mirror of https://github.com/zulip/zulip.git
467 lines
15 KiB
JavaScript
467 lines
15 KiB
JavaScript
import autosize from "autosize";
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import $ from "jquery";
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import * as blueslip from "./blueslip";
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import {MessageListData} from "./message_list_data";
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import {MessageListView} from "./message_list_view";
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import * as narrow_banner from "./narrow_banner";
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import * as narrow_state from "./narrow_state";
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import {page_params} from "./page_params";
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import * as stream_data from "./stream_data";
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export class MessageList {
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// A MessageList is the main interface for a message feed that is
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// rendered in the DOM. Code outside the message feed rendering
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// internals will directly call this module in order to manipulate
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// a message feed.
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//
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// Each MessageList has an associated MessageListData, which
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// manages the messages, and a MessageListView, which manages the
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// the templates/HTML rendering as well as invisible pagination.
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//
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// TODO: The abstraction boundary between this and MessageListView
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// is not particularly well-defined; it could be nice to figure
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// out a good rule.
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constructor(opts) {
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// The MessageListData keeps track of the actual sequence of
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// messages displayed by this MessageList. Most
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// configuration/logic questions in this module will be
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// answered by calling a function from the MessageListData,
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// its Filter, or its FetchStatus object.
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if (opts.data) {
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this.data = opts.data;
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} else {
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const filter = opts.filter;
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this.data = new MessageListData({
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excludes_muted_topics: opts.excludes_muted_topics,
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filter,
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});
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}
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// The table_name is the outer HTML element for this message
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// list in the DOM.
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const table_name = opts.table_name;
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this.table_name = table_name;
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// TODO: This property should likely just be inlined into
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// having the MessageListView code that needs to access it
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// query .data.filter directly.
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const collapse_messages = this.data.filter.supports_collapsing_recipients();
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// The MessageListView object that is responsible for
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// maintaining this message feed's HTML representation in the
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// DOM.
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this.view = new MessageListView(this, table_name, collapse_messages);
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// Whether this is a narrowed message list. The only message
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// list that is not is the home_msg_list global.
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//
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// TODO: It would probably be more readable to replace this
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// with another property with an inverted meaning, since
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// home_msg_list is the message list that is special/unique.
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this.narrowed = this.table_name === "zfilt";
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// TODO: This appears to be unused and can be deleted.
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this.num_appends = 0;
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// Keeps track of whether the user has done a UI interaction,
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// such as "Mark as unread", that should disable marking
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// messages as read until prevent_reading is called again.
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//
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// Distinct from filter.can_mark_messages_read(), which is a
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// property of the type of narrow, regardless of actions by
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// the user. Possibly this can be unified in some nice way.
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this.reading_prevented = false;
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return this;
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}
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prevent_reading() {
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this.reading_prevented = true;
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}
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resume_reading() {
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this.reading_prevented = false;
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}
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add_messages(messages, opts) {
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// This adds all messages to our data, but only returns
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// the currently viewable ones.
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const info = this.data.add_messages(messages);
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const top_messages = info.top_messages;
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const bottom_messages = info.bottom_messages;
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const interior_messages = info.interior_messages;
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// Currently we only need data back from rendering to
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// tell us whether users needs to scroll, which only
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// applies for `append_to_view`, but this may change over
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// time.
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let render_info;
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if (interior_messages.length > 0) {
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this.view.rerender_preserving_scrolltop(true);
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return true;
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}
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if (top_messages.length > 0) {
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this.view.prepend(top_messages);
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}
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if (bottom_messages.length > 0) {
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render_info = this.append_to_view(bottom_messages, opts);
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}
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if (this.narrowed && !this.empty()) {
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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_banner.hide_empty_narrow_message();
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}
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if (this.narrowed && !this.empty() && this.selected_id() === -1) {
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// And also select the newly arrived message.
