mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-16 00:34:19 +00:00
103 lines
3.2 KiB
C++
103 lines
3.2 KiB
C++
/*
|
|
==============================================================================
|
|
|
|
This file is part of the JUCE 7 technical preview.
|
|
Copyright (c) 2022 - Raw Material Software Limited
|
|
|
|
You may use this code under the terms of the GPL v3
|
|
(see www.gnu.org/licenses).
|
|
|
|
For the technical preview this file cannot be licensed commercially.
|
|
|
|
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
|
|
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
|
|
DISCLAIMED.
|
|
|
|
==============================================================================
|
|
*/
|
|
|
|
namespace juce
|
|
{
|
|
|
|
namespace AccessibilityTextHelpers
|
|
{
|
|
enum class BoundaryType
|
|
{
|
|
character,
|
|
word,
|
|
line,
|
|
document
|
|
};
|
|
|
|
enum class Direction
|
|
{
|
|
forwards,
|
|
backwards
|
|
};
|
|
|
|
static int findTextBoundary (const AccessibilityTextInterface& textInterface,
|
|
int currentPosition,
|
|
BoundaryType boundary,
|
|
Direction direction)
|
|
{
|
|
const auto numCharacters = textInterface.getTotalNumCharacters();
|
|
const auto isForwards = (direction == Direction::forwards);
|
|
const auto offsetWithDirection = [isForwards] (auto num) { return isForwards ? num : -num; };
|
|
|
|
switch (boundary)
|
|
{
|
|
case BoundaryType::character:
|
|
return jlimit (0, numCharacters, currentPosition + offsetWithDirection (1));
|
|
|
|
case BoundaryType::word:
|
|
case BoundaryType::line:
|
|
{
|
|
const auto text = [&]() -> String
|
|
{
|
|
if (isForwards)
|
|
return textInterface.getText ({ currentPosition, textInterface.getTotalNumCharacters() });
|
|
|
|
const auto str = textInterface.getText ({ 0, currentPosition });
|
|
|
|
auto start = str.getCharPointer();
|
|
auto end = start.findTerminatingNull();
|
|
const auto size = getAddressDifference (end.getAddress(), start.getAddress());
|
|
|
|
String reversed;
|
|
|
|
if (size > 0)
|
|
{
|
|
reversed.preallocateBytes ((size_t) size);
|
|
|
|
auto destPtr = reversed.getCharPointer();
|
|
|
|
for (;;)
|
|
{
|
|
destPtr.write (*--end);
|
|
|
|
if (end == start)
|
|
break;
|
|
}
|
|
|
|
destPtr.writeNull();
|
|
}
|
|
|
|
return reversed;
|
|
}();
|
|
|
|
auto tokens = (boundary == BoundaryType::line ? StringArray::fromLines (text)
|
|
: StringArray::fromTokens (text, false));
|
|
|
|
return currentPosition + offsetWithDirection (tokens[0].length());
|
|
}
|
|
|
|
case BoundaryType::document:
|
|
return isForwards ? numCharacters : 0;
|
|
}
|
|
|
|
jassertfalse;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
} // namespace juce
|