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support for swipe and pinch gestures #48

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This commit is contained in:
Hakim El Hattab 2012-06-02 17:45:06 -04:00
commit 4f08e2aeb0
2 changed files with 199 additions and 94 deletions
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199
js/reveal.js
View file

@ -53,7 +53,18 @@ var Reveal = (function(){
mouseWheelTimeout = 0,
// Delays updates to the URL due to a Chrome thumbnailer bug
writeURLTimeout = 0;
writeURLTimeout = 0,
// Holds information about the currently ongoing touch input
touch = {
startX: 0,
startY: 0,
startSpan: 0,
startCount: 0,
handled: false,
threshold: 40
};
/**
* Starts up the slideshow by applying configuration
@ -79,14 +90,7 @@ var Reveal = (function(){
dom.controlsUp = document.querySelector( '#reveal .controls .up' );
dom.controlsDown = document.querySelector( '#reveal .controls .down' );
// Bind all view events
document.addEventListener( 'keydown', onDocumentKeyDown, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
window.addEventListener( 'hashchange', onWindowHashChange, false );
dom.controlsLeft.addEventListener( 'click', preventAndForward( navigateLeft ), false );
dom.controlsRight.addEventListener( 'click', preventAndForward( navigateRight ), false );
dom.controlsUp.addEventListener( 'click', preventAndForward( navigateUp ), false );
dom.controlsDown.addEventListener( 'click', preventAndForward( navigateDown ), false );
addEventListeners();
// Copy options over to our config object
extend( config, options );
@ -135,6 +139,33 @@ var Reveal = (function(){
window.addEventListener( 'load', removeAddressBar, false );
window.addEventListener( 'orientationchange', removeAddressBar, false );
}
}
function addEventListeners() {
document.addEventListener( 'keydown', onDocumentKeyDown, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false );
document.addEventListener( 'touchend', onDocumentTouchEnd, false );
window.addEventListener( 'hashchange', onWindowHashChange, false );
dom.controlsLeft.addEventListener( 'click', preventAndForward( navigateLeft ), false );
dom.controlsRight.addEventListener( 'click', preventAndForward( navigateRight ), false );
dom.controlsUp.addEventListener( 'click', preventAndForward( navigateUp ), false );
dom.controlsDown.addEventListener( 'click', preventAndForward( navigateDown ), false );
}
function removeEventListeners() {
document.removeEventListener( 'keydown', onDocumentKeyDown, false );
document.removeEventListener( 'touchstart', onDocumentTouchStart, false );
document.removeEventListener( 'touchmove', onDocumentTouchMove, false );
document.removeEventListener( 'touchend', onDocumentTouchEnd, false );
window.removeEventListener( 'hashchange', onWindowHashChange, false );
dom.controlsLeft.removeEventListener( 'click', preventAndForward( navigateLeft ), false );
dom.controlsRight.removeEventListener( 'click', preventAndForward( navigateRight ), false );
dom.controlsUp.removeEventListener( 'click', preventAndForward( navigateUp ), false );
dom.controlsDown.removeEventListener( 'click', preventAndForward( navigateDown ), false );
}
/**
@ -147,6 +178,13 @@ var Reveal = (function(){
}
}
function distanceBetween( a, b ) {
var dx = a.x - b.x,
dy = a.y - b.y;
return Math.sqrt( dx*dx + dy*dy );
}
/**
* Prevents an events defaults behavior calls the
* specified delegate.
@ -224,54 +262,98 @@ var Reveal = (function(){
}
}
/**
* Handler for the document level 'touchstart' event.
*
* This enables very basic tap interaction for touch
* devices. Added mainly for performance testing of 3D
* transforms on iOS but was so happily surprised with
* how smoothly it runs so I left it in here. Apple +1
*
* @param {Object} event
* Handler for the document level 'touchstart' event,
* enables support for swipe and pinch gestures.
