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Implement hotkey state as a state machine

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(imported from commit d4f52cbc6bc9e66643e89c5b49a2201e4c938265)
This commit is contained in:
Keegan McAllister 2012-09-07 18:51:59 -04:00
parent 2798f83dbe
commit afee8630aa
1 changed files with 37 additions and 36 deletions
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73
zephyr/static/js/zephyr.js
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@ -199,21 +199,6 @@ function select_zephyr(zephyr_id) {
}
}
var allow_hotkeys = true;
var goto_pressed = false;
// NB: This just binds to current elements, and won't bind to elements
// created after ready() is called.
$(function () {
$('input, textarea, button').focus(function () {
allow_hotkeys = false;
});
$('input, textarea, button').blur(function () {
allow_hotkeys = true;
});
});
function process_hotkey(code) {
var parent, zephyr_class, zephyr_huddle, zephyr_personal, zephyr_instance, next_zephyr;
switch (code) {
@ -227,7 +212,7 @@ function process_hotkey(code) {
if (next_zephyr.length !== 0) {
select_zephyr(get_id(next_zephyr));
}
return true;
return process_hotkey;
case 82: // 'r': respond to zephyr
parent = get_selected_zephyr_row();
@ -257,11 +242,10 @@ function process_hotkey(code) {
$("#new_personal_zephyr").focus();
$("#new_personal_zephyr").select();
}
return true;
return process_key_in_input;
case 71: // 'g': start of "go to" command
goto_pressed = true;
return true;
return process_goto_hotkey;
}
return false;
@ -274,44 +258,61 @@ function process_goto_hotkey(code) {
parent = get_selected_zephyr_row();
zephyr_class = parent.find("span.zephyr_class").text();
narrow_class(zephyr_class);
return true;
break;
case 73: // 'i': narrow by instance
parent = get_selected_zephyr_row();
zephyr_class = parent.find("span.zephyr_class").text();
zephyr_instance = parent.find("span.zephyr_instance").text();
narrow_instance(zephyr_class, zephyr_instance);
return true;
break;
case 80: // 'p': narrow to personals
narrow_all_personals();
return true;
break;
case 65: // 'a': un-narrow
unhide();
return true;
break;
}
/* Always return to the initial hotkey mode, even
with an unrecognized "go to" command. */
return process_hotkey;
}
function process_key_in_input(code) {
if (code === 27) {
// User hit Escape key
$('input, textarea, button').blur();
return process_hotkey;
}
return false;
}
/* The current handler function for keydown events.
It should return a new handler, or 'false' to
decline to handle the event. */
var keydown_handler = process_hotkey;
$(document).keydown(function (event) {
if (allow_hotkeys) {
if (process_hotkey(event.keyCode)) {
event.preventDefault();
} else if (goto_pressed) {
if (process_goto_hotkey(event.keyCode)) {
event.preventDefault();
}
}
} else if (event.keyCode === 27) { // Esc pressed
$('input, textarea, button').blur();
var result = keydown_handler(event.keyCode);
if (typeof result === 'function') {
keydown_handler = result;
event.preventDefault();
}
});
if (event.keyCode !== 71) { // not 'g'
goto_pressed = false;
}
// NB: This just binds to current elements, and won't bind to elements
// created after ready() is called.
$(function () {
$('input, textarea, button').focus(function () {
keydown_handler = process_key_in_input;
});
$('input, textarea, button').blur(function () {
keydown_handler = process_hotkey;
});
});
function home_view(element) {