aemarkov/Android-pdf.js changes

## Android-pdf.js changes
# customview.js


  // NOTE:
    // Modifying the URL below to another server will likely *NOT* work. Because of browser
    // security restrictions, we have to use a file server with special headers
    // (CORS) - most servers don't support cross-origin browser requests.
    //

    //
    // Disable workers to avoid yet another cross-origin issue (workers need the URL of
    // the script to be loaded, and currently do not allow cross-origin scripts)
    //
PDFJS.disableWorker = false;

var pdfDoc = null,
  pageNum = 1,
  pageRendering = false,
  pageNumPending = null,
  scale = 1.0,
  numPages = 1;
  //canvas = document.getElementById('the-canvas')


show_pdf('1.pdf');

//Передача файла в виде base64 (не используется, и так работает)
function show_pdf_base64(base64)
{
  alert('DECODING BASE64...');
  data = fromBase64(base64);
  alert('DECODED');
  PDFJS.getDocument(data).then(getPdf);
}

function fromBase64(dataURI) {
    var raw = window.atob(dataURI);
    var rawLength = raw.length;
    var array = new Uint8Array(new ArrayBuffer(rawLength));

    for(i = 0; i < rawLength; i++) {
         array[i] = raw.charCodeAt(i);
    }
    return array;
}

//Передача файла в виде полного имени (работает)
function show_pdf(url)
{
  PDFJS.getDocument(url).then(getPdf);
}


//Рендер пдф
function getPdf(pdfDoc_)
{
  pdfDoc = pdfDoc_;
  numPages =  pdfDoc.numPages;
  pageNum=1;
  pdfDoc.getPage(pageNum).then(handlePages);
}

//Рендер страницы
function handlePages(page)
{
  //create new canvas
  var viewport = page.getViewport(1);
  var canvas = document.createElement( "canvas" );
  canvas.style.display="block";

  var context = canvas.getContext('2d');
  canvas.height = viewport.height;
  canvas.width = viewport.width;

  //render page
  page.render({canvasContext: context, viewport: viewport});

  //add canvas to body
  document.body.appendChild(canvas);

  //render new page
  pageNum++;
  if(pdfDoc!=null && pageNum<=numPages)
    pdfDoc.getPage(pageNum).then(handlePages);
}

# html
<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" href="minimal.css"/>
  <script type="text/javascript" src="file:///android_asset/pdfviewer/compatibility.js"></script>
  <script type="text/javascript" src="file:///android_asset/pdfviewer/pdf.js"></script>
  <script type="text/javascript" src="file:///android_asset/pdfviewer/customview.js"></script>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">

</head>
<body>
</body>
</html>

#java
 webView.setWebChromeClient(new WebChromeClient());
            final Uri path = Uri.fromFile(pdf_file);

            //Обработчик событий WebView
            webView.setWebViewClient(new WebViewClient(){
                public void onPageFinished(WebView view, String url) {

                    String call = "show_pdf('"+path.toString()+"');";
                    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
                        webView.evaluateJavascript(call, null);
                    }
                    else
                        webView.loadUrl("javascript:"+call);
                }
            });

            webView.loadUrl("file:///android_asset/pdfviewer/index.html");
	# customview.js


	// NOTE:
	// Modifying the URL below to another server will likely NOT work. Because of browser
	// security restrictions, we have to use a file server with special headers
	// (CORS) - most servers don't support cross-origin browser requests.
	//

	//
	// Disable workers to avoid yet another cross-origin issue (workers need the URL of
	// the script to be loaded, and currently do not allow cross-origin scripts)
	//
	PDFJS.disableWorker = false;

	var pdfDoc = null,
	pageNum = 1,
	pageRendering = false,
	pageNumPending = null,
	scale = 1.0,
	numPages = 1;
	//canvas = document.getElementById('the-canvas')


	show_pdf('1.pdf');

	//Передача файла в виде base64 (не используется, и так работает)
	function show_pdf_base64(base64)
	{
	alert('DECODING BASE64...');
	data = fromBase64(base64);
	alert('DECODED');
	PDFJS.getDocument(data).then(getPdf);
	}

	function fromBase64(dataURI) {
	var raw = window.atob(dataURI);
	var rawLength = raw.length;
	var array = new Uint8Array(new ArrayBuffer(rawLength));

	for(i = 0; i < rawLength; i++) {
	array[i] = raw.charCodeAt(i);
	}
	return array;
	}

	//Передача файла в виде полного имени (работает)
	function show_pdf(url)
	{
	PDFJS.getDocument(url).then(getPdf);
	}


	//Рендер пдф
	function getPdf(pdfDoc_)
	{
	pdfDoc = pdfDoc_;
	numPages = pdfDoc.numPages;
	pageNum=1;
	pdfDoc.getPage(pageNum).then(handlePages);
	}

	//Рендер страницы
	function handlePages(page)
	{
	//create new canvas
	var viewport = page.getViewport(1);
	var canvas = document.createElement( "canvas" );
	canvas.style.display="block";

	var context = canvas.getContext('2d');
	canvas.height = viewport.height;
	canvas.width = viewport.width;

	//render page
	page.render({canvasContext: context, viewport: viewport});

	//add canvas to body
	document.body.appendChild(canvas);

	//render new page
	pageNum++;
	if(pdfDoc!=null && pageNum<=numPages)
	pdfDoc.getPage(pageNum).then(handlePages);
	}

	# html
	<!DOCTYPE html>
	<html>
	<head>
	<link rel="stylesheet" href="minimal.css"/>
	<script type="text/javascript" src="file:///android_asset/pdfviewer/compatibility.js"></script>
	<script type="text/javascript" src="file:///android_asset/pdfviewer/pdf.js"></script>
	<script type="text/javascript" src="file:///android_asset/pdfviewer/customview.js"></script>
	<meta name="viewport" content="width=device-width, initial-scale=1.0">

	</head>
	<body>
	</body>
	</html>

	#java
	webView.setWebChromeClient(new WebChromeClient());
	final Uri path = Uri.fromFile(pdf_file);

	//Обработчик событий WebView
	webView.setWebViewClient(new WebViewClient(){
	public void onPageFinished(WebView view, String url) {

	String call = "show_pdf('"+path.toString()+"');";
	if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
	webView.evaluateJavascript(call, null);
	}
	else
	webView.loadUrl("javascript:"+call);
	}
	});

	webView.loadUrl("file:///android_asset/pdfviewer/index.html");
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