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/**
* Shortcuts.js
*
* Released under LGPL License.
* Copyright (c) 1999-2015 Ephox Corp. All rights reserved
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/**
* Contains all logic for handling of keyboard shortcuts.
*
* @class tinymce.Shortcuts
* @example
* editor.shortcuts.add('ctrl+a', function() {});
* editor.shortcuts.add('meta+a', function() {}); // "meta" maps to Command on Mac and Ctrl on PC
* editor.shortcuts.add('ctrl+alt+a', function() {});
* editor.shortcuts.add('access+a', function() {}); // "access" maps to ctrl+alt on Mac and shift+alt on PC
*/
define("tinymce/Shortcuts", [
"tinymce/util/Tools",
"tinymce/Env"
], function(Tools, Env) {
var each = Tools.each, explode = Tools.explode;
var keyCodeLookup = {
"f9": 120,
"f10": 121,
"f11": 122
};
var modifierNames = Tools.makeMap('alt,ctrl,shift,meta,access');
return function(editor) {
var self = this, shortcuts = {}, pendingPatterns = [];
function parseShortcut(pattern) {
var id, key, shortcut = {};
// Parse modifiers and keys ctrl+alt+b for example
each(explode(pattern, '+'), function(value) {
if (value in modifierNames) {
shortcut[value] = true;
} else {
// Allow numeric keycodes like ctrl+219 for ctrl+[
if (/^[0-9]{2,}$/.test(value)) {
shortcut.keyCode = parseInt(value, 10);
} else {
shortcut.charCode = value.charCodeAt(0);
shortcut.keyCode = keyCodeLookup[value] || value.toUpperCase().charCodeAt(0);
}
}
});
// Generate unique id for modifier combination and set default state for unused modifiers
id = [shortcut.keyCode];
for (key in modifierNames) {
if (shortcut[key]) {
id.push(key);
} else {
shortcut[key] = false;
}
}
shortcut.id = id.join(',');
// Handle special access modifier differently depending on Mac/Win
if (shortcut.access) {
shortcut.alt = true;
if (Env.mac) {
shortcut.ctrl = true;
} else {
shortcut.shift = true;
}
}
// Handle special meta modifier differently depending on Mac/Win
if (shortcut.meta) {
if (Env.mac) {
shortcut.meta = true;
} else {
shortcut.ctrl = true;
shortcut.meta = false;
}
}
return shortcut;
}
function createShortcut(pattern, desc, cmdFunc, scope) {
var shortcuts;
shortcuts = Tools.map(explode(pattern, '>'), parseShortcut);
shortcuts[shortcuts.length - 1] = Tools.extend(shortcuts[shortcuts.length - 1], {
func: cmdFunc,
scope: scope || editor
});
return Tools.extend(shortcuts[0], {
desc: editor.translate(desc),
subpatterns: shortcuts.slice(1)
});
}
function hasModifier(e) {
return e.altKey || e.ctrlKey || e.metaKey;
}
function isFunctionKey(e) {
return e.keyCode >= 112 && e.keyCode <= 123;
}
function matchShortcut(e, shortcut) {
if (!shortcut) {
return false;
}
if (shortcut.ctrl != e.ctrlKey || shortcut.meta != e.metaKey) {
return false;
}
if (shortcut.alt != e.altKey || shortcut.shift != e.shiftKey) {
return false;
}
if (e.keyCode == shortcut.keyCode || (e.charCode && e.charCode == shortcut.charCode)) {
e.preventDefault();
return true;
}
return false;
}
function executeShortcutAction(shortcut) {
return shortcut.func ? shortcut.func.call(shortcut.scope) : null;
}
editor.on('keyup keypress keydown', function(e) {
if ((hasModifier(e) || isFunctionKey(e)) && !e.isDefaultPrevented()) {
each(shortcuts, function(shortcut) {
if (matchShortcut(e, shortcut)) {
pendingPatterns = shortcut.subpatterns.slice(0);
if (e.type == "keydown") {
executeShortcutAction(shortcut);
}
return true;
}
});
if (matchShortcut(e, pendingPatterns[0])) {
if (pendingPatterns.length === 1) {
if (e.type == "keydown") {
executeShortcutAction(pendingPatterns[0]);
}
}
pendingPatterns.shift();
}
}
});
/**
* Adds a keyboard shortcut for some command or function.
*
* @method addShortcut
* @param {String} pattern Shortcut pattern. Like for example: ctrl+alt+o.
* @param {String} desc Text description for the command.
* @param {String/Function} cmdFunc Command name string or function to execute when the key is pressed.
* @param {Object} scope Optional scope to execute the function in.
* @return {Boolean} true/false state if the shortcut was added or not.
*/
self.add = function(pattern, desc, cmdFunc, scope) {
var cmd;
cmd = cmdFunc;
if (typeof cmdFunc === 'string') {
cmdFunc = function() {
editor.execCommand(cmd, false, null);
};
} else if (Tools.isArray(cmd)) {
cmdFunc = function() {
editor.execCommand(cmd[0], cmd[1], cmd[2]);
};
}
each(explode(Tools.trim(pattern.toLowerCase())), function(pattern) {
var shortcut = createShortcut(pattern, desc, cmdFunc, scope);
shortcuts[shortcut.id] = shortcut;
});
return true;
};
/**
* Remove a keyboard shortcut by pattern.
*
* @method remove
* @param {String} pattern Shortcut pattern. Like for example: ctrl+alt+o.
* @return {Boolean} true/false state if the shortcut was removed or not.
*/
self.remove = function(pattern) {
var shortcut = createShortcut(pattern);
if (shortcuts[shortcut.id]) {
delete shortcuts[shortcut.id];
return true;
}
return false;
};
};
});