Files
zulip/web/src/resize.ts

223 lines
8.4 KiB
TypeScript

import autosize from "autosize";
import $ from "jquery";
import assert from "minimalistic-assert";
import * as blueslip from "./blueslip.ts";
import * as compose_state from "./compose_state.ts";
import * as compose_ui from "./compose_ui.ts";
import {media_breakpoints_num} from "./css_variables.ts";
import * as message_viewport from "./message_viewport.ts";
function get_bottom_whitespace_height(): number {
return message_viewport.height() * 0.4;
}
function get_new_heights(): {
stream_filters_max_height: number;
buddy_list_wrapper_max_height: number;
} {
const viewport_height = message_viewport.height();
// Add some gap for bottom element to be properly visible.
const GAP = 15;
let stream_filters_max_height =
viewport_height -
Number.parseInt($("#left-sidebar").css("paddingTop"), 10) -
($("#left-sidebar-navigation-area").outerHeight(true) ?? 0) -
($("#direct-messages-section-header").outerHeight(true) ?? 0) -
GAP;
// Don't let us crush the stream sidebar completely out of view
stream_filters_max_height = Math.max(80, stream_filters_max_height);
// RIGHT SIDEBAR
const usable_height =
viewport_height -
Number.parseInt($("#right-sidebar").css("paddingTop"), 10) -
($("#userlist-header").outerHeight(true) ?? 0);
const buddy_list_wrapper_max_height = Math.max(80, usable_height);
return {
stream_filters_max_height,
buddy_list_wrapper_max_height,
};
}
export function watch_manual_resize(element: string): (() => void)[] | undefined {
const box = document.querySelector(element);
if (!box) {
blueslip.error("Bad selector in watch_manual_resize", {element});
return undefined;
}
return watch_manual_resize_for_element(box);
}
export function watch_manual_resize_for_element(box: Element): (() => void)[] {
let height: number;
let mousedown = false;
const box_handler = function (): void {
mousedown = true;
height = box.clientHeight;
};
box.addEventListener("mousedown", box_handler);
// If the user resizes the textarea manually, we use the
// callback to stop autosize from adjusting the height.
// It will be re-enabled when this component is next opened.
const body_handler = function (): void {
if (mousedown) {
mousedown = false;
if (height !== box.clientHeight) {
height = box.clientHeight;
autosize.destroy($(box)).height(height + "px");
}
}
};
document.body.addEventListener("mouseup", body_handler);
return [box_handler, body_handler];
}
export function reset_compose_message_max_height(bottom_whitespace_height?: number): void {
// If the compose-box is open, we set the `max-height` property of
// `compose-textarea` and `preview-textarea`, so that the
// compose-box's maximum extent does not overlap the last message
// in the current stream. We also leave a tiny bit of space after
// the last message of the current stream.
// Compute bottom_whitespace_height if not provided by caller.
if (typeof bottom_whitespace_height !== "number") {
bottom_whitespace_height = get_bottom_whitespace_height();
}
const compose_height = $("#compose").get(0)!.getBoundingClientRect().height;
const compose_textarea_height = Math.max(
$("textarea#compose-textarea").get(0)!.getBoundingClientRect().height,
$("#preview_message_area").get(0)!.getBoundingClientRect().height,
);
const compose_non_textarea_height = compose_height - compose_textarea_height;
// We ensure that the last message is not overlapped by compose box.
$("textarea#compose-textarea").css(
"max-height",
bottom_whitespace_height - compose_non_textarea_height,
);
$("#preview_message_area").css(
"max-height",
bottom_whitespace_height - compose_non_textarea_height,
);
$("#scroll-to-bottom-button-container").css("bottom", compose_height);
compose_ui.autosize_textarea($("#compose-textarea"));
}
export function resize_bottom_whitespace(): void {
const bottom_whitespace_height = get_bottom_whitespace_height();
$("html").css("--max-unmaximized-compose-height", `${bottom_whitespace_height}px`);
// The height of the compose box is tied to that of
// bottom_whitespace, so update it if necessary.
//
// reset_compose_message_max_height cannot compute the right
// height correctly while compose is hidden. This is OK, because
// we also resize compose every time it is opened.
if (compose_state.composing()) {
reset_compose_message_max_height(bottom_whitespace_height);
}
}
export function resize_stream_subscribers_list(): void {
// Calculates the height of the subscribers list in stream settings.
// This avoids the stream settings from overflowing the container and
// having a scroll bar.
if ($("#stream_settings").length === 0) {
// Don't run if stream settings (like $subscriptions_info below) is not open.
return;
}
const $subscriptions_info = $("#subscription_overlay .two-pane-settings-container .right");
const classes_above_subscribers_list = [
".display-type", // = stream_settings_title
".subscriber_list_settings_container .stream_settings_header",
".subscription_settings .stream_setting_subsection_title",
".subscription_settings .subscriber_list_settings",
".subscription_settings .stream_setting_subsection_title",
];
const $classes_above_subscribers_list = $subscriptions_info.find(
classes_above_subscribers_list.join(", "),
);
let total_height_of_classes_above_subscribers_list = 0;
$classes_above_subscribers_list.each(function () {
const outer_height = $(this).outerHeight(true);
assert(outer_height !== undefined);
total_height_of_classes_above_subscribers_list += outer_height;
});
const subscribers_list_header_height = 30;
const margin_between_tab_switcher_and_add_subscribers_title = 20;
const subscriptions_info_height = $subscriptions_info.height();
assert(subscriptions_info_height !== undefined);
const subscribers_list_height =
subscriptions_info_height -
total_height_of_classes_above_subscribers_list -
subscribers_list_header_height -
margin_between_tab_switcher_and_add_subscribers_title;
$("html").css("--stream-subscriber-list-max-height", `${subscribers_list_height}px`);
}
export function resize_stream_filters_container(): void {
const h = get_new_heights();
resize_bottom_whitespace();
$("#left_sidebar_scroll_container").css("max-height", h.stream_filters_max_height);
}
export function resize_sidebars(): void {
const h = get_new_heights();
$("#buddy_list_wrapper").css("max-height", h.buddy_list_wrapper_max_height);
$("#left_sidebar_scroll_container").css("max-height", h.stream_filters_max_height);
}
export function update_recent_view(): void {
const $recent_view_filter_container = $("#recent_view_filter_buttons");
const recent_view_filters_height = $recent_view_filter_container.outerHeight(true) ?? 0;
$("html").css("--recent-topics-filters-height", `${recent_view_filters_height}px`);
// Update max avatars to prevent participant avatars from overflowing.
// These numbers are just based on speculation.
const recent_view_filters_width = $recent_view_filter_container.outerWidth(true) ?? 0;
if (!recent_view_filters_width) {
return;
}
const num_avatars_narrow_window = 2;
const num_avatars_max = 4;
if (recent_view_filters_width < media_breakpoints_num.md) {
$("html").css("--recent-view-max-avatars", num_avatars_narrow_window);
} else {
$("html").css("--recent-view-max-avatars", num_avatars_max);
}
}
function resize_navbar_alerts(): void {
const navbar_alerts_height = $("#navbar_alerts_wrapper").height();
document.documentElement.style.setProperty(
"--navbar-alerts-wrapper-height",
navbar_alerts_height + "px",
);
// If the compose-box is in full sized state,
// reset its height as well.
if (compose_ui.is_full_size()) {
compose_ui.set_compose_box_top(true);
}
}
export function resize_page_components(): void {
resize_navbar_alerts();
resize_sidebars();
resize_bottom_whitespace();
resize_stream_subscribers_list();
}