/* ***** BEGIN LICENSE BLOCK *****
 * This file is part of DotClear.
 * Copyright (c) 2005 Nicolas Martin & Olivier Meunier and contributors. All
 * rights reserved.
 *
 * DotClear is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * DotClear is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with DotClear; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * ***** END LICENSE BLOCK *****
*/
function addListener(element, name, handler) {
	if (element.addEventListener) {
		element.addEventListener(name,handler,false);
	} else if (element.attachEvent) {
		element.attachEvent('on'+name,handler);
	}
}

function removeListener(element, name, handler) {
	if (element.removeEventListener) {
		element.removeEventListener(name,handler,false);
	} else if (element.detachEvent) {
		element.detachEvent('on'+name,handler);
	}
}

function jsToolBar(textarea) {
	if (!document.createElement) { return; }

	if (!textarea) { return; }

	if ((typeof(document["selection"]) == "undefined")
	&& (typeof(textarea["setSelectionRange"]) == "undefined")) {
		return;
	}

	this.textarea = textarea;

	this.editor = document.createElement('div');
	this.editor.className = 'jstEditor';

	this.textarea.parentNode.insertBefore(this.editor,this.textarea);
	this.editor.appendChild(this.textarea);

	this.toolbar = document.createElement("div");
	this.toolbar.className = 'jstElements';
	this.editor.parentNode.insertBefore(this.toolbar,this.editor);

	this.handle = document.createElement('div');
	this.handle.className = 'jstHandle';
	var dragStart = this.resizeDragStart;
	var This = this;
	addListener(this.handle,'mousedown',function(event) {
		dragStart.call(This,event);
	});
	// fix memory leak in Firefox (bug #241518)
	addListener(window,'unload',function() {
		var del = This.handle.parentNode.removeChild(This.handle);
		delete(This.handle);
	});
	this.editor.parentNode.insertBefore(this.handle,this.editor.nextSibling);

	this.context = null;
	this.toolNodes = {}; // lorsque la toolbar est dessinée , cet objet est garni
					// de raccourcis vers les éléments DOM correspondants aux outils.
}

function jsButton(title, fn, scope, className) {
	this.title = title || null;
	this.fn = fn || function(){};
	this.scope = scope || null;
	this.className = className || null;
}
jsButton.prototype.draw = function() {
	if (!this.scope) return null;

	var button = document.createElement('button');
	button.setAttribute('type','button');
	if (this.className) button.className = this.className;
	button.title = this.title;
	var span = document.createElement('span');
	span.appendChild(document.createTextNode(this.title));
	button.appendChild(span);

	if (this.icon != undefined) {
		button.style.backgroundImage = 'url('+this.icon+')';
	}
	if (typeof(this.fn) == 'function') {
		var This = this;
		button.onclick = function() { try { This.fn.apply(This.scope, arguments) } catch (e) {} return false; };
	}
	return button;
}

function jsSpace(id) {
	this.id = id || null;
	this.width = null;
}
jsSpace.prototype.draw = function() {
	var span = document.createElement('span');
	if (this.id) span.id = this.id;
	span.appendChild(document.createTextNode(String.fromCharCode(160)));
	span.className = 'jstSpacer';
	if (this.width) span.style.marginRight = this.width+'px';

	return span;
}

function jsCombo(title, options, scope, fn, className) {
	this.title = title || null;
	this.options = options || null;
	this.scope = scope || null;
	this.fn = fn || function(){};
	this.className = className || null;
}
jsCombo.prototype.draw = function() {
	if (!this.scope || !this.options) return null;

	var select = document.createElement('select');
	if (this.className) select.className = className;
	select.title = this.title;

	for (var o in this.options) {
		//var opt = this.options[o];
		var option = document.createElement('option');
		option.value = o;
		option.appendChild(document.createTextNode(this.options[o]));
		select.appendChild(option);
	}

	var This = this;
	select.onchange = function() {
		try {
			This.fn.call(This.scope, this.value);
		} catch (e) { alert(e); }

