mirror of https://github.com/zulip/zulip.git
496 lines
16 KiB
JavaScript
496 lines
16 KiB
JavaScript
/*jslint nomen: true */
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function MessageList(table_name, filter, opts) {
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_.extend(this, {
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collapse_messages: true,
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muting_enabled: true,
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summarize_read: false
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}, opts);
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this.view = new MessageListView(this, table_name, this.collapse_messages);
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if (this.muting_enabled) {
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this._all_items = [];
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}
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this._items = [];
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this._hash = {};
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this.table_name = table_name;
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this.filter = filter;
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this._selected_id = -1;
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if (this.filter === undefined) {
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this.filter = new Filter();
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}
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this.narrowed = false;
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if (this.table_name === "zfilt") {
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this.narrowed = true;
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}
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this.num_appends = 0;
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this.min_id_exempted_from_summaries = -1;
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return this;
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}
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(function () {
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MessageList.prototype = {
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add_messages: function MessageList_add_messages(messages, messages_are_new) {
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var self = this;
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var predicate = self.filter.predicate();
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var top_messages = [];
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var bottom_messages = [];
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var interior_messages = [];
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// If we're initially populating the list, save the messages in
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// bottom_messages regardless
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if (self.selected_id() === -1 && self.empty()) {
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var narrow_messages = _.filter(messages, predicate);
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bottom_messages = _.reject(narrow_messages, function (msg) {
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return self.get(msg.id);
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});
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} else {
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_.each(messages, function (msg) {
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// Filter out duplicates that are already in self, and all messages
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// that fail our filter predicate
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if (! (self.get(msg.id) === undefined && predicate(msg))) {
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return;
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}
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// Put messages in correct order on either side of the message list
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if (self.empty() || msg.id > self.last().id) {
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bottom_messages.push(msg);
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} else if (msg.id < self.first().id) {
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top_messages.push(msg);
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} else {
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interior_messages.push(msg);
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}
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});
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}
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if (interior_messages.length > 0) {
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self.add_and_rerender(top_messages.concat(interior_messages).concat(bottom_messages));
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return true;
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}
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if (top_messages.length > 0) {
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self.prepend(top_messages);
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}
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if (bottom_messages.length > 0) {
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self.append(bottom_messages, messages_are_new);
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}
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if ((self === narrowed_msg_list) && !self.empty() &&
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(self.selected_id() === -1)) {
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// If adding some new messages to the message tables caused
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// our current narrow to no longer be empty, hide the empty
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// feed placeholder text.
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narrow.hide_empty_narrow_message();
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// And also select the newly arrived message.
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self.select_id(self.selected_id(), {then_scroll: true, use_closest: true});
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}
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},
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get: function MessageList_get(id) {
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id = parseInt(id, 10);
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if (isNaN(id)) {
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return undefined;
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}
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return this._hash[id];
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},
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get_messages: function MessageList_get_mesages() {
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return this._items;
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},
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num_items: function MessageList_num_items() {
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return this._items.length;
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},
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empty: function MessageList_empty() {
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return this._items.length === 0;
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},
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first: function MessageList_first() {
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return this._items[0];
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},
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last: function MessageList_last() {
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return this._items[this._items.length - 1];
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},
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nth_most_recent_id: function MessageList_nth_most_recent_id(n) {
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var i = this._items.length - n;
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if (i < 0) {
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return -1;
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} else {
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return this._items[i].id;
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}
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},
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clear: function MessageList_clear(opts) {
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opts = _.extend({clear_selected_id: true}, opts);
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if (this.muting_enabled) {
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this._all_items = [];
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}
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this._items = [];
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this._hash = {};
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this.view.clear_rendering_state(true);
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if (opts.clear_selected_id) {
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this._selected_id = -1;
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}
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},
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selected_id: function MessageList_selected_id() {
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return this._selected_id;
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},
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select_id: function MessageList_select_id(id, opts) {
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opts = _.extend({
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then_scroll: false,
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use_closest: false,
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mark_read: true
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}, opts, {
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id: id,
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msg_list: this,
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previously_selected: this._selected_id
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});
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id = parseInt(id, 10);
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if (isNaN(id)) {
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blueslip.fatal("Bad message id");
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}
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var closest_id = this.closest_id(id);
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// The name "use_closest" option is a bit legacy. We
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// are always gonna move to the closest visible id; the flag
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// just says whether we call blueslip.error or not. The caller
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// sets use_closest to true when it expects us to move the
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// pointer as needed, so only generate an error if the flag is
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// false.
