xmpp.chapril.org-conversejs/src/converse-chatview.js
JC Brand c5383ac22f chatview: trigger 'add' event when fetching messages
Otherwise they don't appear when reloading the page.

I'm not completely happy with the resulting workaround to avoid that messages
restored from sessionStorage increment the unread messages counter, but it'll
have to do for now.
2017-05-15 18:37:54 +02:00

921 lines
42 KiB
JavaScript

// Converse.js (A browser based XMPP chat client)
// http://conversejs.org
//
// Copyright (c) 2012-2017, Jan-Carel Brand <jc@opkode.com>
// Licensed under the Mozilla Public License (MPLv2)
//
/*global define */
(function (root, factory) {
define([
"converse-core",
"tpl!chatbox",
"tpl!new_day",
"tpl!action",
"tpl!message",
"tpl!help_message",
"tpl!toolbar",
"tpl!avatar"
], factory);
}(this, function (
converse,
tpl_chatbox,
tpl_new_day,
tpl_action,
tpl_message,
tpl_help_message,
tpl_toolbar,
tpl_avatar
) {
"use strict";
var $ = converse.env.jQuery,
$msg = converse.env.$msg,
Backbone = converse.env.Backbone,
Strophe = converse.env.Strophe,
_ = converse.env._,
moment = converse.env.moment,
utils = converse.env.utils;
var KEY = {
ENTER: 13,
FORWARD_SLASH: 47
};
converse.plugins.add('converse-chatview', {
overrides: {
// Overrides mentioned here will be picked up by converse.js's
// plugin architecture they will replace existing methods on the
// relevant objects or classes.
//
// New functions which don't exist yet can also be added.
ChatBoxViews: {
onChatBoxAdded: function (item) {
var _converse = this.__super__._converse;
var view = this.get(item.get('id'));
if (!view) {
view = new _converse.ChatBoxView({model: item});
this.add(item.get('id'), view);
return view;
} else {
return this.__super__.onChatBoxAdded.apply(this, arguments);
}
}
}
},
initialize: function () {
/* The initialize function gets called as soon as the plugin is
* loaded by converse.js's plugin machinery.
*/
var _converse = this._converse,
__ = _converse.__;
this.updateSettings({
chatview_avatar_height: 32,
chatview_avatar_width: 32,
show_toolbar: true,
time_format: 'HH:mm',
visible_toolbar_buttons: {
'emoticons': true,
'call': false,
'clear': true
},
});
var onWindowStateChanged = function (data) {
var state = data.state;
_converse.chatboxviews.each(function (chatboxview) {
chatboxview.onWindowStateChanged(state);
})
};
_converse.api.listen.on('windowStateChanged', onWindowStateChanged);
_converse.ChatBoxView = Backbone.View.extend({
length: 200,
tagName: 'div',
className: 'chatbox hidden',
is_chatroom: false, // Leaky abstraction from MUC
events: {
'click .close-chatbox-button': 'close',
'keypress .chat-textarea': 'keyPressed',
'click .send-button': 'onSendButtonClicked',
'click .toggle-smiley': 'toggleEmoticonMenu',
'click .toggle-smiley ul li': 'insertEmoticon',
'click .toggle-clear': 'clearMessages',
'click .toggle-call': 'toggleCall',
'click .new-msgs-indicator': 'viewUnreadMessages'
},
initialize: function () {
this.model.messages.on('add', this.onMessageAdded, this);
this.model.on('show', this.show, this);
this.model.on('destroy', this.hide, this);
// TODO check for changed fullname as well
this.model.on('change:chat_state', this.sendChatState, this);
this.model.on('change:chat_status', this.onChatStatusChanged, this);
this.model.on('change:image', this.renderAvatar, this);
this.model.on('change:status', this.onStatusChanged, this);
this.model.on('showHelpMessages', this.showHelpMessages, this);
this.model.on('sendMessage', this.sendMessage, this);
this.render().fetchMessages();
_converse.emit('chatBoxInitialized', this);
},
render: function () {
this.$el.attr('id', this.model.get('box_id'))
.html(tpl_chatbox(
_.extend(this.model.toJSON(), {
show_toolbar: _converse.show_toolbar,
show_textarea: true,
show_send_button: _converse.show_send_button,
title: this.model.get('fullname'),
unread_msgs: __('You have unread messages'),
info_close: __('Close this chat box'),
