mirrors/signal-desktop
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages 2 Wiki Activity Actions

Scroll down button: when scrolled up, or new non-visible message

Browse source 
FREEBIE
This commit is contained in:
Scott Nonnenberg 2017-05-18 18:33:35 -07:00
parent 13322c7071
commit 4c7bfbe9ff
12 changed files with 249 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

21
js/views/message_list_view.js
View file

@ -17,18 +17,24 @@
if (this.$el.scrollTop() === 0) {
this.$el.trigger('loadMore');
}
if (this.bottomOffset === 0) {
this.$el.trigger('atBottom');
} else if (this.bottomOffset > this.outerHeight) {
this.$el.trigger('farFromBottom');
}
},
measureScrollPosition: function() {
if (this.el.scrollHeight === 0) { // hidden
return;
}
this.scrollPosition = this.$el.scrollTop() + this.$el.outerHeight();
this.outerHeight = this.$el.outerHeight();
this.scrollPosition = this.$el.scrollTop() + this.outerHeight;
this.scrollHeight = this.el.scrollHeight;
this.shouldStickToBottom = this.scrollPosition === this.scrollHeight;
if (this.shouldStickToBottom) {
this.bottomOffset = 0;
} else {
this.bottomOffset = this.scrollHeight - this.$el.scrollTop();
this.bottomOffset = this.scrollHeight - this.$el.scrollTop() - this.$el.outerHeight();
}
},
resetScrollPosition: function() {
@ -36,10 +42,13 @@
},
scrollToBottomIfNeeded: function() {
if (this.bottomOffset === 0) {
this.$el.scrollTop(this.el.scrollHeight);
this.measureScrollPosition();
this.scrollToBottom();
}
},
scrollToBottom: function() {
this.$el.scrollTop(this.el.scrollHeight);
this.measureScrollPosition();
},
addOne: function(model) {
var view;
if (model.isExpirationTimerUpdate()) {
@ -54,6 +63,10 @@
var index = this.collection.indexOf(model);
this.measureScrollPosition();
if (model.get('unread') && this.bottomOffset > 0) {
this.$el.trigger('newOffscreenMessage');
}
if (index === this.collection.length - 1) {
// add to the bottom.
this.$el.append(view.el);