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https://github.com/zulip/zulip.git
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9cbdbc4893
But do keep the pointer on the screen as you scroll, and smoothly scroll all the way up to the top or all the way down to the bottom. (imported from commit 6acad2a16339ee5eeeebd62a853000c21e4b7152)
111 lines
3.2 KiB
JavaScript
111 lines
3.2 KiB
JavaScript
var directional_hotkeys = {
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40: get_next_visible, // down arrow
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74: get_next_visible, // 'j'
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38: get_prev_visible, // up arrow
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75: get_prev_visible, // 'k'
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36: get_first_visible, // Home
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35: get_last_visible // End
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};
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function simulate_keypress(keycode) {
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$(document).trigger($.Event('keydown', {keyCode: keycode}));
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}
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function process_hotkey(code) {
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var next_zephyr, window_to_scroll;
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if (code in directional_hotkeys) {
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next_zephyr = directional_hotkeys[code](selected_zephyr);
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if (next_zephyr.length !== 0) {
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select_zephyr(next_zephyr, true);
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}
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if ((next_zephyr.length === 0) && (code === 40)) {
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// At the last zephyr, scroll to the bottom so we have
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// lots of nice whitespace for new zephyrs coming in.
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//
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// FIXME: this doesn't work for End because get_last_visible()
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// always returns a zephyr.
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$("#main_div").scrollTop($("#main_div").prop("scrollHeight"));
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}
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return process_hotkey;
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}
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window_to_scroll = $(".active.scrolling_tab");
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if (window_to_scroll.length === 0) {
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window_to_scroll = $(".active").find(".scrolling-tab");
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}
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switch (code) {
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case 33: // Page Up
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window_to_scroll.scrollTop(window_to_scroll.scrollTop() - window_to_scroll.height());
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keep_pointer_in_view();
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return process_hotkey;
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case 34: // Page Down
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window_to_scroll.scrollTop(window_to_scroll.scrollTop() + window_to_scroll.height());
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keep_pointer_in_view();
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return process_hotkey;
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case 27: // Esc: hide compose pane
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hide_compose();
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return process_hotkey;
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case 67: // 'c': compose
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compose_button();
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return process_compose_hotkey;
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case 82: // 'r': respond to zephyr
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respond_to_zephyr();
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return process_key_in_input;
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case 71: // 'g': start of "go to" command
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return process_goto_hotkey;
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}
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return false;
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}
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var goto_hotkeys = {
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67: narrow_by_recipient, // 'c'
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73: narrow_instance, // 'i'
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80: narrow_all_personals, // 'p'
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65: show_all_messages, // 'a'
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27: hide_compose // Esc
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};
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function process_goto_hotkey(code) {
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if (code in goto_hotkeys)
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goto_hotkeys[code]();
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/* Always return to the initial hotkey mode, even
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with an unrecognized "go to" command. */
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return process_hotkey;
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}
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function process_key_in_input(code) {
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if (code === 27) {
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// User hit Escape key
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hide_compose();
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return process_hotkey;
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}
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return false;
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}
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function process_compose_hotkey(code) {
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if (code === 9) { // Tab: toggle between class and huddle compose tabs.
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toggle_compose();
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return process_compose_hotkey;
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} else {
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keydown_handler = process_key_in_input;
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simulate_keypress(code);
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}
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}
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/* The current handler function for keydown events.
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It should return a new handler, or 'false' to
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decline to handle the event. */
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var keydown_handler = process_hotkey;
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$(document).keydown(function (event) {
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var result = keydown_handler(event.keyCode);
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if (typeof result === 'function') {
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keydown_handler = result;
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event.preventDefault();
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}
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});
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