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inbox_app.html
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<!doctype html>
<!--
Copyright 2013 The Polymer Authors. All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file.
-->
<html>
<head>
<title>app-widgets</title>
<script>// Copyright (c) 2012 The Polymer Authors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//# sourceMappingURL=polymer.js.map</script>
<!-- <link rel="import" href="../polymer-dev/polymer.html"> -->
<!DOCTYPE html>
<script>"use strict";
(function(exports) {
function sign(number) {
if (number < 0)
return -1;
if (number > 0)
return 1;
return 0;
}
function Animator(delegate) {
this.delegate = delegate;
this.startTimeStamp = 0;
this.request_ = null;
};
Animator.prototype.scheduleAnimation = function() {
if (this.request_)
return;
this.request_ = requestAnimationFrame(this.onAnimation_.bind(this));
};
Animator.prototype.startAnimation = function() {
this.startTimeStamp = 0;
this.scheduleAnimation();
};
Animator.prototype.stopAnimation = function() {
cancelAnimationFrame(this.request_);
this.startTimeStamp = 0;
this.request_ = null;
};
Animator.prototype.onAnimation_ = function(timeStamp) {
this.request_ = null;
if (!this.startTimeStamp)
this.startTimeStamp = timeStamp;
if (this.delegate.onAnimation(timeStamp))
this.scheduleAnimation();
};
function VelocityTracker() {
this.recentTouchMoves_ = [];
this.velocityX = 0;
this.velocityY = 0;
}
VelocityTracker.kTimeWindow = 50;
VelocityTracker.prototype.pruneHistory_ = function(timeStamp) {
for (var i = 0; i < this.recentTouchMoves_.length; ++i) {
if (this.recentTouchMoves_[i].timeStamp > timeStamp - VelocityTracker.kTimeWindow) {
this.recentTouchMoves_ = this.recentTouchMoves_.slice(i);
return;
}
}
// All touchmoves are old.
this.recentTouchMoves_ = [];
};
VelocityTracker.prototype.update_ = function(e) {
this.pruneHistory_(e.timeStamp);
this.recentTouchMoves_.push(e);
var oldestTouchMove = this.recentTouchMoves_[0];
var deltaX = e.changedTouches[0].clientX - oldestTouchMove.changedTouches[0].clientX;
var deltaY = e.changedTouches[0].clientY - oldestTouchMove.changedTouches[0].clientY;
var deltaT = e.timeStamp - oldestTouchMove.timeStamp;
if (deltaT > 0) {
this.velocityX = deltaX / deltaT;
this.velocityY = deltaY / deltaT;
} else {
this.velocityX = 0;
this.velocityY = 0;
}
};
VelocityTracker.prototype.onTouchStart = function(e) {
this.recentTouchMoves_.push(e);
this.velocityX = 0;
this.velocityY = 0;
};
VelocityTracker.prototype.onTouchMove = function(e) {
this.update_(e);
};
VelocityTracker.prototype.onTouchEnd = function(e) {
this.update_(e);
this.recentTouchMoves_ = [];
};
function LinearTimingFunction() {
};
LinearTimingFunction.prototype.scaleTime = function(fraction) {
return fraction;
};
function CubicBezierTimingFunction(spec) {
this.map = [];
for (var ii = 0; ii <= 100; ii += 1) {
var i = ii / 100;
this.map.push([
3 * i * (1 - i) * (1 - i) * spec[0] +
3 * i * i * (1 - i) * spec[2] + i * i * i,
3 * i * (1 - i) * (1 - i) * spec[1] +
3 * i * i * (1 - i) * spec[3] + i * i * i
]);
}
};
CubicBezierTimingFunction.prototype.scaleTime = function(fraction) {
var fst = 0;
while (fst !== 100 && fraction > this.map[fst][0]) {
fst += 1;
}
if (fraction === this.map[fst][0] || fst === 0) {
return this.map[fst][1];
}
var yDiff = this.map[fst][1] - this.map[fst - 1][1];
var xDiff = this.map[fst][0] - this.map[fst - 1][0];
var p = (fraction - this.map[fst - 1][0]) / xDiff;
