slight tweak to zoom integration

1 files changed, 0 insertions, 257 deletions

diff --git a/lib/js/zoom.js b/lib/js/zoom.js
deleted file mode 100644
index 7fba523..0000000
--- a/lib/js/zoom.js
+++ /dev/null
@@ -1,257 +0,0 @@
-/*!
- * zoom.js 0.2 (modified version for use with reveal.js)
- * http://lab.hakim.se/zoom-js
- * MIT licensed
- * 
- * Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se
- */
-var zoom = (function(){
-
-	// The current zoom level (scale)
-	var level = 1;
-	
-	// The current mouse position, used for panning
-	var mouseX = 0,
-		mouseY = 0;
-	
-	// Timeout before pan is activated
-	var panEngageTimeout = -1,
-		panUpdateInterval = -1;
-
-	var currentOptions = null;
-
-	// Check for transform support so that we can fallback otherwise
-	var supportsTransforms = 	'WebkitTransform' in document.body.style ||
-								'MozTransform' in document.body.style ||
-								'msTransform' in document.body.style ||
-								'OTransform' in document.body.style ||
-								'transform' in document.body.style;
-    
-	if( supportsTransforms ) {
-		// The easing that will be applied when we zoom in/out
-		document.body.style.transition = 'transform 0.8s ease';
-		document.body.style.OTransition = '-o-transform 0.8s ease';
-		document.body.style.msTransition = '-ms-transform 0.8s ease';
-		document.body.style.MozTransition = '-moz-transform 0.8s ease';
-		document.body.style.WebkitTransition = '-webkit-transform 0.8s ease';
-	}
-	
-	// Zoom out if the user hits escape
-	document.addEventListener( 'keyup', function( event ) {
-		if( level !== 1 && event.keyCode === 27 ) {
-			zoom.out();
-		}
-	} );
-
-	// Monitor mouse movement for panning
-	document.addEventListener( 'mousemove', function( event ) {
-		if( level !== 1 ) {
-			mouseX = event.clientX;
-			mouseY = event.clientY;
-		}
-	} );
-
-	/**
-	 * Applies the CSS required to zoom in, prioritizes use of CSS3 
-	 * transforms but falls back on zoom for IE.
-	 * 
-	 * @param {Number} pageOffsetX 
-	 * @param {Number} pageOffsetY 
-	 * @param {Number} elementOffsetX 
-	 * @param {Number} elementOffsetY 
-	 * @param {Number} scale 
-	 */
-	function magnify( pageOffsetX, pageOffsetY, elementOffsetX, elementOffsetY, scale ) {
-
-		if( supportsTransforms ) {
-			var origin = pageOffsetX +'px '+ pageOffsetY +'px',
-				transform = 'translate('+ -elementOffsetX +'px,'+ -elementOffsetY +'px) scale('+ scale +')';
-			
-			document.body.style.transformOrigin = origin;
-			document.body.style.OTransformOrigin = origin;
-			document.body.style.msTransformOrigin = origin;
-			document.body.style.MozTransformOrigin = origin;
-			document.body.style.WebkitTransformOrigin = origin;
-
-			document.body.style.transform = transform;
-			document.body.style.OTransform = transform;
-			document.body.style.msTransform = transform;
-			document.body.style.MozTransform = transform;
-			document.body.style.WebkitTransform = transform;
-		}
-		else {
-			// Reset all values
-			if( scale === 1 ) {
-				document.body.style.position = '';
-				document.body.style.left = '';
-				document.body.style.top = '';
-				document.body.style.width = '';
-				document.body.style.height = '';
-				document.body.style.zoom = '';
-			}
-			// Apply scale
-			else {
-				document.body.style.position = 'relative';
-				document.body.style.left = ( - ( pageOffsetX + elementOffsetX ) / scale ) + 'px';
-				document.body.style.top = ( - ( pageOffsetY + elementOffsetY ) / scale ) + 'px';
-				document.body.style.width = ( scale * 100 ) + '%';
-				document.body.style.height = ( scale * 100 ) + '%';
-				document.body.style.zoom = scale;
-			}
-		}
-
-		level = scale;
-	}
-
-	/**
-	 * Pan the document when the mosue cursor approaches the edges 
-	 * of the window.
