Avoid bleeding of inset background outside of inset

As a consequence of fix e64ea357 to ticket #10797, we draw a bit too
much of the inset background outside of the inset (visible for insets
with colored background). #10797 is a ticket that triggers when the
cursor has a width larger than 1.

This patch limits the problems in two respects

* nothing is done on the left, since the cursor width only expands on
  the right.

* on the right, the extra width is limited to cursor width.

Fixes bug #11786.

(cherry picked from commit eb92f74d1f)
This commit is contained in:
Jean-Marc Lasgouttes 2020-03-24 12:01:43 +01:00
parent dd76f4756f
commit ee7c607b5e
2 changed files with 11 additions and 9 deletions

View File

@ -1919,15 +1919,15 @@ void TextMetrics::drawParagraph(PainterInfo & pi, pit_type const pit, int const
LYXERR(Debug::PAINTING, "Clear rect@("
<< max(row_x, 0) << ", " << y - row.ascent() << ")="
<< width() << " x " << row.height());
// FIXME: this is a hack. We know that at least this
// amount of pixels can be cleared on right and left.
// Doing so gets rid of caret ghosts when the cursor is at
// the begining/end of row. However, it will not work if
// the caret has a ridiculous width like 6. (see ticket
// #10797)
pi.pain.fillRectangle(max(row_x, 0) - Inset::TEXT_TO_INSET_OFFSET,
y - row.ascent(),
width() + 2 * Inset::TEXT_TO_INSET_OFFSET,
// FIXME: this is a hack. We clear an amount equal to
// cursor width. This will not work if the caret has a
// ridiculous width like 6. (see ticket #10797)
// This is the same formula as in GuiWorkArea.
int const caret_width = lyxrc.cursor_width
? lyxrc.cursor_width
: 1 + int((lyxrc.currentZoom + 50) / 200.0);
pi.pain.fillRectangle(max(row_x, 0), y - row.ascent(),
width() + caret_width,
row.height(), pi.background_color);
}

View File

@ -86,6 +86,8 @@ What's new
- Add copy, paste, etc, to math context menu (but 11799).
- Avoid bleeding of inset background outside of inset (bug 11786).
* INTERNALS