mirror of
https://github.com/AyuGram/AyuGramDesktop.git
synced 2026-08-06 20:03:12 +00:00
John Preston
112 lines
2.6 KiB
C++
112 lines
2.6 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "dialogs/dialogs_community_rows_view.h"
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#include "data/data_forum.h"
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#include "dialogs/dialogs_row.h"
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#include "history/history.h"
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namespace Dialogs {
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CommunityRowsView::CommunityRowsView() = default;
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CommunityRowsView::~CommunityRowsView() = default;
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void CommunityRowsView::setRepaint(Fn<void()> repaint) {
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_repaint = std::move(repaint);
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}
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void CommunityRowsView::clear() {
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_rows.clear();
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_tops.clear();
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_forumsLifetime.destroy();
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}
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void CommunityRowsView::add(not_null<History*> history, float64 narrowRatio) {
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if (const auto forum = history->peer->forum()) {
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forum->preloadTopics();
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if (_repaint) {
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forum->chatsListChanges(
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) | rpl::on_next(_repaint, _forumsLifetime);
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}
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}
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auto row = std::make_unique<Row>(Key(history), 0, 0);
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row->recountHeight(narrowRatio, FilterId());
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_rows.push_back(std::move(row));
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}
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void CommunityRowsView::finalize() {
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_tops.resize(_rows.size() + 1);
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auto top = 0;
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for (auto i = 0, count = int(_rows.size()); i != count; ++i) {
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_tops[i] = top;
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top += _rows[i]->height();
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}
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_tops.back() = top;
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}
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void CommunityRowsView::recountHeights(float64 narrowRatio) {
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for (const auto &row : _rows) {
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row->recountHeight(narrowRatio, FilterId());
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}
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finalize();
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}
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int CommunityRowsView::height() const {
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return _tops.empty() ? 0 : _tops.back();
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}
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int CommunityRowsView::indexByY(int y) const {
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if (_tops.empty() || y < 0 || y >= _tops.back()) {
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return -1;
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}
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const auto i = std::upper_bound(begin(_tops), end(_tops), y);
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return int(i - begin(_tops)) - 1;
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}
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int CommunityRowsView::rowTop(int index) const {
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Expects(index >= 0 && index < int(_rows.size()));
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return _tops[index];
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}
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Row *CommunityRowsView::rowAt(int index) const {
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return (index >= 0 && index < int(_rows.size()))
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? _rows[index].get()
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: nullptr;
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}
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bool CommunityRowsView::contains(not_null<History*> history) const {
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for (const auto &row : _rows) {
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if (row->history() == history) {
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return true;
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}
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}
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return false;
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}
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void CommunityRowsView::paint(
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Painter &p,
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QRect clip,
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Fn<void(not_null<Row*>, int index, int top)> paintRow) const {
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if (_rows.empty() || clip.top() >= height()) {
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return;
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}
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const auto from = std::max(indexByY(clip.top()), 0);
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const auto bottom = clip.top() + clip.height();
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for (auto i = from, count = int(_rows.size()); i != count; ++i) {
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const auto top = _tops[i];
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if (top >= bottom) {
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break;
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}
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paintRow(_rows[i].get(), i, top);
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}
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}
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} // namespace Dialogs
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