388 lines
10 KiB
JavaScript
388 lines
10 KiB
JavaScript
/*\
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title: $:/core/modules/keyboard.js
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type: application/javascript
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module-type: global
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Keyboard handling utilities
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var namedKeys = {
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"cancel": 3,
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"help": 6,
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"backspace": 8,
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"tab": 9,
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"clear": 12,
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"return": 13,
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"enter": 13,
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"pause": 19,
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"escape": 27,
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"space": 32,
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"page_up": 33,
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"page_down": 34,
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"end": 35,
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"home": 36,
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"left": 37,
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"up": 38,
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"right": 39,
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"down": 40,
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"printscreen": 44,
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"insert": 45,
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"delete": 46,
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"0": 48,
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"1": 49,
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"2": 50,
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"3": 51,
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"4": 52,
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"5": 53,
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"6": 54,
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"7": 55,
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"8": 56,
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"9": 57,
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"firefoxsemicolon": 59,
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"firefoxequals": 61,
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"a": 65,
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"b": 66,
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"c": 67,
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"d": 68,
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"e": 69,
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"f": 70,
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"g": 71,
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"h": 72,
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"i": 73,
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"j": 74,
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"k": 75,
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"l": 76,
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"m": 77,
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"n": 78,
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"o": 79,
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"p": 80,
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"q": 81,
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"r": 82,
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"s": 83,
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"t": 84,
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"u": 85,
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"v": 86,
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"w": 87,
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"x": 88,
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"y": 89,
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"z": 90,
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"numpad0": 96,
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"numpad1": 97,
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"numpad2": 98,
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"numpad3": 99,
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"numpad4": 100,
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"numpad5": 101,
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"numpad6": 102,
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"numpad7": 103,
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"numpad8": 104,
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"numpad9": 105,
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"multiply": 106,
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"add": 107,
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"separator": 108,
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"subtract": 109,
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"decimal": 110,
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"divide": 111,
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"f1": 112,
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"f2": 113,
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"f3": 114,
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"f4": 115,
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"f5": 116,
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"f6": 117,
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"f7": 118,
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"f8": 119,
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"f9": 120,
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"f10": 121,
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"f11": 122,
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"f12": 123,
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"f13": 124,
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"f14": 125,
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"f15": 126,
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"f16": 127,
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"f17": 128,
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"f18": 129,
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"f19": 130,
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"f20": 131,
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"f21": 132,
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"f22": 133,
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"f23": 134,
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"f24": 135,
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"firefoxminus": 173,
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"semicolon": 186,
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"equals": 187,
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"comma": 188,
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"dash": 189,
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"period": 190,
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"slash": 191,
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"backquote": 192,
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"openbracket": 219,
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"backslash": 220,
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"closebracket": 221,
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"quote": 222
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};
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function KeyboardManager(options) {
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var self = this;
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options = options || "";
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// Save the named key hashmap
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this.namedKeys = namedKeys;
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// Create a reverse mapping of code to keyname
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this.keyNames = [];
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$tw.utils.each(namedKeys,function(keyCode,name) {
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self.keyNames[keyCode] = name.substr(0,1).toUpperCase() + name.substr(1);
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});
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// Save the platform-specific name of the "meta" key
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this.metaKeyName = $tw.platform.isMac ? "cmd-" : "win-";
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this.shortcutKeysList = [], // Stores the shortcut-key descriptors
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this.shortcutActionList = [], // Stores the corresponding action strings
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this.shortcutParsedList = []; // Stores the parsed key descriptors
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this.shortcutPriorityList = []; // Stores the parsed shortcut priority
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this.lookupNames = ["shortcuts"];
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this.lookupNames.push($tw.platform.isMac ? "shortcuts-mac" : "shortcuts-not-mac")
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this.lookupNames.push($tw.platform.isWindows ? "shortcuts-windows" : "shortcuts-not-windows");
