1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*
* Copyright (C) 2023 Yomitan Authors
* Copyright (C) 2022 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/>.
*/
import {DocumentUtil} from '../dom/document-util.js';
import {TextSourceRange} from '../dom/text-source-range.js';
/**
* This class is a helper for handling Google Docs content in content scripts.
*/
export class GoogleDocsUtil {
/** @type {HTMLStyleElement|undefined} */
static _styleNode = void 0;
/**
* Scans the document for text or elements with text information at the given coordinate.
* Coordinates are provided in [client space](https://developer.mozilla.org/en-US/docs/Web/CSS/CSSOM_View/Coordinate_systems).
* @param {number} x The x coordinate to search at.
* @param {number} y The y coordinate to search at.
* @param {import('document-util').GetRangeFromPointOptions} options Options to configure how element detection is performed.
* @returns {?TextSourceRange} A range for the hovered text or element, or `null` if no applicable content was found.
*/
static getRangeFromPoint(x, y, {normalizeCssZoom}) {
const styleNode = this._getStyleNode();
styleNode.disabled = false;
const element = document.elementFromPoint(x, y);
styleNode.disabled = true;
if (element !== null && element.matches('.kix-canvas-tile-content svg>g>rect')) {
const ariaLabel = element.getAttribute('aria-label');
if (typeof ariaLabel === 'string' && ariaLabel.length > 0) {
return this._createRange(element, ariaLabel, x, y, normalizeCssZoom);
}
}
return null;
}
/**
* @returns {HTMLStyleElement}
*/
static _getStyleNode() {
// This <style> node is necessary to force the SVG <rect> elements to have a fill,
// which allows them to be included in document.elementsFromPoint's return value.
if (typeof this._styleNode === 'undefined') {
const style = document.createElement('style');
style.textContent = [
'.kix-canvas-tile-content{pointer-events:none!important;}',
'.kix-canvas-tile-content svg>g>rect{pointer-events:all!important;}'
].join('\n');
const parent = document.head || document.documentElement;
if (parent !== null) {
parent.appendChild(style);
}
this._styleNode = style;
}
return this._styleNode;
}
/**
* @param {Element} element
* @param {string} text
* @param {number} x
* @param {number} y
* @param {boolean} normalizeCssZoom
* @returns {TextSourceRange}
*/
static _createRange(element, text, x, y, normalizeCssZoom) {
// Create imposter
const content = document.createTextNode(text);
const svgText = document.createElementNS('http://www.w3.org/2000/svg', 'text');
const transform = element.getAttribute('transform') || '';
const font = element.getAttribute('data-font-css') || '';
const elementX = element.getAttribute('x');
const elementY = element.getAttribute('y');
if (typeof elementX === 'string') { svgText.setAttribute('x', elementX); }
if (typeof elementY === 'string') { svgText.setAttribute('y', elementY); }
svgText.appendChild(content);
const textStyle = svgText.style;
this._setImportantStyle(textStyle, 'all', 'initial');
this._setImportantStyle(textStyle, 'transform', transform);
this._setImportantStyle(textStyle, 'font', font);
this._setImportantStyle(textStyle, 'text-anchor', 'start');
const {parentNode} = element;
if (parentNode !== null) {
parentNode.appendChild(svgText);
}
// Adjust offset
const elementRect = element.getBoundingClientRect();
const textRect = svgText.getBoundingClientRect();
const yOffset = ((elementRect.top - textRect.top) + (elementRect.bottom - textRect.bottom)) * 0.5;
this._setImportantStyle(textStyle, 'transform', `translate(0px,${yOffset}px) ${transform}`);
// Create range
const range = this._getRangeWithPoint(content, x, y, normalizeCssZoom);
this._setImportantStyle(textStyle, 'pointer-events', 'none');
this._setImportantStyle(textStyle, 'opacity', '0');
return TextSourceRange.createFromImposter(range, svgText, element);
}
/**
* @param {Text} textNode
* @param {number} x
* @param {number} y
* @param {boolean} normalizeCssZoom
* @returns {Range}
*/
static _getRangeWithPoint(textNode, x, y, normalizeCssZoom) {
if (normalizeCssZoom) {
const scale = DocumentUtil.computeZoomScale(textNode);
x /= scale;
y /= scale;
}
const range = document.createRange();
let start = 0;
let end = /** @type {string} */ (textNode.nodeValue).length;
while (end - start > 1) {
const mid = Math.floor((start + end) / 2);
range.setStart(textNode, mid);
range.setEnd(textNode, end);
if (DocumentUtil.isPointInAnyRect(x, y, range.getClientRects())) {
start = mid;
} else {
end = mid;
}
}
range.setStart(textNode, start);
range.setEnd(textNode, start);
return range;
}
/**
* @param {CSSStyleDeclaration} style
* @param {string} propertyName
* @param {string} value
*/
static _setImportantStyle(style, propertyName, value) {
style.setProperty(propertyName, value, 'important');
}
}
|