mirror of https://github.com/zulip/zulip.git
80 lines
2.2 KiB
JavaScript
80 lines
2.2 KiB
JavaScript
let actively_scrolling = false;
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let loading_more_messages_indicator_showing = false;
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exports.show_loading_older = function () {
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if (!loading_more_messages_indicator_showing) {
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loading.make_indicator($('#loading_more_messages_indicator'),
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{abs_positioned: true});
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loading_more_messages_indicator_showing = true;
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floating_recipient_bar.hide();
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}
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};
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exports.hide_loading_older = function () {
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if (loading_more_messages_indicator_showing) {
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loading.destroy_indicator($("#loading_more_messages_indicator"));
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loading_more_messages_indicator_showing = false;
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}
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};
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exports.hide_indicators = function () {
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exports.hide_loading_older();
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};
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exports.actively_scrolling = function () {
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return actively_scrolling;
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};
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exports.scroll_finished = function () {
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actively_scrolling = false;
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if (!$('#home').hasClass('active')) {
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return;
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}
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if (!pointer.suppress_scroll_pointer_update) {
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message_viewport.keep_pointer_in_view();
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} else {
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pointer.set_suppress_scroll_pointer_update(false);
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}
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floating_recipient_bar.update();
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if (message_viewport.at_top()) {
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message_fetch.maybe_load_older_messages({
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msg_list: current_msg_list,
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show_loading: exports.show_loading_older,
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hide_loading: exports.hide_loading_older,
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});
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}
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if (message_viewport.at_bottom()) {
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message_fetch.maybe_load_newer_messages({
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msg_list: current_msg_list,
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});
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}
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// When the window scrolls, it may cause some messages to
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// enter the screen and become read. Calling
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// unread_ops.process_visible will update necessary
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// data structures and DOM elements.
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setTimeout(unread_ops.process_visible, 0);
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};
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let scroll_timer;
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function scroll_finish() {
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actively_scrolling = true;
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clearTimeout(scroll_timer);
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scroll_timer = setTimeout(exports.scroll_finished, 100);
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}
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exports.initialize = function () {
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message_viewport.message_pane.scroll(_.throttle(function () {
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unread_ops.process_visible();
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scroll_finish();
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}, 50));
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};
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window.message_scroll = exports;
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