mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-07 02:28:35 +00:00
79f11f4e7d
This was made visible by aab1b145a5, since xhtml export for
lib/doc/Additional.lyx caused an exception. However, the cause for this was
already present earlier: All attempts to output a std::string to an
odocstream resulted in trying to change the encoding of the stream instead,
since there is no operator<<(odocstream &, std::string) defined, and an
implicit conversion to SetEnc happened instead.
This is fixed by making the SetEnc constructor explicit and adjusting all
code parts that did not compile anymore after that. The parts of the code
that did use the wrong output operator were the std::string version of
htmlize() from output_xhtml.cpp and all changed parts in the other .cpp files.
I also removed the std::string versions of html::htmlize() and
html::cleanAttr(), since it was difficult to see which encodings were used
with these. Now we are always explcit when using html::cleanAttr() and
html::htmlize().
460 lines
9.0 KiB
C++
460 lines
9.0 KiB
C++
/**
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* \file Length.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Matthias Ettrich
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* \author Lars Gullik Bjønnes
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* \author Jean-Marc Lasgouttes
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* \author Angus Leeming
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* \author John Levon
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* \author Dekel Tsur
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "Length.h"
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#include "LyXRC.h"
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#include "MetricsInfo.h"
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#include "frontends/FontMetrics.h"
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#include "support/docstream.h"
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#include "support/lstrings.h"
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#include <sstream>
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#include <iomanip>
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using namespace std;
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using namespace lyx::support;
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namespace lyx {
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/////////////////////////////////////////////////////////////////////
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//
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// Length
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//
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/////////////////////////////////////////////////////////////////////
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Length::Length()
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: val_(0), unit_(Length::UNIT_NONE)
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{}
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Length::Length(double v, Length::UNIT u)
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: val_(v), unit_(u)
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{}
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Length::Length(string const & data)
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: val_(0), unit_(Length::PT)
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{
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Length tmp;
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if (!isValidLength(data, &tmp))
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return; // should raise an exception
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val_ = tmp.val_;
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unit_ = tmp.unit_;
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}
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string const Length::asString() const
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{
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ostringstream os;
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if (unit_ != UNIT_NONE)
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os << formatFPNumber(val_) << unit_name[unit_]; // setw?
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return os.str();
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}
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docstring const Length::asDocstring() const
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{
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odocstringstream os;
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if (unit_ != UNIT_NONE)
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os << from_ascii(formatFPNumber(val_))
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<< from_ascii(unit_name[unit_]); // setw?
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return os.str();
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}
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string const Length::asLatexString() const
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{
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ostringstream os;
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// Do not allow scientific notation (e.g. 1.2e+03), since this is not valid
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// LaTeX (bug 9416)
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switch (unit_) {
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case PTW:
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os << formatFPNumber(val_ / 100.0) << "\\textwidth";
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break;
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case PCW:
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os << formatFPNumber(val_ / 100.0) << "\\columnwidth";
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break;
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case PPW:
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os << formatFPNumber(val_ / 100.0) << "\\paperwidth";
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break;
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case PLW:
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os << formatFPNumber(val_ / 100.0) << "\\linewidth";
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break;
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case PTH:
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os << formatFPNumber(val_ / 100.0) << "\\textheight";
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break;
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case PPH:
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os << formatFPNumber(val_ / 100.0) << "\\paperheight";
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break;
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case UNIT_NONE:
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break;
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default:
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os << formatFPNumber(val_) << unit_name[unit_];
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break;
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}
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return os.str();
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}
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string const Length::asHTMLString() const
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{
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ostringstream os;
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switch (unit_) {
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case PT:
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case BP:
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case DD:
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// close enough
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os << formatFPNumber(val_) << "pt";
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break;
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case MM:
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case CM:
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case PC:
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case IN:
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case EX:
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case EM:
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os << formatFPNumber(val_) << unit_name[unit_];
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break;
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case CC:
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os << formatFPNumber(val_ / 12.0) << "pt";
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break;
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case MU:
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os << formatFPNumber(val_ / 18.0) << "em";
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break;
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case PTW:
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case PPW:
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case PLW:
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case PCW:
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case PTH:
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case PPH:
