Unpollute JavaScript global namespace

As these variables were being assigned without being explicitly
declared, they were implicitly added to the global namespace.

This commit removes 59 variables from the global namespace.

common/lib/xmodule/xmodule/js/src/capa/schematic.js

@@ -12,31 +12,30 @@
 // for modified nodal analysis (MNA) stamps see
 // http://www.analog-electronics.eu/analog-electronics/modified-nodal-analysis/modified-nodal-analysis.xhtml
 
-cktsim = (function() {
-    
+var cktsim = (function() {
 	///////////////////////////////////////////////////////////////////////////////
 	//
 	//  Circuit
 	//
 	//////////////////////////////////////////////////////////////////////////////
 
-	// types of "nodes" in the linear system
-	T_VOLTAGE = 0;
-	T_CURRENT = 1;
-
-        v_newt_lim = 0.3;   // Voltage limited Newton great for Mos/diodes
-	v_abstol = 1e-6;	// Absolute voltage error tolerance
-	i_abstol = 1e-12;	// Absolute current error tolerance
-        eps = 1.0e-12;           // A very small number compared to one.
-	dc_max_iters = 1000;	// max iterations before giving pu
-	max_tran_iters = 20;	// max iterations before giving up
-	time_step_increase_factor = 2.0;  // How much can lte let timestep grow.
-	lte_step_decrease_factor = 8;    // Limit lte one-iter timestep shrink.
-	nr_step_decrease_factor = 4;     // Newton failure timestep shink.
-	reltol = 0.0001;		// Relative tol to max observed value
-        lterel = 10;             // LTE/Newton tolerance ratio (> 10!)
-        res_check_abs = Math.sqrt(i_abstol); // Loose Newton residue check
-        res_check_rel = Math.sqrt(reltol); // Loose Newton residue check
+    // types of "nodes" in the linear system
+    var T_VOLTAGE = 0;
+    var T_CURRENT = 1;
+
+    var v_newt_lim = 0.3; // Voltage limited Newton great for Mos/diodes
+    var v_abstol = 1e-6; // Absolute voltage error tolerance
+    var i_abstol = 1e-12; // Absolute current error tolerance
+    var eps = 1.0e-12; // A very small number compared to one.
+    var dc_max_iters = 1000; // max iterations before giving up
+    var max_tran_iters = 20; // max iterations before giving up
+    var time_step_increase_factor = 2.0; // How much can lte let timestep grow.
+    var lte_step_decrease_factor = 8; // Limit lte one-iter timestep shrink.
+    var nr_step_decrease_factor = 4; // Newton failure timestep shrink.
+    var reltol = 0.0001; // Relative tol to max observed value
+    var lterel = 10; // LTE/Newton tolerance ratio (> 10!)
+    var res_check_abs = Math.sqrt(i_abstol); // Loose Newton residue check
+    var res_check_rel = Math.sqrt(reltol); // Loose Newton residue check
 
 	function Circuit() {
 	    this.node_map = new Array();
@@ -102,7 +101,7 @@ cktsim = (function() {
 		}
 
 		// Check for voltage source loops. 
-		n_vsrc = this.voltage_sources.length;
+        var n_vsrc = this.voltage_sources.length;
 		if (n_vsrc > 0) { // At least one voltage source
 		    var GV = mat_make(n_vsrc, this.N);  // Loop check
 		    for (var i = n_vsrc - 1; i >= 0; --i) {
@@ -201,6 +200,7 @@ cktsim = (function() {
 	    var converged,abssum_old=0, abssum_rhs;
 	    var use_limiting = false;
 	    var down_count = 0;
+        var thresh;
 
 	    // iteratively solve until values convere or iteration limit exceeded
 	    for (var iter = 0; iter < maxiters; iter++) {
@@ -774,6 +774,7 @@ cktsim = (function() {
 	}
 
         Circuit.prototype.opamp = function(np,nn,no,ng,A,name) {
+            var ratio;
 	    // try to convert string value into numeric value, barf if we can't
 	    if ((typeof A) == 'string') {
 		ratio = parse_number(A,undefined);
@@ -939,7 +940,7 @@ cktsim = (function() {
         // variables (rows that can be removed without changing rank(M).
         Circuit.prototype.algebraic = function(M) {
 	    var Nr = M.length
-	    Mc = mat_make(Nr, Nr);
+	    var Mc = mat_make(Nr, Nr);
 	    mat_copy(M,Mc);
 	    var R = mat_rank(Mc);
 
