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Modularise handlers.

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This commit is contained in:
Hyunje Alex Jun 2015-01-30 23:00:17 +00:00
parent 0acf3602f0
commit a52a945226
9 changed files with 729 additions and 600 deletions
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20
src/js/lib/helper.js
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@ -61,6 +61,26 @@ exports.outerWidth = function (element) {
this.toInt(d.css(element, 'borderRightWidth'));
};
exports.startScrolling = function (element, axis) {
cls.add(element, 'ps-in-scrolling');
if (typeof axis !== 'undefined') {
cls.add(element, 'ps-' + axis);
} else {
cls.add(element, 'ps-x');
cls.add(element, 'ps-y');
}
};
exports.stopScrolling = function (element, axis) {
cls.remove(element, 'ps-in-scrolling');
if (typeof axis !== 'undefined') {
cls.remove(element, 'ps-' + axis);
} else {
cls.remove(element, 'ps-x');
cls.remove(element, 'ps-y');
}
};
exports.env = {
isWebKit: 'WebkitAppearance' in document.documentElement.style,
supportsTouch: (('ontouchstart' in window) || window.DocumentTouch && document instanceof window.DocumentTouch),

52
src/js/plugin/handler/click-rail.js Normal file
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@ -0,0 +1,52 @@
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
* Licensed under the MIT License
*/
'use strict';
var h = require('../../lib/helper')
, instances = require('../instances');
function bindClickRailHandler(element, i) {
function pageOffset(el) {
return el.getBoundingClientRect();
}
var stopPropagation = window.Event.prototype.stopPropagation.bind;
i.event.bind(i.scrollbarY, 'click', stopPropagation);
i.event.bind(i.scrollbarYRail, 'click', function (e) {
var halfOfScrollbarLength = h.toInt(i.scrollbarYHeight / 2);
var positionTop = e.pageY - pageOffset(i.scrollbarYRail).top - halfOfScrollbarLength;
var maxPositionTop = i.containerHeight - i.scrollbarYHeight;
var positionRatio = positionTop / maxPositionTop;
if (positionRatio < 0) {
positionRatio = 0;
} else if (positionRatio > 1) {
positionRatio = 1;
}
element.scrollTop = (i.contentHeight - i.containerHeight) * positionRatio;
});
i.event.bind(i.scrollbarX, 'click', stopPropagation);
i.event.bind(i.scrollbarXRail, 'click', function (e) {
var halfOfScrollbarLength = h.toInt(i.scrollbarXWidth / 2);
var positionLeft = e.pageX - pageOffset(i.scrollbarXRail).left - halfOfScrollbarLength;
console.log(e.pageX, i.scrollbarXRail.offsetLeft);
var maxPositionLeft = i.containerWidth - i.scrollbarXWidth;
var positionRatio = positionLeft / maxPositionLeft;
if (positionRatio < 0) {
positionRatio = 0;
} else if (positionRatio > 1) {
positionRatio = 1;
}
element.scrollLeft = (i.contentWidth - i.containerWidth) * positionRatio;
});
}
module.exports = function (element) {
var i = instances.get(element);
bindClickRailHandler(element, i);
};

105
src/js/plugin/handler/drag-scrollbar.js Normal file
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@ -0,0 +1,105 @@
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
* Licensed under the MIT License
*/
'use strict';
var d = require('../../lib/dom')
, h = require('../../lib/helper')
, instances = require('../instances')
, updateGeometry = require('../update');
function bindMouseScrollXHandler(element, i) {
var currentLeft = null;
var currentPageX = null;
function updateScrollLeft(deltaX) {
var newLeft = currentLeft + deltaX;
var maxLeft = i.containerWidth - i.scrollbarXWidth;
if (newLeft < 0) {
i.scrollbarXLeft = 0;
} else if (newLeft > maxLeft) {
i.scrollbarXLeft = maxLeft;
} else {
i.scrollbarXLeft = newLeft;
}
var scrollLeft = h.toInt(i.scrollbarXLeft * (i.contentWidth - i.containerWidth) / (i.containerWidth - i.scrollbarXWidth));
element.scrollLeft = scrollLeft;
}
var mouseMoveHandler = function (e) {
updateScrollLeft(e.pageX - currentPageX);
updateGeometry(element);
e.stopPropagation();
e.preventDefault();
};
var mouseUpHandler = function () {
h.stopScrolling(element, 'x');
i.event.unbind(i.ownerDocument, 'mousemove', mouseMoveHandler);
};
i.event.bind(i.scrollbarX, 'mousedown', function (e) {
currentPageX = e.pageX;
currentLeft = h.toInt(d.css(i.scrollbarX, 'left'));
h.startScrolling(element, 'x');
i.event.bind(i.ownerDocument, 'mousemove', mouseMoveHandler);
i.event.once(i.ownerDocument, 'mouseup', mouseUpHandler);
e.stopPropagation();
e.preventDefault();
});
}
function bindMouseScrollYHandler(element, i) {
var currentTop = null;
var currentPageY = null;
function updateScrollTop(deltaY) {
var newTop = currentTop + deltaY;
var maxTop = i.containerHeight - i.scrollbarYHeight;
if (newTop < 0) {
i.scrollbarYTop = 0;
} else if (newTop > maxTop) {
i.scrollbarYTop = maxTop;
} else {
i.scrollbarYTop = newTop;
}