*/
function onDocumentTouchStart( event ) {
// We're only interested in one point taps
if (event.touches.length === 1) {
// Never prevent taps on anchors and images
if( event.target.tagName.toLowerCase() === 'a' || event.target.tagName.toLowerCase() === 'img' ) {
return;
touch.startX = event.touches[0].clientX;
touch.startY = event.touches[0].clientY;
touch.startCount = event.touches.length;
// If there's two touches we need to memorize the distance
// between those two points to detect pinching
if( event.touches.length === 2 ) {
touch.startSpan = distanceBetween( {
x: event.touches[1].clientX,
y: event.touches[1].clientY
}, {
x: touch.startX,
y: touch.startY
} );
}
}
/**
* Handler for the document level 'touchmove' event.
*/
function onDocumentTouchMove( event ) {
// Each touch should only trigger one action
if( !touch.handled ) {
var currentX = event.touches[0].clientX;
var currentY = event.touches[0].clientY;
// If the touch started off with two points and still has
// two active touches; test for the pinch gesture
if( event.touches.length === 2 && touch.startCount === 2 ) {
// The current distance in pixels between the two touch points
var currentSpan = distanceBetween( {
x: event.touches[1].clientX,
y: event.touches[1].clientY
}, {
x: touch.startX,
y: touch.startY
} );
// If the span is larger than the desire amount we've got
// ourselves a pinch
if( Math.abs( touch.startSpan - currentSpan ) > touch.threshold ) {
touch.handled = true;
if( currentSpan < touch.startSpan ) {
activateOverview();
}
else {
deactivateOverview();
}
}
}
// There was only one touch point, look for a swipe
else if( event.touches.length === 1 ) {
var deltaX = currentX - touch.startX,
deltaY = currentY - touch.startY;
if( deltaX > touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
touch.handled = true;
navigateLeft();
}
else if( deltaX < -touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
touch.handled = true;
navigateRight();
}
else if( deltaY > touch.threshold ) {
touch.handled = true;
navigateUp();
}
else if( deltaY < -touch.threshold ) {
touch.handled = true;
navigateDown();
}
}
event.preventDefault();
var point = {
x: event.touches[0].clientX,
y: event.touches[0].clientY
};
// Define the extent of the areas that may be tapped
// to navigate
var wt = window.innerWidth * 0.3;
var ht = window.innerHeight * 0.3;
if( point.x < wt ) {
navigateLeft();
}
else if( point.x > window.innerWidth - wt ) {
navigateRight();
}
else if( point.y < ht ) {
navigateUp();
}
else if( point.y > window.innerHeight - ht ) {
navigateDown();
}
slide();
}
}
/**
* Handler for the document level 'touchend' event.
*/
function onDocumentTouchEnd( event ) {
touch.handled = false;
}
/**
* Handles mouse wheel scrolling, throttled to avoid
@ -326,6 +408,7 @@ var Reveal = (function(){
* can't be improved.
*/
function activateOverview() {
dom.wrapper.classList.add( 'overview' );
var horizontalSlides = Array.prototype.slice.call( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) );
@ -341,12 +424,12 @@ var Reveal = (function(){
hslide.style.msTransform = htransform;
hslide.style.OTransform = htransform;
hslide.style.transform = htransform;
if( !hslide.classList.contains( 'stack' ) ) {
// Navigate to this slide on click
hslide.addEventListener( 'click', onOverviewSlideClicked, true );
}
var verticalSlides = Array.prototype.slice.call( hslide.querySelectorAll( 'section' ) );
for( var j = 0, len2 = verticalSlides.length; j < len2; j++ ) {
@ -365,6 +448,7 @@ var Reveal = (function(){
// Navigate to this slide on click
vslide.addEventListener( 'click', onOverviewSlideClicked, true );
}
}
}
@ -786,6 +870,18 @@ var Reveal = (function(){
availableRoutes().down ? navigateDown() : navigateRight();
}
}
/**
* Toggles the slide overview mode on and off.
