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removeBlankPages. backend only

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This commit is contained in:
Felix Kaspar 2024-05-13 20:46:04 +02:00
parent f587797ddb
commit e72f3d5525
6 changed files with 117 additions and 96 deletions
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package-lock.json generated
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"version": "7.5.4",
"resolved": "https://registry.npmjs.org/semver/-/semver-7.5.4.tgz",
"integrity": "sha512-1bCSESV6Pv+i21Hvpxp3Dx+pSD8lIPt8uVjRrxAUt/nbswYc+tK6Y2btiULjd4+fnq15PX+nqQDC7Oft7WkwcA==",
"devOptional": true,
"dependencies": {
"lru-cache": "^6.0.0"
},
@ -8193,7 +8162,6 @@
"version": "6.0.0",
"resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
"integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
"devOptional": true,
"dependencies": {
"yallist": "^4.0.0"
},
@ -8204,8 +8172,7 @@
"node_modules/semver/node_modules/yallist": {
"version": "4.0.0",
"resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
"integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
"devOptional": true
"integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
},
"node_modules/send": {
"version": "0.18.0",
@ -8265,8 +8232,7 @@
"node_modules/set-blocking": {
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
"integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
"optional": true
"integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw=="
},
"node_modules/set-function-length": {
"version": "1.1.1",
@ -8350,8 +8316,7 @@
"node_modules/signal-exit": {
"version": "3.0.7",
"resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.7.tgz",
"integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ==",
"optional": true
"integrity": "sha512-wnD2ZE+l+SPC/uoS0vXeE9L1+0wuaMqKlfz9AMUo38JsyLSBWSFcHR1Rri62LZc12vLr1gb3jl7iwQhgwpAbGQ=="
},
"node_modules/simple-concat": {
"version": "1.0.1",
@ -8370,14 +8335,12 @@
"type": "consulting",
"url": "https://feross.org/support"
}
],
"optional": true
]
},
"node_modules/simple-get": {
"version": "3.1.1",
"resolved": "https://registry.npmjs.org/simple-get/-/simple-get-3.1.1.tgz",
"integrity": "sha512-CQ5LTKGfCpvE1K0n2us+kuMPbk/q0EKl82s4aheV9oXjFEz6W/Y7oQFVJuU6QG77hRT4Ghb5RURteF5vnWjupA==",
"optional": true,
"dependencies": {
"decompress-response": "^4.2.0",
"once": "^1.3.1",
@ -8506,7 +8469,6 @@
"version": "4.2.3",
"resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
"integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
"devOptional": true,
"dependencies": {
"emoji-regex": "^8.0.0",
"is-fullwidth-code-point": "^3.0.0",
@ -8535,7 +8497,6 @@
"version": "6.0.1",
"resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
"integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
"devOptional": true,
"dependencies": {
"ansi-regex": "^5.0.1"
},
@ -8626,7 +8587,6 @@
"version": "6.2.0",
"resolved": "https://registry.npmjs.org/tar/-/tar-6.2.0.tgz",
"integrity": "sha512-/Wo7DcT0u5HUV486xg675HtjNd3BXZ6xDbzsCUZPt5iw8bTQ63bP0Raut3mvro9u+CUyq7YQd8Cx55fsZXxqLQ==",
"optional": true,
"dependencies": {
"chownr": "^2.0.0",
"fs-minipass": "^2.0.0",
@ -8657,8 +8617,7 @@
"node_modules/tar/node_modules/yallist": {
"version": "4.0.0",
"resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
"integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
"optional": true
"integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
},
"node_modules/text-table": {
"version": "0.2.0",
@ -8773,8 +8732,7 @@
"node_modules/tr46": {
"version": "0.0.3",
"resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
"integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==",
"optional": true
"integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw=="
},
"node_modules/tree-dump": {
"version": "1.0.1",
@ -9039,9 +8997,9 @@
"integrity": "sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA=="
},
"node_modules/typescript": {
"version": "5.3.3",
"resolved": "https://registry.npmjs.org/typescript/-/typescript-5.3.3.tgz",
"integrity": "sha512-pXWcraxM0uxAS+tN0AG/BF2TyqmHO014Z070UsJ+pFvYuRSq8KH8DmWpnbXe0pEPDHXZV3FcAbJkijJ5oNEnWw==",
"version": "5.4.5",
"resolved": "https://registry.npmjs.org/typescript/-/typescript-5.4.5.tgz",
"integrity": "sha512-vcI4UpRgg81oIRUFwR0WSIHKt11nJ7SAVlYNIu+QpqeyXP+gpQJy/Z4+F0aGxSE4MqwjyXvW/TzgkLAx2AGHwQ==",
"dev": true,
"bin": {
"tsc": "bin/tsc",
@ -9817,14 +9775,12 @@
"node_modules/webidl-conversions": {
"version": "3.0.1",
"resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
"integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==",
"optional": true
"integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ=="
},
"node_modules/whatwg-url": {
"version": "5.0.0",
"resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
"integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
"optional": true,
"dependencies": {
"tr46": "~0.0.3",
"webidl-conversions": "^3.0.0"
@ -9867,7 +9823,6 @@
"version": "1.1.5",
"resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.5.tgz",
"integrity": "sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==",
"optional": true,
"dependencies": {
"string-width": "^1.0.2 || 2 || 3 || 4"
}
@ -10645,6 +10600,7 @@
"dependencies": {
"@stirling-tools/joi": "github:Stirling-Tools/joi",
"buffer": "^6.0.3",
"canvas": "^2.11.2",
"i18next-resources-to-backend": "^1.2.0",
"image-js": "^0.35.5",
"memfs": "^4.9.2",
@ -10693,6 +10649,18 @@
"type": "github",
"url": "https://github.com/sponsors/streamich"
}
},
"shared-operations/node_modules/pdfjs-dist": {
"version": "4.0.269",
"resolved": "https://registry.npmjs.org/pdfjs-dist/-/pdfjs-dist-4.0.269.tgz",
"integrity": "sha512-jjWO56tcOjnmPqDf8PmXDeZ781AGvpHMYI3HhNtaFKTRXXPaD1ArSrhVe38/XsrIQJ0onISCND/vuXaWJkiDWw==",
"engines": {
"node": ">=18"
},
"optionalDependencies": {
"canvas": "^2.11.2",
"path2d-polyfill": "^2.0.1"
}
}
}
}

