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 ||
51 oldLength.find("height%") != string::npos)
54 return subst(oldLength,"t%","text%");
56 } else if (oldLength.find("l%") != string::npos) {
57 if (oldLength.find("col%") != string::npos)
60 return subst(oldLength,"l%","line%");
62 } else if (oldLength.find("p%") != string::npos)
63 return subst(oldLength,"p%","page%");
70 LyXLength::LyXLength(string const & data)
71 : val_(0), unit_(LyXLength::PT)
75 #ifndef NO_PEXTRA_REALLY
76 // this is needed for 1.1.x minipages with width like %t
77 if (!isValidLength (convertOldRelLength(data), &tmp))
79 if (!isValidLength (data, &tmp))
81 if (!isValidLength (convertOldRelLength(data), &tmp))
82 return; // should raise an exception
89 string const LyXLength::asString() const
92 buffer << val_ << unit_name[unit_]; // setw?
93 return buffer.str().c_str();
97 string const LyXLength::asLatexString() const
102 buffer << abs(static_cast<int>(val_/100)) << "."
103 << abs(static_cast<int>(val_)%100) << "\\textwidth";
106 buffer << abs(static_cast<int>(val_/100)) << "."
107 << abs(static_cast<int>(val_)%100) << "\\columnwidth";
110 buffer << abs(static_cast<int>(val_/100)) << "."
111 << abs(static_cast<int>(val_)%100) << "\\paperwidth";
114 buffer << abs(static_cast<int>(val_/100)) << "."
115 << abs(static_cast<int>(val_)%100) << "\\linewidth";
118 buffer << abs(static_cast<int>(val_/100)) << "."
119 << abs(static_cast<int>(val_)%100) << "\\paperheight";
122 buffer << abs(static_cast<int>(val_/100)) << "."
123 << abs(static_cast<int>(val_)%100) << "\\textheight";
126 buffer << val_ << unit_name[unit_]; // setw?
129 return buffer.str().c_str();
133 double LyXLength::value() const
139 LyXLength::UNIT LyXLength::unit() const
145 void LyXLength::value(double v)
151 void LyXLength::unit(LyXLength::UNIT u)
157 bool LyXLength::zero() const
163 int LyXLength::inPixels(int default_width, int default_height) const
165 // Zoom factor specified by user in percent
166 double const zoom = lyxrc.zoom / 100.0; // [percent]
168 // DPI setting for monitor: pixels/inch
169 double const dpi = lyxrc.dpi; // screen resolution [pixels/inch]
171 // Pixel values are scaled so that the ratio
172 // between lengths and font sizes on the screen
173 // is the same as on paper.
175 // we don't care about sign of value, we
176 // display negative space with text too
178 #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')
182 int val_sign = val_ < 0.0 ? -1 : 1;
186 // Scaled point: sp = 1/65536 pt
187 result = zoom * dpi * val_
188 / (72.27 * 65536); // 4736286.7
191 // Point: 1 pt = 1/72.27 inch
192 result = zoom * dpi * val_
196 // Big point: 1 bp = 1/72 inch
197 result = zoom * dpi * val_
201 // Didot: 1157dd = 1238 pt?
202 result = zoom * dpi * val_
203 / (72.27 / (0.376 * 2.845)); // 67.559735
206 // Millimeter: 1 mm = 1/25.4 inch
207 result = zoom * dpi * val_
211 // Pica: 1 pc = 12 pt
212 result = zoom * dpi * val_
213 / (72.27 / 12); // 6.0225
216 // Cicero: 1 cc = 12 dd
217 result = zoom * dpi * val_
218 / (72.27 / (12 * 0.376 * 2.845)); // 5.6299779
221 // Centimeter: 1 cm = 1/2.54 inch
222 result = zoom * dpi * val_
227 result = zoom * dpi * val_;
230 // Ex: The height of an "x"
231 result = zoom * val_ * default_height / 2; // what to / width?
233 case LyXLength::EM: // what to / width?
234 // Em: The width of an "m"
235 result = zoom * val_ * default_height / 2; // Why 2?
237 case LyXLength::MU: // This is probably only allowed in
239 result = zoom * val_ * default_height;
241 case LyXLength::PW: // Always % of workarea
245 result = val_ * default_width / 100;
249 result = val_ * default_height / 100;
251 case LyXLength::UNIT_NONE:
252 result = 0; // this cannot happen
255 return static_cast<int>(result * val_sign + 0.5);
259 int LyXLength::inBP() const
261 // return any LyXLength value as a one with
262 // the PostScript point, called bp (big points)
267 result = val_ * 28.346;
271 result = val_ * 2.8346;
275 result = val_ * 72.0;
278 // no other than bp possible
282 return static_cast<int>(result + 0.5);
286 bool operator==(LyXLength const & l1, LyXLength const & l2)
288 return l1.value() == l2.value() && l1.unit() == l2.unit();
292 bool operator!=(LyXLength const & l1, LyXLength const & l2)