var scrollTop = h.toInt(i.scrollbarYTop * (i.contentHeight - i.containerHeight) / (i.containerHeight - i.scrollbarYHeight));
element.scrollTop = scrollTop;
}
var mouseMoveHandler = function (e) {
updateScrollTop(e.pageY - currentPageY);
updateGeometry(element);
e.stopPropagation();
e.preventDefault();
};
var mouseUpHandler = function () {
h.stopScrolling(element, 'y');
i.event.unbind(i.ownerDocument, 'mousemove', mouseMoveHandler);
};
i.event.bind(i.scrollbarY, 'mousedown', function (e) {
currentPageY = e.pageY;
currentTop = h.toInt(d.css(i.scrollbarY, 'top'));
h.startScrolling(element, 'y');
i.event.bind(i.ownerDocument, 'mousemove', mouseMoveHandler);
i.event.once(i.ownerDocument, 'mouseup', mouseUpHandler);
e.stopPropagation();
e.preventDefault();
});
}
module.exports = function (element) {
var i = instances.get(element);
bindMouseScrollXHandler(element, i);
bindMouseScrollYHandler(element, i);
};

114
src/js/plugin/handler/keyboard.js Normal file
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@ -0,0 +1,114 @@
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
* Licensed under the MIT License
*/
'use strict';
var h = require('../../lib/helper')
, instances = require('../instances');
function bindKeyboardHandler(element, i) {
var hovered = false;
i.event.bind(element, 'mouseenter', function () {
hovered = true;
});
i.event.bind(element, 'mouseleave', function () {
hovered = false;
});
var shouldPrevent = false;
function shouldPreventDefault(deltaX, deltaY) {
var scrollTop = element.scrollTop;
if (deltaX === 0) {
if (!i.scrollbarYActive) {
return false;
}
if ((scrollTop === 0 && deltaY > 0) || (scrollTop >= i.contentHeight - i.containerHeight && deltaY < 0)) {
return !i.settings.wheelPropagation;
}
}
var scrollLeft = element.scrollLeft;
if (deltaY === 0) {
if (!i.scrollbarXActive) {
return false;
}
if ((scrollLeft === 0 && deltaX < 0) || (scrollLeft >= i.contentWidth - i.containerWidth && deltaX > 0)) {
return !i.settings.wheelPropagation;
}
}
return true;
}
i.event.bind(i.ownerDocument, 'keydown', function (e) {
if (e.isDefaultPrevented && e.isDefaultPrevented()) {
return;
}
if (!hovered) {
return;
}
var activeElement = document.activeElement ? document.activeElement : i.ownerDocument.activeElement;
// go deeper if element is a webcomponent
while (activeElement.shadowRoot) {
activeElement = activeElement.shadowRoot.activeElement;
}
if (h.isEditable(activeElement)) {
return;
}
var deltaX = 0;
var deltaY = 0;
switch (e.which) {
case 37: // left
deltaX = -30;
break;
case 38: // up
deltaY = 30;
break;
case 39: // right
deltaX = 30;
break;
case 40: // down
deltaY = -30;
break;
case 33: // page up
deltaY = 90;
break;
case 32: // space bar
case 34: // page down
deltaY = -90;
break;
case 35: // end
if (e.ctrlKey) {
deltaY = -i.contentHeight;
} else {
deltaY = -i.containerHeight;
}
break;
case 36: // home
if (e.ctrlKey) {
deltaY = element.scrollTop;
} else {
deltaY = i.containerHeight;
}
break;
default:
return;
}
element.scrollTop = element.scrollTop - deltaY;
element.scrollLeft = element.scrollLeft + deltaX;
shouldPrevent = shouldPreventDefault(deltaX, deltaY);
if (shouldPrevent) {
e.preventDefault();
}
});
}
module.exports = function (element) {
var i = instances.get(element);
bindKeyboardHandler(element, i);
};

119
src/js/plugin/handler/mouse-wheel.js Normal file
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@ -0,0 +1,119 @@
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
* Licensed under the MIT License
*/
'use strict';
var h = require('../../lib/helper')
, instances = require('../instances')
, updateGeometry = require('../update');
function bindMouseWheelHandler(element, i) {
var shouldPrevent = false;
function shouldPreventDefault(deltaX, deltaY) {
var scrollTop = element.scrollTop;
if (deltaX === 0) {
if (!i.scrollbarYActive) {
return false;
}
if ((scrollTop === 0 && deltaY > 0) || (scrollTop >= i.contentHeight - i.containerHeight && deltaY < 0)) {
return !i.settings.wheelPropagation;
}
}
var scrollLeft = element.scrollLeft;
if (deltaY === 0) {
if (!i.scrollbarXActive) {
return false;
}
if ((scrollLeft === 0 && deltaX < 0) || (scrollLeft >= i.contentWidth - i.containerWidth && deltaX > 0)) {
return !i.settings.wheelPropagation;
}
}
return true;
}
function getDeltaFromEvent(e) {
var deltaX = e.deltaX;
var deltaY = -1 * e.deltaY;
if (typeof deltaX === "undefined" || typeof deltaY === "undefined") {
// OS X Safari
deltaX = -1 * e.wheelDeltaX / 6;
deltaY = e.wheelDeltaY / 6;
}
if (e.deltaMode && e.deltaMode === 1) {
// Firefox in deltaMode 1: Line scrolling
deltaX *= 10;
deltaY *= 10;
}
if (deltaX !== deltaX && deltaY !== deltaY/* NaN checks */) {
// IE in some mouse drivers
deltaX = 0;
deltaY = e.wheelDelta;
}
return [deltaX, deltaY];
}
function mousewheelHandler(e) {
// FIXME: this is a quick fix for the select problem in FF and IE.
