-/* 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 "lyxrc.h"
#include "lyxtext.h"
#include "BufferView.h"
+#include "support/LAssert.h"
#include "support/lstrings.h"
namespace {
-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();
}
-
+/**
+ * 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);
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 },
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) {
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);
-
- // 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->text->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;
+ 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: return height / 4;
- case MEDSKIP: return height / 2;
- case BIGSKIP: return height;
- case VFILL: return 3 * height;
+ 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
- case LENGTH:
- return len_.len().inPixels(bv);
+ retval = 3 * default_height;
+ break;
+
+ case LENGTH: {
+ int const default_width = bv->workWidth();
+ retval = len_.len().inPixels(default_width, default_height);
+ break;
+ }
+
}
- return 0; // never reached
+ return retval;
}
projects / lyx.git / blobdiff