label_personal_message: __('Personal message'),
label_send: __('Send')
}
)
)
);
this.$content = this.$el.find('.chat-content');
this.renderToolbar().renderAvatar();
_converse.emit('chatBoxOpened', this);
utils.refreshWebkit();
return this.showStatusMessage();
},
afterMessagesFetched: function () {
this.model.set('fetching_messages', false);
this.insertIntoDOM();
this.scrollDown();
// We only start listening for the scroll event after
// cached messages have been fetched
this.$content.on('scroll', this.markScrolled.bind(this));
},
fetchMessages: function () {
this.model.set('fetching_messages', true);
this.model.messages.fetch({
'add': true,
'success': this.afterMessagesFetched.bind(this),
'error': this.afterMessagesFetched.bind(this),
});
return this;
},
insertIntoDOM: function () {
/* This method gets overridden in src/converse-controlbox.js if
* the controlbox plugin is active.
*/
var container = document.querySelector('#conversejs');
if (this.el.parentNode !== container) {
container.insertBefore(this.el, container.firstChild);
}
return this;
},
clearStatusNotification: function () {
this.$content.find('div.chat-event').remove();
},
showStatusNotification: function (message, keep_old, permanent) {
if (!keep_old) {
this.clearStatusNotification();
}
var $el = $('<div class="chat-info"></div>').text(message);
if (!permanent) {
$el.addClass('chat-event');
}
this.$content.append($el);
this.scrollDown();
},
addSpinner: function () {
if (_.isNull(this.el.querySelector('.spinner'))) {
this.$content.prepend('<span class="spinner"/>');
}
},
clearSpinner: function () {
if (this.$content.children(':first').is('span.spinner')) {
this.$content.children(':first').remove();
}
},
insertDayIndicator: function (date, prepend) {
/* Appends (or prepends if "prepend" is truthy) an indicator
* into the chat area, showing the day as given by the
* passed in date.
*
* Parameters:
* (String) date - An ISO8601 date string.
*/
var day_date = moment(date).startOf('day');
var insert = prepend ? this.$content.prepend: this.$content.append;
insert.call(this.$content, tpl_new_day({
isodate: day_date.format(),
datestring: day_date.format("dddd MMM Do YYYY")
}));
},
insertMessage: function (attrs, prepend) {
/* Helper method which appends a message (or prepends if the
* 2nd parameter is set to true) to the end of the chat box's
* content area.
*
* Parameters:
* (Object) attrs: An object containing the message attributes.
*/
var that = this;
var insert = prepend ? this.$content.prepend : this.$content.append;
_.flow(
function ($el) {
insert.call(that.$content, $el);
return $el;
},
this.scrollDown.bind(this)
)(this.renderMessage(attrs));
},
showMessage: function (attrs) {
/* Inserts a chat message into the content area of the chat box.
* Will also insert a new day indicator if the message is on a
* different day.
*
* The message to show may either be newer than the newest
* message, or older than the oldest message.
*
* Parameters:
* (Object) attrs: An object containing the message
* attributes.
*/
var msg_dates, idx,
$first_msg = this.$content.find('.chat-message:first'),
first_msg_date = $first_msg.data('isodate'),
current_msg_date = moment(attrs.time) || moment,
last_msg_date = this.$content.find('.chat-message:last').data('isodate');
if (!first_msg_date) {
// This is the first received message, so we insert a
// date indicator before it.
this.insertDayIndicator(current_msg_date);
this.insertMessage(attrs);
return;
}
if (current_msg_date.isAfter(last_msg_date) ||
current_msg_date.isSame(last_msg_date)) {
// The new message is after the last message
if (current_msg_date.isAfter(last_msg_date, 'day')) {
// Append a new day indicator
this.insertDayIndicator(current_msg_date);
}
this.insertMessage(attrs);
return;
}
if (current_msg_date.isBefore(first_msg_date) ||
current_msg_date.isSame(first_msg_date)) {
// The message is before the first, but on the same day.