// If there comes an effective way to deal with the problem,
// this lines should be removed.
if (!h.env.isWebKit && element.querySelector('select:focus')) {
return;
}
var delta = getDeltaFromEvent(e);
var deltaX = delta[0];
var deltaY = delta[1];
shouldPrevent = false;
if (!i.settings.useBothWheelAxes) {
// deltaX will only be used for horizontal scrolling and deltaY will
// only be used for vertical scrolling - this is the default
element.scrollTop = element.scrollTop - (deltaY * i.settings.wheelSpeed);
element.scrollLeft = element.scrollLeft + (deltaX * i.settings.wheelSpeed);
} else if (i.scrollbarYActive && !i.scrollbarXActive) {
// only vertical scrollbar is active and useBothWheelAxes option is
// active, so let's scroll vertical bar using both mouse wheel axes
if (deltaY) {
element.scrollTop = element.scrollTop - (deltaY * i.settings.wheelSpeed);
} else {
element.scrollTop = element.scrollTop + (deltaX * i.settings.wheelSpeed);
}
shouldPrevent = true;
} else if (i.scrollbarXActive && !i.scrollbarYActive) {
// useBothWheelAxes and only horizontal bar is active, so use both
// wheel axes for horizontal bar
if (deltaX) {
element.scrollLeft = element.scrollLeft + (deltaX * i.settings.wheelSpeed);
} else {
element.scrollLeft = element.scrollLeft - (deltaY * i.settings.wheelSpeed);
}
shouldPrevent = true;
}
updateGeometry(element);
shouldPrevent = (shouldPrevent || shouldPreventDefault(deltaX, deltaY));
if (shouldPrevent) {
e.stopPropagation();
e.preventDefault();
}
}
if (typeof window.onwheel !== "undefined") {
i.event.bind(element, 'wheel', mousewheelHandler);
} else if (typeof window.onmousewheel !== "undefined") {
i.event.bind(element, 'mousewheel', mousewheelHandler);
}
}
module.exports = function (element) {
var i = instances.get(element);
bindMouseWheelHandler(element, i);
};

18
src/js/plugin/handler/native-scroll.js Normal file
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@ -0,0 +1,18 @@
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
* Licensed under the MIT License
*/
'use strict';
var instances = require('../instances')
, updateGeometry = require('../update');
function bindNativeScrollHandler(element, i) {
i.event.bind(element, 'scroll', function () {
updateGeometry(element);
});
}
module.exports = function (element) {
var i = instances.get(element);
bindNativeScrollHandler(element, i);
};

111
src/js/plugin/handler/selection.js Normal file
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@ -0,0 +1,111 @@
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
* Licensed under the MIT License
*/
'use strict';
var h = require('../../lib/helper')
, instances = require('../instances')
, updateGeometry = require('../update');
function bindSelectionHandler(element, i) {
function getRangeNode() {
var selection = window.getSelection ? window.getSelection() :
document.getSlection ? document.getSlection() : {rangeCount: 0};
if (selection.rangeCount === 0) {
return null;
} else {
return selection.getRangeAt(0).commonAncestorContainer;
}
}
var scrollingLoop = null;
var scrollDiff = {top: 0, left: 0};
function startScrolling() {
if (!scrollingLoop) {
scrollingLoop = setInterval(function () {
if (!instances.get(element)) {
clearInterval(scrollingLoop);
return;
}
element.scrollTop = element.scrollTop + scrollDiff.top;
element.scrollLeft = element.scrollLeft + scrollDiff.left;
updateGeometry(element);
}, 50); // every .1 sec
}
}
function stopScrolling() {
if (scrollingLoop) {
clearInterval(scrollingLoop);
scrollingLoop = null;
}
h.stopScrolling(element);
}
var isSelected = false;
i.event.bind(i.ownerDocument, 'selectionchange', function () {
if (element.contains(getRangeNode())) {
isSelected = true;
} else {
isSelected = false;
stopScrolling();
}
});
i.event.bind(window, 'mouseup', function () {
if (isSelected) {
isSelected = false;
stopScrolling();
}
});
i.event.bind(window, 'mousemove', function (e) {
if (isSelected) {
var mousePosition = {x: e.pageX, y: e.pageY};
var containerGeometry = {
left: element.offsetLeft,
right: element.offsetLeft + element.offsetWidth,
top: element.offsetTop,
bottom: element.offsetTop + element.offsetHeight
};
if (mousePosition.x < containerGeometry.left + 3) {