*/
function toggleOverview() {
if( overviewIsActive() ) {
deactivateOverview();
}
else {
activateOverview();
}
}
// Expose some methods publicly
return {
@ -795,6 +891,7 @@ var Reveal = (function(){
navigateRight: navigateRight,
navigateUp: navigateUp,
navigateDown: navigateDown,
toggleOverview: toggleOverview,
// Forward event binding to the reveal DOM element
addEventListener: function( type, listener, useCapture ) {

94
js/reveal.min.js vendored
View file

@ -5,48 +5,56 @@
*
* Copyright (C) 2012 Hakim El Hattab, http://hakim.se
*/
var Reveal=(function(){var j="#reveal .slides>section",a="#reveal .slides>section.present>section",e=!!("ontouchstart" in window),k=0,c=0,G={controls:false,progress:false,history:false,loop:false,mouseWheel:true,rollingLinks:true,transition:"default",theme:"default"},N=[],d={},H=document.body.style.perspectiveProperty!==undefined||document.body.style.WebkitPerspective!==undefined||document.body.style.MozPerspective!==undefined||document.body.style.msPerspective!==undefined||document.body.style.OPerspective!==undefined,l=document.body.style.transformProperty!==undefined||document.body.style.WebkitTransform!==undefined||document.body.style.MozTransform!==undefined||document.body.style.msTransform!==undefined||document.body.style.OTransform!==undefined,v=0,y=0;
function h(P){if(!l&&!H){document.body.setAttribute("class","no-transforms");return;}d.wrapper=document.querySelector("#reveal");d.progress=document.querySelector("#reveal .progress");
var Reveal=(function(){var j="#reveal .slides>section",a="#reveal .slides>section.present>section",e=!!("ontouchstart" in window),k=0,c=0,H={controls:false,progress:false,history:false,loop:false,mouseWheel:true,rollingLinks:true,transition:"default",theme:"default"},U=[],d={},J=document.body.style.perspectiveProperty!==undefined||document.body.style.WebkitPerspective!==undefined||document.body.style.MozPerspective!==undefined||document.body.style.msPerspective!==undefined||document.body.style.OPerspective!==undefined,l=document.body.style.transformProperty!==undefined||document.body.style.WebkitTransform!==undefined||document.body.style.MozTransform!==undefined||document.body.style.msTransform!==undefined||document.body.style.OTransform!==undefined,v=0,y=0,P={startX:0,startY:0,startSpan:0,startCount:0,handled:false,threshold:40};
function h(W){if(!l&&!J){document.body.setAttribute("class","no-transforms");return;}d.wrapper=document.querySelector("#reveal");d.progress=document.querySelector("#reveal .progress");
d.progressbar=document.querySelector("#reveal .progress span");d.controls=document.querySelector("#reveal .controls");d.controlsLeft=document.querySelector("#reveal .controls .left");
d.controlsRight=document.querySelector("#reveal .controls .right");d.controlsUp=document.querySelector("#reveal .controls .up");d.controlsDown=document.querySelector("#reveal .controls .down");
document.addEventListener("keydown",M,false);document.addEventListener("touchstart",w,false);window.addEventListener("hashchange",t,false);d.controlsLeft.addEventListener("click",n(x),false);
d.controlsRight.addEventListener("click",n(i),false);d.controlsUp.addEventListener("click",n(r),false);d.controlsDown.addEventListener("click",n(A),false);
q(G,P);if(H===false){G.transition="linear";}if(G.controls){d.controls.style.display="block";}if(G.progress){d.progress.style.display="block";}if(G.transition!=="default"){d.wrapper.classList.add(G.transition);
}if(G.theme!=="default"){d.wrapper.classList.add(G.theme);}if(G.mouseWheel){document.addEventListener("DOMMouseScroll",m,false);document.addEventListener("mousewheel",m,false);