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this.lookupNames.push($tw.platform.isLinux ? "shortcuts-linux" : "shortcuts-not-linux");
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this.updateShortcutLists(this.getShortcutTiddlerList());
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$tw.wiki.addEventListener("change",function(changes) {
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self.handleShortcutChanges(changes);
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});
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}
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/*
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Return an array of keycodes for the modifier keys ctrl, shift, alt, meta
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*/
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KeyboardManager.prototype.getModifierKeys = function() {
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return [
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16, // Shift
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17, // Ctrl
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18, // Alt
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20, // CAPS LOCK
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91, // Meta (left)
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93, // Meta (right)
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224 // Meta (Firefox)
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]
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};
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/*
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Parses a key descriptor into the structure:
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{
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keyCode: numeric keycode
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shiftKey: boolean
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altKey: boolean
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ctrlKey: boolean
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metaKey: boolean
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}
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Key descriptors have the following format:
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ctrl+enter
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ctrl+shift+alt+A
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*/
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KeyboardManager.prototype.parseKeyDescriptor = function(keyDescriptor,options) {
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var components = keyDescriptor.split(/\+|\-/),
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info = {
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keyCode: 0,
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shiftKey: false,
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altKey: false,
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ctrlKey: false,
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metaKey: false
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};
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for(var t=0; t<components.length; t++) {
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var s = components[t].toLowerCase(),
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c = s.charCodeAt(0);
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// Look for modifier keys
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if(s === "ctrl") {
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info.ctrlKey = true;
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} else if(s === "shift") {
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info.shiftKey = true;
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} else if(s === "alt") {
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info.altKey = true;
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} else if(s === "meta" || s === "cmd" || s === "win") {
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info.metaKey = true;
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}
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// Replace named keys with their code
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if(this.namedKeys[s]) {
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info.keyCode = this.namedKeys[s];
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}
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}
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if(options.keyDescriptor) {
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info.keyDescriptor = options.keyDescriptor;
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}
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if(info.keyCode) {
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return info;
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} else {
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return null;
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}
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};
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/*
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Parse a list of key descriptors into an array of keyInfo objects. The key descriptors can be passed as an array of strings or a space separated string
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*/
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KeyboardManager.prototype.parseKeyDescriptors = function(keyDescriptors,options) {
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var self = this;
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options = options || {};
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options.stack = options.stack || [];
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var wiki = options.wiki || $tw.wiki;
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if(typeof keyDescriptors === "string" && keyDescriptors === "") {
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return [];
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}
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if(!$tw.utils.isArray(keyDescriptors)) {
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keyDescriptors = keyDescriptors.split(" ");
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}
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var result = [];
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$tw.utils.each(keyDescriptors,function(keyDescriptor) {
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// Look for a named shortcut
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if(keyDescriptor.substr(0,2) === "((" && keyDescriptor.substr(-2,2) === "))") {
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if(options.stack.indexOf(keyDescriptor) === -1) {
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options.stack.push(keyDescriptor);
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var name = keyDescriptor.substring(2,keyDescriptor.length - 2),
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lookupName = function(configName) {
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var keyDescriptors = wiki.getTiddlerText("$:/config/" + configName + "/" + name);
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if(keyDescriptors) {
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options.keyDescriptor = keyDescriptor;
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result.push.apply(result,self.parseKeyDescriptors(keyDescriptors,options));
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}
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};
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$tw.utils.each(self.lookupNames,function(platformDescriptor) {
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lookupName(platformDescriptor);
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});
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}
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} else {
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result.push(self.parseKeyDescriptor(keyDescriptor,options));
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}
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});
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return result;
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};
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KeyboardManager.prototype.getPrintableShortcuts = function(keyInfoArray) {
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var self = this,
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result = [];
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$tw.utils.each(keyInfoArray,function(keyInfo) {
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if(keyInfo) {
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result.push((keyInfo.ctrlKey ? "ctrl-" : "") +
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(keyInfo.shiftKey ? "shift-" : "") +
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(keyInfo.altKey ? "alt-" : "") +
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(keyInfo.metaKey ? self.metaKeyName : "") +
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(self.keyNames[keyInfo.keyCode]));
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}
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});
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return result;
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}
