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Viewing / Editing File: okzoom.js

/*
 * OKZoom by OKFocus v1.2
 * http://okfoc.us // @okfocus
 * Copyright 2012 OKFocus
 * Licensed under the MIT License
**/

$(function($){

// Identify browser based on useragent string
  var browser = (function( ua ) {
    ua = ua.toLowerCase();
    var match = /(chrome)[ \/]([\w.]+)/.exec( ua ) ||
      /(webkit)[ \/]([\w.]+)/.exec( ua ) ||
      /(opera)(?:.*version|)[ \/]([\w.]+)/.exec( ua ) ||
      /(msie) ([\w.]+)/.exec( ua ) ||
      ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( ua ) ||
      [];
    var matched = {
      browser: match[ 1 ] || "",
      version: match[ 2 ] || "0"
    };
    browser = {};
    if ( matched.browser ) {
        browser[ matched.browser ] = true;
        browser.version = matched.version;
    }
    // Chrome is Webkit, but Webkit is also Safari.
    if ( browser.chrome ) {
      browser.webkit = true;
    } else if ( browser.webkit ) {
      browser.safari = true;
    }
    if (window.$) $.browser = browser;
    return browser;
  })( navigator.userAgent );

var is_iphone = (navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))
  var is_ipad = (navigator.userAgent.match(/iPad/i))
  var is_android = (navigator.userAgent.match(/Android/i))
  var is_mobile = is_iphone || is_ipad || is_android
  var is_desktop = ! is_mobile;
  var transitionProp = browser.safari ? "WebkitTransition" : "transition";
  var transformProp = browser.safari ? "WebkitTransform" : "transform";
  var longTransformProp = browser.safari ? "-webkit-transform" : "transform";
  var transformOriginProp = browser.safari ? "WebkitTransformOrigin" : "transformOrigin";

$.fn.okzoom = function(options){
    options = $.extend({}, $.fn.okzoom.defaults, options);

return this.each(function(){
      var base = {};
      var el = this;
      base.options = options;
      base.$el = $(el);
      base.el = el;

base.listener = document.createElement('div');
      base.$listener = $(base.listener).addClass('ok-listener').css({
        position: 'absolute',
        zIndex: 10000
      });
      $('body').append(base.$listener);

var loupe = document.createElement("div");
      loupe.id = "ok-loupe";
      loupe.style.position = "absolute";
      loupe.style.backgroundRepeat = "no-repeat";
      loupe.style.pointerEvents = "none";
      loupe.style.opacity = 0;
      loupe.style.zIndex = 7879;
      $('body').append(loupe);
      base.loupe = loupe;

base.$el.data("okzoom", base);

base.options = options;
      
      if (is_mobile) {
        base.$el.bind('touchstart', (function(b) {
          return function(e) {
            console.log("TS", e)
            e.preventDefault()
            $.fn.okzoom.build(b, e.originalEvent.touches[0]);
          };
        }(base)));

base.$el.bind('touchmove', (function(b) {
          return function(e) {
            console.log("TM")
            e.preventDefault()
            $.fn.okzoom.mousemove(b, e.originalEvent.touches[0]);
          };
        }(base)));

base.$el.bind('touchend', (function(b) {
          return function(e) {
            console.log("TE")
            e.preventDefault()
            $.fn.okzoom.mouseout(b, e);
          };
        }(base)));
      }
      else {
        $(base.el).bind('mouseover', (function(b) {
          return function(e) { $.fn.okzoom.build(b, e); };
        }(base)));

base.$listener.bind('mousemove', (function(b) {
          return function(e) { $.fn.okzoom.mousemove(b, e); };
        }(base)));

base.$listener.bind('mouseout', (function(b) {
          return function(e) { $.fn.okzoom.mouseout(b, e); };
        }(base)));
      }

base.options.height = base.options.height || base.options.width;

base.image_from_data = base.$el.data("okimage");
      base.has_data_image = typeof base.image_from_data !== "undefined";
      base.timeout = null

if (base.has_data_image) {
        base.img = new Image ();
        base.img.src = base.image_from_data;
      }

base.msie = -1; // Return value assumes failure.
      if (navigator.appName == 'Microsoft Internet Explorer') {
        var ua = navigator.userAgent;
        var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
        if (re.exec(ua) != null)
          base.msie = parseFloat(RegExp.$1);
      }
    });
  };

$.fn.okzoom.defaults = {
    "width": 150,
    "height": null,
    "scaleWidth": null,
    "round": true,
    "background": "#fff",
    "backgroundRepeat": "no-repeat",
    "shadow": "0 0 5px #000",
    "inset": 0,
    "border": 0,
    "transform": is_mobile ? ["scale(0)","scale(1)"] : null,
    "transformOrigin": is_mobile ? "50% 100%" : "50% 50%",
    "transitionTime": 200,
    "transitionTimingFunction": "cubic-bezier(0,0,0,1)",
  };

