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b6f511c6a9
This CL updates sky-box, sky-button, sky-checkbox, sky-input, and sky-radio to work in Dart. We don't have a data binding system yet, so there's a bit more plumbing in the code. This CL adds support for sky-element@attributes, which lets you specify which attributes your element supports. We use this information to synthesize getters and setters for those attributes and to dispatch to mumbleChanged methods when the attributes change. I've also wrapped the widgets demo itself in a sky-scrollable so the whole thing scrolls. R=eseidel@chromium.org Review URL: https://codereview.chromium.org/946813005
100 lines
2.7 KiB
Plaintext
100 lines
2.7 KiB
Plaintext
<!--
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// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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-->
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<script>
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import "dart:sky";
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final kEntityMap = new Map.fromIterable([
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['\u00a0', ' '],
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['&', '&'],
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['<', '<'],
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['>', '>'],
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['"', '"'],
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], key: (item) => item[0], value: (item) => item[1]);
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final RegExp kTextEscapePattern = new RegExp(r'&|<|>|"|\u00a0');
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final RegExp kAttributeEscapePattern = new RegExp(r'&|>|"|\u00a0');
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const kIndent = ' ';
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String escapeText(String value, RegExp pattern) {
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if (value == null)
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value = '';
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return value.replaceAllMapped(pattern, (Match match) {
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return kEntityMap[match[0]];
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});
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}
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String serializeAttributes(Element element) {
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String buffer = '';
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var attributes = element.getAttributes();
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for (var i = 0; i < attributes.length; ++i) {
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var attribute = attributes[i];
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buffer += ' ';
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buffer += attribute.name;
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buffer += '="';
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buffer += escapeText(attribute.value, kAttributeEscapePattern);
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buffer += '"';
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}
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return buffer;
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}
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Node getFirstChild(Node node) {
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if (node is HTMLTemplateElement)
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return node.content.firstChild;
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return node.firstChild;
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}
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Node getLastChild(Node node) {
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if (node is HTMLTemplateElement)
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return node.content.lastChild;
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return node.lastChild;
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}
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String serializeChildren(Node node, int depth) {
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String buffer = '';
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Node firstChild = getFirstChild(node);
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Node lastChild = getLastChild(node);
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if (firstChild is Element && depth != 0)
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buffer += '\n' + (kIndent * depth);
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for (Node child = firstChild; child != null; child = child.nextSibling) {
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buffer += serializeNode(child, depth);
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if (child is Element && child.nextSibling is Element)
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buffer += '\n' + (kIndent * depth);
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}
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if (lastChild is Element) {
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buffer += '\n';
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if (depth != 0)
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buffer += kIndent * (depth - 1);
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}
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return buffer;
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}
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String serializeElement(Element element, int depth) {
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String buffer = '<' + element.tagName + serializeAttributes(element) + '>';
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buffer += serializeChildren(element, depth + 1);
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buffer += '</' + element.tagName + '>';
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return buffer;
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}
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String serializeText(Node node) {
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Node parent = node.parentNode;
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if (parent != null && (parent is HTMLScriptElement || parent is HTMLStyleElement))
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return node.data;
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return escapeText(node.data, kTextEscapePattern);
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}
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String serializeNode(Node node, [int depth = 0]) {
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if (node is Text)
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return serializeText(node);
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if (node is Element)
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return serializeElement(node, depth);
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if (node is Document || node is ShadowRoot)
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return serializeChildren(node, depth);
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throw new Error('Cannot serialize node');
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}
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</script>
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