static float cummulatedWidthOrHeightOfTextChunk(SVGTextChunk& chunk, bool calcWidthOnly)
{
float length = 0.0f;
Vector<SVGChar>::iterator charIt = chunk.start;
Vector<SVGInlineBoxCharacterRange>::iterator it = chunk.boxes.begin();
Vector<SVGInlineBoxCharacterRange>::iterator end = chunk.boxes.end();
for (; it != end; ++it) {
SVGInlineBoxCharacterRange& range = *it;
SVGInlineTextBox* box = static_cast<SVGInlineTextBox*>(range.box);
RenderStyle* style = box->renderer()->style();
for (int i = range.startOffset; i < range.endOffset; ++i) {
ASSERT(charIt <= chunk.end);
// Determine how many characters - starting from the current - can be measured at once.
// Important for non-absolute positioned non-latin1 text (ie. Arabic) where ie. the width
// of a string is not the sum of the boundaries of all contained glyphs.
Vector<SVGChar>::iterator itSearch = charIt + 1;
Vector<SVGChar>::iterator endSearch = charIt + range.endOffset - i;
while (itSearch != endSearch) {
// No need to check for 'isHidden()' here as this function is not called for text paths.
if (itSearch->drawnSeperated)
break;
itSearch++;
}
unsigned int positionOffset = itSearch - charIt;
// Calculate width/height of subrange
SVGInlineBoxCharacterRange subRange;
subRange.box = range.box;
subRange.startOffset = i;
subRange.endOffset = i + positionOffset;
if (calcWidthOnly)
length += cummulatedWidthOfInlineBoxCharacterRange(subRange);
else
length += cummulatedHeightOfInlineBoxCharacterRange(subRange);
// Calculate gap between the previous & current range
// <text x="10 50 70">ABCD</text> - we need to take the gaps between A & B into account
// so add "40" as width, and analogous for B & C, add "20" as width.
if (itSearch > chunk.start && itSearch < chunk.end) {
SVGChar& lastCharacter = *(itSearch - 1);
SVGChar& currentCharacter = *itSearch;
int charsConsumed = 0;
float glyphWidth = 0.0f;
float glyphHeight = 0.0f;
String glyphName;
String unicodeString;
box->measureCharacter(style, i + positionOffset - 1, charsConsumed, glyphName, unicodeString, glyphWidth, glyphHeight);
if (calcWidthOnly)
length += currentCharacter.x - lastCharacter.x - glyphWidth;
else
length += currentCharacter.y - lastCharacter.y - glyphHeight;
}
// Advance processed characters
i += positionOffset - 1;
charIt = itSearch;
}
}
ASSERT(charIt == chunk.end);
return length;
}
static inline void writeSVGInlineTextBox(TextStream& ts, SVGInlineTextBox* textBox, int indent)
{
SVGRootInlineBox* rootBox = textBox->svgRootInlineBox();
if (!rootBox)
return;
Vector<SVGTextChunk>& chunks = const_cast<Vector<SVGTextChunk>& >(rootBox->svgTextChunks());
Vector<SVGTextChunk>::iterator it = chunks.begin();
Vector<SVGTextChunk>::iterator end = chunks.end();
// Write text chunks
unsigned int i = 1;
for (; it != end; ++it) {
SVGTextChunk& cur = *it;
// Write inline box character ranges
Vector<SVGInlineBoxCharacterRange>::iterator boxIt = cur.boxes.begin();
Vector<SVGInlineBoxCharacterRange>::iterator boxEnd = cur.boxes.end();
if (!containsInlineTextBox(cur, textBox)) {
i++;
continue;
}
writeIndent(ts, indent + 1);
unsigned int j = 1;
ts << "chunk " << i << " ";
if (cur.anchor == TA_MIDDLE) {
ts << "(middle anchor";
if (cur.isVerticalText)
ts << ", vertical";
ts << ") ";
} else if (cur.anchor == TA_END) {
ts << "(end anchor";
if (cur.isVerticalText)
ts << ", vertical";
ts << ") ";
} else if (cur.isVerticalText)
ts << "(vertical) ";
unsigned int totalOffset = 0;
for (; boxIt != boxEnd; ++boxIt) {
SVGInlineBoxCharacterRange& range = *boxIt;
unsigned int offset = range.endOffset - range.startOffset;
ASSERT(cur.start + totalOffset <= cur.end);
totalOffset += offset;
if (textBox != static_cast<SVGInlineTextBox*>(range.box)) {
j++;
continue;
}
FloatPoint topLeft = topLeftPositionOfCharacterRange(cur.start + totalOffset - offset, cur.start + totalOffset);
ts << "text run " << j << " at (" << topLeft.x() << "," << topLeft.y() << ") ";
ts << "startOffset " << range.startOffset << " endOffset " << range.endOffset;
if (cur.isVerticalText)
ts << " height " << cummulatedHeightOfInlineBoxCharacterRange(range);
else
ts << " width " << cummulatedWidthOfInlineBoxCharacterRange(range);
if (textBox->direction() == RTL || textBox->m_dirOverride) {
ts << (textBox->direction() == RTL ? " RTL" : " LTR");
if (textBox->m_dirOverride)
ts << " override";
}
ts << ": " << quoteAndEscapeNonPrintables(String(textBox->textRenderer()->text()).substring(textBox->start() + range.startOffset, offset)) << "\n";
j++;
}
i++;
}
}
