@aws/pdk
Version:
All documentation is located at: https://aws.github.io/aws-pdk
272 lines • 32.1 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.addGraphFontCssStyles = addGraphFontCssStyles;
exports.resolveSvgAwsArchAssetImagesInline = resolveSvgAwsArchAssetImagesInline;
exports.encodeDataUrl = encodeDataUrl;
exports.encodeHtmlDataUrl = encodeHtmlDataUrl;
exports.encodeSvgFileDataUrl = encodeSvgFileDataUrl;
exports.reconcileViewBox = reconcileViewBox;
exports.getSvgRootContainer = getSvgRootContainer;
exports.parseSvgViewBox = parseSvgViewBox;
exports.stringifySvgViewBox = stringifySvgViewBox;
exports.parseSvgTransformScale = parseSvgTransformScale;
exports.unescapeSvgTextValues = unescapeSvgTextValues;
/*! Copyright [Amazon.com](http://amazon.com/), Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0 */
const aws_arch_1 = require("../../../aws-arch");
const fs = require("fs-extra");
const he = require("he"); // eslint-disable-line @typescript-eslint/no-require-imports
const svgson = require("svgson");
const traverse = require("traverse"); // eslint-disable-line @typescript-eslint/no-require-imports
const fonts_1 = require("../fonts");
const XLINK_HREF = "xlink:href";
const DATAURL_SVG_BASE64 = "data:image/svg+xml;base64,";
/**
* Add graph font css styles to svg
* @internal
*/
function addGraphFontCssStyles(svg) {
svg.children.unshift({
name: "style",
type: "element",
value: "",
attributes: {},
children: [
{
name: "",
type: "text",
attributes: {},
children: [],
value: fonts_1.FONT_CSS_CLASSES,
},
],
});
}
/**
* Resolve SVG image paths to inline base64 **Data URLs**.
* @internal
*/
async function resolveSvgAwsArchAssetImagesInline(svgString) {
let svg = await svgson.parse(svgString);
const imageDefs = new Map();
svg = traverse(svg).forEach(function (x) {
if (typeof x === "object" && x?.type === "element") {
const node = x;
if (node.name !== "image") {
return;
}
const xlinkHref = node.attributes[XLINK_HREF];
const isAssetPath = xlinkHref &&
xlinkHref.length &&
!(xlinkHref.startsWith("http") ||
(xlinkHref.startsWith("/") &&
!xlinkHref.startsWith(aws_arch_1.AwsArchitecture.assetDirectory)));
if (isAssetPath) {
const { width, height, value, [XLINK_HREF]: assetPath, ...attributes } = node.attributes;
const id = aws_arch_1.AwsArchitecture.parseAssetPath(assetPath).assetKey;
if (!imageDefs.has(id)) {
imageDefs.set(id, {
type: "element",
name: "image",
value,
children: [],
attributes: {
id,
width,
height,
[XLINK_HREF]: aws_arch_1.AwsArchitecture.resolveAssetPath(assetPath),
},
});
}
const useDefNode = {
type: "element",
name: "use",
value,
children: [],
attributes: {
...attributes,
[XLINK_HREF]: `#${id}`,
},
};
this.update(useDefNode, true);
}
}
});
for (const [, imageDef] of imageDefs.entries()) {
const href = imageDef.attributes[XLINK_HREF];
imageDef.attributes[XLINK_HREF] = await encodeSvgFileDataUrl(href);
}
svg.children.unshift({
type: "element",
name: "defs",
value: "",
attributes: {},
children: Array.from(imageDefs.values()),
});
addGraphFontCssStyles(svg);
reconcileViewBox(svg);
return svgson.stringify(svg);
}
/**
* Encode buffer as base64 encoded **Data URL**
* @internal
*/
function encodeDataUrl(buffer, prefix) {
return prefix + buffer.toString("base64");
}
/**
* Encode string as html and base64 encoded **Data URL**
* @internal
*/
function encodeHtmlDataUrl(data, prefix) {
return encodeDataUrl(Buffer.from(unescape(encodeURIComponent(data)), "utf-8"), prefix);
}
/**
* Encode SVG file as base64 encoded **Data URL**
* @internal
*/
async function encodeSvgFileDataUrl(svgFile) {
const svgXml = await fs.readFile(svgFile, { encoding: "utf-8" });
return encodeHtmlDataUrl(svgXml, DATAURL_SVG_BASE64);
}
/**
* ==== VIEWBOX ====
*/
const CSS_TRANSFORM_SCALE = /scale\((?<scale>[^)]+)\)/i;
/**
* Reconcile svg viewBox attribute based on root container ([g](https://developer.mozilla.org/en-US/docs/Web/SVG/Element/g)) scale.
