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| 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 | 1x 1x 1x 16x 186x 186x 186x 186x 186x 186x 58x 58x 8x 8x 186x 8x 8x 8x 28x 186x 186x 8x 8x 8x 8x 8x 8x 8x 8x 8x 8x | import { ToolModes, AnnotationStyleStates } from '../enums';
import MouseCursor from './MouseCursor';
import ImageMouseCursor from './ImageMouseCursor';
import { getDefinedSVGCursorDescriptor } from './SVGCursorDescriptor';
import { getStyleProperty } from '../stateManagement/annotation/config/helpers';
import type { StyleSpecifier } from '../types/AnnotationStyle';
import type { SVGCursorDescriptor } from '../types';
const PROPERTY = 'color';
const STATE = AnnotationStyleStates.Highlighted;
const MODE = ToolModes.Active;
export default class SVGMouseCursor extends ImageMouseCursor {
constructor(
url: string,
x?: number,
y?: number,
name?: string | undefined,
fallback?: MouseCursor | undefined
) {
super(url, x, y, name, fallback);
}
/**
* Get a shared instance of the SVGMouseCursor class satisfying the given parameters.
*
* @param name - The name of the cursor (defined in SVGCursorDescriptor.ts);
* @param pointer - Should be true to use the version of the cursor containing
* a mouse pointer. Defaults to false (which does not add a pointer to the cursor);
* @param color - The color of the cursor. Defaults to tool.style.colorHighlightedActive;
* @returns a SVGMouseCursor instance or
* undefined if no SVG cursor descriptor was found with the given name;
*/
static getDefinedCursor(
name: string,
pointer = false,
color?: string
): MouseCursor {
Eif (!color) {
color = getStyleProperty(PROPERTY, {} as StyleSpecifier, STATE, MODE);
}
const urn = getCursorURN(name, pointer, color);
let cursor = super.getDefinedCursor(urn);
if (!cursor) {
const descriptor = getDefinedSVGCursorDescriptor(name);
if (descriptor) {
cursor = createSVGMouseCursor(
descriptor,
urn,
pointer,
color,
super.getDefinedCursor('default')
);
super.setDefinedCursor(urn, cursor);
}
}
return cursor;
}
}
/*
* Helpers
*/
function format(template: string, dictionary: Record<string, unknown>): string {
const dict = Object(dictionary);
const defined = Object.prototype.hasOwnProperty.bind(dict);
return (template + '').replace(/\{\{(\w+)\}\}/g, (match, key) => {
return defined(key) ? dict[key] + '' : '';
});
}
function getCursorURN(name: string, pointer: boolean, color: string) {
const type = pointer ? 'pointer' : 'cursor';
return `${type}:${name}/${color}`;
}
function createSVGMouseCursor(
descriptor: SVGCursorDescriptor,
name: string,
pointer: boolean,
color: string,
fallback: MouseCursor
): SVGMouseCursor {
const { x, y } = descriptor.mousePoint;
return new SVGMouseCursor(
createSVGIconUrl(descriptor, pointer, { color }),
x,
y,
name,
fallback
);
}
function createSVGIconUrl(
descriptor: SVGCursorDescriptor,
pointer: boolean,
options: Record<string, unknown>
): string {
return URL.createObjectURL(createSVGIconBlob(descriptor, pointer, options));
}
function createSVGIconBlob(
descriptor: SVGCursorDescriptor,
pointer: boolean,
options: Record<string, unknown>
): Blob {
const svgString = (pointer ? createSVGIconWithPointer : createSVGIcon)(
descriptor,
options
);
return new Blob([svgString], { type: 'image/svg+xml' });
}
function createSVGIcon(
descriptor: SVGCursorDescriptor,
options: Record<string, unknown>
): string {
const { iconContent, iconSize, viewBox } = descriptor;
const svgString = `
<svg data-icon="cursor" role="img" xmlns="http://www.w3.org/2000/svg"
width="${iconSize}" height="${iconSize}" viewBox="0 0
${viewBox.x} ${viewBox.y}">
${iconContent}
</svg>`;
return format(svgString, options);
}
function createSVGIconWithPointer(
descriptor: SVGCursorDescriptor,
options: Record<string, unknown>
) {
const { iconContent, iconSize, viewBox, mousePointerGroupString } =
descriptor;
const scale = iconSize / Math.max(viewBox.x, viewBox.y, 1);
const svgSize = 16 + iconSize;
const svgString = `
<svg data-icon="cursor" role="img" xmlns="http://www.w3.org/2000/svg"
width="${svgSize}" height="${svgSize}" viewBox="0 0 ${svgSize} ${svgSize}">
<g>${mousePointerGroupString}</g>
<g transform="translate(16, 16) scale(${scale})">${iconContent}</g>
</svg>`;
return format(svgString, options);
}
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