-	 */
-	function pan() {
-		var range = 0.12,
-			rangeX = window.innerWidth * range,
-			rangeY = window.innerHeight * range,
-			scrollOffset = getScrollOffset();
-		
-		// Up
-		if( mouseY < rangeY ) {
-			window.scroll( scrollOffset.x, scrollOffset.y - ( 1 - ( mouseY / rangeY ) ) * ( 14 / level ) );
-		}
-		// Down
-		else if( mouseY > window.innerHeight - rangeY ) {
-			window.scroll( scrollOffset.x, scrollOffset.y + ( 1 - ( window.innerHeight - mouseY ) / rangeY ) * ( 14 / level ) );
-		}
-
-		// Left
-		if( mouseX < rangeX ) {
-			window.scroll( scrollOffset.x - ( 1 - ( mouseX / rangeX ) ) * ( 14 / level ), scrollOffset.y );
-		}
-		// Right
-		else if( mouseX > window.innerWidth - rangeX ) {
-			window.scroll( scrollOffset.x + ( 1 - ( window.innerWidth - mouseX ) / rangeX ) * ( 14 / level ), scrollOffset.y );
-		}
-	}
-
-	function getScrollOffset() {
-		return {
-			x: window.scrollX !== undefined ? window.scrollX : window.pageXOffset,
-			y: window.scrollY !== undefined ? window.scrollY : window.pageXYffset
-		}
-	}
-
-	return {
-		/**
-		 * Zooms in on either a rectangle or HTML element.
-		 * 
-		 * @param {Object} options
-		 *   - element: HTML element to zoom in on
-		 *   OR
-		 *   - x/y: coordinates in non-transformed space to zoom in on
-		 *   - width/height: the portion of the screen to zoom in on
-		 *   - scale: can be used instead of width/height to explicitly set scale
-		 */
-		to: function( options ) {
-			// Due to an implementation limitation we can't zoom in
-			// to another element without zooming out first
-			if( level !== 1 ) {
-				zoom.out();
-			}
-			else {
-				options.x = options.x || 0;
-				options.y = options.y || 0;
-
-				// If an element is set, that takes precedence
-				if( !!options.element ) {
-					// Space around the zoomed in element to leave on screen
-					var padding = 20;
-
-					options.width = options.element.getBoundingClientRect().width + ( padding * 2 );
-					options.height = options.element.getBoundingClientRect().height + ( padding * 2 );
-					options.x = options.element.getBoundingClientRect().left - padding;
-					options.y = options.element.getBoundingClientRect().top - padding;
-				}
-
-				// If width/height values are set, calculate scale from those values
-				if( options.width !== undefined && options.height !== undefined ) {
-					options.scale = Math.max( Math.min( window.innerWidth / options.width, window.innerHeight / options.height ), 1 );
-				}
-
-				if( options.scale > 1 ) {
-					options.x *= options.scale;
-					options.y *= options.scale;
-
-					var scrollOffset = getScrollOffset();
-
-					if( options.element ) {
-						scrollOffset.x -= ( window.innerWidth - ( options.width * options.scale ) ) / 2;
-					}
-
-					magnify( scrollOffset.x, scrollOffset.y, options.x, options.y, options.scale );
-
-					if( options.pan !== false ) {
-
-						// Wait with engaging panning as it may conflict with the
-						// zoom transition
-						panEngageTimeout = setTimeout( function() {
-							panUpdateInterval = setInterval( pan, 1000 / 60 );
-						}, 800 );
-
-					}
-				}
-
-				currentOptions = options;
-			}
-		},
-
-		/**
-		 * Resets the document zoom state to its default.
-		 */
-		out: function() {
-			clearTimeout( panEngageTimeout );
-			clearInterval( panUpdateInterval );
-
-			var scrollOffset = getScrollOffset();
-
-			if( currentOptions && currentOptions.element ) {
-				scrollOffset.x -= ( window.innerWidth - ( currentOptions.width * currentOptions.scale ) ) / 2;
-			}
-			
-			magnify( scrollOffset.x, scrollOffset.y, 0, 0, 1 );
-
-			level = 1;
-		},
-
-		// Alias
-		magnify: function( options ) { this.to( options ) },
-		reset: function() { this.out() },
-		
-		zoomLevel: function() {
-			return level;
-		}
-	}
-	
-})();
-
-
-
-
-// Custom reveal.js integration
-(function(){
-	var modifierIsActive = false;
-
-	function updateKeyFlag( event ) {
-		modifierIsActive = event.altKey;
-	}
-
-	document.addEventListener( 'keypress', updateKeyFlag, false );
-	document.addEventListener( 'keydown', updateKeyFlag, false );
-	document.addEventListener( 'keyup', updateKeyFlag, false );
-
-	document.querySelector( '.reveal' ).addEventListener( 'click', function( event ) {
-		if( modifierIsActive ) {
-			event.preventDefault();
-			zoom.to({ element: event.target, pan: false });
-		}
-	} );
-})();
-