		return false;
	}

	return select;
}


jsToolBar.prototype = {
	base_url: '',
	mode: 'wiki',
	elements: {},

	getMode: function() {
		return this.mode;
	},

	setMode: function(mode) {
		this.mode = mode || 'wiki';
	},

	switchMode: function(mode) {
		mode = mode || 'wiki';
		this.draw(mode);
	},

	button: function(toolName) {
		var tool = this.elements[toolName];
		if (typeof tool.fn[this.mode] != 'function') return null;
		var b = new jsButton(tool.title, tool.fn[this.mode], this, 'jstb_'+toolName);
		if (tool.icon != undefined) b.icon = tool.icon;
		return b;
	},
	space: function(toolName) {
		var tool = new jsSpace(toolName)
		if (this.elements[toolName].width !== undefined)
			tool.width = this.elements[toolName].width;
		return tool;
	},
	combo: function(toolName) {
		var tool = this.elements[toolName];
		var length = tool[this.mode].list.length;

		if (typeof tool[this.mode].fn != 'function' || length == 0) {
			return null;
		} else {
			var options = {};
			for (var i=0; i < length; i++) {
				var opt = tool[this.mode].list[i];
				options[opt] = tool.options[opt];
			}
			return new jsCombo(tool.title, options, this, tool[this.mode].fn);
		}
	},
	draw: function(mode) {
		this.setMode(mode);

		// Empty toolbar
		while (this.toolbar.hasChildNodes()) {
			this.toolbar.removeChild(this.toolbar.firstChild)
		}
		this.toolNodes = {}; // vide les raccourcis DOM/**/

		// Draw toolbar elements
		var b, tool, newTool;

		for (var i in this.elements) {
			b = this.elements[i];

			var disabled =
			b.type == undefined || b.type == ''
			|| (b.disabled != undefined && b.disabled)
			|| (b.context != undefined && b.context != null && b.context != this.context);

			if (!disabled && typeof this[b.type] == 'function') {
				tool = this[b.type](i);
				if (tool) newTool = tool.draw();
				if (newTool) {
					this.toolNodes[i] = newTool; //mémorise l'accès DOM pour usage éventuel ultérieur
					this.toolbar.appendChild(newTool);
				}
			}
		}
	},

	singleTag: function(stag,etag) {
		stag = stag || null;
		etag = etag || stag;

		if (!stag || !etag) { return; }

		this.encloseSelection(stag,etag);
	},

	encloseSelection: function(prefix, suffix, fn) {
		this.textarea.focus();

		prefix = prefix || '';
		suffix = suffix || '';

		var start, end, sel, scrollPos, subst, res;

		if (typeof(document["selection"]) != "undefined") {
			sel = document.selection.createRange().text;
		} else if (typeof(this.textarea["setSelectionRange"]) != "undefined") {
			start = this.textarea.selectionStart;
			end = this.textarea.selectionEnd;
			scrollPos = this.textarea.scrollTop;
			sel = this.textarea.value.substring(start, end);
		}

		if (sel.match(/ $/)) { // exclude ending space char, if any
			sel = sel.substring(0, sel.length - 1);
			suffix = suffix + " ";
		}

		if (typeof(fn) == 'function') {
			res = (sel) ? fn.call(this,sel) : fn('');
		} else {
			res = (sel) ? sel : '';
		}

		subst = prefix + res + suffix;

		if (typeof(document["selection"]) != "undefined") {
			var range = document.selection.createRange().text = subst;
			this.textarea.caretPos -= suffix.length;
		} else if (typeof(this.textarea["setSelectionRange"]) != "undefined") {
			this.textarea.value = this.textarea.value.substring(0, start) + subst +
			this.textarea.value.substring(end);
			if (sel) {
				this.textarea.setSelectionRange(start + subst.length, start + subst.length);
			} else {
				this.textarea.setSelectionRange(start + prefix.length, start + prefix.length);
			}
			this.textarea.scrollTop = scrollPos;
		}
	},

	stripBaseURL: function(url) {
		if (this.base_url != '') {
			var pos = url.indexOf(this.base_url);
			if (pos == 0) {
				url = url.substr(this.base_url.length);
			}
		}

		return url;
	}
};

