overleaf/services/web/public/js/ace/keyboard/keybinding.js
2014-02-12 10:23:40 +00:00

136 lines
4.7 KiB
JavaScript
Executable file

/* ***** BEGIN LICENSE BLOCK *****
* Distributed under the BSD license:
*
* Copyright (c) 2010, Ajax.org B.V.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Ajax.org B.V. nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ***** END LICENSE BLOCK ***** */
define(function(require, exports, module) {
"use strict";
var keyUtil = require("../lib/keys");
var event = require("../lib/event");
var KeyBinding = function(editor) {
this.$editor = editor;
this.$data = { };
this.$handlers = [];
this.setDefaultHandler(editor.commands);
};
(function() {
this.setDefaultHandler = function(kb) {
this.removeKeyboardHandler(this.$defaultHandler);
this.$defaultHandler = kb;
this.addKeyboardHandler(kb, 0);
this.$data = {editor: this.$editor};
};
this.setKeyboardHandler = function(kb) {
var h = this.$handlers;
if (h[h.length - 1] == kb)
return;
while (h[h.length - 1] && h[h.length - 1] != this.$defaultHandler)
this.removeKeyboardHandler(h[h.length - 1]);
this.addKeyboardHandler(kb, 1);
};
this.addKeyboardHandler = function(kb, pos) {
if (!kb)
return;
var i = this.$handlers.indexOf(kb);
if (i != -1)
this.$handlers.splice(i, 1);
if (pos == undefined)
this.$handlers.push(kb);
else
this.$handlers.splice(pos, 0, kb);
if (i == -1 && kb.attach)
kb.attach(this.$editor);
};
this.removeKeyboardHandler = function(kb) {
var i = this.$handlers.indexOf(kb);
if (i == -1)
return false;
this.$handlers.splice(i, 1);
kb.detach && kb.detach(this.$editor);
return true;
};
this.getKeyboardHandler = function() {
return this.$handlers[this.$handlers.length - 1];
};
this.$callKeyboardHandlers = function (hashId, keyString, keyCode, e) {
var toExecute;
var success = false;
var commands = this.$editor.commands;
for (var i = this.$handlers.length; i--;) {
toExecute = this.$handlers[i].handleKeyboard(
this.$data, hashId, keyString, keyCode, e
);
if (!toExecute || !toExecute.command)
continue;
// allow keyboardHandler to consume keys
if (toExecute.command == "null") {
success = true;
} else {
success = commands.exec(toExecute.command, this.$editor, toExecute.args, e);
}
// do not stop input events to not break repeating
if (success && e && hashId != -1 &&
toExecute.passEvent != true && toExecute.command.passEvent != true
) {
event.stopEvent(e);
}
if (success)
break;
}
return success;
};
this.onCommandKey = function(e, hashId, keyCode) {
var keyString = keyUtil.keyCodeToString(keyCode);
this.$callKeyboardHandlers(hashId, keyString, keyCode, e);
};
this.onTextInput = function(text) {
var success = this.$callKeyboardHandlers(-1, text);
if (!success)
this.$editor.commands.exec("insertstring", this.$editor, text);
};
}).call(KeyBinding.prototype);
exports.KeyBinding = KeyBinding;
});