return this.map[fst - 1][1] + p * yDiff;
};
var presetTimingFunctions = {
'linear': new LinearTimingFunction(),
'ease': new CubicBezierTimingFunction([0.25, 0.1, 0.25, 1.0]),
'ease-in': new CubicBezierTimingFunction([0.42, 0, 1.0, 1.0]),
'ease-out': new CubicBezierTimingFunction([0, 0, 0.58, 1.0]),
'ease-in-out': new CubicBezierTimingFunction([0.42, 0, 0.58, 1.0]),
};
function DrawerController(options) {
this.velocityTracker = new VelocityTracker();
this.animator = new Animator(this);
this.target = options.target;
this.left = options.left;
this.right = options.right;
this.position = options.position;
this.width = this.right - this.left;
this.curve = presetTimingFunctions[options.curve || 'linear'];
this.willOpenCallback = options.willOpen;
this.didCloseCallback = options.didClose;
this.animateCallback = options.onAnimate;
this.state = DrawerController.kClosed;
this.defaultAnimationSpeed = (this.right - this.left) / DrawerController.kBaseSettleDurationMS;
this.onTouchMove = this.onTouchMove.bind(this);
this.onTouchEnd = this.onTouchEnd.bind(this);
this.target.addEventListener('touchstart', this.onTouchStart.bind(this));
}
DrawerController.kOpened = 'opened';
DrawerController.kClosed = 'closed';
DrawerController.kOpening = 'opening';
DrawerController.kClosing = 'closing';
DrawerController.kDragging = 'dragging';
DrawerController.kFlinging = 'flinging';
DrawerController.kBaseSettleDurationMS = 246;
DrawerController.kMaxSettleDurationMS = 600;
DrawerController.kMinFlingVelocity = 0.4; // Matches Android framework.
DrawerController.kTouchSlop = 5; // Matches Android framework.
DrawerController.kTouchSlopSquare = DrawerController.kTouchSlop * DrawerController.kTouchSlop;
DrawerController.prototype.restrictToCurrent = function(offset) {
return Math.max(this.left, Math.min(this.position, offset));
};
DrawerController.prototype.restrictToBounds = function(offset) {
return Math.max(this.left, Math.min(this.right, offset));
};
DrawerController.prototype.onTouchStart = function(e) {
this.velocityTracker.onTouchStart(e);
var touchX = e.changedTouches[0].clientX;
var touchY = e.changedTouches[0].clientY;
if (this.state != DrawerController.kOpened) {
if (touchX != this.restrictToCurrent(touchX))
return;
this.state = DrawerController.kDragging;
}
this.animator.stopAnimation();
this.target.addEventListener('touchmove', this.onTouchMove);
this.target.addEventListener('touchend', this.onTouchEnd);
// TODO(abarth): Handle touchcancel.
this.startX = touchX;
this.startY = touchY;
this.startPosition = this.position;
this.touchBaseX = Math.min(touchX, this.startPosition);
};
DrawerController.prototype.onTouchMove = function(e) {
this.velocityTracker.onTouchMove(e);
if (this.state == DrawerController.kOpened) {
var deltaX = e.changedTouches[0].clientX - this.startX;
var deltaY = e.changedTouches[0].clientY - this.startY;
if (deltaX * deltaX + deltaY * deltaY < DrawerController.kTouchSlopSquare) {
e.preventDefault();
return;
}
if (Math.abs(deltaY) > Math.abs(deltaX)) {
this.target.removeEventListener('touchmove', this.onTouchMove);
this.target.removeEventListener('touchend', this.onTouchEnd);
return;
}
this.state = DrawerController.kDragging;
}
e.preventDefault();
var touchDeltaX = e.changedTouches[0].clientX - this.touchBaseX;
this.position = this.restrictToBounds(this.startPosition + touchDeltaX);
this.animator.scheduleAnimation();
};
DrawerController.prototype.onTouchEnd = function(e) {
this.velocityTracker.onTouchEnd(e);
