9011c8ca0a
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.4-rc2@3089 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
462 lines
14 KiB
JavaScript
462 lines
14 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under a BSD license.
|
|
* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
|
|
* for the full text of the license. */
|
|
|
|
/**
|
|
* @class
|
|
*
|
|
* @requires OpenLayers/Renderer/Elements.js
|
|
*/
|
|
OpenLayers.Renderer.SVG = OpenLayers.Class.create();
|
|
OpenLayers.Renderer.SVG.prototype =
|
|
OpenLayers.Class.inherit(OpenLayers.Renderer.Elements, {
|
|
|
|
/** @type String */
|
|
xmlns: "http://www.w3.org/2000/svg",
|
|
|
|
// Firefox has a limitation where values larger or smaller than about
|
|
// 15000 in an SVG document lock the browser up. This works around it.
|
|
/** @type Integer */
|
|
maxPixel: 15000,
|
|
|
|
|
|
/** @type Float
|
|
@private */
|
|
localResolution: null,
|
|
|
|
/**
|
|
* @constructor
|
|
*
|
|
* @param {String} containerID
|
|
*/
|
|
initialize: function(containerID) {
|
|
if (!this.supported()) {
|
|
return;
|
|
}
|
|
OpenLayers.Renderer.Elements.prototype.initialize.apply(this,
|
|
arguments);
|
|
},
|
|
|
|
/**
|
|
*
|
|
*/
|
|
destroy: function() {
|
|
OpenLayers.Renderer.Elements.prototype.destroy.apply(this, arguments);
|
|
},
|
|
|
|
/**
|
|
* @returns Whether or not the browser supports the SVG renderer
|
|
* @type Boolean
|
|
*/
|
|
supported: function() {
|
|
var svgFeature = "http://www.w3.org/TR/SVG11/feature#SVG";
|
|
var supported = (document.implementation.hasFeature("org.w3c.svg", "1.0") || document.implementation.hasFeature(svgFeature, "1.1"));
|
|
return supported;
|
|
},
|
|
|
|
/**
|
|
* @param {OpenLayers.Bounds} extent
|
|
* @private
|
|
*/
|
|
setExtent: function(extent) {
|
|
OpenLayers.Renderer.Elements.prototype.setExtent.apply(this,
|
|
arguments);
|
|
|
|
var resolution = this.getResolution();
|
|
|
|
|
|
// If the resolution has changed, start over changing the corner, because
|
|
// the features will redraw.
|
|
if (!this.localResolution || resolution != this.localResolution) {
|
|
this.left = -extent.left / resolution;
|
|
this.top = extent.top / resolution;
|
|
}
|
|
|
|
|
|
var left = 0;
|
|
var top = 0;
|
|
|
|
// If the resolution has not changed, we already have features, and we need
|
|
// to adjust the viewbox to fit them.
|
|
if (this.localResolution && resolution == this.localResolution) {
|
|
left = (this.left) - (-extent.left / resolution);
|
|
top = (this.top) - (extent.top / resolution);
|
|
}
|
|
|
|
// Store resolution for use later.
|
|
this.localResolution = resolution;
|
|
|
|
// Set the viewbox -- the left/top will be pixels-dragged-since-res change,
|
|
// the width/height will be pixels.
