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1318 alexandre_ 1
/*
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	Copyright (c) 2004-2006, The Dojo Foundation
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	All Rights Reserved.
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	Licensed under the Academic Free License version 2.1 or above OR the
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	modified BSD license. For more information on Dojo licensing, see:
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		http://dojotoolkit.org/community/licensing.shtml
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*/
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1422 alexandre_ 11
 
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1318 alexandre_ 13
dojo.provide("dojo.html.metrics");
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dojo.require("dojo.html.layout");
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dojo.html.getScrollbar = function () {
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	var scroll = document.createElement("div");
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	scroll.style.width = "100px";
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	scroll.style.height = "100px";
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	scroll.style.overflow = "scroll";
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	scroll.style.position = "absolute";
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	scroll.style.top = "-300px";
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	scroll.style.left = "0px";
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	var test = document.createElement("div");
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	test.style.width = "400px";
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	test.style.height = "400px";
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	scroll.appendChild(test);
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	dojo.body().appendChild(scroll);
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	var width = scroll.offsetWidth - scroll.clientWidth;
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	dojo.body().removeChild(scroll);
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	scroll.removeChild(test);
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	scroll = test = null;
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	return {width:width};
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};
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dojo.html.getFontMeasurements = function () {
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	var heights = {"1em":0, "1ex":0, "100%":0, "12pt":0, "16px":0, "xx-small":0, "x-small":0, "small":0, "medium":0, "large":0, "x-large":0, "xx-large":0};
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	if (dojo.render.html.ie) {
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		document.documentElement.style.fontSize = "100%";
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	}
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	var div = document.createElement("div");
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	div.style.position = "absolute";
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	div.style.left = "-100px";
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	div.style.top = "0";
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	div.style.width = "30px";
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	div.style.height = "1000em";
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	div.style.border = "0";
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	div.style.margin = "0";
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	div.style.padding = "0";
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	div.style.outline = "0";
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	div.style.lineHeight = "1";
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	div.style.overflow = "hidden";
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	dojo.body().appendChild(div);
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	for (var p in heights) {
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		div.style.fontSize = p;
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		heights[p] = Math.round(div.offsetHeight * 12 / 16) * 16 / 12 / 1000;
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	}
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	dojo.body().removeChild(div);
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	div = null;
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	return heights;
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};
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dojo.html._fontMeasurements = null;
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dojo.html.getCachedFontMeasurements = function (recalculate) {
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	if (recalculate || !dojo.html._fontMeasurements) {
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		dojo.html._fontMeasurements = dojo.html.getFontMeasurements();
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	}
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	return dojo.html._fontMeasurements;
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};
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dojo.html.measureFragment = function (node, html, boxType) {
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	var clone = node.cloneNode(true);
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	clone.innerHTML = html;
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	node.parentNode.appendChild(clone);
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	var ret = dojo.html.getElementBox(clone, boxType);
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	node.parentNode.removeChild(clone);
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	clone = null;
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	return ret;
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};
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dojo.html.getFittedFragment = function (node, html) {
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	function cl(node) {
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		var element = document.createElement(node.tagName);
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		element.id = node.id + "-clone";
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		element.className = node.className;
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		for (var j = 0; j < node.attributes.length; j++) {
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			if (node.attributes[j].specified) {
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				if (node.attributes[j].nodeName.toLowerCase() != "style" && node.attributes[j].nodeName.toLowerCase() != "edited" && node.attributes[j].nodeName.toLowerCase() != "contenteditable" && node.attributes[j].nodeName.toLowerCase() != "id" && node.attributes[j].nodeName.toLowerCase() != "class") {
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					element.setAttribute(node.attributes[j].nodeName.toLowerCase(), node.attributes[j].nodeValue);
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				}
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			}
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		}
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		return element;
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	}
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	var height = dojo.html.getFontMeasurements()["16px"];
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	var n = cl(node);
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	n.style.width = dojo.html.getBorderBox(node).width + "px";
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	n.style.height = (height + 4) + "px";
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	node.parentNode.appendChild(n);
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	var rem = dojo.html.fitToElement(n, html);
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	var ret = n.innerHTML;
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	n.parentNode.removeChild(n);
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	return ret;
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};
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dojo.html.fitToElement = function (node, html) {
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	function cl(node) {
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		var element = document.createElement(node.tagName);
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		element.id = node.id + "-clone";
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		element.className = node.className;