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if (!opts.use_closest && closest_id !== id) {
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blueslip.error("Selected message id not in MessageList",
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{table_name: this.table_name, id: id});
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}
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if (closest_id === -1) {
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blueslip.fatal("Cannot select id -1", {table_name: this.table_name});
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}
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id = closest_id;
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opts.id = id;
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this._selected_id = id;
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if (!opts.from_rendering) {
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this.view.maybe_rerender();
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}
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$(document).trigger($.Event('message_selected.zulip', opts));
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},
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reselect_selected_id: function MessageList_select_closest_id() {
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this.select_id(this._selected_id, {from_rendering: true});
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},
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selected_message: function MessageList_selected_message() {
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return this.get(this._selected_id);
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},
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selected_row: function MessageList_selected_row() {
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return this.get_row(this._selected_id);
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},
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on_expandable_row: function MessageList_on_expandable_row() {
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return this.view.is_expandable_row(this.selected_row());
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},
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closest_id: function MessageList_closest_id(id) {
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var items = this._items;
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if (items.length === 0) {
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return -1;
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}
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var closest = util.lower_bound(items, id,
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function (a, b) {
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return a.id < b;
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});
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if (closest === items.length
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|| (closest !== 0
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// We have the index at which a message with the
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// given id would be inserted, but that isn't
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// necessarily the index of the message that has an
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// id that is closest to the query; it could be the
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// previous message in the list.
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&& (id - items[closest - 1].id <
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items[closest].id - id)))
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{
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closest = closest - 1;
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}
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return items[closest].id;
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},
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advance_past_messages: function MessageList_advance_past_messages(msg_ids) {
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// Start with the current pointer, but then keep advancing the
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// pointer while the next message's id is in msg_ids. See trac #1555
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// for more context, but basically we are skipping over contiguous
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// messages that we have recently visited.
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var next_msg_id = 0;
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var id_set = {};
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_.each(msg_ids, function (msg_id) {
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id_set[msg_id] = true;
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});
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var idx = this.selected_idx() + 1;
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while (idx < this._items.length) {
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var msg_id = this._items[idx].id;
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if (!id_set[msg_id]) {
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break;
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}
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next_msg_id = msg_id;
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++idx;
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}
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if (next_msg_id > 0) {
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this._selected_id = next_msg_id;
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}
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},
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_add_to_hash: function MessageList__add_to_hash(messages) {
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var self = this;
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messages.forEach(function (elem) {
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var id = parseInt(elem.id, 10);
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if (isNaN(id)) {
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blueslip.fatal("Bad message id");
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}
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if (self._hash[id] !== undefined) {
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blueslip.error("Duplicate message added to MessageList");
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return;
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}
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self._hash[id] = elem;
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});
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},
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is_summarized_message: function (message) {
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if (!feature_flags.summarize_read_while_narrowed ||
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message === undefined || message.flags === undefined) {
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return false;
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}
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if (message.id >= this.min_id_exempted_from_summaries) {
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return false;
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}
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if (this.summarize_read === 'home') {
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return message.flags.indexOf('summarize_in_home') !== -1;
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} else if (this.summarize_read === 'stream' ) {
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return message.flags.indexOf('summarize_in_stream') !== -1;
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} else {
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return false;
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}
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},
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summary_adjective: function (message) {
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if (_.contains(message.flags, 'force_collapse')) {
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return 'collapsed';
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} else if (!_.contains(message.flags, 'force_expand')) {
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if (this.is_summarized_message(message)) {
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return 'read';
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}
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}
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return null;
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},
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selected_idx: function MessageList_selected_idx() {
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return util.lower_bound(this._items, this._selected_id,
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function (a, b) { return a.id < b; });
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},
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// Maintains a trailing bookend element explaining any changes in
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// your subscribed/unsubscribed status at the bottom of the
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// message list.
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update_trailing_bookend: function MessageList_update_trailing_bookend() {
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this.view.clear_trailing_bookend();
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if (!this.narrowed) {
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return;
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}
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var stream = narrow.stream();
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if (stream === undefined) {
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return;
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}
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var trailing_bookend_content, subscribed = stream_data.is_subscribed(stream);
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if (subscribed) {
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if (this.last_message_historical) {
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trailing_bookend_content = "--- Subscribed to stream " + stream + " ---";
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}
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} else {
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if (!this.last_message_historical) {
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trailing_bookend_content = "--- Unsubscribed from stream " + stream + " ---";
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} else {
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trailing_bookend_content = "--- Not subscribed to stream " + stream + " ---";
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}
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}
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if (trailing_bookend_content !== undefined) {
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this.view.render_trailing_bookend(trailing_bookend_content);
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}
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},
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start_summary_exemption: function MessageList_start_summary_exemption() {
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var num_exempt = 8;
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this.min_id_exempted_from_summaries = this.nth_most_recent_id(num_exempt);
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},
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unmuted_messages: function MessageList_unmuted_messages(messages) {
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return _.reject(messages, function (message) {
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return muting.is_topic_muted(message.stream, message.subject);
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});
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},
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append: function MessageList_append(messages, messages_are_new) {
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var viewable_messages;
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if (this.muting_enabled) {
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this._all_items = this._all_items.concat(messages);
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viewable_messages = this.unmuted_messages(messages);
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} else {
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viewable_messages = messages;
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}
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this._items = this._items.concat(viewable_messages);
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if (this.num_appends === 0) {
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// We can't figure out which messages need to be exempt from
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// summarization until we get the first batch of messages.