|
|
var extentString = left + " " + top + " " +
|
|
extent.getWidth() / resolution + " " + extent.getHeight() / resolution;
|
|
//var extentString = extent.left / resolution + " " + -extent.top / resolution + " " +
|
|
this.rendererRoot.setAttributeNS(null, "viewBox", extentString);
|
|
},
|
|
|
|
/**
|
|
* function
|
|
*
|
|
* sets the size of the drawing surface
|
|
*
|
|
* @param size {OpenLayers.Size} the size of the drawing surface
|
|
* @private
|
|
*/
|
|
setSize: function(size) {
|
|
OpenLayers.Renderer.prototype.setSize.apply(this, arguments);
|
|
|
|
this.rendererRoot.setAttributeNS(null, "width", this.size.w);
|
|
this.rendererRoot.setAttributeNS(null, "height", this.size.h);
|
|
},
|
|
|
|
|
|
|
|
|
|
/**
|
|
* @param geometry {OpenLayers.Geometry}
|
|
*
|
|
* @returns The corresponding node type for the specified geometry
|
|
* @type String
|
|
* @private
|
|
*/
|
|
getNodeType: function(geometry) {
|
|
var nodeType = null;
|
|
switch (geometry.CLASS_NAME) {
|
|
case "OpenLayers.Geometry.Point":
|
|
nodeType = "circle";
|
|
break;
|
|
case "OpenLayers.Geometry.Rectangle":
|
|
nodeType = "rect";
|
|
break;
|
|
case "OpenLayers.Geometry.LineString":
|
|
nodeType = "polyline";
|
|
break;
|
|
case "OpenLayers.Geometry.LinearRing":
|
|
nodeType = "polygon";
|
|
break;
|
|
case "OpenLayers.Geometry.Polygon":
|
|
case "OpenLayers.Geometry.Curve":
|
|
case "OpenLayers.Geometry.Surface":
|
|
nodeType = "path";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return nodeType;
|
|
},
|
|
|
|
/**
|
|
* Use to set all the style attributes to a SVG node.
|
|
*
|
|
* Note: takes care to adjust stroke width and point radius
|
|
* to be resolution-relative
|
|
*
|
|
* @param node {SVGDomElement} an SVG element to decorate
|
|
* @param {Object} style
|
|
* @param {Object} options
|
|
* @option isFilled {boolean}
|
|
* @option isStroked {boolean}
|
|
* @private
|
|
*/
|
|
setStyle: function(node, style, options) {
|
|
style = style || node._style;
|
|
options = options || node._options;
|
|
|
|
if (node._geometryClass == "OpenLayers.Geometry.Point") {
|
|
node.setAttributeNS(null, "r", style.pointRadius);
|
|
}
|
|
|
|
if (options.isFilled) {
|
|
node.setAttributeNS(null, "fill", style.fillColor);
|
|
node.setAttributeNS(null, "fill-opacity", style.fillOpacity);
|
|
} else {
|
|
node.setAttributeNS(null, "fill", "none");
|
|
}
|
|
|
|
if (options.isStroked) {
|
|
node.setAttributeNS(null, "stroke", style.strokeColor);
|
|
node.setAttributeNS(null, "stroke-opacity", style.strokeOpacity);
|
|
node.setAttributeNS(null, "stroke-width", style.strokeWidth);
|
|
} else {
|
|
node.setAttributeNS(null, "stroke", "none");
|
|
}
|
|
|
|
if (style.pointerEvents) {
|
|
node.setAttributeNS(null, "pointer-events", style.pointerEvents);
|
|
}
|
|
|
|
if (style.cursor) {
|
|
node.setAttributeNS(null, "cursor", style.cursor);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* @private
|
|
*
|
|
* @param {String} type Kind of node to draw
|
|
* @param {String} id Id for node
|
|
*
|
|
* @returns A new node of the given type and id
|
|
* @type DOMElement
|
|
*/
|
|
createNode: function(type, id) {
|
|
var node = document.createElementNS(this.xmlns, type);
|
|
if (id) {
|
|
node.setAttributeNS(null, "id", id);
|
|
}
|
|
return node;
|
|
},
|
|
|
|
/**
|
|
* @private
|
|
*
|
|
* @param {String} type Kind of node to draw
|
|
* @param {String} id Id for node
