-/* This file is part of
- * ======================================================
+/**
+ * \file vspace.C
+ * Copyright 1995-2002 the LyX Team
+ * Read the file COPYING
*
- * LyX, The Document Processor
- *
- * Copyright 1995 Matthias Ettrich
- * Copyright 1995-2001 The LyX Team.
- *
- * ====================================================== */
+ * \author Matthias Ettrich
+ */
#include <config.h>
#include "vspace.h"
#include "lengthcommon.h"
-#include "lyx_main.h"
#include "buffer.h"
#include "lyxrc.h"
-#include "lyxtext.h"
#include "BufferView.h"
+#include "support/LAssert.h"
#include "support/lstrings.h"
#include <cstdio>
+#ifndef CXX_GLOBAL_CSTD
+using std::sscanf;
+#endif
namespace {
-#if 0
-/* length units
- */
-
-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%" };
-
-
-/* The following static items form a simple scanner for
- * length strings, used by isValid[Glue]Length. See comments there.
- */
-double number[4] = { 0, 0, 0, 0 };
-LyXLength::UNIT unit[4] = { LyXLength::UNIT_NONE,
- LyXLength::UNIT_NONE,
- LyXLength::UNIT_NONE,
- LyXLength::UNIT_NONE };
-int number_index;
-int unit_index;
-
-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
-double number[4] = { 0, 0, 0, 0 };
-LyXLength::UNIT unit[4] = { LyXLength::UNIT_NONE,
- LyXLength::UNIT_NONE,
- LyXLength::UNIT_NONE,
- LyXLength::UNIT_NONE };
+/// used to return numeric values in parsing vspace
+double number[4] = { 0, 0, 0, 0 };
+/// used to return unit types in parsing vspace
+LyXLength::UNIT unit[4] = { LyXLength::UNIT_NONE,
+ LyXLength::UNIT_NONE,
+ LyXLength::UNIT_NONE,
+ LyXLength::UNIT_NONE };
+/// the current position in the number array
int number_index;
+/// the current position in the unit array
int unit_index;
+/// skip n characters of input
inline
void lyx_advance(string & data, string::size_type n)
{
data.erase(0, n);
}
-
+/// return true when the input is at the end
inline
bool isEndOfData(string const & data)
{
- return frontStrip(data).empty();
+ return ltrim(data).empty();
}
-
+/**
+ * nextToken - return the next token in the input
+ * @param data input string
+ * @return a char representing the type of token returned
+ *
+ * The possible return values are :
+ * + stretch indicator for glue length
+ * - shrink indicator for glue length
+ * n a numeric value (stored in number array)
+ * u a unit type (stored in unit array)
+ * E parse error
+ */
char nextToken(string & data)
{
- data = frontStrip(data);
+ data = ltrim(data);
if (data.empty())
return '\0';
else if (data[0] == '+') {
if (number_index > 3) return 'E';
string buffer;
-
+
// we have found some number
if (i == string::npos) {
buffer = data;
return 'n';
} else return 'E';
}
-
+
i = data.find_first_not_of("abcdefghijklmnopqrstuvwxyz%");
if (i != 0) {
if (unit_index > 3) return 'E';
string buffer;
-
+
// we have found some alphabetical string
if (i == string::npos) {
buffer = data;
}
+/// latex representation of a vspace
struct LaTeXLength {
char const * pattern;
int plus_val_index;
};
+/// the possible formats for a vspace string
LaTeXLength table[] = {
{ "nu", 0, 0, 0, 0 },
{ "nu+nu", 2, 0, 2, 0 },
if (data.empty())
return true;
- string buffer = frontStrip(data);
+ string buffer = ltrim(data);
// To make isValidGlueLength recognize negative values as
// the first number this little hack is needed:
break;
}
// end of hack
-
+
int pattern_index = 0;
int table_index = 0;
char pattern[20];
if (!*table[table_index].pattern)
return false;
}
-
+
// Get the values from the appropriate places. If an index
// is zero, the corresponding array value is zero or UNIT_NONE,
// so we needn't check this.
bool isValidLength(string const & data, LyXLength * result)
{
- /// This is a trimmed down version of isValidGlueLength.
- /// The parser may seem overkill for lengths without
- /// glue, but since we already have it, using it is
- /// easier than writing something from scratch.
+ // This is a trimmed down version of isValidGlueLength.
+ // The parser may seem overkill for lengths without
+ // glue, but since we already have it, using it is
+ // easier than writing something from scratch.
if (data.empty())
return true;
break;
}
// end of hack
-
+
number_index = unit_index = 1; // entries at index 0 are sentinels
// construct "pattern" from "data"
pattern[pattern_index] = '\0';
// only the most basic pattern is accepted here
- if (compare(pattern, "nu") != 0) return false;
-
+ if (compare(pattern, "nu") != 0) return false;
+
// It _was_ a correct length string.
