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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 | 1x 209x 209x 209x 209x 209x 247x 209x 209x 209x 209x 209x 560x 560x 247x 313x 313x 313x 247x 247x 247x 209x 53x 156x 387x 387x | import { state } from '../store';
import { getEnabledElement } from '@cornerstonejs/core';
import { SVGDrawingHelper } from '../types';
const VIEWPORT_ELEMENT = 'viewport-element';
/**
* Returns the SVG drawing helper for the given HTML element.
* @param element - The HTML element to get the SVG drawing helper for.
* @private
*/
function getSvgDrawingHelper(element: HTMLDivElement): SVGDrawingHelper {
const enabledElement = getEnabledElement(element);
const { viewportId, renderingEngineId } = enabledElement;
const canvasHash = `${viewportId}:${renderingEngineId}`;
const svgLayerElement = _getSvgLayer(element);
// Reset touched
Object.keys(state.svgNodeCache[canvasHash]).forEach((cacheKey) => {
state.svgNodeCache[canvasHash][cacheKey].touched = false;
});
return {
svgLayerElement: svgLayerElement,
svgNodeCacheForCanvas: state.svgNodeCache,
getSvgNode: getSvgNode.bind(this, canvasHash),
appendNode: appendNode.bind(this, svgLayerElement, canvasHash),
setNodeTouched: setNodeTouched.bind(this, canvasHash),
clearUntouched: clearUntouched.bind(this, svgLayerElement, canvasHash),
};
}
/**
*
* @param element
* @private
*/
function _getSvgLayer(element) {
const viewportElement = `.${VIEWPORT_ELEMENT}`;
const internalDivElement = element.querySelector(viewportElement);
// Using :scope to make sure the right svg layer is selected otherwise it
// may select one from a nested viewport (eg: AdvancedMagnifyTool).
const svgLayer = internalDivElement.querySelector(':scope > .svg-layer');
return svgLayer;
}
function getSvgNode(canvasHash, cacheKey) {
// If state has been reset
Iif (!state.svgNodeCache[canvasHash]) {
return;
}
if (state.svgNodeCache[canvasHash][cacheKey]) {
return state.svgNodeCache[canvasHash][cacheKey].domRef;
}
}
function appendNode(svgLayerElement, canvasHash, svgNode, cacheKey) {
// If state has been reset
Iif (!state.svgNodeCache[canvasHash]) {
return null;
}
state.svgNodeCache[canvasHash][cacheKey] = {
touched: true,
domRef: svgNode,
};
svgLayerElement.appendChild(svgNode);
}
function setNodeTouched(canvasHash, cacheKey) {
// If state has been reset
Iif (!state.svgNodeCache[canvasHash]) {
return;
}
Eif (state.svgNodeCache[canvasHash][cacheKey]) {
state.svgNodeCache[canvasHash][cacheKey].touched = true;
}
}
function clearUntouched(svgLayerElement, canvasHash) {
// If state has been reset
if (!state.svgNodeCache[canvasHash]) {
return;
}
Object.keys(state.svgNodeCache[canvasHash]).forEach((cacheKey) => {
const cacheEntry = state.svgNodeCache[canvasHash][cacheKey];
Iif (!cacheEntry.touched && cacheEntry.domRef) {
svgLayerElement.removeChild(cacheEntry.domRef);
delete state.svgNodeCache[canvasHash][cacheKey];
}
});
}
export default getSvgDrawingHelper;
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