2a86d66092
* Add DOM functions to DocumentUtil * Use DocumentUtil instead of DOM * Remove DOM * Move document-util.js into mixed
507 lines
17 KiB
JavaScript
507 lines
17 KiB
JavaScript
/*
|
||
* Copyright (C) 2016-2020 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/>.
|
||
*/
|
||
|
||
/* global
|
||
* DOMTextScanner
|
||
* TextSourceElement
|
||
* TextSourceRange
|
||
*/
|
||
|
||
class DocumentUtil {
|
||
constructor() {
|
||
this._transparentColorPattern = /rgba\s*\([^)]*,\s*0(?:\.0+)?\s*\)/;
|
||
}
|
||
|
||
getRangeFromPoint(x, y, deepContentScan) {
|
||
const elements = this._getElementsFromPoint(x, y, deepContentScan);
|
||
let imposter = null;
|
||
let imposterContainer = null;
|
||
let imposterSourceElement = null;
|
||
if (elements.length > 0) {
|
||
const element = elements[0];
|
||
switch (element.nodeName.toUpperCase()) {
|
||
case 'IMG':
|
||
case 'BUTTON':
|
||
return new TextSourceElement(element);
|
||
case 'INPUT':
|
||
imposterSourceElement = element;
|
||
[imposter, imposterContainer] = this._createImposter(element, false);
|
||
break;
|
||
case 'TEXTAREA':
|
||
imposterSourceElement = element;
|
||
[imposter, imposterContainer] = this._createImposter(element, true);
|
||
break;
|
||
}
|
||
}
|
||
|
||
const range = this._caretRangeFromPointExt(x, y, deepContentScan ? elements : []);
|
||
if (range !== null) {
|
||
if (imposter !== null) {
|
||
this._setImposterStyle(imposterContainer.style, 'z-index', '-2147483646');
|
||
this._setImposterStyle(imposter.style, 'pointer-events', 'none');
|
||
}
|
||
return new TextSourceRange(range, '', imposterContainer, imposterSourceElement);
|
||
} else {
|
||
if (imposterContainer !== null) {
|
||
imposterContainer.parentNode.removeChild(imposterContainer);
|
||
}
|
||
return null;
|
||
}
|
||
}
|
||
|
||
extractSentence(source, extent, layoutAwareScan) {
|
||
const quotesFwd = {'「': '」', '『': '』', "'": "'", '"': '"'};
|
||
const quotesBwd = {'」': '「', '』': '『', "'": "'", '"': '"'};
|
||
const terminators = '…。．.？?！!';
|
||
|
||
const sourceLocal = source.clone();
|
||
const position = sourceLocal.setStartOffset(extent, layoutAwareScan);
|
||
sourceLocal.setEndOffset(extent * 2 - position, layoutAwareScan, true);
|
||
const content = sourceLocal.text();
|
||
|
||
let quoteStack = [];
|
||
|
||
let startPos = 0;
|
||
for (let i = position; i >= startPos; --i) {
|
||
const c = content[i];
|
||
|
||
if (c === '\n') {
|
||
startPos = i + 1;
|
||
break;
|
||
}
|
||
|
||
if (quoteStack.length === 0 && (terminators.includes(c) || c in quotesFwd)) {
|
||
startPos = i + 1;
|
||
break;
|
||
}
|
||
|
||
if (quoteStack.length > 0 && c === quoteStack[0]) {
|
||
quoteStack.pop();
|
||
} else if (c in quotesBwd) {
|
||
quoteStack.unshift(quotesBwd[c]);
|
||
}
|
||
}
|
||
|
||
quoteStack = [];
|
||
|
||
let endPos = content.length;
|
||
for (let i = position; i <= endPos; ++i) {
|
||
const c = content[i];
|
||
|
||
if (c === '\n') {
|
||
endPos = i + 1;
|
||
break;
|
||
}
|
||
|
||
if (quoteStack.length === 0) {
|
||
if (terminators.includes(c)) {
|
||
endPos = i + 1;
|
||
break;
|
||
} else if (c in quotesBwd) {
|
||
endPos = i;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (quoteStack.length > 0 && c === quoteStack[0]) {
|
||
quoteStack.pop();
|
||
} else if (c in quotesFwd) {
|
||
quoteStack.unshift(quotesFwd[c]);
|
||
}
|
||
}
|
||
|
||
const text = content.substring(startPos, endPos);
|
||
const padding = text.length - text.replace(/^\s+/, '').length;
|
||
|
||
return {
|
||
text: text.trim(),
|
||
offset: position - startPos - padding
|
||
};
|
||
}
|
||
|
||
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 (this.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 (this.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 = this.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;