@@ -989,7 +990,7 @@ cktsim = (function() {
 	    var Nc = Mo[0].length;  // Number of columns
 	    var temp,i,j;
 	    // Make a copy to avoid overwriting
-	    M = mat_make(Nr, Nc);
+        var M = mat_make(Nr, Nc);
 	    mat_copy(Mo,M);
 
 	    // Find matrix maximum entry
@@ -1043,7 +1044,7 @@ cktsim = (function() {
         // M should have the extra column!
         // Almost everything is in-lined for speed, sigh.
         function mat_solve_rq(M, rhs) {
-
+            var scale;
 	    var Nr = M.length;  // Number of rows
 	    var Nc = M[0].length;  // Number of columns
 
@@ -1076,7 +1077,7 @@ cktsim = (function() {
 		}
 
 		// Calculate row norm, save if this is first (largest)
-		row_norm = Math.sqrt(maxsumsq);
+        var row_norm = Math.sqrt(maxsumsq);
 		if (row == 0) mat_scale = row_norm;
 
 		// Check for all zero rows
@@ -2042,20 +2043,18 @@ function prepare_schematics() {
 }
 
 schematic = (function() {
-	background_style = 'rgb(220,220,220)';
-	element_style = 'rgb(255,255,255)';
-	thumb_style = 'rgb(128,128,128)';
-	normal_style = 'rgb(0,0,0)';  // default drawing color
-	component_style = 'rgb(64,64,255)';  // color for unselected components
-	selected_style = 'rgb(64,255,64)';  // highlight color for selected components
-	grid_style = "rgb(128,128,128)";
-	annotation_style = 'rgb(255,64,64)';  // color for diagram annotations
-
-	property_size = 5;  // point size for Component property text
-	annotation_size = 6;  // point size for diagram annotations
-
-	// list of all the defined parts
-	parts_map = {
+    var background_style = 'rgb(220,220,220)';
+    var element_style = 'rgb(255,255,255)';
+    var thumb_style = 'rgb(128,128,128)';
+    var normal_style = 'rgb(0,0,0)';  // default drawing color
+    var component_style = 'rgb(64,64,255)';  // color for unselected components
+    var selected_style = 'rgb(64,255,64)';  // highlight color for selected components
+    var grid_style = "rgb(128,128,128)";
+    var annotation_style = 'rgb(255,64,64)';  // color for diagram annotations
+    var property_size = 5;  // point size for Component property text
+    var annotation_size = 6;  // point size for diagram annotations
+
+    var parts_map = {
 	    'g': [Ground, 'Ground connection'],
 	    'L': [Label, 'Node label'],
 	    'v': [VSource, 'Voltage source'],
@@ -2339,9 +2338,9 @@ schematic = (function() {
 	    this.zoomall();
 	}
 
-	part_w = 42;   // size of a parts bin compartment
-	part_h = 42;
-	status_height = 18;
+	var part_w = 42;   // size of a parts bin compartment
+	var part_h = 42;
+	var status_height = 18;
 
 	Schematic.prototype.add_component = function(new_c) {
 	    this.components.push(new_c);
@@ -2522,11 +2521,11 @@ schematic = (function() {
 	    this.redraw_background();
 	}
 
-	zoom_factor = 1.25;    // scaling is some power of zoom_factor
-	zoom_min = 0.5;
-	zoom_max = 4.0;
-	origin_min = -200;    // in grids
-	origin_max = 200;
+	var zoom_factor = 1.25;    // scaling is some power of zoom_factor
+	var zoom_min = 0.5;
+	var zoom_max = 4.0;
+	var origin_min = -200;    // in grids
+	var origin_max = 200;
 
 	Schematic.prototype.zoomin = function() {
 	    var nscale = this.scale * zoom_factor;
@@ -4076,17 +4075,17 @@ schematic = (function() {
 	    }
 	}
 
-	help_icon = 'data:image/gif;base64,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';
+	var help_icon = 'data:image/gif;base64,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';
 
-	cut_icon = 'data:image/gif;base64,R0lGODlhEAAQALMAAAAAAIAAAACAAICAAAAAgIAAgACAgMDAwICAgP8AAAD/AP//AAAA//8A/wD//////yH5BAEAAAcALAAAAAAQABAAAAQu8MhJqz1g5qs7lxv2gRkQfuWomarXEgDRHjJhf3YtyRav0xcfcFgR0nhB5OwTAQA7';
+	var cut_icon = 'data:image/gif;base64,R0lGODlhEAAQALMAAAAAAIAAAACAAICAAAAAgIAAgACAgMDAwICAgP8AAAD/AP//AAAA//8A/wD//////yH5BAEAAAcALAAAAAAQABAAAAQu8MhJqz1g5qs7lxv2gRkQfuWomarXEgDRHjJhf3YtyRav0xcfcFgR0nhB5OwTAQA7';
 
