d6a4e6e496
Establishes basic functionality for viewing conversations in two column mode, including message area and message list resizing, and maintaining scroll position. Various subviews need to be retooled but are more or less still functional, i.e., new message, message detail, key verification, etc...
57 lines
2.3 KiB
JavaScript
57 lines
2.3 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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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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'reset-scroll': 'resetScrollPosition'
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},
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measureScrollPosition: function() {
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this.scrollPosition = this.$el.scrollTop() + this.$el.outerHeight();
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this.scrollHeight = this.el.scrollHeight;
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this.shouldStickToBottom = this.scrollPosition === this.scrollHeight;
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},
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resetScrollPosition: function() {
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var scrollPosition = this.scrollPosition;
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if (this.scrollHeight !== this.el.scrollHeight) {
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scrollPosition = this.el.scrollHeight * this.scrollPosition / this.scrollHeight;
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}
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this.$el.scrollTop(scrollPosition - this.$el.outerHeight());
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},
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scrollToBottomIfNeeded: function() {
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if (this.shouldStickToBottom) {
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this.$el.scrollTop(this.scrollHeight);
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}
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},
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scrollToBottom: function() {
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// TODO: Avoid scrolling if user has manually scrolled up?
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this.$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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