/**
* Base class for Editor. Handles the business logic of Editor, no GUI involved only utility methods and events.
* @module editor
* @submodule editor-base
*/
/**
* Base class for Editor. Handles the business logic of Editor, no GUI involved only utility methods and events.
* @class EditorBase
* @for EditorBase
* @extends Base
* @constructor
*/
var EditorBase = function() {
EditorBase.superclass.constructor.apply(this, arguments);
};
Y.extend(EditorBase, Y.Base, {
/**
* Internal reference to the Y.Frame instance
* @property frame
*/
frame: null,
initializer: function() {
var frame = new Y.Frame({
designMode: true,
title: EditorBase.STRINGS.title,
use: EditorBase.USE,
dir: this.get('dir'),
extracss: this.get('extracss'),
host: this
}).plug(Y.Plugin.ExecCommand);
frame.after('ready', Y.bind(this._afterFrameReady, this));
frame.addTarget(this);
this.frame = frame;
this.publish('nodeChange', {
emitFacade: true,
bubbles: true,
defaultFn: this._defNodeChangeFn
});
},
destructor: function() {
this.frame.destroy();
this.detachAll();
},
/**
* Copy certain styles from one node instance to another (used for new paragraph creation mainly)
* @method copyStyles
* @param {Node} from The Node instance to copy the styles from
* @param {Node} to The Node instance to copy the styles to
*/
copyStyles: function(from, to) {
var styles = ['color', 'fontSize', 'fontFamily', 'backgroundColor', 'fontStyle' ],
newStyles = {};
Y.each(styles, function(v) {
newStyles[v] = from.getStyle(v);
});
if (from.ancestor('b,strong')) {
newStyles.fontWeight = 'bold';
}
to.setStyles(newStyles);
},
/**
* Utility method to create an empty paragraph when the document is empty.
* @private
* @method _fixFirstPara
*/
_fixFirstPara: function() {
var inst = this.getInstance(), sel;
inst.one('body').setContent('<p> </p>');
sel = new inst.Selection();
try {
sel.selectNode(inst.one('body > p').get('firstChild'));
} catch (er) {}
},
/**
* The default handler for the nodeChange event.
* @method _defNodeChangeFn
* @param {Event} e The event
* @private
*/
_defNodeChangeFn: function(e) {
Y.log('Default nodeChange function: ' + e.changedType, 'info', 'editor');
var inst = this.getInstance();
/*
* @TODO
* This whole method needs to be fixed and made more dynamic.
* Maybe static functions for the e.changeType and an object bag
* to walk through and filter to pass off the event to before firing..
*/
switch (e.changedType) {
case 'keydown':
var cont = inst.config.doc.body.innerHTML;
if (cont && cont.toLowerCase() == '<br>') {
this._fixFirstPara();
}
break;
case 'backspace-up':
case 'delete-up':
var ps = inst.all('body > p'), br, p, sel, item;
if (ps.size() < 2) {
item = inst.one('body');
if (ps.item(0)) {
item = ps.item(0);
}
if (inst.Selection.getText(item) === '' && !item.test('p')) {
this._fixFirstPara();
} else if (item.test('p') && item.get('innerHTML').length === 0) {
e.changedEvent.halt();
}
}
break;
case 'enter-up':
if (e.changedNode.test('p')) {
var prev = e.changedNode.previous(), lc, lc2, found = false;
if (prev) {
lc = prev.one(':last-child');
while (!found) {
if (lc) {
lc2 = lc.one(':last-child');
if (lc2) {
lc = lc2;
} else {
found = true;
}
} else {
found = true;
}
}
if (lc) {
this.copyStyles(lc, e.changedNode);
}
}
}
//TODO
//inst.Selection.filterBlocks();
break;
case 'tab':
if (!e.changedNode.test('li, li *') && !e.changedEvent.shiftKey) {
Y.log('Overriding TAB key to insert HTML', 'info', 'editor');
this.execCommand('inserthtml', EditorBase.TABKEY + inst.Selection.CURSOR);
var sel = new inst.Selection().focusCursor();
e.changedEvent.halt();
}
break;
}
var changed = this.getDomPath(e.changedNode),
cmds = {}, family, fsize, classes = [],
fColor = '', bColor = '';
if (e.commands) {
cmds = e.commands;
}
changed.each(function(n) {
var tag = n.get('tagName').toLowerCase(),
cmd = EditorBase.TAG2CMD[tag],
