#include "support/debug.h"
#include "support/lassert.h"
+#include "support/lyxalgo.h"
-#include <algorithm>
#include <ostream>
using namespace std;
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();
- // handle first the two bounds of the element
- if ((!rtl && pos >= i) || (rtl && endpos <= i))
- return 0;
- if ((!rtl && endpos <= i) || (rtl && pos >= i))
- return width();
+ 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());
+ }
- FontMetrics const & fm = theFontMetrics(font);
- // FIXME Avoid caching of metrics there?
- int const w = fm.width(str.substr(0, i - pos));
- if (rtl)
- return width() - w;
- else
- return w;
+ return w;
}
-pos_type Row::Element::x2pos(double &x, bool const low) const
+pos_type Row::Element::x2pos(int &x) const
{
//lyxerr << "x2pos: x=" << x << " w=" << width() << " " << *this;
- // if element is rtl, flip x value
bool const rtl = font.isVisibleRightToLeft();
- double x2 = rtl ? (width() - x) : x;
+ size_t i = 0;
- FontMetrics const & fm = theFontMetrics(font);
- double last_w = 0;
- double w = 0;
- size_t i = 1;
- // non-STRING element only contain one position
- if (type != STRING) {
+ 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;
- w = width();
- } else {
- // FIXME: implement dichotomy search?
- for ( ; i <= str.size() ; ++i) {
- last_w = w;
- w = fm.width(str.substr(0,i));
- if (w > x2) {
- --i;
- break;
- }
+ 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;
}
- // if (i == str.size())
- // lyxerr << " NOT FOUND ";
- }
- // round to the closest side
- if (!low && (x2 - last_w > w - x2)) {
- x2 = w;
- ++i;
- } else
- x2 = last_w;
-
- // is element is rtl, flip values
- if (rtl) {
- x = width() - x2;
- } else {
- x = x2;
}
-
- //lyxerr << "=> p=" << i << " x=" << x << endl;
+ //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;
}
Row::Row()
- : separator(0), label_hfill(0), x(0), right_margin(0),
+ : 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)
switch (e.type) {
case Row::STRING:
- os << "STRING: `" << to_utf8(e.str) << "' " << e.dim.wid;
+ os << "STRING: `" << to_utf8(e.str) << "', ";
break;
case Row::VIRTUAL:
- os << "VIRTUAL: `" << to_utf8(e.str) << "'";
+ os << "VIRTUAL: `" << to_utf8(e.str) << "', ";
break;
case Row::INSET:
- os << "INSET: " << to_utf8(e.inset->layoutName());
+ os << "INSET: " << to_utf8(e.inset->layoutName()) << ", ";
break;
case Row::SEPARATOR:
- os << "SEPARATOR: " << e.dim.wid << "+" << e.extra;
+ os << "SEPARATOR: extra=" << e.extra << ", ";
break;
case Row::SPACE:
- os << "SPACE: " << e.dim.wid;
+ os << "SPACE: ";
break;
}
+ os << "width=" << e.full_width();
return os;
}
ostream & operator<<(ostream & os, Row const & row)
{
os << " pos: " << row.pos_ << " end: " << row.end_
- << " x: " << row.x
+ << " 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 << "\n";
- double x = row.x;
+ << " 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->width();
+ x += it->full_width();
}
return os;
}
Element e(STRING, pos, f, ch);
elements_.push_back(e);
}
- //lyxerr << "FONT " <<back().font.language() << endl;
back().str += c;
back().endpos = pos + 1;
}
finalizeLast();
Element e(VIRTUAL, pos, f, ch);
e.str = s;
- // A completion has no size
+ e.dim.wid = theFontMetrics(f).width(s);
+ dim_.wid += e.dim.wid;
e.endpos = pos;
elements_.push_back(e);
finalizeLast();
}
-void Row::shorten_if_needed(pos_type const keep, int const w)
+void Row::shortenIfNeeded(pos_type const keep, int const w)
{
- if (empty() || width() < w)
+ if (empty() || width() <= w)
return;
- /** First, we try to remove elements one by one from the end
- * until a separator is found.
- */
- int i = elements_.size();
- int new_end = end_;
- int new_wid = dim_.wid;
- if (i > 0 && elements_[i - 1].type == SEPARATOR && new_end > keep) {
- --i;
- new_end = elements_[i].pos;
- new_wid -= elements_[i].dim.wid;
+ 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;
}
- while (i > 0 && elements_[i - 1].type != SEPARATOR && new_end > keep) {
- --i;
- new_end = elements_[i].pos;
- new_wid -= elements_[i].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 (i == 0) {
- /* 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 a paragraph marker after it.
- */
- Element & front = elements_.front();
- if (!(front.type == STRING
- && (elements_.size() == 1
- || (elements_.size() == 2
- && back().type == VIRTUAL))))
- return;
-
- // If this is a string element, we can try to split it.
- if (front.type != STRING)
- return;
- double xstr = w - x;
- // If there is a paragraph marker, it should be taken in account
- if (elements_.size() == 2)
- xstr -= back().width();
- pos_type new_pos = front.x2pos(xstr, true);
- front.str = front.str.substr(0, new_pos - pos_);
- front.dim.wid = xstr;
- front.endpos = new_pos;
- end_ = new_pos;
- dim_.wid = x + xstr;
- // If there is a paragraph marker, it should be removed.
- if (elements_.size() == 2)
- elements_.pop_back();
+
+ 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;
}
- end_ = new_end;
- dim_.wid = new_wid;
- elements_.erase(elements_.begin() + i, elements_.end());
+
+ /* 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()
+void Row::reverseRTL(bool const rtl_par)
{
pos_type i = 0;
pos_type const end = elements_.size();
while (i < end) {
- // skip LtR elements
- while (i < end && !elements_[i].font.isRightToLeft())
- ++i;
- if (i >= end)
- break;
-
- // look for a RTL sequence
+ // 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.isRightToLeft())
+ while (j < end && elements_[j].font.isVisibleRightToLeft() == rtl)
++j;
- reverse(elements_.begin() + i, elements_.begin() + 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