scrollDiff.left = -5;
h.startScrolling(element, 'x');
} else if (mousePosition.x > containerGeometry.right - 3) {
scrollDiff.left = 5;
h.startScrolling(element, 'x');
} else {
scrollDiff.left = 0;
}
if (mousePosition.y < containerGeometry.top + 3) {
if (containerGeometry.top + 3 - mousePosition.y < 5) {
scrollDiff.top = -5;
} else {
scrollDiff.top = -20;
}
h.startScrolling(element, 'y');
} else if (mousePosition.y > containerGeometry.bottom - 3) {
if (mousePosition.y - containerGeometry.bottom + 3 < 5) {
scrollDiff.top = 5;
} else {
scrollDiff.top = 20;
}
h.startScrolling(element, 'y');
} else {
scrollDiff.top = 0;
}
if (scrollDiff.top === 0 && scrollDiff.left === 0) {
stopScrolling();
} else {
startScrolling();
}
}
});
}
module.exports = function (element) {
var i = instances.get(element);
bindSelectionHandler(element, i);
};

170
src/js/plugin/handler/touch.js Normal file
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@ -0,0 +1,170 @@
/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
* Licensed under the MIT License
*/
'use strict';
var instances = require('../instances')
, updateGeometry = require('../update');
function bindTouchHandler(element, i, supportsTouch, supportsIePointer) {
function shouldPreventDefault(deltaX, deltaY) {
var scrollTop = element.scrollTop;
var scrollLeft = element.scrollLeft;
var magnitudeX = Math.abs(deltaX);
var magnitudeY = Math.abs(deltaY);
if (magnitudeY > magnitudeX) {
// user is perhaps trying to swipe up/down the page
if (((deltaY < 0) && (scrollTop === i.contentHeight - i.containerHeight)) ||
((deltaY > 0) && (scrollTop === 0))) {
return !i.settings.swipePropagation;
}
} else if (magnitudeX > magnitudeY) {
// user is perhaps trying to swipe left/right across the page
if (((deltaX < 0) && (scrollLeft === i.contentWidth - i.containerWidth)) ||
((deltaX > 0) && (scrollLeft === 0))) {
return !i.settings.swipePropagation;
}
}
return true;
}
function applyTouchMove(differenceX, differenceY) {
element.scrollTop = element.scrollTop - differenceY;
element.scrollLeft = element.scrollLeft() - differenceX;
updateGeometry(element);
}
var startOffset = {};
var startTime = 0;
var speed = {};
var easingLoop = null;
var inGlobalTouch = false;
var inLocalTouch = false;
function globalTouchStart() {
inGlobalTouch = true;
}
function globalTouchEnd() {
inGlobalTouch = false;
}
function getTouch(e) {
if (e.targetTouches) {
return e.targetTouches[0];
} else {
// Maybe IE pointer
return e;
}
}
function shouldHandle(e) {
if (e.targetTouches && e.targetTouches.length === 1) {
return true;
}
if (e.pointerType && e.pointerType !== 'mouse' && e.pointerType !== e.MSPOINTER_TYPE_MOUSE) {
return true;
}
return false;
}
function touchStart(e) {
if (shouldHandle(e)) {
inLocalTouch = true;
var touch = getTouch(e);
startOffset.pageX = touch.pageX;
startOffset.pageY = touch.pageY;
startTime = (new Date()).getTime();
if (easingLoop !== null) {
clearInterval(easingLoop);
}
e.stopPropagation();
}
}
function touchMove(e) {
if (!inGlobalTouch && inLocalTouch && shouldHandle(e)) {
var touch = getTouch(e);
var currentOffset = {pageX: touch.pageX, pageY: touch.pageY};
var differenceX = currentOffset.pageX - startOffset.pageX;
var differenceY = currentOffset.pageY - startOffset.pageY;
applyTouchMove(differenceX, differenceY);
startOffset = currentOffset;
var currentTime = (new Date()).getTime();
var timeGap = currentTime - startTime;
if (timeGap > 0) {
speed.x = differenceX / timeGap;
speed.y = differenceY / timeGap;
startTime = currentTime;
}
if (shouldPreventDefault(differenceX, differenceY)) {
e.stopPropagation();
e.preventDefault();
}
}
}
function touchEnd() {
if (!inGlobalTouch && inLocalTouch) {
inLocalTouch = false;
clearInterval(easingLoop);
easingLoop = setInterval(function () {
if (!instances.get(element)) {
clearInterval(easingLoop);
return;
}
if (Math.abs(speed.x) < 0.01 && Math.abs(speed.y) < 0.01) {
clearInterval(easingLoop);
return;
}
applyTouchMove(speed.x * 30, speed.y * 30);
speed.x *= 0.8;
speed.y *= 0.8;
}, 10);
}
}
if (supportsTouch) {
i.event.bind(window, 'touchstart', globalTouchStart);
i.event.bind(window, 'touchend', globalTouchEnd);