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this.select_id(this.selected_id(), {then_scroll: true, use_closest: true});
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}
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return render_info;
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}
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get(id) {
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return this.data.get(id);
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}
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num_items() {
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return this.data.num_items();
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}
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empty() {
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return this.data.empty();
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}
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first() {
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return this.data.first();
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}
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last() {
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return this.data.last();
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}
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ids_greater_or_equal_than(id) {
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return this.data.ids_greater_or_equal_than(id);
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}
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prev() {
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return this.data.prev();
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}
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next() {
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return this.data.next();
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}
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is_at_end() {
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return this.data.is_at_end();
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}
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nth_most_recent_id(n) {
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return this.data.nth_most_recent_id(n);
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}
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is_search() {
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return this.data.is_search();
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}
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can_mark_messages_read() {
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/* Automatically marking messages as read can be disabled for
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two different reasons:
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* The view is structurally a search view, encoded in the
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properties of the message_list_data object.
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* The user recently marked messages in the view as unread, and
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we don't want to lose that state.
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*/
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return this.data.can_mark_messages_read() && !this.reading_prevented;
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}
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clear({clear_selected_id = true} = {}) {
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this.data.clear();
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this.view.clear_rendering_state(true);
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if (clear_selected_id) {
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this.data.clear_selected_id();
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}
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}
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selected_id() {
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return this.data.selected_id();
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}
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select_id(id, opts) {
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opts = {
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then_scroll: false,
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target_scroll_offset: undefined,
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use_closest: false,
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empty_ok: false,
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mark_read: true,
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force_rerender: false,
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...opts,
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id,
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msg_list: this,
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previously_selected_id: this.data.selected_id(),
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};
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const convert_id = (str_id) => {
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const id = Number.parseFloat(str_id);
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if (Number.isNaN(id)) {
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throw new TypeError("Bad message id " + str_id);
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}
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return id;
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};
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id = convert_id(id);
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const closest_id = this.closest_id(id);
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let error_data;
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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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error_data = {
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table_name: this.table_name,
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id,
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closest_id,
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};
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blueslip.error("Selected message id not in MessageList", error_data);
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}
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if (closest_id === -1 && !opts.empty_ok) {
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error_data = {
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table_name: this.table_name,
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id,
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items_length: this.data.num_items(),
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};
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blueslip.error("Cannot select id -1", error_data);
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throw new Error("Cannot select id -1");
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}
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id = closest_id;
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opts.id = id;
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this.data.set_selected_id(id);
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if (opts.force_rerender) {
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this.rerender();
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} else if (!opts.from_rendering) {
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this.view.maybe_rerender();
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}
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$(document).trigger(new $.Event("message_selected.zulip", opts));
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}
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selected_message() {
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return this.get(this.data.selected_id());
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}
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selected_row() {
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return this.get_row(this.data.selected_id());
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}
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closest_id(id) {
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return this.data.closest_id(id);
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}
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advance_past_messages(msg_ids) {
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return this.data.advance_past_messages(msg_ids);
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}
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selected_idx() {
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return this.data.selected_idx();
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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() {
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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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const stream_name = narrow_state.stream();
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if (stream_name === undefined) {
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return;
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}
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let deactivated = false;
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let just_unsubscribed = false;
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const subscribed = stream_data.is_subscribed_by_name(stream_name);
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const sub = stream_data.get_sub(stream_name);
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const can_toggle_subscription =
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sub !== undefined && stream_data.can_toggle_subscription(sub);
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if (sub === undefined) {
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deactivated = true;
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} else if (!subscribed && !this.last_message_historical) {
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just_unsubscribed = true;
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}
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this.view.render_trailing_bookend(
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stream_name,
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subscribed,