-	copy_icon = 'data:image/gif;base64,R0lGODlhEAAQALMAAAAAAIAAAACAAICAAAAAgIAAgACAgMDAwICAgP8AAAD/AP//AAAA//8A/wD//////yH5BAEAAAcALAAAAAAQABAAAAQ+8MhJ6wE4Wwqef9gmdV8HiKZJrCz3ecS7TikWfzExvk+M9a0a4MbTkXCgTMeoHPJgG5+yF31SLazsTMTtViIAOw==';
+	var copy_icon = 'data:image/gif;base64,R0lGODlhEAAQALMAAAAAAIAAAACAAICAAAAAgIAAgACAgMDAwICAgP8AAAD/AP//AAAA//8A/wD//////yH5BAEAAAcALAAAAAAQABAAAAQ+8MhJ6wE4Wwqef9gmdV8HiKZJrCz3ecS7TikWfzExvk+M9a0a4MbTkXCgTMeoHPJgG5+yF31SLazsTMTtViIAOw==';
 
-	paste_icon = 'data:image/gif;base64,R0lGODlhEAAQALMAAAAAAIAAAACAAICAAAAAgIAAgACAgMDAwICAgP8AAAD/AP//AAAA//8A/wD//////yH5BAEAAAcALAAAAAAQABAAAARL8MhJqwUYWJnxWp3GDcgAgCdQIqLKXmVLhhnyHiqpr7rME8AgocVDEB5IJHD0SyofBFzxGIQGAbvB0ZkcTq1CKK6z5YorwnR0w44AADs=';
+	var paste_icon = 'data:image/gif;base64,R0lGODlhEAAQALMAAAAAAIAAAACAAICAAAAAgIAAgACAgMDAwICAgP8AAAD/AP//AAAA//8A/wD//////yH5BAEAAAcALAAAAAAQABAAAARL8MhJqwUYWJnxWp3GDcgAgCdQIqLKXmVLhhnyHiqpr7rME8AgocVDEB5IJHD0SyofBFzxGIQGAbvB0ZkcTq1CKK6z5YorwnR0w44AADs=';
 
-	close_icon = 'data:image/gif;base64,R0lGODlhEAAQAMQAAGtra/f3/62tre/v9+bm787O1pycnHNzc6WlpcXFxd7e3tbW1nt7e7W1te/v74SEhMXFzmNjY+bm5v///87OzgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAAAAAAALAAAAAAQABAAAAVt4DRMZGmSwRQQBUS9MAwRIyQ5Uq7neEFSDtxOF4T8cobIQaE4RAQ5yjHHiCCSD510QtFGvoCFdppDfBu7bYzy+D7WP5ggAgA8Y3FKwi5IAhIweW1vbBGEWy5rilsFi2tGAwSJixAFBCkpJ5ojIQA7';
+	var close_icon = 'data:image/gif;base64,R0lGODlhEAAQAMQAAGtra/f3/62tre/v9+bm787O1pycnHNzc6WlpcXFxd7e3tbW1nt7e7W1te/v74SEhMXFzmNjY+bm5v///87OzgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAAAAAAALAAAAAAQABAAAAVt4DRMZGmSwRQQBUS9MAwRIyQ5Uq7neEFSDtxOF4T8cobIQaE4RAQ5yjHHiCCSD510QtFGvoCFdppDfBu7bYzy+D7WP5ggAgA8Y3FKwi5IAhIweW1vbBGEWy5rilsFi2tGAwSJixAFBCkpJ5ojIQA7';
 
-	grid_icon = 'data:image/gif;base64,R0lGODlhEAAQAMQAAAAAAP///zAwYT09bpGRqZ6et5iYsKWlvbi40MzM5cXF3czM5OHh5tTU2fDw84uMom49DbWKcfLy8g0NDcDAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABQALAAAAAAQABAAAAUtICWOZGmeKDCqIlu68AvMdO2ueHvGuslTN6Bt6MsBd8Zg77hsDW3FpRJFrYpCADs=';
+	var grid_icon = 'data:image/gif;base64,R0lGODlhEAAQAMQAAAAAAP///zAwYT09bpGRqZ6et5iYsKWlvbi40MzM5cXF3czM5OHh5tTU2fDw84uMom49DbWKcfLy8g0NDcDAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAABQALAAAAAAQABAAAAUtICWOZGmeKDCqIlu68AvMdO2ueHvGuslTN6Bt6MsBd8Zg77hsDW3FpRJFrYpCADs=';
 
