lo_accessible_text_get_attributes(GtkAccessibleText* self, unsigned int offset,
gsize* n_ranges, GtkAccessibleTextRange** ranges,
char*** attribute_names, char*** attribute_values)
{
css::uno::Reference<css::accessibility::XAccessibleText> xText = getXText(self);
if (!xText.is())
return false;
const unsigned int nTextLength = o3tl::make_unsigned(xText->getCharacterCount());
if (offset == nTextLength)
offset = nTextLength - 1;
if (offset >= nTextLength)
{
SAL_WARN("vcl.gtk",
"lo_accessible_text_get_attributes called with invalid offset: " << offset);
return false;
}
css::uno::Sequence<css::beans::PropertyValue> aAttribs;
css::uno::Reference<css::accessibility::XAccessibleTextAttributes> xAttributes(
xText, css::uno::UNO_QUERY);
if (xAttributes.is())
aAttribs = xAttributes->getRunAttributes(offset, css::uno::Sequence<OUString>());
else
aAttribs = xText->getCharacterAttributes(offset, css::uno::Sequence<OUString>());
const int nCount = convertUnoTextAttributesToGtk(aAttribs, attribute_names, attribute_values);
if (nCount == 0)
return false;
*n_ranges = nCount;
*ranges = g_new(GtkAccessibleTextRange, nCount);
// just use start and end of attribute run for each single attribute
const css::accessibility::TextSegment aAttributeRun
= xText->getTextAtIndex(offset, css::accessibility::AccessibleTextType::ATTRIBUTE_RUN);
for (int i = 0; i < nCount; i++)
{
((*ranges)[i]).start = aAttributeRun.SegmentStart;
((*ranges)[i]).length = aAttributeRun.SegmentEnd - aAttributeRun.SegmentStart;
}
return true;
}
static void lo_accessible_text_get_default_attributes(GtkAccessibleText* self,
char*** attribute_names,
char*** attribute_values)
{
css::uno::Reference<css::accessibility::XAccessibleText> xText = getXText(self);
if (!xText.is())
return;
css::uno::Reference<css::accessibility::XAccessibleTextAttributes> xAttributes(
xText, css::uno::UNO_QUERY);
if (!xAttributes.is())
return;
css::uno::Sequence<css::beans::PropertyValue> aAttribs
= xAttributes->getDefaultAttributes(css::uno::Sequence<OUString>());
convertUnoTextAttributesToGtk(aAttribs, attribute_names, attribute_values);
}
#if GTK_CHECK_VERSION(4, 15, 0)
static gboolean lo_accessible_text_get_extents(GtkAccessibleText* self, unsigned int start,
unsigned int end, graphene_rect_t* extents)
{
css::uno::Reference<css::accessibility::XAccessibleText> xText = getXText(self);
if (!xText.is())
return false;
if (end != start + 1)
{
SAL_WARN("vcl.gtk", "lo_accessible_text_get_extents called for a text range of more than a "
"single character. This is not implemented yet.");
return false;
}
if (start > o3tl::make_unsigned(xText->getCharacterCount()))
{
SAL_WARN("vcl.gtk",
"lo_accessible_text_get_extents called with invalid start index: " << start);
return false;
}
css::awt::Rectangle aBounds = xText->getCharacterBounds(start);
extents->origin.x = aBounds.X;
extents->origin.y = aBounds.Y;
extents->size.width = aBounds.Width;
extents->size.height = aBounds.Height;
return true;
}
static gboolean lo_accessible_text_get_offset(GtkAccessibleText* self,
const graphene_point_t* point, unsigned int* offset)
{
css::uno::Reference<css::accessibility::XAccessibleText> xText = getXText(self);
if (!xText.is())
return false;
css::awt::Point aPoint(point->x, point->y);
const sal_Int32 nIndex = xText->getIndexAtPoint(aPoint);
if (nIndex < 0)
return false;
*offset = nIndex;
return true;
}
#endif
void lo_accessible_text_init(gpointer iface_, gpointer)
{
auto const iface = static_cast<GtkAccessibleTextInterface*>(iface_);
iface->get_contents = lo_accessible_text_get_contents;
iface->get_contents_at = lo_accessible_text_get_contents_at;
iface->get_caret_position = lo_accessible_text_get_caret_position;
iface->get_selection = lo_accessible_text_get_selection;
iface->get_attributes = lo_accessible_text_get_attributes;
iface->get_default_attributes = lo_accessible_text_get_default_attributes;
#if GTK_CHECK_VERSION(4, 15, 0)
iface->get_extents = lo_accessible_text_get_extents;
iface->get_offset = lo_accessible_text_get_offset;
#endif
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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