// +----------------------------------------------------------------+

// | SimpleTextEditor 1.0                                           |

// | Author: Cezary Tomczak [www.gosu.pl]                           |

// | Free for any use as long as all copyright messages are intact. |

// +----------------------------------------------------------------+



function SimpleTextEditor(id, objectId) {

    if (!id || !objectId) { alert("SimpleTextEditor.constructor(id, objectId) failed, two arguments are required"); }

    var self = this;

    this.id = id;

    this.objectId = objectId;

    this.frame;

    this.viewSource = false;

    

    this.path = ""; // with slash at the end

    this.cssFile = "";

    this.charset = "iso-8859-1";



    this.editorHtml = "";

    this.frameHtml = "";



    this.textareaValue = "";



    this.browser = {

        "ie": Boolean(document.body.currentStyle),

        "gecko" : (navigator.userAgent.toLowerCase().indexOf("gecko") != -1)

    };



    this.init = function() {

        if (document.getElementById && document.createElement && document.designMode && (this.browser.ie || this.browser.gecko)) {

            // EDITOR

            if (!document.getElementById(this.id)) { alert("SimpleTextEditor "+this.objectId+".init() failed, element '"+this.id+"' does not exist"); return; }

            this.textareaValue = document.getElementById(this.id).value;

            var ste = document.createElement("div");

            document.getElementById(this.id).parentNode.replaceChild(ste, document.getElementById(this.id));

            ste.id = this.id+"-ste";

            ste.innerHTML = this.editorHtml ? this.editorHtml : this.getEditorHtml();

            // BUTTONS

            var buttons = ste.getElementsByTagName("td");

            for (var i = 0; i < buttons.length; ++i) {

                if (buttons[i].className == "button") {

                    buttons[i].id = this.id+'-button-'+i;

                    buttons[i].onmouseover = function() { this.className = "button-hover"; }

                    buttons[i].onmouseout = function() { this.className = this.className.replace(/button-hover(\s)?/, "button"); }

                    buttons[i].onclick = function(id) { return function() { this.className = "button-hover button-click"; setTimeout(function(){ document.getElementById(id).className = document.getElementById(id).className.replace(/(\s)?button-click/, ""); }, 100); } }(buttons[i].id);

                }

            }

            // FRAME

            if (this.browser.ie) {

                this.frame = frames[this.id+"-frame"];

            } else if (this.browser.gecko) {

                this.frame = document.getElementById(this.id+"-frame").contentWindow;

            }

            this.frame.document.designMode = "on";

            this.frame.document.open();

            this.frame.document.write(this.frameHtml ? this.frameHtml : this.getFrameHtml());

            this.frame.document.close();

            insertHtmlFromTextarea();

        }

    };



    function lockUrls(s) {

        if (self.browser.gecko) { return s; }

        return s.replace(/href=["']([^"']*)["']/g, 'href="simpletexteditor://simpletexteditor/$1"');

    }



    function unlockUrls(s) {

        if (self.browser.gecko) { return s; }

        return s.replace(/href=["']simpletexteditor:\/\/simpletexteditor\/([^"']*)["']/g, 'href="$1"');

    }



    function insertHtmlFromTextarea() {

        try { self.frame.document.body.innerHTML = lockUrls(self.textareaValue); } catch (e) { setTimeout(insertHtmlFromTextarea, 10); }

    }



    this.getEditorHtml = function() {

        var html = "";

        html += '<input type="hidden" id="'+this.id+'" name="'+this.id+'" value="">';

        html += '<table class="ste" cellspacing="0" cellpadding="0">';

        html += '<tr><td class="bar"><table id="'+this.id+'-buttons" cellspacing="0" cellpadding="0"><tr>';

        html += '<td><select onchange="'+this.objectId+'.execCommand(\'formatblock\', this.value);this.selectedIndex=0;"><option value=""></option><option value="<h1>">Heading 1</option><option value="<h2>">Heading 2</option><option value="<h3>">Heading 3</option><option value="<p>">Paragraph</option><option value="<pre>">Preformatted</option></select></td>';

        html += '<td><div class="separator"></div></td>';

        html += '<td class="button"><img src="/images/steditor/bold.gif" width="20" height="20" alt="Bold" title="Bold" onclick="'+this.objectId+'.execCommand(\'bold\')"></td>';

        html += '<td class="button"><img src="/images/steditor/italic.gif" width="20" height="20" alt="Italic" title="Italic" onclick="'+this.objectId+'.execCommand(\'italic\')"></td>';

        html += '<td class="button"><img src="/images/steditor/underline.gif" width="20" height="20" alt="Underline" title="Underline" onclick="'+this.objectId+'.execCommand(\'underline\')"></td>';

        html += '<td><div class="separator"></div></td>';

        html += '<td class="button"><img src="/images/steditor/left.gif" width="20" height="20" alt="Align Left" title="Align Left" onclick="'+this.objectId+'.execCommand(\'justifyleft\')"></td>';

        html += '<td class="button"><img src="/images/steditor/center.gif" width="20" height="20" alt="Center" title="Center" onclick="'+this.objectId+'.execCommand(\'justifycenter\')"></td>';

        html += '<td class="button"><img src="/images/steditor/right.gif" width="20" height="20" alt="Align Right" title="Align Right" onclick="'+this.objectId+'.execCommand(\'justifyright\')"></td>';

        html += '<td><div class="separator"></div></td>';

        html += '<td class="button"><img src="/images/steditor/ol.gif" width="20" height="20" alt="Ordered List" title="Ordered List" onclick="'+this.objectId+'.execCommand(\'insertorderedlist\')"></td>';