this.target.removeEventListener('touchmove', this.onTouchMove);
this.target.removeEventListener('touchend', this.onTouchEnd);
var velocityX = this.velocityTracker.velocityX;
if (Math.abs(velocityX) > DrawerController.kMinFlingVelocity) {
this.fling(velocityX);
} else if (this.isOpen()) {
this.open();
} else {
this.close();
}
};
DrawerController.prototype.openFraction = function() {
var width = this.right - this.left;
var offset = this.position - this.left;
return offset / width;
};
DrawerController.prototype.isOpen = function() {
return this.openFraction() >= 0.5;
};
DrawerController.prototype.isOpening = function() {
return this.state == DrawerController.kOpening ||
(this.state == DrawerController.kFlinging && this.animationVelocityX > 0);
}
DrawerController.prototype.isClosing = function() {
return this.state == DrawerController.kClosing ||
(this.state == DrawerController.kFlinging && this.animationVelocityX < 0);
}
DrawerController.prototype.toggle = function() {
if (this.isOpen())
this.close();
else
this.open();
};
DrawerController.prototype.open = function() {
if (!this.position)
this.willOpenCallback.call(this.target);
this.animator.stopAnimation();
this.animationDuration = 400;
this.state = DrawerController.kOpening;
this.animate();
};
DrawerController.prototype.close = function() {
this.animator.stopAnimation();
this.animationDuration = 400;
this.state = DrawerController.kClosing;
this.animate();
};
DrawerController.prototype.fling = function(velocityX) {
this.animator.stopAnimation();
this.animationVelocityX = velocityX;
this.state = DrawerController.kFlinging;
this.animate();
};
DrawerController.prototype.animate = function() {
this.positionAnimationBase = this.position;
this.animator.startAnimation();
};
DrawerController.prototype.targetPosition = function(deltaT) {
if (this.state == DrawerController.kFlinging)
return this.positionAnimationBase + this.animationVelocityX * deltaT;
var targetFraction = this.curve.scaleTime(deltaT / this.animationDuration);
var animationWidth = this.state == DrawerController.kOpening ?
this.width - this.positionAnimationBase : -this.positionAnimationBase;
return this.positionAnimationBase + targetFraction * animationWidth;
};
DrawerController.prototype.onAnimation = function(timeStamp) {
if (this.state == DrawerController.kDragging) {
this.animateCallback.call(this.target, this.position);
return false;
}
var deltaT = timeStamp - this.animator.startTimeStamp;
var targetPosition = this.targetPosition(deltaT);
this.position = this.restrictToBounds(targetPosition);
this.animateCallback.call(this.target, this.position);
if (targetPosition <= this.left && this.isClosing()) {
this.state = DrawerController.kClosed;
this.didCloseCallback.call(this.target);
return false;
}
if (targetPosition >= this.right && this.isOpening()) {
this.state = DrawerController.kOpened;
return false;
}
return true;
};
function DismissController(options) {
this.velocityTracker = new VelocityTracker();
this.animator = new Animator(this);
this.target = options.target;
this.moveCallback = options.onMove;
this.dismissCallback = options.onDismiss;
this.curve = presetTimingFunctions[options.curve || 'linear'];
this.position = 0;
this.width = 0;
this.state = DismissController.kInitial;
this.target.addEventListener('touchstart', this.onTouchStart.bind(this));
this.target.addEventListener('touchmove', this.onTouchMove.bind(this));
this.target.addEventListener('touchend', this.onTouchEnd.bind(this));
// TODO(abarth): Handle touchcancel.