$.fn.okzoom.build = function(base, e){
    if (! base.has_data_image) {
      base.img = base.el;
    }
    else if (base.image_from_data != base.$el.attr('data-okimage')) {
      // data() returns cached values, whereas attr() returns from the dom.
      base.image_from_data = base.$el.attr('data-okimage');

$(base.img).remove();
      base.img = new Image();
      base.img.src = base.image_from_data;
    }

if (base.msie > -1 && base.msie < 9.0 && !base.img.naturalized) {
      var naturalize = function(img) {
        img = img || this;
        var io = new Image();

io.el = img;
        io.src = img.src;

img.naturalWidth = io.width;
        img.naturalHeight = io.height;
        img.naturalized = true;
      };
      if (base.img.complete) naturalize(base.img);
      else return;
    }

base.offset = base.$el.offset();
    base.width = base.$el.width();
    base.height = base.$el.height();
    base.$listener.css({
      display: 'block',
      width: base.$el.outerWidth(),
      height: base.$el.outerHeight(),
      top: base.$el.offset().top,
      left: base.$el.offset().left
    });

if (base.options.scaleWidth) {
      base.naturalWidth = base.options.scaleWidth;
      base.naturalHeight = Math.round( base.img.naturalHeight * base.options.scaleWidth / base.img.naturalWidth );
    } else {
      base.naturalWidth = base.img.naturalWidth;
      base.naturalHeight = base.img.naturalHeight;
    }

base.widthRatio = base.naturalWidth / base.width;
    base.heightRatio = base.naturalHeight / base.height;

base.loupe.style.width = base.options.width + "px";
    base.loupe.style.height = base.options.height + "px";
    base.loupe.style.border = base.options.border;
    base.loupe.style.background = base.options.background + " url(" + base.img.src + ")";
    base.loupe.style.backgroundRepeat = base.options.backgroundRepeat;
    base.loupe.style.backgroundSize = base.options.scaleWidth ?
        base.naturalWidth + "px " + base.naturalHeight + "px" : "auto";
    base.loupe.style.borderRadius =
    base.loupe.style.MozBorderRadius =
    base.loupe.style.WebkitBorderRadius = base.options.round ? "50%" : 0;
    base.loupe.style.boxShadow = base.options.shadow;
    base.loupe.style.opacity = 0;
    if (base.options.transform) {
      base.loupe.style[transformProp] = base.options.transform[0]
      base.loupe.style[transformOriginProp] = base.options.transformOrigin
      base.loupe.style[transitionProp] = longTransformProp + " " + base.options.transitionTime
    }
    base.initialized = true;
    $.fn.okzoom.mousemove(base, e);
  };

$.fn.okzoom.mousemove = function (base, e) {
    if (!base.initialized) return;
    var shimLeft = base.options.width / 2;
    var shimTop = base.options.height / 2;
    var offsetTop = is_mobile ? base.options.height : shimTop
    var pageX = typeof e.pageX !== 'undefined' ? e.pageX :
        (e.clientX + document.documentElement.scrollLeft);
    var pageY = typeof e.pageY !== 'undefined' ? e.pageY :
        (e.clientY + document.documentElement.scrollTop);
    var scaleLeft = -1 * Math.floor( (pageX - base.offset.left) * base.widthRatio - shimLeft );
    var scaleTop  = -1 * Math.floor( (pageY - base.offset.top) * base.heightRatio - shimTop );

document.body.style.cursor = "none";
    // base.loupe.style.display = "block";
    base.loupe.style.left = pageX - shimLeft + "px";
    base.loupe.style.top = pageY - offsetTop + "px";
    base.loupe.style.backgroundPosition = scaleLeft + "px " + scaleTop + "px";
    base.loupe.style.opacity = 1;
    if (base.options.transform) {
      base.loupe.style[transformProp] = base.options.transform[1]
      base.loupe.style[transformProp] = base.options.transform[1]
      base.loupe.style[transitionProp] = longTransformProp + " " + base.options.transitionTime + "ms " + base.options.transitionTimingFunction
    }
    clearTimeout(base.timeout)
  };

$.fn.okzoom.mouseout = function (base, e) {
    // base.loupe.style.display = "none";
    if (base.options.transform) {
      base.loupe.style[transformProp] = base.options.transform[0]
      base.timeout = setTimeout(function(){
        base.loupe.style.opacity = 0;
      }, base.options.transitionTime);
    }
    else {
      base.loupe.style.opacity = 0;
    }
    base.loupe.style.background = "none";
    base.listener.style.display = "none";
    document.body.style.cursor = "auto";
  };

});

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