1
shared-operations/package.json
View File

@ -11,6 +11,7 @@
"dependencies": {
"@stirling-tools/joi": "github:Stirling-Tools/joi",
"buffer": "^6.0.3",
"canvas": "^2.11.2",
"i18next-resources-to-backend": "^1.2.0",
"image-js": "^0.35.5",
"memfs": "^4.9.2",

10
shared-operations/public/locales/removeBlankPages/en.json Normal file
View File

@ -0,0 +1,10 @@
{
"friendlyName": "Remove Blank Pages",
"description": "Remove pages without .",
"values": {
"whiteThreashold": {
"friendlyName": "Image White Threashold",
"description": "0-255 the tolerance for near white images. 0 - Almost white is detected as empty. 255 - No images are detected as empty."
}
}
}

6
shared-operations/src/functions/common/getImagesOnPage.ts
View File

@ -3,6 +3,8 @@ import { PDFPageProxy } from "pdfjs-dist/types/src/display/api";
import * as PDFJS from "pdfjs-dist";
import { createCanvas } from "canvas";
export interface PDFJSImage {
width: number;
height: number;
@ -16,7 +18,9 @@ export async function getImagesOnPage(page: PDFPageProxy): Promise<PDFJSImage[]>
const images: PDFJSImage[] = [];
for (let j=0; j < ops.fnArray.length; j++) {
if (ops.fnArray[j] == PDFJS.OPS.paintImageXObject) {
const image = page.objs.get(ops.argsArray[j][0]) as PDFJSImage;
const image: PDFJSImage = page.objs.get(ops.argsArray[j][0])
console.log("Image: ", image);
images.push(image);
}
}