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KeyboardManager.prototype.checkKeyDescriptor = function(event,keyInfo) {
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return keyInfo &&
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event.keyCode === keyInfo.keyCode &&
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event.shiftKey === keyInfo.shiftKey &&
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event.altKey === keyInfo.altKey &&
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event.ctrlKey === keyInfo.ctrlKey &&
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event.metaKey === keyInfo.metaKey;
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};
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KeyboardManager.prototype.checkKeyDescriptors = function(event,keyInfoArray) {
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return (this.getMatchingKeyDescriptor(event,keyInfoArray) !== null);
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};
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KeyboardManager.prototype.getMatchingKeyDescriptor = function(event,keyInfoArray) {
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for(var t=0; t<keyInfoArray.length; t++) {
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if(this.checkKeyDescriptor(event,keyInfoArray[t])) {
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return keyInfoArray[t];
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}
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}
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return null;
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};
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KeyboardManager.prototype.getEventModifierKeyDescriptor = function(event) {
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return event.ctrlKey && !event.shiftKey && !event.altKey && !event.metaKey ? "ctrl" :
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event.shiftKey && !event.ctrlKey && !event.altKey && !event.metaKey ? "shift" :
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event.ctrlKey && event.shiftKey && !event.altKey && !event.metaKey ? "ctrl-shift" :
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event.altKey && !event.shiftKey && !event.ctrlKey && !event.metaKey ? "alt" :
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event.altKey && event.shiftKey && !event.ctrlKey && !event.metaKey ? "alt-shift" :
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event.altKey && event.ctrlKey && !event.shiftKey && !event.metaKey ? "ctrl-alt" :
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event.altKey && event.shiftKey && event.ctrlKey && !event.metaKey ? "ctrl-alt-shift" :
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event.metaKey && !event.ctrlKey && !event.shiftKey && !event.altKey ? "meta" :
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event.metaKey && event.ctrlKey && !event.shiftKey && !event.altKey ? "meta-ctrl" :
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event.metaKey && event.ctrlKey && event.shiftKey && !event.altKey ? "meta-ctrl-shift" :
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event.metaKey && event.ctrlKey && event.shiftKey && event.altKey ? "meta-ctrl-alt-shift" : "normal";
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};
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KeyboardManager.prototype.getShortcutTiddlerList = function() {
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return $tw.wiki.getTiddlersWithTag("$:/tags/KeyboardShortcut");
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};
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KeyboardManager.prototype.updateShortcutLists = function(tiddlerList) {
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this.shortcutTiddlers = tiddlerList;
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for(var i=0; i<tiddlerList.length; i++) {
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var title = tiddlerList[i],
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tiddlerFields = $tw.wiki.getTiddler(title).fields;
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this.shortcutKeysList[i] = tiddlerFields.key !== undefined ? tiddlerFields.key : undefined;
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this.shortcutActionList[i] = tiddlerFields.text;
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this.shortcutParsedList[i] = this.shortcutKeysList[i] !== undefined ? this.parseKeyDescriptors(this.shortcutKeysList[i]) : undefined;
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this.shortcutPriorityList[i] = tiddlerFields.priority === "yes" ? true : false;
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}
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};
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/*
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event: the keyboard event object
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options:
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onlyPriority: true if only priority global shortcuts should be invoked
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*/
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KeyboardManager.prototype.handleKeydownEvent = function(event, options) {
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options = options || {};
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var key, action;
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for(var i=0; i<this.shortcutTiddlers.length; i++) {
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if(options.onlyPriority && this.shortcutPriorityList[i] !== true) {
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continue;
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}
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if(this.shortcutParsedList[i] !== undefined && this.checkKeyDescriptors(event,this.shortcutParsedList[i])) {
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key = this.shortcutParsedList[i];
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action = this.shortcutActionList[i];
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}
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}
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if(key !== undefined) {
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event.preventDefault();
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event.stopPropagation();
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$tw.rootWidget.invokeActionString(action,$tw.rootWidget,event);
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return true;
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}
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return false;
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};
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KeyboardManager.prototype.detectNewShortcuts = function(changedTiddlers) {
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var shortcutConfigTiddlers = [],
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handled = false;
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$tw.utils.each(this.lookupNames,function(platformDescriptor) {
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var descriptorString = "$:/config/" + platformDescriptor + "/";
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Object.keys(changedTiddlers).forEach(function(configTiddler) {
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var configString = configTiddler.substr(0, configTiddler.lastIndexOf("/") + 1);
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if(configString === descriptorString) {
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shortcutConfigTiddlers.push(configTiddler);
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handled = true;
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}
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});
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});
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if(handled) {
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return $tw.utils.hopArray(changedTiddlers,shortcutConfigTiddlers);
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} else {
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return false;
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}
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};
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KeyboardManager.prototype.handleShortcutChanges = function(changedTiddlers) {
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var newList = this.getShortcutTiddlerList();
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var hasChanged = $tw.utils.hopArray(changedTiddlers,this.shortcutTiddlers) ? true :
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($tw.utils.hopArray(changedTiddlers,newList) ? true :
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(this.detectNewShortcuts(changedTiddlers))
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);
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// Re-cache shortcuts if something changed
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if(hasChanged) {
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this.updateShortcutLists(newList);
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}
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};
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exports.KeyboardManager = KeyboardManager;
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})();
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