* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
- * \author unknown
- * \author Lars Gullik Bjønnes
+ * \author Lars Gullik Bjønnes
* \author John Levon
- * \author André Pönitz
- * \author Jürgen Vigna
+ * \author André Pönitz
+ * \author Jürgen Vigna
+ * \author Jean-Marc Lasgouttes
*
* Full author contact details are available in file CREDITS.
*
#include <config.h>
#include "Row.h"
-#include "debug.h"
+#include "DocIterator.h"
+
+#include "frontends/FontMetrics.h"
+
+#include "support/debug.h"
+#include "support/lassert.h"
+#include "support/lyxalgo.h"
+
+#include <ostream>
+
+using namespace std;
namespace lyx {
+using frontend::FontMetrics;
-Row::Row()
- : separator(0), hfill(0), label_hfill(0), x(0),
- sel_beg(-1), sel_end(-1), changed_(false), crc_(0), pos_(0), end_(0)
-{}
+double Row::Element::pos2x(pos_type const i) const
+{
+ // This can happen with inline completion when clicking on the
+ // row after the completion.
+ if (i < pos || i > endpos)
+ return 0;
+ bool const rtl = font.isVisibleRightToLeft();
-Row::Row(pos_type pos)
- : separator(0), hfill(0), label_hfill(0), x(0),
- sel_beg(-1), sel_end(-1), changed_(false), crc_(0), pos_(pos), end_(0)
-{}
+ double w = 0;
+ //handle first the two bounds of the element
+ if (i == endpos && type != VIRTUAL
+ && !(inset && inset->lyxCode() == SEPARATOR_CODE))
+ w = rtl ? 0 : full_width();
+ else if (i == pos || type != STRING)
+ w = rtl ? full_width() : 0;
+ else {
+ FontMetrics const & fm = theFontMetrics(font);
+ w = fm.pos2x(str, i - pos, font.isVisibleRightToLeft());
+ }
+
+ return w;
+}
-void Row::setCrc(size_type crc)
+pos_type Row::Element::x2pos(int &x) const
{
- changed_ |= crc != crc_;
- crc_ = crc;
+ //lyxerr << "x2pos: x=" << x << " w=" << width() << " " << *this;
+ bool const rtl = font.isVisibleRightToLeft();
+ size_t i = 0;
+
+ switch (type) {
+ case STRING: {
+ FontMetrics const & fm = theFontMetrics(font);
+ i = fm.x2pos(str, x, rtl);
+ break;
+ }
+ case VIRTUAL:
+ // those elements are actually empty (but they have a width)
+ i = 0;
+ x = rtl ? int(full_width()) : 0;
+ break;
+ case SEPARATOR:
+ case INSET:
+ case SPACE:
+ // those elements contain only one position. Round to
+ // the closest side.
+ if (x > full_width()) {
+ x = int(full_width());
+ i = !rtl;
+ } else {
+ x = 0;
+ i = rtl;
+ }
+
+ }
+ //lyxerr << "=> p=" << pos + i << " x=" << x << endl;
+ return pos + i;
+
+}
+
+
+bool Row::Element::breakAt(int w)
+{
+ if (type != STRING || dim.wid <= w)
+ return false;
+
+ bool const rtl = font.isVisibleRightToLeft();
+ if (rtl)
+ w = dim.wid - w;
+ pos_type new_pos = x2pos(w);
+ if (new_pos == pos)
+ return false;
+ str = str.substr(0, new_pos - pos);
+ if (rtl)
+ dim.wid -= w;
+ else
+ dim.wid = w;
+ endpos = new_pos;
+ return true;
+}
+
+
+pos_type Row::Element::left_pos() const
+{
+ return font.isVisibleRightToLeft() ? endpos : pos;
+}
+
+
+pos_type Row::Element::right_pos() const
+{
+ return font.isVisibleRightToLeft() ? pos : endpos;
}
-void Row::setDimension(Dimension const & dim)
+Row::Row()
+ : separator(0), label_hfill(0), left_margin(0), right_margin(0),
+ sel_beg(-1), sel_end(-1),
+ begin_margin_sel(false), end_margin_sel(false),
+ changed_(false), crc_(0), pos_(0), end_(0), right_boundary_(false)
+{}
+
+
+void Row::setCrc(size_type crc) const
{
- changed_ |= dim != dim_;
- dim_ = dim;
+ changed_ = crc != crc_;
+ crc_ = crc;
}
-void Row::pos(pos_type p)
+bool Row::isMarginSelected(bool left_margin, DocIterator const & beg,
+ DocIterator const & end) const
{
- pos_ = p;
+ pos_type const sel_pos = left_margin ? sel_beg : sel_end;
+ pos_type const margin_pos = left_margin ? pos_ : end_;
+
+ // Is the chosen margin selected ?