el = Y.Node.getDOMNode(n);
if (cmd) {
cmds[cmd] = 1;
}
//Bold and Italic styles
var s = el.style;
if (s.fontWeight.toLowerCase() == 'bold') {
cmds.bold = 1;
}
if (s.fontStyle.toLowerCase() == 'italic') {
cmds.italic = 1;
}
if (s.textDecoration.toLowerCase() == 'underline') {
cmds.underline = 1;
}
if (s.textDecoration.toLowerCase() == 'line-through') {
cmds.strikethrough = 1;
}
var family2 = n.getStyle('fontFamily').split(',')[0].toLowerCase();
if (family2) {
family = family2;
}
fsize = n.getStyle('fontSize');
var cls = n.get('className').split(' ');
Y.each(cls, function(v) {
if (v !== '' && (v.substr(0, 4) !== 'yui_')) {
classes.push(v);
}
});
fColor = EditorBase.FILTER_RGB(n.getStyle('color'));
var bColor2 = EditorBase.FILTER_RGB(n.getStyle('backgroundColor'));
if (bColor2 !== 'transparent') {
bColor = bColor2;
}
});
e.dompath = changed;
e.classNames = classes;
e.commands = cmds;
//TODO Dont' like this, not dynamic enough..
if (!e.fontFamily) {
e.fontFamily = family;
}
if (!e.fontSize) {
e.fontSize = fsize;
}
if (!e.fontColor) {
e.fontColor = fColor;
}
if (!e.backgroundColor) {
e.backgroundColor = bColor;
}
},
/**
* Walk the dom tree from this node up to body, returning a reversed array of parents.
* @method getDomPath
* @param {Node} node The Node to start from
*/
getDomPath: function(node) {
var domPath = [],
inst = this.frame.getInstance();
while (node !== null) {
if (node.test('html') || node.test('doc') || !node.get('tagName')) {
node = null;
break;
}
if (!node.inDoc()) {
node = null;
break;
}
//Check to see if we get el.nodeName and nodeType
if (node.get('nodeName') && node.get('nodeType') && (node.get('nodeType') == 1)) {
domPath.push(inst.Node.getDOMNode(node));
}
if (node.test('body')) {
node = null;
break;
}
node = node.get('parentNode');
}
if (domPath.length === 0) {
domPath[0] = inst.config.doc.body;
}
return inst.all(domPath.reverse());
},
/**
* After frame ready, bind mousedown & keyup listeners
* @method _afterFrameReady
* @private
*/
_afterFrameReady: function() {
var inst = this.frame.getInstance();
this.frame.on('mousedown', Y.bind(this._onFrameMouseDown, this));
this.frame.on('keyup', Y.bind(this._onFrameKeyUp, this));
this.frame.on('keydown', Y.bind(this._onFrameKeyDown, this));
this.frame.on('keypress', Y.bind(this._onFrameKeyPress, this));
inst.Selection.filter();
},
/**
* Fires nodeChange event
* @method _onFrameMouseDown
* @private
*/
_onFrameMouseDown: function(e) {
this.fire('nodeChange', { changedNode: e.frameTarget, changedType: 'mousedown', changedEvent: e });
},
/**
* Fires nodeChange event for keyup on specific keys
* @method _onFrameKeyUp
* @private
*/
_onFrameKeyUp: function(e) {
var inst = this.frame.getInstance(),
sel = new inst.Selection();
if (sel.anchorNode) {
this.fire('nodeChange', { changedNode: sel.anchorNode, changedType: 'keyup', selection: sel, changedEvent: e });
if (EditorBase.NC_KEYS[e.keyCode]) {
this.fire('nodeChange', { changedNode: sel.anchorNode, changedType: EditorBase.NC_KEYS[e.keyCode] + '-up', selection: sel, changedEvent: e });
}
}
},
/**
* Fires nodeChange event
* @method _onFrameKeyDown
* @private
*/
_onFrameKeyDown: function(e) {
var inst = this.frame.getInstance(),
sel = new inst.Selection();
if (sel.anchorNode) {
this.fire('nodeChange', { changedNode: sel.anchorNode, changedType: 'keydown', changedEvent: e });
if (EditorBase.NC_KEYS[e.keyCode]) {
this.fire('nodeChange', { changedNode: sel.anchorNode, changedType: EditorBase.NC_KEYS[e.keyCode], changedEvent: e });
this.fire('nodeChange', { changedNode: sel.anchorNode, changedType: EditorBase.NC_KEYS[e.keyCode] + '-down', changedEvent: e });
}
}
},
/**
* Fires nodeChange event
* @method _onFrameKeyPress
* @private
*/
_onFrameKeyPress: function(e) {
var inst = this.frame.getInstance(),
sel = new inst.Selection();
if (sel.anchorNode) {
