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middleman-cli/lib/middleman-templates/mobile/source/js/mylibs/helper.js

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+/*
+ * MBP - Mobile boilerplate helper functions
+ */
+(function(document){
+
+window.MBP = window.MBP || {}; 
+
+// Fix for iPhone viewport scale bug 
+// http://www.blog.highub.com/mobile-2/a-fix-for-iphone-viewport-scale-bug/
+
+MBP.viewportmeta = document.querySelector && document.querySelector('meta[name="viewport"]');
+MBP.ua = navigator.userAgent;
+
+MBP.scaleFix = function () {
+  if (MBP.viewportmeta && /iPhone|iPad/.test(MBP.ua) && !/Opera Mini/.test(MBP.ua)) {
+    MBP.viewportmeta.content = "width=device-width, minimum-scale=1.0, maximum-scale=1.0";
+    document.addEventListener("gesturestart", MBP.gestureStart, false);
+  }
+};
+MBP.gestureStart = function () {
+    MBP.viewportmeta.content = "width=device-width, minimum-scale=0.25, maximum-scale=1.6";
+};
+
+
+// Hide URL Bar for iOS and Android by Scott Jehl
+// https://gist.github.com/1183357
+
+MBP.hideUrlBar = function () {
+	var win = window,
+		doc = win.document;
+
+	// If there's a hash, or addEventListener is undefined, stop here
+	if( !location.hash || !win.addEventListener ){
+
+		//scroll to 1
+		window.scrollTo( 0, 1 );
+		var scrollTop = 1,
+
+		//reset to 0 on bodyready, if needed
+		bodycheck = setInterval(function(){
+			if( doc.body ){
+				clearInterval( bodycheck );
+				scrollTop = "scrollTop" in doc.body ? doc.body.scrollTop : 1;
+				win.scrollTo( 0, scrollTop === 1 ? 0 : 1 );
+			}	
+		}, 15 );
+
+		win.addEventListener( "load", function(){
+			setTimeout(function(){
+				//reset to hide addr bar at onload
+				win.scrollTo( 0, scrollTop === 1 ? 0 : 1 );
+			}, 0);
+		}, false );
+	}
+};
+
+
+// Fast Buttons - read wiki below before using
+// https://github.com/shichuan/mobile-html5-boilerplate/wiki/JavaScript-Helper
+
+MBP.fastButton = function (element, handler) {
+    this.element = element;
+    this.handler = handler;
+    if (element.addEventListener) {
+      element.addEventListener('touchstart', this, false);
+      element.addEventListener('click', this, false);
+    }
+};
+
+MBP.fastButton.prototype.handleEvent = function(event) {
+    switch (event.type) {
+        case 'touchstart': this.onTouchStart(event); break;
+        case 'touchmove': this.onTouchMove(event); break;
+        case 'touchend': this.onClick(event); break;
+        case 'click': this.onClick(event); break;
+    }
+};
+
+MBP.fastButton.prototype.onTouchStart = function(event) {
+    event.stopPropagation();
+    this.element.addEventListener('touchend', this, false);
+    document.body.addEventListener('touchmove', this, false);
+    this.startX = event.touches[0].clientX;
+    this.startY = event.touches[0].clientY;
+    this.element.style.backgroundColor = "rgba(0,0,0,.7)";
+};
+
+MBP.fastButton.prototype.onTouchMove = function(event) {
+    if(Math.abs(event.touches[0].clientX - this.startX) > 10 || 
+       Math.abs(event.touches[0].clientY - this.startY) > 10    ) {
+        this.reset();
+    }
+};
+
+MBP.fastButton.prototype.onClick = function(event) {
+    event.stopPropagation();
+    this.reset();
+    this.handler(event);
+    if(event.type == 'touchend') {
+        MBP.preventGhostClick(this.startX, this.startY);
+    }
+    this.element.style.backgroundColor = "";
+};
+
+MBP.fastButton.prototype.reset = function() {
+    this.element.removeEventListener('touchend', this, false);
+    document.body.removeEventListener('touchmove', this, false);
+    this.element.style.backgroundColor = "";
+};
+
+MBP.preventGhostClick = function (x, y) {
+    MBP.coords.push(x, y);
+    window.setTimeout(function (){
+        MBP.coords.splice(0, 2);
+    }, 2500);
+};
+
+MBP.ghostClickHandler = function (event) {
+    for(var i = 0, len = MBP.coords.length; i < len; i += 2) {
+        var x = MBP.coords[i];
+        var y = MBP.coords[i + 1];
+        if(Math.abs(event.clientX - x) < 25 && Math.abs(event.clientY - y) < 25) {
+            event.stopPropagation();
+            event.preventDefault();
+        }
+    }
+};
+
+if (document.addEventListener) {
+    document.addEventListener('click', MBP.ghostClickHandler, true);
+}
+                            
+MBP.coords = [];
+
+
+// iOS Startup Image
+// https://github.com/shichuan/mobile-html5-boilerplate/issues#issue/2
+
+MBP.splash = function () {
+    var filename = navigator.platform === 'iPad' ? 'h/' : 'l/';
+    document.write('<link rel="apple-touch-startup-image" href="/img/' + filename + 'splash.png" />' );
+};
+
+
+// Autogrow
+// http://googlecode.blogspot.com/2009/07/gmail-for-mobile-html5-series.html
+
+MBP.autogrow = function (element, lh) {
+
+    function handler(e){
+        var newHeight = this.scrollHeight,
+            currentHeight = this.clientHeight;
+        if (newHeight > currentHeight) {
+            this.style.height = newHeight + 3 * textLineHeight + "px";
+        }
+    }
+
+    var setLineHeight = (lh) ? lh : 12,
+        textLineHeight = element.currentStyle ? element.currentStyle.lineHeight : 
+                         getComputedStyle(element, null).lineHeight;
+
+    textLineHeight = (textLineHeight.indexOf("px") == -1) ? setLineHeight :
+                     parseInt(textLineHeight, 10);
+
+    element.style.overflow = "hidden";
+    element.addEventListener ? element.addEventListener('keyup', handler, false) :
+                               element.attachEvent('onkeyup', handler);
+};
+
+})(document);
+