i.event.bind(element, 'touchstart', touchStart);
i.event.bind(element, 'touchmove', touchMove);
i.event.bind(element, 'touchend', touchEnd);
}
if (supportsIePointer) {
if (window.PointerEvent) {
i.event.bind(window, 'pointerdown', globalTouchStart);
i.event.bind(window, 'pointerup', globalTouchEnd);
i.event.bind(element, 'pointerdown', touchStart);
i.event.bind(element, 'pointermove', touchMove);
i.event.bind(element, 'pointerup', touchEnd);
} else if (window.MSPointerEvent) {
i.event.bind(window, 'MSPointerDown', globalTouchStart);
i.event.bind(window, 'MSPointerUp', globalTouchEnd);
i.event.bind(element, 'MSPointerDown', touchStart);
i.event.bind(element, 'MSPointerMove', touchMove);
i.event.bind(element, 'MSPointerUp', touchEnd);
}
}
}
module.exports = function (element, supportsTouch, supportsIePointer) {
var i = instances.get(element);
bindTouchHandler(element, i, supportsTouch, supportsIePointer);
};

620
src/js/plugin/initialize.js
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@ -4,11 +4,19 @@
'use strict';
var cls = require('../lib/class')
, d = require('../lib/dom')
, h = require('../lib/helper')
, instances = require('./instances')
, updateGeometry = require('./update');
// Handlers
var clickRailHandler = require('./handler/click-rail')
, dragScrollbarHandler = require('./handler/drag-scrollbar')
, keyboardHandler = require('./handler/keyboard')
, mouseWheelHandler = require('./handler/mouse-wheel')
, nativeScrollHandler = require('./handler/native-scroll')
, selectionHandler = require('./handler/selection')
, touchHandler = require('./handler/touch');
module.exports = function (element, userSettings) {
userSettings = typeof userSettings === 'object' ? userSettings : {};
@ -19,606 +27,18 @@ module.exports = function (element, userSettings) {
i.settings = h.extend(i.settings, userSettings);
function updateScrollTop(currentTop, deltaY) {
var newTop = currentTop + deltaY;
var maxTop = i.containerHeight - i.scrollbarYHeight;
clickRailHandler(element);
dragScrollbarHandler(element);
mouseWheelHandler(element);
nativeScrollHandler(element);
selectionHandler(element);
if (newTop < 0) {
i.scrollbarYTop = 0;
} else if (newTop > maxTop) {
i.scrollbarYTop = maxTop;
} else {
i.scrollbarYTop = newTop;
}
var scrollTop = h.toInt(i.scrollbarYTop * (i.contentHeight - i.containerHeight) / (i.containerHeight - i.scrollbarYHeight));
element.scrollTop = scrollTop;
if (h.env.supportsTouch || h.env.supportsIePointer) {
touchHandler(element, h.env.supportsTouch, h.env.supportsIePointer);
}
if (i.settings.useKeyboard) {
keyboardHandler(element);
}
function updateScrollLeft(currentLeft, deltaX) {
var newLeft = currentLeft + deltaX;
var maxLeft = i.containerWidth - i.scrollbarXWidth;
if (newLeft < 0) {
i.scrollbarXLeft = 0;
} else if (newLeft > maxLeft) {
i.scrollbarXLeft = maxLeft;
} else {
i.scrollbarXLeft = newLeft;
}
var scrollLeft = h.toInt(i.scrollbarXLeft * (i.contentWidth - i.containerWidth) / (i.containerWidth - i.scrollbarXWidth));
element.scrollLeft = scrollLeft;
}
function bindMouseScrollXHandler() {
var currentLeft;
var currentPageX;
var mouseMoveHandler = function (e) {
updateScrollLeft(currentLeft, e.pageX - currentPageX);
updateGeometry(element);
e.stopPropagation();
e.preventDefault();
};
var mouseUpHandler = function () {
cls.remove(element, 'ps-x');
cls.remove(element, 'ps-in-scrolling');
i.event.unbind(i.ownerDocument, 'mousemove', mouseMoveHandler);
};
i.event.bind(i.scrollbarX, 'mousedown', function (e) {
currentPageX = e.pageX;
currentLeft = h.toInt(d.css(i.scrollbarX, 'left'));
cls.add(element, 'ps-in-scrolling');
cls.add(element, 'ps-x');
i.event.bind(i.ownerDocument, 'mousemove', mouseMoveHandler);
i.event.once(i.ownerDocument, 'mouseup', mouseUpHandler);
e.stopPropagation();
e.preventDefault();
});
currentLeft =
currentPageX = null;
}
function bindMouseScrollYHandler() {
var currentTop;
var currentPageY;
var mouseMoveHandler = function (e) {
updateScrollTop(currentTop, e.pageY - currentPageY);
updateGeometry(element);
e.stopPropagation();
e.preventDefault();
};
var mouseUpHandler = function () {
cls.remove(element, 'ps-y');
cls.remove(element, 'ps-in-scrolling');
