diff options
Diffstat (limited to 'plugin/zoom-js/zoom.js')
| -rw-r--r-- | plugin/zoom-js/zoom.js | 511 |
1 files changed, 256 insertions, 255 deletions
diff --git a/plugin/zoom-js/zoom.js b/plugin/zoom-js/zoom.js index 8531790..5b05eba 100644 --- a/plugin/zoom-js/zoom.js +++ b/plugin/zoom-js/zoom.js @@ -1,27 +1,27 @@ // Custom reveal.js integration -(function(){ - var revealElement = document.querySelector( '.reveal' ); - if( revealElement ) { +(function () { + var revealElement = document.querySelector('.reveal'); + if (revealElement) { - revealElement.addEventListener( 'mousedown', function( event ) { - var defaultModifier = /Linux/.test( window.navigator.platform ) ? 'ctrl' : 'alt'; + revealElement.addEventListener('mousedown', function (event) { + var defaultModifier = /Linux/.test(window.navigator.platform) ? 'ctrl' : 'alt'; - var modifier = ( Reveal.getConfig().zoomKey ? Reveal.getConfig().zoomKey : defaultModifier ) + 'Key'; - var zoomLevel = ( Reveal.getConfig().zoomLevel ? Reveal.getConfig().zoomLevel : 2 ); + var modifier = (Reveal.getConfig().zoomKey ? Reveal.getConfig().zoomKey : defaultModifier) + 'Key'; + var zoomLevel = (Reveal.getConfig().zoomLevel ? Reveal.getConfig().zoomLevel : 2); - if( event[ modifier ] && !Reveal.isOverview() ) { - event.preventDefault(); + if (event[modifier] && !Reveal.isOverview()) { + event.preventDefault(); - zoom.to({ - x: event.clientX, - y: event.clientY, - scale: zoomLevel, - pan: false - }); - } - } ); + zoom.to({ + x: event.clientX, + y: event.clientY, + scale: zoomLevel, + pan: false + }); + } + }); - } + } })(); /*! @@ -31,242 +31,243 @@ * * Copyright (C) 2011-2014 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; - - // 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, prefers the use of CSS3 - * transforms but falls back on zoom for IE. - * - * @param {Object} rect - * @param {Number} scale - */ - function magnify( rect, scale ) { - - var scrollOffset = getScrollOffset(); - - // Ensure a width/height is set - rect.width = rect.width || 1; - rect.height = rect.height || 1; - - // Center the rect within the zoomed viewport - rect.x -= ( window.innerWidth - ( rect.width * scale ) ) / 2; - rect.y -= ( window.innerHeight - ( rect.height * scale ) ) / 2; - - if( supportsTransforms ) { - // Reset - if( scale === 1 ) { - document.body.style.transform = ''; - document.body.style.OTransform = ''; - document.body.style.msTransform = ''; - document.body.style.MozTransform = ''; - document.body.style.WebkitTransform = ''; - } - // Scale - else { - var origin = scrollOffset.x +'px '+ scrollOffset.y +'px', - transform = 'translate('+ -rect.x +'px,'+ -rect.y +'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 - 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 = ''; - } - // Scale - else { - document.body.style.position = 'relative'; - document.body.style.left = ( - ( scrollOffset.x + rect.x ) / scale ) + 'px'; - document.body.style.top = ( - ( scrollOffset.y + rect.y ) / scale ) + 'px'; - document.body.style.width = ( scale * 100 ) + '%'; - document.body.style.height = ( scale * 100 ) + '%'; - document.body.style.zoom = scale; - } - } - - level = scale; - - if( document.documentElement.classList ) { - if( level !== 1 ) { - document.documentElement.classList.add( 'zoomed' ); - } - else { - document.documentElement.classList.remove( 'zoomed' ); - } - } - } - - /** - * 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.pageYOffset - } - } - - 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; - var bounds = options.element.getBoundingClientRect(); - - options.x = bounds.left - padding; - options.y = bounds.top - padding; - options.width = bounds.width + ( padding * 2 ); - options.height = bounds.height + ( padding * 2 ); - } - - // 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; - - magnify( options, 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 ); - - } - } - } - }, - - /** - * Resets the document zoom state to its default. - */ - out: function() { - clearTimeout( panEngageTimeout ); - clearInterval( panUpdateInterval ); - - magnify( { x: 0, y: 0 }, 1 ); - - level = 1; - }, - - // Alias - magnify: function( options ) { this.to( options ) }, - reset: function() { this.out() }, - - zoomLevel: function() { - return level; - } - } +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; + + // 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, prefers the use of CSS3 + * transforms but falls back on zoom for IE. + * + * @param {Object} rect + * @param {Number} scale + */ + function magnify(rect, scale) { + + var scrollOffset = getScrollOffset(); + + // Ensure a width/height is set + rect.width = rect.width || 1; + rect.height = rect.height || 1; + + // Center the rect within the zoomed viewport + rect.x -= (window.innerWidth - (rect.width * scale)) / 2; + rect.y -= (window.innerHeight - (rect.height * scale)) / 2; + + if (supportsTransforms) { + // Reset + if (scale === 1) { + document.body.style.transform = ''; + document.body.style.OTransform = ''; + document.body.style.msTransform = ''; + document.body.style.MozTransform = ''; + document.body.style.WebkitTransform = ''; + } + // Scale + else { + var origin = scrollOffset.x + 'px ' + scrollOffset.y + 'px', + transform = 'translate(' + -rect.x + 'px,' + -rect.y + '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 + 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 = ''; + } + // Scale + else { + document.body.style.position = 'relative'; + document.body.style.left = (-(scrollOffset.x + rect.x) / scale) + 'px'; + document.body.style.top = (-(scrollOffset.y + rect.y) / scale) + 'px'; + document.body.style.width = (scale * 100) + '%'; + document.body.style.height = (scale * 100) + '%'; + document.body.style.zoom = scale; + } + } + + level = scale; + + if (document.documentElement.classList) { + if (level !== 1) { + document.documentElement.classList.add('zoomed'); + } else { + document.documentElement.classList.remove('zoomed'); + } + } + } + + /** + * 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.pageYOffset + } + } + + 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; + var bounds = options.element.getBoundingClientRect(); + + options.x = bounds.left - padding; + options.y = bounds.top - padding; + options.width = bounds.width + (padding * 2); + options.height = bounds.height + (padding * 2); + } + + // 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; + + magnify(options, 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); + + } + } + } + }, + + /** + * Resets the document zoom state to its default. + */ + out: function () { + clearTimeout(panEngageTimeout); + clearInterval(panUpdateInterval); + + magnify({x: 0, y: 0}, 1); + + level = 1; + }, + + // Alias + magnify: function (options) { + this.to(options) + }, + reset: function () { + this.out() + }, + + zoomLevel: function () { + return level; + } + } })(); |