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// what it's a percentage of probably won't make sense for HTML,
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// so we'll assume people have chosen these appropriately
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os << formatFPNumber(val_) << '%';
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break;
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case SP:
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case UNIT_NONE:
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break;
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}
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return os.str();
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}
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double Length::value() const
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{
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return val_;
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}
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Length::UNIT Length::unit() const
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{
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return unit_;
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}
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void Length::value(double v)
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{
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val_ = v;
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}
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void Length::unit(Length::UNIT u)
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{
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unit_ = u;
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}
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bool Length::zero() const
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{
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return val_ == 0.0;
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}
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bool Length::empty() const
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{
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return unit_ == Length::UNIT_NONE;
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}
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int Length::inPixels(int text_width, int em_width_base) const
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{
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// Zoom factor specified by user in percent
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double const zoom = lyxrc.zoom / 100.0; // [percent]
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// DPI setting for monitor: pixels/inch
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double const dpi = lyxrc.dpi; // screen resolution [pixels/inch]
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double const em_width_in = (em_width_base > 0)
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? em_width_base / (zoom * dpi)
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: 10.0/72.27;
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// A different estimate for em_width is
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// theFontMetrics(FontInfo(sane_font)).em()
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// but this estimate might not be more accurate as the screen font
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// is different then the latex font.
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// Pixel values are scaled so that the ratio
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// between lengths and font sizes on the screen
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// is the same as on paper.
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double const text_width_in = text_width / (zoom * dpi);
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double const result = zoom * dpi * inInch(text_width_in, em_width_in);
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return static_cast<int>(result + ((result >= 0) ? 0.5 : -0.5));
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}
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double Length::inInch(double text_width, double em_width) const
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{
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double result = 0.0;
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switch (unit_) {
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case Length::SP:
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// Scaled point: sp = 1/65536 pt
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result = val_ / (72.27 * 65536); // 4736286.7
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break;
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case Length::PT:
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// Point: 1 pt = 1/72.27 inch
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result = val_ / 72.27; // 72.27
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break;
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case Length::BP:
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// Big point: 1 bp = 1/72 inch
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result = val_ / 72; // 72
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break;
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case Length::DD:
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// Didot: 1157dd = 1238 pt?
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result = val_ / (72.27 / (0.376 * 2.845)); // 67.559735
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break;
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case Length::MM:
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// Millimeter: 1 mm = 1/25.4 inch
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result = val_ / 25.4; // 25.4
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break;
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case Length::PC:
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// Pica: 1 pc = 12 pt
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result = val_ / (72.27 / 12); // 6.0225
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break;
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case Length::CC:
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// Cicero: 1 cc = 12 dd
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result = val_
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/ (72.27 / (12 * 0.376 * 2.845)); // 5.6299779
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break;
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case Length::CM:
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// Centimeter: 1 cm = 1/2.54 inch
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result = val_ / 2.54; // 2.54
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break;
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case Length::IN:
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// Inch
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result = val_;
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break;
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case Length::EX:
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// Ex: The height of an "x"
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// 0.4305 is the ration between 1ex and 1em in cmr10
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result = val_ * em_width * 0.4305;
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break;
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case Length::EM:
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// Em: The width of an "m"
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result = val_ * em_width;
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break;
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case Length::MU:
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// math unit = 1/18em
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result = val_ * em_width / 18;
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break;
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case Length::PCW: // Always % of workarea
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case Length::PTW:
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case Length::PLW:
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result = val_ * text_width / 100;
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break;
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case Length::PPW:
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// paperwidth/textwidth is 1.7 for A4 paper with default margins
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result = val_ * text_width * 1.7 / 100;
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break;
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case Length::PTH:
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result = val_ * text_width * 1.787 / 100;
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break;
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case Length::PPH:
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result = val_ * text_width * 2.2 / 100;
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break;
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case Length::UNIT_NONE:
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result = 0; // this cannot happen
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break;
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}
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return result;
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}
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int Length::inPixels(MetricsBase const & base) const
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{
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return inPixels(base.textwidth, theFontMetrics(base.font).em());
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}
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int Length::inBP() const
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{
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// return any Length value as a one with
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// the PostScript point, called bp (big points)
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double const text_width_in = 210.0 / 2.54; // assume A4
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double const em_width_in = 10.0 / 72.27;
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double result = 72.0 * inInch(text_width_in, em_width_in);
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return static_cast<int>(result + 0.5);
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}
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Length::UNIT Length::defaultUnit()
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{
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return lyxrc.default_length_unit;
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}
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bool operator==(Length const & l1, Length const & l2)
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{
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return l1.value() == l2.value() && l1.unit() == l2.unit();
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}
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bool operator!=(Length const & l1, Length const & l2)
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{
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return !(l1 == l2);
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}
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/////////////////////////////////////////////////////////////////////
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//
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// GlueLength
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//
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/////////////////////////////////////////////////////////////////////
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GlueLength::GlueLength(Length const & len)
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: len_(len)
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{}
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GlueLength::GlueLength(Length const & len, Length const & plus,
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Length const & minus)
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: len_(len), plus_(plus), minus_(minus)
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{}
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GlueLength::GlueLength(string const & data)
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{
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isValidGlueLength(data, this);
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}
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string const GlueLength::asString() const
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{
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if (len_.empty())
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return string();
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ostringstream buffer;
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buffer << formatFPNumber(len_.value());
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if (plus_.zero() && minus_.zero()) {
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buffer << unit_name[len_.unit()];
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return buffer.str();
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}
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// just len and plus
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if (minus_.zero()) {
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if (len_.unit() != plus_.unit())
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buffer << unit_name[len_.unit()];
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buffer << '+' << formatFPNumber(plus_.value());
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buffer << unit_name[plus_.unit()];
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return buffer.str();
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}
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// just len and minus
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if (plus_.zero()) {
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if (len_.unit() != minus_.unit())
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buffer << unit_name[len_.unit()];
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buffer << '-' << formatFPNumber(minus_.value());
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buffer << unit_name[minus_.unit()];
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return buffer.str();
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}
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// ok, len, plus AND minus
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// len+-
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if (minus_ == plus_) {
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if (len_.unit() != minus_.unit())
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buffer << unit_name[len_.unit()];
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buffer << "+-" << formatFPNumber(minus_.value());
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buffer << unit_name[minus_.unit()];
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return buffer.str();
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}
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// this is so rare a case, why bother minimising units ?
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buffer << unit_name[len_.unit()];
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buffer << '+' << formatFPNumber(plus_.value()) << unit_name[plus_.unit()];
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buffer << '-' << formatFPNumber(minus_.value()) << unit_name[minus_.unit()];
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return buffer.str();
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}
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string const GlueLength::asLatexString() const
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{
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ostringstream buffer;
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// use Length::asLatexString() to handle also the percent lengths
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buffer << len_.Length::asLatexString();
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if (!plus_.zero())
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buffer << " plus " << plus_.Length::asLatexString();
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if (!minus_.zero())
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buffer << " minus " << minus_.Length::asLatexString();
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return buffer.str();
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}
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Length const & GlueLength::len() const
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{
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return len_;
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}
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Length const & GlueLength::plus() const
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{
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return plus_;
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}
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Length const & GlueLength::minus() const
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{
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return minus_;
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}
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bool operator==(GlueLength const & l1, GlueLength const & l2)
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{
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return l1.len() == l2.len()
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&& l1.plus() == l2.plus()
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&& l1.minus() == l2.minus();
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}
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bool operator!=(GlueLength const & l1, GlueLength const & l2)
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{
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return !(l1 == l2);
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}
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} // namespace lyx
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