i.event.unbind(i.ownerDocument, 'mousemove', mouseMoveHandler);
};
i.event.bind(i.scrollbarY, 'mousedown', function (e) {
currentPageY = e.pageY;
currentTop = h.toInt(d.css(i.scrollbarY, 'top'));
cls.add(element, 'ps-in-scrolling');
cls.add(element, 'ps-y');
i.event.bind(i.ownerDocument, 'mousemove', mouseMoveHandler);
i.event.once(i.ownerDocument, 'mouseup', mouseUpHandler);
e.stopPropagation();
e.preventDefault();
});
currentTop =
currentPageY = null;
}
function shouldPreventWheel(deltaX, deltaY) {
var scrollTop = element.scrollTop;
if (deltaX === 0) {
if (!i.scrollbarYActive) {
return false;
}
if ((scrollTop === 0 && deltaY > 0) || (scrollTop >= i.contentHeight - i.containerHeight && deltaY < 0)) {
return !i.settings.wheelPropagation;
}
}
var scrollLeft = element.scrollLeft;
if (deltaY === 0) {
if (!i.scrollbarXActive) {
return false;
}
if ((scrollLeft === 0 && deltaX < 0) || (scrollLeft >= i.contentWidth - i.containerWidth && deltaX > 0)) {
return !i.settings.wheelPropagation;
}
}
return true;
}
function shouldPreventSwipe(deltaX, deltaY) {
var scrollTop = element.scrollTop;
var scrollLeft = element.scrollLeft;
var magnitudeX = Math.abs(deltaX);
var magnitudeY = Math.abs(deltaY);
if (magnitudeY > magnitudeX) {
// user is perhaps trying to swipe up/down the page
if (((deltaY < 0) && (scrollTop === i.contentHeight - i.containerHeight)) ||
((deltaY > 0) && (scrollTop === 0))) {
return !i.settings.swipePropagation;
}
} else if (magnitudeX > magnitudeY) {
// user is perhaps trying to swipe left/right across the page
if (((deltaX < 0) && (scrollLeft === i.contentWidth - i.containerWidth)) ||
((deltaX > 0) && (scrollLeft === 0))) {
return !i.settings.swipePropagation;
}
}
return true;
}
function bindMouseWheelHandler() {
var shouldPrevent = false;
function getDeltaFromEvent(e) {
var deltaX = e.deltaX;
var deltaY = -1 * e.deltaY;
if (typeof deltaX === "undefined" || typeof deltaY === "undefined") {
// OS X Safari
deltaX = -1 * e.wheelDeltaX / 6;
deltaY = e.wheelDeltaY / 6;
}
if (e.deltaMode && e.deltaMode === 1) {
// Firefox in deltaMode 1: Line scrolling
deltaX *= 10;
deltaY *= 10;
}
if (deltaX !== deltaX && deltaY !== deltaY/* NaN checks */) {
// IE in some mouse drivers
deltaX = 0;
deltaY = e.wheelDelta;
}
return [deltaX, deltaY];
}
function mousewheelHandler(e) {
// FIXME: this is a quick fix for the select problem in FF and IE.
// If there comes an effective way to deal with the problem,
// this lines should be removed.
if (!h.env.isWebKit && element.querySelector('select:focus')) {
return;
}
var delta = getDeltaFromEvent(e);
var deltaX = delta[0];
var deltaY = delta[1];
shouldPrevent = false;
if (!i.settings.useBothWheelAxes) {
// deltaX will only be used for horizontal scrolling and deltaY will
// only be used for vertical scrolling - this is the default
element.scrollTop = element.scrollTop - (deltaY * i.settings.wheelSpeed);
element.scrollLeft = element.scrollLeft + (deltaX * i.settings.wheelSpeed);
} else if (i.scrollbarYActive && !i.scrollbarXActive) {
// only vertical scrollbar is active and useBothWheelAxes option is
// active, so let's scroll vertical bar using both mouse wheel axes
if (deltaY) {
element.scrollTop = element.scrollTop - (deltaY * i.settings.wheelSpeed);
} else {
element.scrollTop = element.scrollTop + (deltaX * i.settings.wheelSpeed);
}
shouldPrevent = true;
} else if (i.scrollbarXActive && !i.scrollbarYActive) {
// useBothWheelAxes and only horizontal bar is active, so use both
// wheel axes for horizontal bar
if (deltaX) {
element.scrollLeft = element.scrollLeft + (deltaX * i.settings.wheelSpeed);
} else {
element.scrollLeft = element.scrollLeft - (deltaY * i.settings.wheelSpeed);
}
shouldPrevent = true;
}
updateGeometry(element);
shouldPrevent = (shouldPrevent || shouldPreventWheel(deltaX, deltaY));
if (shouldPrevent) {
e.stopPropagation();
e.preventDefault();
}
}
if (typeof window.onwheel !== "undefined") {
i.event.bind(element, 'wheel', mousewheelHandler);
} else if (typeof window.onmousewheel !== "undefined") {
i.event.bind(element, 'mousewheel', mousewheelHandler);
}
}
function bindKeyboardHandler() {
var hovered = false;
i.event.bind(element, 'mouseenter', function () {