}if(G.rollingLinks){D();}C();if(navigator.userAgent.match(/(iphone|ipod|android)/i)){document.documentElement.style.overflow="scroll";document.body.style.height="120%";
window.addEventListener("load",K,false);window.addEventListener("orientationchange",K,false);}}function q(Q,P){for(var R in P){Q[R]=P[R];}}function n(P){return function(Q){Q.preventDefault();
P.call();};}function K(){setTimeout(function(){window.scrollTo(0,1);},0);}function M(Q){if(Q.target.contentEditable!="inherit"||Q.shiftKey||Q.altKey||Q.ctrlKey||Q.metaKey){return;
}var P=false;switch(Q.keyCode){case 80:case 33:I();P=true;break;case 78:case 34:u();P=true;break;case 72:case 37:x();P=true;break;case 76:case 39:i();P=true;
break;case 75:case 38:r();P=true;break;case 74:case 40:A();P=true;break;case 36:E(0);P=true;break;case 35:E(Number.MAX_VALUE);P=true;break;case 32:J()?L():u();
P=true;break;case 13:if(J()){L();P=true;}break;}if(P){Q.preventDefault();}else{if(Q.keyCode===27&&H){if(J()){L();}else{B();}Q.preventDefault();}}}function w(S){if(S.touches.length===1){if(S.target.tagName.toLowerCase()==="a"||S.target.tagName.toLowerCase()==="img"){return;
}S.preventDefault();var Q={x:S.touches[0].clientX,y:S.touches[0].clientY};var P=window.innerWidth*0.3;var R=window.innerHeight*0.3;if(Q.x<P){x();}else{if(Q.x>window.innerWidth-P){i();
}else{if(Q.y<R){r();}else{if(Q.y>window.innerHeight-R){A();}}}}b();}}function m(P){clearTimeout(v);v=setTimeout(function(){var Q=P.detail||-P.wheelDelta;
if(Q>0){u();}else{I();}},100);}function t(P){C();}function D(){if(H){var Q=document.querySelectorAll("#reveal .slides section a:not(.image)");for(var R=0,P=Q.length;
R<P;R++){var S=Q[R];if(S.textContent&&!S.querySelector("img")&&(!S.className||!S.classList.contains(S,"roll"))){S.classList.add("roll");S.innerHTML='<span data-title="'+S.text+'">'+S.innerHTML+"</span>";
}}}}function B(){d.wrapper.classList.add("overview");var P=Array.prototype.slice.call(document.querySelectorAll(j));for(var U=0,S=P.length;U<S;U++){var R=P[U],Y="translateZ(-2500px) translate("+((U-k)*105)+"%, 0%)";
R.setAttribute("data-index-h",U);R.style.display="block";R.style.WebkitTransform=Y;R.style.MozTransform=Y;R.style.msTransform=Y;R.style.OTransform=Y;R.style.transform=Y;
if(!R.classList.contains("stack")){R.addEventListener("click",z,true);}var X=Array.prototype.slice.call(R.querySelectorAll("section"));for(var T=0,Q=X.length;
T<Q;T++){var W=X[T],V="translate(0%, "+((T-c)*105)+"%)";W.setAttribute("data-index-h",U);W.setAttribute("data-index-v",T);W.style.display="block";W.style.WebkitTransform=V;
W.style.MozTransform=V;W.style.msTransform=V;W.style.OTransform=V;W.style.transform=V;W.addEventListener("click",z,true);}}}function L(){d.wrapper.classList.remove("overview");
var S=Array.prototype.slice.call(document.querySelectorAll("#reveal .slides section"));for(var R=0,P=S.length;R<P;R++){var Q=S[R];Q.style.WebkitTransform="";
Q.style.MozTransform="";Q.style.msTransform="";Q.style.OTransform="";Q.style.transform="";Q.removeEventListener("click",z);}b();}function J(){return d.wrapper.classList.contains("overview");
}function z(P){if(J()){P.preventDefault();L();k=this.getAttribute("data-index-h");c=this.getAttribute("data-index-v");b();}}function O(Q,S){var U=Array.prototype.slice.call(document.querySelectorAll(Q)),V=U.length;
if(V){if(G.loop){S%=V;if(S<0){S=V+S;}}S=Math.max(Math.min(S,V-1),0);for(var T=0;T<V;T++){var P=U[T];if(J()===false){var W=Math.abs((S-T)%(V-3))||0;P.style.display=W>3?"none":"block";
}U[T].classList.remove("past");U[T].classList.remove("present");U[T].classList.remove("future");if(T<S){U[T].classList.add("past");}else{if(T>S){U[T].classList.add("future");
