mirror of https://github.com/zulip/zulip.git
115 lines
3.9 KiB
JavaScript
115 lines
3.9 KiB
JavaScript
var floating_recipient_bar = (function () {
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var exports = {};
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var is_floating_recipient_bar_showing = false;
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function show_floating_recipient_bar() {
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if (!is_floating_recipient_bar_showing) {
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$("#floating_recipient_bar").css('visibility', 'visible');
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is_floating_recipient_bar_showing = true;
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}
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}
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var old_label;
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function replace_floating_recipient_bar(desired_label) {
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var new_label;
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var other_label;
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var header;
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if (desired_label !== old_label) {
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if (desired_label.children(".message_header_stream").length !== 0) {
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new_label = $("#current_label_stream");
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other_label = $("#current_label_private_message");
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header = desired_label.children(".message_header_stream");
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} else {
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new_label = $("#current_label_private_message");
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other_label = $("#current_label_stream");
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header = desired_label.children(".message_header_private_message");
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}
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new_label.find(".message_header").replaceWith(header.clone());
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other_label.css('display', 'none');
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new_label.css('display', 'block');
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new_label.attr("zid", rows.id(rows.first_message_in_group(desired_label)));
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new_label.toggleClass('message-fade', desired_label.hasClass('message-fade'));
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old_label = desired_label;
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}
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show_floating_recipient_bar();
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}
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exports.hide = function () {
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if (is_floating_recipient_bar_showing) {
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$("#floating_recipient_bar").css('visibility', 'hidden');
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is_floating_recipient_bar_showing = false;
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}
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};
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exports.update = function () {
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// .temp-show-date might be forcing the display of a recipient_row_date if
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// the floating_recipient_bar is just beginning to overlap the
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// top-most recipient_bar. remove all instances of .temp-show-date and
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// re-apply it if we continue to detect overlap
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$('.temp-show-date').removeClass('temp-show-date');
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var floating_recipient_bar = $("#floating_recipient_bar");
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var floating_recipient_bar_top = floating_recipient_bar.offset().top;
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var floating_recipient_bar_bottom =
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floating_recipient_bar_top + floating_recipient_bar.safeOuterHeight();
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// Find the last message where the top of the recipient
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// row is at least partially occluded by our box.
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// Start with the pointer's current location.
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var selected_row = current_msg_list.selected_row();
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if (selected_row === undefined || selected_row.length === 0) {
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return;
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}
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var candidate = rows.get_message_recipient_row(selected_row);
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if (candidate === undefined) {
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return;
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}
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while (true) {
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if (candidate.length === 0) {
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// We're at the top of the page and no labels are above us.
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exports.hide();
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return;
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}
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if (candidate.is(".recipient_row")) {
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if (candidate.offset().top < floating_recipient_bar_bottom) {
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break;
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}
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}
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candidate = candidate.prev();
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}
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var current_label = candidate;
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// We now know what the floating stream/topic bar should say.
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// Do we show it?
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// Hide if the bottom of our floating stream/topic label is not
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// lower than the bottom of current_label (since that means we're
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// covering up a label that already exists).
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var header_height = $(current_label).find('.message_header').safeOuterHeight();
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if (floating_recipient_bar_bottom <=
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current_label.offset().top + header_height) {
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// hide floating_recipient_bar and use .temp-show-date to force display
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// of the recipient_row_date belonging to the current recipient_bar
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$('.recipient_row_date', current_label).addClass('temp-show-date');
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exports.hide();
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return;
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}
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replace_floating_recipient_bar(current_label);
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};
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return exports;
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}());
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if (typeof module !== 'undefined') {
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module.exports = floating_recipient_bar;
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}
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window.floating_recipient_bar = floating_recipient_bar;
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