540 lines
13 KiB
JavaScript
540 lines
13 KiB
JavaScript
/**
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* @licstart The following is the entire license notice for the
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* JavaScript code in this page
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*
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* Copyright 2022 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @licend The above is the entire license notice for the
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* JavaScript code in this page
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*/
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.StatTimer = exports.RenderingCancelledException = exports.PixelsPerInch = exports.PageViewport = exports.PDFDateString = exports.DOMStandardFontDataFactory = exports.DOMSVGFactory = exports.DOMCanvasFactory = exports.DOMCMapReaderFactory = exports.AnnotationPrefix = void 0;
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exports.deprecated = deprecated;
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exports.getColorValues = getColorValues;
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exports.getCurrentTransform = getCurrentTransform;
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exports.getCurrentTransformInverse = getCurrentTransformInverse;
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exports.getFilenameFromUrl = getFilenameFromUrl;
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exports.getPdfFilenameFromUrl = getPdfFilenameFromUrl;
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exports.getRGB = getRGB;
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exports.getXfaPageViewport = getXfaPageViewport;
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exports.isDataScheme = isDataScheme;
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exports.isPdfFile = isPdfFile;
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exports.isValidFetchUrl = isValidFetchUrl;
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exports.loadScript = loadScript;
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var _base_factory = require("./base_factory.js");
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var _util = require("../shared/util.js");
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const SVG_NS = "http://www.w3.org/2000/svg";
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const AnnotationPrefix = "pdfjs_internal_id_";
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exports.AnnotationPrefix = AnnotationPrefix;
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class PixelsPerInch {
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static CSS = 96.0;
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static PDF = 72.0;
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static PDF_TO_CSS_UNITS = this.CSS / this.PDF;
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}
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exports.PixelsPerInch = PixelsPerInch;
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class DOMCanvasFactory extends _base_factory.BaseCanvasFactory {
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constructor({
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ownerDocument = globalThis.document
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} = {}) {
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super();
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this._document = ownerDocument;
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}
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_createCanvas(width, height) {
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const canvas = this._document.createElement("canvas");
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canvas.width = width;
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canvas.height = height;
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return canvas;
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}
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}
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exports.DOMCanvasFactory = DOMCanvasFactory;
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async function fetchData(url, asTypedArray = false) {
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if (isValidFetchUrl(url, document.baseURI)) {
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const response = await fetch(url);
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if (!response.ok) {
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throw new Error(response.statusText);
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}
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return asTypedArray ? new Uint8Array(await response.arrayBuffer()) : (0, _util.stringToBytes)(await response.text());
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}
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return new Promise((resolve, reject) => {
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const request = new XMLHttpRequest();
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request.open("GET", url, true);
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if (asTypedArray) {
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request.responseType = "arraybuffer";
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}
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request.onreadystatechange = () => {
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if (request.readyState !== XMLHttpRequest.DONE) {
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return;
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}
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if (request.status === 200 || request.status === 0) {
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let data;
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if (asTypedArray && request.response) {
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data = new Uint8Array(request.response);
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} else if (!asTypedArray && request.responseText) {
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data = (0, _util.stringToBytes)(request.responseText);
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}
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if (data) {
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resolve(data);
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return;
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}
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}
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reject(new Error(request.statusText));
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};
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request.send(null);
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});
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}
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class DOMCMapReaderFactory extends _base_factory.BaseCMapReaderFactory {
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_fetchData(url, compressionType) {
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return fetchData(url, this.isCompressed).then(data => {
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return {
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cMapData: data,
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compressionType
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};
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});
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}
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}
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exports.DOMCMapReaderFactory = DOMCMapReaderFactory;
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class DOMStandardFontDataFactory extends _base_factory.BaseStandardFontDataFactory {
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_fetchData(url) {
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return fetchData(url, true);
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}
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}
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exports.DOMStandardFontDataFactory = DOMStandardFontDataFactory;
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class DOMSVGFactory extends _base_factory.BaseSVGFactory {
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_createSVG(type) {
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return document.createElementNS(SVG_NS, type);
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}
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}
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exports.DOMSVGFactory = DOMSVGFactory;
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class PageViewport {
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constructor({
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viewBox,
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scale,
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rotation,
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offsetX = 0,
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offsetY = 0,
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dontFlip = false
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}) {
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this.viewBox = viewBox;
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this.scale = scale;
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this.rotation = rotation;
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this.offsetX = offsetX;
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this.offsetY = offsetY;
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const centerX = (viewBox[2] + viewBox[0]) / 2;
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const centerY = (viewBox[3] + viewBox[1]) / 2;
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let rotateA, rotateB, rotateC, rotateD;
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rotation %= 360;
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if (rotation < 0) {
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rotation += 360;
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}
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switch (rotation) {
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case 180:
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rotateA = -1;
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rotateB = 0;
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rotateC = 0;
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rotateD = 1;
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break;
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case 90:
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rotateA = 0;
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rotateB = 1;
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rotateC = 1;
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rotateD = 0;
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break;
