#include "qt_helpers.h"
-#include "Language.h"
#include "Dimension.h"
+#include "Language.h"
+#include "LyXRC.h"
#include "insets/Inset.h"
#include "support/lassert.h"
+#include <QTextLayout>
+
using namespace std;
+using namespace lyx::support;
namespace lyx {
namespace frontend {
+namespace {
/**
* Convert a UCS4 character into a QChar.
* This is a hack (it does only make sense for the common part of the UCS4
* and UTF16 encodings) and should not be used.
* This does only exist because of performance reasons (a real conversion
* using iconv is too slow on windows).
- */
-static inline QChar const ucs4_to_qchar(char_type const ucs4)
+ *
+ * This is no real conversion but a simple cast in reality. This is the reason
+ * why this works well for symbol fonts used in mathed too, even though
+ * these are not real ucs4 characters. These are codepoints in the
+ * computer modern fonts used, nothing unicode related.
+ * See comment in GuiPainter::text() for more explanation.
+ **/
+inline QChar const ucs4_to_qchar(char_type const ucs4)
{
- LASSERT(is_utf16(ucs4), /**/);
+ LATTEST(is_utf16(ucs4));
return QChar(static_cast<unsigned short>(ucs4));
}
+} // anon namespace
-// Caution: When using ucs4_to_qchar() in these methods, this is no
-// real conversion but a simple cast in reality. This is the reason
-// why this works well for symbol fonts used in mathed too, even though
-// these are not real ucs4 characters. These are codepoints in the
-// modern fonts used, nothing unicode related.
-// See comment in QLPainter::text() for more explanation.
-
-GuiFontMetrics::GuiFontMetrics(QFont const & font)
-: metrics_(font), smallcaps_metrics_(font), smallcaps_shape_(false)
-{
-}
-
-
-GuiFontMetrics::GuiFontMetrics(QFont const & font, QFont const & smallcaps_font)
-: metrics_(font), smallcaps_metrics_(smallcaps_font), smallcaps_shape_(true)
+GuiFontMetrics::GuiFontMetrics(QFont const & font) : font_(font), metrics_(font, 0)
{
}
}
+int GuiFontMetrics::em() const
+{
+ return QFontInfo(font_).pixelSize();
+}
+
+
+int GuiFontMetrics::lineWidth() const
+{
+ return metrics_.lineWidth();
+}
+
+
+int GuiFontMetrics::underlinePos() const
+{
+ return metrics_.underlinePos();
+}
+
+
+int GuiFontMetrics::strikeoutPos() const
+{
+ return metrics_.strikeOutPos();
+}
+
+
int GuiFontMetrics::lbearing(char_type c) const
{
if (!is_utf16(c))
- // FIXME: QFontMetrics::leftBearingdoes not support the
+ // FIXME: QFontMetrics::leftBearing does not support the
// full unicode range. Once it does, we could use:
- //return metrics_.leftBearing(toqstr(docstring(1,c)));
+ //return metrics_.leftBearing(toqstr(docstring(1, c)));
return 0;
return metrics_.leftBearing(ucs4_to_qchar(c));
} else {
// FIXME: QFontMetrics::leftBearing does not support the
// full unicode range. Once it does, we could use:
- // metrics_.rightBearing(toqstr(docstring(1,c)));
+ // metrics_.rightBearing(toqstr(docstring(1, c)));
value = width(c);
}
}
-int GuiFontMetrics::smallcapsWidth(char_type c) const
-{
- // FIXME: Optimisation probably needed: we don't use the width cache.
- if (is_utf16(c)) {
- QChar const qc = ucs4_to_qchar(c);
- QChar const uc = qc.toUpper();
- if (qc != uc)
- return smallcaps_metrics_.width(uc);
- else
- return metrics_.width(qc);
- } else {
- QString const s = toqstr(docstring(1,c));
- QString const us = s.toUpper();
- if (s != us)
- return smallcaps_metrics_.width(us);
- else
- return metrics_.width(s);
- }
-}
-
-
int GuiFontMetrics::width(docstring const & s) const
{
- size_t ls = s.size();
int w = 0;
- for (unsigned int i = 0; i < ls; ++i) {
- //FIXME: we need to detect surrogate pairs and act accordingly
- /**
- if isSurrogateBase(s[i]) {
- docstring c = s[i];
- if (smallcaps_shape_)
- w += metrics_.width(toqstr(c + s[i + 1]));
- else
- w += smallcaps_metrics_.width(toqstr(c + s[i + 1]));
- ++i;
- }
- else
- */
- w += width(s[i]);
+ map<docstring, int>::const_iterator it = strwidth_cache_.find(s);
+ if (it != strwidth_cache_.end()) {
+ w = it->second;
+ } else {
+ w = metrics_.width(toqstr(s));
+ strwidth_cache_[s] = w;
}
-
return w;
}
return width(s);
}
+namespace {
+void setTextLayout(QTextLayout & tl, docstring const & s, QFont font,
+ bool const rtl, double const wordspacing)
+{
+ tl.setText(toqstr(s));
+ font.setWordSpacing(wordspacing);
+ tl.setFont(font);
+ // Note that both setFlags and the enums are undocumented
+ tl.setFlags(rtl ? Qt::TextForceRightToLeft : Qt::TextForceLeftToRight);
+ tl.beginLayout();
+ tl.createLine();
+ tl.endLayout();
+}
+}
+
+
+int GuiFontMetrics::pos2x(docstring const & s, int const pos, bool const rtl,
+ double const wordspacing) const
+{
+ QTextLayout tl;
+ QFont copy = font_;
+ copy.setWordSpacing(wordspacing);
+ setTextLayout(tl, s, font_, rtl, wordspacing);
+ return static_cast<int>(tl.lineForTextPosition(pos).cursorToX(pos));
+}
+
+
+int GuiFontMetrics::x2pos(docstring const & s, int & x, bool const rtl,
+ double const wordspacing) const
+{
+ QTextLayout tl;
+ setTextLayout(tl, s, font_, rtl, wordspacing);
+ int pos = tl.lineForTextPosition(0).xToCursor(x);
+ // correct x value to the actual cursor position.
+ x = static_cast<int>(tl.lineForTextPosition(0).cursorToX(pos));
+ return pos;
+}
+
+
+bool GuiFontMetrics::breakAt(docstring & s, int & x, bool const rtl, bool const force) const
+{
+ if (s.empty())
+ return false;
+ QTextLayout tl;
+ tl.setText(toqstr(s));
+ tl.setFont(font_);
+ // Note that both setFlags and the enums are undocumented
+ tl.setFlags(rtl ? Qt::TextForceRightToLeft : Qt::TextForceLeftToRight);
+ QTextOption to;
+ to.setWrapMode(force ? QTextOption::WrapAnywhere : QTextOption::WordWrap);
+ tl.setTextOption(to);
+ tl.beginLayout();
+ QTextLine line = tl.createLine();
+ line.setLineWidth(x);
+ tl.createLine();
+ tl.endLayout();
+ if (int(line.naturalTextWidth()) > x)
+ return false;
+ x = int(line.naturalTextWidth());
+ s = s.substr(0, line.textLength());
+ return true;
+}
+
void GuiFontMetrics::rectText(docstring const & str,
int & w, int & ascent, int & descent) const
if (is_utf16(c))
r = metrics_.boundingRect(ucs4_to_qchar(c));
else
- r = metrics_.boundingRect(toqstr(docstring(1,c)));
+ r = metrics_.boundingRect(toqstr(docstring(1, c)));
AscendDescend ad = { -r.top(), r.bottom() + 1};
// We could as well compute the width but this is not really
int GuiFontMetrics::width(char_type c) const
{
- if (smallcaps_shape_)
- return smallcapsWidth(c);
-
int value = width_cache_.value(c, outOfLimitMetric);
if (value != outOfLimitMetric)
return value;
int GuiFontMetrics::ascent(char_type c) const
{
- static AscendDescend const outOfLimitAD =
+ static AscendDescend const outOfLimitAD =
{outOfLimitMetric, outOfLimitMetric};
AscendDescend value = metrics_cache_.value(c, outOfLimitAD);
if (value.ascent != outOfLimitMetric)
int GuiFontMetrics::descent(char_type c) const
{
- static AscendDescend const outOfLimitAD =
+ static AscendDescend const outOfLimitAD =
{outOfLimitMetric, outOfLimitMetric};
AscendDescend value = metrics_cache_.value(c, outOfLimitAD);
if (value.descent != outOfLimitMetric)