fix typo that put too many include paths for most people

[lyx.git] / src / lyxlength.C

diff --git a/src/lyxlength.C b/src/lyxlength.C
index de47765b932238ab903ad595036697c58ba19eac..1067ac7a75f373bced679b6d43495c10404727a1 100644 (file)
--- a/src/lyxlength.C
+++ b/src/lyxlength.C
@@ -2,7 +2,7 @@
  * ======================================================
  *
  *           LyX, The Document Processor
- *     
+ *
  *           Copyright 1995 Matthias Ettrich
  *           Copyright 1995-2001 The LyX Team.
  *
@@ -16,35 +16,12 @@
 
 #include "lyxlength.h"
 #include "lengthcommon.h"
+#include "lyxrc.h"
 
 #include "Lsstream.h"
 
 #include <cstdlib>
 
-#if 0
-namespace {
-// this is now here and in lyxgluelength.C
-
-int const num_units = LyXLength::UNIT_NONE;
-
-// I am not sure if "mu" should be possible to select (Lgb)
-char const * unit_name[num_units] = { "sp", "pt", "bp", "dd",
-                                     "mm", "pc", "cc", "cm",
-                                     "in", "ex", "em", "mu",
-                                     "%",  "c%", "p%", "l%" };
-
-
-LyXLength::UNIT unitFromString(string const & data)
-{
-       int i = 0;
-       while (i < num_units && data != unit_name[i])
-               ++i;
-       return static_cast<LyXLength::UNIT>(i);
-}
-
-}
-#endif
-
 
 LyXLength::LyXLength()
        : val_(0), unit_(LyXLength::PT)
@@ -57,9 +34,10 @@ LyXLength::LyXLength(double v, LyXLength::UNIT u)
 
 
 LyXLength::LyXLength(string const & data)
+       : val_(0), unit_(LyXLength::PT)
 {
        LyXLength tmp;
-       
+
        if (!isValidLength (data, &tmp))
                return; // should raise an exception
 
@@ -79,15 +57,18 @@ string const LyXLength::asString() const
 string const LyXLength::asLatexString() const
 {
        ostringstream buffer;
-       switch(unit_) {
+       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) << "\\pagewidth";
+                  << abs(static_cast<int>(val_)%100) << "\\paperwidth";
            break;
        case PL:
            buffer << abs(static_cast<int>(val_/100)) << "."
@@ -125,13 +106,107 @@ void LyXLength::unit(LyXLength::UNIT u)
 }
 
 
-bool LyXLength::zero() const 
+bool LyXLength::zero() const
 {
        return val_ == 0.0;
 }
 
 
+int LyXLength::inPixels(int default_width, int default_height) 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]
+
+       // 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:
+               // Scaled point: sp = 1/65536 pt
+               result = zoom * dpi * val_
+                       / (72.27 * 65536); // 4736286.7
+               break;
+       case LyXLength::PT:
+               // Point: 1 pt = 1/72.27 inch
+               result = zoom * dpi * val_
+                       / 72.27; // 72.27
+               break;
+       case LyXLength::BP:
+               // Big point: 1 bp = 1/72 inch
+               result = zoom * dpi * val_
+                       / 72; // 72
+               break;
+       case LyXLength::DD:
+               // Didot: 1157dd = 1238 pt?
+               result = zoom * dpi * val_
+                       / (72.27 / (0.376 * 2.845)); // 67.559735
+               break;
+       case LyXLength::MM:
+               // Millimeter: 1 mm = 1/25.4 inch
+               result = zoom * dpi * val_
+                       / 25.4; // 25.4
+               break;
+       case LyXLength::PC:
+               // Pica: 1 pc = 12 pt
+               result = zoom * dpi * val_
+                       / (72.27 / 12); // 6.0225
+               break;
+       case LyXLength::CC:
+               // Cicero: 1 cc = 12 dd
+               result = zoom * dpi * val_
+                       / (72.27 / (12 * 0.376 * 2.845)); // 5.6299779
+               break;
+       case LyXLength::CM:
+               // Centimeter: 1 cm = 1/2.54 inch
+               result = zoom * dpi * val_
+                       / 2.54; // 2.54
+               break;
+       case LyXLength::IN:
+               // Inch
+               result = zoom * dpi * val_;
+               break;
+       case LyXLength::EX:
+               // Ex: The height of an "x"
+               result = zoom * val_ * default_height / 2; // what to / width?
+               break;
+       case LyXLength::EM: // what to / width?
+               // Em: The width of an "m"
+               result = zoom * val_ * default_height / 2; // Why 2?
+               break;
+       case LyXLength::MU: // This is probably only allowed in
+               // math mode
+               result = zoom * val_ * default_height;
+               break;
+       case LyXLength::PW: // Always % of workarea
+       case LyXLength::PE:
+       case LyXLength::PP:
+       case LyXLength::PL:
+               result = val_ * default_width / 100;
+               break;
+       case LyXLength::UNIT_NONE:
+               result = 0;  // this cannot happen
+               break;
+       }
+       return static_cast<int>(result * val_sign + 0.5);
+}
+
+
 bool operator==(LyXLength const & l1, LyXLength const & l2)
 {
        return l1.value() == l2.value() && l1.unit() == l2.unit();
 }
+
+
+bool operator!=(LyXLength const & l1, LyXLength const & l2)
+{
+       return !(l1 == l2);
+}