static bool characterNumberAtPositionCallback(QueryData* queryData, const SVGTextFragment& fragment)
{
CharacterNumberAtPositionData* data = static_cast<CharacterNumberAtPositionData*>(queryData);
// Test the query point against the bounds of the entire fragment first.
FloatRect fragmentExtents = calculateFragmentBoundaries(*queryData->textLayoutObject, fragment);
if (!fragmentExtents.contains(data->position))
return false;
// Iterate through the glyphs in this fragment, and check if their extents
// contain the query point.
FloatRect extent;
const Vector<SVGTextMetrics>& textMetrics = queryData->textLayoutObject->layoutAttributes()->textMetricsValues();
unsigned textMetricsOffset = fragment.metricsListOffset;
unsigned fragmentOffset = 0;
while (fragmentOffset < fragment.length) {
calculateGlyphBoundaries(queryData, fragment, fragmentOffset, extent);
if (extent.contains(data->position)) {
// Compute the character offset of the glyph within the text node.
unsigned offsetInBox = fragment.characterOffset - queryData->textBox->start() + fragmentOffset;
data->offsetInTextNode = logicalOffsetInTextNode(*queryData->textLayoutObject, queryData->textBox, offsetInBox);
data->hitLayoutObject = data->textLayoutObject;
return true;
}
fragmentOffset += textMetrics[textMetricsOffset].length();
textMetricsOffset++;
}
return false;
}
bool SVGTextQuery::characterNumberAtPositionCallback(Data* queryData, const SVGTextFragment& fragment) const
{
CharacterNumberAtPositionData* data = static_cast<CharacterNumberAtPositionData*>(queryData);
// Test the query point against the bounds of the entire fragment first.
FloatRect fragmentExtents = calculateFragmentBoundaries(*queryData->textRenderer, fragment);
if (!fragmentExtents.contains(data->position))
return false;
// Iterate through the glyphs in this fragment, and check if their extents
// contain the query point.
FloatRect extent;
const Vector<SVGTextMetrics>& textMetrics = queryData->textRenderer->layoutAttributes()->textMetricsValues();
unsigned textMetricsOffset = fragment.metricsListOffset;
unsigned fragmentOffset = 0;
while (fragmentOffset < fragment.length) {
calculateGlyphBoundaries(queryData, fragment, fragmentOffset, extent);
if (extent.contains(data->position)) {
// Compute the character offset of the glyph within the text box
// and add to processedCharacters.
unsigned characterOffset = fragment.characterOffset + fragmentOffset;
data->processedCharacters += characterOffset - data->textBox->start();
return true;
}
fragmentOffset += textMetrics[textMetricsOffset].length();
textMetricsOffset++;
}
return false;
}
bool SVGTextQuery::extentOfCharacterCallback(Data* queryData, const SVGTextFragment& fragment) const
{
ExtentOfCharacterData* data = static_cast<ExtentOfCharacterData*>(queryData);
int startPosition = data->position;
int endPosition = startPosition + 1;
if (!mapStartEndPositionsIntoFragmentCoordinates(queryData, fragment, startPosition, endPosition))
return false;
calculateGlyphBoundaries(queryData, fragment, startPosition, data->extent);
return true;
}
bool SVGTextQuery::characterNumberAtPositionCallback(Data* queryData, const SVGTextFragment& fragment) const
{
CharacterNumberAtPositionData* data = static_cast<CharacterNumberAtPositionData*>(queryData);
FloatRect extent;
for (unsigned i = 0; i < fragment.length; ++i) {
int startPosition = data->processedCharacters + i;
int endPosition = startPosition + 1;
if (!mapStartEndPositionsIntoFragmentCoordinates(queryData, fragment, startPosition, endPosition))
continue;
calculateGlyphBoundaries(queryData, fragment, startPosition, extent);
if (extent.contains(data->position)) {
data->processedCharacters += i;
return true;
}
}
return false;
}
