minor preload tweak, removed useless parameter

lib/ComicBook.js

@@ -12,6 +12,7 @@
 		- really need to speed up enhancements, try to use webworkers
 	
 	Nice 2 have:
+		- smart preload, start 5 before pointer and load from there, on navigation update preload position
 		- offline access
 		- thumbnail browser
 		- page turn animation? (http://www.cynergysystems.com/blogs/page/rickbarraza?entry=the_secret_behind_the_page)
@@ -60,11 +61,14 @@ function ComicBook(id, srcs, opts) {
 	var context;		// the 2d drawing context
 	
 	var buffer = 4;		// image preload buffer level
-	var pointer = 0;	// the current page
+
 	var loaded = 0;		// the amount of images that have been loaded so far
 
 	var scale = 1;		// page zoom scale, 1 = 100%
 
+	// the current page, can pass a default as a url hash
+	var pointer = (parseInt(window.location.hash.replace('#',''),10) - 1) || 0;
+	
 	/**
 	 * Figure out the cursor position relative to the canvas.
 	 *
@@ -95,7 +99,6 @@ function ComicBook(id, srcs, opts) {
 	 * @see #ComicBook.prototype.enhance
 	 */
 	function init() {
-	
 		// setup canvas
 		canvas = document.getElementById(canvas_id);
 		context = canvas.getContext("2d");
@@ -105,8 +108,6 @@ function ComicBook(id, srcs, opts) {
 	}
 	
 	/* 
-	 * @param {String} id The canvas ID to draw the comic on.
-	 * @param {Object} srcs An array of all the comic page srcs, in order
 	 * @see #preload
 	 */
 	ComicBook.prototype.draw = function () {
@@ -114,7 +115,7 @@ function ComicBook(id, srcs, opts) {
 		init();
 
 		// preload images if needed
-		if (pages.length !== no_pages) { this.preload(this.srcs); }
+		if (pages.length !== no_pages) { this.preload(); }
 		else { this.drawPage(); }
 	};
 
@@ -132,10 +133,11 @@ function ComicBook(id, srcs, opts) {
 	/**
 	 * Preload all images, draw the page only after a given number have been loaded.
 	 *
-	 * @param srcs {Object} srcs
 	 * @see #drawPage
 	 */
-	ComicBook.prototype.preload = function (srcs) {
+	ComicBook.prototype.preload = function () {
+
+		var srcs = this.srcs;
 
 		if (no_pages < buffer) { buffer = no_pages; } // don't get stuck if the buffer level is higher than the number of pages
 		
@@ -189,7 +191,6 @@ function ComicBook(id, srcs, opts) {
 
 		var zoom_scale;
 		var offsetW = 0, offsetH = 0;
-		
 		var page = pages[pointer];
 		var page2 = pages[pointer + 1];
 		
@@ -266,6 +267,8 @@ function ComicBook(id, srcs, opts) {
 		context.drawImage(page, offsetW, offsetH, page_width, page_height);
 		if (options.displayMode === "double" && typeof page2 === "object") { context.drawImage(page2, page_width + offsetW, offsetH, page_width, page_height); }
 
+		window.location.hash = pointer + 1;
+		
 		// apply any image enhancements previously defined
 		$.each(options.enhance, function(action, options) {
 			ComicBook.prototype.enhance[action](options);