AsposePdfReplaceTextEx

Replace multiple text fragments in a PDF-file with alignment control.

function AsposePdfReplaceTextEx(
    fileBlob,
    fileName,
    findReplaceSpec,
    options,
    fileNameResult
)

Parameters:

• fileBlob Blob object
• fileName file name
• findReplaceSpec Array, replacement specification:
  • Array of objects describing replacements:

    [
      { findText: "text1", replaceText: "value1" },
      { findText: "text2", replaceText: "value2" }
    ]
    

  • Each object must contain findText and replaceText string properties
• options object, settings for text replacement:
  • alignment (string), text alignment (e.g., “left”, “right”, “auto”)
    • When "auto" is used, text direction is detected automatically. Direction can also be explicitly forced by prefixing replaceText with special Unicode characters: \u200F (RTL) or \u200E (LTR), preferably as the first character
  • numPages (string|number|Array), target pages to process:
    • number, page number as 2
    • string, include page numbers with intervals as “7, 20, 22, 30-32, 33, 36-40, 46”
    • Array, array of page numbers, such as [1,3]
  • empty object {} for default behavior
• fileNameResult result file name

Return:

JSON object

• errorCode - code error (0 no error)
• errorText - text error ("" no error)
• fileNameResult - result file name

Web Worker example:

  /*Create Web Worker*/
  const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
  AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 'loaded!' :
      (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "application/pdf", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

  /*Event handler*/
  const ffileReplaceTextEx = e => {
    const file_reader = new FileReader();
    file_reader.onload = event => {
      const findReplaceSpec = [
            {
            findText: 'Aspose',
            replaceText: 'ASPOSE'
            },
            {
            findText: 'Node',
            replaceText: 'NODE'
            },
            {
            findText: 'ECMAScript',
            replaceText: '\u200FScript'
            }
      ];
      const optionsText = {numPages: 1, alignment: "auto"};
      /*Replace multiple text fragments in a PDF-file with alignment control and save the "ResultReplaceTextEx.pdf" - Ask Web Worker*/
      AsposePDFWebWorker.postMessage({ "operation": 'AsposePdfReplaceTextEx', "params": [event.target.result, e.target.files[0].name, findReplaceSpec, optionsText, "ResultReplaceTextEx.pdf"] }, [event.target.result]);
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

  /*Make a link to download the result file*/
  const DownloadFile = (filename, mime, content) => {
      mime = mime || "application/octet-stream";
      var link = document.createElement("a"); 
      link.href = URL.createObjectURL(new Blob([content], {type: mime}));
      link.download = filename;
      link.innerHTML = "Click here to download the file " + filename;
      document.body.appendChild(link); 
      document.body.appendChild(document.createElement("br"));
      return filename;
    }

Simple example:

  var ffileReplaceTextEx = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*RReplace multiple text fragments in a PDF-file with alignment control and save the "ResultReplaceTextEx.pdf"*/
      const json = AsposePdfReplaceTextEx(event.target.result, e.target.files[0].name, [{findText: 'Aspose',replaceText: 'ASPOSE'}], {alignment: "left"}, "ResultReplaceTextEx.pdf");
      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult
      else document.getElementById('output').textContent = json.errorText;
      /*Make a link to download the result file*/
      DownloadFile(json.fileNameResult, "application/pdf");
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };