Subversion Repositories Applications.papyrus

/*

	Copyright (c) 2004-2006, The Dojo Foundation

	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the

	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml

*/

dojo.provide("dojo.html.metrics");

dojo.require("dojo.html.layout");

dojo.html.getScrollbar = function () {

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

	scroll.style.width = "100px";

	scroll.style.height = "100px";

	scroll.style.overflow = "scroll";

	scroll.style.position = "absolute";

	scroll.style.top = "-300px";

	scroll.style.left = "0px";

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

	test.style.width = "400px";

	test.style.height = "400px";

	scroll.appendChild(test);

	dojo.body().appendChild(scroll);

	var width = scroll.offsetWidth - scroll.clientWidth;

	dojo.body().removeChild(scroll);

	scroll.removeChild(test);

	scroll = test = null;

	return {width:width};

};

dojo.html.getFontMeasurements = function () {

	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};

	if (dojo.render.html.ie) {

		document.documentElement.style.fontSize = "100%";

	}

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

	div.style.position = "absolute";

	div.style.left = "-100px";

	div.style.top = "0";

	div.style.width = "30px";

	div.style.height = "1000em";

	div.style.border = "0";

	div.style.margin = "0";

	div.style.padding = "0";

	div.style.outline = "0";

	div.style.lineHeight = "1";

	div.style.overflow = "hidden";

	dojo.body().appendChild(div);

	for (var p in heights) {

		div.style.fontSize = p;

		heights[p] = Math.round(div.offsetHeight * 12 / 16) * 16 / 12 / 1000;

	}

	dojo.body().removeChild(div);

	div = null;

	return heights;

};

dojo.html._fontMeasurements = null;

dojo.html.getCachedFontMeasurements = function (recalculate) {

	if (recalculate || !dojo.html._fontMeasurements) {

		dojo.html._fontMeasurements = dojo.html.getFontMeasurements();

	}

	return dojo.html._fontMeasurements;

};

dojo.html.measureFragment = function (node, html, boxType) {

	var clone = node.cloneNode(true);

	clone.innerHTML = html;

	node.parentNode.appendChild(clone);

	var ret = dojo.html.getElementBox(clone, boxType);

	node.parentNode.removeChild(clone);

	clone = null;

	return ret;

};

dojo.html.getFittedFragment = function (node, html) {

	function cl(node) {

		var element = document.createElement(node.tagName);

		element.id = node.id + "-clone";

		element.className = node.className;

		for (var j = 0; j < node.attributes.length; j++) {

			if (node.attributes[j].specified) {

				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") {

					element.setAttribute(node.attributes[j].nodeName.toLowerCase(), node.attributes[j].nodeValue);

				}

			}

		}

		return element;

	}

	var height = dojo.html.getFontMeasurements()["16px"];

	var n = cl(node);

	n.style.width = dojo.html.getBorderBox(node).width + "px";

	n.style.height = (height + 4) + "px";

	node.parentNode.appendChild(n);

	var rem = dojo.html.fitToElement(n, html);

	var ret = n.innerHTML;

	n.parentNode.removeChild(n);

	return ret;

};

dojo.html.fitToElement = function (node, html) {

	function cl(node) {

		var element = document.createElement(node.tagName);

		element.id = node.id + "-clone";

		element.className = node.className;

		for (var j = 0; j < node.attributes.length; j++) {

			if (node.attributes[j].specified) {

				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") {

					element.setAttribute(node.attributes[j].nodeName.toLowerCase(), node.attributes[j].nodeValue);

				}

			}

		}

		return element;

	}

	var clone = cl(node);

	node.parentNode.appendChild(clone);

	var t = dojo.html.getBorderBox(node);

	clone.style.width = t.width + "px";

	var singletons = ["br", "img", "hr", "input", "!--"];

	var chop = ["<BR>", "<br>", "<br/>", "<br />", "<p></p>", "<P></P>"];

	var openTags = [];

	var str = html;

	var i = 0;

	var limit = str.length;

	var add = 0;

	var doLoop = true;

	clone.innerHTML = str;

	while (doLoop) {

		add = Math.round((limit - i) / 2);

		if (add <= 1) {

			doLoop = false;

		}

		i += add;

		clone.innerHTML = str.substr(0, i);

		if (clone.offsetHeight > t.height) {

			limit = i;

			i -= add;

		}

	}

	if (str.substr(0, i) != str) {

		var lastSpace = str.substr(0, i).lastIndexOf(" ");

		var lastNewLine = str.substr(0, i).lastIndexOf("\n");

		var lastGreater = str.substr(0, i).lastIndexOf(">");

		var lastLess = str.substr(0, i).lastIndexOf("<");

		if (lastLess <= lastGreater && lastNewLine == i - 1) {

			i = i;

		} else {

			if (lastSpace != -1 && lastSpace > lastGreater && lastGreater > lastLess) {

				i = lastSpace + 1;

			} else {

				if (lastLess > lastGreater) {

					i = lastLess;

				} else {

					if (lastGreater != -1) {

						i = lastGreater + 1;

					}

				}

			}

		}

	}

	str = str.substr(0, i);

	var ret = html.substr(str.length);

	var doPush = true;

	var tags = str.split("<");

	tags.shift();

	for (var j = 0; j < tags.length; j++) {

		tags[j] = tags[j].split(">")[0];

		if (tags[j].charAt(tags[j].length - 1) == "/") {

			continue;

		}

		if (tags[j].charAt(0) != "/") {

			for (var k = 0; k < singletons.length; k++) {

				if (tags[j].split(" ")[0].toLowerCase() == singletons[k]) {

					doPush = false;

				}

			}

			if (doPush) {

				openTags.push(tags[j]);

			}

			doPush = true;

		} else {

			openTags.pop();

		}

	}

	for (var j = 0; j < chop.length; j++) {

		if (ret.charAt(0) == "\n") {

			ret = ret.substr(1);

		}

		while (ret.indexOf(chop[j]) == 0) {

			ret = ret.substr(chop[j].length);

		}

	}

	for (var j = openTags.length - 1; j >= 0; j--) {

		if (str.lastIndexOf(openTags[j]) == (str.length - openTags[j].length - 1)) {

			str = str.substring(0, str.lastIndexOf(openTags[j]));

		} else {

			str += "</" + openTags[j] + ">";

		}

		if (ret.length > 0) {

			ret = "<" + openTags[j] + ">" + ret;

		}

	}

	for (var j = 0; j < chop.length; j++) {

		if (ret.charAt(0) == "\n") {

			ret = ret.substr(1);

		}

		while (ret.indexOf(chop[j]) == 0) {

			ret = ret.substr(chop[j].length);

		}

	}

	node.innerHTML = str;

	clone.parentNode.removeChild(clone);

	clone = null;

	return ret;

};