}}if(P.querySelector("section")){U[T].classList.add("stack");}}U[S].classList.add("present");var R=U[S].getAttribute("data-state");if(R){N=N.concat(R.split(" "));
}}else{S=0;}return S;}function b(){var S=N.concat();N.length=0;k=O(j,k);c=O(a,c);stateLoop:for(var R=0,P=N.length;R<P;R++){for(var Q=0;Q<S.length;Q++){if(S[Q]===N[R]){S.splice(Q,1);
continue stateLoop;}}document.documentElement.classList.add(N[R]);o(N[R]);}while(S.length){document.documentElement.classList.remove(S.pop());}if(G.progress){d.progressbar.style.width=(k/(document.querySelectorAll(j).length-1))*window.innerWidth+"px";
}if(J()){B();}p();clearTimeout(y);y=setTimeout(g,1500);o("slidechanged",{indexh:k,indexv:c});}function p(){var P=f();[d.controlsLeft,d.controlsRight,d.controlsUp,d.controlsDown].forEach(function(Q){Q.classList.remove("enabled");
});if(P.left){d.controlsLeft.classList.add("enabled");}if(P.right){d.controlsRight.classList.add("enabled");}if(P.up){d.controlsUp.classList.add("enabled");
}if(P.down){d.controlsDown.classList.add("enabled");}}function f(){var P=document.querySelectorAll(j);var Q=document.querySelectorAll(a);return{left:k>0,right:k<P.length-1,up:c>0,down:c<Q.length-1};
}function C(){var P=window.location.hash.slice(2).split("/");k=parseInt(P[0])||0;c=parseInt(P[1])||0;E(k,c);}function g(){if(G.history){var P="/";if(k>0||c>0){P+=k;
}if(c>0){P+="/"+c;}window.location.hash=P;}}function o(Q,P){var R=document.createEvent("HTMLEvents",1,2);R.initEvent(Q,true,true);q(R,P);d.wrapper.dispatchEvent(R);
}function s(){if(document.querySelector(a+".present")){var Q=document.querySelectorAll(a+".present .fragment:not(.visible)");if(Q.length){Q[0].classList.add("visible");
o("fragmentshown",{fragment:Q[0]});return true;}}else{var P=document.querySelectorAll(j+".present .fragment:not(.visible)");if(P.length){P[0].classList.add("visible");
o("fragmentshown",{fragment:P[0]});return true;}}return false;}function F(){if(document.querySelector(a+".present")){var Q=document.querySelectorAll(a+".present .fragment.visible");
if(Q.length){Q[Q.length-1].classList.remove("visible");o("fragmenthidden",{fragment:Q[0]});return true;}}else{var P=document.querySelectorAll(j+".present .fragment.visible");
if(P.length){P[P.length-1].classList.remove("visible");o("fragmenthidden",{fragment:P[0]});return true;}}return false;}function E(Q,P){k=Q===undefined?k:Q;
c=P===undefined?c:P;b();}function x(){if(J()||F()===false){k--;c=0;b();}}function i(){if(J()||s()===false){k++;c=0;b();}}function r(){if(J()||F()===false){c--;
b();}}function A(){if(J()||s()===false){c++;b();}}function I(){if(F()===false){if(f().up){r();}else{var P=document.querySelector("#reveal .slides>section.past:nth-child("+k+")");
if(P){c=(P.querySelectorAll("section").length+1)||0;k--;b();}}}}function u(){if(s()===false){f().down?A():i();}}return{initialize:h,navigateTo:E,navigateLeft:x,navigateRight:i,navigateUp:r,navigateDown:A,addEventListener:function(Q,R,P){(d.wrapper||document.querySelector("#reveal")).addEventListener(Q,R,P);
},removeEventListener:function(Q,R,P){(d.wrapper||document.querySelector("#reveal")).removeEventListener(Q,R,P);}};})();
A();q(H,W);if(J===false){H.transition="linear";}if(H.controls){d.controls.style.display="block";}if(H.progress){d.progress.style.display="block";}if(H.transition!=="default"){d.wrapper.classList.add(H.transition);
}if(H.theme!=="default"){d.wrapper.classList.add(H.theme);}if(H.mouseWheel){document.addEventListener("DOMMouseScroll",m,false);document.addEventListener("mousewheel",m,false);
}if(H.rollingLinks){E();}D();if(navigator.userAgent.match(/(iphone|ipod|android)/i)){document.documentElement.style.overflow="scroll";document.body.style.height="120%";
