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Reimplement RowPainter::paintSelection() using row elements

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The code is much simpler now and can be actually understood.

As a byproduct, fix bug #10424.
This commit is contained in:
Jean-Marc Lasgouttes 2016-10-25 09:28:14 +02:00
parent a9aaec540f
commit a700d657b3
1 changed files with 29 additions and 81 deletions
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110
src/RowPainter.cpp
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@ -608,96 +608,44 @@ void RowPainter::paintSelection() const
{
if (!row_.selection())
return;
Cursor const & curs = pi_.base.bv->cursor();
DocIterator beg = curs.selectionBegin();
beg.pit() = row_.pit();
beg.pos() = row_.sel_beg;
DocIterator end = curs.selectionEnd();
end.pit() = row_.pit();
end.pos() = row_.sel_end;
bool const begin_boundary = beg.pos() >= row_.endpos();
bool const end_boundary = row_.sel_end == row_.endpos();
DocIterator cur = beg;
cur.boundary(begin_boundary);
int x1 = text_metrics_.cursorX(beg.top(), begin_boundary);
int x2 = text_metrics_.cursorX(end.top(), end_boundary);
int const y1 = yo_ - row_.ascent();
int const y2 = y1 + row_.height();
int const rm = text_.isMainText() ? pi_.base.bv->rightMargin() : 0;
int const lm = text_.isMainText() ? pi_.base.bv->leftMargin() : 0;
bool const rtl = text_.isRTL(par_);
// draw the margins
if (row_.begin_margin_sel) {
if (text_.isRTL(beg.paragraph())) {
pi_.pain.fillRectangle(int(xo_ + x1), y1,
text_metrics_.width() - rm - x1, y2 - y1, Color_selection);
} else {
pi_.pain.fillRectangle(int(xo_ + lm), y1, x1 - lm, y2 - y1,
Color_selection);
}
}
if (row_.end_margin_sel) {
if (text_.isRTL(beg.paragraph())) {
pi_.pain.fillRectangle(int(xo_ + lm), y1, x2 - lm, y2 - y1,
Color_selection);
} else {
pi_.pain.fillRectangle(int(xo_ + x2), y1, text_metrics_.width() - rm - x2,
y2 - y1, Color_selection);
}
}
// if we are on a boundary from the beginning, it's probably
// a RTL boundary and we jump to the other side directly as this
// segement is 0-size and confuses the logic below
if (cur.boundary())
cur.boundary(false);
if ((row_.begin_margin_sel && !rtl) || (row_.end_margin_sel && rtl))
pi_.pain.fillRectangle(int(xo_), y1, row_.left_margin, y2 - y1,
Color_selection);
if ((row_.begin_margin_sel && rtl) || (row_.end_margin_sel && !rtl))
pi_.pain.fillRectangle(int(xo_ + row_.width()), y1,
text_metrics_.width() - row_.width(), y2 - y1,
Color_selection);
// go through row and draw from RTL boundary to RTL boundary
while (cur < end) {
bool draw_now = false;
int x = xo_ + row_.left_margin;
for (auto const & e : row_) {
// at least part of text selected?
bool const some_sel = (e.endpos >= row_.sel_beg && e.pos <= row_.sel_end)
|| pi_.selected;
// all the text selected?
bool const all_sel = (e.pos >= row_.sel_beg && e.endpos <= row_.sel_end)
|| pi_.selected;
// simplified cursorForward code below which does not
// descend into insets and which does not go into the
// next line. Compare the logic with the original cursorForward
// if left of boundary -> just jump to right side, but
// for RTL boundaries don't, because: abc|DDEEFFghi -> abcDDEEF|Fghi
if (cur.boundary()) {
cur.boundary(false);
} else if (text_metrics_.isRTLBoundary(cur.pit(), cur.pos() + 1)) {
// in front of RTL boundary -> Stay on this side of the boundary
// because: ab|cDDEEFFghi -> abc|DDEEFFghi
++cur.pos();
cur.boundary(true);
draw_now = true;
} else {
// move right
++cur.pos();
// line end?
if (cur.pos() == row_.endpos())
cur.boundary(true);
}
if (x1 == -1) {
// the previous segment was just drawn, now the next starts
x1 = text_metrics_.cursorX(cur.top(), cur.boundary());
}
if (!(cur < end) || draw_now) {
x2 = text_metrics_.cursorX(cur.top(), cur.boundary());
pi_.pain.fillRectangle(int(xo_ + min(x1, x2)), y1, abs(x2 - x1),
y2 - y1, Color_selection);
// reset x1, so it is set again next round (which will be on the
// right side of a boundary or at the selection end)
x1 = -1;
if (all_sel) {
pi_.pain.fillRectangle(x, y1, e.full_width(), y2 - y1,
Color_selection);
} else if (some_sel) {
pos_type const from = min(max(row_.sel_beg, e.pos), e.endpos);
pos_type const to = max(min(row_.sel_end, e.endpos), e.pos);
int x1 = e.pos2x(from);
int x2 = e.pos2x(to);
if (x1 > x2)
swap(x1, x2);
pi_.pain.fillRectangle(x + x1, y1, x2 - x1, y2 - y1,
Color_selection);
}
x += e.full_width();
}
}