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deactivated,
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just_unsubscribed,
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can_toggle_subscription,
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page_params.is_spectator,
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);
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}
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unmuted_messages(messages) {
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return this.data.unmuted_messages(messages);
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}
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append(messages, opts) {
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const viewable_messages = this.data.append(messages);
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this.append_to_view(viewable_messages, opts);
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}
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append_to_view(messages, {messages_are_new = false} = {}) {
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this.num_appends += 1;
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const render_info = this.view.append(messages, messages_are_new);
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return render_info;
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}
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remove_and_rerender(message_ids) {
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this.data.remove(message_ids);
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this.rerender();
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}
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show_edit_message($row, edit_obj) {
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if ($row.find(".message_edit_form form").length !== 0) {
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return;
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}
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$row.find(".message_edit_form").append(edit_obj.$form);
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$row.find(".message_content, .status-message, .message_controls").hide();
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$row.find(".sender-status").toggleClass("sender-status-edit");
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$row.find(".messagebox-content").addClass("content_edit_mode");
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$row.find(".message_edit").css("display", "block");
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autosize($row.find(".message_edit_content"));
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}
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hide_edit_message($row) {
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$row.find(".message_content, .status-message, .message_controls").show();
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$row.find(".sender-status").toggleClass("sender-status-edit");
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$row.find(".message_edit_form").empty();
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$row.find(".messagebox-content").removeClass("content_edit_mode");
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$row.find(".message_edit").hide();
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$row.trigger("mouseleave");
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}
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show_edit_topic_on_recipient_row($recipient_row, $form) {
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$recipient_row.find(".topic_edit_form").append($form);
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$recipient_row.find(".on_hover_topic_edit").hide();
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$recipient_row.find(".edit_message_button").hide();
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$recipient_row.find(".stream_topic").hide();
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$recipient_row.find(".topic_edit").show();
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$recipient_row.find(".always_visible_topic_edit").hide();
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}
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hide_edit_topic_on_recipient_row($recipient_row) {
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$recipient_row.find(".stream_topic").show();
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$recipient_row.find(".on_hover_topic_edit").show();
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$recipient_row.find(".edit_message_button").show();
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$recipient_row.find(".topic_edit_form").empty();
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$recipient_row.find(".topic_edit").hide();
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$recipient_row.find(".always_visible_topic_edit").show();
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}
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show_message_as_read(message, options) {
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const $row = this.get_row(message.id);
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if (options.from === "pointer" || options.from === "server") {
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$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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reselect_selected_id() {
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const selected_id = this.data.selected_id();
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if (selected_id !== -1) {
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this.select_id(this.data.selected_id(), {from_rendering: true, mark_read: false});
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}
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}
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rerender_view() {
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this.view.rerender_preserving_scrolltop();
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this.reselect_selected_id();
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}
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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.data.reset_select_to_closest();
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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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if (this.narrowed) {
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if (this.empty()) {
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narrow_banner.show_empty_narrow_message();
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} else {
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narrow_banner.hide_empty_narrow_message();
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}
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}
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this.rerender_view();
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}
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update_muting_and_rerender() {
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this.data.update_items_for_muting();
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// We need to rerender whether or not the narrow hides muted
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// topics, because we need to update recipient bars for topics
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// we've muted when we are displaying those topics.
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//
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// We could avoid a rerender if we can provide that this
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// narrow cannot have contained messages to muted topics
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// either before or after the state change. The right place
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// to do this is in the message_events.js code path for
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// processing topic edits, since that's the only place we'll
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// call this frequently anyway.
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//
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// But in any case, we need to rerender the list for user muting,
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// to make sure only the right messages are hidden.
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this.rerender();
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}
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all_messages() {
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return this.data.all_messages();
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}
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first_unread_message_id() {
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return this.data.first_unread_message_id();
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}
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has_unread_messages() {
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return this.data.has_unread_messages();
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}
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message_range(start, end) {
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return this.data.message_range(start, end);
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}
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get_row(id) {
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return this.view.get_row(id);
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}
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change_message_id(old_id, new_id) {
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const require_rerender = this.data.change_message_id(old_id, new_id);
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if (require_rerender) {
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this.rerender_view();
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}
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}
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get_last_message_sent_by_me() {
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return this.data.get_last_message_sent_by_me();
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}
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}
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