|
||
}
|
||
|
||
// Private
|
||
|
||
_setImposterStyle(style, propertyName, value) {
|
||
style.setProperty(propertyName, value, 'important');
|
||
}
|
||
|
||
_createImposter(element, isTextarea) {
|
||
const body = document.body;
|
||
if (body === null) { return [null, null]; }
|
||
|
||
const elementStyle = window.getComputedStyle(element);
|
||
const elementRect = element.getBoundingClientRect();
|
||
const documentRect = document.documentElement.getBoundingClientRect();
|
||
let left = elementRect.left - documentRect.left;
|
||
let top = elementRect.top - documentRect.top;
|
||
|
||
// Container
|
||
const container = document.createElement('div');
|
||
const containerStyle = container.style;
|
||
this._setImposterStyle(containerStyle, 'all', 'initial');
|
||
this._setImposterStyle(containerStyle, 'position', 'absolute');
|
||
this._setImposterStyle(containerStyle, 'left', '0');
|
||
this._setImposterStyle(containerStyle, 'top', '0');
|
||
this._setImposterStyle(containerStyle, 'width', `${documentRect.width}px`);
|
||
this._setImposterStyle(containerStyle, 'height', `${documentRect.height}px`);
|
||
this._setImposterStyle(containerStyle, 'overflow', 'hidden');
|
||
this._setImposterStyle(containerStyle, 'opacity', '0');
|
||
this._setImposterStyle(containerStyle, 'pointer-events', 'none');
|
||
this._setImposterStyle(containerStyle, 'z-index', '2147483646');
|
||
|
||
// Imposter
|
||
const imposter = document.createElement('div');
|
||
const imposterStyle = imposter.style;
|
||
|
||
let value = element.value;
|
||
if (value.endsWith('\n')) { value += '\n'; }
|
||
imposter.textContent = value;
|
||
|
||
for (let i = 0, ii = elementStyle.length; i < ii; ++i) {
|
||
const property = elementStyle[i];
|
||
this._setImposterStyle(imposterStyle, property, elementStyle.getPropertyValue(property));
|
||
}
|
||
this._setImposterStyle(imposterStyle, 'position', 'absolute');
|
||
this._setImposterStyle(imposterStyle, 'top', `${top}px`);
|
||
this._setImposterStyle(imposterStyle, 'left', `${left}px`);
|
||
this._setImposterStyle(imposterStyle, 'margin', '0');
|
||
this._setImposterStyle(imposterStyle, 'pointer-events', 'auto');
|
||
|
||
if (isTextarea) {
|
||
if (elementStyle.overflow === 'visible') {
|
||
this._setImposterStyle(imposterStyle, 'overflow', 'auto');
|
||
}
|
||
} else {
|
||
this._setImposterStyle(imposterStyle, 'overflow', 'hidden');
|
||
this._setImposterStyle(imposterStyle, 'white-space', 'nowrap');
|
||
this._setImposterStyle(imposterStyle, 'line-height', elementStyle.height);
|
||
}
|
||
|
||
container.appendChild(imposter);
|
||
body.appendChild(container);
|
||
|
||
// Adjust size
|
||
const imposterRect = imposter.getBoundingClientRect();
|
||
if (imposterRect.width !== elementRect.width || imposterRect.height !== elementRect.height) {
|
||
const width = parseFloat(elementStyle.width) + (elementRect.width - imposterRect.width);
|
||
const height = parseFloat(elementStyle.height) + (elementRect.height - imposterRect.height);
|
||
this._setImposterStyle(imposterStyle, 'width', `${width}px`);
|
||
this._setImposterStyle(imposterStyle, 'height', `${height}px`);
|
||
}
|
||
if (imposterRect.x !== elementRect.x || imposterRect.y !== elementRect.y) {
|
||
left += (elementRect.left - imposterRect.left);
|
||
top += (elementRect.top - imposterRect.top);
|
||
this._setImposterStyle(imposterStyle, 'left', `${left}px`);
|
||
this._setImposterStyle(imposterStyle, 'top', `${top}px`);
|
||
}
|
||
|
||
imposter.scrollTop = element.scrollTop;
|
||
imposter.scrollLeft = element.scrollLeft;
|
||
|
||
return [imposter, container];
|
||
}
|
||
|
||
_getElementsFromPoint(x, y, all) {
|
||
if (all) {
|
||
// document.elementsFromPoint can return duplicates which must be removed.