// We need to prepend the message immediately before the
// first message (so that it'll still be after the day
// indicator).
this.insertMessage(attrs, 'prepend');
if (current_msg_date.isBefore(first_msg_date, 'day')) {
// This message is also on a different day, so
// we prepend a day indicator.
this.insertDayIndicator(current_msg_date, 'prepend');
}
return;
}
// Find the correct place to position the message
current_msg_date = current_msg_date.format();
msg_dates = _.map(this.$content.find('.chat-message'), function (el) {
return $(el).data('isodate');
});
msg_dates.push(current_msg_date);
msg_dates.sort();
idx = msg_dates.indexOf(current_msg_date)-1;
_.flow(
function ($el) {
$el.insertAfter(
this.$content.find('.chat-message[data-isodate="'+msg_dates[idx]+'"]'));
return $el;
}.bind(this),
this.scrollDown.bind(this)
)(this.renderMessage(attrs));
},
getExtraMessageTemplateAttributes: function () {
/* Provides a hook for sending more attributes to the
* message template.
*
* Parameters:
* (Object) attrs: An object containing message attributes.
*/
return {};
},
getExtraMessageClasses: function (attrs) {
return attrs.delayed && 'delayed' || '';
},
renderMessage: function (attrs) {
/* Renders a chat message based on the passed in attributes.
*
* Parameters:
* (Object) attrs: An object containing the message attributes.
*
* Returns:
* The DOM element representing the message.
*/
var msg_time = moment(attrs.time) || moment,
text = attrs.message,
match = text.match(/^\/(.*?)(?: (.*))?$/),
fullname = this.model.get('fullname') || attrs.fullname,
template, username;
if ((match) && (match[1] === 'me')) {
text = text.replace(/^\/me/, '');
template = tpl_action;
if (attrs.sender === 'me') {
fullname = _converse.xmppstatus.get('fullname') || attrs.fullname;
username = _.isNil(fullname)? _converse.bare_jid: fullname;
} else {
username = attrs.fullname;
}
} else {
template = tpl_message;
username = attrs.sender === 'me' && __('me') || fullname;
}
this.$content.find('div.chat-event').remove();
if (text.length > 8000) {
text = text.substring(0, 10) + '...';
this.showStatusNotification(
__("A very large message has been received."+
"This might be due to an attack meant to degrade the chat performance."+
"Output has been shortened."),
true, true);
}
var $msg = $(template(
_.extend(this.getExtraMessageTemplateAttributes(attrs), {
'msgid': attrs.msgid,
'sender': attrs.sender,
'time': msg_time.format(_converse.time_format),
'isodate': msg_time.format(),
'username': username,
'extra_classes': this.getExtraMessageClasses(attrs)
})
));
$msg.find('.chat-msg-content').first()
.text(text)
.addHyperlinks()
.addEmoticons(_converse.visible_toolbar_buttons.emoticons);
return $msg;
},
showHelpMessages: function (msgs, type, spinner) {
var i, msgs_length = msgs.length;
for (i=0; i<msgs_length; i++) {
this.$content.append($(tpl_help_message({
'type': type||'info',
'message': msgs[i]
})));
}
if (spinner === true) {
this.$content.append('<span class="spinner"/>');
} else if (spinner === false) {
this.$content.find('span.spinner').remove();
}
return this.scrollDown();
},
handleChatStateMessage: function (message) {
if (message.get('chat_state') === _converse.COMPOSING) {
if (message.get('sender') === 'me') {
this.showStatusNotification(__('Typing from another device'));
} else {
this.showStatusNotification(message.get('fullname')+' '+__('is typing'));
}
this.clear_status_timeout = window.setTimeout(this.clearStatusNotification.bind(this), 30000);
} else if (message.get('chat_state') === _converse.PAUSED) {
if (message.get('sender') === 'me') {
this.showStatusNotification(__('Stopped typing on the other device'));
} else {
this.showStatusNotification(message.get('fullname')+' '+__('has stopped typing'));
}
} else if (_.includes([_converse.INACTIVE, _converse.ACTIVE], message.get('chat_state'))) {
this.$content.find('div.chat-event').remove();
} else if (message.get('chat_state') === _converse.GONE) {
this.showStatusNotification(message.get('fullname')+' '+__('has gone away'));
}
},
shouldShowOnTextMessage: function () {
return !this.$el.is(':visible');
},
updateNewMessageIndicators: function (message) {
/* We have two indicators of new messages. The unread messages
* counter, which shows the number of unread messages in
* the document.title, and the "new messages" indicator in
* a chat area, if it's scrolled up so that new messages
* aren't visible.
