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<!DOCTYPE html>
<!--
Copyright 2015 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<link rel='import' href='/tracing/ui/base/constants.html'>
<dom-module id='tr-ui-heading'>
<template>
<style>
:host {
background-color: rgb(243, 245, 247);
border-right: 1px solid #8e8e8e;
display: block;
height: 100%;
margin: 0;
padding: 0 5px 0 0;
}
heading {
display: block;
overflow-x: hidden;
text-align: left;
text-overflow: ellipsis;
white-space: nowrap;
}
#arrow {
-webkit-flex: 0 0 auto;
font-family: sans-serif;
margin-left: 5px;
margin-right: 5px;
width: 8px;
}
#link, #heading_content {
display: none;
}
</style>
<heading id='heading' on-click='onHeadingDivClicked_'>
<span id='arrow'></span>
<span id='heading_content'></span>
<tr-ui-a-analysis-link id='link'></tr-ui-a-analysis-link>
</heading>
</template>
</dom-module>
<script>
'use strict';
Polymer({
is: 'tr-ui-heading',
DOWN_ARROW: String.fromCharCode(0x25BE),
RIGHT_ARROW: String.fromCharCode(0x25B8),
ready: function(viewport) {
// Minus 6 === 1px border + 5px padding right.
this.style.width = (tr.ui.b.constants.HEADING_WIDTH - 6) + 'px';
this.heading_ = '';
this.expanded_ = true;
this.arrowVisible_ = false;
this.selectionGenerator_ = undefined;
this.updateContents_();
},
get heading() {
return this.heading_;
},
set heading(text) {
if (this.heading_ === text)
return;
this.heading_ = text;
this.updateContents_();
},
set arrowVisible(val) {
if (this.arrowVisible_ === val)
return;
this.arrowVisible_ = !!val;
this.updateContents_();
},
set tooltip(text) {
this.$.heading.title = text;
},
set selectionGenerator(generator) {
if (this.selectionGenerator_ === generator)
return;
this.selectionGenerator_ = generator;
this.updateContents_();
},
get expanded() {
return this.expanded_;
},
set expanded(expanded) {
if (this.expanded_ === expanded)
return;
this.expanded_ = !!expanded;
this.updateContents_();
},
onHeadingDivClicked_: function() {
this.dispatchEvent(new tr.b.Event('heading-clicked', true));
},
updateContents_: function() {
if (this.arrowVisible_) {
this.$.arrow.style.display = '';
} else {
this.$.arrow.style.display = 'none';
this.$.heading.style.display = this.expanded_ ? '' : 'none';
}
if (this.arrowVisible_) {
Polymer.dom(this.$.arrow).textContent =
this.expanded_ ? this.DOWN_ARROW : this.RIGHT_ARROW;
}
this.$.link.style.display = 'none';
this.$.heading_content.style.display = 'none';
if (this.selectionGenerator_) {
this.$.link.style.display = 'inline-block';
this.$.link.selection = this.selectionGenerator_;
Polymer.dom(this.$.link).textContent = this.heading_;
} else {
this.$.heading_content.style.display = 'inline-block';
Polymer.dom(this.$.heading_content).textContent = this.heading_;
}
}
});
</script>
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