+ if (sel_pos == margin_pos) {
+ if (beg.pos() == end.pos())
+ // This is a special case in which the space between after
+ // pos i-1 and before pos i is selected, i.e. the margins
+ // (see DocIterator::boundary_).
+ return beg.boundary() && !end.boundary();
+ else if (end.pos() == margin_pos)
+ // If the selection ends around the margin, it is only
+ // drawn if the cursor is after the margin.
+ return !end.boundary();
+ else if (beg.pos() == margin_pos)
+ // If the selection begins around the margin, it is
+ // only drawn if the cursor is before the margin.
+ return beg.boundary();
+ else
+ return true;
+ }
+ return false;
}
-void Row::endpos(pos_type p)
+void Row::setSelectionAndMargins(DocIterator const & beg,
+ DocIterator const & end) const
{
- end_ = p;
+ setSelection(beg.pos(), end.pos());
+
+ if (selection()) {
+ end_margin_sel = isMarginSelected(false, beg, end);
+ begin_margin_sel = isMarginSelected(true, beg, end);
+ }
}
-void Row::setSelection(pos_type beg, pos_type end)
+void Row::setSelection(pos_type beg, pos_type end) const
{
- pos_type sel_beg_b = sel_beg;
if (pos_ >= beg && pos_ <= end)
sel_beg = pos_;
else if (beg > pos_ && beg <= end_)
else
sel_beg = -1;
- pos_type sel_end_b = sel_end;
if (end_ >= beg && end_ <= end)
sel_end = end_;
else if (end < end_ && end >= pos_)
sel_end = end;
else
sel_end = -1;
-/*
- && ((rit->pos() >= beg.pos() && rit->pos() <= end.pos())
- || (rit->endpos() >= beg.pos() && rit->endpos() <= end.pos())
- || (beg.pos() >= rit->pos() && beg.pos() <= rit->endpos())
- || (end.pos() >= rit->pos() && end.pos() <= rit->endpos()));
-*/
- changed_ |= sel_beg_b != sel_beg;
- changed_ |= sel_end_b != sel_end;
}
-void Row::dump(char const * s) const
+bool Row::selection() const
+{
+ return sel_beg != -1 && sel_end != -1;
+}
+
+
+ostream & operator<<(ostream & os, Row::Element const & e)
+{
+ if (e.font.isVisibleRightToLeft())
+ os << e.endpos << "<<" << e.pos << " ";
+ else
+ os << e.pos << ">>" << e.endpos << " ";
+
+ switch (e.type) {
+ case Row::STRING:
+ os << "STRING: `" << to_utf8(e.str) << "', ";
+ break;
+ case Row::VIRTUAL:
+ os << "VIRTUAL: `" << to_utf8(e.str) << "', ";
+ break;
+ case Row::INSET:
+ os << "INSET: " << to_utf8(e.inset->layoutName()) << ", ";
+ break;
+ case Row::SEPARATOR:
+ os << "SEPARATOR: extra=" << e.extra << ", ";
+ break;
+ case Row::SPACE:
+ os << "SPACE: ";
+ break;
+ }
+ os << "width=" << e.full_width();
+ return os;
+}
+
+
+ostream & operator<<(ostream & os, Row const & row)
+{
+ os << " pos: " << row.pos_ << " end: " << row.end_
+ << " left_margin: " << row.left_margin
+ << " width: " << row.dim_.wid
+ << " right_margin: " << row.right_margin
+ << " ascent: " << row.dim_.asc
+ << " descent: " << row.dim_.des
+ << " separator: " << row.separator
+ << " label_hfill: " << row.label_hfill
+ << " row_boundary: " << row.right_boundary() << "\n";
+ double x = row.left_margin;
+ Row::Elements::const_iterator it = row.elements_.begin();
+ for ( ; it != row.elements_.end() ; ++it) {
+ os << "x=" << x << " => " << *it << endl;
+ x += it->full_width();
+ }
+ return os;
+}
+
+
+bool Row::sameString(Font const & f, Change const & ch) const
+{
+ if (elements_.empty())
+ return false;
+ Element const & elt = elements_.back();
+ return elt.type == STRING && !elt.final
+ && elt.font == f && elt.change == ch;
+}
+
+
+void Row::finalizeLast()
+{
+ if (elements_.empty())
+ return;
+ Element & elt = elements_.back();
+ if (elt.final)
+ return;
+ elt.final = true;
+
+ if (elt.type == STRING) {
+ elt.dim.wid = theFontMetrics(elt.font).width(elt.str);
+ dim_.wid += elt.dim.wid;
+ }
+}
+
+
+void Row::add(pos_type const pos, Inset const * ins, Dimension const & dim,
+ Font const & f, Change const & ch)
+{
+ finalizeLast();
+ Element e(INSET, pos, f, ch);