hovered = true;
});
i.event.bind(element, 'mouseleave', function () {
hovered = false;
});
var shouldPrevent = false;
i.event.bind(i.ownerDocument, 'keydown', function (e) {
if (e.isDefaultPrevented && e.isDefaultPrevented()) {
return;
}
if (!hovered) {
return;
}
var activeElement = document.activeElement ? document.activeElement : i.ownerDocument.activeElement;
// go deeper if element is a webcomponent
while (activeElement.shadowRoot) {
activeElement = activeElement.shadowRoot.activeElement;
}
if (h.isEditable(activeElement)) {
return;
}
var deltaX = 0;
var deltaY = 0;
switch (e.which) {
case 37: // left
deltaX = -30;
break;
case 38: // up
deltaY = 30;
break;
case 39: // right
deltaX = 30;
break;
case 40: // down
deltaY = -30;
break;
case 33: // page up
deltaY = 90;
break;
case 32: // space bar
case 34: // page down
deltaY = -90;
break;
case 35: // end
if (e.ctrlKey) {
deltaY = -i.contentHeight;
} else {
deltaY = -i.containerHeight;
}
break;
case 36: // home
if (e.ctrlKey) {
deltaY = element.scrollTop;
} else {
deltaY = i.containerHeight;
}
break;
default:
return;
}
element.scrollTop = element.scrollTop - deltaY;
element.scrollLeft = element.scrollLeft + deltaX;
shouldPrevent = shouldPreventWheel(deltaX, deltaY);
if (shouldPrevent) {
e.preventDefault();
}
});
}
function bindRailClickHandler() {
var stopPropagation = window.Event.prototype.stopPropagation.bind;
i.event.bind(i.scrollbarY, 'click', stopPropagation);
i.event.bind(i.scrollbarYRail, 'click', function (e) {
var halfOfScrollbarLength = h.toInt(i.scrollbarYHeight / 2);
var positionTop = e.pageY - i.scrollbarYRail.offsetTop - halfOfScrollbarLength;
var maxPositionTop = i.containerHeight - i.scrollbarYHeight;
var positionRatio = positionTop / maxPositionTop;
if (positionRatio < 0) {
positionRatio = 0;
} else if (positionRatio > 1) {
positionRatio = 1;
}
element.scrollTop = (i.contentHeight - i.containerHeight) * positionRatio;
});
i.event.bind(i.scrollbarX, 'click', stopPropagation);
i.event.bind(i.scrollbarXRail, 'click', function (e) {
var halfOfScrollbarLength = h.toInt(i.scrollbarXWidth / 2);
var positionLeft = e.pageX - i.scrollbarXRail.offsetLeft - halfOfScrollbarLength;
var maxPositionLeft = i.containerWidth - i.scrollbarXWidth;
var positionRatio = positionLeft / maxPositionLeft;
if (positionRatio < 0) {
positionRatio = 0;
} else if (positionRatio > 1) {
positionRatio = 1;
}
element.scrollLeft = (i.contentWidth - i.containerWidth) * positionRatio;
});
}
function bindSelectionHandler() {
function getRangeNode() {
var selection = window.getSelection ? window.getSelection() :
document.getSlection ? document.getSlection() : {rangeCount: 0};
if (selection.rangeCount === 0) {
return null;
} else {
return selection.getRangeAt(0).commonAncestorContainer;
}
}
var scrollingLoop = null;
var scrollDiff = {top: 0, left: 0};
function startScrolling() {
if (!scrollingLoop) {
scrollingLoop = setInterval(function () {
if (!instances.get(element)) {
clearInterval(scrollingLoop);
return;
}
element.scrollTop = element.scrollTop + scrollDiff.top;
element.scrollLeft = element.scrollLeft + scrollDiff.left;
updateGeometry(element);
}, 50); // every .1 sec
}
}
function stopScrolling() {
if (scrollingLoop) {
clearInterval(scrollingLoop);
scrollingLoop = null;
}
cls.remove(element, 'ps-in-scrolling');
cls.remove(element, 'ps-in-scrolling');
}
var isSelected = false;
i.event.bind(i.ownerDocument, 'selectionchange', function () {
if (element.contains(getRangeNode())) {
isSelected = true;
} else {
isSelected = false;
stopScrolling();
}
});
i.event.bind(window, 'mouseup', function () {
if (isSelected) {
isSelected = false;
stopScrolling();
}
});
i.event.bind(window, 'mousemove', function (e) {
if (isSelected) {
var mousePosition = {x: e.pageX, y: e.pageY};
var containerGeometry = {
left: element.offsetLeft,
right: element.offsetLeft + element.offsetWidth,
top: element.offsetTop,
bottom: element.offsetTop + element.offsetHeight
};
if (mousePosition.x < containerGeometry.left + 3) {
scrollDiff.left = -5;
cls.add(element, 'ps-in-scrolling');
} else if (mousePosition.x > containerGeometry.right - 3) {
scrollDiff.left = 5;