*
* This will modify the viewbox and root container in place.
* @param svg Svg to reconcile
* @throws Error if svg does not define `viewBox` attribute
* @internal
*/
function reconcileViewBox(svg) {
const viewBox = parseSvgViewBox(svg);
if (viewBox == null || !viewBox.width || !viewBox.height) {
throw new Error("Svg `viewBox` undefined or does not define dimensions");
}
// drop width/height to ensure only reconciled viewbox is used
delete svg.attributes.width;
delete svg.attributes.height;
const container = getSvgRootContainer(svg);
if (container == null) {
return;
}
// let [x, y, width, height] = viewBox.split(" ").map((v) => parseFloat(v)) as [number, number, number, number];
let scale = parseSvgTransformScale(container);
if (scale == null) {
return;
}
let scaledViewBox = {
...viewBox,
width: viewBox.width * (scale[0] || 1),
height: viewBox.height * (scale[1] || scale[0] || 1),
};
// Max allowed by sharp: https://github.com/lovell/sharp/blob/2c465282699432299c478ba00ab825e07d9bdab0/src/pipeline.cc#L288
const MAX_SVG = 10000; // 32767 is max width & height in sharp, but capping at 10k for perf and downscale huge diagrams
if (scaledViewBox.width && scaledViewBox.width > MAX_SVG) {
const downscale = MAX_SVG / scaledViewBox.width;
scaledViewBox = {
...scaledViewBox,
width: scaledViewBox.width * downscale,
height: scaledViewBox.height
? scaledViewBox.height * downscale
: undefined,
};
if (scale[0])
scale[0] *= downscale;
if (scale[1])
scale[1] *= downscale;
}
if (scaledViewBox.height && scaledViewBox.height > MAX_SVG) {
const downscale = MAX_SVG / scaledViewBox.height;
scaledViewBox = {
...scaledViewBox,
height: scaledViewBox.height * downscale,
width: scaledViewBox.width ? scaledViewBox.width * downscale : undefined,
};
if (scale[0])
scale[0] *= downscale;
if (scale[1])
scale[1] *= downscale;
}
svg.attributes.viewBox = stringifySvgViewBox(scaledViewBox);
if (scale[0] || scale[1]) {
const _scale = scale.filter((v) => v != null && !isNaN(v)).join(" ");
container.attributes.transform = container.attributes.transform.replace(CSS_TRANSFORM_SCALE, `scale(${_scale})`);
}
}
/**
* Get SVG root container - the first "g" element
* @internal
*/
function getSvgRootContainer(svg) {
return svg.children.find((child) => child.name === "g");
}
/** Parse SVG viewBox */
function parseSvgViewBox(svgOrViewBox) {
let viewBox;
if (typeof svgOrViewBox === "object") {
viewBox = svgOrViewBox.attributes.viewBox;
}
else {
viewBox = svgOrViewBox;
}
if (viewBox == null || viewBox === "") {
return undefined;
}
let [x, y, width, height] = viewBox.split(" ").map((v) => parseFloat(v));
return {
x: x || 0,
y: y || 0,
width,
height,
};
}
/** Stringify SVG viewBox attribute */
function stringifySvgViewBox(viewBox) {
return [viewBox.x, viewBox.y, viewBox.width, viewBox.height]
.filter((v) => v != null)
.join(" ");
}
/** Parse SVG transform attribute scale property */
function parseSvgTransformScale(elementOrTransform) {
let transform;
if (typeof elementOrTransform === "object") {
transform = elementOrTransform.attributes.transform;
}
else {
transform = elementOrTransform;
}
if (transform == null || transform === "") {
return undefined;
}
const transformScale = transform?.match(CSS_TRANSFORM_SCALE)?.groups?.scale;
if (transformScale == null) {
return undefined;
}
return transformScale.split(" ").map((v) => parseFloat(v));
}
/**
* Unescape SVG **text** values.
