From 3ae4f4343bd5b406604342596f54c7bfaa77f68c Mon Sep 17 00:00:00 2001
From: Will Bradley <bradley.will@gmail.com>
Date: Sun, 28 Jul 2013 19:34:21 -0400
Subject: [PATCH] Trying to resize map using transforms

---
 index.html |  4 +--
 print.html | 88 +++++++++++++++++++++++++++++++++++-------------------
 2 files changed, 60 insertions(+), 32 deletions(-)
diff --git a/index.html b/index.html
index b5cd542..3f31c48 100644
--- a/index.html
+++ b/index.html
@@ -6,8 +6,8 @@
   <![endif]-->
   <style type="text/css">
     #map { 
-    	height: 600px; 
-    	width: 80%;
+    	height: 612px; /* 8.5 inch at 72 dpi */
+    	width: 792px; /* 11 inch at 72 dpi */
     }
     #results { 
     	width: 18%;
diff --git a/print.html b/print.html
index 9cf25e4..0a91e97 100644
--- a/print.html
+++ b/print.html
@@ -9,6 +9,12 @@
 	  	padding: 0;
 	  	margin: 0;
 	  }
+	  #printbutton {
+	  	position: absolute;
+	  	top: 0;
+	  	left: 0;
+	  	z-index: 999;
+	  }
     #map { 
     	height: 2550px; /* 8.5 inch at 300 dpi */
     	width: 3300px;  /* 11 inch at 300 dpi */
@@ -19,6 +25,9 @@
 			size: 11in 8.5in; 
 		  margin: 0mm; 
 		}
+	  #printbutton {
+	  	display: none;
+	  }
     htmlff,boffdy { 
     	height: 8.5in; 
     	width: 11in; 
@@ -34,6 +43,7 @@
 
 </head>
 <body>
+	<input type="button" value="Print" id="printbutton" onclick="printMap()" />
   <div id="map"></div>	
 
   <script type="text/javascript">
@@ -58,8 +68,6 @@
 		if(params["q"] && params["b0"] && params["b1"] && params["b2"] && params["b3"]){
 			updateMap(decodeURIComponent(params["q"]),[[decodeURIComponent(params["b0"]), decodeURIComponent(params["b1"])],
 				  [decodeURIComponent(params["b2"]), decodeURIComponent(params["b3"])]]);
-			//uploadCanvas();
-			//print();
 		}
 		else {
 			alert("No boundaries given!");
@@ -71,38 +79,58 @@
 			map.fitBounds(bounds);
 		};
 
-		function uploadCanvas(){
-			var data = "<svg xmlns='http://www.w3.org/2000/svg' width='3300' height='2550'>" +
-			             "<foreignObject width='100%' height='100%'>" +
-			               "<div xmlns='http://www.w3.org/1999/xhtml' >" +
-			                  document.getElementById("map").innerHTML+
-			               "</div>" +
-			             "</foreignObject>" +
-			           "</svg>";
-			document.getElementById("map").innerHTML = data;
+		function printMap(){
+			halveMap();
+			print();
 		}
 
-		function drawCanvas(){
-			var canvas = document.getElementById("canvas");
-			var ctx = canvas.getContext("2d");
-			var data = "<svg xmlns='http://www.w3.org/2000/svg' width='3300' height='2550'>" +
-			             "<foreignObject width='100%' height='100%'>" +
-			               "<div xmlns='http://www.w3.org/1999/xhtml' >" +
-			                  document.getElementById("map").innerHTML+
-			               "</div>" +
-			             "</foreignObject>" +
-			           "</svg>";
-			var DOMURL = self.URL || self.webkitURL || self;
-			var img = new Image();
-			var svg = new Blob([data], {type: "image/svg+xml;charset=utf-8"});
-			var url = DOMURL.createObjectURL(svg);
-			img.onload = function() {
-			    ctx.drawImage(img, 0, 0);
-			    DOMURL.revokeObjectURL(url);
-			};
-			img.src = url;
+		
+		function halveMap(){
+			// Halve size of each leaflet tile AND decrease its offsets by half
+			var leaflets = document.getElementsByClassName("leaflet-tile");
+			for(var i=0; i < leaflets.length; i++){
+			  element = leaflets[i];
+			  element.style.width = element.style.width.split("px")[0]/2+"px";
+			  element.style.height = element.style.height.split("px")[0]/2+"px";
+
+			  computedStyle = window.getComputedStyle(element, null); // "null" means this is not a pesudo style.
+			  // You can retrieve the CSS3 matrix string by the following method.
+			  var matrix = computedStyle.getPropertyValue('transform')
+			    || computedStyle.getPropertyValue('-moz-transform')
+			    || computedStyle.getPropertyValue('-webkit-transform')
+			    || computedStyle.getPropertyValue('-ms-transform')
+			    || computedStyle.getPropertyValue('-o-transform');
+
+			  // Parse this string to obtain different attributes of the matrix.
+			  // This regexp matches anything looks like this: anything(1, 2, 3, 4, 5, 6);
+			  // Hence it matches both matrix strings:
+			  // 2d: matrix(1,2,3,4,5,6)
+			  // 3d: matrix3d(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16);
+			  var matrixPattern = /^\w*\((((\d+)|(\d*\.\d+)|(\-\d*)),\s*)*((\d+)|(\d*\.\d+)|(\-\d*))\)/i;
+			  var matrixValue = [];
+			  if (matrixPattern.test(matrix)) { // When it satisfy the pattern.
+			      console.log(matrix);
+			      var matrixCopy = matrix.replace(/^\w*\(/, '').replace(')', '');
+			      console.log(matrixCopy);
+			      m = matrixCopy.split(/\s*,\s*/);
+			      console.log(m);
+			      m[4] = m[4]/2;
+			      m[5] = m[5]/2;
+			      console.log(m);
+			      element.style.webkitTransform = "matrix("+m[0]+", "+m[1]+", "+m[2]+", "+m[3]+", "+m[4]+", "+m[5]+")";
+			      console.log(element.style.webkitTransform);
+			  }
+			}
+
+			// Halve size of map container (hopefully no redraw!)
+
+		  map._container.style.width = window.getComputedStyle(map._container, null).width.split("px")[0]/2+"px";
+		  map._container.style.height = window.getComputedStyle(map._container, null).height.split("px")[0]/2+"px";
+
 		}
 
+
+
   </script>
 
 
