#include "config.h"
#include "Font.h"
#include "FloatRect.h"
#include "FontCache.h"
#include "IntPoint.h"
#include "GlyphBuffer.h"
#include "WidthIterator.h"
#include <wtf/MathExtras.h>
#include <wtf/UnusedParam.h>
using namespace WTF;
using namespace Unicode;
namespace WebCore {
#if USE(FONT_FAST_PATH)
const uint8_t Font::gRoundingHackCharacterTable[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 1 , 1 , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1 , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 ,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1 , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
Font::CodePath Font::s_codePath = Auto;
#endif
Font::Font()
: m_letterSpacing(0)
, m_wordSpacing(0)
, m_isPlatformFont(false)
{
}
Font::Font(const FontDescription& fd, short letterSpacing, short wordSpacing)
: m_fontDescription(fd)
, m_letterSpacing(letterSpacing)
, m_wordSpacing(wordSpacing)
, m_isPlatformFont(false)
{
}
Font::Font(const FontPlatformData& fontData, bool isPrinterFont)
: m_fontList(FontFallbackList::create())
, m_letterSpacing(0)
, m_wordSpacing(0)
, m_isPlatformFont(true)
{
m_fontDescription.setUsePrinterFont(isPrinterFont);
m_fontList->setPlatformFont(fontData);
}
Font::Font(const Font& other)
: m_fontDescription(other.m_fontDescription)
, m_fontList(other.m_fontList)
, m_letterSpacing(other.m_letterSpacing)
, m_wordSpacing(other.m_wordSpacing)
, m_isPlatformFont(other.m_isPlatformFont)
{
}
Font& Font::operator=(const Font& other)
{
m_fontDescription = other.m_fontDescription;
m_fontList = other.m_fontList;
m_letterSpacing = other.m_letterSpacing;
m_wordSpacing = other.m_wordSpacing;
m_isPlatformFont = other.m_isPlatformFont;
return *this;
}
bool Font::operator==(const Font& other) const
{
if ((m_fontList && m_fontList->loadingCustomFonts()) ||
(other.m_fontList && other.m_fontList->loadingCustomFonts()))
return false;
FontSelector* first = m_fontList ? m_fontList->fontSelector() : 0;
FontSelector* second = other.m_fontList ? other.m_fontList->fontSelector() : 0;
return first == second
&& m_fontDescription == other.m_fontDescription
&& m_letterSpacing == other.m_letterSpacing
&& m_wordSpacing == other.m_wordSpacing
&& (m_fontList ? m_fontList->generation() : 0) == (other.m_fontList ? other.m_fontList->generation() : 0);
}
void Font::update(PassRefPtr<FontSelector> fontSelector) const
{
if (!m_fontList)
m_fontList = FontFallbackList::create();
m_fontList->invalidate(fontSelector);
}
void Font::drawText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
if (m_fontList && m_fontList->loadingCustomFonts())
return;
to = (to == -1 ? run.length() : to);
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont()) {
drawTextUsingSVGFont(context, run, point, from, to);
return;
}
#endif
#if USE(FONT_FAST_PATH)
if (codePath(run) != Complex)
return drawSimpleText(context, run, point, from, to);
#endif
return drawComplexText(context, run, point, from, to);
}
float Font::floatWidth(const TextRun& run, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow* glyphOverflow) const
{
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont())
return floatWidthUsingSVGFont(run);
#endif
#if USE(FONT_FAST_PATH)
CodePath codePathToUse = codePath(run);
if (codePathToUse != Complex) {
static bool returnFallbackFonts = canReturnFallbackFontsForComplexText();
return floatWidthForSimpleText(run, 0, returnFallbackFonts ? fallbackFonts : 0, codePathToUse == SimpleWithGlyphOverflow ? glyphOverflow : 0);
}
#endif
return floatWidthForComplexText(run, fallbackFonts, glyphOverflow);
}
float Font::floatWidth(const TextRun& run, int extraCharsAvailable, int& charsConsumed, String& glyphName) const
{
#if !ENABLE(SVG_FONTS)
UNUSED_PARAM(extraCharsAvailable);
#else
if (primaryFont()->isSVGFont())
return floatWidthUsingSVGFont(run, extraCharsAvailable, charsConsumed, glyphName);
#endif
charsConsumed = run.length();
glyphName = "";
#if USE(FONT_FAST_PATH)
if (codePath(run) != Complex)
return floatWidthForSimpleText(run, 0);
#endif
return floatWidthForComplexText(run);
}
FloatRect Font::selectionRectForText(const TextRun& run, const IntPoint& point, int h, int from, int to) const
{
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont())
return selectionRectForTextUsingSVGFont(run, point, h, from, to);
#endif
to = (to == -1 ? run.length() : to);
#if USE(FONT_FAST_PATH)
if (codePath(run) != Complex)
return selectionRectForSimpleText(run, point, h, from, to);
#endif
return selectionRectForComplexText(run, point, h, from, to);
}
int Font::offsetForPosition(const TextRun& run, int x, bool includePartialGlyphs) const
{
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont())
return offsetForPositionForTextUsingSVGFont(run, x, includePartialGlyphs);
#endif
#if USE(FONT_FAST_PATH)
if (codePath(run) != Complex)
return offsetForPositionForSimpleText(run, x, includePartialGlyphs);
#endif
return offsetForPositionForComplexText(run, x, includePartialGlyphs);
}
#if ENABLE(SVG_FONTS)
bool Font::isSVGFont() const
{
return primaryFont()->isSVGFont();
}
#endif
String Font::normalizeSpaces(const String& string)
{
const UChar* characters = string.characters();
unsigned length = string.length();
Vector<UChar, 256> buffer(length);
bool didReplacement = false;
for (unsigned i = 0; i < length; ++i) {
UChar originalCharacter = characters[i];
buffer[i] = normalizeSpaces(originalCharacter);
if (buffer[i] != originalCharacter)
didReplacement = true;
}
return didReplacement ? String(buffer.data(), length) : string;
}
static bool shouldUseFontSmoothing = true;
void Font::setShouldUseSmoothing(bool shouldUseSmoothing)
{
ASSERT(isMainThread());
shouldUseFontSmoothing = shouldUseSmoothing;
}
bool Font::shouldUseSmoothing()
{
return shouldUseFontSmoothing;
}
}