WebUI/script.js

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JavaScript
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function gradioApp() {
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const elems = document.getElementsByTagName('gradio-app');
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const elem = elems.length == 0 ? document : elems[0];
if (elem !== document) {
elem.getElementById = function(id) {
return document.getElementById(id);
};
}
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return elem.shadowRoot ? elem.shadowRoot : elem;
}
/**
* Get the currently selected top-level UI tab button (e.g. the button that says "Extras").
*/
function get_uiCurrentTab() {
return gradioApp().querySelector('#tabs > .tab-nav > button.selected');
}
/**
* Get the first currently visible top-level UI tab content (e.g. the div hosting the "txt2img" UI).
*/
function get_uiCurrentTabContent() {
return gradioApp().querySelector('#tabs > .tabitem[id^=tab_]:not([style*="display: none"])');
}
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var uiUpdateCallbacks = [];
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var uiAfterUpdateCallbacks = [];
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var uiLoadedCallbacks = [];
var uiTabChangeCallbacks = [];
var optionsChangedCallbacks = [];
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var uiAfterUpdateTimeout = null;
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var uiCurrentTab = null;
/**
* Register callback to be called at each UI update.
* The callback receives an array of MutationRecords as an argument.
*/
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function onUiUpdate(callback) {
uiUpdateCallbacks.push(callback);
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}
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/**
* Register callback to be called soon after UI updates.
* The callback receives no arguments.
*
* This is preferred over `onUiUpdate` if you don't need
* access to the MutationRecords, as your function will
* not be called quite as often.
*/
function onAfterUiUpdate(callback) {
uiAfterUpdateCallbacks.push(callback);
}
/**
* Register callback to be called when the UI is loaded.
* The callback receives no arguments.
*/
function onUiLoaded(callback) {
uiLoadedCallbacks.push(callback);
}
/**
* Register callback to be called when the UI tab is changed.
* The callback receives no arguments.
*/
function onUiTabChange(callback) {
uiTabChangeCallbacks.push(callback);
}
/**
* Register callback to be called when the options are changed.
* The callback receives no arguments.
* @param callback
*/
function onOptionsChanged(callback) {
optionsChangedCallbacks.push(callback);
}
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function executeCallbacks(queue, arg) {
for (const callback of queue) {
try {
callback(arg);
} catch (e) {
console.error("error running callback", callback, ":", e);
}
}
}
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/**
* Schedule the execution of the callbacks registered with onAfterUiUpdate.
* The callbacks are executed after a short while, unless another call to this function
* is made before that time. IOW, the callbacks are executed only once, even
* when there are multiple mutations observed.
*/
function scheduleAfterUiUpdateCallbacks() {
clearTimeout(uiAfterUpdateTimeout);
uiAfterUpdateTimeout = setTimeout(function() {
executeCallbacks(uiAfterUpdateCallbacks);
}, 200);
}
var executedOnLoaded = false;
document.addEventListener("DOMContentLoaded", function() {
var mutationObserver = new MutationObserver(function(m) {
if (!executedOnLoaded && gradioApp().querySelector('#txt2img_prompt')) {
executedOnLoaded = true;
executeCallbacks(uiLoadedCallbacks);
}
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executeCallbacks(uiUpdateCallbacks, m);
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scheduleAfterUiUpdateCallbacks();
const newTab = get_uiCurrentTab();
if (newTab && (newTab !== uiCurrentTab)) {
uiCurrentTab = newTab;
executeCallbacks(uiTabChangeCallbacks);
}
});
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mutationObserver.observe(gradioApp(), {childList: true, subtree: true});
});
/**
* Add a ctrl+enter as a shortcut to start a generation
*/
document.addEventListener('keydown', function(e) {
var handled = false;
if (e.key !== undefined) {
if ((e.key == "Enter" && (e.metaKey || e.ctrlKey || e.altKey))) handled = true;
} else if (e.keyCode !== undefined) {
if ((e.keyCode == 13 && (e.metaKey || e.ctrlKey || e.altKey))) handled = true;
}
if (handled) {
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var button = get_uiCurrentTabContent().querySelector('button[id$=_generate]');
if (button) {
button.click();
}
e.preventDefault();
}
});
/**
* checks that a UI element is not in another hidden element or tab content
*/
function uiElementIsVisible(el) {
if (el === document) {
return true;
}
const computedStyle = getComputedStyle(el);
const isVisible = computedStyle.display !== 'none';
if (!isVisible) return false;
return uiElementIsVisible(el.parentNode);
}
function uiElementInSight(el) {
const clRect = el.getBoundingClientRect();
const windowHeight = window.innerHeight;
const isOnScreen = clRect.bottom > 0 && clRect.top < windowHeight;
return isOnScreen;
}