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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");
// candidates for dojox.style (work on VML and SVG nodes)
dojox.gfx._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+|$)')).test(node.className) // Boolean
return ((" "+node.getAttribute("className")+" ").indexOf(" "+classStr+" ") >= 0); // Boolean
}
dojox.gfx._addClass = function(/*DomNode*/node, /*String*/classStr){
// summary:
// Adds the specified classes to the end of the class list on the
// passed node.
var cls = node.getAttribute("className");
if((" "+cls+" ").indexOf(" "+classStr+" ") < 0){
node.setAttribute("className", cls + (cls ? ' ' : '') + classStr);
}
}
dojox.gfx._removeClass = function(/*DomNode*/node, /*String*/classStr){
// summary: Removes classes from node.
node.setAttribute("className", node.getAttribute("className").replace(new RegExp('(^|\\s+)'+classStr+'(\\s+|$)'), "$1$2"));
}
// candidate for dojox.html.metrics (dynamic font resize handler is not implemented here)
// derived from Morris John's emResized measurer
dojox.gfx._base._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.doc.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);
// 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);
div = null;
return heights; // object
};
dojox.gfx._base._fontMeasurements = null;
dojox.gfx._base._getCachedFontMeasurements = function(recalculate){
if(recalculate || !dojox.gfx._base._fontMeasurements){
dojox.gfx._base._fontMeasurements = dojox.gfx._base._getFontMeasurements();
}
return dojox.gfx._base._fontMeasurements;
};
// candidate for dojo.dom
dojox.gfx._base._uniqueId = 0;
dojox.gfx._base._getUniqueId = function(){
// summary: returns a unique string for use with any DOM element
var id;
do{
id = "dojoUnique" + (++dojox.gfx._base._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"},
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);
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
// str: String: a CSS font string
var font = dojo.clone(dojox.gfx.defaultFont);
var t = str.split(/\s+/);
do{
if(t.length < 5){ break; }
font.style = t[0];
font.varian = 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;
break;
}
if(t[4].substr(0, 1) == "/"){
j = 5;
break;
}
}
if(j + 3 > t.length){ break; }
font.size = t[j];
font.family = t[j + 1];
}while(false);
return font; // Object
},
// length operations
cm_in_pt: 72 / 2.54, // Number: centimeters per inch
mm_in_pt: 7.2 / 2.54, // Number: millimeters per inch
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;
}
});
}

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