}
DismissController.kInitial = 'initial';
DismissController.kDragging = 'dragging';
DismissController.kSettling = 'settling';
DismissController.kFlinging = 'flinging';
DismissController.kDismissed = 'dismissed';
DismissController.prototype.onTouchStart = function(e) {
this.velocityTracker.onTouchStart(e);
this.state = DismissController.kInitial;
this.animator.stopAnimation();
this.startX = e.changedTouches[0].clientX;
this.startY = e.changedTouches[0].clientY;
this.startPosition = this.position;
};
DismissController.prototype.onTouchMove = function(e) {
this.velocityTracker.onTouchMove(e);
if (this.state == DismissController.kInitial) {
var deltaX = e.changedTouches[0].clientX - this.startX;
var deltaY = e.changedTouches[0].clientY - this.startY;
if (deltaX * deltaX + deltaY * deltaY < DrawerController.kTouchSlopSquare) {
e.preventDefault();
return;
}
if (Math.abs(deltaY) > Math.abs(deltaX)) {
this.settleToClosestPosition();
return;
}
this.state = DismissController.kDragging;
this.width = this.target.offsetWidth;
}
if (this.state == DismissController.kDragging) {
e.preventDefault();
var deltaX = e.changedTouches[0].clientX - this.startX;
this.position = this.startPosition + deltaX;
this.animator.scheduleAnimation();
}
};
DismissController.prototype.onTouchEnd = function(e) {
this.velocityTracker.onTouchEnd(e);
if (this.state == DismissController.kDragging) {
var velocityX = this.velocityTracker.velocityX;
if (Math.abs(velocityX) > DrawerController.kMinFlingVelocity) {
this.fling(velocityX);
return;
}
this.settleToClosestPosition();
}
};
DismissController.prototype.settleToClosestPosition = function() {
var fraction = this.position / this.width;
if (fraction > 0.5)
this.settle(this.width);
else if (fraction < -0.5)
this.settle(-this.width);
else
this.settle(0)
};
DismissController.prototype.fling = function(velocityX) {
this.animator.stopAnimation();
this.animationVelocityX = velocityX;
this.basePosition = this.position;
this.state = DismissController.kFlinging;
this.targetPosition = velocityX < 0 ? -this.width : this.width;
this.animator.startAnimation();
};
DismissController.prototype.settle = function(targetPosition) {
this.animator.stopAnimation();
this.animationDuration = DrawerController.kBaseSettleDurationMS;
this.state = DismissController.kSettling;
this.basePosition = this.position;
this.targetPosition = targetPosition;
this.animator.startAnimation();
};
DismissController.prototype.computeTargetPosition = function(deltaT) {
var approximateTargetPosition = 0;
var movingLeftward = false;
if (this.state == DismissController.kSettling) {
var targetFraction = this.curve.scaleTime(deltaT / this.animationDuration);
var animationWidth = this.targetPosition - this.basePosition;
approximateTargetPosition = this.basePosition + targetFraction * animationWidth;
movingLeftward = animationWidth < 0;
} else if (this.state == DismissController.kFlinging) {
approximateTargetPosition = this.basePosition + this.animationVelocityX * deltaT;
movingLeftward = this.animationVelocityX < 0;
}
var lowerBound = -this.width;
var upperBound = this.width;
if (movingLeftward && this.targetPosition == 0)
lowerBound = 0;
else if (!movingLeftward && this.targetPosition == 0)
upperBound = 0;
return Math.max(lowerBound, Math.min(upperBound, approximateTargetPosition));
};
DismissController.prototype.onAnimation = function(timeStamp) {
if (this.state == DismissController.kDragging) {
this.moveCallback.call(this.target, this.position);
return false;
}
var deltaT = timeStamp - this.animator.startTimeStamp;
this.position = this.computeTargetPosition(deltaT);
this.moveCallback.call(this.target, this.position);
if (this.position != this.targetPosition)
return true;
if (this.targetPosition == 0) {
this.state = DismissController.kInitial;
return false;
}
this.state = DismissController.kDismissed;
this.dismissCallback.call(this.target, this.targetPosition < 0 ? 'left' : 'right');
return false;
};
function ScrollAreaToolbarController(options) {
this.animator = new Animator(this);
this.moveCallback = options.onMove;
this.target = options.target;
this.scrollArea = options.scrollArea;
this.scrollArea.addEventListener("scroll", this.onScroll.bind(this));
this.scrollBase = 0;
this.previousScrollTop = 0;
};
ScrollAreaToolbarController.prototype.restrictToBounds = function(position) {
return Math.min(Math.max(position, 0), this.height);
};
ScrollAreaToolbarController.prototype.onScroll = function(e) {
if (!this.height)
this.height = this.target.offsetHeight;
var scrollTop = this.scrollArea.scrollTop;