this.fire('nodeChange', { changedNode: sel.anchorNode, changedType: 'keypress', changedEvent: e });
if (EditorBase.NC_KEYS[e.keyCode]) {
this.fire('nodeChange', { changedNode: sel.anchorNode, changedType: EditorBase.NC_KEYS[e.keyCode] + '-press', changedEvent: e });
}
}
},
/**
* Pass through to the frame.execCommand method
* @method execCommand
* @param {String} cmd The command to pass: inserthtml, insertimage, bold
* @param {String} val The optional value of the command: Helvetica
* @return {Node/NodeList} The Node or Nodelist affected by the command. Only returns on override commands, not browser defined commands.
*/
execCommand: function(cmd, val) {
var ret = this.frame.execCommand(cmd, val),
inst = this.frame.getInstance(),
sel = new inst.Selection(), cmds = {},
e = { changedNode: sel.anchorNode, changedType: 'execcommand', nodes: ret };
switch (cmd) {
case 'forecolor':
e.fontColor = val;
break;
case 'backcolor':
e.backgroundColor = val;
break;
case 'fontsize':
e.fontSize = val;
break;
case 'fontname':
e.fontFamily = val;
break;
}
cmds[cmd] = 1;
e.commands = cmds;
this.fire('nodeChange', e);
return ret;
},
/**
* Get the YUI instance of the frame
* @method getInstance
* @return {YUI} The YUI instance bound to the frame.
*/
getInstance: function() {
return this.frame.getInstance();
},
/**
* Renders the Y.Frame to the passed node.
* @method render
* @param {Selector/HTMLElement/Node} node The node to append the Editor to
* @return {EditorBase}
* @chainable
*/
render: function(node) {
this.frame.set('content', this.get('content'));
this.frame.render(node);
return this;
},
/**
* Focus the contentWindow of the iframe
* @method focus
* @return {EditorBase}
* @chainable
*/
focus: function() {
this.frame.focus();
return this;
},
/**
* Handles the showing of the Editor instance. Currently only handles the iframe
* @method show
* @return {EditorBase}
* @chainable
*/
show: function() {
this.frame.show();
return this;
},
/**
* Handles the hiding of the Editor instance. Currently only handles the iframe
* @method hide
* @return {EditorBase}
* @chainable
*/
hide: function() {
this.frame.hide();
return this;
},
/**
* (Un)Filters the content of the Editor, cleaning YUI related code. //TODO better filtering
* @method getContent
* @return {String} The filtered content of the Editor
*/
getContent: function() {
var html = '', inst = this.getInstance();
if (inst && inst.Selection) {
html = inst.Selection.unfilter();
}
//Removing the _yuid from the objects in IE
html = html.replace(/ _yuid="([^>]*)"/g, '');
return html;
}
}, {
/**
* @static
* @property TABKEY
* @description The HTML markup to use for the tabkey
*/
TABKEY: '<span class="tab"> </span>',
/**
* @static
* @method FILTER_RGB
* @param String css The CSS string containing rgb(#,#,#);
* @description Converts an RGB color string to a hex color, example: rgb(0, 255, 0) converts to #00ff00
* @return String
*/
FILTER_RGB: function(css) {
if (css.toLowerCase().indexOf('rgb') != -1) {
var exp = new RegExp("(.*?)rgb\\s*?\\(\\s*?([0-9]+).*?,\\s*?([0-9]+).*?,\\s*?([0-9]+).*?\\)(.*?)", "gi");
var rgb = css.replace(exp, "$1,$2,$3,$4,$5").split(',');
if (rgb.length == 5) {
var r = parseInt(rgb[1], 10).toString(16);
var g = parseInt(rgb[2], 10).toString(16);
var b = parseInt(rgb[3], 10).toString(16);
r = r.length == 1 ? '0' + r : r;
g = g.length == 1 ? '0' + g : g;
b = b.length == 1 ? '0' + b : b;
css = "#" + r + g + b;
}
}
return css;
},
/**
* @static
* @property TAG2CMD
* @description A hash table of tags to their execcomand's
*/
TAG2CMD: {
'b': 'bold',
'strong': 'bold',
'i': 'italic',
'em': 'italic',
'u': 'underline',
'sup': 'superscript',
'sub': 'subscript',
'img': 'insertimage',
'a' : 'createlink',
'ul' : 'insertunorderedlist',
'ol' : 'insertorderedlist'
},
/**
* Hash table of keys to fire a nodeChange event for.