*
* *dot-wasm* escapes svg text ("-" -> "-") and [svgson](https://github.com/elrumordelaluz/svgson/blob/e7234b645b4e344f525d4d2fde2d3f2911d3a75a/src/stringify.js#L20)
* escapes strings that contain *&...* by wrapping in `<![CDATA[...]]>` tag which causes the
* resulting text value in SVG and PNG files to show raw escaped value (`-`).
*
* We expect to have the original text values rendered rather than escaped version rendered.
*
* @example `Diagram (hyphenated-value)` => `Diagram (hyphenated-value)`
* @internal
*/
function unescapeSvgTextValues(svg) {
traverse(svg).forEach(function (x) {
if (this.key === "value" && typeof x === "string" && x !== "") {
if (x.includes("&")) {
this.update(he.decode(x), true);
}
}
});
}
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Copyright [Amazon.com](http://amazon.com/), Inc. or its affiliates. All Rights Reserved.\nSPDX-License-Identifier: Apache-2.0 */\nimport { AwsArchitecture } from \"@aws/aws-arch\";\nimport * as fs from \"fs-extra\";\nimport he = require(\"he\"); // eslint-disable-line @typescript-eslint/no-require-imports\nimport * as svgson from \"svgson\";\nimport traverse = require(\"traverse\"); // eslint-disable-line @typescript-eslint/no-require-imports\nimport { FONT_CSS_CLASSES } from \"../fonts\";\n\nconst XLINK_HREF = \"xlink:href\";\n\nconst DATAURL_SVG_BASE64 = \"data:image/svg+xml;base64,\";\n\n/**\n * Add graph font css styles to svg\n * @internal\n */\nexport function addGraphFontCssStyles(svg: svgson.INode): void {\n  svg.children.unshift({\n    name: \"style\",\n    type: \"element\",\n    value: \"\",\n    attributes: {},\n    children: [\n      {\n        name: \"\",\n        type: \"text\",\n        attributes: {},\n        children: [],\n        value: FONT_CSS_CLASSES,\n      },\n    ],\n  });\n}\n\n/**\n * Resolve SVG image paths to inline base64 **Data URLs**.\n * @internal\n */\nexport async function resolveSvgAwsArchAssetImagesInline(\n  svgString: string\n): Promise<string> {\n  let svg: svgson.INode = await svgson.parse(svgString);\n  const imageDefs = new Map<string, svgson.INode>();\n\n  svg = traverse(svg).forEach(function (this: traverse.TraverseContext, x) {\n    if (typeof x === \"object\" && x?.type === \"element\") {\n      const node = x as svgson.INode;\n      if (node.name !== \"image\") {\n        return;\n      }\n\n      const xlinkHref = node.attributes[XLINK_HREF];\n      const isAssetPath =\n        xlinkHref &&\n        xlinkHref.length &&\n        !(\n          xlinkHref.startsWith(\"http\") ||\n          (xlinkHref.startsWith(\"/\") &&\n            !xlinkHref.startsWith(AwsArchitecture.assetDirectory))\n        );\n\n      if (isAssetPath) {\n        const {\n          width,\n          height,\n          value,\n          [XLINK_HREF]: assetPath,\n          ...attributes\n        } = node.attributes;\n\n        const id = AwsArchitecture.parseAssetPath(assetPath!).assetKey;\n\n        if (!imageDefs.has(id)) {\n          imageDefs.set(id, {\n            type: \"element\",\n            name: \"image\",\n            value,\n            children: [],\n            attributes: {\n              id,\n              width,\n              height,\n              [XLINK_HREF]: AwsArchitecture.resolveAssetPath(assetPath),\n            },\n          });\n        }\n\n        const useDefNode: svgson.INode = {\n          type: \"element\",\n          name: \"use\",\n          value,\n          