|
|
*
|
|
* @returns Whether or not the specified node is of the specified type
|
|
* @type Boolean
|
|
*/
|
|
nodeTypeCompare: function(node, type) {
|
|
return (type == node.nodeName);
|
|
},
|
|
|
|
/**
|
|
* @returns The specific render engine's root element
|
|
* @type DOMElement
|
|
* @private
|
|
*/
|
|
createRenderRoot: function() {
|
|
var id = this.container.id + "_svgRoot";
|
|
var rendererRoot = this.nodeFactory(id, "svg");
|
|
return rendererRoot;
|
|
},
|
|
|
|
/**
|
|
* @returns The main root element to which we'll add vectors
|
|
* @type DOMElement
|
|
* @private
|
|
*/
|
|
createRoot: function() {
|
|
var id = this.container.id + "_root";
|
|
|
|
var root = this.nodeFactory(id, "g");
|
|
|
|
// flip the SVG display Y axis upside down so it
|
|
// matches the display Y axis of the map
|
|
root.setAttributeNS(null, "transform", "scale(1, -1)");
|
|
|
|
return root;
|
|
},
|
|
|
|
/**************************************
|
|
* *
|
|
* GEOMETRY DRAWING FUNCTIONS *
|
|
* *
|
|
**************************************/
|
|
|
|
/**
|
|
* @param {DOMElement} node
|
|
* @param {OpenLayers.Geometry} geometry
|
|
* @private
|
|
*/
|
|
drawPoint: function(node, geometry) {
|
|
this.drawCircle(node, geometry, 1);
|
|
},
|
|
|
|
/**
|
|
* @param {DOMElement} node
|
|
* @param {OpenLayers.Geometry} geometry
|
|
* @param {float} radius
|
|
* @private
|
|
*/
|
|
drawCircle: function(node, geometry, radius) {
|
|
var resolution = this.getResolution();
|
|
var x = (geometry.x / resolution + this.left);
|
|
var y = (geometry.y / resolution - this.top);
|
|
var draw = true;
|
|
if (x < -this.maxPixel || x > this.maxPixel) { draw = false; }
|
|
if (y < -this.maxPixel || y > this.maxPixel) { draw = false; }
|
|
|
|
if (draw) {
|
|
node.setAttributeNS(null, "cx", x);
|
|
node.setAttributeNS(null, "cy", y);
|
|
node.setAttributeNS(null, "r", radius);
|
|
} else {
|
|
node.setAttributeNS(null, "cx", "");
|
|
node.setAttributeNS(null, "cy", "");
|
|
node.setAttributeNS(null, "r", 0);
|
|
}
|
|
|
|
},
|
|
|
|
/**
|
|
* @param {DOMElement} node
|
|
* @param {OpenLayers.Geometry} geometry
|
|
* @private
|
|
*/
|
|
drawLineString: function(node, geometry) {
|
|
node.setAttributeNS(null, "points", this.getComponentsString(geometry.components));
|
|
},
|
|
|
|
/**
|
|
* @param {DOMElement} node
|
|
* @param {OpenLayers.Geometry} geometry
|
|
* @private
|
|
*/
|
|
drawLinearRing: function(node, geometry) {
|
|
node.setAttributeNS(null, "points", this.getComponentsString(geometry.components));
|
|
},
|
|
|
|
/**
|
|
* @param {DOMElement} node
|
|
* @param {OpenLayers.Geometry} geometry
|
|
* @private
|
|
*/
|
|
drawPolygon: function(node, geometry) {
|
|
var d = "";
|
|
var draw = true;
|
|
for (var j = 0; j < geometry.components.length; j++) {
|
|
var linearRing = geometry.components[j];
|
|
d += " M";
|
|
for (var i = 0; i < linearRing.components.length; i++) {
|
|
var component = this.getShortString(linearRing.components[i])
|
|
if (component) {
|
|
d += " " + component;
|
|
} else {
|
|
draw = false;
|
|
}
|
|
}
|
|
}
|
|
d += " z";
|
|
if (draw) {
|
|
node.setAttributeNS(null, "d", d);
|
|
node.setAttributeNS(null, "fill-rule", "evenodd");
|
|
} else {
|
|
node.setAttributeNS(null, "d", "");
|
|
}
|
|
},
|
|
|
|
/**
|
|
* @param {DOMElement} node
|
|
* @param {OpenLayers.Geometry} geometry
|
|
* @private
|
|
*/
|
|
drawRectangle: function(node, geometry) {
