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textfit-div.html
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textfit-div.html
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<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../iron-resizable-behavior/iron-resizable-behavior.html">
<link rel="import" href="../iron-flex-layout/iron-flex-layout-classes.html">
<link rel="import" href="../shadycss/apply-shim.html">
<script src="../textfit/textFit.js"></script>
<!--
### Example:
<div class="layout horizontal flex wrap">
<div class="horizontal-section layout horizontal flex">
<textfit-div class="fullHeight flex" horizontal-center vertical-center text="Hey!"></textfit-div>
</div>
<div class="horizontal-section layout horizontal flex">
<textfit-div class="fullHeight flex" text="Good Evening!"></textfit-div>
</div>
</div>
Custom property | Description | Default
----------------|---------------------------|----------
`--textfit-div` | Mixin applied to the text | `{}`
@element textfit-div
@demo demo/index.html
-->
<dom-module id="textfit-div">
<template>
<style is="custom-style">
:host {
@apply --layout-vertical;
@apply --textfit-div;
}
.fullHeight {
@apply --layout-flex;
@apply --textfit-div;
}
div > span {
@apply --textfit-div;
}
</style>
<div id="fitMe" class="fullHeight">{{text}}</div>
</template>
<script>
Polymer({
is: 'textfit-div',
behaviors: [
Polymer.IronResizableBehavior
],
properties: {
/**
* The text that will be displayed and fit into its container.
*
* @attribute text
* @type String
* @default ''
*/
text: {
observer: '_textChanged',
type: String,
value: ''
},
/**
* Tracks the attachment status of the textfit-div element.
*
* @attribute isAttached
* @type Boolean
* @default false
*/
isAttached: {
type: Boolean,
value: false
},
/**
* When set to true the content will be centered horizontally.
*
* @attribute horizontalCenter
* @type Boolean
* @default false
*/
horizontalCenter: {
type: Boolean,
value: false
},
/**
* When set to true the content will be centered vertically.
*
* @attribute verticalCenter
* @type Boolean
* @default false
*/
verticalCenter: {
type: Boolean,
value: false
},
/**
* When set to true, textfit's multiline detection will be explicitly turned on.
*
* @attribute multiLine
* @type Boolean
* @default false
*/
multiLine: {
type: Boolean,
value: false
},
/**
* If your text has multiple lines, textFit() will automatically detect that and disable white-space: no-wrap! No changes are necessary.
*
* @attribute detectMultiLine
* @type Boolean
* @default true
*/
detectMultiLine: {
type: Boolean,
value: true
},
/**
* Minimum font-size for textfit. If set the calculated font-size will not be set below the defined value.
*
* @attribute minFontSize
* @type Number
* @default 6
*/
minFontSize: {
type: Number,
value: 6
},
/**
* Maximum font-size for textfit. If set the calculated font-size will not be set above the defined value.
*
* @attribute maxFontSize
* @type Number
* @default 200
*/
maxFontSize: {
type: Number,
value: 200
},
/**
* If true, textFit will re-process already-fit nodes. Set to 'false' for better performance
*
* @attribute reProcess
* @type Boolean
* @default true
*/
reProcess: {
type: Boolean,
value: true
},
/**
* If true, textFit will fit text to element width, regardless of text height
*
* @attribute widthOnly
* @type Boolean
* @default false
*/
widthOnly: {
type: Boolean,
value: false
},
/**
* If set to true, textfit-div will not automatically recalculate the font-size when a resize event is fired or the text content is changed.
* doFitMe() must be called manually to trigger a recalculation.
*
* @attribute manualFire
* @type Boolean
* @default false
*/
manualFire: {
type: Boolean,
value: false
},
/**
* If true, textFit will use flexbox for vertical alignment
*
* @attribute manualFire
* @type Boolean
* @default false
*/
alignVertWithFlexbox: {
type: Boolean,
value: false
}
},
listeners: {
'iron-resize': '_onIronResize'
},
/**
* Triggered when the textfit-div element is attached.
* Initial textfit calculation is triggered.
*/
attached: function () {
this.isAttached = true;
if (this.manualFire)
return;
// Below we run async because there is a known bug with polymer attached callback and clientWidth parameter used in textFit plugin
this.async(this.doFitMe);
},
detached: function () {
this.isAttached = false;
},
/**
* Observer method that is triggered when text content changed.
*/
_textChanged: function (newText, oldText) {
if (newText !== oldText && !this.manualFire) {
var span = this.shadowRoot.querySelector('.textFitted');
if (span) {
span.innerHTML = newText;
}
this.async(this.doFitMe);
}
},
/**
* Triggered on iron-resize event.
*/
_onIronResize: function () {
if (this.manualFire)
return;
this.async(this.doFitMe);
},
/**
* Calls textfit to trigger font-size recalculation.
*/
doFitMe: function () {
if (!this.isAttached)
return;
if (this.$.fitMe.innerHTML.length < 1)
return;
if (this.$.fitMe.clientHeight <= 0 || this.$.fitMe.clientWidth <= 0) {
console.debug('textfit-div has no size yet, therefore the text can not be fitted.');
return;
}
try {
textFit(this.$.fitMe, {
alignHoriz: this.horizontalCenter,
alignVert: this.verticalCenter,
multiLine: this.multiLine,
detectMultiLine: this.detectMultiLine,
minFontSize: this.minFontSize,
maxFontSize: this.maxFontSize,
reProcess: this.reProcess,
widthOnly: this.widthOnly,
alignVertWithFlexbox: this.alignVertWithFlexbox
});
} catch (e) {
console.warn(e);
}
}
});
</script>
</dom-module>