#include "language.h"
-#include "frontends/lyx_gui.h"
-
#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)
{
int GuiFontMetrics::maxAscent() const
{
- if (!lyx_gui::use_gui)
- return 1;
return metrics_.ascent();
}
int GuiFontMetrics::maxDescent() const
{
- if (!lyx_gui::use_gui)
- return 1;
// We add 1 as the value returned by QT is different than X
// See http://doc.trolltech.com/2.3/qfontmetrics.html#200b74
return metrics_.descent() + 1;
}
-int GuiFontMetrics::ascent(char_type c) const
-{
- if (!lyx_gui::use_gui)
- return 1;
- QRect const & r = metrics_.boundingRect(ucs4_to_qchar(c));
- // Qt/Win 3.2.1nc (at least) corrects the GetGlyphOutlineA|W y
- // value by the height: (x, -y-height, width, height).
- // Other versions return: (x, -y, width, height)
-#if defined(Q_WS_WIN) && (QT_VERSION == 0x030201)
- return -r.top() - r.height();
-#else
- return -r.top();
-#endif
-}
-
-
-int GuiFontMetrics::descent(char_type c) const
-{
- if (!lyx_gui::use_gui)
- return 1;
- QRect const & r = metrics_.boundingRect(ucs4_to_qchar(c));
- // Qt/Win 3.2.1nc (at least) corrects the GetGlyphOutlineA|W y
- // value by the height: (x, -y-height, width, height).
- // Other versions return: (x, -y, width, height)
-#if defined(Q_WS_WIN) && (QT_VERSION == 0x030201)
- return r.bottom() + r.height() + 1;
-#else
- return r.bottom() + 1;
-#endif
-}
-
-
int GuiFontMetrics::lbearing(char_type c) const
{
- if (!lyx_gui::use_gui)
- return 1;
return metrics_.leftBearing(ucs4_to_qchar(c));
}
int GuiFontMetrics::rbearing(char_type c) const
{
- if (!lyx_gui::use_gui)
- return 1;
-
// Qt rbearing is from the right edge of the char's width().
QChar sc = ucs4_to_qchar(c);
return metrics_.width(sc) - metrics_.rightBearing(sc);
int GuiFontMetrics::smallcapsWidth(QString const & s) const
{
- if (!lyx_gui::use_gui)
- return 1;
-
int w = 0;
int const ls = s.size();
int GuiFontMetrics::width(char_type const * s, size_t ls) const
{
- if (!lyx_gui::use_gui)
- return ls;
+ // Caution: The following ucs4_to_something conversions work for
+ // symbol fonts only because they are no real conversions but simple
+ // casts in reality.
- QString ucs2 = ucs4_to_qstring(s, ls);
+ if (ls == 1 && !smallcaps_shape_) {
+ return width(s[0]);
+ }
- 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(s[i]);
- if (ls == 1)
+ return w;
+}
+
+
+int GuiFontMetrics::width(QString const & ucs2) const
+{
+ int const ls = ucs2.size();
+ if (ls == 1 && !smallcaps_shape_) {
return width(ucs2[0].unicode());
+ }
+
+ if (smallcaps_shape_)
+ return smallcapsWidth(ucs2);
int w = 0;
- for (unsigned int i = 0; i < ls; ++i)
+ for (int i = 0; i < ls; ++i)
w += width(ucs2[i].unicode());
return w;
int GuiFontMetrics::signedWidth(docstring const & s) const
{
+ if (s.empty())
+ return 0;
+
if (s[0] == '-')
- return -FontMetrics::width(s.substr(1, s.length() - 1));
+ return -width(&(s[1]), s.length() - 1);
else
return FontMetrics::width(s);
}
void GuiFontMetrics::buttonText(docstring const & str,
int & w, int & ascent, int & descent) const
{
- QFontMetrics const & m = metrics_;
static int const d = 3;
w = FontMetrics::width(str) + d * 2 + 2;
ascent = metrics_.ascent() + d;
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
{
- GuiFontMetrics::WidthCache::const_iterator cit = widthcache.find(val);
- if (cit != widthcache.end())
- return cit->second;
+ QRect const & r = metrics_.boundingRect(ucs4_to_qchar(c));
+ return -r.top();
+}
- int const w = metrics_.width(QChar(val));
- widthcache[val] = w;
- return w;
+
+int GuiFontMetrics::descent(char_type c) const
+{
+ QRect const & r = metrics_.boundingRect(ucs4_to_qchar(c));
+ return r.bottom() + 1;
}
-#endif
+#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
projects / lyx.git / blobdiff