67
shared-operations/src/functions/removeBlankPages.ts
View File

@ -1,23 +1,58 @@
import { Operator, Progress, oneToOne } from ".";
import Joi from "@stirling-tools/joi";
import { JoiPDFFileSchema } from "../wrappers/PdfFileJoi";
import i18next from "i18next";
import { PdfFile } from "../wrappers/PdfFile";
import { detectEmptyPages } from "./common/detectEmptyPages";
import { getPages } from "./common/getPagesByIndex";
import { invertSelection } from "./common/pageIndexesUtils";
export interface RemoveBlankPagesParamsType {
file: PdfFile;
whiteThreashold: number;
export class RemoveBlankPages extends Operator {
static type = "removeBlankPages";
/**
* Validation & Localisation
*/
protected static inputSchema = JoiPDFFileSchema.label(i18next.t("inputs.pdffile.name")).description(i18next.t("inputs.pdffile.description"));
protected static valueSchema = Joi.object({
whiteThreashold: Joi.number().min(0).max(255).required()
.label(i18next.t("values.whiteThreashold.friendlyName", { ns: "removeBlankPages" })).description(i18next.t("values.whiteThreashold.description", { ns: "removeBlankPages" }))
.example("10").example("0").example("255").required()
});
protected static outputSchema = JoiPDFFileSchema.label(i18next.t("outputs.pdffile.name")).description(i18next.t("outputs.pdffile.description"));
static schema = Joi.object({
input: RemoveBlankPages.inputSchema,
values: RemoveBlankPages.valueSchema.required(),
output: RemoveBlankPages.outputSchema
}).label(i18next.t("friendlyName", { ns: "removeBlankPages" })).description(i18next.t("description", { ns: "removeBlankPages" }));
/**
* Logic
*/
/** Detect and remove white pages */
async run(input: PdfFile[], progressCallback: (state: Progress) => void): Promise<PdfFile[]> {
return oneToOne<PdfFile, PdfFile>(input, async (input, index, max) => {
const pdfDoc = await input.pdfLibDocument;
const pageCount = pdfDoc.getPageCount();
progressCallback({ curFileProgress: 0, operationProgress: index/max });
const emptyPages = await detectEmptyPages(input, this.actionValues.whiteThreashold);
progressCallback({ curFileProgress: 0.6, operationProgress: index/max });
const pagesToKeep = invertSelection(emptyPages, pageCount);
progressCallback({ curFileProgress: 0.3, operationProgress: index/max });
const result = await getPages(input, pagesToKeep);
progressCallback({ curFileProgress: 1, operationProgress: index/max });
result.filename += "_removedBlanks";
return result;
});
}
}
export async function removeBlankPages(params: RemoveBlankPagesParamsType) {
const { file, whiteThreashold } = params;
const pdfDoc = await file.pdfLibDocument;
const pageCount = pdfDoc.getPageCount();
const emptyPages = await detectEmptyPages(file, whiteThreashold);
console.debug("Empty Pages: ", emptyPages);
const pagesToKeep = invertSelection(emptyPages, pageCount);
const newFile = await getPages(file, pagesToKeep);
newFile.filename += "_removedBlanks";
return newFile;
}

5
shared-operations/tsconfig.json
View File

@ -6,6 +6,9 @@
"baseUrl": "./src", /* Specify the base directory to resolve non-relative module names. */
"paths": {
"#pdfcpu": ["../../shared-operations/src/wasm/pdfcpu/pdfcpu-wrapper.server"],
}
},
"types": [
"vite/client"
],
} /* Specify a set of entries that re-map imports to additional lookup locations. */
}