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Make paragraph-goto and friends set paragraph to the top

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Add parameter 'force' to scrollToCursor(...) to avoid the case where the
cursor is not set to top because it is already visible on screen.
Change screen offset in this method so that the paragraph is really at
the top of the screen. This part may cause unforeseen issues and needs care.

gotoInset: use the new force flag and do not trigger a redraw.
Instead, return a boolean telling whether redraw is needed.
In the code that use it, set an update flag instead of the extra redraw.

In the handling of paragraph-goto, also set the update flag instead of
triggering a repaint.

Remove Bufferview::scrollToCursor(), which was equivalent to showCursor().

Fixes bug #10425.
This commit is contained in:
Jean-Marc Lasgouttes 2021-02-17 12:30:16 +01:00
parent a9119c3fa8
commit 42abb26054
3 changed files with 27 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
src/BufferView.cpp
View File

@ -171,18 +171,18 @@ bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
/// Moves cursor to the next inset with one of the given codes.
void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
bool gotoInset(BufferView * bv, vector<InsetCode> const & codes,
bool same_content)
{
Cursor tmpcur = bv->cursor();
if (!findInset(tmpcur, codes, same_content)) {
bv->cursor().message(_("No more insets"));
return;
return false;
}
tmpcur.clearSelection();
bv->setCursor(tmpcur);
bv->showCursor();
return bv->scrollToCursor(bv->cursor(), false, true);
}
@ -541,13 +541,13 @@ void BufferView::processUpdateFlags(Update::flags flags)
if (needsFitCursor()) {
// First try to make the selection start visible
// (which is just the cursor when there is no selection)
scrollToCursor(d->cursor_.selectionBegin(), false);
scrollToCursor(d->cursor_.selectionBegin(), false, false);
// Metrics have to be recomputed (maybe again)
updateMetrics();
// Is the cursor visible? (only useful if cursor is at end of selection)
if (needsFitCursor()) {
// then try to make cursor visible instead
scrollToCursor(d->cursor_, false);
scrollToCursor(d->cursor_, false, false);
// Metrics have to be recomputed (maybe again)
updateMetrics(flags);
}
@ -741,7 +741,7 @@ void BufferView::scrollDocView(int const pixels, bool update)
// cut off at the top
if (pixels <= d->scrollbarParameters_.min) {
DocIterator dit = doc_iterator_begin(&buffer_);
showCursor(dit, false, update);
showCursor(dit, false, false, update);
LYXERR(Debug::SCROLLING, "scroll to top");
return;
}
@ -750,7 +750,7 @@ void BufferView::scrollDocView(int const pixels, bool update)
if (pixels >= d->scrollbarParameters_.max) {
DocIterator dit = doc_iterator_end(&buffer_);
dit.backwardPos();
showCursor(dit, false, update);
showCursor(dit, false, false, update);
LYXERR(Debug::SCROLLING, "scroll to bottom");
return;
}
@ -775,7 +775,7 @@ void BufferView::scrollDocView(int const pixels, bool update)
DocIterator dit = doc_iterator_begin(&buffer_);
dit.pit() = i;
LYXERR(Debug::SCROLLING, "pixels = " << pixels << " -> scroll to pit " << i);
showCursor(dit, false, update);
showCursor(dit, false, false, update);
}
@ -961,32 +961,25 @@ int BufferView::workWidth() const
void BufferView::recenter()
{
showCursor(d->cursor_, true, true);
showCursor(d->cursor_, true, false, true);
}
void BufferView::showCursor()
{
showCursor(d->cursor_, false, true);
showCursor(d->cursor_, false, false, true);
}
void BufferView::showCursor(DocIterator const & dit,
bool recenter, bool update)
bool recenter, bool force, bool update)
{
if (scrollToCursor(dit, recenter) && update)
if (scrollToCursor(dit, recenter, force) && update)
processUpdateFlags(Update::Force);
}
void BufferView::scrollToCursor()
{
if (scrollToCursor(d->cursor_, false))
processUpdateFlags(Update::Force);
}
bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter, bool force)
{
// We are not properly started yet, delay until resizing is done.
if (height_ == 0)
@ -1014,7 +1007,7 @@ bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
else if (bot_pit == tm.last().first + 1)
tm.newParMetricsDown();
if (tm.contains(bot_pit)) {
if (tm.contains(bot_pit) && !force) {
ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
LBUFERR(!pm.rows().empty());
// FIXME: smooth scrolling doesn't work in mathed.
@ -1078,9 +1071,9 @@ bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
else if (d->anchor_pit_ == max_pit)
d->anchor_ypos_ = height_ - offset - row_dim.descent();
else if (offset > height_)
d->anchor_ypos_ = height_ - offset - defaultRowHeight();
d->anchor_ypos_ = height_ - offset - row_dim.descent();
else
d->anchor_ypos_ = defaultRowHeight() * 2;
d->anchor_ypos_ = row_dim.ascent();
return true;
}
@ -1586,8 +1579,8 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
success = setCursorFromEntries({id, pos},
{id_end, pos_end});
}
if (success)
dr.screenUpdate(Update::Force | Update::FitCursor);
if (success && scrollToCursor(d->cursor_, false, true))
dr.screenUpdate(Update::Force);
} else {
// Switch to other buffer view and resend cmd
lyx::dispatch(FuncRequest(
@ -1600,19 +1593,13 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
}
case LFUN_NOTE_NEXT:
gotoInset(this, { NOTE_CODE }, false);
// FIXME: if SinglePar is changed to act on the inner
// paragraph, this will not be OK anymore. The update is
// useful for auto-open collapsible insets.
dr.screenUpdate(Update::SinglePar | Update::FitCursor);
if (gotoInset(this, { NOTE_CODE }, false))
dr.screenUpdate(Update::Force);
break;
case LFUN_REFERENCE_NEXT: {
gotoInset(this, { LABEL_CODE, REF_CODE }, true);
// FIXME: if SinglePar is changed to act on the inner
// paragraph, this will not be OK anymore. The update is
// useful for auto-open collapsible insets.
dr.screenUpdate(Update::SinglePar | Update::FitCursor);
if (gotoInset(this, { LABEL_CODE, REF_CODE }, true))
dr.screenUpdate(Update::Force);
break;
}

8
src/BufferView.h
View File

@ -205,13 +205,13 @@ public:
/// This method will automatically scroll and update the BufferView
/// (metrics+drawing) if needed.
/// \param recenter Whether the cursor should be centered on screen
void showCursor(DocIterator const & dit, bool recenter,
/// \param force If true, disregard current position
void showCursor(DocIterator const & dit, bool recenter, bool force,
bool update);
/// Scroll to the cursor.
void scrollToCursor();
/// Scroll to the cursor.
/// \param recenter Whether the cursor should be centered on screen
bool scrollToCursor(DocIterator const & dit, bool recenter);
/// \param force If true, disregard current position
bool scrollToCursor(DocIterator const & dit, bool recenter, bool force);
/// scroll down document by the given number of pixels.
int scrollDown(int pixels);
/// scroll up document by the given number of pixels.

2
src/frontends/qt/GuiWorkArea.cpp
View File

@ -464,7 +464,7 @@ void GuiWorkArea::Private::resizeBufferView()
bool const caret_in_view = buffer_view_->caretInView();
buffer_view_->resize(p->viewport()->width(), p->viewport()->height());
if (caret_in_view)
buffer_view_->scrollToCursor();
buffer_view_->showCursor();
resetCaret();
// Update scrollbars which might have changed due different