|
|
// This needs to be reworked
|
|
var x = (geometry.x / resolution + this.left);
|
|
var y = (geometry.y / resolution - this.top);
|
|
var draw = true;
|
|
if (x < -this.maxPixel || x > this.maxPixel) { draw = false; }
|
|
if (y < -this.maxPixel || y > this.maxPixel) { draw = false; }
|
|
if (draw) {
|
|
node.setAttributeNS(null, "x", x);
|
|
node.setAttributeNS(null, "y", y);
|
|
node.setAttributeNS(null, "width", geometry.width);
|
|
node.setAttributeNS(null, "height", geometry.height);
|
|
} else {
|
|
node.setAttributeNS(null, "x", "");
|
|
node.setAttributeNS(null, "y", "");
|
|
node.setAttributeNS(null, "width", 0);
|
|
node.setAttributeNS(null, "height", 0);
|
|
}
|
|
|
|
},
|
|
|
|
|
|
/**
|
|
* @param {DOMElement} node
|
|
* @param {OpenLayers.Geometry} geometry
|
|
* @private
|
|
*/
|
|
drawCurve: function(node, geometry) {
|
|
var d = null;
|
|
var draw = true;
|
|
for (var i = 0; i < geometry.components.length; i++) {
|
|
if ((i%3) == 0 && (i/3) == 0) {
|
|
var component = this.getShortString(geometry.components[i]);
|
|
if (!component) { draw = false; }
|
|
d = "M " + component;
|
|
} else if ((i%3) == 1) {
|
|
var component = this.getShortString(geometry.components[i]);
|
|
if (!component) { draw = false; }
|
|
d += " C " + component;
|
|
} else {
|
|
var component = this.getShortString(geometry.components[i]);
|
|
if (!component) { draw = false; }
|
|
d += " " + component;
|
|
}
|
|
}
|
|
if (draw) {
|
|
node.setAttributeNS(null, "d", d);
|
|
} else {
|
|
node.setAttributeNS(null, "d", "");
|
|
}
|
|
},
|
|
|
|
/**
|
|
* @param {DOMElement} node
|
|
* @param {OpenLayers.Geometry} geometry
|
|
* @private
|
|
*/
|
|
drawSurface: function(node, geometry) {
|
|
|
|
// create the svg path string representation
|
|
var d = null;
|
|
var draw = true;
|
|
for (var i = 0; i < geometry.components.length; i++) {
|
|
if ((i%3) == 0 && (i/3) == 0) {
|
|
var component = this.getShortString(geometry.components[i]);
|
|
if (!component) { draw = false; }
|
|
d = "M " + component;
|
|
} else if ((i%3) == 1) {
|
|
var component = this.getShortString(geometry.components[i]);
|
|
if (!component) { draw = false; }
|
|
d += " C " + component;
|
|
} else {
|
|
var component = this.getShortString(geometry.components[i]);
|
|
if (!component) { draw = false; }
|
|
d += " " + component;
|
|
}
|
|
}
|
|
d += " Z";
|
|
if (draw) {
|
|
node.setAttributeNS(null, "d", d);
|
|
} else {
|
|
node.setAttributeNS(null, "d", "");
|
|
}
|
|
},
|
|
|
|
/**
|
|
* @param {Array} components array of points
|
|
* @private
|
|
*/
|
|
getComponentsString: function(components) {
|
|
var strings = [];
|
|
for(var i = 0; i < components.length; i++) {
|
|
var component = this.getShortString(components[i]);
|
|
if (!component) { return false; }
|
|
strings.push(component);
|
|
}
|
|
return strings.join(",");
|
|
},
|
|
|
|
|
|
/**
|
|
* @param {OpenLayers.Geometry.Point} point
|
|
* @private
|
|
*/
|
|
getShortString: function(point) {
|
|
var resolution = this.getResolution();
|
|
var x = (point.x / resolution + this.left);
|
|
var y = (point.y / resolution - this.top);
|
|
if (x < -this.maxPixel || x > this.maxPixel) { return false; }
|
|
if (y < -this.maxPixel || y > this.maxPixel) { return false; }
|
|
var string = x + "," + y;
|
|
return string;
|
|
|
|
},
|
|
|
|
/** @final @type String */
|
|
CLASS_NAME: "OpenLayers.Renderer.SVG"
|
|
});
|