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		for (var j = 0; j < node.attributes.length; j++) {
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			if (node.attributes[j].specified) {
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				if (node.attributes[j].nodeName.toLowerCase() != "style" && node.attributes[j].nodeName.toLowerCase() != "edited" && node.attributes[j].nodeName.toLowerCase() != "contenteditable" && node.attributes[j].nodeName.toLowerCase() != "id" && node.attributes[j].nodeName.toLowerCase() != "class") {
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					element.setAttribute(node.attributes[j].nodeName.toLowerCase(), node.attributes[j].nodeValue);
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				}
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			}
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		}
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		return element;
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	}
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	var clone = cl(node);
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	node.parentNode.appendChild(clone);
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	var t = dojo.html.getBorderBox(node);
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	clone.style.width = t.width + "px";
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	var singletons = ["br", "img", "hr", "input", "!--"];
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	var chop = ["<BR>", "<br>", "<br/>", "<br />", "<p></p>", "<P></P>"];
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	var openTags = [];
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	var str = html;
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	var i = 0;
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	var limit = str.length;
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	var add = 0;
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	var doLoop = true;
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	clone.innerHTML = str;
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	while (doLoop) {
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		add = Math.round((limit - i) / 2);
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		if (add <= 1) {
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			doLoop = false;
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		}
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		i += add;
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		clone.innerHTML = str.substr(0, i);
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		if (clone.offsetHeight > t.height) {
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			limit = i;
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			i -= add;
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		}
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	}
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	if (str.substr(0, i) != str) {
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		var lastSpace = str.substr(0, i).lastIndexOf(" ");
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		var lastNewLine = str.substr(0, i).lastIndexOf("\n");
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		var lastGreater = str.substr(0, i).lastIndexOf(">");
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		var lastLess = str.substr(0, i).lastIndexOf("<");
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		if (lastLess <= lastGreater && lastNewLine == i - 1) {
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			i = i;
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		} else {
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			if (lastSpace != -1 && lastSpace > lastGreater && lastGreater > lastLess) {
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				i = lastSpace + 1;
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			} else {
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				if (lastLess > lastGreater) {
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					i = lastLess;
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				} else {
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					if (lastGreater != -1) {
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						i = lastGreater + 1;
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					}
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				}
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			}
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		}
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	}
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	str = str.substr(0, i);
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	var ret = html.substr(str.length);
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	var doPush = true;
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	var tags = str.split("<");
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	tags.shift();
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	for (var j = 0; j < tags.length; j++) {
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		tags[j] = tags[j].split(">")[0];
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		if (tags[j].charAt(tags[j].length - 1) == "/") {
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			continue;
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		}
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		if (tags[j].charAt(0) != "/") {
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			for (var k = 0; k < singletons.length; k++) {
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				if (tags[j].split(" ")[0].toLowerCase() == singletons[k]) {
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					doPush = false;
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				}
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			}
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			if (doPush) {
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				openTags.push(tags[j]);
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			}
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			doPush = true;
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		} else {
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			openTags.pop();
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		}
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	}
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	for (var j = 0; j < chop.length; j++) {
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		if (ret.charAt(0) == "\n") {
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			ret = ret.substr(1);
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		}
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		while (ret.indexOf(chop[j]) == 0) {
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			ret = ret.substr(chop[j].length);
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		}
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	}
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	for (var j = openTags.length - 1; j >= 0; j--) {
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		if (str.lastIndexOf(openTags[j]) == (str.length - openTags[j].length - 1)) {
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			str = str.substring(0, str.lastIndexOf(openTags[j]));
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		} else {
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			str += "</" + openTags[j] + ">";
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		}
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		if (ret.length > 0) {
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			ret = "<" + openTags[j] + ">" + ret;
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		}
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	}
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	for (var j = 0; j < chop.length; j++) {
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		if (ret.charAt(0) == "\n") {
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			ret = ret.substr(1);
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		}
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		while (ret.indexOf(chop[j]) == 0) {
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			ret = ret.substr(chop[j].length);
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		}
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	}
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	node.innerHTML = str;
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	clone.parentNode.removeChild(clone);
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	clone = null;
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	return ret;
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};
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