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https://github.com/zulip/zulip.git
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084ef0bea9
Note from tabbott: This is a somewhat surprising feature to be adding this late in Zulip's development, but the model we've had of what narrows are easy to access via clicking around has meant that it was fairly difficult to get into a narrow that didn't include the very latest messages in that narrow. Fixes #3465.
89 lines
2.3 KiB
JavaScript
89 lines
2.3 KiB
JavaScript
var message_scroll = (function () {
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var exports = {};
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var actively_scrolling = false;
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var 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.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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var 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(50, function () {
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unread_ops.process_visible();
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scroll_finish();
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}));
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};
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return exports;
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}());
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if (typeof module !== 'undefined') {
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module.exports = message_scroll;
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}
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