using frontend::FontMetrics;
+// Maximum length that a space can be stretched when justifying text
+static double const MAX_SPACE_STRETCH = 1.5; //em
+
+
int Row::Element::countSeparators() const
{
if (type != STRING)
}
+int Row::Element::countExpanders() const
+{
+ if (type != STRING)
+ return 0;
+ return theFontMetrics(font).countExpanders(str);
+}
+
+
+int Row::Element::expansionAmount() const
+{
+ if (type != STRING)
+ return 0;
+ return countExpanders() * theFontMetrics(font).em();
+}
+
+
+void Row::Element::setExtra(double extra_per_em)
+{
+ if (type != STRING)
+ return;
+ extra = extra_per_em * theFontMetrics(font).em();
+}
+
+
double Row::Element::pos2x(pos_type const i) const
{
// This can happen with inline completion when clicking on the
if (i < pos || i > endpos)
return 0;
- bool const rtl = font.isVisibleRightToLeft();
-
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();
+ if (i == endpos && type != VIRTUAL)
+ w = isRTL() ? 0 : full_width();
else if (i == pos || type != STRING)
- w = rtl ? full_width() : 0;
+ w = isRTL() ? full_width() : 0;
else {
FontMetrics const & fm = theFontMetrics(font);
- w = fm.pos2x(str, i - pos, font.isVisibleRightToLeft(), extra);
+ w = fm.pos2x(str, i - pos, isRTL(), extra);
}
return w;
pos_type Row::Element::x2pos(int &x) const
{
//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, extra);
+ i = fm.x2pos(str, x, isRTL(), extra);
break;
}
case VIRTUAL:
// those elements are actually empty (but they have a width)
i = 0;
- x = rtl ? int(full_width()) : 0;
+ x = isRTL() ? int(full_width()) : 0;
break;
case INSET:
case SPACE:
// the closest side.
if (x > full_width()) {
x = int(full_width());
- i = !rtl;
+ i = !isRTL();
} else {
x = 0;
- i = rtl;
+ i = isRTL();
}
}
if (type != STRING || dim.wid <= w)
return false;
- bool const rtl = font.isVisibleRightToLeft();
FontMetrics const & fm = theFontMetrics(font);
int x = w;
- if(fm.breakAt(str, x, rtl, force)) {
+ if(fm.breakAt(str, x, isRTL(), force)) {
dim.wid = x;
endpos = pos + str.length();
//lyxerr << "breakAt(" << w << ") Row element Broken at " << x << "(w(str)=" << fm.width(str) << "): e=" << *this << endl;
return true;
}
+
return false;
}
pos_type Row::Element::left_pos() const
{
- return font.isVisibleRightToLeft() ? endpos : pos;
+ return isRTL() ? endpos : pos;
}
pos_type Row::Element::right_pos() const
{
- return font.isVisibleRightToLeft() ? pos : endpos;
+ return isRTL() ? pos : endpos;
}
: 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)
+ changed_(false), crc_(0),
+ pit_(0), pos_(0), end_(0), right_boundary_(false)
{}
ostream & operator<<(ostream & os, Row::Element const & e)
{
- if (e.font.isVisibleRightToLeft())
+ if (e.isRTL())
os << e.endpos << "<<" << e.pos << " ";
else
os << e.pos << ">>" << e.endpos << " ";
switch (e.type) {
case Row::STRING:
os << "STRING: `" << to_utf8(e.str) << "' ("
- << e.countSeparators() << " sep.), ";
+ << e.countExpanders() << " expanders.), ";
break;
case Row::VIRTUAL:
os << "VIRTUAL: `" << to_utf8(e.str) << "', ";
}
+int Row::left_x() const
+{
+ double x = left_margin;
+ const_iterator const end = elements_.end();
+ const_iterator cit = elements_.begin();
+ while (cit != end && cit->isVirtual()) {
+ x += cit->full_width();
+ ++cit;
+ }
+ return int(x + 0.5);
+}
+
+
+int Row::right_x() const
+{
+ double x = dim_.wid;
+ const_iterator const begin = elements_.begin();
+ const_iterator cit = elements_.end();
+ while (cit != begin) {
+ --cit;
+ if (cit->isVirtual())
+ x -= cit->full_width();
+ else
+ break;
+ }
+ return int(x + 0.5);
+}
+
+
int Row::countSeparators() const
{
int n = 0;
}
-void Row::setSeparatorExtraWidth(double w)
+bool Row::setExtraWidth(int w)
{
- separator = w;
- iterator const end = elements_.end();
- for (iterator it = elements_.begin() ; it != end ; ++it)
- if (it->type == Row::STRING)
- it->extra = w;
+ if (w < 0)
+ // this is not expected to happen (but it does)
+ return false;
+ // amount of expansion: number of expanders time the em value for each
+ // string element
+ int exp_amount = 0;
+ for (Row::Element const & e : elements_)
+ exp_amount += e.expansionAmount();
+ if (!exp_amount)
+ return false;
+ // extra length per expander per em
+ double extra_per_em = double(w) / exp_amount;
+ if (extra_per_em > MAX_SPACE_STRETCH)
+ // do not stretch more than MAX_SPACE_STRETCH em per expander
+ return false;
+ // add extra length to each element proportionally to its em.
+ for (Row::Element & e : elements_)
+ if (e.type == Row::STRING)
+ e.setExtra(extra_per_em);
+ // update row dimension
+ dim_.wid += w;
+ return true;
}
}
-void Row::shortenIfNeeded(pos_type const keep, int const w)
+bool Row::shortenIfNeeded(pos_type const keep, int const w)
{
if (empty() || width() <= w)
- return;
+ return false;
Elements::iterator const beg = elements_.begin();
Elements::iterator const end = elements_.end();
if (cit == end) {
// This should not happen since the row is too long.
LYXERR0("Something is wrong cannot shorten row: " << *this);
- return;
+ return false;
}
// Iterate backwards over breakable elements and try to break them
/* after breakAt, there may be spaces at the end of the
* string, but they are not counted in the string length
* (QTextLayout feature, actually). We remove them, but do
- * not change the endo of the row, since the spaces at row
+ * not change the end of the row, since spaces at row
* break are invisible.
*/
brk.str = rtrim(brk.str);
dim_.wid = wid_brk + brk.dim.wid;
// If there are other elements, they should be removed.
elements_.erase(cit_brk + 1, end);
- return;
+ return true;
}
}
end_ = cit->pos;
dim_.wid = wid;
elements_.erase(cit, end);
- return;
+ return true;
}
/* If we are here, it means that we have not found a separator to
dim_.wid = wid + cit->dim.wid;
// If there are other elements, they should be removed.
elements_.erase(next(cit, 1), end);
+ return true;
}
+ return false;
}
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();
+ bool const rtl = elements_[i].isRTL();
pos_type j = i;
- while (j < end && elements_[j].font.isVisibleRightToLeft() == rtl)
+ while (j < end && elements_[j].isRTL() == rtl)
++j;
// if the direction is not the same as the paragraph
// direction, the sequence has to be reverted.
projects / lyx.git / blobdiff