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/* |
Copyright (c) 2004-2006, The Dojo Foundation |
All Rights Reserved. |
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Licensed under the Academic Free License version 2.1 or above OR the |
modified BSD license. For more information on Dojo licensing, see: |
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http://dojotoolkit.org/community/licensing.shtml |
*/ |
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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; |
}; |
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