#include "support/unicode.h"
-using lyx::char_type;
-using lyx::docstring;
-
using std::string;
namespace lyx {
namespace frontend {
-
GuiFontMetrics::GuiFontMetrics(QFont const & font)
: metrics_(font), smallcaps_metrics_(font), smallcaps_shape_(false)
{
-#ifdef USE_LYX_FONTCACHE
- for (int i = 0; i != 65536; ++i)
- widthcache_[i] = -1;
-#endif
}
}
-int GuiFontMetrics::ascent(char_type c) const
-{
- QRect const & r = metrics_.boundingRect(ucs4_to_qchar(c));
- return -r.top();
-}
-
-
-int GuiFontMetrics::descent(char_type c) const
-{
- QRect const & r = metrics_.boundingRect(ucs4_to_qchar(c));
- return r.bottom() + 1;
-}
-
-
int GuiFontMetrics::lbearing(char_type c) const
{
return metrics_.leftBearing(ucs4_to_qchar(c));
// casts in reality.
if (ls == 1 && !smallcaps_shape_) {
- QChar const c = ucs4_to_qchar(s[0]);
- return width(c.unicode());
+ return width(s[0]);
}
- QString ucs2;
- ucs4_to_qstring(s, ls, ucs2);
-
- if (smallcaps_shape_)
+ if (smallcaps_shape_) {
+ QString ucs2;
+ ucs4_to_qstring(s, ls, ucs2);
return smallcapsWidth(ucs2);
+ }
int w = 0;
for (unsigned int i = 0; i < ls; ++i)
- w += width(ucs2[i].unicode());
+ w += width(s[i]);
return w;
}
int GuiFontMetrics::signedWidth(docstring const & s) const
{
+ if (s.empty())
+ return 0;
+
if (s[0] == '-')
return -width(&(s[1]), s.length() - 1);
else
descent = metrics_.descent() + d;
}
-#ifdef USE_LYX_FONTCACHE
-int GuiFontMetrics::width(unsigned short val) const
+#ifndef USE_LYX_FONTCACHE
+
+int GuiFontMetrics::ascent(char_type c) const
{
- if (widthcache_[val] == -1)
- widthcache_[val] = metrics_.width(QChar(val));
- return widthcache_[val];
+ QRect const & r = metrics_.boundingRect(ucs4_to_qchar(c));
+ return -r.top();
}
-#endif
+
+int GuiFontMetrics::descent(char_type c) const
+{
+ QRect const & r = metrics_.boundingRect(ucs4_to_qchar(c));
+ return r.bottom() + 1;
+}
+
+#else
+
+void GuiFontMetrics::fillMetricsCache(char_type c) const
+{
+ QRect const & r = metrics_.boundingRect(ucs4_to_qchar(c));
+ AscendDescend ad = { -r.top(), r.bottom() + 1};
+ // We could as well compute the width but this is not really
+ // needed for now as it is done directly in width() below.
+ metrics_cache_.insert(c, ad);
+}
+
+
+int GuiFontMetrics::width(char_type c) const
+{
+ if (!width_cache_.contains(c)) {
+ width_cache_.insert(c, metrics_.width(ucs4_to_qchar(c)));
+ }
+
+ return width_cache_.value(c);
}
+
+
+int GuiFontMetrics::ascent(char_type c) const
+{
+ if (!metrics_cache_.contains(c))
+ fillMetricsCache(c);
+
+ return metrics_cache_.value(c).ascent;
+}
+
+
+int GuiFontMetrics::descent(char_type c) const
+{
+ if (!metrics_cache_.contains(c))
+ fillMetricsCache(c);
+
+ return metrics_cache_.value(c).descent;
}
+
+#endif
+
+} // frontend
+} // lyx