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"
27 #include "support/debug.h"
28 #include "support/gettext.h"
30 #include "LaTeXFeatures.h"
35 #include "OutputParams.h"
36 #include "paragraph_funcs.h"
38 #include "TextClass.h"
42 #include "frontends/FontMetrics.h"
44 #include "insets/InsetBibitem.h"
45 #include "insets/InsetOptArg.h"
47 #include "support/lstrings.h"
48 #include "support/textutils.h"
49 #include "support/convert.h"
51 #include <boost/bind.hpp>
52 #include <boost/crc.hpp>
60 using namespace lyx::support;
65 ParagraphMetrics::ParagraphMetrics(Paragraph const & par): position_(-1), par_(&par)
70 ParagraphMetrics & ParagraphMetrics::operator=(
71 ParagraphMetrics const & pm)
76 position_ = pm.position_;
81 void ParagraphMetrics::reset(Paragraph const & par)
89 size_t ParagraphMetrics::computeRowSignature(Row const & row,
90 BufferParams const & bparams) const
92 boost::crc_32_type crc;
93 for (pos_type i = row.pos(); i < row.endpos(); ++i) {
94 char_type const b[] = { par_->getChar(i) };
95 crc.process_bytes(b, sizeof(char_type));
96 if (bparams.trackChanges) {
97 Change change = par_->lookupChange(i);
98 char_type const b[] = { change.type };
99 // 1 byte is enough to encode Change::Type
100 crc.process_bytes(b, 1);
104 Dimension const & d = row.dimension();
105 char_type const b[] = { row.sel_beg, row.sel_end, d.wid, d.asc, d.des};
106 // Each of the variable to process is 4 bytes: 4x5 = 20
107 crc.process_bytes(b, 20);
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 BOOST_ASSERT(!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 BOOST_ASSERT(!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 BOOST_ASSERT(!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(Buffer const & buffer) const
200 BufferParams const & params = buffer.params();
201 TextClass const & tclass = params.getTextClass();
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 (par_->isInset(pos))
217 return insetDimension(par_->getInset(pos)).wid;
219 char_type c = par_->getChar(pos);
222 return theFontMetrics(font).width(c);
224 Language const * language = font.language();
225 if (language->rightToLeft()) {
226 if (language->lang() == "arabic_arabtex" ||
227 language->lang() == "arabic_arabi" ||
228 language->lang() == "farsi") {
229 if (Encodings::isComposeChar_arabic(c))
231 c = par_->transformChar(c, pos);
232 } else if (language->lang() == "hebrew" &&
233 Encodings::isComposeChar_hebrew(c))
236 return theFontMetrics(font).width(c);
240 bool ParagraphMetrics::hfillExpansion(Row const & row, pos_type pos) const
242 if (!par_->isHfill(pos))
245 BOOST_ASSERT(pos >= row.pos() && pos < row.endpos());
247 // expand at the end of a row only if there is another hfill on the same row
248 if (pos == row.endpos() - 1) {
249 for (pos_type i = row.pos(); i < pos; i++) {
250 if (par_->isHfill(i))
256 // expand at the beginning of a row only if it is the first row of a paragraph
257 if (pos == row.pos()) {
261 // do not expand in some labels
262 if (par_->layout()->margintype != MARGIN_MANUAL && pos < par_->beginOfBody())
265 // if there is anything between the first char of the row and
266 // the specified position that is neither a newline nor an hfill,
267 // the hfill will be expanded, otherwise it won't
268 for (pos_type i = row.pos(); i < pos; i++) {
269 if (!par_->isNewline(i) && !par_->isHfill(i))