 	///////////////////////////////////////////////////////////////////////////////
 	//
@@ -4491,14 +4490,14 @@ schematic = (function() {
 	}
 
 	function array_max(a) {
-	    max = -Infinity;
+        var max = -Infinity;
 	    for (var i = a.length - 1; i >= 0; --i)
 		if (a[i] > max) max = a[i];
 	    return max;
 	}
 
 	function array_min(a) {
-	    min = Infinity;
+        var min = Infinity;
 	    for (var i = a.length - 1; i >= 0; --i)
 		if (a[i] < min) min = a[i];
 	    return min;
@@ -5025,7 +5024,7 @@ schematic = (function() {
 	    this.sch.draw_arc(c,nx,ny,radius,0,2*Math.PI,false,1,filled);
 	}
 
-	rot_angle = [
+    var rot_angle = [
 		     0.0,		// NORTH (identity)
 		     Math.PI/2,	// EAST (rot270)
 		     Math.PI,	// SOUTH (rot180)
@@ -5034,7 +5033,7 @@ schematic = (function() {
 		     Math.PI/2,	// REAST (int-neg)
 		     Math.PI,	// RSOUTH (negx)
 		     3*Math.PI/2,	// RWEST (int-pos)
-		     ];
+     ];
 
 	Component.prototype.draw_arc = function(c,x,y,radius,start_radians,end_radians) {
 	    c.strokeStyle = this.selected ? selected_style :
@@ -5056,7 +5055,7 @@ schematic = (function() {
 	}
 
 	// result of rotating an alignment [rot*9 + align]
-	aOrient = [
+    var aOrient = [
 		   0, 1, 2, 3, 4, 5, 6, 7, 8,		// NORTH (identity)
 		   2, 5, 8, 1, 4, 7, 0, 3, 6, 		// EAST (rot270)
 		   8, 7, 6, 5, 4, 3, 2, 1, 0,		// SOUTH (rot180)
@@ -5067,13 +5066,13 @@ schematic = (function() {
 		   0, 3, 6, 1, 4, 7, 2, 5, 8		// RWEST (int-pos)
 		   ];
 
-	textAlign = [
+    var textAlign = [
 		     'left', 'center', 'right',
 		     'left', 'center', 'right',
 		     'left', 'center', 'right'
 		     ];
 
-	textBaseline = [
+    var textBaseline = [
 			'top', 'top', 'top',
 			'middle', 'middle', 'middle',
 			'bottom', 'bottom', 'bottom'
@@ -5186,7 +5185,7 @@ schematic = (function() {
 	//
 	////////////////////////////////////////////////////////////////////////////////
 
-	connection_point_radius = 2;
+    var connection_point_radius = 2;
 
 	function ConnectionPoint(parent,x,y) {
 	    this.parent = parent;
@@ -5287,7 +5286,7 @@ schematic = (function() {
 	//
 	////////////////////////////////////////////////////////////////////////////////
 
-	near_distance = 2;   // how close to wire counts as "near by"
+	var near_distance = 2;   // how close to wire counts as "near by"
 
 	function Wire(x1,y1,x2,y2) {
 	    // arbitrarily call x1,y1 the origin
@@ -5493,8 +5492,8 @@ schematic = (function() {
 	//
 	////////////////////////////////////////////////////////////////////////////////
 
-	probe_colors = ['red','green','blue','cyan','magenta','yellow','black','x-axis'];
-	probe_colors_rgb = {
+    var probe_colors = ['red','green','blue','cyan','magenta','yellow','black','x-axis'];
+    var probe_colors_rgb = {
 	    'red': 'rgb(255,64,64)',
 	    'green': 'rgb(64,255,64)',
 	    'blue': 'rgb(64,64,255)',
@@ -5798,7 +5797,7 @@ schematic = (function() {
 	//
 	////////////////////////////////////////////////////////////////////////////////
 
-	diode_types = ['normal','ideal'];
+	var diode_types = ['normal','ideal'];
 
 	function Diode(x,y,rotation,name,area,type) {
 	    Component.call(this,'d',x,y,rotation);
@@ -6064,7 +6063,7 @@ schematic = (function() {
 	}
 
 	// map source function name to labels for each source parameter
-	source_functions = {
+	var source_functions = {
 	    'dc': ['DC value'],
 
 	    'impulse': ['Height',