mirror of
https://github.com/oxen-io/session-desktop.git
synced 2023-12-14 02:12:57 +01:00
53 lines
1.9 KiB
JavaScript
53 lines
1.9 KiB
JavaScript
/* vim: ts=4:sw=4:expandtab
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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(function () {
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'use strict';
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window.Whisper = window.Whisper || {};
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var scrollPosition,
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scrollHeight,
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shouldStickToBottom;
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Whisper.MessageListView = Whisper.ListView.extend({
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tagName: 'ul',
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className: 'message-list',
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itemView: Whisper.MessageView,
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events: {
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'add': 'scrollToBottom',
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'update *': 'scrollToBottom',
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'scroll': 'measureScrollPosition'
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},
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measureScrollPosition: function() {
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scrollPosition = this.$el.scrollTop() + this.$el.outerHeight();
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scrollHeight = this.el.scrollHeight;
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shouldStickToBottom = scrollPosition === scrollHeight;
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},
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scrollToBottomIfNeeded: function() {
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if (shouldStickToBottom) {
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this.$el.scrollTop(scrollHeight);
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}
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},
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scrollToBottom: function() {
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// TODO: Avoid scrolling if user has manually scrolled up?
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this.$el.scrollTop(this.el.scrollHeight);
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this.measureScrollPosition();
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},
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addAll: function() {
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Whisper.ListView.prototype.addAll.apply(this, arguments); // super()
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this.scrollToBottom();
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}
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});
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})();
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