+ e.inset = ins;
+ e.dim = dim;
+ elements_.push_back(e);
+ dim_.wid += dim.wid;
+}
+
+
+void Row::add(pos_type const pos, char_type const c,
+ Font const & f, Change const & ch)
+{
+ if (!sameString(f, ch)) {
+ finalizeLast();
+ Element e(STRING, pos, f, ch);
+ elements_.push_back(e);
+ }
+ back().str += c;
+ back().endpos = pos + 1;
+}
+
+
+void Row::addVirtual(pos_type const pos, docstring const & s,
+ Font const & f, Change const & ch)
+{
+ finalizeLast();
+ Element e(VIRTUAL, pos, f, ch);
+ e.str = s;
+ e.dim.wid = theFontMetrics(f).width(s);
+ dim_.wid += e.dim.wid;
+ e.endpos = pos;
+ elements_.push_back(e);
+ finalizeLast();
+}
+
+
+void Row::addSeparator(pos_type const pos, char_type const c,
+ Font const & f, Change const & ch)
+{
+ finalizeLast();
+ Element e(SEPARATOR, pos, f, ch);
+ e.str += c;
+ e.dim.wid = theFontMetrics(f).width(c);
+ elements_.push_back(e);
+ dim_.wid += e.dim.wid;
+}
+
+
+void Row::addSpace(pos_type const pos, int const width,
+ Font const & f, Change const & ch)
+{
+ finalizeLast();
+ Element e(SPACE, pos, f, ch);
+ e.dim.wid = width;
+ elements_.push_back(e);
+ dim_.wid += e.dim.wid;
+}
+
+
+void Row::pop_back()
{
- lyxerr << s << " pos: " << pos_ << " end: " << end_
- << " width: " << dim_.wid
- << " ascent: " << dim_.asc
- << " descent: " << dim_.des
- << std::endl;
+ dim_.wid -= elements_.back().dim.wid;
+ elements_.pop_back();
}
+void Row::shortenIfNeeded(pos_type const keep, int const w)
+{
+ if (empty() || width() <= w)
+ return;
+
+ Elements::iterator const beg = elements_.begin();
+ Elements::iterator const end = elements_.end();
+ Elements::iterator last_sep = elements_.end();
+ int last_width = 0;
+ int wid = left_margin;
+
+ Elements::iterator cit = beg;
+ for ( ; cit != end ; ++cit) {
+ if (cit->type == SEPARATOR && cit->pos >= keep) {
+ last_sep = cit;
+ last_width = wid;
+ }
+ if (wid + cit->dim.wid > w)
+ break;
+ wid += cit->dim.wid;
+ }
+
+ if (last_sep != end) {
+ // We have found a suitable separator. This is the
+ // common case.
+ end_ = last_sep->endpos;
+ dim_.wid = last_width;
+ elements_.erase(last_sep, end);
+ return;
+ }
+
+ if (cit == end) {
+ // This should not happen since the row is too long.
+ LYXERR0("Something is wrong cannot shorten row: " << *this);
+ return;
+ }
+
+ if (cit != beg && cit->type == VIRTUAL) {
+ // It is not possible to separate a virtual element from the
+ // previous one.
+ --cit;
+ wid -= cit->dim.wid;
+ }
+
+ if (cit != beg) {
+ // There is no separator, but several elements (probably
+ // insets) have been added. We can cut at this place.
+ end_ = cit->pos;
+ dim_.wid = wid;
+ elements_.erase(cit, end);
+ return;
+ }
+
+ /* If we are here, it means that we have not found a separator
+ * to shorten the row. There is one case where we can do
+ * something: when we have one big string, maybe with some
+ * other things after it.
+ */
+ if (cit->breakAt(w - left_margin)) {
+ end_ = cit->endpos;
+ dim_.wid = left_margin + cit->dim.wid;
+ // If there are other elements, they should be removed.
+ elements_.erase(next(cit, 1), end);
+ }
+}
+
+
+void Row::reverseRTL(bool const rtl_par)
+{
+ pos_type i = 0;
+ pos_type const end = elements_.size();
+ while (i < end) {
+ // gather a sequence of elements with the same direction
+ bool const rtl = elements_[i].font.isVisibleRightToLeft();
+ pos_type j = i;
+ while (j < end && elements_[j].font.isVisibleRightToLeft() == rtl)
+ ++j;
+ // if the direction is not the same as the paragraph
+ // direction, the sequence has to be reverted.
+ if (rtl != rtl_par)
+ reverse(elements_.begin() + i, elements_.begin() + j);
+ i = j;
+ }
+ // If the paragraph itself is RTL, reverse everything
+ if (rtl_par)
+ reverse(elements_.begin(), elements_.end());
+}
+
} // namespace lyx
projects / lyx.git / blobdiff