void Font::drawComplexText(GraphicsContext* context, const TextRun& run, const FloatPoint& point,
int from, int to) const
{
if (to < 0)
to = run.length();
if (from < 0)
from = 0;
TextRunComponents components;
int w = generateComponents(&components, *this, run);
int curPos = 0;
for (int i = 0; i < (int)components.size(); ++i) {
const TextRunComponent& comp = components.at(i);
int len = comp.textLength();
int curEnd = curPos + len;
if (curPos < to && from < curEnd && !comp.isSpace()) {
FloatPoint pt = point;
if (run.rtl())
pt.setX(point.x() + w - comp.m_offset - comp.m_width);
else
pt.setX(point.x() + comp.m_offset);
drawSimpleText(context, comp.m_textRun, pt, from - curPos, std::min(to, curEnd) - curPos);
}
curPos += len;
if (from < curPos)
from = curPos;
}
}
void Font::drawText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
// Don't draw anything while we are using custom fonts that are in the process of loading.
if (loadingCustomFonts())
return;
to = (to == -1 ? run.length() : to);
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont()) {
drawTextUsingSVGFont(context, run, point, from, to);
return;
}
#endif
CodePath codePathToUse = codePath(run);
#if PLATFORM(QT) && HAVE(QRAWFONT)
if (context->textDrawingMode() & TextModeStroke || context->contextShadow()->m_type != ContextShadow::NoShadow)
codePathToUse = Complex;
#endif
if (codePathToUse != Complex)
return drawSimpleText(context, run, point, from, to);
return drawComplexText(context, run, point, from, to);
}
void Font::drawText(BIGraphicsContext* context, const TextRun& run, const TextStyle& style, const FloatPoint& point) const
{
if (canUseGlyphCache(run))
drawSimpleText(context, run, style, point);
else
drawComplexText(context, run, style, point);
}
void Font::drawComplexText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
#if defined(USE_FREETYPE)
if (!primaryFont()->platformData().m_pattern) {
drawSimpleText(context, run, point, from, to);
return;
}
#endif
cairo_t* cr = context->platformContext();
PangoLayout* layout = pango_cairo_create_layout(cr);
setPangoAttributes(this, run, layout);
gchar* utf8 = convertUniCharToUTF8(run.characters(), run.length(), 0, run.length());
pango_layout_set_text(layout, utf8, -1);
// Our layouts are single line
PangoLayoutLine* layoutLine = pango_layout_get_line_readonly(layout, 0);
// Get the region where this text will be laid out. We will use it to clip
// the Cairo context, for when we are only painting part of the text run and
// to calculate the size of the shadow buffer.
PangoRegionType partialRegion = 0;
char* start = g_utf8_offset_to_pointer(utf8, from);
char* end = g_utf8_offset_to_pointer(start, to - from);
int ranges[] = {start - utf8, end - utf8};
partialRegion = gdk_pango_layout_line_get_clip_region(layoutLine, 0, 0, ranges, 1);
drawGlyphsShadow(context, cr, point, layoutLine, partialRegion);
cairo_save(cr);
cairo_translate(cr, point.x(), point.y());
float red, green, blue, alpha;
context->fillColor().getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha);
gdk_cairo_region(cr, partialRegion);
cairo_clip(cr);
pango_cairo_show_layout_line(cr, layoutLine);
if (context->textDrawingMode() & TextModeStroke) {
Color strokeColor = context->strokeColor();
strokeColor.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha);
pango_cairo_layout_line_path(cr, layoutLine);
cairo_set_line_width(cr, context->strokeThickness());
cairo_stroke(cr);
}
// Pango sometimes leaves behind paths we don't want
cairo_new_path(cr);
destroyPangoRegion(partialRegion);
g_free(utf8);
g_object_unref(layout);
cairo_restore(cr);
}
void Font::drawText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
// Don't draw anything while we are using custom fonts that are in the process of loading.
if (loadingCustomFonts())
return;
to = (to == -1 ? run.length() : to);
CodePath codePathToUse = codePath(run);
if (codePathToUse != Complex)
return drawSimpleText(context, run, point, from, to);
return drawComplexText(context, run, point, from, to);
}
void Font::drawText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
// Don't draw anything while we are using custom fonts that are in the process of loading.
if (loadingCustomFonts())
return;
to = (to == -1 ? run.length() : to);
CodePath codePathToUse = codePath(run);
// FIXME: Use the fast code path once it handles partial runs with kerning and ligatures. See http://webkit.org/b/100050
if (codePathToUse != Complex && typesettingFeatures() && (from || to != run.length()))
codePathToUse = Complex;
if (codePathToUse != Complex)
return drawSimpleText(context, run, point, from, to);
return drawComplexText(context, run, point, from, to);
}
void Font::drawText(GraphicsContext* context, const TextRunPaintInfo& runInfo, const FloatPoint& point, CustomFontNotReadyAction customFontNotReadyAction) const
{
// Don't draw anything while we are using custom fonts that are in the process of loading,
// except if the 'force' argument is set to true (in which case it will use a fallback
// font).
if (loadingCustomFonts() && customFontNotReadyAction == DoNotPaintIfFontNotReady)
return;
CodePath codePathToUse = codePath(runInfo.run);
// FIXME: Use the fast code path once it handles partial runs with kerning and ligatures. See http://webkit.org/b/100050
if (codePathToUse != ComplexPath && fontDescription().typesettingFeatures() && (runInfo.from || runInfo.to != runInfo.run.length()))
codePathToUse = ComplexPath;
if (codePathToUse != ComplexPath)
return drawSimpleText(context, runInfo, point);
return drawComplexText(context, runInfo, point);
}
void Font::drawText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
// Don't draw anything while we are using custom fonts that are in the process of loading.
if (loadingCustomFonts())
return;
to = (to == -1 ? run.length() : to);
CodePath codePathToUse = codePath(run);
#if PLATFORM(QT) && HAVE(QRAWFONT)
if (context->textDrawingMode() & TextModeStroke)
codePathToUse = Complex;
#endif
if (codePathToUse != Complex)
return drawSimpleText(context, run, point, from, to);
return drawComplexText(context, run, point, from, to);
}
void Font::drawText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
// Don't draw anything while we are using custom fonts that are in the process of loading.
if (loadingCustomFonts())
return;
to = (to == -1 ? run.length() : to);
#if ENABLE(SVG_FONTS)
if (primaryFont()->isSVGFont()) {
drawTextUsingSVGFont(context, run, point, from, to);
return;
}
#endif
if (codePath(run) != Complex)
return drawSimpleText(context, run, point, from, to);
return drawComplexText(context, run, point, from, to);
}