var scrollDelta = scrollTop - this.scrollBase;
var scrollDeltaFromPrevious = scrollTop - this.previousScrollTop;
this.previousScrollTop = scrollTop;
this.position = this.restrictToBounds(scrollDelta, 0);
if (sign(scrollDelta) != sign(scrollDeltaFromPrevious))
this.scrollBase = scrollTop - this.position;
this.animator.scheduleAnimation();
};
ScrollAreaToolbarController.prototype.onAnimation = function(timeStamp) {
this.moveCallback.call(this.target, this.position);
return false;
};
exports.DrawerController = DrawerController;
exports.DismissController = DismissController;
exports.ScrollAreaToolbarController = ScrollAreaToolbarController;
})(window);
</script>
<style>
html {
height: 100%;
}
body {
display: block;
height: 100%;
margin: 0;
background-color: red;
}
</style>
<polymer-element name="app-frame" assetpath="/">
<template>
<style>
:host {
display: flex;
flex-direction: column;
background-color: white;
height: 100%;
position: relative;
overflow: hidden;
}
</style>
<content></content>
</template>
<script>
Polymer('app-frame', {
});
</script>
</polymer-element>
<polymer-element name="app-column" assetpath="/">
<template>
<style>
:host {
position: relative;
overflow: hidden;
display: flex;
flex-direction: column;
flex: 1;
flex-shrink: 0;
}
:host([scrollable]) {
overflow-y: auto;
}
</style>
<content></content>
</template>
<script>
Polymer('app-column', {
});
</script>
</polymer-element>
<polymer-element name="app-drawer" attributes="active" assetpath="/">
<template>
<style>
#content {
display: none;
position: absolute;
top: 0;
left: 0;
width: 300px;
bottom: 0;
background-color: white;
-webkit-transform: translate3d(0,0,0);
overflow-y: scroll;
}
#mask {
display: none;
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: black;
-webkit-transform: translate3d(0,0,0);
}
</style>
<div id="mask" on-tap="{{ toggle }}"></div>
<div id="content">
<content></content>
</div>
</template>
<script>
Polymer('app-drawer', {
active: false,
toggle: function() {
this.controller.toggle();
},
enteredView: function() {
var content = this.$.content;
var mask = this.$.mask;
this.controller = new DrawerController({
target: this,
left: 0,
right: 300,
position: 0,
curve: 'ease-in-out',
willOpen: function() {
mask.style.display = 'block';
content.style.display = 'block';
this.active = true;
},
didClose: function() {
mask.style.display = 'none';
content.style.display = 'none';
this.active = false;
},
onAnimate: function(position) {
// FIXME: We should animate the opacity from zero, but that triggers http://crbug.com/328106
mask.style.opacity = ((position + 1) / 300) * 0.2;
content.style.WebkitTransform = 'translate3d(' + (position - 300) + 'px,0,0)';
},
});
},
});
</script>
</polymer-element>
<polymer-element name="app-dismissable-item" assetpath="/">
<template>
<style>
:host {
display: block;
-webkit-transform: translate3d(0,0,0);
flex-shrink: 0;
}
</style>
<content></content>
</template>
<script>
Polymer('app-dismissable-item', {
enteredView: function() {
this.controller = new DismissController({
target: this,
curve: 'ease-in-out',
onMove: function(position) {
var width = this.offsetWidth;
this.style.opacity = (width - Math.abs(position)) / width;
this.style.WebkitTransform = 'translate3d(' + position + 'px,0,0)';
},
onDismiss: function(direction) {
this.remove();
},
});
},
});
</script>
</polymer-element>
<polymer-element name="app-scrollarea-toolbar" attributes="location for" assetpath="/">
<template>
<style>
:host {
display: block;
position: absolute;
left: 0;
right: 0;
-webkit-transform: translate3d(0,0,0);
flex-shrink: 0;
}
</style>
<content></content>
</template>
<script>
function findParentTreeScope(node) {
while(node.parentNode)
node = node.parentNode;
return node;
}
Polymer('app-scrollarea-toolbar', {
'for': null,
location: 'top',
enteredView: function() {
if (this.location == 'top')
this.style.top = 0;
else
this.style.bottom = 0;
var scrollArea = findParentTreeScope(this).getElementById(this['for']);
this.controller = new ScrollAreaToolbarController({
target: this,
scrollArea: scrollArea,
onMove: function(position) {
var translateY = this.location == 'top' ? -position : position;
this.style.WebkitTransform = 'translate3d(0,' + translateY +'px,0)';
},
});
},
});
</script>
</polymer-element>
<!--
Copyright 2013 The Polymer Authors. All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file.
-->
<!--
/**
* @module Polymer Elements
*/
-->
<!--
/**
* The polymer-selection element is used to manage selection state. It has no
* visual appearance and is typically used in conjuneciton with another element.
