IFACEMETHODIMP TextAnalysis::SetBidiLevel(
UINT32 textPosition,
UINT32 textLength,
UINT8 explicitLevel,
UINT8 resolvedLevel
)
{
try
{
SetCurrentRun(textPosition);
SplitCurrentRun(textPosition);
while (textLength > 0)
{
LinkedRun& run = FetchNextRun(&textLength);
run.bidiLevel = resolvedLevel;
run.isReversed = !!(resolvedLevel & 1);
}
}
catch (...)
{
return E_FAIL; // Unknown error, probably out of memory.
}
return S_OK;
}
STDMETHODIMP TextAnalysis::GetVerticalGlyphOrientation(
UINT32 textPosition,
_Out_ UINT32* textLength,
_Out_ DWRITE_VERTICAL_GLYPH_ORIENTATION* glyphOrientation,
_Out_ UINT8* bidiLevel
)
{
SetCurrentRun(textPosition);
const LinkedRun& run = m_runs[m_currentRunIndex];
*bidiLevel = run.bidiLevel;
*glyphOrientation = DWRITE_VERTICAL_GLYPH_ORIENTATION_DEFAULT;
// Find the next range where a bidi level changes.
const size_t totalRuns = m_runs.size();
UINT32 lastRunPosition = textPosition;
UINT32 nextRunIndex = m_currentRunIndex;
do
{
const LinkedRun& nextRun = m_runs[nextRunIndex];
if (nextRun.bidiLevel != run.bidiLevel)
{
break;
}
lastRunPosition = nextRun.textStart + nextRun.textLength;
nextRunIndex = nextRun.nextRunIndex;
}
while (nextRunIndex < totalRuns && nextRunIndex != 0);
*textLength = lastRunPosition - textPosition;
return S_OK;
}
IFACEMETHODIMP
TextAnalysis::SetScriptAnalysis(UINT32 textPosition,
UINT32 textLength,
DWRITE_SCRIPT_ANALYSIS const* scriptAnalysis)
{
SetCurrentRun(textPosition);
SplitCurrentRun(textPosition);
while (textLength > 0) {
Run *run = FetchNextRun(&textLength);
run->mScript = *scriptAnalysis;
}
return S_OK;
}
IFACEMETHODIMP
TextAnalysis::SetBidiLevel(UINT32 textPosition,
UINT32 textLength,
UINT8 explicitLevel,
UINT8 resolvedLevel)
{
SetCurrentRun(textPosition);
SplitCurrentRun(textPosition);
while (textLength > 0) {
Run *run = FetchNextRun(&textLength);
run->mBidiLevel = resolvedLevel;
}
return S_OK;
}
IFACEMETHODIMP TextAnalysis::SetNumberSubstitution(
UINT32 textPosition,
UINT32 textLength,
IDWriteNumberSubstitution* numberSubstitution
)
{
try
{
SetCurrentRun(textPosition);
SplitCurrentRun(textPosition);
while (textLength > 0)
{
LinkedRun& run = FetchNextRun(&textLength);
run.isNumberSubstituted = (numberSubstitution != nullptr);
}
}
catch (...)
{
return E_FAIL; // Unknown error, probably out of memory.
}
return S_OK;
}
IFACEMETHODIMP TextAnalysis::SetScriptAnalysis(
UINT32 textPosition,
UINT32 textLength,
DWRITE_SCRIPT_ANALYSIS const* scriptAnalysis
)
{
try
{
SetCurrentRun(textPosition);
SplitCurrentRun(textPosition);
while (textLength > 0)
{
LinkedRun& run = FetchNextRun(&textLength);
run.script = *scriptAnalysis;
}
}
catch (...)
{
return E_FAIL; // Unknown error, probably out of memory.
}
return S_OK;
}
IFACEMETHODIMP TextAnalysis::SetGlyphOrientation(
UINT32 textPosition,
UINT32 textLength,
DWRITE_GLYPH_ORIENTATION_ANGLE glyphOrientationAngle,
UINT8 adjustedBidiLevel,
BOOL isSideways,
BOOL isRightToLeft
)
{
try
{
// Mapping from angle down to small orientation.
const static UINT8 glyphOrientations[] = {
GlyphOrientationCW0,
GlyphOrientationCW90,
GlyphOrientationCW180,
GlyphOrientationCW270,
};
SetCurrentRun(textPosition);
SplitCurrentRun(textPosition);
while (textLength > 0)
{
LinkedRun& run = FetchNextRun(&textLength);
run.glyphOrientation = glyphOrientations[glyphOrientationAngle & 3];
run.isSideways = !!isSideways;
run.isReversed = !!isRightToLeft;
run.bidiLevel = adjustedBidiLevel;
}
}
catch (...)
{
return E_FAIL; // Unknown error, probably out of memory.
}
return S_OK;
}