// Store away the values we found.
if (result) {
if (data.empty())
return;
double value;
- string input = strip(data);
+ string input = rtrim(data);
string::size_type const length = input.length();
- if (length > 1 && input[length-1] == '*') {
+ if (length > 1 && input[length - 1] == '*') {
keep_ = true;
input.erase(length - 1);
}
string const VSpace::asLatexCommand(BufferParams const & params) const
{
+ string ret;
+
switch (kind_) {
- case NONE: return string();
+ case NONE:
+ break;
case DEFSKIP:
- return params.getDefSkip().asLatexCommand(params);
- case SMALLSKIP: return keep_ ? "\\vspace*{\\smallskipamount}"
- : "\\smallskip{}";
- case MEDSKIP: return keep_ ? "\\vspace*{\\medskipamount}"
- : "\\medskip{}";
- case BIGSKIP: return keep_ ? "\\vspace*{\\bigskipamount}"
- : "\\bigskip{}";
- case VFILL: return keep_ ? "\\vspace*{\\fill}"
- : "\\vfill{}";
- case LENGTH: return keep_ ? "\\vspace*{" + len_.asLatexString() + '}'
- : "\\vspace{" + len_.asLatexString() + '}';
+ ret = params.getDefSkip().asLatexCommand(params);
+ break;
+ case SMALLSKIP:
+ ret = keep_ ? "\\vspace*{\\smallskipamount}"
+ : "\\smallskip{}";
+ break;
+ case MEDSKIP:
+ ret = keep_ ? "\\vspace*{\\medskipamount}"
+ : "\\medskip{}";
+ break;
+ case BIGSKIP:
+ ret = keep_ ? "\\vspace*{\\bigskipamount}"
+ : "\\bigskip{}";
+ break;
+ case VFILL:
+ ret = keep_ ? "\\vspace*{\\fill}"
+ : "\\vfill{}";
+ break;
+ case LENGTH:
+ {
+ string const lenstr = len_.asLatexString();
+
+ ret = keep_ ? "\\vspace*{" + lenstr + '}'
+ : "\\vspace{" + lenstr + '}';
+ }
+ break;
+
}
- return string(); // should never be reached
-}
+ return ret;
+}
-int VSpace::inPixels(BufferView * bv) const
-{
- // Height of a normal line in pixels (zoom factor considered)
- int default_height = bv->text->defaultHeight(); // [pixels]
- int default_skip = 0;
- int default_width = bv->workWidth();
- if (kind_ == DEFSKIP)
- default_skip = bv->buffer()->params.getDefSkip().inPixels(bv);
+int VSpace::inPixels(BufferView const * bv) const
+{
// Height of a normal line in pixels (zoom factor considered)
- int height = default_height; // [pixels]
-
- // 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]
+ int const default_height = bv->defaultHeight(); // [pixels]
- // We want the result in pixels
- double result;
- double value;
+ int retval = 0;
switch (kind_) {
+
case NONE:
- return 0;
+ // value for this is already set
+ break;
case DEFSKIP:
- return default_skip;
-
- // This is how the skips are normally defined by
- // LateX. But there should be some way to change
- // this per document.
- case SMALLSKIP: return height / 4;
- case MEDSKIP: return height / 2;
- case BIGSKIP: return height;
- case VFILL: return 3 * height;
+ retval = bv->buffer()->params.getDefSkip().inPixels(bv);
+ break;
+
+ // This is how the skips are normally defined by LateX.
+ // But there should be some way to change this per document.
+ case SMALLSKIP:
+ retval = default_height / 4;
+ break;
+
+ case MEDSKIP:
+ retval = default_height / 2;
+ break;
+
+ case BIGSKIP:
+ retval = default_height;
+ break;
+
+ case VFILL:
// leave space for the vfill symbol
+ retval = 3 * default_height;
+ break;
+
case LENGTH:
- // 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
- result = 0.0;
- value = len_.len().value();
- int val_sign = value < 0.0 ? -1 : 1;
-
- switch (len_.len().unit()) {
- case LyXLength::SP:
- // Scaled point: sp = 1/65536 pt
- result = zoom * dpi * value
- / (72.27 * 65536); // 4736286.7
- break;
- case LyXLength::PT:
- // Point: 1 pt = 1/72.27 inch
- result = zoom * dpi * value
- / 72.27; // 72.27
- break;
- case LyXLength::BP:
- // Big point: 1 bp = 1/72 inch
- result = zoom * dpi * value
- / 72; // 72
- break;
- case LyXLength::DD:
- // Didot: 1157dd = 1238 pt?
- result = zoom * dpi * value
- / (72.27 / (0.376 * 2.845)); // 67.559735
- break;
- case LyXLength::MM:
- // Millimeter: 1 mm = 1/25.4 inch
- result = zoom * dpi * value
- / 25.4; // 25.4
- break;
- case LyXLength::PC:
- // Pica: 1 pc = 12 pt
- result = zoom * dpi * value
- / (72.27 / 12); // 6.0225
- break;
- case LyXLength::CC:
- // Cicero: 1 cc = 12 dd
- result = zoom * dpi * value
- / (72.27 / (12 * 0.376 * 2.845)); // 5.6299779
- break;
- case LyXLength::CM:
- // Centimeter: 1 cm = 1/2.54 inch
- result = zoom * dpi * value
- / 2.54; // 2.54
- break;
- case LyXLength::IN:
- // Inch
- result = zoom * dpi * value;
- break;
- case LyXLength::EX:
- // Ex: The height of an "x"
- result = zoom * value * height / 2; // what to / width?
- break;
- case LyXLength::EM: // what to / width?
- // Em: The width of an "m"
- result = zoom * value * height / 2; // Why 2?
- break;
- case LyXLength::MU: // This is probably only allowed in
- // math mode
- result = zoom * value * height;
- break;
- case LyXLength::PW: // Always % of workarea
- case LyXLength::PE:
- case LyXLength::PP:
- case LyXLength::PL:
- result = value * default_width / 100;
- break;
- case LyXLength::UNIT_NONE:
- result = 0; // this cannot happen
- break;
- }
- return static_cast<int>(result * val_sign + 0.5);
+ retval = len_.len().inPixels(bv->workWidth(), default_height);
+ break;
+
}
- return 0; // never reached
+ return retval;
}
projects / lyx.git / blobdiff