257 lines
9.0 KiB
JavaScript
257 lines
9.0 KiB
JavaScript
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/* ***** BEGIN LICENSE BLOCK *****
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* Distributed under the BSD license:
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*
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* Copyright (c) 2010, Ajax.org B.V.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Ajax.org B.V. nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ***** END LICENSE BLOCK ***** */
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define(function(require, exports, module) {
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"use strict";
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var keyUtil = require("../lib/keys");
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var useragent = require("../lib/useragent");
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var KEY_MODS = keyUtil.KEY_MODS;
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function HashHandler(config, platform) {
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this.platform = platform || (useragent.isMac ? "mac" : "win");
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this.commands = {};
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this.commandKeyBinding = {};
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this.addCommands(config);
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this.$singleCommand = true;
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}
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function MultiHashHandler(config, platform) {
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HashHandler.call(this, config, platform);
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this.$singleCommand = false;
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}
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MultiHashHandler.prototype = HashHandler.prototype;
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(function() {
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this.addCommand = function(command) {
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if (this.commands[command.name])
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this.removeCommand(command);
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this.commands[command.name] = command;
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if (command.bindKey)
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this._buildKeyHash(command);
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};
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this.removeCommand = function(command, keepCommand) {
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var name = command && (typeof command === 'string' ? command : command.name);
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command = this.commands[name];
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if (!keepCommand)
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delete this.commands[name];
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// exhaustive search is brute force but since removeCommand is
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// not a performance critical operation this should be OK
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var ckb = this.commandKeyBinding;
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for (var keyId in ckb) {
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var cmdGroup = ckb[keyId];
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if (cmdGroup == command) {
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delete ckb[keyId];
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} else if (Array.isArray(cmdGroup)) {
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var i = cmdGroup.indexOf(command);
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if (i != -1) {
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cmdGroup.splice(i, 1);
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if (cmdGroup.length == 1)
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ckb[keyId] = cmdGroup[0];
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}
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}
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}
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};
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this.bindKey = function(key, command, position) {
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if (typeof key == "object" && key) {
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if (position == undefined)
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position = key.position;
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key = key[this.platform];
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}
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if (!key)
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return;
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if (typeof command == "function")
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return this.addCommand({exec: command, bindKey: key, name: command.name || key});
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key.split("|").forEach(function(keyPart) {
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var chain = "";
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if (keyPart.indexOf(" ") != -1) {
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var parts = keyPart.split(/\s+/);
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keyPart = parts.pop();
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parts.forEach(function(keyPart) {
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var binding = this.parseKeys(keyPart);
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var id = KEY_MODS[binding.hashId] + binding.key;
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chain += (chain ? " " : "") + id;
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this._addCommandToBinding(chain, "chainKeys");
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}, this);
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chain += " ";
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}
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var binding = this.parseKeys(keyPart);
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var id = KEY_MODS[binding.hashId] + binding.key;
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this._addCommandToBinding(chain + id, command, position);
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}, this);
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};
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function getPosition(command) {
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return typeof command == "object" && command.bindKey
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&& command.bindKey.position
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}
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this._addCommandToBinding = function(keyId, command, position) {
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var ckb = this.commandKeyBinding, i;
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if (!command) {
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delete ckb[keyId];
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} else if (!ckb[keyId] || this.$singleCommand) {
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ckb[keyId] = command;
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} else {
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if (!Array.isArray(ckb[keyId])) {
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ckb[keyId] = [ckb[keyId]];
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} else if ((i = ckb[keyId].indexOf(command)) != -1) {
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ckb[keyId].splice(i, 1);
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}
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if (typeof position != "number") {
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position = getPosition(command);
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}
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var commands = ckb[keyId];
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for (i = 0; i < commands.length; i++) {
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var other = commands[i];
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var otherPos = getPosition(other);
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if (otherPos > position)
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break;
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}
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commands.splice(i, 0, command);
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}
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};
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this.addCommands = function(commands) {
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commands && Object.keys(commands).forEach(function(name) {
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var command = commands[name];
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if (!command)
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return;
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if (typeof command === "string")
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return this.bindKey(command, name);
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if (typeof command === "function")
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command = { exec: command };
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if (typeof command !== "object")
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return;
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if (!command.name)
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command.name = name;
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this.addCommand(command);
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}, this);
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};
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this.removeCommands = function(commands) {
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Object.keys(commands).forEach(function(name) {
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this.removeCommand(commands[name]);
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}, this);
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};
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this.bindKeys = function(keyList) {
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Object.keys(keyList).forEach(function(key) {
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this.bindKey(key, keyList[key]);
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}, this);
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};
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this._buildKeyHash = function(command) {
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this.bindKey(command.bindKey, command);
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};
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// accepts keys in the form ctrl+Enter or ctrl-Enter
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// keys without modifiers or shift only
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this.parseKeys = function(keys) {
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var parts = keys.toLowerCase().split(/[\-\+]([\-\+])?/).filter(function(x){return x;});
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var key = parts.pop();
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var keyCode = keyUtil[key];
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if (keyUtil.FUNCTION_KEYS[keyCode])
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key = keyUtil.FUNCTION_KEYS[keyCode].toLowerCase();
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else if (!parts.length)
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return {key: key, hashId: -1};
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else if (parts.length == 1 && parts[0] == "shift")
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return {key: key.toUpperCase(), hashId: -1};
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var hashId = 0;
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for (var i = parts.length; i--;) {
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var modifier = keyUtil.KEY_MODS[parts[i]];
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if (modifier == null) {
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if (typeof console != "undefined")
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console.error("invalid modifier " + parts[i] + " in " + keys);
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return false;
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}
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hashId |= modifier;
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}
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return {key: key, hashId: hashId};
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};
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this.findKeyCommand = function findKeyCommand(hashId, keyString) {
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var key = KEY_MODS[hashId] + keyString;
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return this.commandKeyBinding[key];
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};
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this.handleKeyboard = function(data, hashId, keyString, keyCode) {
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if (keyCode < 0) return;
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var key = KEY_MODS[hashId] + keyString;
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var command = this.commandKeyBinding[key];
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if (data.$keyChain) {
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data.$keyChain += " " + key;
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command = this.commandKeyBinding[data.$keyChain] || command;
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}
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if (command) {
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if (command == "chainKeys" || command[command.length - 1] == "chainKeys") {
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data.$keyChain = data.$keyChain || key;
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return {command: "null"};
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}
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}
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if (data.$keyChain) {
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if ((!hashId || hashId == 4) && keyString.length == 1)
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data.$keyChain = data.$keyChain.slice(0, -key.length - 1); // wait for input
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else if (hashId == -1 || keyCode > 0)
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data.$keyChain = ""; // reset keyChain
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}
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return {command: command};
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};
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this.getStatusText = function(editor, data) {
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return data.$keyChain || "";
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};
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}).call(HashHandler.prototype);
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exports.HashHandler = HashHandler;
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exports.MultiHashHandler = MultiHashHandler;
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});
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