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pointer: Remove frontend logic tracking furthest_read.

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Since we are no longer using the "pointer" value sent in
page_params.pointer for anything, there's no value in continuing to
send it from the server to the client.

The remaining code in pointer.js is logic managing state for the
currently selected message.
This commit is contained in:
Tim Abbott
2020-06-17 23:17:39 -07:00
committed by Tim Abbott
parent 8516dde8f4
commit 94e6cb9abd
4 changed files with 0 additions and 92 deletions
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58
static/js/pointer.js
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@@ -12,70 +12,12 @@ exports.suppress_scroll_pointer_update = false;
exports.set_suppress_scroll_pointer_update = function (value) {
exports.suppress_scroll_pointer_update = value;
};
exports.furthest_read = -1;
exports.set_furthest_read = function (value) {
exports.furthest_read = value;
};
exports.server_furthest_read = -1;
exports.set_server_furthest_read = function (value) {
exports.server_furthest_read = value;
};
let pointer_update_in_flight = false;
function update_pointer() {
if (!pointer_update_in_flight) {
pointer_update_in_flight = true;
return channel.post({
url: '/json/users/me/pointer',
idempotent: true,
data: {pointer: exports.furthest_read},
success: function () {
exports.server_furthest_read = exports.furthest_read;
pointer_update_in_flight = false;
},
error: function () {
pointer_update_in_flight = false;
},
});
}
// Return an empty, resolved Deferred.
return $.when();
}
exports.send_pointer_update = function () {
// Only bother if you've read new messages.
if (exports.furthest_read > exports.server_furthest_read) {
update_pointer();
}
};
exports.initialize = function initialize() {
exports.server_furthest_read = page_params.pointer;
exports.furthest_read = exports.server_furthest_read;
// We only send pointer updates when the user has been idle for a
// short while to avoid hammering the server
$(document).idle({idle: 1000,
onIdle: exports.send_pointer_update,
keepTracking: true});
$(document).on('message_selected.zulip', function (event) {
// Only advance the pointer when not narrowed
if (event.id === -1) {
return;
}
// Additionally, don't advance the pointer server-side
// if the selected message is local-only
if (event.msg_list === home_msg_list && page_params.narrow_stream === undefined) {
if (event.id > exports.furthest_read) {
const msg = home_msg_list.get(event.id);
if (!msg.locally_echoed) {
exports.furthest_read = event.id;
}
}
}
if (event.mark_read && event.previously_selected !== -1) {
// Mark messages between old pointer and new pointer as read