* @static
* @property NC_KEYS
* @type Object
*/
NC_KEYS: {
8: 'backspace',
9: 'tab',
13: 'enter',
32: 'space',
33: 'pageup',
34: 'pagedown',
35: 'end',
36: 'home',
37: 'left',
38: 'up',
39: 'right',
40: 'down',
46: 'delete'
},
/**
* The default modules to use inside the Frame
* @static
* @property USE
* @type Array
*/
USE: ['substitute', 'node','selector-css3', 'selection', 'stylesheet'],
/**
* The Class Name: editorBase
* @static
* @property NAME
*/
NAME: 'editorBase',
/**
* Editor Strings
* @static
* @property STRINGS
*/
STRINGS: {
/**
* Title of frame document: Rich Text Editor
* @static
* @property STRINGS.title
*/
title: 'Rich Text Editor'
},
ATTRS: {
/**
* The content to load into the Editor Frame
* @attribute content
*/
content: {
value: '<br>',
setter: function(str) {
if (str.substr(0, 1) === "\n") {
Y.log('Stripping first carriage return from content before injecting', 'warn', 'editor');
str = str.substr(1);
}
if (str === '') {
str = '<br>';
}
return this.frame.set('content', str);
},
getter: function() {
return this.frame.get('content');
}
},
/**
* The value of the dir attribute on the HTML element of the frame. Default: ltr
* @attribute dir
*/
dir: {
writeOnce: true,
value: 'ltr'
},
/**
* @attribute extracss
* @description A string of CSS to add to the Head of the Editor
* @type String
*/
extracss: {
value: false,
setter: function(css) {
if (this.frame) {
this.frame.set('extracss', css);
}
return css;
}
}
}
});
Y.EditorBase = EditorBase;
/**
* @event nodeChange
* @description Fired from mouseup & keyup.
* @param {Event.Facade} event An Event Facade object with the following specific properties added:
* <dl>
* <dt>changedEvent</dt><dd>The event that caused the nodeChange</dd>
* <dt>changedNode</dt><dd>The node that was interacted with</dd>
* <dt>changedType</dt><dd>The type of change: mousedown, mouseup, right, left, backspace, tab, enter, etc..</dd>
* <dt>commands</dt><dd>The list of execCommands that belong to this change and the dompath that's associated with the changedNode</dd>
* <dt>classNames</dt><dd>An array of classNames that are applied to the changedNode and all of it's parents</dd>
* <dt>dompath</dt><dd>A sorted array of node instances that make up the DOM path from the changedNode to body.</dd>
* <dt>backgroundColor</dt><dd>The cascaded backgroundColor of the changedNode</dd>
* <dt>fontColor</dt><dd>The cascaded fontColor of the changedNode</dd>
* <dt>fontFamily</dt><dd>The cascaded fontFamily of the changedNode</dd>
* <dt>fontSize</dt><dd>The cascaded fontSize of the changedNode</dd>
* </dl>
* @type {Event.Custom}
*/