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Unified Diff: pkg/polymer/lib/elements/polymer-file/polymer-file.html

Issue 175443005: [polymer] import all elements (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: updated from bower Created 6 years, 10 months ago
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Index: pkg/polymer/lib/elements/polymer-file/polymer-file.html
diff --git a/pkg/polymer/lib/elements/polymer-file/polymer-file.html b/pkg/polymer/lib/elements/polymer-file/polymer-file.html
new file mode 100644
index 0000000000000000000000000000000000000000..8dca5f1d35c2874854133dad3e606bd51f7c46dc
--- /dev/null
+++ b/pkg/polymer/lib/elements/polymer-file/polymer-file.html
@@ -0,0 +1,141 @@
+<!--
+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-file provides File API operations.
+ *
+ * Examples:
+ *
+ * <polymer-file id="file" readas="dataurl"
+ * on-polymer-result="{{handleResult}}"></polymer-file>
+ * ...
+ * this.$.file.blob = new Blob(['abc'], {type: 'text/plain'});
+ * this.$.file.read();
+ *
+ * ---
+ *
+ * <polymer-file id="file" readas="arraybuffer" auto
+ * result="{{result}}"></polymer-file>
+ * ...
+ * this.$.file.blob = new Blob(['abc'], {type: 'text/plain'});
+ *
+ * @class polymer-file
+ */
+/**
+ * Fired when a file read has complete.
+ *
+ * @event polymer-result
+ * @param {Object} detail
+ * @param {Object} detail.result The result of the read.
+ */
+/**
+ * Fired if there is an error in the file read.
+ *
+ * @event polymer-error
+ * @param {Object} detail
+ * @param {Object} detail.error Information on the error.
+ *
+ */
+-->
+<link rel="import" href="../polymer/polymer.html">
+
+<polymer-element name="polymer-file" attributes="blob result auto readas">
+<template>
+ <style>
+ :host {
+ display: none;
+ }
+ </style>
+</template>
+<script>
+Polymer('polymer-file', {
+ /**
+ * Contains the result of a read operation.
+ *
+ * @attribute result
+ * @type Blob|File
+ * @default null
+ */
+ result: null,
+ /**
+ * The Blob-like object to read.
+ *
+ * @attribute blob
+ * @type Blob|File
+ * @default null
+ */
+ blob: null,
+ /**
+ * If true, automatically performs the file read (if a blob has been set).
+ *
+ * @attribute auto
+ * @type boolean
+ * @default false
+ */
+ auto: false,
+ /**
+ * The format the result should be returned as. One of 'arraybuffer', 'text',
+ * 'dataurl', 'binarystring'.
+ *
+ * @attribute readas
+ * @type string
+ * @default 'text'
+ */
+ readas: 'text',
+ blobChanged: function() {
+ // result is set at end of microtask in read. This won't call resultChanged.
+ this.result = null;
+ if (this.auto) {
+ this.read();
+ }
+ },
+ resultChanged: function() {
+ this.fire('polymer-result', {result: this.result});
+ },
+ read: function() {
+ // Send back same result if blob hasn't changed.
+ if (this.result || !this.blob) {
+ // Wrap in asyncMethod for situations where read() is called immediately.
+ this.asyncMethod(function() {
+ this.fire('polymer-result', {result: this.result});
+ });
+ return;
+ }
+
+ // TODO: reader.abort() a in-flight read.
+ var reader = new FileReader();
+ reader.onload = function(e) {
+ this.result = e.target.result;
+ }.bind(this);
+ reader.onerror = function(e) {
+ this.fire('polymer-error', {error: e.target.error});
+ }.bind(this);
+
+ switch(this.readas) {
+ case 'dataurl':
+ reader.readAsDataURL(this.blob);
+ break;
+ case 'arraybuffer':
+ reader.readAsArrayBuffer(this.blob);
+ break;
+ case 'binarystring':
+ reader.readAsBinaryString(this.blob);
+ break;
+ case 'text':
+ // Default to text.
+ default:
+ reader.readAsText(this.blob);
+ break;
+ }
+ }
+});
+</script>
+</polymer-element>
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