From 77a58849e80ecf347aa1b9895f8451a484329a2c Mon Sep 17 00:00:00 2001
From: Wouter R <gennerate@zonnet.nl>
Date: Wed, 23 Oct 2013 01:29:50 +0200
Subject: [PATCH] Load sketch path from svg (WIP, metadata is not parsed yet).

---
 js_src/buttonbehaviors.js | 32 ++++++++++++--
 js_src/canvasDrawing.js   | 91 +++++++++++++++++++++++++++++++++++----
 www/index.html            |  4 ++
 3 files changed, 115 insertions(+), 12 deletions(-)

diff --git a/js_src/buttonbehaviors.js b/js_src/buttonbehaviors.js
index eb7db6b..fc4195e 100644
--- a/js_src/buttonbehaviors.js
+++ b/js_src/buttonbehaviors.js
@@ -188,6 +188,31 @@ function initButtonBehavior() {
 
   //btnStop.on('touchstart mousedown',stopPrint);
 
+  	var btnLoadSketch = $('#btnLoadSketch');
+  	btnLoadSketch.mouseup(function(e) {
+  		var sketchId = $('#sketchId').val();
+  		console.log("loading sketch with id " + sketchId);
+
+		wifiboxURL = "http://192.168.5.1/d3dapi";
+		$.ajax({
+			url: wifiboxURL + "/sketch/" + sketchId,
+			dataType: 'json',
+			type: 'GET',
+			//timeout: this.timeoutTime,
+			success: function(response) {
+				if (response.status == 'error' || response.status == 'fail') {
+					console.log("loadSketch fail/error: " + response.msg + " -- ", response);
+				} else {
+					console.log("loadSketch success: loaded id #" + response.data.id, response);
+					//console.log("sketch content:\n" + response.data.data);
+					loadFromSvg(response.data.data);
+				}
+			}
+		}).fail(function() {
+			console.log("loadSketch failed: ", response);
+		});
+  	});
+
 	btnSave.mouseup(function(e) {
 		svg = saveToSvg();
 		console.log("generated SVG [" + _points.length + " points, " + svg.length + " bytes]:\n" + svg);
@@ -200,10 +225,11 @@ function initButtonBehavior() {
 			data: { data: svg },
 			//timeout: this.timeoutTime,
 			success: function(response) {
-				if (response.status == 'error' || response.status == 'fail')
-					console.log("saveSketch fail/error: ", response);
-				else
+				if (response.status == 'error' || response.status == 'fail') {
+					console.log("saveSketch fail/error: " + response.msg + " -- ", response);
+				} else {
 					console.log("saveSketch success: saved with id #" + response.data.id, response);
+				}
 			}
 		}).fail(function() {
 			console.log("saveSketch failed: ", response);
diff --git a/js_src/canvasDrawing.js b/js_src/canvasDrawing.js
index c750947..62e9222 100644
--- a/js_src/canvasDrawing.js
+++ b/js_src/canvasDrawing.js
@@ -300,6 +300,86 @@ function onCanvasMouseDown(e) {
   draw(x, y, 0.5);
 }
 
