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Diffstat (limited to 'dist/js/pdf-view.js')
-rw-r--r-- | dist/js/pdf-view.js | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/dist/js/pdf-view.js b/dist/js/pdf-view.js deleted file mode 100644 index 8a4b6cfc..00000000 --- a/dist/js/pdf-view.js +++ /dev/null @@ -1,108 +0,0 @@ -/** This code is under the Apache License Version 2.0, January 2004 - * http://www.apache.org/licenses/, as it is heavily based on - * documentation of pdf.js (which is under Apache License v2.0) - */ - -PDFJS.workerSrc = '/dist/js/pdf.worker.min.js'; - -var url = '/presentations/investors2018.pdf'; - -var pdfDoc = null, - pageNum = 1, - pageRendering = false, - pageNumPending = null, - scale = 1, - canvasLeft = document.getElementById('the-canvas-left'), - canvasRight = document.getElementById('the-canvas-right'); - -/** - * Get page info from document, resize canvas accordingly, and render page. - * @param num Page number. - */ -function renderPage(canvas,num) { - pageRendering = true; - // Using promise to fetch the page - pdfDoc.getPage(num).then(function(page) { - var viewport = page.getViewport(scale); - canvas.height = viewport.height; - canvas.width = viewport.width; - - // Render PDF page into canvas context - var renderContext = { - canvasContext: canvas.getContext('2d'), - viewport: viewport - }; - var renderTask = page.render(renderContext); - - // Wait for rendering to finish - renderTask.promise.then(function() { - pageRendering = false; - if (pageNumPending !== null) { - // New page rendering is pending - renderPage(pageNumPending); - pageNumPending = null; - } - }); - }); -} - -/** - * If another page rendering in progress, waits until the rendering is - * finised. Otherwise, executes rendering immediately. - */ -function queueRenderPage(num) { - if (pageRendering) { - pageNumPending = num; - } else { - renderPage(canvasLeft,num); - renderPage(canvasRight,num+1); - } -} - -/** - * Displays previous page. - */ -function onPrevPage(event) { - event.preventDefault(); - if (pageNum <= 1) { - return; - } - pageNum--; - queueRenderPage(pageNum); -} -document.getElementById('canvas-left').addEventListener('click', onPrevPage); - -/** - * Displays next page. - */ -function onNextPage(event) { - event.preventDefault(); - if (pageNum >= pdfDoc.numPages - 1) { - return; - } - pageNum++; - queueRenderPage(pageNum); -} -document.getElementById('canvas-right').addEventListener('click', onNextPage); - -document.getElementById('canvas-left').style.display = 'block'; -document.getElementById('canvas-right').style.display = 'block'; - - -function onMouseDown(event) { - event.preventDefault(); -} - -document.getElementById('canvas-left').addEventListener('mousedown', onMouseDown); -document.getElementById('canvas-right').addEventListener('mousedown', onMouseDown); - -/** - * Asynchronously downloads PDF. - */ -PDFJS.getDocument(url).then(function(pdfDoc_) { - pdfDoc = pdfDoc_; - - // Initial/first page rendering - renderPage(canvasLeft,pageNum); - renderPage(canvasRight,pageNum + 1); -}); |