-/* This file is part of
- * ======================================================
+/**
+ * \file lyxlength.C
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
*
- * LyX, The Document Processor
+ * \author Matthias Ettrich
+ * \author Lars Gullik Bjønnes
+ * \author Jean-Marc Lasgouttes
+ * \author Angus Leeming
+ * \author John Levon
+ * \author Dekel Tsur
*
- * Copyright 1995 Matthias Ettrich
- * Copyright 1995-2001 The LyX Team.
- *
- * ====================================================== */
+ * Full author contact details are available in file CREDITS.
+ */
#include <config.h>
-#ifdef __GNUG__
-#pragma implementation
-#endif
-
#include "lyxlength.h"
#include "lengthcommon.h"
#include "lyxrc.h"
-#include "support/lstrings.h"
+#include <sstream>
+#include <iomanip>
-#include "Lsstream.h"
-#include <cstdlib>
+using std::ostringstream;
+using std::string;
-using std::abs;
LyXLength::LyXLength()
- : val_(0), unit_(LyXLength::PT)
+ : val_(0), unit_(LyXLength::UNIT_NONE)
{}
{}
-#ifndef NO_PEXTRA_REALLY
-// compatibility stuff < version 1.2.0pre and for
-// "old" 1.2.0 files before the pre
-namespace {
-string const convertOldRelLength(string const & oldLength)
-{
- // we can have only one or none of the following
- if (oldLength.find("c%") != string::npos) {
- return subst(oldLength,"c%","col%");
-
- } else if (oldLength.find("t%") != string::npos) {
- if (oldLength.find("text%") != string::npos)
- return oldLength;
- else
- return subst(oldLength,"t%","text%");
-
- } else if (oldLength.find("l%") != string::npos) {
- if (oldLength.find("col%") != string::npos)
- return oldLength;
- else
- return subst(oldLength,"l%","line%");
-
- } else if (oldLength.find("p%") != string::npos)
- return subst(oldLength,"p%","page%");
-
- return oldLength;
-}
-} // end anon
-#endif
-
LyXLength::LyXLength(string const & data)
: val_(0), unit_(LyXLength::PT)
{
LyXLength tmp;
-#ifndef NO_PEXTRA_REALLY
- // this is needed for 1.1.x minipages with width like %t
- if (!isValidLength (convertOldRelLength(data), &tmp))
-#else
- if (!isValidLength (data, &tmp))
-#endif
- if (!isValidLength (convertOldRelLength(data), &tmp))
+ if (!isValidLength(data, &tmp))
return; // should raise an exception
val_ = tmp.val_;
string const LyXLength::asString() const
{
- ostringstream buffer;
- buffer << val_ << unit_name[unit_]; // setw?
- return buffer.str().c_str();
+ ostringstream os;
+ os << val_ << unit_name[unit_]; // setw?
+ return os.str();
}
string const LyXLength::asLatexString() const
{
- ostringstream buffer;
+ ostringstream os;
switch (unit_) {
- case PW:
- buffer << abs(static_cast<int>(val_/100)) << "."
- << abs(static_cast<int>(val_)%100) << "\\textwidth";
- break;
- case PE:
- buffer << abs(static_cast<int>(val_/100)) << "."
- << abs(static_cast<int>(val_)%100) << "\\columnwidth";
- break;
- case PP:
- buffer << abs(static_cast<int>(val_/100)) << "."
- << abs(static_cast<int>(val_)%100) << "\\paperwidth";
- break;
- case PL:
- buffer << abs(static_cast<int>(val_/100)) << "."
- << abs(static_cast<int>(val_)%100) << "\\linewidth";
- break;
+ case PTW:
+ os << val_ / 100.0 << "\\textwidth";
+ break;
+ case PCW:
+ os << val_ / 100.0 << "\\columnwidth";
+ break;
+ case PPW:
+ os << val_ / 100.0 << "\\paperwidth";
+ break;
+ case PLW:
+ os << val_ / 100.0 << "\\linewidth";
+ break;
+ case PPH:
+ os << val_ / 100.0 << "\\paperheight";
+ break;
+ case PTH:
+ os << val_ / 100.0 << "\\textheight";
+ break;
default:
- buffer << val_ << unit_name[unit_]; // setw?
- break;
+ os << val_ << unit_name[unit_];
+ break;
}
- return buffer.str().c_str();
+ return os.str();
}
}
-int LyXLength::inPixels(int default_width, int default_height) const
+bool LyXLength::empty() const
+{
+ return unit_ == LyXLength::UNIT_NONE;
+}
+
+
+int LyXLength::inPixels(int text_width, int em_width_base) const
{
// Zoom factor specified by user in percent
double const zoom = lyxrc.zoom / 100.0; // [percent]
// DPI setting for monitor: pixels/inch
double const dpi = lyxrc.dpi; // screen resolution [pixels/inch]
+ double const em_width = (em_width_base > 0)
+ ? em_width_base
+ : 10*(dpi/72.27)*zoom;
+ // A different estimate for em_width is
+ // font_metrics::width('M', LyXFont(LyXFont::ALL_SANE))
+ // but this estimate might not be more accurate as the screen font
+ // is different then the latex font.
+
// Pixel values are scaled so that the ratio
// between lengths and font sizes on the screen
// is the same as on paper.
- // we don't care about sign of value, we
- // display negative space with text too
double result = 0.0;
- int val_sign = val_ < 0.0 ? -1 : 1;
switch (unit_) {
case LyXLength::SP:
break;
case LyXLength::EX:
// Ex: The height of an "x"
- result = zoom * val_ * default_height / 2; // what to / width?
+ // 0.4305 is the ration between 1ex and 1em in cmr10
+ result = val_ * em_width * 0.4305;
break;
- case LyXLength::EM: // what to / width?
+ case LyXLength::EM:
// Em: The width of an "m"
- result = zoom * val_ * default_height / 2; // Why 2?
+ result = val_ * em_width;
+ break;
+ case LyXLength::MU:
+ // math unit = 1/18em
+ result = val_ * em_width / 18;
+ break;
+ case LyXLength::PCW: // Always % of workarea
+ case LyXLength::PTW:
+ case LyXLength::PLW:
+ result = val_ * text_width / 100;
+ break;
+ case LyXLength::PPW:
+ // paperwidth/textwidth is 1.7 for A4 paper with default margins
+ result = val_ * text_width * 1.7 / 100;
break;
- case LyXLength::MU: // This is probably only allowed in
- // math mode
- result = zoom * val_ * default_height;
+ case LyXLength::PTH:
+ result = val_ * text_width * 1.787 / 100;
break;
- case LyXLength::PW: // Always % of workarea
- case LyXLength::PE:
- case LyXLength::PP:
- case LyXLength::PL:
- result = val_ * default_width / 100;
+ case LyXLength::PPH:
+ result = val_ * text_width * 2.2 / 100;
break;
case LyXLength::UNIT_NONE:
result = 0; // this cannot happen
break;
}
- return static_cast<int>(result * val_sign + 0.5);
+ return static_cast<int>(result + ((result >= 0) ? 0.5 : -0.5));
}
// return any LyXLength value as a one with
// the PostScript point, called bp (big points)
double result = 0.0;
- int val_sign = val_ < 0.0 ? -1 : 1;
switch (unit_) {
case LyXLength::CM:
// 1bp = 0.2835cm
result = val_;
break;
}
- return static_cast<int>(result * val_sign + 0.5);
+ return static_cast<int>(result + 0.5);
}
projects / lyx.git / blobdiff