rework dash code

This does some restructuring and cleanups to make the code more similar to what
is current upstream, where the custom dash code was entirely dropped in favor of
native dashing done through the browser.

kothic/renderer/path.js

@@ -37,13 +37,6 @@ Kothic.path = (function () {
 		};
 	}
 
-	function moveTo(ctx, point, dashes) {
-		ctx.moveTo(point[0], point[1]);
-		if (dashes) {
-			setDashPattern(point, dashes);
-		}
-	}
-
 	function dashTo(ctx, point) {
 		var pt = dashPattern,
 			dx = point[0] - pt.x,
@@ -172,7 +165,8 @@ Kothic.path = (function () {
 					screenPoint = Kothic.geom.transformPoint(point, ws, hs);
 
 					if (j === 0) {
-						moveTo(ctx, screenPoint, dashes);
+						ctx.moveTo(screenPoint[0], screenPoint[1]);
+						setDashPattern(screenPoint, dashes);
 					} else if (dashes) {
 						dashTo(ctx, screenPoint);
 					} else {
@@ -191,9 +185,11 @@ Kothic.path = (function () {
 						point = points[j] || points[0];
 						screenPoint = Kothic.geom.transformPoint(point, ws, hs);
 
-						if (j === 0 || (!fill &&
-								checkSameBoundary(point, prevPoint, granularity))) {
-							moveTo(ctx, screenPoint, dashes);
+						if (j === 0) {
+							ctx.moveTo(screenPoint[0], screenPoint[1]);
+							setDashPattern(screenPoint, dashes);
+						} else if (!fill && checkSameBoundary(point, prevPoint, granularity)) {
+							ctx.moveTo(screenPoint[0], screenPoint[1]);
 						} else if (fill || !dashes) {
 							ctx.lineTo(screenPoint[0], screenPoint[1]);
 						} else {