From cb3c726d400e19fba8a2544e8e1decbd6e8eb368 Mon Sep 17 00:00:00 2001
From: Thomas Felber <felber@student.tugraz.at>
Date: Sat, 20 Jun 2015 18:17:06 -1000
Subject: Improved Signature Placement, Removed unneeded pdf.js UI elements,
 enabled possibility to sign with server keystore, added possibility to sign
 pdfs (give as url) by calling pdf.js with appropriate request parameters

---
 .../src/main/webapp/assets/js/pdf.js/web/app.js    | 134 +++++++++++++++------
 1 file changed, 98 insertions(+), 36 deletions(-)

(limited to 'pdf-as-web/src/main/webapp/assets/js/pdf.js/web/app.js')

diff --git a/pdf-as-web/src/main/webapp/assets/js/pdf.js/web/app.js b/pdf-as-web/src/main/webapp/assets/js/pdf.js/web/app.js
index bb2c89d7..c2173efb 100644
--- a/pdf-as-web/src/main/webapp/assets/js/pdf.js/web/app.js
+++ b/pdf-as-web/src/main/webapp/assets/js/pdf.js/web/app.js
@@ -1,52 +1,114 @@
-window.addEventListener("message", function (evt) {
-	var goto_last_page_on_render = false;
+
+function setFileForParent(file) {
+	console.log("SettingFileFOrparent");
+	if (window.self != window.parent) {
+		window.parent.file = file;
+	}
+}
+
+window.addEventListener("message", handlePostMessage, false);
+
+function handlePostMessage(evt) {
 	var file = evt.data;
+	console.log(file)
+	var signature_placed_manually = false;
 	var fileReader = new FileReader();
-	var current_page = null;
-	console.log("child:" + file);
-	
-	function rendered(evt) {
-		console.log(evt);
-		if(goto_last_page_on_render) {
-			document.getElementById("lastPage").click();
-			return;
-		}
-		showSignatureBlock();
-		console.log(evt);
-		current_page = PDFView.page;
-		document.removeEventListener('textlayerrendered', rendered);
-		document.addEventListener('textlayerrendered', showSignatureBlock);
-	}
 	
-	window.addEventListener('pagechange', showSignatureBlock);
-	document.addEventListener('textlayerrendered', rendered);
-
 	fileReader.onload = function(evt) {
 		var buffer = evt.target.result;
 		var uint8Array = new Uint8Array(buffer);
 		PDFView.open(uint8Array, 0);
+		$("#placeSignature").bind("click", placeSignature);
+		$("#secondaryPlaceSignature").bind("click", placeSignature);
+		$("#delSignature").bind("click", removeSignature);
+		$("#secondaryDelSignature").bind("click", removeSignature);
 	};
 	
-	function showSignatureBlock(evt) {
-		console.log(evt);
-		if(PDFViewerApplication.pdfViewer.getPageView(PDFViewerApplication.page - 1).renderingState === RenderingStates.RUNNING) {
-			return;
+	fileReader.readAsArrayBuffer(file);
+}
+
+function isSignaturePlaced() {
+	var signature = $(".cl_signature");
+	if(signature.length > 0) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+function placeSignature(evt) {
+	var current_scale = PDFViewerApplication.pdfViewer.currentScale;
+	var sig_size = Math.floor(96 * current_scale);
+	var current_page = PDFView.page;
+	
+	if(isSignaturePlaced()) {
+		removeSignature();
+	} 
+	
+	$("#pageContainer"+current_page).prepend("<img src='http://localhost:8080/pdf-as-web/visblock?r=" + sig_size.toString() + "' data-pos-x='0' data-pos-y='0' data-page='" + current_page + "' alt='Signature' id='img_signature' class='cl_signature' draggable='true' style='position: absolute; z-index:4; cursor:move'>");
+	makeSignatureDraggable($(".cl_signature"));
+}
+
+function makeSignatureDraggable(signature) {
+	var current_page = PDFView.page;
+	var canvas_height = $("#page" + current_page.toString()).attr("height");
+	var current_scale = PDFViewerApplication.pdfViewer.currentScale;
+
+	signature.draggable({
+		drag: function() {
+			var $this = $(this);
+			var thisPos = $this.position({my: "left bottom"});
+			var parentPos = $this.parent().position();			
+			var x = thisPos.left - parentPos.left;
+			var y = thisPos.top - parentPos.top;
+			$(this).attr("data-pos-x", (Math.floor(x / current_scale / (4.0/3.0))).toString()); //width shrink again by 4/3?
+			$(this).attr("data-pos-y", Math.floor((parseInt(canvas_height) + parentPos.top - (thisPos.top + parentPos.top)) / current_scale / (4.0/3.0)).toString()); //height shrink again by 4/3?
+		},
+		containment: "parent"
+	});			
+}
+
+function removeSignature() {
+	if(isSignaturePlaced()) {
+		$(".cl_signature").remove();
+	}
+}
+
+$(document).ready(function() {
+	//http://localhost:8080/pdf-as-web/assets/js/pdf.js/web/viewer.html?connector=jks&pdfurl=http://www.example.net/pdf.pdf
+	$.urlParam = function(name){
+		var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
+		if(!results) {
+		   return null;
+		} else {
+		   return results[1] || 0;
 		}
-		
-		console.log(document.readyState);
-		$(".img_signature").remove();
-		$("#pageContainer"+PDFView.page).prepend("<img src='../../../img/signature.png' alt='Signature' id='img_signature' class='cl_signature' draggable='true' style='position: absolute; z-index:4;'>");
-		$(".cl_signature").draggable({
-			drag: function() {
-				
-			},
-			containment: "parent"
-		});
 	}
 	
-	fileReader.readAsArrayBuffer(file);
-}, false);
+	var connector = $.urlParam("connector");
+	var pdfurl = $.urlParam("pdfurl");
+	
+	if(!connector || !pdfurl) {
+		return;
+	} else {
+		var fd = new FormData();
+		fd.append("source", "internal");
+		fd.append("pdf-url", pdfurl);
+		fd.append("connector", connector);
 
+		$.ajax({
+			url: "http://localhost:8080/pdf-as-web/Sign",
+			data: fd,
+			processData: false,
+			contentType: false,
+			type: "POST",
+			success: function(response) {
+				$("html").empty();
+				$("html").html(response);
+			}
+		});
+	}
+});
 
 
 
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