/*
Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
if(!dojo._hasResource["dojox.gfx._base"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.gfx._base"] = true;
dojo.provide("dojox.gfx._base");
(function(){
var g = dojox.gfx, b = g._base;
// candidates for dojox.style (work on VML and SVG nodes)
g._hasClass = function(/*DomNode*/node, /*String*/classStr){
// summary:
// Returns whether or not the specified classes are a portion of the
// class list currently applied to the node.
// return (new RegExp('(^|\\s+)'+classStr+'(\\s+|$)')).test(node.className) // Boolean
var cls = node.getAttribute("className");
return cls && (" " + cls + " ").indexOf(" " + classStr + " ") >= 0; // Boolean
};
g._addClass = function(/*DomNode*/node, /*String*/classStr){
// summary:
// Adds the specified classes to the end of the class list on the
// passed node.
var cls = node.getAttribute("className") || "";
if(!cls || (" " + cls + " ").indexOf(" " + classStr + " ") < 0){
node.setAttribute("className", cls + (cls ? " " : "") + classStr);
}
};
g._removeClass = function(/*DomNode*/node, /*String*/classStr){
// summary: Removes classes from node.
var cls = node.getAttribute("className");
if(cls){
node.setAttribute(
"className",
cls.replace(new RegExp('(^|\\s+)' + classStr + '(\\s+|$)'), "$1$2")
);
}
};
// candidate for dojox.html.metrics (dynamic font resize handler is not implemented here)
// derived from Morris John's emResized measurer
b._getFontMeasurements = function(){
// summary:
// Returns an object that has pixel equivilents of standard font
// size values.
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.isIE){
// we do a font-size fix if and only if one isn't applied already.
// NOTE: If someone set the fontSize on the HTML Element, this will kill it.
dojo.doc.documentElement.style.fontSize="100%";
}
// set up the measuring node.
var div = dojo.create("div", {style: {
position: "absolute",
left: "0",
top: "-100px",
width: "30px",
height: "1000em",
borderWidth: "0",
margin: "0",
padding: "0",
outline: "none",
lineHeight: "1",
overflow: "hidden"
}}, dojo.body());
// do the measurements.
for(var p in heights){
div.style.fontSize = p;
heights[p] = Math.round(div.offsetHeight * 12/16) * 16/12 / 1000;
}
dojo.body().removeChild(div);
return heights; // object
};
var fontMeasurements = null;
b._getCachedFontMeasurements = function(recalculate){
if(recalculate || !fontMeasurements){
fontMeasurements = b._getFontMeasurements();
}
return fontMeasurements;
};
// candidate for dojox.html.metrics
var measuringNode = null, empty = {};
b._getTextBox = function( /*String*/ text,
/*Object*/ style,
/*String?*/ className){
var m, s, al = arguments.length;
if(!measuringNode){
measuringNode = dojo.create("div", {style: {
position: "absolute",
top: "-10000px",
left: "0"
}}, dojo.body());
}
m = measuringNode;
// reset styles
m.className = "";
s = m.style;
s.borderWidth = "0";
s.margin = "0";
s.padding = "0";
s.outline = "0";
// set new style
if(al > 1 && style){
for(var i in style){
if(i in empty){ continue; }
s[i] = style[i];
}
}
// set classes
if(al > 2 && className){
m.className = className;
}
// take a measure
m.innerHTML = text;
if(m["getBoundingClientRect"]){
var bcr = m.getBoundingClientRect();
return {l: bcr.left, t: bcr.top, w: bcr.width || (bcr.right - bcr.left), h: bcr.height || (bcr.bottom - bcr.top)};
}else{
return dojo.marginBox(m);
}
};
// candidate for dojo.dom
var uniqueId = 0;
b._getUniqueId = function(){
// summary: returns a unique string for use with any DOM element
var id;
do{
id = dojo._scopeName + "Unique" + (++uniqueId);
}while(dojo.byId(id));
return id;
};
})();
dojo.mixin(dojox.gfx, {
// summary:
// defines constants, prototypes, and utility functions
// default shapes, which are used to fill in missing parameters
defaultPath: {
type: "path", path: ""
},
defaultPolyline: {
type: "polyline", points: []
},
defaultRect: {
type: "rect", x: 0, y: 0, width: 100, height: 100, r: 0
},
defaultEllipse: {
type: "ellipse", cx: 0, cy: 0, rx: 200, ry: 100
},
defaultCircle: {
type: "circle", cx: 0, cy: 0, r: 100
},
defaultLine: {
type: "line", x1: 0, y1: 0, x2: 100, y2: 100
},
defaultImage: {
type: "image", x: 0, y: 0, width: 0, height: 0, src: ""
},
defaultText: {
type: "text", x: 0, y: 0, text: "", align: "start",
decoration: "none", rotated: false, kerning: true
},
defaultTextPath: {
type: "textpath", text: "", align: "start",
decoration: "none", rotated: false, kerning: true
},
// default geometric attributes
defaultStroke: {
type: "stroke", color: "black", style: "solid", width: 1,
cap: "butt", join: 4
},
defaultLinearGradient: {
type: "linear", x1: 0, y1: 0, x2: 100, y2: 100,
colors: [
{ offset: 0, color: "black" }, { offset: 1, color: "white" }
]
},
defaultRadialGradient: {
type: "radial", cx: 0, cy: 0, r: 100,
colors: [
{ offset: 0, color: "black" }, { offset: 1, color: "white" }
]
},
defaultPattern: {
type: "pattern", x: 0, y: 0, width: 0, height: 0, src: ""
},
defaultFont: {
type: "font", style: "normal", variant: "normal",
weight: "normal", size: "10pt", family: "serif"
},
getDefault: (function(){
var typeCtorCache = {};
// a memoized delegate()
return function(/*String*/ type){
var t = typeCtorCache[type];
if(t){
return new t();
}
t = typeCtorCache[type] = new Function;
t.prototype = dojox.gfx[ "default" + type ];
return new t();
}
})(),
normalizeColor: function(/*Color*/ color){
// summary:
// converts any legal color representation to normalized
// dojo.Color object
return (color instanceof dojo.Color) ? color : new dojo.Color(color); // dojo.Color
},
normalizeParameters: function(existed, update){
// summary:
// updates an existing object with properties from an "update"
// object
// existed: Object
// the "target" object to be updated
// update: Object
// the "update" object, whose properties will be used to update
// the existed object
if(update){
var empty = {};
for(var x in existed){
if(x in update && !(x in empty)){
existed[x] = update[x];
}
}
}
return existed; // Object
},
makeParameters: function(defaults, update){
// summary:
// copies the original object, and all copied properties from the
// "update" object
// defaults: Object
// the object to be cloned before updating
// update: Object
// the object, which properties are to be cloned during updating
if(!update){
// return dojo.clone(defaults);
return dojo.delegate(defaults);
}
var result = {};
for(var i in defaults){
if(!(i in result)){
result[i] = dojo.clone((i in update) ? update[i] : defaults[i]);
}
}
return result; // Object
},
formatNumber: function(x, addSpace){
// summary: converts a number to a string using a fixed notation
// x: Number: number to be converted
// addSpace: Boolean?: if it is true, add a space before a positive number
var val = x.toString();
if(val.indexOf("e") >= 0){
val = x.toFixed(4);
}else{
var point = val.indexOf(".");
if(point >= 0 && val.length - point > 5){
val = x.toFixed(4);
}
}
if(x < 0){
return val; // String
}
return addSpace ? " " + val : val; // String
},
// font operations
makeFontString: function(font){
// summary: converts a font object to a CSS font string
// font: Object: font object (see dojox.gfx.defaultFont)
return font.style + " " + font.variant + " " + font.weight + " " + font.size + " " + font.family; // Object
},
splitFontString: function(str){
// summary:
// converts a CSS font string to a font object
// description:
// Converts a CSS font string to a gfx font object. The CSS font
// string components should follow the W3C specified order
// (see http://www.w3.org/TR/CSS2/fonts.html#font-shorthand):
// style, variant, weight, size, optional line height (will be
// ignored), and family.
// str: String
// a CSS font string
var font = dojox.gfx.getDefault("Font");
var t = str.split(/\s+/);
do{
if(t.length < 5){ break; }
font.style = t[0];
font.variant = t[1];
font.weight = t[2];
var i = t[3].indexOf("/");
font.size = i < 0 ? t[3] : t[3].substring(0, i);
var j = 4;
if(i < 0){
if(t[4] == "/"){
j = 6;
}else if(t[4].charAt(0) == "/"){
j = 5;
}
}
if(j < t.length){
font.family = t.slice(j).join(" ");
}
}while(false);
return font; // Object
},
// length operations
cm_in_pt: 72 / 2.54, // Number: points per centimeter
mm_in_pt: 7.2 / 2.54, // Number: points per millimeter
px_in_pt: function(){
// summary: returns a number of pixels per point
return dojox.gfx._base._getCachedFontMeasurements()["12pt"] / 12; // Number
},
pt2px: function(len){
// summary: converts points to pixels
// len: Number: a value in points
return len * dojox.gfx.px_in_pt(); // Number
},
px2pt: function(len){
// summary: converts pixels to points
// len: Number: a value in pixels
return len / dojox.gfx.px_in_pt(); // Number
},
normalizedLength: function(len) {
// summary: converts any length value to pixels
// len: String: a length, e.g., "12pc"
if(len.length == 0) return 0;
if(len.length > 2){
var px_in_pt = dojox.gfx.px_in_pt();
var val = parseFloat(len);
switch(len.slice(-2)){
case "px": return val;
case "pt": return val * px_in_pt;
case "in": return val * 72 * px_in_pt;
case "pc": return val * 12 * px_in_pt;
case "mm": return val * dojox.gfx.mm_in_pt * px_in_pt;
case "cm": return val * dojox.gfx.cm_in_pt * px_in_pt;
}
}
return parseFloat(len); // Number
},
// a constant used to split a SVG/VML path into primitive components
pathVmlRegExp: /([A-Za-z]+)|(\d+(\.\d+)?)|(\.\d+)|(-\d+(\.\d+)?)|(-\.\d+)/g,
pathSvgRegExp: /([A-Za-z])|(\d+(\.\d+)?)|(\.\d+)|(-\d+(\.\d+)?)|(-\.\d+)/g,
equalSources: function(a, b){
// summary: compares event sources, returns true if they are equal
return a && b && a == b;
},
switchTo: function(renderer){
var ns = dojox.gfx[renderer];
if(ns){
dojo.forEach(["Group", "Rect", "Ellipse", "Circle", "Line",
"Polyline", "Image", "Text", "Path", "TextPath",
"Surface", "createSurface"], function(name){
dojox.gfx[name] = ns[name];
});
}
}
});
}