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/*
* Copyright (C) 2019-2020 Yomichan Authors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
class DOM {
static isPointInRect(x, y, rect) {
return (
x >= rect.left && x < rect.right &&
y >= rect.top && y < rect.bottom
);
}
static isPointInAnyRect(x, y, rects) {
for (const rect of rects) {
if (DOM.isPointInRect(x, y, rect)) {
return true;
}
}
return false;
}
static isPointInSelection(x, y, selection) {
for (let i = 0; i < selection.rangeCount; ++i) {
const range = selection.getRangeAt(i);
if (DOM.isPointInAnyRect(x, y, range.getClientRects())) {
return true;
}
}
return false;
}
static isMouseButtonPressed(mouseEvent, button) {
const mouseEventButton = mouseEvent.button;
switch (button) {
case 'primary': return mouseEventButton === 0;
case 'secondary': return mouseEventButton === 2;
case 'auxiliary': return mouseEventButton === 1;
default: return false;
}
}
static isMouseButtonDown(mouseEvent, button) {
const mouseEventButtons = mouseEvent.buttons;
switch (button) {
case 'primary': return (mouseEventButtons & 0x1) !== 0x0;
case 'secondary': return (mouseEventButtons & 0x2) !== 0x0;
case 'auxiliary': return (mouseEventButtons & 0x4) !== 0x0;
default: return false;
}
}
static getActiveModifiers(event) {
const modifiers = new Set();
if (event.altKey) { modifiers.add('alt'); }
if (event.ctrlKey) { modifiers.add('ctrl'); }
if (event.metaKey) { modifiers.add('meta'); }
if (event.shiftKey) { modifiers.add('shift'); }
return modifiers;
}
static getKeyFromEvent(event) {
const key = event.key;
return (typeof key === 'string' ? (key.length === 1 ? key.toUpperCase() : key) : '');
}
static addFullscreenChangeEventListener(onFullscreenChanged, eventListenerCollection=null) {
const target = document;
const options = false;
const fullscreenEventNames = [
'fullscreenchange',
'MSFullscreenChange',
'mozfullscreenchange',
'webkitfullscreenchange'
];
for (const eventName of fullscreenEventNames) {
if (eventListenerCollection === null) {
target.addEventListener(eventName, onFullscreenChanged, options);
} else {
eventListenerCollection.addEventListener(target, eventName, onFullscreenChanged, options);
}
}
}
static getFullscreenElement() {
return (
document.fullscreenElement ||
document.msFullscreenElement ||
document.mozFullScreenElement ||
document.webkitFullscreenElement ||
null
);
}
static getNodesInRange(range) {
const end = range.endContainer;
const nodes = [];
for (let node = range.startContainer; node !== null; node = DOM.getNextNode(node)) {
nodes.push(node);
if (node === end) { break; }
}
return nodes;
}
static getNextNode(node) {
let next = node.firstChild;
if (next === null) {
while (true) {
next = node.nextSibling;
if (next !== null) { break; }
next = node.parentNode;
if (next === null) { break; }
node = next;
}
}
return next;
}
static anyNodeMatchesSelector(nodes, selector) {
const ELEMENT_NODE = Node.ELEMENT_NODE;
for (let node of nodes) {
for (; node !== null; node = node.parentNode) {
if (node.nodeType !== ELEMENT_NODE) { continue; }
if (node.matches(selector)) { return true; }
break;
}
}
return false;
}
}
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