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Add spinner.BAIL for cancelling spinner without launching callback.

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This commit is contained in:
voussoir 2020-09-04 11:24:08 -07:00
parent 0518765f33
commit 98fae96a8a
2 changed files with 27 additions and 7 deletions
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29
frontends/ycdl_flask/static/js/spinner.js
View file

@ -1,5 +1,17 @@
var spinner = {};
/*
In general, spinners are used for functions that launch a callback, and the
callback will close the spinner after it runs. But, if your initial function
decides not to launch the callback (insufficient parameters, failed clientside
checks, etc.), you can have it return spinner.BAIL and the spinners will close
immediately. Of course, you're always welcome to use
window[button.dataset.spinnerCloser](), but this return value means you don't
need to pull the button into a variable, as long as you weren't using the
return value anyway.
*/
spinner.BAIL = "spinner.BAIL";
spinner.Spinner =
function Spinner(element)
{
@ -32,10 +44,12 @@ function Spinner(element)
spinner.spinner_button_index = 0;
spinner.button_spinner_groups = {};
// When a group member is closing, it will call the closer on all other members
// in the group. Of course, this would recurse forever without some kind of
// flagging, so this dict will hold group_id:true if a close is in progress,
// and be empty otherwise.
/*
When a group member is closing, it will call the closer on all other members
in the group. Of course, this would recurse forever without some kind of
flagging, so this dict will hold group_id:true if a close is in progress,
and be empty otherwise.
*/
spinner.spinner_group_closing = {};
spinner.add_to_spinner_group =
@ -161,7 +175,12 @@ function init_button_with_spinner()
{
window[button.dataset.spinnerOpener]();
}
return wrapped_onclick();
const ret = wrapped_onclick();
if (ret === spinner.BAIL)
{
window[button.dataset.spinnerCloser]();
}
return ret;
}
spinner.spinner_button_index += 1;

5
frontends/ycdl_flask/templates/channels.html
View file

@ -76,10 +76,11 @@ common.bind_box_to_button(box, button);
function add_channel_form()
{
if (box.value !== "")
if (box.value === "")
{
api.channels.add_channel(box.value, add_channel_callback);
return spinner.BAIL;
}
api.channels.add_channel(box.value, add_channel_callback);
}
function add_channel_callback(response)
{