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Code Issues Releases Wiki Activity

Implement nice stories list scrolling.

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This commit is contained in:
John Preston
2023-05-23 20:13:02 +04:00
parent 1d27c8c940
commit 16128d61c0
8 changed files with 248 additions and 29 deletions
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45
Telegram/SourceFiles/dialogs/dialogs_inner_widget.cpp
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@@ -142,7 +142,7 @@ InnerWidget::InnerWidget(
, _stories(std::make_unique<Stories::List>(
this,
Stories::ContentForSession(&controller->session()),
[=] { return st::dialogsStoriesFull.height - _visibleTop; }))
[=] { return _stories->height() - _visibleTop; }))
, _shownList(controller->session().data().chatsList()->indexed())
, _st(&st::defaultDialogRow)
, _pinnedShiftAnimation([=](crl::time now) {
@@ -323,6 +323,18 @@ InnerWidget::InnerWidget(
switchToFilter(filterId);
}, lifetime());
_stories->heightValue(
) | rpl::filter([=] {
return (_viewportHeight > 0) && (defaultScrollTop() > _visibleTop);
}) | rpl::start_with_next([=] {
jumpToTop();
}, lifetime());
_stories->entered(
) | rpl::start_with_next([=] {
clearSelection();
}, lifetime());
handleChatListEntryRefreshes();
refreshWithCollapsedRows(true);
@@ -428,6 +440,16 @@ int InnerWidget::dialogsOffset() const {
- skipTopHeight();
}
rpl::producer<> InnerWidget::scrollToVeryTopRequests() const {
return _stories->expandRequests();
}
int InnerWidget::defaultScrollTop() const {
return storiesShown()
? std::max(_stories->height() - st::dialogsStories.height, 0)
: 0;
}
int InnerWidget::fixedOnTopCount() const {
auto result = 0;
for (const auto &row : *_shownList) {
@@ -1699,6 +1721,15 @@ void InnerWidget::mousePressReleased(
}
}
void InnerWidget::setViewportHeight(int viewportHeight) {
if (_viewportHeight != viewportHeight) {
_viewportHeight = viewportHeight;
if (height() < defaultScrollTop() + viewportHeight) {
refresh();
}
}
}
void InnerWidget::setCollapsedPressed(int pressed) {
if (_collapsedPressed != pressed) {
if (_collapsedPressed >= 0) {
@@ -2745,10 +2776,13 @@ void InnerWidget::refresh(bool toTop) {
h = searchedOffset() + (_searchResults.size() * _st->height);
}
}
if (const auto storiesSkip = defaultScrollTop()) {
accumulate_max(h, storiesSkip + _viewportHeight);
}
resize(width(), h);
if (toTop) {
stopReorderPinned();
_mustScrollTo.fire({ 0, 0 });
jumpToTop();
preloadRowsData();
}
_controller->setDialogsListDisplayForced(
@@ -3226,7 +3260,7 @@ void InnerWidget::switchToFilter(FilterId filterId) {
filterId = 0;
}
if (_filterId == filterId) {
_mustScrollTo.fire({ 0, 0 });
jumpToTop();
return;
}
saveChatsFilterScrollState(_filterId);
@@ -3251,6 +3285,11 @@ void InnerWidget::switchToFilter(FilterId filterId) {
}
}
void InnerWidget::jumpToTop() {
const auto to = defaultScrollTop();
_mustScrollTo.fire({ to, -1 });
}
void InnerWidget::saveChatsFilterScrollState(FilterId filterId) {
_chatsFilterScrollStates[filterId] = -y();
}