+function loadFromSvg(svgData) {
+	var mode = '', x = 0, y = 0;
+
+	console.log("loading " + svgData.length + " bytes of data...");
+
+	clearDoodle();
+
+	var p = svgData.indexOf("<path");
+	if (p == -1) { console.log("loadFromSvg: could not find parsing start point"); return false; }
+	p = svgData.indexOf('d="', p);
+	if (p == -1) { console.log("loadFromSvg: could not find parsing start point"); return false; }
+	p += 3; //skip 'd="'
+
+	var skipSpace = function() { while (svgData.charAt(p) == ' ') p++; }
+	var parseCommand = function() {
+		while (true) {
+			skipSpace();
+			var c = svgData.charAt(p);
+			if (c == 'M' || c == 'm' || c == 'l') { //new command letter
+				mode = c;
+			} else if (c == '"') { //end of command chain
+				return true;
+			} else { //something else, must be a pair of coordinates...
+				var tx = 0, ty = 0, numberEnd = 0, len = 0;
+				numberEnd = svgData.indexOf(',', p);
+				if (numberEnd == -1) { console.log("could not find comma in coordinate pair"); return false; }
+				len = numberEnd - p;
+				tx = parseInt(svgData.substr(p, len));
+				p += len + 1;
+				skipSpace();
+				numberEnd = svgData.indexOf(' ', p);
+				if (numberEnd == -1) { console.log("could not find space after coordinate pair"); return false; }
+				len = numberEnd - p;
+				ty = parseInt(svgData.substr(p, len));
+				p += len;
+
+				if (mode == 'M' || mode == 'L') {
+					x = tx; y = ty;
+				} else if (mode == 'm' || mode == 'l') {
+					x += tx; y += ty;
+				} else {
+					console.log("loadFromSvg: found coordinate pair but mode was never set");
+					return false;
+				}
+
+				var isMove = mode == 'm' || mode == 'M';
+
+				//TODO: create function for adding a point?
+				//console.log("inserting "+x+","+y+" ",isMove);
+				updatePrevX = x;
+				updatePrevY = y;
+				_points.push([x, y, isMove]);
+				adjustBounds(x, y);
+				adjustPreviewTransformation();
+
+				if (isMove) draw(x, y, .5);
+				else draw(x, y);
+			}
+			p++;
+		}
+
+		return true;
+	};
+
+	parseCommand(); //depends on value of p, so don't move this without taking that into consideration
+
+	//find <!--d3d-keys
+	//loop until invalid character found (namely the '-' of '-->'): skipSpace(); parse '(\w+):\w*(\w+)'; assign corresp. var if key matches
+
+	renderToImageDataPreview();
+
+	/* TODO: behaviour for prev/next buttons:
+	 * - call update/status once to init number of saved sketches - 0 means both buttons disabled, otherwise set current to -1, total amount to number and enable left (i.e. clicking that loads last saved sketch)
+	 * - when going back and forth, update current and enable/disable both buttons when borders (i.e. 1 and total amount) are reached
+	 * - when saving, set current to -1 again and update total amount
+	 */
+
+	return true;
+}
+
 function saveToSvg() {
 	var lastX = 0, lastY = 0, lastIsMove;
 	var svg = '';
@@ -332,20 +412,13 @@ function saveToSvg() {
 	svg += '\t<path transform="translate(' + -doodleBounds[0] + ',' + -doodleBounds[1] + ')" d="' + data + '" fill="none" stroke="black" stroke-width="2" />\n';
 
 	var makeField = function(k,v) { return k + ': ' + v + '; '; }
-	svg += '<!-- ' + makeField('height', numLayers) + makeField('outlineShape', VERTICALSHAPE) + makeField('twist', rStep) + '-->\n';
+	svg += '<!--d3d-keys ' + makeField('height', numLayers) + makeField('outlineShape', VERTICALSHAPE) + makeField('twist', rStep) + '-->\n';
 
 	svg += '</svg>\n';
 
 	return svg;
 }
 
-function loadFromSvg(svgData) {
-	//clear out points
-	//read svg and fill points (and update bounds)
-	//NOTE: generate the fields comment with some magic value so we can easily detect this while parsing
-	//update any state necessary to have the canvas/client re-init itself to the new data
-}
-
 var prevPoint = {x:-1, y:-1};
 function onCanvasMouseMove(e) {
 //  console.log("f:onCanvasMouseMove()");
@@ -527,4 +600,4 @@ function onCanvasTouchEnd(e) {
 
 function prevent(e) {
   e.preventDefault();
-}
\ No newline at end of file
+}
diff --git a/www/index.html b/www/index.html
index c33f0bb..6d7337e 100644
--- a/www/index.html
+++ b/www/index.html
@@ -110,6 +110,10 @@
   <div id="debug_textArea">
     <textarea rows="5" cols="60" id="textdump"></textarea>
   </div>
+  <div id="sketchLoader" style="position: absolute; display: block; text-align: left; margin-left: 12em; z-index: 501;">
+  	<input type="text" id="sketchId" value="0" style="width: 4em;" />
+  	<span id="btnLoadSketch">load sketch</span>
+  </div>
   <div id="debug_display">
   </div>
   <div id="contentOverlay">