void InlineTextBox::showBox(int printedCharacters) const
{
String value = text();
value.replaceWithLiteral('\\', "\\\\");
value.replaceWithLiteral('\n', "\\n");
printedCharacters += fprintf(stderr, "%s %p", boxName(), this);
for (; printedCharacters < showTreeCharacterOffset; printedCharacters++)
fputc(' ', stderr);
const LineLayoutText obj = lineLayoutItem();
printedCharacters = fprintf(stderr, "\t%s %p", obj.name(), obj.debugPointer());
const int layoutObjectCharacterOffset = 75;
for (; printedCharacters < layoutObjectCharacterOffset; printedCharacters++)
fputc(' ', stderr);
fprintf(stderr, "(%d,%d) \"%s\"\n", start(), start() + len(), value.utf8().data());
}
int InlineTextBox::offsetForPosition(LayoutUnit lineOffset, bool includePartialGlyphs) const
{
if (isLineBreak())
return 0;
if (lineOffset - logicalLeft() > logicalWidth())
return isLeftToRightDirection() ? len() : 0;
if (lineOffset - logicalLeft() < 0)
return isLeftToRightDirection() ? 0 : len();
LineLayoutText text = lineLayoutItem();
const ComputedStyle& style = text.styleRef(isFirstLineStyle());
const Font& font = style.font();
return font.offsetForPosition(constructTextRun(style, font), (lineOffset - logicalLeft()).toFloat(), includePartialGlyphs);
}
LayoutUnit InlineTextBox::positionForOffset(int offset) const
{
ASSERT(offset >= m_start);
ASSERT(offset <= m_start + m_len);
if (isLineBreak())
return logicalLeft();
LineLayoutText text = lineLayoutItem();
const ComputedStyle& styleToUse = text.styleRef(isFirstLineStyle());
const Font& font = styleToUse.font();
int from = !isLeftToRightDirection() ? offset - m_start : 0;
int to = !isLeftToRightDirection() ? m_len : offset - m_start;
// FIXME: Do we need to add rightBearing here?
return font.selectionRectForText(constructTextRun(styleToUse, font), IntPoint(logicalLeft(), 0), 0, from, to).maxX();
}
TextRun constructTextRun(const Font& font,
const LineLayoutText text,
unsigned offset,
unsigned length,
const ComputedStyle& style) {
ASSERT(offset + length <= text.textLength());
if (text.hasEmptyText())
return constructTextRunInternal(font, static_cast<const LChar*>(nullptr), 0,
style, LTR);
if (text.is8Bit())
return constructTextRunInternal(font, text.characters8() + offset, length,
style, LTR);
TextRun run = constructTextRunInternal(font, text.characters16() + offset,
length, style, LTR);
run.setDirection(directionForRun(run));
return run;
}
TextRun SVGInlineTextBox::constructTextRun(const ComputedStyle& style, const SVGTextFragment& fragment) const
{
LineLayoutText text = lineLayoutItem();
// FIXME(crbug.com/264211): This should not be necessary but can occur if we
// layout during layout. Remove this when 264211 is fixed.
RELEASE_ASSERT(!text.needsLayout());
TextRun run(static_cast<const LChar*>(nullptr) // characters, will be set below if non-zero.
, 0 // length, will be set below if non-zero.
, 0 // xPos, only relevant with allowTabs=true
, 0 // padding, only relevant for justified text, not relevant for SVG
, TextRun::AllowTrailingExpansion
, direction()
, dirOverride() || style.rtlOrdering() == VisualOrder /* directionalOverride */);
if (fragment.length) {
if (text.is8Bit())
run.setText(text.characters8() + fragment.characterOffset, fragment.length);
else
run.setText(text.characters16() + fragment.characterOffset, fragment.length);
}
// We handle letter & word spacing ourselves.
run.disableSpacing();
// Propagate the maximum length of the characters buffer to the TextRun, even when we're only processing a substring.
run.setCharactersLength(text.textLength() - fragment.characterOffset);
ASSERT(run.charactersLength() >= run.length());
return run;
}
TextRun SVGInlineTextBox::constructTextRun(
const ComputedStyle& style,
const SVGTextFragment& fragment) const {
LineLayoutText text = getLineLayoutItem();
CHECK(!text.needsLayout());
TextRun run(
// characters, will be set below if non-zero.
static_cast<const LChar*>(nullptr),
0, // length, will be set below if non-zero.
0, // xPos, only relevant with allowTabs=true
0, // padding, only relevant for justified text, not relevant for SVG
TextRun::AllowTrailingExpansion, direction(),
dirOverride() ||
style.rtlOrdering() == VisualOrder /* directionalOverride */);
if (fragment.length) {
if (text.is8Bit())
run.setText(text.characters8() + fragment.characterOffset,
fragment.length);
else
run.setText(text.characters16() + fragment.characterOffset,
fragment.length);
}
// We handle letter & word spacing ourselves.
run.disableSpacing();
// Propagate the maximum length of the characters buffer to the TextRun, even
// when we're only processing a substring.
run.setCharactersLength(text.textLength() - fragment.characterOffset);
ASSERT(run.charactersLength() >= run.length());
return run;
}