3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * \author Asger Alstrup
7 * \author Lars Gullik Bjønnes
8 * \author Jean-Marc Lasgouttes
9 * \author Angus Leeming
11 * \author André Pönitz
13 * \author Jürgen Vigna
15 * Full author contact details are available in file CREDITS.
20 #include "ParagraphMetrics.h"
23 #include "BufferParams.h"
24 #include "BufferView.h"
28 #include "LaTeXFeatures.h"
33 #include "OutputParams.h"
35 #include "TextClass.h"
39 #include "frontends/FontMetrics.h"
41 #include "insets/InsetBibitem.h"
42 #include "insets/InsetOptArg.h"
44 #include "support/lassert.h"
45 #include "support/debug.h"
46 #include "support/gettext.h"
47 #include "support/lstrings.h"
48 #include "support/textutils.h"
50 #include <boost/bind.hpp>
51 #include <boost/crc.hpp>
59 using namespace lyx::support
;
64 ParagraphMetrics::ParagraphMetrics(Paragraph
const & par
) :
65 position_(-1), par_(&par
)
69 ParagraphMetrics
& ParagraphMetrics::operator=(
70 ParagraphMetrics
const & pm
)
75 position_
= pm
.position_
;
80 void ParagraphMetrics::reset(Paragraph
const & par
)
88 size_t ParagraphMetrics::computeRowSignature(Row
const & row
,
89 BufferParams
const & bparams
) const
91 boost::crc_32_type crc
;
92 for (pos_type i
= row
.pos(); i
< row
.endpos(); ++i
) {
93 char_type
const b
[] = { par_
->getChar(i
) };
94 crc
.process_bytes(b
, sizeof(char_type
));
95 if (bparams
.trackChanges
) {
96 Change change
= par_
->lookupChange(i
);
97 char_type
const b
[] = { change
.type
};
98 // 1 byte is enough to encode Change::Type
99 crc
.process_bytes(b
, 1);
103 Dimension
const & d
= row
.dimension();
104 char_type
const b
[] = { row
.sel_beg
, row
.sel_end
,
105 row
.begin_margin_sel
, row
.end_margin_sel
, d
.wid
, d
.asc
, d
.des
};
106 // Each of the variable to process is 4 bytes: 4x7 = 28
107 crc
.process_bytes(b
, 28);
109 return crc
.checksum();
113 void ParagraphMetrics::setPosition(int position
)
115 position_
= position
;
119 Dimension
const & ParagraphMetrics::insetDimension(Inset
const * inset
) const
121 InsetDims::const_iterator it
= inset_dims_
.find(inset
);
122 if (it
!= inset_dims_
.end())
125 static Dimension dummy
;
130 void ParagraphMetrics::setInsetDimension(Inset
const * inset
,
131 Dimension
const & dim
)
133 inset_dims_
[inset
] = dim
;
137 Row
& ParagraphMetrics::getRow(pos_type pos
, bool boundary
)
139 LASSERT(!rows().empty(), /**/);
141 // If boundary is set we should return the row on which
142 // the character before is inside.
143 if (pos
> 0 && boundary
)
146 RowList::iterator rit
= rows_
.end();
147 RowList::iterator
const begin
= rows_
.begin();
149 for (--rit
; rit
!= begin
&& rit
->pos() > pos
; --rit
)
156 Row
const & ParagraphMetrics::getRow(pos_type pos
, bool boundary
) const
158 LASSERT(!rows().empty(), /**/);
160 // If boundary is set we should return the row on which
161 // the character before is inside.
162 if (pos
> 0 && boundary
)
165 RowList::const_iterator rit
= rows_
.end();
166 RowList::const_iterator
const begin
= rows_
.begin();
168 for (--rit
; rit
!= begin
&& rit
->pos() > pos
; --rit
)
175 size_t ParagraphMetrics::pos2row(pos_type pos
) const
177 LASSERT(!rows().empty(), /**/);
179 RowList::const_iterator rit
= rows_
.end();
180 RowList::const_iterator
const begin
= rows_
.begin();
182 for (--rit
; rit
!= begin
&& rit
->pos() > pos
; --rit
)
189 void ParagraphMetrics::dump() const
191 lyxerr
<< "Paragraph::dump: rows.size(): " << rows_
.size() << endl
;
192 for (size_t i
= 0; i
!= rows_
.size(); ++i
) {
193 lyxerr
<< " row " << i
<< ": ";
198 int ParagraphMetrics::rightMargin(BufferView
const & bv
) const
200 BufferParams
const & params
= bv
.buffer().params();
201 DocumentClass
const & tclass
= params
.documentClass();
202 frontend::FontMetrics
const & fm
= theFontMetrics(params
.getFont());
205 + fm
.signedWidth(tclass
.rightmargin())
206 + fm
.signedWidth(par_
->layout().rightmargin
)
207 * 4 / (par_
->getDepth() + 4);
213 int ParagraphMetrics::singleWidth(pos_type pos
, Font
const & font
) const
215 // The most special cases are handled first.
216 if (Inset
const * inset
= par_
->getInset(pos
))
217 return insetDimension(inset
).wid
;
219 char_type c
= par_
->getChar(pos
);
222 return 4 * theFontMetrics(font
).width(' ');
225 return theFontMetrics(font
).width(c
);
227 Language
const * language
= font
.language();
228 if (language
->rightToLeft()) {
229 if (language
->lang() == "arabic_arabtex" ||
230 language
->lang() == "arabic_arabi" ||
231 language
->lang() == "farsi") {
232 if (Encodings::isArabicComposeChar(c
))
234 c
= par_
->transformChar(c
, pos
);
235 } else if (language
->lang() == "hebrew" &&
236 Encodings::isHebrewComposeChar(c
)) {
240 return theFontMetrics(font
).width(c
);
244 bool ParagraphMetrics::hfillExpansion(Row
const & row
, pos_type pos
) const
246 if (!par_
->isHfill(pos
))
249 LASSERT(pos
>= row
.pos() && pos
< row
.endpos(), /**/);
251 // expand at the end of a row only if there is another hfill on the same row
252 if (pos
== row
.endpos() - 1) {
253 for (pos_type i
= row
.pos(); i
< pos
; i
++) {
254 if (par_
->isHfill(i
))
260 // expand at the beginning of a row only if it is the first row of a paragraph
261 if (pos
== row
.pos()) {
265 // do not expand in some labels
266 if (par_
->layout().margintype
!= MARGIN_MANUAL
&& pos
< par_
->beginOfBody())
269 // if there is anything between the first char of the row and
270 // the specified position that is neither a newline nor an hfill,
271 // the hfill will be expanded, otherwise it won't
272 for (pos_type i
= row
.pos(); i
< pos
; i
++) {
273 if (!par_
->isNewline(i
) && !par_
->isHfill(i
))