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case 270:
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rotateA = 0;
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rotateB = -1;
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rotateC = -1;
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rotateD = 0;
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break;
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case 0:
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rotateA = 1;
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rotateB = 0;
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rotateC = 0;
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rotateD = -1;
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break;
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default:
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throw new Error("PageViewport: Invalid rotation, must be a multiple of 90 degrees.");
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}
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if (dontFlip) {
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rotateC = -rotateC;
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rotateD = -rotateD;
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}
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let offsetCanvasX, offsetCanvasY;
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let width, height;
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if (rotateA === 0) {
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offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX;
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offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY;
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width = Math.abs(viewBox[3] - viewBox[1]) * scale;
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height = Math.abs(viewBox[2] - viewBox[0]) * scale;
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} else {
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offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX;
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offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY;
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width = Math.abs(viewBox[2] - viewBox[0]) * scale;
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height = Math.abs(viewBox[3] - viewBox[1]) * scale;
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}
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this.transform = [rotateA * scale, rotateB * scale, rotateC * scale, rotateD * scale, offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY, offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY];
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this.width = width;
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this.height = height;
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}
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clone({
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scale = this.scale,
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rotation = this.rotation,
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offsetX = this.offsetX,
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offsetY = this.offsetY,
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dontFlip = false
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} = {}) {
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return new PageViewport({
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viewBox: this.viewBox.slice(),
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scale,
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rotation,
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offsetX,
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offsetY,
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dontFlip
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});
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}
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convertToViewportPoint(x, y) {
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return _util.Util.applyTransform([x, y], this.transform);
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}
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convertToViewportRectangle(rect) {
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const topLeft = _util.Util.applyTransform([rect[0], rect[1]], this.transform);
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const bottomRight = _util.Util.applyTransform([rect[2], rect[3]], this.transform);
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return [topLeft[0], topLeft[1], bottomRight[0], bottomRight[1]];
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}
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convertToPdfPoint(x, y) {
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return _util.Util.applyInverseTransform([x, y], this.transform);
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}
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}
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exports.PageViewport = PageViewport;
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class RenderingCancelledException extends _util.BaseException {
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constructor(msg, type) {
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super(msg, "RenderingCancelledException");
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this.type = type;
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}
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}
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exports.RenderingCancelledException = RenderingCancelledException;
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function isDataScheme(url) {
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const ii = url.length;
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let i = 0;
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while (i < ii && url[i].trim() === "") {
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i++;
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}
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return url.substring(i, i + 5).toLowerCase() === "data:";
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}
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function isPdfFile(filename) {
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return typeof filename === "string" && /\.pdf$/i.test(filename);
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}
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function getFilenameFromUrl(url) {
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const anchor = url.indexOf("#");
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const query = url.indexOf("?");
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const end = Math.min(anchor > 0 ? anchor : url.length, query > 0 ? query : url.length);
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return url.substring(url.lastIndexOf("/", end) + 1, end);
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}
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function getPdfFilenameFromUrl(url, defaultFilename = "document.pdf") {
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if (typeof url !== "string") {
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return defaultFilename;
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}
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if (isDataScheme(url)) {
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(0, _util.warn)('getPdfFilenameFromUrl: ignore "data:"-URL for performance reasons.');
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return defaultFilename;
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}
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const reURI = /^(?:(?:[^:]+:)?\/\/[^/]+)?([^?#]*)(\?[^#]*)?(#.*)?$/;
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const reFilename = /[^/?#=]+\.pdf\b(?!.*\.pdf\b)/i;
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const splitURI = reURI.exec(url);
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let suggestedFilename = reFilename.exec(splitURI[1]) || reFilename.exec(splitURI[2]) || reFilename.exec(splitURI[3]);
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if (suggestedFilename) {
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suggestedFilename = suggestedFilename[0];
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if (suggestedFilename.includes("%")) {
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try {
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suggestedFilename = reFilename.exec(decodeURIComponent(suggestedFilename))[0];
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} catch (ex) {}
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}
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}
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return suggestedFilename || defaultFilename;
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}
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class StatTimer {
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constructor() {
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this.started = Object.create(null);
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this.times = [];
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}
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time(name) {
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if (name in this.started) {
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(0, _util.warn)(`Timer is already running for ${name}`);
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}
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this.started[name] = Date.now();
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}
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timeEnd(name) {
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if (!(name in this.started)) {
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(0, _util.warn)(`Timer has not been started for ${name}`);
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}
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this.times.push({
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name,
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start: this.started[name],
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end: Date.now()
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});
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delete this.started[name];
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}
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toString() {
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const outBuf = [];
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let longest = 0;
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for (const time of this.times) {
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const name = time.name;
