1 /* This file is part of
2 * ======================================================
4 * LyX, The Document Processor
6 * Copyright 1995 Matthias Ettrich
7 * Copyright 1995-2001 The LyX Team.
9 * ====================================================== */
14 #pragma implementation
17 #include "lyxlength.h"
18 #include "lengthcommon.h"
21 #include "support/lstrings.h"
29 LyXLength::LyXLength()
30 : val_(0), unit_(LyXLength::PT)
34 LyXLength::LyXLength(double v, LyXLength::UNIT u)
39 #ifndef NO_PEXTRA_REALLY
40 // compatibility stuff < version 1.2.0pre and for
41 // "old" 1.2.0 files before the pre
43 string const convertOldRelLength(string const & oldLength)
45 // we can have only one or none of the following
46 if (oldLength.find("c%") != string::npos) {
47 return subst(oldLength,"c%","col%");
49 } else if (oldLength.find("t%") != string::npos) {
50 if (oldLength.find("text%") != string::npos)
53 return subst(oldLength,"t%","text%");
55 } else if (oldLength.find("l%") != string::npos) {
56 if (oldLength.find("col%") != string::npos)
59 return subst(oldLength,"l%","line%");
61 } else if (oldLength.find("p%") != string::npos)
62 return subst(oldLength,"p%","page%");
69 LyXLength::LyXLength(string const & data)
70 : val_(0), unit_(LyXLength::PT)
74 #ifndef NO_PEXTRA_REALLY
75 // this is needed for 1.1.x minipages with width like %t
76 if (!isValidLength (convertOldRelLength(data), &tmp))
78 if (!isValidLength (data, &tmp))
80 if (!isValidLength (convertOldRelLength(data), &tmp))
81 return; // should raise an exception
88 string const LyXLength::asString() const
91 buffer << val_ << unit_name[unit_]; // setw?
92 return buffer.str().c_str();
96 string const LyXLength::asLatexString() const
101 buffer << abs(static_cast<int>(val_/100)) << "."
102 << abs(static_cast<int>(val_)%100) << "\\textwidth";
105 buffer << abs(static_cast<int>(val_/100)) << "."
106 << abs(static_cast<int>(val_)%100) << "\\columnwidth";
109 buffer << abs(static_cast<int>(val_/100)) << "."
110 << abs(static_cast<int>(val_)%100) << "\\paperwidth";
113 buffer << abs(static_cast<int>(val_/100)) << "."
114 << abs(static_cast<int>(val_)%100) << "\\linewidth";
117 buffer << val_ << unit_name[unit_]; // setw?
120 return buffer.str().c_str();
124 double LyXLength::value() const
130 LyXLength::UNIT LyXLength::unit() const
136 void LyXLength::value(double v)
142 void LyXLength::unit(LyXLength::UNIT u)
148 bool LyXLength::zero() const
154 int LyXLength::inPixels(int default_width, int default_height) const
156 // Zoom factor specified by user in percent
157 double const zoom = lyxrc.zoom / 100.0; // [percent]
159 // DPI setting for monitor: pixels/inch
160 double const dpi = lyxrc.dpi; // screen resolution [pixels/inch]
162 // Pixel values are scaled so that the ratio
163 // between lengths and font sizes on the screen
164 // is the same as on paper.
166 // we don't care about sign of value, we
167 // display negative space with text too
169 #warning if you don't care than either call this function differently or let it return negative values and call abs() explicitly when needed (Andre')
173 int val_sign = val_ < 0.0 ? -1 : 1;
177 // Scaled point: sp = 1/65536 pt
178 result = zoom * dpi * val_
179 / (72.27 * 65536); // 4736286.7
182 // Point: 1 pt = 1/72.27 inch
183 result = zoom * dpi * val_
187 // Big point: 1 bp = 1/72 inch
188 result = zoom * dpi * val_
192 // Didot: 1157dd = 1238 pt?
193 result = zoom * dpi * val_
194 / (72.27 / (0.376 * 2.845)); // 67.559735
197 // Millimeter: 1 mm = 1/25.4 inch
198 result = zoom * dpi * val_
202 // Pica: 1 pc = 12 pt
203 result = zoom * dpi * val_
204 / (72.27 / 12); // 6.0225
207 // Cicero: 1 cc = 12 dd
208 result = zoom * dpi * val_
209 / (72.27 / (12 * 0.376 * 2.845)); // 5.6299779
212 // Centimeter: 1 cm = 1/2.54 inch
213 result = zoom * dpi * val_
218 result = zoom * dpi * val_;
221 // Ex: The height of an "x"
222 result = zoom * val_ * default_height / 2; // what to / width?
224 case LyXLength::EM: // what to / width?
225 // Em: The width of an "m"
226 result = zoom * val_ * default_height / 2; // Why 2?
228 case LyXLength::MU: // This is probably only allowed in
230 result = zoom * val_ * default_height;
232 case LyXLength::PW: // Always % of workarea
236 result = val_ * default_width / 100;
238 case LyXLength::UNIT_NONE:
239 result = 0; // this cannot happen
242 return static_cast<int>(result * val_sign + 0.5);
246 int LyXLength::inBP() const
248 // return any LyXLength value as a one with
249 // the PostScript point, called bp (big points)
254 result = val_ * 28.346;
258 result = val_ * 2.8346;
262 result = val_ * 72.0;
265 // no other than bp possible
269 return static_cast<int>(result + 0.5);
273 bool operator==(LyXLength const & l1, LyXLength const & l2)
275 return l1.value() == l2.value() && l1.unit() == l2.unit();
279 bool operator!=(LyXLength const & l1, LyXLength const & l2)