*
* In both cases we ignore MAM messages.
*/
if (!message.get('archive_id')) {
if (this.model.get('scrolled', true)) {
this.$el.find('.new-msgs-indicator').removeClass('hidden');
}
if (this.isNewMessageHidden()) {
this.model.incrementUnreadMsgCounter();
}
}
},
isNewMessageHidden: function () {
if (this.model.get('fetching_messages')) {
// We seem to be busy fetching sessionStorage archived
// messages, so the message is not considered new.
return false;
}
return _converse.windowState === 'hidden' || this.model.isScrolledUp();
},
handleTextMessage: function (message) {
this.showMessage(_.clone(message.attributes));
if (message.get('sender') !== 'me') {
this.updateNewMessageIndicators(message);
} else {
// We remove the "scrolled" flag so that the chat area
// gets scrolled down. We always want to scroll down
// when the user writes a message as opposed to when a
// message is received.
this.model.set('scrolled', false);
}
if (this.shouldShowOnTextMessage()) {
this.show();
} else {
this.scrollDown();
}
},
handleErrorMessage: function (message) {
var $message = $('[data-msgid='+message.get('msgid')+']');
if ($message.length) {
$message.after($('<div class="chat-info chat-error"></div>').text(message.get('message')));
this.scrollDown();
}
},
onMessageAdded: function (message) {
/* Handler that gets called when a new message object is created.
*
* Parameters:
* (Object) message - The message Backbone object that was added.
*/
if (!_.isUndefined(this.clear_status_timeout)) {
window.clearTimeout(this.clear_status_timeout);
delete this.clear_status_timeout;
}
if (message.get('type') === 'error') {
this.handleErrorMessage(message);
} else if (!message.get('message')) {
this.handleChatStateMessage(message);
} else {
this.handleTextMessage(message);
}
_converse.emit('messageAdded', {
'message': message,
'chatbox': this.model
});
},
createMessageStanza: function (message) {
return $msg({
from: _converse.connection.jid,
to: this.model.get('jid'),
type: 'chat',
id: message.get('msgid')
}).c('body').t(message.get('message')).up()
.c(_converse.ACTIVE, {'xmlns': Strophe.NS.CHATSTATES}).up();
},
sendMessage: function (message) {
/* Responsible for sending off a text message.
*
* Parameters:
* (Message) message - The chat message
*/
// TODO: We might want to send to specfic resources.
// Especially in the OTR case.
var messageStanza = this.createMessageStanza(message);
_converse.connection.send(messageStanza);
if (_converse.forward_messages) {
// Forward the message, so that other connected resources are also aware of it.