* For example, <a href="polymer-selector.html">polymer-selector</a>
* use a polymer-selection to manage selection.
*
* To mark an item as selected, call the select(item) method on
* polymer-selection. Notice that the item itself is an argument to this method.
* The polymer-selection element manages selection state for any given set of
* items. When an item is selected, the `polymer-select` event is fired.
* The attribute "multi" indicates if multiple items can be selected at once.
*
* Example:
*
* <polymer-element name="selection-example">
* <template>
* <style>
* ::-webkit-distributed(> .selected) {
* font-weight: bold;
* font-style: italic;
* }
* </style>
* <ul on-tap="{{itemTapAction}}">
* <content></content>
* </ul>
* <polymer-selection id="selection" multi on-polymer-select="{{selectAction}}"></polymer-selection>
* </template>
* <script>
* Polymer('selection-example', {
* itemTapAction: function(e) {
* this.$.selection.select(e.target);
* },
* selectAction: function(e, detail) {
* detail.item.classList.toggle('selected', detail.isSelected);
* }
* });
* </script>
* </polymer-element>
*
* <selection-example>
* <li>Red</li>
* <li>Green</li>
* <li>Blue</li>
* </selection-example>
*
* @class polymer-selection
*/
/**
* Fired when an item's selection state is changed. This event is fired both
* when an item is selected or deselected. The `isSelected` detail property
* contains the selection state.
*
* @event polymer-select
* @param {Object} detail
* @param {boolean} detail.isSelected true for selection and false for deselection
* @param {Object} detail.item the item element
*/
-->
<polymer-element name="polymer-selection" attributes="multi" assetpath="bower_components/polymer-selection/">
<template>
<style>
:host {
display: none !important;
}
</style>
</template>
<script>
Polymer('polymer-selection', {
/**
* If true, multiple selections are allowed.
*
* @attribute multi
* @type boolean
* @default false
*/
multi: false,
ready: function() {
this.clear();
},
clear: function() {
this.selection = [];
},
/**
* Retrieves the selected item(s).
* @method getSelection
* @returns Returns the selected item(s). If the multi property is true,
* getSelection will return an array, otherwise it will return
* the selected item or undefined if there is no selection.
*/
getSelection: function() {
return this.multi ? this.selection : this.selection[0];
},
/**
* Indicates if a given item is selected.
* @method isSelected
* @param {any} item The item whose selection state should be checked.
* @returns Returns true if `item` is selected.
*/
isSelected: function(item) {
return this.selection.indexOf(item) >= 0;
},
setItemSelected: function(item, isSelected) {
if (item !== undefined && item !== null) {
if (isSelected) {
this.selection.push(item);
} else {
var i = this.selection.indexOf(item);
if (i >= 0) {
this.selection.splice(i, 1);
}
}
this.fire("polymer-select", {isSelected: isSelected, item: item});
}
},
/**
* Set the selection state for a given `item`. If the multi property
* is true, then the selected state of `item` will be toggled; otherwise
* the `item` will be selected.
* @method select
* @param {any} item: The item to select.
*/
select: function(item) {
if (this.multi) {
this.toggle(item);
} else if (this.getSelection() !== item) {
this.setItemSelected(this.getSelection(), false);
this.setItemSelected(item, true);
}
},
/**
* Toggles the selection state for `item`.
* @method toggle
* @param {any} item: The item to toggle.
*/
toggle: function(item) {
this.setItemSelected(item, !this.isSelected(item));
}
});
</script>
</polymer-element>
<!--
Copyright 2013 The Polymer Authors. All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file.
-->
<!--
/**
* @module Polymer Elements
*/
/**
* polymer-selector is used to manage a list of elements that can be selected.
* The attribute "selected" indicates which item element is being selected.
* The attribute "multi" indicates if multiple items can be selected at once.
* Tapping on the item element would fire "polymer-activate" event. Use
* "polymer-select" event to listen for selection changes.
*
* Example:
*
* <polymer-selector selected="0">
* <div>Item 1</div>
* <div>Item 2</div>
* <div>Item 3</div>
* </polymer-selector>
*
* polymer-selector is not styled. So one needs to use "polymer-selected" CSS
* class to style the selected element.