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this.start_summary_exemption();
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}
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this.num_appends += 1;
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this._add_to_hash(messages);
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this.view.append(viewable_messages, messages_are_new);
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},
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prepend: function MessageList_prepend(messages) {
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var viewable_messages;
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if (this.muting_enabled) {
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this._all_items = messages.concat(this._all_items);
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viewable_messages = this.unmuted_messages(messages);
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} else {
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viewable_messages = messages;
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}
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this._items = viewable_messages.concat(this._items);
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this._add_to_hash(messages);
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this.view.prepend(viewable_messages);
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},
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add_and_rerender: function MessageList_add_and_rerender(messages) {
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// To add messages that might be in the interior of our
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// existing messages list, we just add the new messages and
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// then rerender the whole thing.
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var viewable_messages;
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if (this.muting_enabled) {
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this._all_items = messages.concat(this._all_items);
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this._all_items.sort(function (a, b) {return a.id - b.id;});
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viewable_messages = this.unmuted_messages(messages);
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this._items = viewable_messages.concat(this._items);
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} else {
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this._items = messages.concat(this._items);
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}
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this._items.sort(function (a, b) {return a.id - b.id;});
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this._add_to_hash(messages);
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this.view.rerender_the_whole_thing();
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},
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show_edit_message: function MessageList_show_edit_message(row, edit_obj) {
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row.find(".message_edit_form").empty().append(edit_obj.form);
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row.find(".message_content").hide();
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row.find(".message_edit").show();
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row.find(".message_edit_content").autosize();
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},
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hide_edit_message: function MessageList_hide_edit_message(row) {
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row.find(".message_content").show();
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row.find(".message_edit").hide();
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},
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show_edit_topic: function MessageList_show_edit_topic(recipient_row, form) {
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recipient_row.find(".topic_edit_form").empty().append(form);
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recipient_row.find(".stream_topic").hide();
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recipient_row.find(".topic_edit").show();
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},
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hide_edit_topic: function MessageList_hide_edit_topic(recipient_row) {
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recipient_row.find(".stream_topic").show();
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recipient_row.find(".topic_edit").hide();
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},
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show_message_as_read: function (message, options) {
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var row = this.get_row(message.id);
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if (options.from === 'pointer' && feature_flags.mark_read_at_bottom) {
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row.find('.unread_marker').addClass('fast_fade');
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} else {
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row.find('.unread_marker').addClass('slow_fade');
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}
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row.removeClass('unread');
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},
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rerender: function MessageList_rerender() {
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// We need to clear the rendering state, rather than just
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// doing clear_table, since we want to potentially recollapse
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// things.
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this._selected_id = this.closest_id(this._selected_id);
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this.view.clear_rendering_state(false);
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this.view.update_render_window(this.selected_idx(), false);
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this.view.rerender_preserving_scrolltop();
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if (this._selected_id !== -1) {
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this.select_id(this._selected_id);
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}
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},
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rerender_after_muting_changes: function MessageList_rerender_after_muting_changes() {
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if (!this.muting_enabled) {
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return;
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}
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this._items = this.unmuted_messages(this._all_items);
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this.rerender();
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},
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all: function MessageList_all() {
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return this._items;
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},
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get_row: function (id) {
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return this.view.get_row(id);
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},
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change_display_recipient: function MessageList_change_display_recipient(old_recipient,
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new_recipient) {
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// This method only works for streams.
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_.each(this._items, function (item) {
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if (item.display_recipient === old_recipient) {
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item.display_recipient = new_recipient;
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item.stream = new_recipient;
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}
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});
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this.view.rerender_the_whole_thing();
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}
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};
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// We stop autoscrolling when the user is clearly in the middle of
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// doing something. Be careful, though, if you try to capture
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// mousemove, then you will have to contend with the autoscroll
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// itself generating mousemove events.
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$(document).on('message_selected.zulip hashchange.zulip mousewheel', function (event) {
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viewport.stop_auto_scrolling();
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});
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}());
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/*jslint nomen: false */
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if (typeof module !== 'undefined') {
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module.exports = MessageList;
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}
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