cls.add(element, 'ps-in-scrolling');
} else {
scrollDiff.left = 0;
}
if (mousePosition.y < containerGeometry.top + 3) {
if (containerGeometry.top + 3 - mousePosition.y < 5) {
scrollDiff.top = -5;
} else {
scrollDiff.top = -20;
}
cls.add(element, 'ps-in-scrolling');
} else if (mousePosition.y > containerGeometry.bottom - 3) {
if (mousePosition.y - containerGeometry.bottom + 3 < 5) {
scrollDiff.top = 5;
} else {
scrollDiff.top = 20;
}
cls.add(element, 'ps-in-scrolling');
} else {
scrollDiff.top = 0;
}
if (scrollDiff.top === 0 && scrollDiff.left === 0) {
stopScrolling();
} else {
startScrolling();
}
}
});
}
function bindTouchHandler(supportsTouch, supportsIePointer) {
function applyTouchMove(differenceX, differenceY) {
element.scrollTop = element.scrollTop - differenceY;
element.scrollLeft = element.scrollLeft() - differenceX;
updateGeometry(element);
}
var startOffset = {};
var startTime = 0;
var speed = {};
var easingLoop = null;
var inGlobalTouch = false;
var inLocalTouch = false;
function globalTouchStart() {
inGlobalTouch = true;
}
function globalTouchEnd() {
inGlobalTouch = false;
}
function getTouch(e) {
if (e.targetTouches) {
return e.targetTouches[0];
} else {
// Maybe IE pointer
return e;
}
}
function shouldHandle(e) {
if (e.targetTouches && e.targetTouches.length === 1) {
return true;
}
if (e.pointerType && e.pointerType !== 'mouse' && e.pointerType !== e.MSPOINTER_TYPE_MOUSE) {
return true;
}
return false;
}
function touchStart(e) {
if (shouldHandle(e)) {
inLocalTouch = true;
var touch = getTouch(e);
startOffset.pageX = touch.pageX;
startOffset.pageY = touch.pageY;
startTime = (new Date()).getTime();
if (easingLoop !== null) {
clearInterval(easingLoop);
}
e.stopPropagation();
}
}
function touchMove(e) {
if (!inGlobalTouch && inLocalTouch && shouldHandle(e)) {
var touch = getTouch(e);
var currentOffset = {pageX: touch.pageX, pageY: touch.pageY};
var differenceX = currentOffset.pageX - startOffset.pageX;
var differenceY = currentOffset.pageY - startOffset.pageY;
applyTouchMove(differenceX, differenceY);
startOffset = currentOffset;
var currentTime = (new Date()).getTime();
var timeGap = currentTime - startTime;
if (timeGap > 0) {
speed.x = differenceX / timeGap;
speed.y = differenceY / timeGap;
startTime = currentTime;
}
if (shouldPreventSwipe(differenceX, differenceY)) {
e.stopPropagation();
e.preventDefault();
}
}
}
function touchEnd() {
if (!inGlobalTouch && inLocalTouch) {
inLocalTouch = false;
clearInterval(easingLoop);
easingLoop = setInterval(function () {
if (!instances.get(element)) {
clearInterval(easingLoop);
return;
}
if (Math.abs(speed.x) < 0.01 && Math.abs(speed.y) < 0.01) {
clearInterval(easingLoop);
return;
}
applyTouchMove(speed.x * 30, speed.y * 30);
speed.x *= 0.8;
speed.y *= 0.8;
}, 10);
}
}
if (supportsTouch) {
i.event.bind(window, 'touchstart', globalTouchStart);
i.event.bind(window, 'touchend', globalTouchEnd);
i.event.bind(element, 'touchstart', touchStart);
i.event.bind(element, 'touchmove', touchMove);
i.event.bind(element, 'touchend', touchEnd);
}
if (supportsIePointer) {
if (window.PointerEvent) {
i.event.bind(window, 'pointerdown', globalTouchStart);
i.event.bind(window, 'pointerup', globalTouchEnd);
i.event.bind(element, 'pointerdown', touchStart);
i.event.bind(element, 'pointermove', touchMove);
i.event.bind(element, 'pointerup', touchEnd);
} else if (window.MSPointerEvent) {
i.event.bind(window, 'MSPointerDown', globalTouchStart);
i.event.bind(window, 'MSPointerUp', globalTouchEnd);
i.event.bind(element, 'MSPointerDown', touchStart);
i.event.bind(element, 'MSPointerMove', touchMove);
i.event.bind(element, 'MSPointerUp', touchEnd);
}
}
}
function bindScrollHandler() {
i.event.bind(element, 'scroll', function () {
updateGeometry(element);
});
}
function initialize() {
updateGeometry(element);
bindScrollHandler();
bindMouseScrollXHandler();
bindMouseScrollYHandler();
bindRailClickHandler();
bindSelectionHandler();
bindMouseWheelHandler();
if (h.env.supportsTouch || h.env.supportsIePointer) {
bindTouchHandler(h.env.supportsTouch, h.env.supportsIePointer);
}
if (i.settings.useKeyboard) {
bindKeyboardHandler();
}
}
initialize();
updateGeometry(element);
};