window.addEventListener("load",Q,false);window.addEventListener("orientationchange",Q,false);}}function A(){document.addEventListener("keydown",T,false);
document.addEventListener("touchstart",w,false);document.addEventListener("touchmove",S,false);document.addEventListener("touchend",L,false);window.addEventListener("hashchange",t,false);
d.controlsLeft.addEventListener("click",n(x),false);d.controlsRight.addEventListener("click",n(i),false);d.controlsUp.addEventListener("click",n(r),false);
d.controlsDown.addEventListener("click",n(B),false);}function K(){document.removeEventListener("keydown",T,false);document.removeEventListener("touchstart",w,false);
document.removeEventListener("touchmove",S,false);document.removeEventListener("touchend",L,false);window.removeEventListener("hashchange",t,false);d.controlsLeft.removeEventListener("click",n(x),false);
d.controlsRight.removeEventListener("click",n(i),false);d.controlsUp.removeEventListener("click",n(r),false);d.controlsDown.removeEventListener("click",n(B),false);
}function q(X,W){for(var Y in W){X[Y]=W[Y];}}function I(Y,W){var Z=Y.x-W.x,X=Y.y-W.y;return Math.sqrt(Z*Z+X*X);}function n(W){return function(X){X.preventDefault();
W.call();};}function Q(){setTimeout(function(){window.scrollTo(0,1);},0);}function T(X){if(X.target.contentEditable!="inherit"||X.shiftKey||X.altKey||X.ctrlKey||X.metaKey){return;
}var W=false;switch(X.keyCode){case 80:case 33:N();W=true;break;case 78:case 34:u();W=true;break;case 72:case 37:x();W=true;break;case 76:case 39:i();W=true;
break;case 75:case 38:r();W=true;break;case 74:case 40:B();W=true;break;case 36:F(0);W=true;break;case 35:F(Number.MAX_VALUE);W=true;break;case 32:O()?R():u();
W=true;break;case 13:if(O()){R();W=true;}break;}if(W){X.preventDefault();}else{if(X.keyCode===27&&J){if(O()){R();}else{C();}X.preventDefault();}}}function w(W){P.startX=W.touches[0].clientX;
P.startY=W.touches[0].clientY;P.startCount=W.touches.length;if(W.touches.length===2){P.startSpan=I({x:W.touches[1].clientX,y:W.touches[1].clientY},{x:P.startX,y:P.startY});
}}function S(ab){if(!P.handled){var Z=ab.touches[0].clientX;var Y=ab.touches[0].clientY;if(ab.touches.length===2&&P.startCount===2){var aa=I({x:ab.touches[1].clientX,y:ab.touches[1].clientY},{x:P.startX,y:P.startY});
if(Math.abs(P.startSpan-aa)>P.threshold){P.handled=true;if(aa<P.startSpan){C();}else{R();}}}else{if(ab.touches.length===1){var X=Z-P.startX,W=Y-P.startY;
if(X>P.threshold&&Math.abs(X)>Math.abs(W)){P.handled=true;x();}else{if(X<-P.threshold&&Math.abs(X)>Math.abs(W)){P.handled=true;i();}else{if(W>P.threshold){P.handled=true;
r();}else{if(W<-P.threshold){P.handled=true;B();}}}}}}ab.preventDefault();}}function L(W){P.handled=false;}function m(W){clearTimeout(v);v=setTimeout(function(){var X=W.detail||-W.wheelDelta;
if(X>0){u();}else{N();}},100);}function t(W){D();}function E(){if(J){var X=document.querySelectorAll("#reveal .slides section a:not(.image)");for(var Y=0,W=X.length;
Y<W;Y++){var Z=X[Y];if(Z.textContent&&!Z.querySelector("img")&&(!Z.className||!Z.classList.contains(Z,"roll"))){Z.classList.add("roll");Z.innerHTML='<span data-title="'+Z.text+'">'+Z.innerHTML+"</span>";
}}}}function C(){d.wrapper.classList.add("overview");var W=Array.prototype.slice.call(document.querySelectorAll(j));for(var ab=0,Z=W.length;ab<Z;ab++){var Y=W[ab],af="translateZ(-2500px) translate("+((ab-k)*105)+"%, 0%)";
Y.setAttribute("data-index-h",ab);Y.style.display="block";Y.style.WebkitTransform=af;Y.style.MozTransform=af;Y.style.msTransform=af;Y.style.OTransform=af;
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