|
||
const elements = document.elementsFromPoint(x, y);
|
||
return elements.filter((e, i) => elements.indexOf(e) === i);
|
||
}
|
||
|
||
const e = document.elementFromPoint(x, y);
|
||
return e !== null ? [e] : [];
|
||
}
|
||
|
||
_isPointInRange(x, y, range) {
|
||
// Require a text node to start
|
||
if (range.startContainer.nodeType !== Node.TEXT_NODE) {
|
||
return false;
|
||
}
|
||
|
||
// Scan forward
|
||
const nodePre = range.endContainer;
|
||
const offsetPre = range.endOffset;
|
||
try {
|
||
const {node, offset, content} = new DOMTextScanner(range.endContainer, range.endOffset, true, false).seek(1);
|
||
range.setEnd(node, offset);
|
||
|
||
if (!this._isWhitespace(content) && DocumentUtil.isPointInAnyRect(x, y, range.getClientRects())) {
|
||
return true;
|
||
}
|
||
} finally {
|
||
range.setEnd(nodePre, offsetPre);
|
||
}
|
||
|
||
// Scan backward
|
||
const {node, offset, content} = new DOMTextScanner(range.startContainer, range.startOffset, true, false).seek(-1);
|
||
range.setStart(node, offset);
|
||
|
||
if (!this._isWhitespace(content) && DocumentUtil.isPointInAnyRect(x, y, range.getClientRects())) {
|
||
// This purposefully leaves the starting offset as modified and sets the range length to 0.
|
||
range.setEnd(node, offset);
|
||
return true;
|
||
}
|
||
|
||
// No match
|
||
return false;
|
||
}
|
||
|
||
_isWhitespace(string) {
|
||
return string.trim().length === 0;
|
||
}
|
||
|
||
_caretRangeFromPoint(x, y) {
|
||
if (typeof document.caretRangeFromPoint === 'function') {
|
||
// Chrome, Edge
|
||
return document.caretRangeFromPoint(x, y);
|
||
}
|
||
|
||
if (typeof document.caretPositionFromPoint === 'function') {
|
||
// Firefox
|
||
return this._caretPositionFromPoint(x, y);
|
||
}
|
||
|
||
// No support
|
||
return null;
|
||
}
|
||
|
||
_caretPositionFromPoint(x, y) {
|
||
const position = document.caretPositionFromPoint(x, y);
|
||
if (position === null) {
|
||
return null;
|
||
}
|
||
const node = position.offsetNode;
|
||
if (node === null) {
|
||
return null;
|
||
}
|
||
|
||
const range = document.createRange();
|
||
const offset = (node.nodeType === Node.TEXT_NODE ? position.offset : 0);
|
||
try {
|
||
range.setStart(node, offset);
|
||
range.setEnd(node, offset);
|
||
} catch (e) {
|
||
// Firefox throws new DOMException("The operation is insecure.")
|
||
// when trying to select a node from within a ShadowRoot.
|
||
return null;
|
||
}
|
||
return range;
|
||
}
|
||
|
||
_caretRangeFromPointExt(x, y, elements) {
|
||
const modifications = [];
|
||
try {
|
||
let i = 0;
|
||
let startContinerPre = null;
|
||
while (true) {
|
||
const range = this._caretRangeFromPoint(x, y);
|
||
if (range === null) {
|
||
return null;
|
||
}
|
||
|
||
const startContainer = range.startContainer;
|
||
if (startContinerPre !== startContainer) {
|
||
if (this._isPointInRange(x, y, range)) {
|
||
return range;
|
||
}
|
||
startContinerPre = startContainer;
|
||
}
|
||
|
||
i = this._disableTransparentElement(elements, i, modifications);
|
||
if (i < 0) {
|
||
return null;
|
||
}
|
||
}
|
||
} finally {
|
||
if (modifications.length > 0) {
|
||
this._restoreElementStyleModifications(modifications);
|
||
}
|
||
}
|
||
}
|
||
|
||
_disableTransparentElement(elements, i, modifications) {
|
||
while (true) {
|
||
if (i >= elements.length) {
|
||
return -1;
|
||
}
|
||
|
||
const element = elements[i++];
|
||
if (this._isElementTransparent(element)) {
|
||
const style = element.hasAttribute('style') ? element.getAttribute('style') : null;
|
||
modifications.push({element, style});
|
||
element.style.setProperty('pointer-events', 'none', 'important');
|
||
return i;
|
||
}
|
||
}
|
||
}
|
||
|
||
_restoreElementStyleModifications(modifications) {
|
||
for (const {element, style} of modifications) {
|
||
if (style === null) {
|
||
element.removeAttribute('style');
|
||
} else {
|
||
element.setAttribute('style', style);
|
||
}
|
||
}
|
||
}
|
||
|
||
_isElementTransparent(element) {
|
||
if (
|
||
element === document.body ||
|
||
element === document.documentElement
|
||
) {
|
||
return false;
|
||
}
|
||
const style = window.getComputedStyle(element);
|
||
return (
|
||
parseFloat(style.opacity) <= 0 ||
|
||
style.visibility === 'hidden' ||
|
||
(style.backgroundImage === 'none' && this._isColorTransparent(style.backgroundColor))
|
||
);
|
||
}
|
||
|
||
_isColorTransparent(cssColor) {
|
||
return this._transparentColorPattern.test(cssColor);
|
||
}
|
||
}
|