        html += '<td class="button"><img src="/images/steditor/ul.gif" width="20" height="20" alt="Unordered List" title="Unordered List" onclick="'+this.objectId+'.execCommand(\'insertunorderedlist\')"></td>';

        html += '<td><div class="separator"></div></td>';

        html += '<td class="button"><img src="/images/steditor/outdent.gif" width="20" height="20" alt="Outdent" title="Outdent" onclick="'+this.objectId+'.execCommand(\'outdent\')"></td>';

        html += '<td class="button"><img src="/images/steditor/indent.gif" width="20" height="20" alt="Indent" title="Indent" onclick="'+this.objectId+'.execCommand(\'indent\')"></td>';

        html += '<td><div class="separator"></div></td>';

        html += '<td class="button"><img src="/images/steditor/link.gif" width="20" height="20" alt="Insert Link" title="Insert Link" onclick="'+this.objectId+'.execCommand(\'createlink\')"></td>';

        html += '<td class="button"><img src="/images/steditor/image.gif" width="20" height="20" alt="Insert Image" title="Insert Image" onclick="'+this.objectId+'.execCommand(\'insertimage\')"></td>';

//        html += '<td><div class="separator"></div></td>';

//        html += '<td class="button"><img src="/images/steditor/help.gif" width="20" height="20" alt="Help" title="Help" onclick="'+this.objectId+'.openWindow(\''+this.path+'help.html\', \'300\', \'300\')"></td>';

        html += '</tr></table></td></tr>';

        html += '<tr><td class="frame"><iframe id="'+this.id+'-frame" frameborder="0"></iframe></td></tr>';

        html += '<tr><td class="source"><input id="'+this.id+'-viewSource" type="checkbox" onclick="'+this.objectId+'.toggleSource()"> View Source</td></tr>';

        html += '</table>';

        return html;

    };



    this.getFrameHtml = function() {

        var html = "";

        html += '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">';

        html += '<html><head>';

        html += '<meta http-equiv="Content-Type" content="text/html; charset='+this.charset+'">';

        html += '<title>SimpleTextEditor frame</title>';

        html += '<style type="text/css">pre { background-color: #eeeeee; padding: 0.75em 1.5em; border: 1px solid #dddddd; }</style>';

        if (this.cssFile) { html += '<link rel="stylesheet" type="text/css" href="'+this.cssFile+'">'; }

        html += '<style type="text/css">html,body { cursor: text; } body { margin: 0.5em; padding: 0; }</style>';

        html += '</head><body></body></html>';

        return html;

    };



    this.openWindow = function(url, width, height) {

        var x = (screen.width/2-width/2);

        var y = (screen.height/2-height/2);

        window.open(url, "", "scrollbars=yes,width="+width+",height="+height+",screenX="+(x)+",screenY="+y+",left="+x+",top="+y);

    };



    this.toggleSource = function() {

        var html, text;

        if (this.browser.ie) {

            if (!this.viewSource) {

                html = this.frame.document.body.innerHTML;

                this.frame.document.body.innerText = unlockUrls(html);

                document.getElementById(this.id+"-buttons").style.visibility = "hidden";

                this.viewSource = true;

            } else {

                text = this.frame.document.body.innerText;

                this.frame.document.body.innerHTML = lockUrls(text);

                document.getElementById(this.id+"-buttons").style.visibility = "visible";

                this.viewSource = false;

            }

        } else if (this.browser.gecko) {

            if (!this.viewSource) {

                html = document.createTextNode(this.frame.document.body.innerHTML);

                this.frame.document.body.innerHTML = "";

                this.frame.document.body.appendChild(html);

                document.getElementById(this.id+"-buttons").style.visibility = "hidden";

                this.viewSource = true;

            } else {

                html = this.frame.document.body.ownerDocument.createRange();

                html.selectNodeContents(this.frame.document.body);

                this.frame.document.body.innerHTML = html.toString();

                document.getElementById(this.id+"-buttons").style.visibility = "visible";

                this.viewSource = false;

            }

        }

        document.getElementById(this.id+"-viewSource").checked = this.viewSource ? "checked" : "";

        document.getElementById(this.id+"-viewSource").blur();

    };



    this.execCommand = function(cmd, value) {

        if (cmd == "createlink" && !value) {

            var url = prompt("Enter URL:", "");

            if (url) {

                this.frame.focus();

                this.frame.document.execCommand("unlink", false, null);

                if (this.browser.ie) this.frame.document.execCommand(cmd, false, "simpletexteditor://simpletexteditor/"+url);

                else if (this.browser.gecko) this.frame.document.execCommand(cmd, false, url);

                this.frame.focus();

            }

        } else if (cmd == "insertimage" && !value) {

            var imageUrl = prompt("Enter Image URL:", "");

            if (imageUrl) {

                this.frame.focus();

                this.frame.document.execCommand(cmd, false, imageUrl);

                this.frame.focus();

            }

        } else {

            this.frame.focus();

            this.frame.document.execCommand(cmd, false, value);

            this.frame.focus();

        }

    };



    this.isOn = function() {

        return Boolean(this.frame);

    };



    this.getContent = function() {

        try { return unlockUrls(this.frame.document.body.innerHTML); } catch(e) { alert("SimpleTextEditor "+this.objectId+".getContent() failed"); }

    };

    this.setContent = function(content) {
        var toggled = false; 

        if (this.viewSource) {
		this.toggleSource();
		toggled = true;
	 }

        this.frame.document.body.innerHTML = content;

	 if (toggled)
		this.toggleSource();
    }

 

    this.submit = function() {

        if (this.isOn()) {

            if (this.viewSource) { this.toggleSource(); }

            document.getElementById(this.id).value = this.getContent();

        }

    };

}