children: [],\n          attributes: {\n            ...attributes,\n            [XLINK_HREF]: `#${id}`,\n          },\n        };\n\n        this.update(useDefNode, true);\n      }\n    }\n  });\n\n  for (const [, imageDef] of imageDefs.entries()) {\n    const href = imageDef.attributes[XLINK_HREF];\n    imageDef.attributes[XLINK_HREF] = await encodeSvgFileDataUrl(href);\n  }\n\n  svg.children.unshift({\n    type: \"element\",\n    name: \"defs\",\n    value: \"\",\n    attributes: {},\n    children: Array.from(imageDefs.values()),\n  });\n\n  addGraphFontCssStyles(svg);\n  reconcileViewBox(svg);\n\n  return svgson.stringify(svg);\n}\n\n/**\n * Encode buffer as base64 encoded **Data URL**\n * @internal\n */\nexport function encodeDataUrl(buffer: Buffer, prefix: string): string {\n  return prefix + buffer.toString(\"base64\");\n}\n\n/**\n * Encode string as html and base64 encoded **Data URL**\n * @internal\n */\nexport function encodeHtmlDataUrl(data: string, prefix: string): string {\n  return encodeDataUrl(\n    Buffer.from(unescape(encodeURIComponent(data)), \"utf-8\"),\n    prefix\n  );\n}\n\n/**\n * Encode SVG file as base64 encoded **Data URL**\n * @internal\n */\nexport async function encodeSvgFileDataUrl(svgFile: string): Promise<string> {\n  const svgXml = await fs.readFile(svgFile, { encoding: \"utf-8\" });\n  return encodeHtmlDataUrl(svgXml, DATAURL_SVG_BASE64);\n}\n\n/**\n * ==== VIEWBOX ====\n */\n\nconst CSS_TRANSFORM_SCALE = /scale\\((?<scale>[^)]+)\\)/i;\n\n/**\n * SVG `viewBox` struct\n * @internal\n */\nexport interface SvgViewBox {\n  readonly x: number;\n  readonly y: number;\n  readonly width?: number;\n  readonly height?: number;\n}\n\n/**\n * Reconcile svg viewBox attribute based on root container ([g](https://developer.mozilla.org/en-US/docs/Web/SVG/Element/g)) scale.\n *\n * This will modify the viewbox and root container in place.\n * @param svg Svg to reconcile\n * @throws Error if svg does not define `viewBox` attribute\n * @internal\n */\nexport function reconcileViewBox(svg: svgson.INode): void {\n  const viewBox = parseSvgViewBox(svg);\n  if (viewBox == null || !viewBox.width || !viewBox.height) {\n    throw new Error(\"Svg `viewBox` undefined or does not define dimensions\");\n  }\n\n  // drop width/height to ensure only reconciled viewbox is used\n  delete svg.attributes.width;\n  delete svg.attributes.height;\n\n  const container = getSvgRootContainer(svg);\n  if (container == null) {\n    return;\n  }\n\n  // let [x, y, width, height] = viewBox.split(\" \").map((v) => parseFloat(v)) as [number, number, number, number];\n  let scale = parseSvgTransformScale(container);\n  if (scale == null) {\n    return;\n  }\n\n  let scaledViewBox: SvgViewBox = {\n    ...viewBox,\n    width: viewBox.width * (scale[0] || 1),\n    height: viewBox.height * (scale[1] || scale[0] || 1),\n  };\n\n  // Max allowed by sharp: https://github.com/lovell/sharp/blob/2c465282699432299c478ba00ab825e07d9bdab0/src/pipeline.cc#L288\n  const MAX_SVG = 10000; // 32767 is max width & height in sharp, but capping at 10k for perf and downscale huge diagrams\n\n  if (scaledViewBox.width && scaledViewBox.width > MAX_SVG) {\n    const downscale = MAX_SVG / scaledViewBox.width;\n    scaledViewBox = {\n      ...scaledViewBox,\n      width: scaledViewBox.width * downscale,\n      height: scaledViewBox.height\n        ? scaledViewBox.height * downscale\n        : undefined,\n    };\n    if (scale[0]) scale[0] *= downscale;\n    if (scale[1]) scale[1] *= downscale;\n  }\n\n  if (scaledViewBox.height && scaledViewBox.height > MAX_SVG) {\n    const downscale = MAX_SVG / scaledViewBox.height;\n    scaledViewBox = {\n      ...scaledViewBox,\n      height: scaledViewBox.height * downscale,\n      width: scaledViewBox.width ? scaledViewBox.width * downscale : undefined,\n    };\n    if (scale[0]) scale[0] *= downscale;\n    if (scale[1]) scale[1] *= downscale;\n  }\n\n  svg.attributes.viewBox = stringifySvgViewBox(scaledViewBox);\n  if (scale[0] || scale[1]) {\n    const _scale = scale.filter((v) => v != null && !isNaN(v)).join(\" \");\n    container.attributes.transform = container.attributes.transform.replace(\n      CSS_TRANSFORM_SCALE,\n      `scale(${_scale})`\n    );\n  }\n}\n\n/**\n * Get SVG root container - the first \"g\" element\n * @internal\n */\nexport function getSvgRootContainer(\n  svg: svgson.INode\n): svgson.INode | undefined {\n  return svg.children.find((child) => child.name === \"g\");\n}\n\n/** Parse SVG viewBox */\nexport function parseSvgViewBox(\n  svgOrViewBox: svgson.INode | string\n): SvgViewBox | undefined {\n  let viewBox: string;\n  if (typeof svgOrViewBox === \"object\") {\n    viewBox = svgOrViewBox.attributes.viewBox;\n  } else {\n    viewBox = svgOrViewBox;\n  }\n  if (viewBox == null || viewBox === \"\") {\n    return undefined;\n  }\n  let [x, y, width, height] = viewBox.split(\" \").map((v) => parseFloat(v)) as [\n    number,\n    number,\n    number,\n    number\n  ];\n\n  return {\n    x: x || 0,\n    y: y || 0,\n    width,\n    height,\n  };\n}\n\n/** Stringify SVG viewBox attribute */\nexport function stringifySvgViewBox(viewBox: SvgViewBox): string {\n  return [viewBox.x, viewBox.y, viewBox.width, viewBox.height]\n    .filter((v) => v != null)\n    .join(\" \");\n}\n\n/** Parse SVG transform attribute scale property */\nexport function parseSvgTransformScale(\n  elementOrTransform: svgson.INode | string\n): number[] | undefined {\n  let transform: string;\n  if (typeof elementOrTransform === \"object\") {\n    transform = elementOrTransform.attributes.transform;\n  } else {\n    transform = elementOrTransform;\n  }\n  if (transform == null || transform === \"\") {\n    return undefined;\n  }\n\n  const transformScale = transform?.match(CSS_TRANSFORM_SCALE)?.groups?.scale;\n  if (transformScale == null) {\n    return undefined;\n  }\n\n  return transformScale.split(\" \").map((v) => parseFloat(v));\n}\n\n/**\n * Unescape SVG **text** values.\n *\n * *dot-wasm* escapes svg text (\"-\" -> \"&#45;\") and [svgson](https://github.com/elrumordelaluz/svgson/blob/e7234b645b4e344f525d4d2fde2d3f2911d3a75a/src/stringify.js#L20)\n * escapes strings that contain *&...* by wrapping in `<![CDATA[...]]>` tag which causes the\n * resulting text value in SVG and PNG files to show raw escaped value (`&#45;`).\n *\n * We expect to have the original text values rendered rather than escaped version rendered.\n *\n * @example `Diagram (hyphenated&#45;value)` => `Diagram (hyphenated-value)`\n * @internal\n */\nexport function unescapeSvgTextValues(svg: svgson.INode): void {\n  traverse(svg).forEach(function (this: traverse.TraverseContext, x) {\n    if (this.key === \"value\" && typeof x === \"string\" && x !== \"\") {\n      if (x.includes(\"&\")) {\n        this.update(he.decode(x), true);\n      }\n    }\n  });\n}\n"]}