_converse.connection.send(
$msg({ to: _converse.bare_jid, type: 'chat', id: message.get('msgid') })
.c('forwarded', {xmlns:'urn:xmpp:forward:0'})
.c('delay', {xmns:'urn:xmpp:delay',stamp:(new Date()).getTime()}).up()
.cnode(messageStanza.tree())
);
}
},
onMessageSubmitted: function (text) {
/* This method gets called once the user has typed a message
* and then pressed enter in a chat box.
*
* Parameters:
* (string) text - The chat message text.
*/
if (!_converse.connection.authenticated) {
return this.showHelpMessages(
['Sorry, the connection has been lost, '+
'and your message could not be sent'],
'error'
);
}
var match = text.replace(/^\s*/, "").match(/^\/(.*)\s*$/), msgs;
if (match) {
if (match[1] === "clear") {
return this.clearMessages();
}
else if (match[1] === "help") {
msgs = [
'<strong>/help</strong>:'+__('Show this menu')+'',
'<strong>/me</strong>:'+__('Write in the third person')+'',
'<strong>/clear</strong>:'+__('Remove messages')+''
];
this.showHelpMessages(msgs);
return;
}
}
var fullname = _converse.xmppstatus.get('fullname');
fullname = _.isEmpty(fullname)? _converse.bare_jid: fullname;
var message = this.model.messages.create({
fullname: fullname,
sender: 'me',
time: moment().format(),
message: text
});
this.sendMessage(message);
},
sendChatState: function () {
/* Sends a message with the status of the user in this chat session
* as taken from the 'chat_state' attribute of the chat box.
* See XEP-0085 Chat State Notifications.
*/
_converse.connection.send(
$msg({'to':this.model.get('jid'), 'type': 'chat'})
.c(this.model.get('chat_state'), {'xmlns': Strophe.NS.CHATSTATES}).up()
.c('no-store', {'xmlns': Strophe.NS.HINTS}).up()
.c('no-permanent-store', {'xmlns': Strophe.NS.HINTS})
);
},
setChatState: function (state, no_save) {
/* Mutator for setting the chat state of this chat session.
* Handles clearing of any chat state notification timeouts and
* setting new ones if necessary.
* Timeouts are set when the state being set is COMPOSING or PAUSED.
* After the timeout, COMPOSING will become PAUSED and PAUSED will become INACTIVE.
* See XEP-0085 Chat State Notifications.
*
* Parameters:
* (string) state - The chat state (consts ACTIVE, COMPOSING, PAUSED, INACTIVE, GONE)
* (Boolean) no_save - Just do the cleanup or setup but don't actually save the state.
*/
if (!_.isUndefined(this.chat_state_timeout)) {
window.clearTimeout(this.chat_state_timeout);
delete this.chat_state_timeout;
}
if (state === _converse.COMPOSING) {
this.chat_state_timeout = window.setTimeout(
this.setChatState.bind(this), _converse.TIMEOUTS.PAUSED, _converse.PAUSED);
} else if (state === _converse.PAUSED) {
this.chat_state_timeout = window.setTimeout(
this.setChatState.bind(this), _converse.TIMEOUTS.INACTIVE, _converse.INACTIVE);
}
if (!no_save && this.model.get('chat_state') !== state) {
this.model.set('chat_state', state);
}
return this;
},
keyPressed: function (ev) {
/* Event handler for when a key is pressed in a chat box textarea.
*/
var textarea = ev.target, message;
if (ev.keyCode === KEY.ENTER) {
ev.preventDefault();
message = textarea.value;
textarea.value = '';
textarea.focus();
if (message !== '') {
this.onMessageSubmitted(message);
_converse.emit('messageSend', message);
}
this.setChatState(_converse.ACTIVE);
} else {
// Set chat state to composing if keyCode is not a forward-slash
// (which would imply an internal command and not a message).
this.setChatState(_converse.COMPOSING, ev.keyCode === KEY.FORWARD_SLASH);
}
},
onSendButtonClicked: function(ev) {
/* Event handler for when a send button is clicked in a chat box textarea.