/** Resizer
-------------------------------------------------------- */
jsToolBar.prototype.resizeSetStartH = function() {
	this.dragStartH = this.textarea.offsetHeight + 0;
};
jsToolBar.prototype.resizeDragStart = function(event) {
	var This = this;
	this.dragStartY = event.clientY;
	this.resizeSetStartH();
	addListener(document,'mousemove', this.dragMoveHdlr=function(event){This.resizeDragMove(event);});
	addListener(document,'mouseup', this.dragStopHdlr=function(event){This.resizeDragStop(event);});
};

jsToolBar.prototype.resizeDragMove = function(event) {
	this.textarea.style.height = (this.dragStartH+event.clientY-this.dragStartY)+'px';
};

jsToolBar.prototype.resizeDragStop = function(event) {
	removeListener(document,'mousemove', this.dragMoveHdlr);
	removeListener(document,'mouseup', this.dragStopHdlr);
};

// Elements definition ------------------------------------

// strong
jsToolBar.prototype.elements.strong = {
	type: 'button',
	title: 'Strong emphasis',
	fn: {
		wiki: function() { this.singleTag('__') }
	}
}

// em
jsToolBar.prototype.elements.em = {
	type: 'button',
	title: 'Emphasis',
	fn: {
		wiki: function() { this.singleTag("''") }
	}
}

// ins
jsToolBar.prototype.elements.ins = {
	type: 'button',
	title: 'Inserted',
	fn: {
		wiki: function() { this.singleTag('++') }
	}
}

// del
jsToolBar.prototype.elements.del = {
	type: 'button',
	title: 'Deleted',
	fn: {
		wiki: function() { this.singleTag('--') }
	}
}

// quote
jsToolBar.prototype.elements.quote = {
	type: 'button',
	title: 'Inline quote',
	fn: {
		wiki: function() { this.singleTag('{{','}}') }
	}
}

// code
jsToolBar.prototype.elements.code = {
	type: 'button',
	title: 'Code',
	fn: {
		wiki: function() { this.singleTag('@@') }
	}
}

// spacer
jsToolBar.prototype.elements.space1 = {type: 'space'}

// br
jsToolBar.prototype.elements.br = {
	type: 'button',
	title: 'Line break',
	fn: {
		wiki: function() { this.encloseSelection("\n",'') }
	}
}

// spacer
jsToolBar.prototype.elements.space2 = {type: 'space'}

// ul
jsToolBar.prototype.elements.ul = {
	type: 'button',
	title: 'Unordered list',
	fn: {
		wiki: function() {
			this.encloseSelection('','',function(str) {
				str = str.replace(/\r/g,'');
				return '* '+str.replace(/\n/g,"\n* ");
			});
		}
	}
}

// ol
jsToolBar.prototype.elements.ol = {
	type: 'button',
	title: 'Ordered list',
	fn: {
		wiki: function() {
			this.encloseSelection('','',function(str) {
				str = str.replace(/\r/g,'');
				return '# '+str.replace(/\n/g,"\n# ");
			});
		}
	}
}

// spacer
jsToolBar.prototype.elements.space3 = {type: 'space'}

// link
jsToolBar.prototype.elements.link = {
	type: 'button',
	title: 'Link',
	fn: {},
	href_prompt: 'Please give page URL:',
	hreflang_prompt: 'Language of this page:',
	default_hreflang: '',
	prompt: function(href,hreflang) {
		href = href || '';
		hreflang = hreflang || this.elements.link.default_hreflang;

		href = window.prompt(this.elements.link.href_prompt,href);
		if (!href) { return false; }

		hreflang = window.prompt(this.elements.link.hreflang_prompt,
		hreflang);

		return { href: this.stripBaseURL(href), hreflang: hreflang };
	}
}

jsToolBar.prototype.elements.link.fn.wiki = function() {
	var link = this.elements.link.prompt.call(this);
	if (link) {
		var stag = '[';
		var etag = '|'+link.href;
		if (link.hreflang) { etag = etag+'|'+link.hreflang; }
		etag = etag+']';

		this.encloseSelection(stag,etag);
	}
};