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if (name.length > longest) {
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longest = name.length;
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}
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}
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for (const time of this.times) {
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const duration = time.end - time.start;
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outBuf.push(`${time.name.padEnd(longest)} ${duration}ms\n`);
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}
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return outBuf.join("");
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}
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}
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exports.StatTimer = StatTimer;
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function isValidFetchUrl(url, baseUrl) {
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try {
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const {
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protocol
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} = baseUrl ? new URL(url, baseUrl) : new URL(url);
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return protocol === "http:" || protocol === "https:";
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} catch (ex) {
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return false;
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}
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}
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function loadScript(src, removeScriptElement = false) {
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return new Promise((resolve, reject) => {
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const script = document.createElement("script");
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script.src = src;
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script.onload = function (evt) {
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if (removeScriptElement) {
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script.remove();
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}
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resolve(evt);
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};
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script.onerror = function () {
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reject(new Error(`Cannot load script at: ${script.src}`));
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};
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(document.head || document.documentElement).append(script);
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});
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}
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function deprecated(details) {
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console.log("Deprecated API usage: " + details);
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}
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let pdfDateStringRegex;
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class PDFDateString {
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static toDateObject(input) {
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if (!input || typeof input !== "string") {
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return null;
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}
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if (!pdfDateStringRegex) {
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pdfDateStringRegex = new RegExp("^D:" + "(\\d{4})" + "(\\d{2})?" + "(\\d{2})?" + "(\\d{2})?" + "(\\d{2})?" + "(\\d{2})?" + "([Z|+|-])?" + "(\\d{2})?" + "'?" + "(\\d{2})?" + "'?");
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}
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const matches = pdfDateStringRegex.exec(input);
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if (!matches) {
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return null;
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}
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const year = parseInt(matches[1], 10);
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let month = parseInt(matches[2], 10);
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month = month >= 1 && month <= 12 ? month - 1 : 0;
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let day = parseInt(matches[3], 10);
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day = day >= 1 && day <= 31 ? day : 1;
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let hour = parseInt(matches[4], 10);
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hour = hour >= 0 && hour <= 23 ? hour : 0;
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let minute = parseInt(matches[5], 10);
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minute = minute >= 0 && minute <= 59 ? minute : 0;
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let second = parseInt(matches[6], 10);
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second = second >= 0 && second <= 59 ? second : 0;
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const universalTimeRelation = matches[7] || "Z";
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let offsetHour = parseInt(matches[8], 10);
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offsetHour = offsetHour >= 0 && offsetHour <= 23 ? offsetHour : 0;
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let offsetMinute = parseInt(matches[9], 10) || 0;
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offsetMinute = offsetMinute >= 0 && offsetMinute <= 59 ? offsetMinute : 0;
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if (universalTimeRelation === "-") {
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hour += offsetHour;
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minute += offsetMinute;
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} else if (universalTimeRelation === "+") {
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hour -= offsetHour;
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minute -= offsetMinute;
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}
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return new Date(Date.UTC(year, month, day, hour, minute, second));
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}
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}
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exports.PDFDateString = PDFDateString;
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function getXfaPageViewport(xfaPage, {
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scale = 1,
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rotation = 0
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}) {
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const {
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width,
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height
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} = xfaPage.attributes.style;
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const viewBox = [0, 0, parseInt(width), parseInt(height)];
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return new PageViewport({
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viewBox,
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scale,
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rotation
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});
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}
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function getRGB(color) {
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if (color.startsWith("#")) {
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const colorRGB = parseInt(color.slice(1), 16);
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return [(colorRGB & 0xff0000) >> 16, (colorRGB & 0x00ff00) >> 8, colorRGB & 0x0000ff];
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}
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if (color.startsWith("rgb(")) {
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return color.slice(4, -1).split(",").map(x => parseInt(x));
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}
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if (color.startsWith("rgba(")) {
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return color.slice(5, -1).split(",").map(x => parseInt(x)).slice(0, 3);
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}
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(0, _util.warn)(`Not a valid color format: "${color}"`);
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return [0, 0, 0];
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}
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function getColorValues(colors) {
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const span = document.createElement("span");
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span.style.visibility = "hidden";
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document.body.append(span);
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for (const name of colors.keys()) {
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span.style.color = name;
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const computedColor = window.getComputedStyle(span).color;
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colors.set(name, getRGB(computedColor));
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}
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span.remove();
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}
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function getCurrentTransform(ctx) {
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const {
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a,
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b,
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c,
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d,
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e,
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f
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} = ctx.getTransform();
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return [a, b, c, d, e, f];
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}
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function getCurrentTransformInverse(ctx) {
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const {
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a,
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b,
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c,
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d,
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e,
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f
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} = ctx.getTransform().invertSelf();
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return [a, b, c, d, e, f];
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} |