ElementEdit

1//---------------------------------------------------------------------------------------
2// Copyright (c) 2001-2023 by Apryse Software Inc. All Rights Reserved.
3// Consult legal.txt regarding legal and license information.
4//---------------------------------------------------------------------------------------
5
6(exports => {
7
8
9
10
11
12
13
14  exports.runElementEditTest = () => {
15    const PDFNet = exports.Core.PDFNet;
16
17    async function ProcessElements(reader, writer, visited) {
18      await PDFNet.startDeallocateStack();
19      const colorspace = await PDFNet.ColorSpace.createDeviceRGB();
20      const redColor = await PDFNet.ColorPt.init(1, 0, 0, 0);
21      const blueColor = await PDFNet.ColorPt.init(0, 0, 1, 0);
22
23      for (let element = await reader.next(); element !== null; element = await reader.next()) {
24        const elementType = await element.getType();
25        let gs;
26        let formObj;
27        let formObjNum = null;
28        switch (elementType) {
29          case PDFNet.Element.Type.e_image:
30          case PDFNet.Element.Type.e_inline_image:
31            // remove all images by skipping them
32            break;
33          case PDFNet.Element.Type.e_path:
34            // Set all paths to red
35            gs = await element.getGState();
36            gs.setFillColorSpace(colorspace);
37            gs.setFillColorWithColorPt(redColor);
38            writer.writeElement(element);
39            break;
40          case PDFNet.Element.Type.e_text:
41            // Set all text to blue
42            gs = await element.getGState();
43            gs.setFillColorSpace(colorspace);
44            gs.setFillColorWithColorPt(blueColor);
45            writer.writeElement(element);
46            break;
47          case PDFNet.Element.Type.e_form:
48            writer.writeElement(element);
49            formObj = await element.getXObject();
50            formObjNum = formObj.getObjNum();
51            // if XObject not yet processed
52            if (visited.indexOf(formObjNum) === -1) {
53              // Set Replacement
54              const insertedObj = await formObj.getObjNum();
55              if (!visited.includes(insertedObj)) {
56                visited.push(insertedObj);
57              }
58              const newWriter = await PDFNet.ElementWriter.create();
59              reader.formBegin();
60              newWriter.beginOnObj(formObj, true);
61              await ProcessElements(reader, newWriter, visited);
62              newWriter.end();
63              reader.end();
64            }
65            break;
66          default:
67            writer.writeElement(element);
68        }
69      }
70      await PDFNet.endDeallocateStack();
71    }
72
73    const main = async () => {
74      console.log('Beginning Test');
75      const ret = 0;
76      // Relative path to the folder containing test files.
77      const inputUrl = '../TestFiles/';
78      const doc = await PDFNet.PDFDoc.createFromURL(inputUrl + 'newsletter.pdf');
79      doc.initSecurityHandler();
80      doc.lock();
81
82      console.log('PDF document initialized and locked');
83      const writer = await PDFNet.ElementWriter.create();
84      const reader = await PDFNet.ElementReader.create();
85      const visited = [];
86
87      const totalPageNumber = await doc.getPageCount();
88
89      const itr = await doc.getPageIterator(1);
90
91      // Read every page
92      for (itr; await itr.hasNext(); itr.next()) {
93        const page = await itr.current();
94        const currentPageNumber = await page.getIndex();
95        console.log('Processing elements on page ' + currentPageNumber + '/' + totalPageNumber);
96        const sdfObj = await page.getSDFObj();
97        // Set Replacement
98        const insertedObj = await sdfObj.getObjNum();
99        if (!visited.includes(insertedObj)) {
100          visited.push(insertedObj);
101        }
102        reader.beginOnPage(page);
103        writer.beginOnPage(page, PDFNet.ElementWriter.WriteMode.e_replacement, false);
104        await ProcessElements(reader, writer, visited);
105        writer.end();
106        reader.end();
107      }
108
109      const docBuffer = await doc.saveMemoryBuffer(PDFNet.SDFDoc.SaveOptions.e_remove_unused);
110      saveBufferAsPDFDoc(docBuffer, 'newsletter_edited.pdf');
111      console.log('Done.');
112      return ret;
113    };
114
115    // add your own license key as the second parameter, e.g. PDFNet.runWithCleanup(main, 'YOUR_LICENSE_KEY')
116    PDFNet.runWithCleanup(main);
117  };
118})(window);
119// eslint-disable-next-line spaced-comment
120//# sourceURL=ElementEditTest.js