115 lines
3.8 KiB
JavaScript
115 lines
3.8 KiB
JavaScript
import { defaultIconProps } from "../icon/defaults.js";
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import { defaultIconCustomisations } from "../customisations/defaults.js";
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import { calculateSize } from "./size.js";
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import { wrapSVGContent } from "./defs.js";
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/**
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* Check if value should be unset. Allows multiple keywords
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*/
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const isUnsetKeyword = (value) => value === "unset" || value === "undefined" || value === "none";
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/**
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* Get SVG attributes and content from icon + customisations
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*
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* Does not generate style to make it compatible with frameworks that use objects for style, such as React.
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* Instead, it generates 'inline' value. If true, rendering engine should add verticalAlign: -0.125em to icon.
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*
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* Customisations should be normalised by platform specific parser.
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* Result should be converted to <svg> by platform specific parser.
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* Use replaceIDs to generate unique IDs for body.
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*/
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function iconToSVG(icon, customisations) {
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const fullIcon = {
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...defaultIconProps,
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...icon
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};
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const fullCustomisations = {
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...defaultIconCustomisations,
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...customisations
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};
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const box = {
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left: fullIcon.left,
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top: fullIcon.top,
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width: fullIcon.width,
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height: fullIcon.height
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};
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let body = fullIcon.body;
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[fullIcon, fullCustomisations].forEach((props) => {
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const transformations = [];
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const hFlip = props.hFlip;
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const vFlip = props.vFlip;
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let rotation = props.rotate;
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if (hFlip) if (vFlip) rotation += 2;
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else {
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transformations.push("translate(" + (box.width + box.left).toString() + " " + (0 - box.top).toString() + ")");
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transformations.push("scale(-1 1)");
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box.top = box.left = 0;
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}
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else if (vFlip) {
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transformations.push("translate(" + (0 - box.left).toString() + " " + (box.height + box.top).toString() + ")");
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transformations.push("scale(1 -1)");
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box.top = box.left = 0;
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}
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let tempValue;
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if (rotation < 0) rotation -= Math.floor(rotation / 4) * 4;
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rotation = rotation % 4;
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switch (rotation) {
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case 1:
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tempValue = box.height / 2 + box.top;
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transformations.unshift("rotate(90 " + tempValue.toString() + " " + tempValue.toString() + ")");
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break;
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case 2:
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transformations.unshift("rotate(180 " + (box.width / 2 + box.left).toString() + " " + (box.height / 2 + box.top).toString() + ")");
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break;
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case 3:
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tempValue = box.width / 2 + box.left;
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transformations.unshift("rotate(-90 " + tempValue.toString() + " " + tempValue.toString() + ")");
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break;
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}
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if (rotation % 2 === 1) {
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if (box.left !== box.top) {
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tempValue = box.left;
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box.left = box.top;
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box.top = tempValue;
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}
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if (box.width !== box.height) {
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tempValue = box.width;
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box.width = box.height;
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box.height = tempValue;
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}
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}
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if (transformations.length) body = wrapSVGContent(body, "<g transform=\"" + transformations.join(" ") + "\">", "</g>");
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});
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const customisationsWidth = fullCustomisations.width;
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const customisationsHeight = fullCustomisations.height;
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const boxWidth = box.width;
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const boxHeight = box.height;
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let width;
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let height;
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if (customisationsWidth === null) {
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height = customisationsHeight === null ? "1em" : customisationsHeight === "auto" ? boxHeight : customisationsHeight;
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width = calculateSize(height, boxWidth / boxHeight);
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} else {
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width = customisationsWidth === "auto" ? boxWidth : customisationsWidth;
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height = customisationsHeight === null ? calculateSize(width, boxHeight / boxWidth) : customisationsHeight === "auto" ? boxHeight : customisationsHeight;
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}
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const attributes = {};
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const setAttr = (prop, value) => {
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if (!isUnsetKeyword(value)) attributes[prop] = value.toString();
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};
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setAttr("width", width);
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setAttr("height", height);
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const viewBox = [
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box.left,
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box.top,
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boxWidth,
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boxHeight
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];
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attributes.viewBox = viewBox.join(" ");
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return {
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attributes,
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viewBox,
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body
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};
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}
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export { iconToSVG, isUnsetKeyword }; |