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| 1 <!-- Copyright (c) 2014 The Chromium Authors. All rights reserved. | |
| 2 Use of this source code is governed by a BSD-style license that can be | |
| 3 found in the LICENSE file. --> | |
| 4 | |
| 5 <!-- | |
| 6 Use to add keyboard shortcuts to your components. The last inserted componen
t | |
| 7 will always receive the events (and others will not). This prevents the | |
| 8 common bug where you have two listeners and multiple actions are taken for | |
| 9 the same keyboard shortcut. | |
| 10 | |
| 11 <cr-keyboard | |
| 12 on-key-j="{{ forward }}" | |
| 13 on-key-k="{{ backwards }}" | |
| 14 on-key-delete="{{ remove }}"></cr-keyboard> | |
| 15 | |
| 16 or | |
| 17 | |
| 18 keyboard.addEventListener("key-left", previousSlide); | |
| 19 keyboard.addEventListener("key-right", nextSlide); | |
| 20 | |
| 21 The "global" attribute configures this keyboard listener to be a global key | |
| 22 binding which means the <cr-keyboard> instances is assumed to exist all the | |
| 23 time but only apply when a non-editable element is focused and no dialogs | |
| 24 are open. | |
| 25 --> | |
| 26 <polymer-element name="cr-keyboard" attributes="global"> | |
| 27 <template> | |
| 28 <style> | |
| 29 :host { display: none; } | |
| 30 </style> | |
| 31 </template> | |
| 32 <script> | |
| 33 (function() { | |
| 34 var instances = []; | |
| 35 | |
| 36 // TODO(esprehn): Remove once M35 is stable. | |
| 37 var globalSupported = !navigator.userAgent.contains("Chrome/35."); | |
| 38 | |
| 39 Polymer("cr-keyboard", { | |
| 40 created: function() { | |
| 41 this.global = false; | |
| 42 }, | |
| 43 attached: function() { | |
| 44 instances.unshift(this); | |
| 45 }, | |
| 46 detached: function() { | |
| 47 var i = instances.indexOf(this); | |
| 48 if (i >= 0) | |
| 49 instances.splice(i, 1); | |
| 50 }, | |
| 51 isActive: function() { | |
| 52 if (!this.global) | |
| 53 return true; | |
| 54 if (!globalSupported) | |
| 55 return false; | |
| 56 // TODO(esprehn): This doesn't support contenteditable, but we d
on't use | |
| 57 // that yet so there's no need to add the complexity. | |
| 58 var activeElement = document.querySelector("* /deep/ :focus"); | |
| 59 if (activeElement && (activeElement.tagName == "INPUT" || active
Element.tagName == "TEXTAREA")) | |
| 60 return false; | |
| 61 var activeDialog = document.querySelector("* /deep/ dialog[open]
"); | |
| 62 if (activeDialog) | |
| 63 return activeDialog.contains(this); | |
| 64 return true; | |
| 65 }, | |
| 66 }); | |
| 67 | |
| 68 var KEY_CODES = { | |
| 69 8: "delete", | |
| 70 9: "tab", | |
| 71 20: "space", | |
| 72 27: "escape", | |
| 73 }; | |
| 74 | |
| 75 var KEY_NAMES = { | |
| 76 "!": "exclamation", | |
| 77 "@": "at", | |
| 78 "#": "pound", | |
| 79 "$": "dollar", | |
| 80 "%": "percent", | |
| 81 "^": "caret", | |
| 82 "&": "amp", | |
| 83 "*": "asterisk", | |
| 84 "(": "open-paren", | |
| 85 ")": "close-paren", | |
| 86 "-": "dash", | |
| 87 "_": "underscore", | |
| 88 "+": "plus", | |
| 89 "=": "equals", | |
| 90 "{": "open-brace", | |
| 91 "}": "close-brace", | |
| 92 "[": "open-bracket", | |
| 93 "]": "close-bracket", | |
| 94 "|": "pipe", | |
| 95 "\\": "backslash", | |
| 96 "\"": "double-quote", | |
| 97 "'": "single-quote", | |
| 98 ";": "semi-colon", | |
| 99 ":": "colon", | |
| 100 "?": "question-mark", | |
| 101 "/": "forward-slash", | |
| 102 ">": "greater-than", | |
| 103 ".": "period", | |
| 104 "<": "less-than", | |
| 105 "`": "backtick", | |
| 106 "~": "tilde", | |
| 107 }; | |
| 108 | |
| 109 function convertKey(event) { | |
| 110 var key = event.keyIdentifier || event.key; | |
| 111 if (key.indexOf("U+") != -1) { | |
| 112 var code = parseInt(key.replace("U+", "0x"), 16); | |
| 113 var chr = String.fromCharCode(code).toLowerCase() | |
| 114 if (KEY_CODES[code]) | |
| 115 return KEY_CODES[code]; | |
| 116 if (KEY_NAMES[chr]) | |
| 117 return KEY_NAMES[chr]; | |
| 118 return chr; | |
| 119 } | |
| 120 if (KEY_NAMES[key]) | |
| 121 return KEY_NAMES[key]; | |
| 122 return key.toLowerCase(); | |
| 123 } | |
| 124 | |
| 125 function handleKeyDown(event) { | |
| 126 var key = convertKey(event); | |
| 127 if (!key) | |
| 128 return; | |
| 129 var instance = instances.find(function(instance) { | |
| 130 return instance.isActive() && instance.hasAttribute("on-key-" +
key); | |
| 131 }); | |
| 132 if (instance && instance.fire("key-" + key, event).defaultPrevented) | |
| 133 event.preventDefault(); | |
| 134 } | |
| 135 | |
| 136 window.addEventListener("keydown", handleKeyDown); | |
| 137 })(); | |
| 138 </script> | |
| 139 </polymer-element> | |
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Chromium Code Reviews
Issue 1001723003:
Create a common directory of widgets and css. (Closed)
Base URL: https://chromium.googlesource.com/infra/infra.git@master