pdf-circus source code #8

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1. celsowm commented on Jul 5, 2019

   

   celsowm

   on Jul 5, 2019

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   such a pity there is not a simple example of "how to join pdfs" on pdfassembler :(
2. Dinibewerbig commented on Jul 6, 2019

   

   Dinibewerbig

   on Jul 6, 2019

   Last edited by Dinibewerbig

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   Why can't you upload pdf-circus source code (at least the split-join page) to github so I can get a glimpse at your code to get a better idea of how you did it?
3. celsowm commented on Jul 6, 2019

   

   celsowm

   on Jul 6, 2019

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   For those who want (at least) the merge functionality:

   function pdfMerge(urls, divRootId) {
       //necessário pois para manter as promisses sincronizadas com await
       (async function loop() {
           for (url_item of urls) {
               console.log("loading: " + url_item);
               var loadingTask = pdfjsLib.getDocument(url_item);
               //sem isso fica dessincronizado
               await loadingTask.promise.then(function (pdf) {
                   pdf.getMetadata().then(function (metaData) {
                       console.log("pdf (" + urls + ") version: " + metaData.info.PDFFormatVersion); //versão do pdf
                   }).catch(function (err) {
                       console.log('Error getting meta data');
                       console.log(err);
                   });
                   console.log("páginas: " + pdf.numPages);
                   let i = 0;
                   while (i < pdf.numPages) {
                       var pageNumber = i;
                       pdf.getPage(pageNumber).then(function (page) {
                           var div = document.createElement("div");
                           var documentosDiv = document.querySelector('#' + divRootId);
                           documentosDiv.appendChild(div);
                           var canvas = document.createElement("canvas");
                           div.appendChild(canvas);
                           // Prepare canvas using PDF page dimensions
                           var viewport = page.getViewport({scale: 1, });
                           //var canvas = document.getElementById('the-canvas');
                           var context = canvas.getContext('2d');
                           canvas.height = viewport.height;
                           canvas.width = viewport.width;
                           // Render PDF page into canvas context
                           var renderContext = {
                               canvasContext: context,
                               viewport: viewport
                           };
                           var renderTask = page.render(renderContext);
                           renderTask.promise.then(function () {
                               console.log('Page rendered');
                           });
                       });
                       i++;
                   }
                   // Fetch the first page
               }, function (reason) {
                   // PDF loading error
                   console.error(reason);
               });
           }
       })();
   }
   
   
4. Dinibewerbig commented on Jul 6, 2019

   

   Dinibewerbig

   on Jul 6, 2019

   Last edited by Dinibewerbig

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   Thank you! Very kind. God bless you!
   Muito Brigado!
5. celsowm commented on Jul 6, 2019

   

   celsowm

   on Jul 6, 2019

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   You are welcome @Dinibewerbig !
   Do not forget to include pdfjs-dist (.js and .maps) in your project ! It works smooth even without NodeJS !