*/
ev.preventDefault();
var textarea = this.el.querySelector('.chat-textarea'),
message = textarea.value;
textarea.value = '';
textarea.focus();
if (message !== '') {
this.onMessageSubmitted(message);
_converse.emit('messageSend', message);
}
this.setChatState(_converse.ACTIVE);
},
clearMessages: function (ev) {
if (ev && ev.preventDefault) { ev.preventDefault(); }
var result = confirm(__("Are you sure you want to clear the messages from this chat box?"));
if (result === true) {
this.$content.empty();
this.model.messages.reset();
this.model.messages.browserStorage._clear();
}
return this;
},
insertIntoTextArea: function (value) {
var $textbox = this.$el.find('textarea.chat-textarea');
var existing = $textbox.val();
if (existing && (existing[existing.length-1] !== ' ')) {
existing = existing + ' ';
}
$textbox.focus().val(existing+value+' ');
},
insertEmoticon: function (ev) {
ev.stopPropagation();
this.$el.find('.toggle-smiley ul').slideToggle(200);
var $target = $(ev.target);
$target = $target.is('a') ? $target : $target.children('a');
this.insertIntoTextArea($target.data('emoticon'));
},
toggleEmoticonMenu: function (ev) {
ev.stopPropagation();
this.$el.find('.toggle-smiley ul').slideToggle(200);
},
toggleCall: function (ev) {
ev.stopPropagation();
_converse.emit('callButtonClicked', {
connection: _converse.connection,
model: this.model
});
},
onChatStatusChanged: function (item) {
var chat_status = item.get('chat_status'),
fullname = item.get('fullname');
fullname = _.isEmpty(fullname)? item.get('jid'): fullname;
if (this.$el.is(':visible')) {
if (chat_status === 'offline') {
this.showStatusNotification(fullname+' '+__('has gone offline'));
} else if (chat_status === 'away') {
this.showStatusNotification(fullname+' '+__('has gone away'));
} else if ((chat_status === 'dnd')) {
this.showStatusNotification(fullname+' '+__('is busy'));
} else if (chat_status === 'online') {
this.$el.find('div.chat-event').remove();
}
}
},
onStatusChanged: function (item) {
this.showStatusMessage();
_converse.emit('contactStatusMessageChanged', {
'contact': item.attributes,
'message': item.get('status')
});
},
showStatusMessage: function (msg) {
msg = msg || this.model.get('status');
if (_.isString(msg)) {
this.$el.find('p.user-custom-message').text(msg).attr('title', msg);
}
return this;
},
close: function (ev) {
if (ev && ev.preventDefault) { ev.preventDefault(); }
if (_converse.connection.connected) {
// Immediately sending the chat state, because the
// model is going to be destroyed afterwards.
this.model.set('chat_state', _converse.INACTIVE);
this.sendChatState();
}
try {
this.model.destroy();
} catch (e) {
_converse.log(e);
}
this.remove();
_converse.emit('chatBoxClosed', this);
return this;
},
getToolbarOptions: function (options) {
return _.extend(options || {}, {
'label_clear': __('Clear all messages'),
'label_insert_smiley': __('Insert a smiley'),
'label_start_call': __('Start a call'),
'show_call_button': _converse.visible_toolbar_buttons.call,
'show_clear_button': _converse.visible_toolbar_buttons.clear,
'show_emoticons': _converse.visible_toolbar_buttons.emoticons,
});
},
renderToolbar: function (toolbar, options) {
if (!_converse.show_toolbar) { return; }
toolbar = toolbar || tpl_toolbar;
options = _.extend(
this.model.toJSON(),
this.getToolbarOptions(options || {})
);
this.$el.find('.chat-toolbar').html(toolbar(options));
return this;
},
renderAvatar: function () {
if (!this.model.get('image')) {
return;
}
var width = _converse.chatview_avatar_width;
var height = _converse.chatview_avatar_height;
var img_src = 'data:'+this.model.get('image_type')+';base64,'+this.model.get('image'),
canvas = $(tpl_avatar({
'width': width,
'height': height
})).get(0);
if (!(canvas.getContext && canvas.getContext('2d'))) {
return this;
}
var ctx = canvas.getContext('2d');
var img = new Image(); // Create new Image object
img.onload = function () {
var ratio = img.width/img.height;
if (ratio < 1) {
ctx.drawImage(img, 0,0, width, height*(1/ratio));
} else {
ctx.drawImage(img, 0,0, width, height*ratio);
}
};
img.src = img_src;
this.$el.find('.chat-title').before(canvas);
return this;
},
focus: function () {
this.$el.find('.chat-textarea').focus();
_converse.emit('chatBoxFocused', this);
return this;
},
hide: function () {
this.el.classList.add('hidden');
utils.refreshWebkit();
return this;
},
afterShown: function (focus) {
if (_converse.connection.connected) {
// Without a connection, we haven't yet initialized
// localstorage
this.model.save();
}
this.setChatState(_converse.ACTIVE);
this.scrollDown();
if (focus) {
this.focus();
}
},
_show: function (focus) {
/* Inner show method that gets debounced */
if (this.$el.is(':visible') && this.$el.css('opacity') === "1") {
if (focus) { this.focus(); }
return;
}
utils.fadeIn(this.el, _.bind(this.afterShown, this, focus));
},
show: function (focus) {
if (_.isUndefined(this.debouncedShow)) {
/* We wrap the method in a debouncer and set it on the
* instance, so that we have it debounced per instance.
* Debouncing it on the class-level is too broad.
*/
this.debouncedShow = _.debounce(this._show, 250, {'leading': true});
}
this.debouncedShow.apply(this, arguments);
return this;
},
hideNewMessagesIndicator: function () {
var new_msgs_indicator = this.el.querySelector('.new-msgs-indicator');
if (!_.isNull(new_msgs_indicator)) {
new_msgs_indicator.classList.add('hidden');
}
},
markScrolled: _.debounce(function (ev) {
/* Called when the chat content is scrolled up or down.
* We want to record when the user has scrolled away from
* the bottom, so that we don't automatically scroll away
* from what the user is reading when new messages are
* received.
*/
if (ev && ev.preventDefault) { ev.preventDefault(); }
if (this.model.get('auto_scrolled')) {
this.model.set({
'scrolled': false,
'auto_scrolled': false
});
return;
}
var is_at_bottom =
(this.$content.scrollTop() + this.$content.innerHeight()) >=
this.$content[0].scrollHeight-10;
if (is_at_bottom) {
this.model.save('scrolled', false);
this.onScrolledDown();
} else {
// We're not at the bottom of the chat area, so we mark
// that the box is in a scrolled-up state.
this.model.save('scrolled', true);
}
}, 150),
viewUnreadMessages: function () {
this.model.save('scrolled', false);
this.scrollDown();
},
_scrollDown: function () {
/* Inner method that gets debounced */
if (this.$content.is(':visible') && !this.model.get('scrolled')) {
this.$content.scrollTop(this.$content[0].scrollHeight);
this.onScrolledDown();
this.model.save({'auto_scrolled': true});
}
},
onScrolledDown: function() {
this.hideNewMessagesIndicator();
if (_converse.windowState !== 'hidden') {
this.model.clearUnreadMsgCounter();
}
_converse.emit('chatBoxScrolledDown', {'chatbox': this.model});
},
scrollDown: function () {
if (_.isUndefined(this.debouncedScrollDown)) {
/* We wrap the method in a debouncer and set it on the
* instance, so that we have it debounced per instance.
* Debouncing it on the class-level is too broad.
*/
this.debouncedScrollDown = _.debounce(this._scrollDown, 250);
}
this.debouncedScrollDown.apply(this, arguments);
return this;
},
onWindowStateChanged: function (state) {
if (this.model.get('num_unread', 0) && !this.isNewMessageHidden()) {
this.model.clearUnreadMsgCounter();
}
}
});
}
});
return converse;
}));