9e79ecddf8
Fix bug: Open thread A, open thread B, receive message in thread A, open thread A. Scroll bar has reset to the top.
64 lines
2.5 KiB
JavaScript
64 lines
2.5 KiB
JavaScript
/* vim: ts=4:sw=4:expandtab
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
(function () {
|
|
'use strict';
|
|
window.Whisper = window.Whisper || {};
|
|
|
|
Whisper.MessageListView = Whisper.ListView.extend({
|
|
tagName: 'ul',
|
|
className: 'message-list',
|
|
itemView: Whisper.MessageView,
|
|
events: {
|
|
'add': 'onAdd',
|
|
'update *': 'scrollToBottom',
|
|
'scroll': 'measureScrollPosition',
|
|
'reset-scroll': 'resetScrollPosition'
|
|
},
|
|
onAdd: function() {
|
|
this.$el.removeClass('loading');
|
|
this.scrollToBottom();
|
|
},
|
|
measureScrollPosition: function() {
|
|
if (this.el.scrollHeight === 0) { // hidden
|
|
return;
|
|
}
|
|
this.scrollPosition = this.$el.scrollTop() + this.$el.outerHeight();
|
|
this.scrollHeight = this.el.scrollHeight;
|
|
this.shouldStickToBottom = this.scrollPosition === this.scrollHeight;
|
|
},
|
|
resetScrollPosition: function() {
|
|
var scrollPosition = this.scrollPosition;
|
|
if (this.scrollHeight !== this.el.scrollHeight) {
|
|
scrollPosition = this.el.scrollHeight * this.scrollPosition / this.scrollHeight;
|
|
}
|
|
this.$el.scrollTop(scrollPosition - this.$el.outerHeight());
|
|
},
|
|
scrollToBottomIfNeeded: function() {
|
|
if (this.shouldStickToBottom) {
|
|
this.$el.scrollTop(this.scrollHeight);
|
|
}
|
|
},
|
|
scrollToBottom: function() {
|
|
// TODO: Avoid scrolling if user has manually scrolled up?
|
|
this.$el.scrollTop(this.el.scrollHeight);
|
|
this.measureScrollPosition();
|
|
},
|
|
addAll: function() {
|
|
Whisper.ListView.prototype.addAll.apply(this, arguments); // super()
|
|
this.scrollToBottom();
|
|
}
|
|
});
|
|
})();
|